/* ==========================================================================
   DonationPal Design System
   A warm, utility-focused design language with full dark mode support
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties (Design Tokens)
   -------------------------------------------------------------------------- */

:root {
    /* Typography */
    --font-display: 'Plus Jakarta Sans', system-ui, sans-serif;
    --font-body: 'DM Sans', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Font Sizes - Fluid scale */
    --text-xs: clamp(0.7rem, 0.65rem + 0.2vw, 0.75rem);
    --text-sm: clamp(0.8rem, 0.75rem + 0.2vw, 0.875rem);
    --text-base: clamp(0.9rem, 0.85rem + 0.2vw, 1rem);
    --text-lg: clamp(1rem, 0.95rem + 0.3vw, 1.125rem);
    --text-xl: clamp(1.15rem, 1.05rem + 0.4vw, 1.25rem);
    --text-2xl: clamp(1.35rem, 1.2rem + 0.6vw, 1.5rem);
    --text-3xl: clamp(1.6rem, 1.4rem + 0.8vw, 1.875rem);
    --text-4xl: clamp(2rem, 1.7rem + 1.2vw, 2.5rem);
    --text-5xl: clamp(2.5rem, 2rem + 2vw, 3.5rem);

    /* Spacing Scale */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 20px rgba(13, 148, 136, 0.15);

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

    /* Z-Index Scale */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-popover: 600;
    --z-tooltip: 700;
    --z-toast: 800;

    /* Layout */
    --sidebar-width: 260px;
    --sidebar-collapsed: 72px;
    --header-height: 64px;
    --container-max: 1400px;
}

/* --------------------------------------------------------------------------
   Light Theme (Default)
   -------------------------------------------------------------------------- */

:root,
[data-theme="light"] {
    /* Primary - Warm Teal */
    --primary-50: #f0fdfa;
    --primary-100: #ccfbf1;
    --primary-200: #99f6e4;
    --primary-300: #5eead4;
    --primary-400: #2dd4bf;
    --primary-500: #14b8a6;
    --primary-600: #0d9488;
    --primary-700: #0f766e;
    --primary-800: #115e59;
    --primary-900: #134e4a;
    --primary-950: #042f2e;

    /* Secondary - Warm Amber */
    --secondary-50: #fffbeb;
    --secondary-100: #fef3c7;
    --secondary-200: #fde68a;
    --secondary-300: #fcd34d;
    --secondary-400: #fbbf24;
    --secondary-500: #f59e0b;
    --secondary-600: #d97706;
    --secondary-700: #b45309;
    --secondary-800: #92400e;
    --secondary-900: #78350f;

    /* Success - Emerald */
    --success-50: #ecfdf5;
    --success-100: #d1fae5;
    --success-500: #10b981;
    --success-600: #059669;
    --success-700: #047857;

    /* Warning - Amber */
    --warning-50: #fffbeb;
    --warning-100: #fef3c7;
    --warning-500: #f59e0b;
    --warning-600: #d97706;

    /* Error - Rose */
    --error-50: #fff1f2;
    --error-100: #ffe4e6;
    --error-500: #f43f5e;
    --error-600: #e11d48;
    --error-700: #be123c;

    /* Info - Cyan */
    --info-50: #ecfeff;
    --info-100: #cffafe;
    --info-500: #06b6d4;
    --info-600: #0891b2;
    --info-700: #0e7490;

    /* Neutral - Warm Stone */
    --neutral-50: #fafaf9;
    --neutral-100: #f5f5f4;
    --neutral-200: #e7e5e4;
    --neutral-300: #d6d3d1;
    --neutral-400: #a8a29e;
    --neutral-500: #78716c;
    --neutral-600: #57534e;
    --neutral-700: #44403c;
    --neutral-800: #292524;
    --neutral-900: #1c1917;
    --neutral-950: #0c0a09;

    /* Semantic Colors */
    --color-bg: #fafaf9;
    --color-bg-elevated: #ffffff;
    --color-bg-sunken: #f5f5f4;
    --color-bg-overlay: rgba(28, 25, 23, 0.5);

    --color-surface: #ffffff;
    --color-surface-hover: #fafaf9;
    --color-surface-active: #f5f5f4;

    --color-border: #e7e5e4;
    --color-border-subtle: #f5f5f4;
    --color-border-strong: #d6d3d1;

    --color-text: #1c1917;
    --color-text-secondary: #57534e;
    --color-text-muted: #78716c;
    --color-text-placeholder: #a8a29e;
    --color-text-inverse: #fafaf9;

    --color-primary: var(--primary-600);
    --color-primary-hover: var(--primary-700);
    --color-primary-subtle: var(--primary-50);

    --color-link: var(--primary-600);
    --color-link-hover: var(--primary-700);

    /* Semantic background aliases (for template compatibility) */
    --color-bg-primary: var(--color-bg);
    --color-bg-secondary: var(--color-bg-sunken);
    --color-bg-tertiary: var(--color-border);

    /* Component-specific */
    --card-bg: var(--color-surface);
    --card-border: var(--color-border);
    --card-shadow: var(--shadow-sm);

    --input-bg: var(--color-surface);
    --input-border: var(--color-border);
    --input-focus-ring: var(--primary-500);

    --nav-bg: var(--color-bg-elevated);
    --nav-item-hover: var(--color-surface-hover);
    --nav-item-active: var(--primary-50);

    /* Grain overlay */
    --grain-opacity: 0.03;
}

/* --------------------------------------------------------------------------
   Dark Theme
   -------------------------------------------------------------------------- */

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --color-bg: #0c0a09;
        --color-bg-elevated: #1c1917;
        --color-bg-sunken: #0a0908;
        --color-bg-overlay: rgba(0, 0, 0, 0.7);

        --color-surface: #1c1917;
        --color-surface-hover: #292524;
        --color-surface-active: #44403c;

        --color-border: #292524;
        --color-border-subtle: #1c1917;
        --color-border-strong: #44403c;

        --color-text: #fafaf9;
        --color-text-secondary: #d6d3d1;
        --color-text-muted: #a8a29e;
        --color-text-placeholder: #78716c;
        --color-text-inverse: #1c1917;

        --color-primary: var(--primary-400);
        --color-primary-hover: var(--primary-300);
        --color-primary-subtle: rgba(13, 148, 136, 0.15);

        --color-link: var(--primary-400);
        --color-link-hover: var(--primary-300);

