/* 
 * Premium Crypto Landing Page Styles
 * Theme: High-contrast Dark Mode with Cyber Yellow Accents
 */

/* ===========================
   CSS VARIABLES
   =========================== */
:root {
    --color-bg-primary: #0a0a0a;
    --color-bg-secondary: #1a1a1a;
    --color-accent: #FFD700;
    --color-accent-hover: #F4B400;
    --color-text-primary: #ffffff;
    --color-text-secondary: #e0e0e0;
    --color-border: #333333;
    
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 48px;
    --spacing-xl: 64px;
    
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg-primary);
    color: var(--color-text-secondary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ===========================
   CONTAINER
   =========================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===========================
   HEADER
   =========================== */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-sm) 0;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 50px;
    width: auto;
    transition: var(--transition);
}

.logo-img:hover {
    transform: scale(1.05);
}

/* ===========================
   BUTTONS
   =========================== */
.btn {
    display: inline-block;
    padding: 12px 28px;
    background-color: var(--color-accent);
    color: var(--color-bg-primary);
    font-weight: 700;
    font-size: 14px;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: var(--border-radius);
    border: 2px solid var(--color-accent);
    transition: var(--transition);
    cursor: pointer;
}

.btn:hover {
    background-color: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(255, 215, 0, 0.3);
}

.btn-header {
    padding: 10px 24px;
    font-size: 13px;
}

.btn-primary {
    font-size: 16px;
}

.btn-large {
    padding: 18px 48px;
    font-size: 18px;
    display: inline-flex;
    align-items: center;
    gap: 12px;
}

.btn-icon {
    font-size: 24px;
}

/* ===========================
   HERO SECTION
   =========================== */
.hero {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255, 215, 0, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.hero-title {
    font-size: 56px;
    font-weight: 900;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
    text-shadow: 0 0 30px rgba(255, 215, 0, 0.2);
}

.hero-subtitle {
    font-size: 24px;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.extra-message {
    background-color: rgba(255, 215, 0, 0.1);
    border: 1px solid var(--color-accent);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    margin: var(--spacing-md) auto var(--spacing-lg);
    max-width: 700px;
}

.extra-message p {
    color: var(--color-text-primary);
    font-size: 18px;
    line-height: 1.6;
    margin: 0;
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.feature-card {
    background-color: var(--color-bg-primary);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
    transform: scaleX(0);
    transition: var(--transition);
}

.feature-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-8px);
    box-shadow: 0 12px 30px rgba(255, 215, 0, 0.2);
}

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

.feature-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-sm);
    filter: grayscale(100%) brightness(1.2);
}

.feature-card:hover .feature-icon {
    filter: grayscale(0%) brightness(1.5);
}

.feature-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

.feature-desc {
    font-size: 16px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ===========================
   PERFORMANCE SECTION
   =========================== */
.performance {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-bg-primary);
}

.performance-title {
    font-size: 42px;
    font-weight: 800;
    color: var(--color-text-primary);
    text-align: center;
    margin-bottom: var(--spacing-sm);
    text-shadow: 0 0 20px rgba(255, 215, 0, 0.2);
}

.performance-subtitle {
    font-size: 18px;
    color: var(--color-text-secondary);
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.performance-info {
    background-color: rgba(255, 215, 0, 0.05);
    border: 1px solid rgba(255, 215, 0, 0.2);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    max-width: 900px;
    margin: 0 auto var(--spacing-lg);
    backdrop-filter: blur(10px);
}

.performance-info-text {
    color: var(--color-text-secondary);
    font-size: 15px;
    line-height: 1.7;
    margin-bottom: var(--spacing-sm);
    text-align: left;
}

.performance-info-text:last-of-type {
    margin-bottom: var(--spacing-sm);
}

.performance-info-text strong {
    color: var(--color-accent);
    font-weight: 600;
}

.performance-info-note {
    color: var(--color-text-primary);
    font-size: 14px;
    font-style: italic;
    margin-bottom: 0;
    padding: var(--spacing-sm);
    background-color: rgba(255, 215, 0, 0.08);
    border-radius: 4px;
    border-left: 3px solid var(--color-accent);
}

.chart-container {
    background-color: var(--color-bg-secondary);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    max-width: 1000px;
    margin: 0 auto;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.chart-container canvas {
    max-width: 100%;
    height: auto;
}

/* ===========================
   FOOTER
   =========================== */
.footer {
    background-color: var(--color-bg-primary);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-lg) 0;
    text-align: center;
}

.footer-copyright {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.footer-disclaimer {
    font-size: 12px;
    color: #888888;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

.footer-disclaimer strong {
    color: var(--color-accent);
}

/* ===========================
   RESPONSIVE DESIGN
   =========================== */

/* Tablet */
@media (max-width: 768px) {
    .hero-title {
        font-size: 40px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .extra-message {
        padding: var(--spacing-sm);
        margin: var(--spacing-sm) auto var(--spacing-md);
    }
    
    .extra-message p {
        font-size: 16px;
    }
    
    .btn-large {
        padding: 16px 36px;
        font-size: 16px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .feature-card {
        padding: var(--spacing-md);
    }
    
    .performance-title {
        font-size: 32px;
    }
    
    .performance-subtitle {
        font-size: 16px;
    }
    
    .performance-info {
        padding: var(--spacing-sm);
    }
    
    .performance-info-text {
        font-size: 14px;
    }
    
    .performance-info-note {
        font-size: 13px;
    }
    
    .chart-container {
        padding: var(--spacing-md);
    }
}

/* Mobile */
@media (max-width: 480px) {
    .header-content {
        flex-wrap: wrap;
        gap: var(--spacing-sm);
    }
    
    .logo-img {
        height: 40px;
    }
    
    .btn-header {
        padding: 8px 20px;
        font-size: 12px;
    }
    
    .hero {
        min-height: 70vh;
        padding: var(--spacing-lg) 0;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 16px;
        margin-bottom: var(--spacing-md);
    }
    
    .extra-message {
        padding: var(--spacing-sm);
        margin: var(--spacing-sm) auto;
    }
    
    .extra-message p {
        font-size: 14px;
    }
    
    .btn-large {
        padding: 14px 28px;
        font-size: 14px;
    }
    
    .btn-icon {
        font-size: 20px;
    }
    
    .feature-icon {
        font-size: 36px;
    }
    
    .feature-title {
        font-size: 20px;
    }
    
    .feature-desc {
        font-size: 14px;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .performance-title {
        font-size: 28px;
    }
    
    .performance-subtitle {
        font-size: 14px;
    }
    
    .performance-info {
        padding: var(--spacing-sm);
    }
    
    .performance-info-text {
        font-size: 13px;
    }
    
    .performance-info-note {
        font-size: 12px;
        padding: 8px;
    }
    
    .chart-container {
        padding: var(--spacing-sm);
    }
}

/* Extra Small Mobile */
@media (max-width: 320px) {
    .hero-title {
        font-size: 28px;
    }
    
    .hero-subtitle {
        font-size: 14px;
    }
}