/*
 * Elite Writer Command Center - Professional Dark UI
 * Modern design inspired by ClickUp, Webflow, and Linear
 * Version: 3.0.0
 */

/* ============================================
   1. DESIGN TOKENS
   ============================================ */

:root {
    /* Color Palette - Dark Theme */
    --bg-primary: #0d0d0d;           /* Main background */
    --bg-secondary: #1a1a1a;         /* Elevated surfaces */
    --bg-tertiary: #242424;          /* Cards, panels */
    --bg-hover: #2a2a2a;             /* Hover states */
    --bg-active: #333333;            /* Active states */
    
    /* Text Colors */
    --text-primary: #ffffff;          /* Primary text */
    --text-secondary: #a1a1a1;        /* Secondary text */
    --text-tertiary: #6b6b6b;         /* Disabled/tertiary text */
    --text-inverse: #0d0d0d;          /* Text on light backgrounds */
    
    /* Accent Colors */
    --accent-primary: #7c3aed;        /* Purple - primary actions */
    --accent-primary-hover: #6d28d9;  /* Darker purple */
    --accent-secondary: #3b82f6;      /* Blue - secondary actions */
    --accent-secondary-hover: #2563eb;
    --accent-success: #10b981;        /* Green - success */
    --accent-warning: #f59e0b;        /* Yellow - warning */
    --accent-danger: #ef4444;         /* Red - danger/delete */
    --accent-info: #06b6d4;           /* Cyan - info */
    
    /* Gradient Accents */
    --gradient-primary: linear-gradient(135deg, #7c3aed 0%, #a855f7 100%);
    --gradient-secondary: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #34d399 100%);
    --gradient-surface: linear-gradient(135deg, #1a1a1a 0%, #242424 100%);
    
    /* Border Colors */
    --border-primary: #333333;        /* Primary borders */
    --border-secondary: #2a2a2a;      /* Secondary borders */
    --border-hover: #404040;          /* Hover borders */
    --border-focus: #7c3aed;          /* Focus borders */
    
    /* Shadows */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.4), 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.6), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.7), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.8);
    --shadow-glow: 0 0 20px rgba(124, 58, 237, 0.3);
    
    /* Spacing System (8px base) */
    --space-1: 0.25rem;  /* 4px */
    --space-2: 0.5rem;   /* 8px */
    --space-3: 0.75rem;  /* 12px */
    --space-4: 1rem;     /* 16px */
    --space-5: 1.25rem;  /* 20px */
    --space-6: 1.5rem;   /* 24px */
    --space-8: 2rem;     /* 32px */
    --space-10: 2.5rem;  /* 40px */
    --space-12: 3rem;    /* 48px */
    --space-16: 4rem;    /* 64px */
    --space-20: 5rem;    /* 80px */
    
    /* Border Radius */
    --radius-sm: 0.375rem;   /* 6px */
    --radius-md: 0.5rem;     /* 8px */
    --radius-lg: 0.75rem;    /* 12px */
    --radius-xl: 1rem;       /* 16px */
    --radius-2xl: 1.25rem;   /* 20px */
    --radius-full: 9999px;   /* Pill shape */
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'SF Mono', 'Monaco', 'Cascadia Code', 'Consolas', monospace;
    
    /* Font Sizes */
    --text-xs: 0.75rem;      /* 12px */
    --text-sm: 0.875rem;     /* 14px */
    --text-base: 1rem;       /* 16px */
    --text-lg: 1.125rem;     /* 18px */
    --text-xl: 1.25rem;      /* 20px */
    --text-2xl: 1.5rem;      /* 24px */
    --text-3xl: 1.875rem;    /* 30px */
    --text-4xl: 2.25rem;     /* 36px */
    
    /* Font Weights */
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    --font-extrabold: 800;
    
    /* Line Heights */
    --leading-tight: 1.25;
    --leading-snug: 1.375;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    
    /* Layout Dimensions */
    --sidebar-width: 280px;
    --topbar-height: 64px;
    --content-max-width: 1400px;
    
    /* 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);
    
