/**
 * LinkHub Stylesheet
 * Modern, responsive design with CSS custom properties
 */

/* ============================================
   CSS CUSTOM PROPERTIES (Variables)
   ============================================ */
:root {
    /* Colors */
    --color-primary: #6366f1;
    --color-primary-dark: #4f46e5;
    --color-primary-light: #818cf8;
    --color-secondary: #8b5cf6;
    --color-success: #22c55e;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    --color-info: #0ea5e9;
    
    /* Neutrals */
    --color-white: #ffffff;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    
    /* Semantic */
    --color-bg: var(--color-white);
    --color-bg-secondary: var(--color-gray-50);
    --color-text: var(--color-gray-900);
    --color-text-secondary: var(--color-gray-600);
    --color-text-muted: var(--color-gray-400);
    --color-border: var(--color-gray-200);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-family-mono: 'SF Mono', 'Consolas', monospace;
    
    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    
    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition: 200ms ease;
    --transition-slow: 300ms ease;
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    --z-toast: 1080;
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

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

img, svg {
    display: block;
    max-width: 100%;
    height: auto;
}

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

a:hover {
    color: var(--color-primary-dark);
}

button, input, select, textarea {
    font-family: inherit;
    font-size: inherit;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

.container-sm {
    max-width: 640px;
}

.container-md {
    max-width: 768px;
}

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

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

.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-medium { font-weight: 500; }

.hidden { display: none !important; }
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--text-sm);
    font-weight: 600;
    line-height: 1.5;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: var(--color-white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--color-gray-100);
    color: var(--color-text);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--color-gray-200);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
}

.btn-outline:hover:not(:disabled) {
    background: var(--color-primary);
    color: var(--color-white);
}

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

.btn-danger:hover:not(:disabled) {
    background: #dc2626;
}

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

.btn-ghost:hover:not(:disabled) {
    background: var(--color-gray-100);
    color: var(--color-text);
}

.btn-sm {
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--text-xs);
}

.btn-lg {
    padding: var(--spacing-4) var(--spacing-8);
    font-size: var(--text-base);
}

.btn-block {
    width: 100%;
}

/* ============================================
   FORMS
   ============================================ */
.form-group {
    margin-bottom: var(--spacing-4);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-2);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text);
}

.form-input {
    display: block;
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    font-size: var(--text-base);
    line-height: 1.5;
    color: var(--color-text);
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

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

.form-input.error {
    border-color: var(--color-danger);
}

.form-input.error:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-error {
    margin-top: var(--spacing-1);
    font-size: var(--text-sm);
    color: var(--color-danger);
}

.form-hint {
    margin-top: var(--spacing-1);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

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

select.form-input {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--spacing-3) center;
    padding-right: var(--spacing-8);
}

/* Checkbox & Radio */
.form-check {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.form-check-input {
    width: 1.25rem;
    height: 1.25rem;
    cursor: pointer;
    accent-color: var(--color-primary);
}

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

/* ============================================
   NAVBAR
   ============================================ */
.navbar {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
}

.navbar-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--color-text);
    text-decoration: none;
}

.brand-icon {
    font-size: var(--text-2xl);
}

.navbar-nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
}

.navbar-user {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.nav-link {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

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

.navbar-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-2);
    background: none;
    border: none;
    cursor: pointer;
}

.navbar-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: all var(--transition-fast);
}

@media (max-width: 768px) {
    .navbar-nav {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--color-white);
        flex-direction: column;
        padding: var(--spacing-4);
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition);
    }
    
    .navbar-nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .navbar-toggle {
        display: flex;
    }
}

/* ============================================
   MAIN CONTENT
   ============================================ */
.main-content {
    flex: 1;
    padding: var(--spacing-8) 0;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    position: relative;
    padding: var(--spacing-16) 0;
    text-align: center;
    background: linear-gradient(135deg, #1e1b4b 0%, #312e81 50%, #4c1d95 100%);
    color: var(--color-white);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%239C92AC' fill-opacity='0.08'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.hero-content {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-4);
}

