/**
 * SwappShack Main Stylesheet
 * Modern Light Silver Design with Glassmorphism
 * Built by Claude (Anthropic)
 */

/* ============================================================================
   CSS VARIABLES - LIGHT SILVER THEME
   ============================================================================ */
:root {
    /* Primary Colors */
    --primary: #7c3aed;
    --primary-dark: #5b21b6;
    --primary-light: #8b5cf6;
    --primary-glow: rgba(124, 58, 237, 0.3);
    
    /* Accent Colors */
    --accent: #f43f5e;
    --accent-light: #fb7185;
    --accent-dark: #be123c;
    
    /* Status Colors */
    --success: #059669;
    --success-light: #10b981;
    --warning: #d97706;
    --warning-light: #f59e0b;
    --error: #dc2626;
    --error-light: #ef4444;
    --info: #2563eb;
    
    /* Light Theme Colors */
    --dark: #e2e8f0;
    --dark-light: #f1f5f9;
    --dark-lighter: #f8fafc;
    --gray: #64748b;
    --gray-light: #475569;
    --gray-lighter: #334155;
    --light: #1e293b;
    --white: #0f172a;
    
    /* Background */
    --bg-primary: #e2e8f0;
    --bg-secondary: #cbd5e1;
    --bg-card: #f1f5f9;
    
    /* Text Colors */
    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-muted: #64748b;
    
    /* Glass Effect - Light Theme */
    --glass: rgba(255, 255, 255, 0.7);
    --glass-light: rgba(255, 255, 255, 0.85);
    --glass-border: rgba(0, 0, 0, 0.1);
    --glass-border-light: rgba(0, 0, 0, 0.08);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.15);
    --shadow-glow: 0 0 40px var(--primary-glow);
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius: 12px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-display: 'Space Grotesk', var(--font-sans);
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* Layout */
    --container-width: 1400px;
    --nav-height: 70px;
}

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

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

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(135deg, #e2e8f0 0%, #cbd5e1 50%, #e2e8f0 100%);
    background-attachment: fixed;
    min-height: 100vh;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

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

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

/* ============================================================================
   UTILITY CLASSES
   ============================================================================ */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

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

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

.font-display { font-family: var(--font-display); }
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }

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

/* ============================================================================
   ANIMATED BACKGROUND
   ============================================================================ */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.bg-animation::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: 
        radial-gradient(circle at 20% 80%, rgba(124, 58, 237, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(244, 63, 94, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(16, 185, 129, 0.03) 0%, transparent 50%);
    animation: bgPulse 25s ease-in-out infinite;
}

@keyframes bgPulse {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(-3%, 3%) scale(1.03); }
    50% { transform: translate(3%, -3%) scale(1); }
    75% { transform: translate(-2%, -2%) scale(1.02); }
}

/* ============================================================================
   NAVIGATION
   ============================================================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    height: var(--nav-height);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo-icon {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.logo-text span {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.nav-link {
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

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

.nav-cta {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #ffffff !important;
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius);
    font-weight: 600;
    transition: var(--transition);
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-primary);
}

/* ============================================================================
   BUTTONS
   ============================================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #ffffff;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

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

.btn-secondary:hover {
    background: var(--glass-light);
    border-color: var(--primary);
}

.btn-sm {
    padding: var(--space-xs) var(--space-md);
    font-size: 0.875rem;
}

.btn-lg {
    padding: var(--space-md) var(--space-xl);
    font-size: 1.1rem;
}

/* ============================================================================
   BADGES
   ============================================================================ */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    background: var(--accent);
    color: #ffffff;
}

.badge-success {
    background: rgba(5, 150, 105, 0.15);
    color: var(--success);
    border: 1px solid rgba(5, 150, 105, 0.3);
}

.badge-accent {
    background: rgba(244, 63, 94, 0.15);
    color: var(--accent);
    border: 1px solid rgba(244, 63, 94, 0.3);
}

/* ============================================================================
   ALERTS
   ============================================================================ */
.alert {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius);
    margin-bottom: var(--space-lg);
}

.alert-success {
    background: rgba(5, 150, 105, 0.1);
    border: 1px solid rgba(5, 150, 105, 0.3);
    color: var(--success);
}

.alert-error {
    background: rgba(220, 38, 38, 0.1);
    border: 1px solid rgba(220, 38, 38, 0.3);
    color: var(--error);
}

.alert-warning {
    background: rgba(217, 119, 6, 0.1);
    border: 1px solid rgba(217, 119, 6, 0.3);
    color: var(--warning);
}

.alert-info {
    background: rgba(37, 99, 235, 0.1);
    border: 1px solid rgba(37, 99, 235, 0.3);
    color: var(--info);
}

/* ============================================================================
   CARDS
   ============================================================================ */
.card {
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
}

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

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

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

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    background: #ffffff;
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: var(--space-md);
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition);
}

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

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

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

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

/* ============================================================================
   GRID LAYOUTS
   ============================================================================ */
.grid {
    display: grid;
    gap: var(--space-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.grid-auto {
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}

.grid-auto-sm {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
}

/* ============================================================================
   PAGINATION
   ============================================================================ */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-sm);
    margin-top: var(--space-xl);
    padding: var(--space-lg) 0;
}

.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 var(--space-md);
    border-radius: var(--radius);
    font-weight: 500;
    transition: var(--transition);
    color: var(--text-primary);
}

.pagination a {
    background: var(--glass);
    border: 1px solid var(--glass-border);
}

.pagination a:hover {
    background: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
}

.pagination .current {
    background: var(--primary);
    color: #ffffff;
}

/* ============================================================================
   FOOTER
   ============================================================================ */
.footer {
    background: var(--glass);
    border-top: 1px solid var(--glass-border);
    padding: var(--space-3xl) 0 var(--space-xl);
    margin-top: var(--space-3xl);
}

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

.footer-brand p {
    color: var(--text-muted);
    margin-top: var(--space-md);
    line-height: 1.7;
}

.footer-title {
    font-weight: 700;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--space-sm);
}

.footer-links a {
    color: var(--text-muted);
    transition: var(--transition);
}

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

.footer-bottom {
    border-top: 1px solid var(--glass-border);
    padding-top: var(--space-xl);
    text-align: center;
    color: var(--text-muted);
}

/* ============================================================================
   RESPONSIVE
   ============================================================================ */
@media (max-width: 1024px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: var(--space-md);
        border-bottom: 1px solid var(--glass-border);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .mobile-toggle {
        display: block;
    }
    
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    :root {
        --nav-height: 60px;
    }
    
    .container {
        padding: 0 var(--space-md);
    }
    
    .grid-2,
    .grid-3,
    .grid-4 { 
        grid-template-columns: 1fr; 
    }
    
    .grid-auto {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .nav {
        padding: var(--space-sm) var(--space-md);
    }
    
    .logo {
        font-size: 1.25rem;
    }
    
    .logo-icon {
        width: 36px;
        height: 36px;
        font-size: 1.25rem;
    }
}

/* ============================================================================
   SCROLLBAR
   ============================================================================ */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--gray);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}