    /* Z-Index Scale */
    --z-base: 0;
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* Light theme override (Cursor/ClickUp-like) */
:root[data-theme="light"] {
    --bg-primary: #f7f7f8;
    --bg-secondary: #ffffff;
    --bg-tertiary: #fbfbfc;
    --bg-hover: #f0f0f3;
    --bg-active: #e8e8ee;

    --text-primary: #111827;
    --text-secondary: #4b5563;
    --text-tertiary: #9ca3af;
    --text-inverse: #ffffff;

    --border-primary: #e5e7eb;
    --border-secondary: #eef2f7;
    --border-hover: #d1d5db;
    --border-focus: #7c3aed;

    --shadow-xs: 0 1px 2px 0 rgba(17, 24, 39, 0.06);
    --shadow-sm: 0 1px 3px 0 rgba(17, 24, 39, 0.08), 0 1px 2px 0 rgba(17, 24, 39, 0.06);
    --shadow-md: 0 6px 14px -6px rgba(17, 24, 39, 0.14);
    --shadow-lg: 0 14px 30px -14px rgba(17, 24, 39, 0.18);
    --shadow-xl: 0 22px 50px -22px rgba(17, 24, 39, 0.20);
    --shadow-2xl: 0 26px 70px -28px rgba(17, 24, 39, 0.22);
    --shadow-glow: 0 0 18px rgba(124, 58, 237, 0.18);
}

/* ============================================
   2. GLOBAL RESETS & BASE STYLES
   ============================================ */

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

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

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    font-weight: var(--font-normal);
    line-height: var(--leading-normal);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

/* ============================================
   3. LAYOUT STRUCTURE
   ============================================ */

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

/* Sidebar */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-primary);
    display: flex;
    flex-direction: column;
    z-index: var(--z-fixed);
    overflow-y: auto;
}

.sidebar-header {
    padding: var(--space-6);
    border-bottom: 1px solid var(--border-primary);
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.sidebar-logo {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: var(--font-bold);
    color: white;
    flex-shrink: 0;
}

.sidebar-brand {
    display: flex;
    flex-direction: column;
}

.sidebar-brand-title {
    font-size: var(--text-lg);
    font-weight: var(--font-bold);
    color: var(--text-primary);
    line-height: 1.2;
}

.sidebar-brand-subtitle {
    font-size: var(--text-xs);
    color: var(--text-secondary);
    letter-spacing: 0.025em;
}

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

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

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

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9375rem; /* 15px */
    font-weight: var(--font-medium);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

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

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

.nav-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 20px;
    background: var(--accent-primary);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.nav-item-icon {
    width: 20px;
    font-size: 1.125rem;
    text-align: center;
}

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

.sidebar-footer {
    padding: var(--space-4);
    border-top: 1px solid var(--border-primary);
}

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

.sidebar-user:hover {
    background: var(--bg-hover);
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-bold);
    color: white;
    flex-shrink: 0;
}

.user-info {
    flex: 1;
    overflow: hidden;
}

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

.user-email {
    font-size: var(--text-xs);
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

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

.topbar {
    height: var(--topbar-height);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-primary);
    padding: 0 var(--space-8);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: var(--space-6);
}

.page-title {
    font-size: var(--text-2xl);
    font-weight: var(--font-bold);
    color: var(--text-primary);
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
}

.breadcrumb-item {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.breadcrumb-item:hover {
    color: var(--text-primary);
}

.breadcrumb-separator {
    color: var(--text-tertiary);
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.search-bar {
    position: relative;
    width: 400px;
}

.search-input {
    width: 100%;
    padding: var(--space-3) var(--space-4) var(--space-3) var(--space-10);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-size: var(--text-sm);
    transition: all var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--border-focus);
    background: var(--bg-primary);
}

.search-icon {
    position: absolute;
    left: var(--space-4);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-tertiary);
    pointer-events: none;
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.icon-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

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

.icon-btn.has-badge::after {
    content: '';
    position: absolute;
    top: 10px;
    right: 10px;
    width: 8px;
    height: 8px;
    background: var(--accent-danger);
    border: 2px solid var(--bg-secondary);
    border-radius: var(--radius-full);
}