        /* Semantic background aliases (for template compatibility) */
        --color-bg-primary: var(--color-bg);
        --color-bg-secondary: var(--color-bg-sunken);
        --color-bg-tertiary: var(--color-border);

        --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);

        --nav-item-active: rgba(13, 148, 136, 0.2);

        --shadow-glow: 0 0 30px rgba(45, 212, 191, 0.1);

        --grain-opacity: 0.04;
    }
}

[data-theme="dark"] {
    --color-bg: #0c0a09;
    --color-bg-elevated: #1c1917;
    --color-bg-sunken: #0a0908;
    --color-bg-overlay: rgba(0, 0, 0, 0.7);

    --color-surface: #1c1917;
    --color-surface-hover: #292524;
    --color-surface-active: #44403c;

    --color-border: #292524;
    --color-border-subtle: #1c1917;
    --color-border-strong: #44403c;

    --color-text: #fafaf9;
    --color-text-secondary: #d6d3d1;
    --color-text-muted: #a8a29e;
    --color-text-placeholder: #78716c;
    --color-text-inverse: #1c1917;

    --color-primary: var(--primary-400);
    --color-primary-hover: var(--primary-300);
    --color-primary-subtle: rgba(13, 148, 136, 0.15);

    --color-link: var(--primary-400);
    --color-link-hover: var(--primary-300);

    /* Semantic background aliases (for template compatibility) */
    --color-bg-primary: var(--color-bg);
    --color-bg-secondary: var(--color-bg-sunken);
    --color-bg-tertiary: var(--color-border);

    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);

    --nav-item-active: rgba(13, 148, 136, 0.2);

    --shadow-glow: 0 0 30px rgba(45, 212, 191, 0.1);

    --grain-opacity: 0.04;
}

/* --------------------------------------------------------------------------
   Base Styles
   -------------------------------------------------------------------------- */

*, *::before, *::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    min-height: 100vh;
    margin: 0;
    transition: background-color var(--transition-slow), color var(--transition-slow);
}

/* Grain texture overlay */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    opacity: var(--grain-opacity);
    pointer-events: none;
    z-index: 9999;
}

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.25;
    margin: 0 0 var(--space-4);
    color: var(--color-text);
    letter-spacing: -0.02em;
}

h1 { font-size: var(--text-4xl); font-weight: 700; }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); font-weight: 600; }

p {
    margin: 0 0 var(--space-4);
}

a {
    color: var(--color-link);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-link-hover);
}

code, pre {
    font-family: var(--font-mono);
    font-size: 0.9em;
}

code {
    background: var(--color-bg-sunken);
    padding: 0.125em 0.375em;
    border-radius: var(--radius-sm);
    color: var(--primary-600);
}

[data-theme="dark"] code,
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) code {
        color: var(--primary-400);
    }
}

/* --------------------------------------------------------------------------
   Layout - App Shell
   -------------------------------------------------------------------------- */

.app-layout {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    background: var(--nav-bg);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    z-index: var(--z-fixed);
    transition: transform var(--transition-base), width var(--transition-base);
}

.sidebar-header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    padding: 0 var(--space-5);
    border-bottom: 1px solid var(--color-border);
    gap: var(--space-3);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: var(--text-lg);
    color: var(--color-text);
}

.sidebar-logo svg,
.sidebar-logo img {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-4);
}

.nav-section {
    margin-bottom: var(--space-6);
}

.nav-section-title {
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    padding: var(--space-2) var(--space-3);
    margin-bottom: var(--space-1);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-3);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    font-weight: 500;
    transition: all var(--transition-fast);
    cursor: pointer;
    text-decoration: none;
}

.nav-item:hover {
    background: var(--nav-item-hover);
    color: var(--color-text);
}

.nav-item.active {
    background: var(--nav-item-active);
    color: var(--color-primary);
}

.nav-item-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.nav-item-badge {
    margin-left: auto;
    font-size: var(--text-xs);
    background: var(--color-primary);
    color: var(--color-text-inverse);
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-full);
    font-weight: 600;
}

/* Sidebar Footer */
.sidebar-footer {
    padding: var(--space-4);
    border-top: 1px solid var(--color-border);
}

.user-menu {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.user-menu:hover {
    background: var(--nav-item-hover);
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    background: var(--primary-100);
    color: var(--primary-700);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: var(--text-sm);
    flex-shrink: 0;
}

[data-theme="dark"] .user-avatar {
    background: var(--primary-900);
    color: var(--primary-300);
}

.user-info {
    flex: 1;
    min-width: 0;
}

.user-name {
    font-weight: 600;
    font-size: var(--text-sm);
    color: var(--color-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-tier {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.main-header {
    height: var(--header-height);
    background: var(--nav-bg);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    padding: 0 var(--space-6);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    gap: var(--space-4);
}

.main-body {
    flex: 1;
    padding: var(--space-6);
    max-width: var(--container-max);
    width: 100%;
    margin: 0 auto;
}

/* --------------------------------------------------------------------------
   Components - Buttons
   -------------------------------------------------------------------------- */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: 600;
    line-height: 1;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    text-decoration: none;
}

.btn:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.btn-primary {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.btn-primary:hover {
    background: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
    color: white;
}

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text);
    border-color: var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-surface-hover);
    border-color: var(--color-border-strong);
    color: var(--color-text);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
    border-color: transparent;
}

.btn-ghost:hover {
    background: var(--color-surface-hover);
    color: var(--color-text);
}

.btn-danger {
    background: var(--error-600);
    color: white;
    border-color: var(--error-600);
}

.btn-danger:hover {
    background: var(--error-700);
    border-color: var(--error-700);
}

.btn-sm {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-xs);
}

.btn-lg {
    padding: var(--space-4) var(--space-6);
    font-size: var(--text-base);
}

.btn-icon {
    padding: var(--space-2);
    width: 36px;
    height: 36px;
}

.btn-icon.btn-sm {
    width: 28px;
    height: 28px;
}

/* --------------------------------------------------------------------------
   Components - Cards
   -------------------------------------------------------------------------- */

.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow);
    transition: all var(--transition-base);
}

.card-hover:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.card-header {
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
}

.card-body {
    padding: var(--space-5);
}

.card-footer {
    padding: var(--space-4) var(--space-5);
    border-top: 1px solid var(--color-border);
    background: var(--color-bg-sunken);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.card-img-top {
    width: 100%;
    border-top-left-radius: var(--radius-lg);
    border-top-right-radius: var(--radius-lg);
}

