/* ============================================
   CSS Variables - Dark Finance-Grade Theme
   Palette inspired by professional terminals
   ============================================ */
:root {
    /* Color Palette */
    --background: #0a0e14;
    --surface: #141922;
    --surface-elevated: #1c2230;
    --text: #e6edf3;
    --text-muted: #8b949e;
    --accent: #7c8aff;  /* Palette-inspired accent */
    --accent-glow: rgba(124, 138, 255, 0.3);
    --border: #30363d;
    --positive: #3fb950;
    --neutral: #8b949e;
    
    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', monospace;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Layout */
    --max-width: 1200px;
    --nav-height: 70px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

/* ============================================
   Reset & Base Styles
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--background);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   Navigation
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(10, 14, 20, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    transition: background var(--transition-normal);
}

.nav.scrolled {
    background: rgba(10, 14, 20, 0.95);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    text-decoration: none;
    color: var(--text);
    font-weight: 600;
    font-size: 1.25rem;
    transition: opacity var(--transition-fast);
}

.logo:hover {
    opacity: 0.8;
}

.logo-text {
    font-family: var(--font-mono);
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width var(--transition-fast);
}

.nav-links a:hover::after {
    width: 100%;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--nav-height);
    position: relative;
    overflow: hidden;
}

/* Subtle background gradient */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    opacity: 0.15;
    pointer-events: none;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    width: 100%;
}

.hero-content {
    position: relative;
    z-index: 1;
    /* Animation applied via JS */
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.35rem);
    color: var(--text-muted);
    max-width: 600px;
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    transition: all var(--transition-fast);
    font-family: var(--font-sans);
}

.btn-primary {
    background: var(--accent);
    color: white;
    box-shadow: 0 4px 12px var(--accent-glow);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--accent-glow);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

/* Disabled button state */
.btn-disabled {
    opacity: 0.4;
    cursor: not-allowed !important;
    box-shadow: none !important;
}

.btn-disabled:hover {
    transform: none !important;
}

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

.btn-secondary:hover {
    border-color: var(--accent);
    background: rgba(124, 138, 255, 0.1);
}

/* ============================================
   Stats Panel
   ============================================ */
.stats-panel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.stat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: var(--spacing-md);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

/* Hover effect with subtle glow */
.stat-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3), 0 0 0 1px var(--accent-glow);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), transparent);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.stat-card:hover::before {
    opacity: 1;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-xs);
    font-family: var(--font-mono);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: var(--spacing-xs);
    font-family: var(--font-mono);
}

.stat-change {
    font-size: 0.9rem;
    font-weight: 600;
    font-family: var(--font-mono);
}

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

.stat-change.neutral {
    color: var(--neutral);
}

/* ============================================
   About Section
   ============================================ */
.about {
    padding: var(--spacing-xl) 0;
    background: var(--surface);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    text-align: center;
    letter-spacing: -0.02em;
}

.about-text {
    max-width: 800px;
    margin: 0 auto var(--spacing-lg);
    color: var(--text-muted);
    font-size: 1.1rem;
    text-align: center;
    line-height: 1.8;
}

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

.feature-card {
    background: var(--surface-elevated);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: var(--spacing-md);
    transition: all var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.feature-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(124, 138, 255, 0.1);
    border-radius: 10px;
    color: var(--accent);
    margin-bottom: var(--spacing-sm);
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text);
}

.feature-desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ============================================
   Contact Section
   ============================================ */
.contact {
    padding: var(--spacing-xl) 0;
}

.contact-text {
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
    color: var(--text-muted);
    font-size: 1.1rem;
    text-align: center;
    line-height: 1.8;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: var(--spacing-md);
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.875rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 1rem;
    font-family: var(--font-sans);
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

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

.form-message {
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm);
    background: rgba(124, 138, 255, 0.1);
    border: 1px solid var(--accent);
    border-radius: 8px;
    color: var(--accent);
    text-align: center;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    padding: var(--spacing-lg) 0;
    background: var(--surface);
    border-top: 1px solid var(--border);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ============================================
   Scroll Reveal Animation
   ============================================ */
.section-reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.section-reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   Responsive Design - Mobile First
   ============================================ */
@media (max-width: 768px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }
    
    .nav-container {
        padding: 0 var(--spacing-sm);
    }
    
    .nav-links {
        gap: var(--spacing-sm);
    }
    
    .nav-links a {
        font-size: 0.9rem;
    }
    
    .hero {
        min-height: auto;
        padding: calc(var(--nav-height) + var(--spacing-lg)) 0 var(--spacing-lg);
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        text-align: center;
    }
    
    .stats-panel {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }
    
    .features {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .stats-panel {
        grid-template-columns: 1fr;
    }
    
    .stat-value {
        font-size: 1.75rem;
    }
}

/* ============================================
   Accessibility - Reduced Motion
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
    
    .section-reveal {
        opacity: 1;
        transform: none;
    }
    
    .hero-content {
        opacity: 1;
        transform: none;
        animation: none;
    }
}

/* ============================================
   Focus Styles for Accessibility
   ============================================ */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}