/* Content Area */
.content-area {
    flex: 1;
    padding: var(--space-8);
    max-width: var(--content-max-width);
    margin: 0 auto;
    width: 100%;
}

/* ============================================
   4. COMPONENTS - Buttons
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    font-size: 0.9375rem; /* 15px for readability */
    font-weight: var(--font-semibold);
    font-family: var(--font-sans);
    line-height: 1;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    box-shadow: var(--shadow-md), var(--shadow-glow);
    transform: translateY(-1px);
}

.btn-primary:active {
    transform: translateY(0);
}

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

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

.btn-danger {
    background: var(--accent-danger);
    color: white;
}

.btn-danger:hover {
    background: #dc2626;
    box-shadow: var(--shadow-md);
}

.btn-success {
    background: var(--accent-success);
    color: white;
}

.btn-success:hover {
    background: #059669;
    box-shadow: var(--shadow-md);
}

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

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

.btn-sm {
    padding: 0.45rem 0.7rem;
    font-size: 0.8125rem; /* 13px for readability */
}

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

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ============================================
   5. COMPONENTS - Cards
   ============================================ */

.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-fast);
}

.card:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-lg);
}

.card-header {
    padding: var(--space-6);
    border-bottom: 1px solid var(--border-primary);
}

.card-title {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--text-primary);
    margin-bottom: var(--space-1);
}

.card-subtitle {
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.card-body {
    padding: var(--space-6);
}

.card-footer {
    padding: var(--space-6);
    border-top: 1px solid var(--border-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Stat Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-6);
    margin-bottom: var(--space-8);
}

.stat-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    transition: all var(--transition-fast);
}

.stat-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.stat-label {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin-bottom: var(--space-2);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-value {
    font-size: var(--text-4xl);
    font-weight: var(--font-extrabold);
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.stat-value.accent-primary {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-change {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
}

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

.stat-change.negative {
    color: var(--accent-danger);
}

/* ============================================
   6. COMPONENTS - Forms
   ============================================ */

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

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

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

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--border-focus);
    background: var(--bg-secondary);
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1);
}

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

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

.form-error {
    font-size: var(--text-xs);
    color: var(--accent-danger);
    margin-top: var(--space-2);
}

/* ============================================
   7. COMPONENTS - Tables
   ============================================ */

.table-container {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table thead {
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-primary);
}

.table th {
    padding: var(--space-4) var(--space-6);
    text-align: left;
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.table td {
    padding: var(--space-4) var(--space-6);
    font-size: var(--text-sm);
    color: var(--text-primary);
    border-top: 1px solid var(--border-secondary);
}

.table tbody tr {
    transition: background var(--transition-fast);
}

.table tbody tr:hover {
    background: var(--bg-hover);
}

/* ============================================
   8. COMPONENTS - Badges & Status
   ============================================ */

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    border-radius: var(--radius-full);
    line-height: 1;
}

.badge-primary {
    background: rgba(124, 58, 237, 0.15);
    color: #a78bfa;
}

.badge-success {
    background: rgba(16, 185, 129, 0.15);
    color: #34d399;
}

.badge-warning {
    background: rgba(245, 158, 11, 0.15);
    color: #fbbf24;
}

.badge-danger {
    background: rgba(239, 68, 68, 0.15);
    color: #f87171;
}

.badge-info {
    background: rgba(6, 182, 212, 0.15);
    color: #22d3ee;
}

/* ============================================
   9. COMPONENTS - Modals
   ============================================ */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal-backdrop);
    padding: var(--space-4);
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-2xl);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-2xl);
    animation: modalSlideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalSlideUp {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.96);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-header {
    padding: var(--space-6);
    border-bottom: 1px solid var(--border-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--text-primary);
}

.modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.modal-body {
    padding: var(--space-6);
}

.modal-footer {
    padding: var(--space-6);
    border-top: 1px solid var(--border-primary);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--space-3);
}

/* ============================================
   10. UTILITY CLASSES
   ============================================ */

.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.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-4 {
    gap: var(--space-4);
}

