/* ============================================
   Bookmark Vault - A distinctive, modern aesthetic
   Color Palette: Deep ocean teal + warm amber accents
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Bricolage+Grotesque:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
    /* Core palette - Deep ocean meets amber warmth */
    --bg-primary: #0a0f14;
    --bg-secondary: #111820;
    --bg-tertiary: #1a242f;
    --bg-card: #151d27;
    --bg-card-hover: #1c2633;

    /* Accent colors */
    --accent-primary: #00d4aa;
    --accent-secondary: #00b894;
    --accent-warm: #f6ad55;
    --accent-warm-dim: #c77d2e;

    /* Text colors */
    --text-primary: #e8f1f8;
    --text-secondary: #8fa3b8;
    --text-muted: #5a6f82;

    /* Borders and lines */
    --border-color: #243040;
    --border-hover: #344050;

    /* Shadows */
    --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 40px rgba(0, 212, 170, 0.1);

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    /* Typography */
    --font-display: 'Bricolage Grotesque', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;

    /* Border radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

/* ============== Reset & Base ============== */

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-display);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Animated background pattern */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 20% 20%, rgba(0, 212, 170, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(246, 173, 85, 0.05) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(0, 184, 148, 0.03) 0%, transparent 70%);
    pointer-events: none;
    z-index: -1;
}

/* ============== Layout ============== */

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

.sidebar {
    width: 260px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
}

.main-content {
    flex: 1;
    margin-left: 260px;
    padding: var(--space-2xl);
    max-width: 1200px;
}

/* ============== Logo & Branding ============== */

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-2xl);
    text-decoration: none;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: 0 4px 15px rgba(0, 212, 170, 0.3);
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

/* ============== Navigation ============== */

.nav-menu {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    font-weight: 500;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--accent-primary);
    transform: scaleY(0);
    transition: transform var(--transition-fast);
    border-radius: 0 3px 3px 0;
}

.nav-link:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.nav-link.active {
    background: var(--bg-tertiary);
    color: var(--accent-primary);
}

.nav-link.active::before {
    transform: scaleY(1);
}

.nav-icon {
    font-size: 1.1rem;
    width: 24px;
    text-align: center;
}

/* ============== Stats Cards ============== */

.stats-section {
    margin-top: auto;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border-color);
}

.stats-title {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: var(--space-md);
}

.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-sm);
}

.stat-card {
    background: var(--bg-tertiary);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    text-align: center;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-primary);
    font-family: var(--font-mono);
}

.stat-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ============== Page Headers ============== */

.page-header {
    margin-bottom: var(--space-2xl);
}

.page-title {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-sm);
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* ============== Search & Filters ============== */

.search-bar {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.search-input-wrapper {
    flex: 1;
    position: relative;
}

.search-input {
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    padding-left: 3rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-family: var(--font-display);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(0, 212, 170, 0.15);
}

.search-input::placeholder {
    color: var(--text-muted);
}

.search-icon {
    position: absolute;
    left: var(--space-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1.1rem;
}

.filter-btn {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-btn:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-hover);
    color: var(--text-primary);
}

.filter-btn.active {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: var(--bg-primary);
}

/* ============== Bookmark Cards ============== */

.bookmarks-grid {
    display: grid;
    gap: var(--space-md);
}

.bookmark-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.bookmark-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-warm));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

.bookmark-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-soft);
}

.bookmark-card:hover::before {
    transform: scaleX(1);
}

.bookmark-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--space-md);
    margin-bottom: var(--space-sm);
}

.bookmark-title {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.bookmark-title:hover {
    color: var(--accent-primary);
}

.bookmark-actions {
    display: flex;
    gap: var(--space-xs);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

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

.action-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.action-btn:hover {
    background: var(--accent-primary);
    color: var(--bg-primary);
}

.action-btn.delete:hover {
    background: #e74c3c;
    color: white;
}

.action-btn.favorite {
    color: var(--text-muted);
}

.action-btn.favorite.active {
    color: var(--accent-warm);
    opacity: 1;
}

.bookmark-url {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: var(--space-sm);
    text-overflow: ellipsis;
    overflow: hidden;
    white-space: nowrap;
}