/* --------------------------------------------------------------------------
   Components - Item Grid (Masonry-inspired)
   -------------------------------------------------------------------------- */

.items-toolbar {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
    flex-wrap: wrap;
}

.search-input {
    flex: 1;
    min-width: 200px;
    max-width: 400px;
    position: relative;
}

.search-input input {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    padding-left: calc(var(--space-4) + 20px);
    font-family: var(--font-body);
    font-size: var(--text-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--input-bg);
    color: var(--color-text);
    transition: all var(--transition-fast);
}

.search-input input:focus {
    outline: none;
    border-color: var(--input-focus-ring);
    box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.1);
}

.search-input::before {
    content: '';
    position: absolute;
    left: var(--space-4);
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2378716c'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M21 21l-6-6m2-5a7 7 0 11-14 0 7 7 0 0114 0z'/%3E%3C/svg%3E");
    background-size: contain;
    pointer-events: none;
}

.view-toggle {
    display: flex;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.view-toggle button {
    padding: var(--space-2) var(--space-3);
    border: none;
    background: transparent;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.view-toggle button:hover {
    color: var(--color-text);
    background: var(--color-surface-hover);
}

.view-toggle button.active {
    background: var(--color-primary);
    color: white;
}

.filter-chips {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.chip {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-xs);
    font-weight: 500;
    border-radius: var(--radius-full);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.chip:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.chip.active {
    background: var(--color-primary-subtle);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* Item Grid */
.items-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-5);
}

.items-grid.compact {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--space-4);
}

.items-grid.list {
    grid-template-columns: 1fr;
    gap: var(--space-3);
}

/* Item Card */
.item-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
    cursor: pointer;
}

.item-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
    border-color: var(--color-primary);
}

.item-card-image {
    aspect-ratio: 4/3;
    overflow: hidden;
    position: relative;
    background: var(--color-bg-sunken);
}

.item-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.item-card:hover .item-card-image img {
    transform: scale(1.05);
}

.item-card-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-placeholder);
}

.item-card-badge {
    position: absolute;
    top: var(--space-3);
    right: var(--space-3);
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
    background: rgba(0, 0, 0, 0.6);
    color: white;
    backdrop-filter: blur(4px);
}

.item-card-content {
    padding: var(--space-4);
}

.item-card-title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: var(--text-base);
    color: var(--color-text);
    margin-bottom: var(--space-2);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.item-card-meta {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--space-3);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.item-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.item-card-value {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: var(--text-lg);
    color: var(--success-600);
}

[data-theme="dark"] .item-card-value {
    color: var(--success-500);
}

.item-card-actions {
    display: flex;
    gap: var(--space-1);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.item-card:hover .item-card-actions {
    opacity: 1;
}

/* Compact Grid */
.items-grid.compact .item-card-content {
    padding: var(--space-3);
}

.items-grid.compact .item-card-title {
    font-size: var(--text-sm);
}

.items-grid.compact .item-card-meta {
    font-size: var(--text-xs);
}

.items-grid.compact .item-card-value {
    font-size: var(--text-base);
}

/* List View */
.items-grid.list .item-card {
    display: flex;
    align-items: center;
}

.items-grid.list .item-card-image {
    width: 100px;
    aspect-ratio: 1;
    flex-shrink: 0;
}

.items-grid.list .item-card-content {
    flex: 1;
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.items-grid.list .item-card-title {
    flex: 1;
    margin: 0;
}

.items-grid.list .item-card-meta {
    margin: 0;
    width: 150px;
}

.items-grid.list .item-card-footer {
    width: 180px;
}

.items-grid.list .item-card-actions {
    opacity: 1;
}

/* --------------------------------------------------------------------------
   Components - Stats Cards
   -------------------------------------------------------------------------- */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--stat-accent, var(--color-primary));
}

.stat-card-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-3);
    font-size: 20px;
}

.stat-card-icon.primary {
    background: var(--primary-100);
    color: var(--primary-700);
}

.stat-card-icon.success {
    background: var(--success-100);
    color: var(--success-700);
}

.stat-card-icon.warning {
    background: var(--warning-100);
    color: var(--warning-600);
}

[data-theme="dark"] .stat-card-icon.primary {
    background: rgba(13, 148, 136, 0.2);
    color: var(--primary-400);
}

[data-theme="dark"] .stat-card-icon.success {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success-500);
}

[data-theme="dark"] .stat-card-icon.warning {
    background: rgba(245, 158, 11, 0.2);
    color: var(--warning-500);
}

.stat-card-value {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: 700;
    color: var(--color-text);
    line-height: 1;
    margin-bottom: var(--space-1);
}

.stat-card-label {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

.stat-card-change {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    font-size: var(--text-xs);
    font-weight: 600;
    margin-top: var(--space-2);
}

.stat-card-change.positive {
    color: var(--success-600);
}

.stat-card-change.negative {
    color: var(--error-600);
}

/* --------------------------------------------------------------------------
   Components - Forms
   -------------------------------------------------------------------------- */

.form-group {
    margin-bottom: var(--space-5);
}

.form-label {
    display: block;
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-2);
}

.form-label-optional {
    font-weight: 400;
    color: var(--color-text-muted);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-family: var(--font-body);
    font-size: var(--text-base);
    border: 1px solid var(--input-border);
    border-radius: var(--radius-md);
    background: var(--input-bg);
    color: var(--color-text);
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--input-focus-ring);
    box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--color-text-placeholder);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.form-hint {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-top: var(--space-2);
}

.form-error {
    font-size: var(--text-sm);
    color: var(--error-600);
    margin-top: var(--space-2);
}

/* Checkbox & Radio */
.form-check {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    cursor: pointer;
}

.form-check-input {
    width: 18px;
    height: 18px;
    accent-color: var(--color-primary);
    cursor: pointer;
}

.form-check-label {
    font-size: var(--text-sm);
    color: var(--color-text);
    cursor: pointer;
}

/* --------------------------------------------------------------------------
   Components - Badges & Pills
   -------------------------------------------------------------------------- */

.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.badge-primary {
    background: var(--primary-100);
    color: var(--primary-800);
}

.badge-success {
    background: var(--success-100);
    color: var(--success-700);
}

.badge-warning {
    background: var(--warning-100);
    color: var(--warning-700);
}