.mt-4 {
    margin-top: var(--space-4);
}

.mb-4 {
    margin-bottom: var(--space-4);
}

.mb-8 {
    margin-bottom: var(--space-8);
}

/* ============================================
   11. AUTH SCREEN
   ============================================ */

body.auth-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: var(--bg-primary);
}

body.auth-screen .app-container {
    display: none;
}

.auth-container {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-2xl);
    padding: var(--space-10);
    box-shadow: var(--shadow-2xl);
    max-width: 420px;
    width: 90%;
}

.auth-header {
    text-align: center;
    margin-bottom: var(--space-8);
}

.auth-logo {
    width: 64px;
    height: 64px;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
    margin: 0 auto var(--space-4);
}

.auth-title {
    font-size: 1.75rem;
    font-weight: var(--font-extrabold);
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.auth-subtitle {
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.auth-form {
    margin-bottom: var(--space-6);
}

.auth-toggle {
    text-align: center;
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.auth-toggle a {
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: var(--font-semibold);
    transition: color var(--transition-fast);
}

.auth-toggle a:hover {
    color: var(--accent-primary-hover);
}

/* ============================================
   12. RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 1024px) {
    :root {
        --sidebar-width: 240px;
    }
    
    .search-bar {
        width: 300px;
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform var(--transition-base);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .topbar {
        padding: 0 var(--space-4);
    }
    
    .search-bar {
        display: none;
    }
    
    .content-area {
        padding: var(--space-4);
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   13. LOADING & ANIMATIONS
   ============================================ */

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-primary);
    border-top-color: var(--accent-primary);
    border-radius: var(--radius-full);
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.fade-in {
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* ============================================
   14. EXTENDED UTILITY CLASSES
   ============================================ */

/* Additional Text Sizes */
.text-2xl {
    font-size: var(--text-2xl);
    font-weight: var(--font-bold);
    line-height: var(--leading-tight);
}

.text-xl {
    font-size: var(--text-xl);
    font-weight: var(--font-semibold);
}

.text-lg {
    font-size: var(--text-lg);
    font-weight: var(--font-medium);
}

.text-sm {
    font-size: var(--text-sm);
}

.text-xs {
    font-size: var(--text-xs);
}

/* Color Utilities */
.text-primary {
    color: var(--accent-primary);
}

.text-success {
    color: var(--accent-success);
}

.text-warning {
    color: var(--accent-warning);
}

.text-danger {
    color: var(--accent-danger);
}

.text-muted {
    color: var(--text-secondary);
}

/* Font Weights */
.font-bold {
    font-weight: var(--font-bold);
}

.font-semibold {
    font-weight: var(--font-semibold);
}

.font-normal {
    font-weight: var(--font-normal);
}

/* Spacing Utilities */
.items-start {
    align-items: flex-start;
}

.justify-center {
    justify-content: center;
}

.gap-1 { gap: var(--space-1); }
.gap-3 { gap: var(--space-3); }

.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }

.p-3 { padding: var(--space-3); }
.p-4 { padding: var(--space-4); }

/* Grid Utilities */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
}

/* Priority Labels */
.priority-high {
    color: var(--accent-danger);
    font-weight: var(--font-semibold);
}

.priority-medium {
    color: var(--accent-warning);
    font-weight: var(--font-semibold);
}

.priority-low {
    color: var(--text-tertiary);
    font-weight: var(--font-normal);
}

/* Chart Container */
.chart-container {
    position: relative;
    width: 100%;
    padding: var(--space-4);
}

/* Data Table */
.data-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.data-table thead {
    background: var(--bg-secondary);
}

.data-table th {
    padding: var(--space-4) var(--space-6);
    text-align: left;
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 2px solid var(--border-primary);
}

.data-table td {
    padding: var(--space-4) var(--space-6);
    font-size: var(--text-sm);
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-secondary);
}

.data-table tbody tr {
    transition: background var(--transition-fast);
}

.data-table tbody tr:hover {
    background: var(--bg-hover);
}

/* Stat Cards Container */
.stat-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-6);
    margin-bottom: var(--space-6);
}

/* API Status Card (for trends page) */
.api-status-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    transition: all var(--transition-fast);
}

.api-status-card:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-md);
}