/* CSS Variables */
:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: #1a1a25;
    --bg-card-hover: #22222f;
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-muted: #6b6b7b;
    --accent-primary: #00d4ff;
    --accent-secondary: #0099cc;
    --accent-glow: rgba(0, 212, 255, 0.3);
    --border-color: #2a2a3a;
    --gradient-primary: linear-gradient(135deg, #00d4ff 0%, #0099cc 100%);
    --gradient-bg: linear-gradient(180deg, #0a0a0f 0%, #12121a 100%);
    --shadow-glow: 0 0 40px rgba(0, 212, 255, 0.15);
    --transition: all 0.3s ease;
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.header.scrolled {
    background: rgba(10, 10, 15, 0.95);
    border-bottom-color: var(--border-color);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo-img {
    height: 48px;
    width: auto;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
}

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

.github-link {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--bg-card);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.github-link:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-primary);
}

.github-icon {
    width: 18px;
    height: 18px;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 0 80px;
    background: var(--gradient-bg);
    overflow: hidden;
}

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

.hero-logo {
    width: 180px;
    height: auto;
    margin-bottom: 24px;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.hero-title {
    font-size: clamp(48px, 8vw, 72px);
    font-weight: 700;
    margin-bottom: 16px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(18px, 3vw, 24px);
    color: var(--text-secondary);
    margin-bottom: 24px;
    font-weight: 500;
}

.hero-description {
    font-size: 16px;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.8;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    border-radius: 12px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--bg-primary);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 60px rgba(0, 212, 255, 0.3);
}

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

.btn-secondary:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.hero-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    pointer-events: none;
    opacity: 0.5;
}

/* Sections */
.section {
    padding: 100px 0;
}

.section-title {
    font-size: clamp(32px, 5vw, 42px);
    font-weight: 700;
    text-align: center;
    margin-bottom: 60px;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -16px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

/* About Section */
.about {
    background: var(--bg-secondary);
}

.about-content {
    display: grid;
    gap: 60px;
}

.about-text {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-text p {
    color: var(--text-secondary);
    font-size: 17px;
    margin-bottom: 20px;
    line-height: 1.8;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.feature {
    background: var(--bg-card);
    padding: 32px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: var(--transition);
}

.feature:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.feature-icon {
    font-size: 40px;
    margin-bottom: 16px;
}

.feature h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature p {
    color: var(--text-muted);
    font-size: 14px;
}

/* Projects Section */
.projects {
    background: var(--bg-primary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 24px;
}

.project-card {
    background: var(--bg-card);
    padding: 32px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

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

.project-card.coming-soon {
    opacity: 0.7;
    border-style: dashed;
}

.project-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.project-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
}

.project-description {
    color: var(--text-secondary);
    font-size: 15px;
    margin-bottom: 20px;
    line-height: 1.7;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.tag {
    padding: 6px 12px;
    background: rgba(0, 212, 255, 0.1);
    color: var(--accent-primary);
    font-size: 12px;
    font-weight: 500;
    border-radius: 6px;
}

.project-link {
    display: inline-flex;
    align-items: center;
    color: var(--accent-primary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
}

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

/* Donate Section */
.donate {
    background: var(--bg-secondary);
}

.donate-description {
    text-align: center;
    color: var(--text-secondary);
    font-size: 17px;
    max-width: 700px;
    margin: -20px auto 50px;
    line-height: 1.8;
}

.donate-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 24px;
}

.donate-card {
    background: var(--bg-card);
    padding: 32px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: var(--transition);
}

.donate-card:hover {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
}

.donate-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
    color: var(--accent-primary);
}

.donate-icon.solana {
    color: #9945FF;
}

.donate-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
}

.donate-network {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 20px;
}

.donate-address {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--bg-primary);
    padding: 12px 16px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
}

.donate-address code {
    flex: 1;
    font-family: 'SF Mono', Monaco, 'Courier New', monospace;
    font-size: 12px;
    color: var(--text-secondary);
    word-break: break-all;
    text-align: left;
}

.copy-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    flex-shrink: 0;
}

.copy-btn svg {
    width: 16px;
    height: 16px;
    color: var(--text-secondary);
}

.copy-btn:hover {
    border-color: var(--accent-primary);
}

.copy-btn:hover svg {
    color: var(--accent-primary);
}

.copy-btn.copied {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
}

.copy-btn.copied svg {
    color: var(--bg-primary);
}

/* Footer */
.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: 40px 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 18px;
    font-weight: 600;
}

.footer-logo-img {
    height: 36px;
    width: auto;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 13px;
}

.footer-oss {
    color: var(--accent-primary) !important;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

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

    .hero-logo {
        width: 140px;
    }

    .section {
        padding: 60px 0;
    }

    .projects-grid,
    .donate-cards {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        gap: 20px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }

    .donate-address {
        flex-direction: column;
        gap: 12px;
    }

    .donate-address code {
        text-align: center;
        font-size: 11px;
    }
}

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

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

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

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

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