.hero-subtitle {
    font-size: var(--text-xl);
    opacity: 0.9;
    margin-bottom: var(--spacing-8);
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-4);
    justify-content: center;
    flex-wrap: wrap;
}

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

.hero .btn-primary:hover {
    background: var(--color-gray-100);
    transform: translateY(-2px);
}

.hero .btn-outline {
    border-color: rgba(255, 255, 255, 0.5);
    color: var(--color-white);
}

.hero .btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--color-white);
}

/* ============================================
   FEATURES SECTION
   ============================================ */
.features {
    padding: var(--spacing-16) 0;
    background: var(--color-bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-8);
}

.feature-card {
    background: var(--color-white);
    padding: var(--spacing-8);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    font-size: var(--text-4xl);
    margin-bottom: var(--spacing-4);
}

.feature-title {
    font-size: var(--text-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-2);
}

.feature-description {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ============================================
   CARDS
   ============================================ */
.card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.card-header {
    padding: var(--spacing-4) var(--spacing-6);
    border-bottom: 1px solid var(--color-border);
}

.card-title {
    font-size: var(--text-lg);
    font-weight: 600;
}

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

.card-footer {
    padding: var(--spacing-4) var(--spacing-6);
    border-top: 1px solid var(--color-border);
    background: var(--color-bg-secondary);
}

/* ============================================
   AUTH PAGES
   ============================================ */
.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-gray-100), var(--color-gray-200));
    padding: var(--spacing-4);
}

.auth-card {
    width: 100%;
    max-width: 420px;
    background: var(--color-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    padding: var(--spacing-8);
}

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

.auth-logo {
    font-size: var(--text-3xl);
    margin-bottom: var(--spacing-4);
}

.auth-title {
    font-size: var(--text-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-2);
}

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

.auth-footer {
    margin-top: var(--spacing-6);
    text-align: center;
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

.auth-footer a {
    font-weight: 500;
}

/* ============================================
   DASHBOARD
   ============================================ */
.dashboard {
    display: grid;
    grid-template-columns: 240px 1fr 320px;
    gap: var(--spacing-6);
    min-height: calc(100vh - 64px);
}

.dashboard-sidebar {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-4);
    box-shadow: var(--shadow);
    height: fit-content;
    position: sticky;
    top: calc(64px + var(--spacing-4));
}

.sidebar-nav {
    list-style: none;
}

.sidebar-item {
    margin-bottom: var(--spacing-1);
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-3) var(--spacing-4);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.sidebar-link:hover {
    background: var(--color-bg-secondary);
    color: var(--color-text);
}

.sidebar-link.active {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: var(--color-white);
}

.sidebar-link svg {
    width: 20px;
    height: 20px;
}

.dashboard-main {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-6);
    box-shadow: var(--shadow);
}

.dashboard-preview {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-4);
    box-shadow: var(--shadow);
    height: fit-content;
    position: sticky;
    top: calc(64px + var(--spacing-4));
}

.preview-header {
    text-align: center;
    margin-bottom: var(--spacing-4);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text-secondary);
}

/* Phone Mockup */
.phone-mockup {
    background: var(--color-gray-900);
    border-radius: 36px;
    padding: 12px;
    margin: 0 auto;
    max-width: 280px;
}

.phone-screen {
    background: var(--color-white);
    border-radius: 24px;
    overflow: hidden;
    min-height: 500px;
}

@media (max-width: 1200px) {
    .dashboard {
        grid-template-columns: 1fr;
    }
    
    .dashboard-sidebar {
        position: static;
    }
    
    .dashboard-preview {
        display: none;
    }
}

@media (max-width: 768px) {
    .dashboard {
        grid-template-columns: 1fr;
    }
    
    .dashboard-sidebar {
        order: -1;
    }
    
    .sidebar-nav {
        display: flex;
        overflow-x: auto;
        gap: var(--spacing-2);
        padding-bottom: var(--spacing-2);
    }
    