.badge-error {
    background: var(--error-100);
    color: var(--error-700);
}

.badge-neutral {
    background: var(--neutral-100);
    color: var(--neutral-700);
}

[data-theme="dark"] .badge-primary {
    background: rgba(13, 148, 136, 0.2);
    color: var(--primary-300);
}

[data-theme="dark"] .badge-success {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success-500);
}

[data-theme="dark"] .badge-warning {
    background: rgba(245, 158, 11, 0.2);
    color: var(--warning-400);
}

[data-theme="dark"] .badge-error {
    background: rgba(244, 63, 94, 0.2);
    color: var(--error-500);
}

[data-theme="dark"] .badge-neutral {
    background: var(--neutral-800);
    color: var(--neutral-300);
}

/* Condition Badges */
.condition-excellent {
    background: var(--success-100);
    color: var(--success-700);
}

.condition-good {
    background: var(--primary-100);
    color: var(--primary-700);
}

.condition-fair {
    background: var(--warning-100);
    color: var(--warning-700);
}

.condition-poor {
    background: var(--error-100);
    color: var(--error-700);
}

/* --------------------------------------------------------------------------
   Components - Toast / Flash Messages
   -------------------------------------------------------------------------- */

.toast-container {
    position: fixed;
    top: var(--space-6);
    right: var(--space-6);
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    max-width: 400px;
}

.toast {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    animation: toast-in 0.3s ease-out;
}

@keyframes toast-in {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.toast-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 600;
    font-size: var(--text-sm);
    margin-bottom: var(--space-1);
}

.toast-message {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

.toast-close {
    padding: var(--space-1);
    background: none;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: color var(--transition-fast);
}

.toast-close:hover {
    color: var(--color-text);
}

.toast-success { border-left: 3px solid var(--success-500); }
.toast-warning { border-left: 3px solid var(--warning-500); }
.toast-error { border-left: 3px solid var(--error-500); }
.toast-info { border-left: 3px solid var(--primary-500); }

/* --------------------------------------------------------------------------
   Components - Dropdown Menu
   -------------------------------------------------------------------------- */

.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + var(--space-2));
    right: 0;
    min-width: 200px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: var(--space-2);
    z-index: var(--z-dropdown);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all var(--transition-fast);
}

.dropdown.open .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    font-size: var(--text-sm);
    color: var(--color-text);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.dropdown-item:hover {
    background: var(--color-surface-hover);
}

.dropdown-item-icon {
    width: 16px;
    height: 16px;
    color: var(--color-text-muted);
}

.dropdown-divider {
    height: 1px;
    background: var(--color-border);
    margin: var(--space-2) 0;
}

/* --------------------------------------------------------------------------
   Components - Pagination
   -------------------------------------------------------------------------- */

.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-1);
    margin-top: var(--space-8);
}

.pagination-item {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 var(--space-3);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.pagination-item:hover {
    background: var(--color-surface-hover);
    border-color: var(--color-border-strong);
    color: var(--color-text);
}

.pagination-item.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

.pagination-item.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

.pagination-ellipsis {
    padding: 0 var(--space-2);
    color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Components - Empty State
   -------------------------------------------------------------------------- */

.empty-state {
    text-align: center;
    padding: var(--space-16) var(--space-6);
}

.empty-state-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-6);
    background: var(--color-bg-sunken);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-placeholder);
    font-size: 32px;
}

.empty-state-title {
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    font-weight: 600;
    margin-bottom: var(--space-3);
}

.empty-state-description {
    color: var(--color-text-muted);
    max-width: 400px;
    margin: 0 auto var(--space-6);
}

/* --------------------------------------------------------------------------
   Components - Theme Toggle
   -------------------------------------------------------------------------- */

.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--color-surface-hover);
    color: var(--color-text);
}

.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }

[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .theme-toggle .icon-sun { display: block; }
    :root:not([data-theme="light"]) .theme-toggle .icon-moon { display: none; }
}

/* --------------------------------------------------------------------------
   Utilities
   -------------------------------------------------------------------------- */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-muted { color: var(--color-text-muted); }
.text-success { color: var(--success-600); }
.text-warning { color: var(--warning-600); }
.text-error { color: var(--error-600); }

.bg-primary { background: var(--color-primary); }
.bg-surface { background: var(--color-surface); }
.bg-sunken { background: var(--color-bg-sunken); }

.truncate {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Flexbox utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }

/* Bootstrap-compatible utilities */
.d-flex { display: flex !important; }
.d-inline { display: inline !important; }
.d-inline-flex { display: inline-flex !important; }
.d-block { display: block !important; }
.d-none { display: none !important; }
.flex-wrap { flex-wrap: wrap !important; }
.flex-column { flex-direction: column !important; }
.justify-content-between { justify-content: space-between !important; }
.justify-content-center { justify-content: center !important; }
.justify-content-end { justify-content: flex-end !important; }
.justify-content-start { justify-content: flex-start !important; }
.align-items-center { align-items: center !important; }
.align-items-start { align-items: flex-start !important; }
.align-items-end { align-items: flex-end !important; }

/* Spacing utilities */
.m-0 { margin: 0 !important; }
.m-1 { margin: var(--space-1) !important; }
.m-2 { margin: var(--space-2) !important; }
.m-3 { margin: var(--space-3) !important; }
.m-4 { margin: var(--space-4) !important; }

.mb-0 { margin-bottom: 0 !important; }
.mb-1 { margin-bottom: var(--space-1) !important; }
.mb-2 { margin-bottom: var(--space-2) !important; }
.mb-3 { margin-bottom: var(--space-3) !important; }
.mb-4 { margin-bottom: var(--space-4) !important; }
.mb-5 { margin-bottom: var(--space-5) !important; }

.mt-0 { margin-top: 0 !important; }
.mt-1 { margin-top: var(--space-1) !important; }
.mt-2 { margin-top: var(--space-2) !important; }
.mt-3 { margin-top: var(--space-3) !important; }
.mt-4 { margin-top: var(--space-4) !important; }
.mt-5 { margin-top: var(--space-5) !important; }

.ms-auto { margin-left: auto !important; }
.me-auto { margin-right: auto !important; }
.mx-auto { margin-left: auto !important; margin-right: auto !important; }

.p-0 { padding: 0 !important; }
.p-1 { padding: var(--space-1) !important; }
.p-2 { padding: var(--space-2) !important; }
.p-3 { padding: var(--space-3) !important; }
.p-4 { padding: var(--space-4) !important; }
.p-5 { padding: var(--space-5) !important; }

