/**
 * 6Keywords - Shared Styles
 * Common styles used across all pages
 */

/* ============================================
   CSS Variables (Design Tokens)
   ============================================ */
:root {
    --color-primary: #3b82f6;
    --color-primary-dark: #2563eb;
    --color-brand-red: #d32f2f;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    --color-purple: #8b5cf6;

    --color-gray-50: #f8fafc;
    --color-gray-100: #f1f5f9;
    --color-gray-200: #e2e8f0;
    --color-gray-300: #cbd5e1;
    --color-gray-400: #94a3b8;
    --color-gray-500: #64748b;
    --color-gray-600: #475569;
    --color-gray-700: #334155;
    --color-gray-800: #1e293b;
    --color-gray-900: #0f172a;

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Plus Jakarta Sans', var(--font-sans);
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --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);

    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
}

/* ============================================
   Base Styles
   ============================================ */
* {
    box-sizing: border-box;
}

body {
    background: var(--color-gray-50);
    min-height: 100vh;
    font-family: var(--font-sans);
    color: var(--color-gray-800);
    margin: 0;
    padding: 0;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--color-gray-900);
    margin: 0;
}

/* ============================================
   Header / Navigation Styles
   ============================================ */
.site-header {
    background: white;
    border-bottom: 1px solid var(--color-gray-200);
    position: sticky;
    top: 0;
    z-index: 50;
}

.site-header-inner {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

/* Logo Section */
.site-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

.site-logo-badge {
    background: var(--color-primary);
    color: white;
    font-weight: 700;
    border-radius: 4px;
    padding: 4px 8px;
    font-size: 1.125rem;
    line-height: 1;
}

.site-logo-text {
    color: var(--color-gray-900);
    font-weight: 600;
    font-size: 1.5rem;
    letter-spacing: -0.025em;
}

/* Navigation Divider */
.nav-divider {
    height: 40px;
    width: 1px;
    background: var(--color-gray-200);
    margin: 0 32px;
}

/* Main Navigation */
.main-nav {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-weight: 500;
    color: var(--color-gray-600);
    font-size: 1.0625rem;
    text-decoration: none;
    transition: color 0.2s ease;
    padding: 8px 0;
    position: relative;
}

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

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--color-primary);
}

/* User Section */
.user-section {
    display: flex;
    align-items: center;
    gap: 16px;
}

.user-icon-btn {
    background: none;
    border: none;
    color: var(--color-gray-500);
    cursor: pointer;
    padding: 8px;
    font-size: 1.5rem;
    transition: color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.user-icon-btn:hover {
    color: var(--color-gray-800);
}

.logout-btn {
    border: 1px solid var(--color-gray-300);
    background: white;
    padding: 8px 20px;
    border-radius: var(--radius-md);
    font-weight: 600;
    color: var(--color-gray-700);
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.875rem;
}

.logout-btn:hover {
    background: var(--color-gray-50);
    border-color: var(--color-gray-400);
}

/* ============================================
   Card Styles
   ============================================ */
.pro-card {
    background: white;
    border: 1px solid var(--color-gray-200);
    box-shadow: var(--shadow-sm);
    transition: all 0.2s ease;
    border-radius: var(--radius-xl);
}

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

.pro-card-static {
    background: white;
    border: 1px solid var(--color-gray-200);
    box-shadow: var(--shadow-sm);
    border-radius: var(--radius-xl);
}

/* ============================================
   Button Styles
   ============================================ */
.pro-button {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    font-weight: 600;
    transition: all 0.2s ease;
    box-shadow: var(--shadow-sm);
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.pro-button:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.pro-button-secondary {
    background: white;
    color: var(--color-gray-600);
    border: 1px solid var(--color-gray-200);
    font-weight: 600;
    transition: all 0.2s ease;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.pro-button-secondary:hover {
    background: var(--color-gray-50);
    border-color: var(--color-gray-300);
}

/* ============================================
   Badge Styles
   ============================================ */
.badge {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.badge-success {
    background: #dcfce7;
    color: #166534;
}

.badge-warning {
    background: #fef3c7;
    color: #92400e;
}

.badge-info {
    background: #dbeafe;
    color: #1e40af;
}

.badge-danger {
    background: #fee2e2;
    color: #991b1b;
}

.badge-purple {
    background: #f3e8ff;
    color: #6b21a8;
}

/* ============================================
   Form Styles
   ============================================ */
.pro-input {
    background: white;
    border: 1px solid var(--color-gray-200);
    color: var(--color-gray-800);
    transition: all 0.2s ease;
    border-radius: var(--radius-md);
}

.pro-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.pro-select {
    background: white;
    border: 1px solid var(--color-gray-200);
    color: var(--color-gray-800);
    transition: all 0.2s ease;
    border-radius: var(--radius-md);
}

.pro-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* ============================================
   Gradient Backgrounds
   ============================================ */
.stat-gradient-blue {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
}

.stat-gradient-green {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.stat-gradient-purple {
    background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
}

.stat-gradient-amber {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.stat-gradient-red {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
}

.stat-gradient-cyan {
    background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
}

/* ============================================
   Utility Classes
   ============================================ */
.gradient-text {
    background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Custom scrollbar */
.custom-scrollbar::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.custom-scrollbar::-webkit-scrollbar-track {
    background: var(--color-gray-100);
    border-radius: 4px;
}

.custom-scrollbar::-webkit-scrollbar-thumb {
    background: var(--color-gray-300);
    border-radius: 4px;
}

.custom-scrollbar::-webkit-scrollbar-thumb:hover {
    background: var(--color-gray-400);
}

/* Loading skeleton */
.skeleton {
    background: linear-gradient(90deg, #f1f5f9 25%, #e2e8f0 50%, #f1f5f9 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-md);
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Animations */
@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.animate-spin {
    animation: spin 1s linear infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.animate-pulse {
    animation: pulse 2s ease-in-out infinite;
}

/* ============================================
   Responsive / Mobile
   ============================================ */
@media (max-width: 1024px) {
    .nav-divider {
        margin: 0 16px;
    }

    .main-nav {
        gap: 20px;
    }

    .nav-link {
        font-size: 0.875rem;
    }
}

@media (max-width: 768px) {
    .site-header-inner {
        padding: 0 16px;
    }

    .nav-divider {
        display: none;
    }

    .main-nav {
        display: none; /* TODO: Add mobile menu */
    }

    .site-logo-text {
        font-size: 1.25rem;
    }
}