.bookmark-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: var(--space-md);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.bookmark-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.tag {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.6rem;
    background: var(--bg-tertiary);
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--accent-primary);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.tag:hover {
    background: var(--accent-primary);
    color: var(--bg-primary);
}

/* ============== Forms ============== */

.form-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    max-width: 600px;
}

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

.form-label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: var(--space-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-display);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(0, 212, 170, 0.15);
}

.form-textarea {
    min-height: 100px;
    resize: vertical;
}

.form-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: var(--space-xs);
}

.checkbox-wrapper {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    cursor: pointer;
}

.checkbox-wrapper input[type="checkbox"] {
    appearance: none;
    width: 20px;
    height: 20px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

.checkbox-wrapper input[type="checkbox"]:checked {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
}

.checkbox-wrapper input[type="checkbox"]:checked::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--bg-primary);
    font-size: 0.75rem;
    font-weight: bold;
}

.checkbox-label {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* ============== Buttons ============== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: var(--bg-primary);
    box-shadow: 0 4px 15px rgba(0, 212, 170, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 212, 170, 0.4);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
}

/* ============== Tags Page ============== */

.tags-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.tag-chip {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 100px;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    text-decoration: none;
    transition: all var(--transition-base);
}

.tag-chip:hover {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: var(--bg-primary);
    transform: scale(1.05);
}

.tag-chip .tag-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 24px;
    height: 24px;
    padding: 0 var(--space-sm);
    background: rgba(255, 255, 255, 0.15);
    border-radius: 100px;
    font-size: 0.8rem;
    font-family: var(--font-mono);
}

/* ============== About Page ============== */

.about-section {
    margin-bottom: var(--space-2xl);
}

.about-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
}

.about-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
    color: var(--accent-primary);
}

.about-text {
    color: var(--text-secondary);
    line-height: 1.8;
}

.about-text p {
    margin-bottom: var(--space-md);
}

.tech-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--space-md);
    list-style: none;
    margin-top: var(--space-lg);
}

.tech-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    color: var(--text-primary);
}

.tech-icon {
    font-size: 1.5rem;
}

.api-endpoint {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-sm);
}

.api-method {
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    min-width: 60px;
    text-align: center;
}

.api-method.get { background: #27ae60; color: white; }
.api-method.post { background: #3498db; color: white; }
.api-method.put { background: #f39c12; color: white; }
.api-method.delete { background: #e74c3c; color: white; }

.api-path {
    font-family: var(--font-mono);
    color: var(--text-primary);
}

.api-desc {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-left: auto;
}

/* ============== Empty States ============== */

.empty-state {
    text-align: center;
    padding: var(--space-2xl);
    color: var(--text-muted);
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: var(--space-md);
    opacity: 0.5;
}

.empty-title {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

.empty-text {
    margin-bottom: var(--space-lg);
}

/* ============== Toast Notifications ============== */

.toast-container {
    position: fixed;
    bottom: var(--space-lg);
    right: var(--space-lg);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.toast {
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    box-shadow: var(--shadow-soft);
    animation: slideIn 0.3s ease;
}

.toast.success {
    border-color: var(--accent-primary);
    background: linear-gradient(135deg, rgba(0, 212, 170, 0.1), transparent);
}

.toast.error {
    border-color: #e74c3c;
    background: linear-gradient(135deg, rgba(231, 76, 60, 0.1), transparent);
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ============== Animations ============== */

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

.animate-in {
    animation: fadeIn 0.4s ease forwards;
}

.delay-1 { animation-delay: 0.1s; opacity: 0; }
.delay-2 { animation-delay: 0.2s; opacity: 0; }
.delay-3 { animation-delay: 0.3s; opacity: 0; }
.delay-4 { animation-delay: 0.4s; opacity: 0; }

/* ============== Responsive ============== */

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

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

    .main-content {
        margin-left: 0;
        padding: var(--space-lg);
    }

    .page-title {
        font-size: 1.75rem;
    }

    .search-bar {
        flex-direction: column;
    }

    .api-endpoint {
        flex-wrap: wrap;
    }

    .api-desc {
        margin-left: 0;
        margin-top: var(--space-xs);
        width: 100%;
    }
}