.py-3 { padding-top: var(--space-3) !important; padding-bottom: var(--space-3) !important; }
.py-4 { padding-top: var(--space-4) !important; padding-bottom: var(--space-4) !important; }
.py-5 { padding-top: var(--space-5) !important; padding-bottom: var(--space-5) !important; }

.px-2 { padding-left: var(--space-2) !important; padding-right: var(--space-2) !important; }
.px-3 { padding-left: var(--space-3) !important; padding-right: var(--space-3) !important; }
.px-4 { padding-left: var(--space-4) !important; padding-right: var(--space-4) !important; }

/* Width and Height utilities */
.w-100 { width: 100% !important; }
.h-100 { height: 100% !important; }

/* Text utilities */
.text-center { text-align: center !important; }
.text-end { text-align: right !important; }
.text-start { text-align: left !important; }
.text-decoration-none { text-decoration: none !important; }
.text-truncate {
    overflow: hidden !important;
    text-overflow: ellipsis !important;
    white-space: nowrap !important;
}

/* Font utilities */
.fw-medium { font-weight: 500 !important; }
.fw-bold { font-weight: 700 !important; }
.small { font-size: var(--text-sm) !important; }

/* Float utilities */
.float-end { float: right !important; }
.float-start { float: left !important; }

/* Visibility */
.visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

/* --------------------------------------------------------------------------
   Bootstrap-compatible Grid System
   -------------------------------------------------------------------------- */

.container {
    width: 100%;
    max-width: var(--container-max);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--space-4);
    padding-right: var(--space-4);
}

.row {
    display: flex;
    flex-wrap: wrap;
    margin-left: calc(var(--space-4) * -0.5);
    margin-right: calc(var(--space-4) * -0.5);
}

.row > * {
    flex-shrink: 0;
    width: 100%;
    max-width: 100%;
    padding-left: calc(var(--space-4) * 0.5);
    padding-right: calc(var(--space-4) * 0.5);
}

.g-2 { --gutter-x: var(--space-2); --gutter-y: var(--space-2); }
.g-3 { --gutter-x: var(--space-3); --gutter-y: var(--space-3); }
.g-4 { --gutter-x: var(--space-4); --gutter-y: var(--space-4); }

.row.g-2, .row.g-3, .row.g-4 {
    margin-left: calc(var(--gutter-x, var(--space-4)) * -0.5);
    margin-right: calc(var(--gutter-x, var(--space-4)) * -0.5);
    margin-top: calc(var(--gutter-y, 0) * -1);
}

.row.g-2 > *, .row.g-3 > *, .row.g-4 > * {
    padding-left: calc(var(--gutter-x, var(--space-4)) * 0.5);
    padding-right: calc(var(--gutter-x, var(--space-4)) * 0.5);
    margin-top: var(--gutter-y, 0);
}

/* Column classes */
.col { flex: 1 0 0%; }
.col-auto { flex: 0 0 auto; width: auto; }
.col-1 { flex: 0 0 auto; width: 8.333333%; }
.col-2 { flex: 0 0 auto; width: 16.666667%; }
.col-3 { flex: 0 0 auto; width: 25%; }
.col-4 { flex: 0 0 auto; width: 33.333333%; }
.col-5 { flex: 0 0 auto; width: 41.666667%; }
.col-6 { flex: 0 0 auto; width: 50%; }
.col-7 { flex: 0 0 auto; width: 58.333333%; }
.col-8 { flex: 0 0 auto; width: 66.666667%; }
.col-9 { flex: 0 0 auto; width: 75%; }
.col-10 { flex: 0 0 auto; width: 83.333333%; }
.col-11 { flex: 0 0 auto; width: 91.666667%; }
.col-12 { flex: 0 0 auto; width: 100%; }

/* Medium breakpoint (768px) */
@media (min-width: 768px) {
    .col-md-1 { flex: 0 0 auto; width: 8.333333%; }
    .col-md-2 { flex: 0 0 auto; width: 16.666667%; }
    .col-md-3 { flex: 0 0 auto; width: 25%; }
    .col-md-4 { flex: 0 0 auto; width: 33.333333%; }
    .col-md-5 { flex: 0 0 auto; width: 41.666667%; }
    .col-md-6 { flex: 0 0 auto; width: 50%; }
    .col-md-7 { flex: 0 0 auto; width: 58.333333%; }
    .col-md-8 { flex: 0 0 auto; width: 66.666667%; }
    .col-md-9 { flex: 0 0 auto; width: 75%; }
    .col-md-10 { flex: 0 0 auto; width: 83.333333%; }
    .col-md-11 { flex: 0 0 auto; width: 91.666667%; }
    .col-md-12 { flex: 0 0 auto; width: 100%; }
}

/* Large breakpoint (992px) */
@media (min-width: 992px) {
    .col-lg-1 { flex: 0 0 auto; width: 8.333333%; }
    .col-lg-2 { flex: 0 0 auto; width: 16.666667%; }
    .col-lg-3 { flex: 0 0 auto; width: 25%; }
    .col-lg-4 { flex: 0 0 auto; width: 33.333333%; }
    .col-lg-5 { flex: 0 0 auto; width: 41.666667%; }
    .col-lg-6 { flex: 0 0 auto; width: 50%; }
    .col-lg-7 { flex: 0 0 auto; width: 58.333333%; }
    .col-lg-8 { flex: 0 0 auto; width: 66.666667%; }
    .col-lg-9 { flex: 0 0 auto; width: 75%; }
    .col-lg-10 { flex: 0 0 auto; width: 83.333333%; }
    .col-lg-11 { flex: 0 0 auto; width: 91.666667%; }
    .col-lg-12 { flex: 0 0 auto; width: 100%; }
}

/* --------------------------------------------------------------------------
   Bootstrap-compatible Tables
   -------------------------------------------------------------------------- */

.table {
    width: 100%;
    margin-bottom: var(--space-4);
    vertical-align: top;
    border-color: var(--color-border);
}

.table > :not(caption) > * > * {
    padding: var(--space-3) var(--space-4);
    background-color: transparent;
    border-bottom: 1px solid var(--color-border);
}

.table > thead {
    vertical-align: bottom;
}

.table > thead > tr > th {
    font-weight: 600;
    color: var(--color-text);
    text-align: left;
    font-size: var(--text-sm);
}