    .sidebar-item {
        margin-bottom: 0;
    }
}

/* ============================================
   LINKS LIST
   ============================================ */
.links-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

.link-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    padding: var(--spacing-4);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    transition: all var(--transition-fast);
}

.link-item:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow);
}

.link-item.private {
    background: #fef3c7;
    border-color: #fbbf24;
}

.link-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-white);
    border-radius: var(--radius);
    font-size: var(--text-xl);
    flex-shrink: 0;
}

.link-content {
    flex: 1;
    min-width: 0;
}

.link-title {
    font-weight: 600;
    margin-bottom: var(--spacing-1);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.link-url {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.link-actions {
    display: flex;
    gap: var(--spacing-2);
}

.link-action-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--color-text-secondary);
}

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

.link-action-btn.danger:hover {
    background: var(--color-danger);
    border-color: var(--color-danger);
}

.link-drag-handle {
    cursor: grab;
    color: var(--color-text-muted);
}

.link-drag-handle:active {
    cursor: grabbing;
}

/* ============================================
   PUBLIC PROFILE
   ============================================ */
.profile-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.profile-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-8) var(--spacing-4);
}

.profile-card {
    width: 100%;
    max-width: 480px;
    text-align: center;
}

.profile-image {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto var(--spacing-4);
    border: 4px solid var(--color-white);
    box-shadow: var(--shadow-lg);
    background: var(--color-gray-200);
}

.profile-image-placeholder {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-4);
    color: var(--color-white);
    font-size: var(--text-4xl);
    font-weight: 700;
    box-shadow: var(--shadow-lg);
}

.profile-username {
    font-size: var(--text-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-2);
}

.profile-bio {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-8);
    line-height: 1.6;
}

.profile-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

.profile-link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-3);
    padding: var(--spacing-4) var(--spacing-6);
    background: var(--color-white);
    color: var(--color-text);
    border-radius: var(--radius-lg);
    font-weight: 600;
    text-decoration: none;
    box-shadow: var(--shadow);
    transition: all var(--transition-fast);
    border: 2px solid transparent;
}

.profile-link:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--theme-color, var(--color-primary));
}

.profile-link-icon {
    font-size: var(--text-xl);
}

/* Ad Space */
.ad-space {
    margin-top: var(--spacing-8);
    padding: var(--spacing-4);
    background: var(--color-gray-100);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

/* ============================================
   MODAL
   ============================================ */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: var(--z-modal-backdrop);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
}

.modal-backdrop.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.95);
    background: var(--color-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    z-index: var(--z-modal);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
}

.modal.active {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-4) var(--spacing-6);
    border-bottom: 1px solid var(--color-border);
}

.modal-title {
    font-size: var(--text-lg);
    font-weight: 600;
}

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

.modal-close:hover {
    background: var(--color-gray-100);
    color: var(--color-text);
}

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

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-3);
    padding: var(--spacing-4) var(--spacing-6);
    border-top: 1px solid var(--color-border);
}

/* ============================================
   TOAST NOTIFICATIONS
   ============================================ */
#toast-container {
    position: fixed;
    bottom: var(--spacing-6);
    right: var(--spacing-6);
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-4);
    background: var(--color-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    min-width: 300px;
    max-width: 400px;
    animation: slideIn 0.3s ease;
}

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

.toast.success {
    border-left: 4px solid var(--color-success);
}

.toast.error {
    border-left: 4px solid var(--color-danger);
}

.toast.warning {
    border-left: 4px solid var(--color-warning);
}

.toast.info {
    border-left: 4px solid var(--color-info);
}

.toast-icon {
    font-size: var(--text-xl);
}

.toast-message {
    flex: 1;
    font-size: var(--text-sm);
}

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

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--color-gray-900);
    color: var(--color-white);
    padding: var(--spacing-12) 0 var(--spacing-8);
    margin-top: auto;
}

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

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    font-size: var(--text-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-2);
}

.footer-tagline {
    color: var(--color-gray-400);
    margin-bottom: var(--spacing-6);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-6);
    margin-bottom: var(--spacing-6);
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--color-gray-400);
    font-size: var(--text-sm);
}

