/* ============================================
   CRYPTO PORTFOLIO TRACKER - STYLES
   Dark theme with purple/cyan/neon accents
   ============================================ */

:root {
    --primary: #8b5cf6;
    --primary-dark: #7c3aed;
    --secondary: #06b6d4;
    --accent: #ec4899;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --bg: #0a0a0f;
    --bg-card: rgba(15, 23, 42, 0.8);
    --bg-glass: rgba(15, 23, 42, 0.6);
    --text: #f1f5f9;
    --text-muted: #94a3b8;
    --text-glow: rgba(139, 92, 246, 0.5);
    --border: rgba(100, 116, 139, 0.3);
    --border-glow: rgba(139, 92, 246, 0.3);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
    --glow: 0 0 20px rgba(139, 92, 246, 0.3);
    --glow-cyan: 0 0 20px rgba(6, 182, 212, 0.3);
    --glow-pink: 0 0 20px rgba(236, 72, 153, 0.3);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Animated Background */
.animated-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.gradient-overlay {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.15) 0%, transparent 70%);
    animation: rotate 40s linear infinite;
    filter: blur(1px);
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.particles {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(139, 92, 246, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 90% 80%, rgba(6, 182, 212, 0.3) 0%, transparent 50%);
}

/* Header */
header {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 40px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 1.5rem;
    color: white;
    text-decoration: none;
}

.logo-icon {
    width: 40px;
    height: 40px;
}

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

nav ul {
    display: flex;
    list-style: none;
    gap: 32px;
}

nav a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
    position: relative;
}

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

nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transition: width 0.3s;
}

nav a:hover::after {
    width: 100%;
}

.header-actions {
    display: flex;
    gap: 16px;
    align-items: center;
}

/* Buttons */
.btn {
    padding: 12px 28px;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
    border: none;
    cursor: pointer;
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    box-shadow: 0 0 15px rgba(139, 92, 246, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 25px rgba(139, 92, 246, 0.6);
}

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

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

.glowing-btn {
    position: relative;
    overflow: hidden;
}

.glowing-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.glowing-btn:hover::before {
    left: 100%;
}

/* Hero Section */
.hero {
    padding: 140px 0 100px;
    text-align: center;
    position: relative;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(139, 92, 246, 0.2);
    padding: 10px 20px;
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--primary);
    margin-bottom: 32px;
    border: 1px solid rgba(139, 92, 246, 0.3);
    backdrop-filter: blur(10px);
}

.badge-icon {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero h1 {
    font-size: 4rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -2px;
}

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

.hero p {
    font-size: 1.3rem;
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto 48px;
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Section Styles */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
}

.section-title {
    text-align: center;
    margin-bottom: 80px;
}

.section-title .subtitle {
    color: var(--primary);
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 12px;
}

.section-title h2 {
    font-size: 2.8rem;
    font-weight: 800;
    line-height: 1.2;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Features Grid */
.features {
    padding: 100px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 32px;
}

.feature-card {
    background: var(--bg-card);
    padding: 40px;
    border-radius: 16px;
    border: 1px solid var(--border);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transform: scaleX(0);
    transition: transform 0.4s;
}

.feature-card:hover {
    transform: translateY(-12px);
    border-color: rgba(139, 92, 246, 0.5);
    box-shadow: var(--glow);
}

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

.feature-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(6, 182, 212, 0.2));
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    margin-bottom: 24px;
    color: var(--primary);
}

.feature-icon svg {
    width: 28px;
    height: 28px;
}

.feature-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: white;
}

.feature-card p {
    color: var(--text-muted);
    line-height: 1.7;
}

/* Crypto Ticker */
.crypto-ticker {
    padding: 60px 0;
    background: rgba(139, 92, 246, 0.05);
    border-bottom: 1px solid var(--border);
}

.crypto-ticker h2 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 40px;
}

.ticker-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.ticker-card {
    background: var(--bg-card);
    padding: 24px;
    border-radius: 12px;
    border: 1px solid var(--border);
    transition: all 0.3s;
    backdrop-filter: blur(10px);
}

.ticker-card:hover {
    transform: translateY(-6px);
    border-color: var(--primary);
    box-shadow: var(--glow);
}

.ticker-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.ticker-symbol {
    font-weight: 700;
    font-size: 1.3rem;
    color: white;
}

.ticker-status {
    font-weight: 600;
    font-size: 0.85rem;
    padding: 6px 12px;
    border-radius: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.ticker-status.bullish {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success);
}

.ticker-status.bearish {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger);
}

.ticker-price {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: white;
}

.ticker-change {
    font-size: 0.95rem;
    font-weight: 500;
}

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

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

/* Portfolio Preview */
.portfolio-preview {
    padding: 100px 0;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.1), rgba(6, 182, 212, 0.1));
}

.preview-container {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

.preview-frame {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 20px;
    border: 1px solid var(--border);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(10px);
}

.preview-content {
    text-align: center;
    padding: 60px 20px;
}

.preview-icon {
    font-size: 4rem;
    margin-bottom: 20px;
}

.preview-content h3 {
    font-size: 1.8rem;
    margin-bottom: 12px;
    color: white;
}

.preview-content > p {
    color: var(--text-muted);
    margin-bottom: 30px;
}

.preview-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* CTA */
.cta {
    padding: 120px 0;
    text-align: center;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.1), rgba(6, 182, 212, 0.05));
}

.cta h2 {
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: 24px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cta p {
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 48px;
    font-size: 1.15rem;
    line-height: 1.8;
}

/* Footer */
footer {
    background: rgba(15, 23, 42, 0.9);
    border-top: 1px solid var(--border);
    padding: 80px 0 40px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 48px;
    margin-bottom: 56px;
}

.footer-brand .logo {
    font-size: 1.4rem;
    margin-bottom: 20px;
}

.footer-description {
    color: var(--text-muted);
    line-height: 1.7;
    max-width: 300px;
}

.footer-links h4 {
    font-weight: 700;
    margin-bottom: 24px;
    color: white;
    font-size: 1rem;
}

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

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s;
    display: block;
    padding: 8px 0;
    font-size: 0.95rem;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 32px;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Scroll Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* AOS-like animations */
[data-aos] {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

[data-aos].aos-animate {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 24px;
        padding: 0 20px;
    }

    nav ul {
        gap: 16px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero {
        padding: 100px 0 60px;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero p {
        font-size: 1.1rem;
    }

    .hero-actions {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 320px;
    }

    .section-title h2 {
        font-size: 2rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--primary), var(--secondary));
    border-radius: 4px;
}

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

/* Selection */
::selection {
    background: var(--primary);
    color: white;
}