.table > tbody > tr > td {
    color: var(--color-text-secondary);
}

.table-sm > :not(caption) > * > * {
    padding: var(--space-2) var(--space-3);
}

.table-hover > tbody > tr:hover > * {
    background-color: var(--color-surface-hover);
}

.table-borderless > :not(caption) > * > * {
    border-bottom-width: 0;
}

.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

/* --------------------------------------------------------------------------
   Bootstrap-compatible Progress Bars
   -------------------------------------------------------------------------- */

.progress {
    display: flex;
    height: 0.75rem;
    overflow: hidden;
    font-size: var(--text-xs);
    background-color: var(--color-bg-sunken);
    border-radius: var(--radius-full);
}

.progress-bar {
    display: flex;
    flex-direction: column;
    justify-content: center;
    overflow: hidden;
    color: white;
    text-align: center;
    white-space: nowrap;
    background-color: var(--color-primary);
    transition: width var(--transition-slow);
}

/* --------------------------------------------------------------------------
   Bootstrap-compatible Background Colors
   -------------------------------------------------------------------------- */

.bg-primary { background-color: var(--primary-600) !important; }
.bg-secondary { background-color: var(--neutral-500) !important; }
.bg-success { background-color: var(--success-600) !important; }
.bg-danger { background-color: var(--error-600) !important; }
.bg-warning {
    background-color: var(--warning-500) !important;
    color: var(--neutral-900) !important;
}
.bg-info { background-color: var(--primary-500) !important; }
.bg-light {
    background-color: var(--neutral-100) !important;
    color: var(--neutral-800) !important;
}
.bg-dark {
    background-color: var(--neutral-800) !important;
    color: var(--neutral-100) !important;
}
.bg-white { background-color: white !important; }

[data-theme="dark"] .bg-light {
    background-color: var(--neutral-800) !important;
    color: var(--neutral-200) !important;
}

/* Text colors to match backgrounds */
.text-white { color: white !important; }
.text-dark { color: var(--neutral-900) !important; }

/* --------------------------------------------------------------------------
   Bootstrap-compatible Buttons (additions)
   -------------------------------------------------------------------------- */

.btn-outline-primary {
    color: var(--color-primary);
    border-color: var(--color-primary);
    background: transparent;
}
.btn-outline-primary:hover {
    background: var(--color-primary);
    color: white;
}

.btn-outline-secondary {
    color: var(--color-text-secondary);
    border-color: var(--color-border);
    background: transparent;
}
.btn-outline-secondary:hover {
    background: var(--color-surface-hover);
    border-color: var(--color-border-strong);
    color: var(--color-text);
}

.btn-outline-success {
    color: var(--success-600);
    border-color: var(--success-600);
    background: transparent;
}
.btn-outline-success:hover {
    background: var(--success-600);
    color: white;
}

.btn-outline-danger {
    color: var(--error-600);
    border-color: var(--error-600);
    background: transparent;
}
.btn-outline-danger:hover {
    background: var(--error-600);
    color: white;
}

.btn-link {
    color: var(--color-link);
    background: transparent;
    border-color: transparent;
    text-decoration: underline;
}
.btn-link:hover {
    color: var(--color-link-hover);
    background: transparent;
}

/* --------------------------------------------------------------------------
   Bootstrap-compatible Badges (additions)
   -------------------------------------------------------------------------- */

.badge.bg-primary { background-color: var(--primary-600) !important; color: white !important; }
.badge.bg-secondary { background-color: var(--neutral-500) !important; color: white !important; }
.badge.bg-success { background-color: var(--success-600) !important; color: white !important; }
.badge.bg-danger { background-color: var(--error-600) !important; color: white !important; }
.badge.bg-warning { background-color: var(--warning-500) !important; color: var(--neutral-900) !important; }
.badge.bg-info { background-color: var(--primary-500) !important; color: white !important; }
.badge.rounded-pill { border-radius: var(--radius-full); }

/* --------------------------------------------------------------------------
   Bootstrap-compatible List Groups
   -------------------------------------------------------------------------- */

.list-group {
    display: flex;
    flex-direction: column;
    padding-left: 0;
    margin-bottom: 0;
    border-radius: var(--radius-lg);
}

.list-group-item {
    position: relative;
    display: block;
    padding: var(--space-3) var(--space-4);
    color: var(--color-text);
    text-decoration: none;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-width: 0 0 1px 0;
}

.list-group-item:first-child {
    border-top-left-radius: inherit;
    border-top-right-radius: inherit;
}

.list-group-item:last-child {
    border-bottom: none;
    border-bottom-right-radius: inherit;
    border-bottom-left-radius: inherit;
}

.list-group-item-action {
    width: 100%;
    text-align: inherit;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.list-group-item-action:hover {
    background-color: var(--color-surface-hover);
}

.list-group-flush {
    border-radius: 0;
}

.list-group-flush > .list-group-item {
    border-width: 0 0 1px 0;
}

.list-group-flush > .list-group-item:last-child {
    border-bottom-width: 0;
}

/* --------------------------------------------------------------------------
   Bootstrap-compatible Breadcrumb
   -------------------------------------------------------------------------- */

.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    padding: 0;
    margin-bottom: var(--space-4);
    list-style: none;
    font-size: var(--text-sm);
}

.breadcrumb-item + .breadcrumb-item {
    padding-left: var(--space-2);
}

.breadcrumb-item + .breadcrumb-item::before {
    content: "/";
    float: left;
    padding-right: var(--space-2);
    color: var(--color-text-muted);
}

.breadcrumb-item.active {
    color: var(--color-text-muted);
}

.breadcrumb-item a {
    color: var(--color-link);
    text-decoration: none;
}

.breadcrumb-item a:hover {
    color: var(--color-link-hover);
    text-decoration: underline;
}

/* --------------------------------------------------------------------------
   Bootstrap-compatible Input Group
   -------------------------------------------------------------------------- */

.input-group {
    position: relative;
    display: flex;
    flex-wrap: wrap;
    align-items: stretch;
    width: 100%;
}

.input-group > .form-control {
    position: relative;
    flex: 1 1 auto;
    width: 1%;
    min-width: 0;
}

.input-group-text {
    display: flex;
    align-items: center;
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-base);
    font-weight: 400;
    line-height: 1.5;
    color: var(--color-text-secondary);
    text-align: center;
    white-space: nowrap;
    background-color: var(--color-bg-sunken);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.input-group > :not(:first-child) {
    margin-left: -1px;
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