.footer-links a:hover {
    color: var(--color-white);
}

.footer-copyright {
    color: var(--color-gray-500);
    font-size: var(--text-sm);
}

/* ============================================
   ANALYTICS
   ============================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-8);
}

.stat-card {
    background: var(--color-bg-secondary);
    padding: var(--spacing-6);
    border-radius: var(--radius-lg);
    text-align: center;
}

.stat-value {
    font-size: var(--text-4xl);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-2);
}

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

/* Chart */
.bar-chart {
    display: flex;
    align-items: flex-end;
    gap: var(--spacing-2);
    height: 200px;
    padding: var(--spacing-4);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
}

.bar {
    flex: 1;
    background: linear-gradient(to top, var(--color-primary), var(--color-primary-light));
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    min-height: 4px;
    position: relative;
    transition: all var(--transition-fast);
}

.bar:hover {
    opacity: 0.8;
}

.bar-label {
    position: absolute;
    bottom: -24px;
    left: 50%;
    transform: translateX(-50%);
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    white-space: nowrap;
}

/* ============================================
   SETTINGS
   ============================================ */
.settings-section {
    margin-bottom: var(--spacing-8);
    padding-bottom: var(--spacing-8);
    border-bottom: 1px solid var(--color-border);
}

.settings-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.settings-title {
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-4);
}

.settings-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-4) 0;
}

.settings-label {
    font-weight: 500;
}

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

/* Toggle Switch */
.toggle {
    position: relative;
    width: 48px;
    height: 28px;
}

.toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background: var(--color-gray-300);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.toggle-slider::before {
    content: '';
    position: absolute;
    height: 22px;
    width: 22px;
    left: 3px;
    bottom: 3px;
    background: var(--color-white);
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.toggle input:checked + .toggle-slider {
    background: var(--color-primary);
}

.toggle input:checked + .toggle-slider::before {
    transform: translateX(20px);
}

/* ============================================
   BADGES
   ============================================ */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-1) var(--spacing-3);
    font-size: var(--text-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-primary {
    background: rgba(99, 102, 241, 0.1);
    color: var(--color-primary);
}

.badge-success {
    background: rgba(34, 197, 94, 0.1);
    color: var(--color-success);
}

.badge-warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--color-warning);
}

.badge-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--color-danger);
}

.badge-premium {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: var(--color-white);
}

/* ============================================
   EMPTY STATE
   ============================================ */
.empty-state {
    text-align: center;
    padding: var(--spacing-12) var(--spacing-4);
}

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

.empty-title {
    font-size: var(--text-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-2);
}

.empty-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-6);
}

/* ============================================
   COLOR PICKER
   ============================================ */
.color-picker {
    display: flex;
    gap: var(--spacing-2);
    flex-wrap: wrap;
}

.color-swatch {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    cursor: pointer;
    border: 3px solid transparent;
    transition: all var(--transition-fast);
}

.color-swatch:hover {
    transform: scale(1.1);
}

.color-swatch.active {
    border-color: var(--color-text);
    box-shadow: 0 0 0 2px var(--color-white), 0 0 0 4px var(--color-text);
}

/* ============================================
   RESPONSIVE ADJUSTMENTS
   ============================================ */
@media (max-width: 640px) {
    .hero {
        padding: var(--spacing-12) 0;
    }
    
    .hero-title {
        font-size: var(--text-3xl);
    }
    
    .hero-subtitle {
        font-size: var(--text-base);
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-buttons .btn {
        width: 100%;
        max-width: 280px;
    }
    
    .auth-card {
        padding: var(--spacing-6);
    }
    
    #toast-container {
        left: var(--spacing-4);
        right: var(--spacing-4);
        bottom: var(--spacing-4);
    }
    
    .toast {
        min-width: auto;
        width: 100%;
    }
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
    .navbar,
    .footer,
    .btn,
    .modal,
    .toast {
        display: none !important;
    }
    
    body {
        background: white;
    }
}