.input-group > :not(:last-child) {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

.form-control {
    display: block;
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-family: var(--font-body);
    font-size: var(--text-base);
    font-weight: 400;
    line-height: 1.5;
    color: var(--color-text);
    background-color: var(--input-bg);
    background-clip: padding-box;
    border: 1px solid var(--input-border);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
    border-color: var(--input-focus-ring);
    outline: 0;
    box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.1);
}

.form-select {
    display: block;
    width: 100%;
    padding: var(--space-3) var(--space-8) var(--space-3) var(--space-4);
    font-family: var(--font-body);
    font-size: var(--text-base);
    font-weight: 400;
    line-height: 1.5;
    color: var(--color-text);
    background-color: var(--input-bg);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%2378716c' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right var(--space-3) center;
    background-size: 16px 12px;
    border: 1px solid var(--input-border);
    border-radius: var(--radius-md);
    appearance: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-select:focus {
    border-color: var(--input-focus-ring);
    outline: 0;
    box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.1);
}

.form-text {
    display: block;
    margin-top: var(--space-2);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

.lead {
    font-size: var(--text-lg);
    font-weight: 400;
    color: var(--color-text-secondary);
}

/* --------------------------------------------------------------------------
   Bootstrap-compatible Modals
   -------------------------------------------------------------------------- */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    z-index: var(--z-modal);
    display: none;
    width: 100%;
    height: 100%;
    overflow-x: hidden;
    overflow-y: auto;
    outline: 0;
}

.modal.show {
    display: block;
}

.modal-dialog {
    position: relative;
    width: auto;
    margin: var(--space-8) auto;
    pointer-events: none;
    max-width: 500px;
}

.modal-dialog.modal-lg {
    max-width: 800px;
}

.modal-content {
    position: relative;
    display: flex;
    flex-direction: column;
    width: 100%;
    pointer-events: auto;
    background-color: var(--color-surface);
    background-clip: padding-box;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    outline: 0;
}

.modal-header {
    display: flex;
    flex-shrink: 0;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--color-border);
    border-top-left-radius: var(--radius-lg);
    border-top-right-radius: var(--radius-lg);
}

.modal-title {
    margin-bottom: 0;
    line-height: 1.5;
    font-size: var(--text-xl);
    font-weight: 600;
}

.modal-body {
    position: relative;
    flex: 1 1 auto;
    padding: var(--space-5);
}

.modal-footer {
    display: flex;
    flex-shrink: 0;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-end;
    padding: var(--space-4) var(--space-5);
    border-top: 1px solid var(--color-border);
    border-bottom-right-radius: var(--radius-lg);
    border-bottom-left-radius: var(--radius-lg);
    gap: var(--space-2);
}

.btn-close {
    box-sizing: content-box;
    width: 1em;
    height: 1em;
    padding: var(--space-2);
    color: var(--color-text-muted);
    background: transparent url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%2378716c'%3e%3cpath d='M.293.293a1 1 0 0 1 1.414 0L8 6.586 14.293.293a1 1 0 1 1 1.414 1.414L9.414 8l6.293 6.293a1 1 0 0 1-1.414 1.414L8 9.414l-6.293 6.293a1 1 0 0 1-1.414-1.414L6.586 8 .293 1.707a1 1 0 0 1 0-1.414z'/%3e%3c/svg%3e") center/1em auto no-repeat;
    border: 0;
    border-radius: var(--radius-md);
    opacity: 0.5;
    cursor: pointer;
    transition: opacity var(--transition-fast);
}

.btn-close:hover {
    opacity: 1;
}

.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    z-index: calc(var(--z-modal) - 1);
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.5);
}

.modal.fade .modal-dialog {
    transition: transform var(--transition-base);
    transform: translateY(-50px);
}

.modal.show .modal-dialog {
    transform: none;
}

/* --------------------------------------------------------------------------
   Bootstrap-compatible Collapse
   -------------------------------------------------------------------------- */

.collapse:not(.show) {
    display: none;
}

.collapsing {
    height: 0;
    overflow: hidden;
    transition: height var(--transition-base);
}

/* --------------------------------------------------------------------------
   Bootstrap-compatible Carousel
   -------------------------------------------------------------------------- */

.carousel {
    position: relative;
}

.carousel-inner {
    position: relative;
    width: 100%;
    overflow: hidden;
}

.carousel-item {
    position: relative;
    display: none;
    float: left;
    width: 100%;
    margin-right: -100%;
    backface-visibility: hidden;
    transition: transform var(--transition-slow);
}

.carousel-item.active,
.carousel-item-next,
.carousel-item-prev {
    display: block;
}

.carousel-control-prev,
.carousel-control-next {
    position: absolute;
    top: 0;
    bottom: 0;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 15%;
    padding: 0;
    color: #fff;
    text-align: center;
    background: none;
    border: 0;
    opacity: 0.5;
    transition: opacity var(--transition-fast);
    cursor: pointer;
}

.carousel-control-prev {
    left: 0;
}

.carousel-control-next {
    right: 0;
}

.carousel-control-prev:hover,
.carousel-control-next:hover {
    opacity: 0.9;
}

.carousel-control-prev-icon,
.carousel-control-next-icon {
    display: inline-block;
    width: 2rem;
    height: 2rem;
    background-repeat: no-repeat;
    background-position: 50%;
    background-size: 100% 100%;
}

.carousel-control-prev-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23fff'%3e%3cpath d='M11.354 1.646a.5.5 0 0 1 0 .708L5.707 8l5.647 5.646a.5.5 0 0 1-.708.708l-6-6a.5.5 0 0 1 0-.708l6-6a.5.5 0 0 1 .708 0z'/%3e%3c/svg%3e");
}

.carousel-control-next-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23fff'%3e%3cpath d='M4.646 1.646a.5.5 0 0 1 .708 0l6 6a.5.5 0 0 1 0 .708l-6 6a.5.5 0 0 1-.708-.708L10.293 8 4.646 2.354a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
}

/* --------------------------------------------------------------------------
   Bootstrap-compatible Pagination (additions)
   -------------------------------------------------------------------------- */

.page-item {
    display: inline-block;
}

.page-item.active .page-link {
    z-index: 3;
    color: #fff;
    background-color: var(--color-primary);
    border-color: var(--color-primary);
}

.page-item.disabled .page-link {
    color: var(--color-text-muted);
    pointer-events: none;
    background-color: var(--color-surface);
    border-color: var(--color-border);
}

.page-link {
    position: relative;
    display: block;
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
    color: var(--color-link);
    text-decoration: none;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    transition: all var(--transition-fast);
}

.page-link:hover {
    z-index: 2;
    color: var(--color-link-hover);
    background-color: var(--color-surface-hover);
    border-color: var(--color-border-strong);
}

.pagination {
    display: flex;
    padding-left: 0;
    list-style: none;
}

/* --------------------------------------------------------------------------
   Bootstrap-compatible Alerts
   -------------------------------------------------------------------------- */

.alert {
    position: relative;
    padding: var(--space-4);
    margin-bottom: var(--space-4);
    border: 1px solid transparent;
    border-radius: var(--radius-md);
}

.alert-success {
    color: var(--success-700);
    background-color: var(--success-50);
    border-color: var(--success-100);
}

.alert-danger {
    color: var(--error-700);
    background-color: var(--error-50);
    border-color: var(--error-100);
}

.alert-warning {
    color: var(--warning-700);
    background-color: var(--warning-50);
    border-color: var(--warning-100);
}

.alert-info {
    color: var(--primary-700);
    background-color: var(--primary-50);
    border-color: var(--primary-100);
}

[data-theme="dark"] .alert-success {
    color: var(--success-500);
    background-color: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.2);
}

[data-theme="dark"] .alert-danger {
    color: var(--error-500);
    background-color: rgba(244, 63, 94, 0.1);
    border-color: rgba(244, 63, 94, 0.2);
}

/* --------------------------------------------------------------------------
   Bootstrap-compatible Spinner
   -------------------------------------------------------------------------- */

.spinner-border {
    display: inline-block;
    width: 2rem;
    height: 2rem;
    vertical-align: -0.125em;
    border: 0.25em solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spinner-border 0.75s linear infinite;
}

.spinner-border-sm {
    width: 1rem;
    height: 1rem;
    border-width: 0.2em;
}

@keyframes spinner-border {
    to {
        transform: rotate(360deg);
    }
}

.text-primary .spinner-border,
.spinner-border.text-primary {
    color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   Additional Card Colors (border-primary etc)
   -------------------------------------------------------------------------- */

.border-primary {
    border-color: var(--primary-500) !important;
}

.border-success {
    border-color: var(--success-500) !important;
}

.border-danger {
    border-color: var(--error-500) !important;
}

.border-2 {
    border-width: 2px !important;
}

.border {
    border: 1px solid var(--color-border) !important;
}

.rounded {
    border-radius: var(--radius-md) !important;
}

.rounded-circle {
    border-radius: 50% !important;
}

/* Thumbnail styling */
.thumbnail-sm {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    border: 2px solid transparent;
    transition: border-color var(--transition-fast);
}

.thumbnail-sm:hover {
    border-color: var(--color-primary);
}

/* Shadow utility */
.shadow {
    box-shadow: var(--shadow-md) !important;
}

.shadow-sm {
    box-shadow: var(--shadow-sm) !important;
}

.shadow-lg {
    box-shadow: var(--shadow-lg) !important;
}

/* Cursor utility */
.cursor-pointer {
    cursor: pointer !important;
}

/* Info colors for badges/text */
.text-info { color: var(--info-600) !important; }
.bg-info { background-color: var(--info-500) !important; color: white !important; }
.badge.bg-info { background-color: var(--info-500) !important; color: white !important; }

[data-theme="dark"] .text-info { color: var(--info-500) !important; }

/* hr element styling */
hr {
    margin: var(--space-4) 0;
    border: 0;
    border-top: 1px solid var(--color-border);
}

/* Details/summary styling */
details summary {
    cursor: pointer;
    user-select: none;
}

details summary:focus {
    outline: none;
}

/* Cursor pointer for interactive elements */
[onclick],
[data-bs-toggle] {
    cursor: pointer;
}

/* --------------------------------------------------------------------------
   Responsive - Mobile
   -------------------------------------------------------------------------- */

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        width: 280px;
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
    }

    .main-header {
        padding: 0 var(--space-4);
    }

    .main-body {
        padding: var(--space-4);
    }

    .items-toolbar {
        flex-direction: column;
        align-items: stretch;
    }

    .search-input {
        max-width: none;
    }

    .items-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: var(--space-3);
    }

    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }

    .toast-container {
        left: var(--space-4);
        right: var(--space-4);
        max-width: none;
    }

    .mobile-menu-btn {
        display: flex !important;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .items-grid {
        grid-template-columns: 1fr;
    }
}

/* Mobile menu button - hidden on desktop */
.mobile-menu-btn {
    display: none;
}

/* Mobile overlay */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: var(--color-bg-overlay);
    z-index: calc(var(--z-fixed) - 1);
}

.sidebar-overlay.show {
    display: block;
}

/* --------------------------------------------------------------------------
   Animations
   -------------------------------------------------------------------------- */

@keyframes fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slide-up {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scale-in {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.animate-fade-in {
    animation: fade-in var(--transition-base) ease-out;
}

.animate-slide-up {
    animation: slide-up var(--transition-base) ease-out;
}

.animate-scale-in {
    animation: scale-in var(--transition-base) ease-out;
}

/* Staggered animation for grid items */
.items-grid .item-card {
    animation: slide-up 0.4s ease-out both;
}

.items-grid .item-card:nth-child(1) { animation-delay: 0ms; }
.items-grid .item-card:nth-child(2) { animation-delay: 50ms; }
.items-grid .item-card:nth-child(3) { animation-delay: 100ms; }
.items-grid .item-card:nth-child(4) { animation-delay: 150ms; }
.items-grid .item-card:nth-child(5) { animation-delay: 200ms; }
.items-grid .item-card:nth-child(6) { animation-delay: 250ms; }
.items-grid .item-card:nth-child(7) { animation-delay: 300ms; }
.items-grid .item-card:nth-child(8) { animation-delay: 350ms; }
.items-grid .item-card:nth-child(9) { animation-delay: 400ms; }
.items-grid .item-card:nth-child(10) { animation-delay: 450ms; }
.items-grid .item-card:nth-child(11) { animation-delay: 500ms; }
.items-grid .item-card:nth-child(12) { animation-delay: 550ms; }