:root {
    --bg: #0d1117;
    --bg-secondary: #161b22;
    --text: #e6edf3;
    --text-muted: #8b949e;
    --accent: #7ee787;
    --accent-green: #3fb950;
    --border: #30363d;
    --glow-green: rgba(63, 185, 80, 0.4);
    --glow-blue: rgba(126, 231, 135, 0.3);
}

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

html {
    scroll-behavior: smooth;
}

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

/* Multi-layer animated gradient background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 120%;
    height: 120%;
    background: 
        radial-gradient(ellipse 800px 600px at 20% 20%, rgba(63, 185, 80, 0.12) 0%, transparent 50%),
        radial-gradient(ellipse 600px 800px at 80% 80%, rgba(126, 231, 135, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(63, 185, 80, 0.03) 0%, transparent 60%);
    pointer-events: none;
    z-index: -1;
    animation: background-flow 28s ease-in-out infinite;
    filter: blur(40px);
}

body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 15% 30%, rgba(126, 231, 135, 0.4) 0%, transparent 2%),
        radial-gradient(circle at 85% 70%, rgba(63, 185, 80, 0.5) 0%, transparent 2%),
        radial-gradient(circle at 45% 85%, rgba(126, 231, 135, 0.3) 0%, transparent 1.5%),
        radial-gradient(circle at 70% 15%, rgba(63, 185, 80, 0.4) 0%, transparent 1.8%),
        radial-gradient(circle at 25% 60%, rgba(126, 231, 135, 0.35) 0%, transparent 2%);
    pointer-events: none;
    z-index: -1;
    animation: particles-float 35s ease-in-out infinite;
    opacity: 0.6;
}

@keyframes background-flow {
    0%, 100% {
        transform: translate(-5%, -5%) scale(1) rotate(0deg);
    }
    25% {
        transform: translate(-8%, -3%) scale(1.03) rotate(0.5deg);
    }
    50% {
        transform: translate(-3%, -7%) scale(1.01) rotate(-0.5deg);
    }
    75% {
        transform: translate(-7%, -4%) scale(1.02) rotate(0.3deg);
    }
}

@keyframes particles-float {
    0%, 100% {
        transform: translate(0, 0);
    }
    25% {
        transform: translate(30px, -20px);
    }
    50% {
        transform: translate(-20px, 30px);
    }
    75% {
        transform: translate(15px, 10px);
    }
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Documentation layout */
.doc {
    padding: 24px 0 48px;
}

.doc h1 {
    margin-bottom: 8px;
}

.doc .version {
    color: var(--text-muted);
    margin-bottom: 24px;
}

.toc {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px;
    margin: 16px 0 24px;
}

.toc strong {
    display: block;
    margin-bottom: 8px;
    color: var(--text);
}

.toc a {
    display: block;
    padding: 6px 0;
    color: var(--text-muted);
    text-decoration: none;
}

.toc a:hover {
    color: var(--accent);
}

.grid {
    display: grid;
    gap: 20px;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    margin-bottom: 12px;
}

.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px;
    min-height: 120px;
}

.card h3 {
    margin: 0 0 10px 0;
    font-size: 1.05rem;
    color: var(--text);
}

.muted { color: var(--text-muted); }

.badge {
    display: inline-block;
    background: rgba(126, 231, 135, 0.15);
    color: var(--accent);
    border-radius: 12px;
    padding: 2px 8px;
    font-size: 0.8rem;
    margin-left: 6px;
}

.cmd {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 14px 18px;
    font-family: 'Consolas', 'Monaco', monospace;
    line-height: 1.5;
    color: var(--text);
}

header {
    padding: 80px 0 60px;
    text-align: center;
    border-bottom: 1px solid var(--border);
    position: relative;
    backdrop-filter: blur(10px) saturate(150%);
    background: linear-gradient(180deg, rgba(13, 17, 23, 0.8) 0%, rgba(13, 17, 23, 0.4) 100%);
}

.logo {
    font-size: 4rem;
    margin-bottom: 16px;
    animation: float 3s ease-in-out infinite, logo-glow 4s ease-in-out infinite;
    display: inline-block;
    filter: drop-shadow(0 0 20px var(--glow-green));
}

@keyframes logo-glow {
    0%, 100% {
        filter: drop-shadow(0 0 20px rgba(126, 231, 135, 0.4));
    }
    50% {
        filter: drop-shadow(0 0 35px rgba(126, 231, 135, 0.6)) drop-shadow(0 0 50px rgba(63, 185, 80, 0.3));
    }
}

.logo svg {
    width: 80px;
    height: 80px;
}

/* Feature icons */
.icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    filter: drop-shadow(0 0 6px var(--glow-green));
    transition: transform 0.3s ease, filter 0.3s ease;
}

.feature:hover .icon {
    transform: scale(1.1);
    filter: drop-shadow(0 0 10px var(--glow-green));
}

/* Inline icons (footer) */
.icon-inline {
    width: 16px;
    height: 16px;
    vertical-align: middle;
    display: inline-block;
    margin: 0 2px;
}

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

h1 {
    font-size: 3rem;
    font-weight: 600;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--text) 0%, var(--accent-green) 30%, var(--accent) 60%, var(--accent-green) 100%);
    background-size: 300% 300%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradient-shift 8s ease infinite;
    filter: drop-shadow(0 0 20px rgba(126, 231, 135, 0.3));
    position: relative;
}

@keyframes gradient-shift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.tagline {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 32px;
    opacity: 0;
    animation: fade-in-up 0.8s ease forwards 0.3s;
}

.tagline-note {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: -20px;
    margin-bottom: 24px;
    opacity: 0;
    animation: fade-in-up 0.8s ease forwards 0.4s;
}

@keyframes fade-in-up {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
    animation: fade-in-up 0.8s ease forwards 0.5s;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.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;
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--accent-green) 0%, #2ea043 100%);
    color: #fff;
    box-shadow: 0 4px 15px rgba(63, 185, 80, 0.4), 0 0 20px rgba(126, 231, 135, 0.3);
    position: relative;
    overflow: hidden;
}

.btn-primary::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-primary:hover::after {
    width: 300px;
    height: 300px;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #2ea043 0%, var(--accent-green) 100%);
    transform: translateY(-3px);
    box-shadow: 
        0 6px 25px rgba(63, 185, 80, 0.5),
        0 0 40px rgba(126, 231, 135, 0.4),
        0 15px 40px rgba(0,0,0,0.3);
}

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

.btn-secondary:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 0 22px var(--glow-green);
}

section {
    padding: 60px 0;
    border-bottom: 1px solid var(--border);
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

section.visible {
    opacity: 1;
    transform: translateY(0);
}

h2 {
    font-size: 1.75rem;
    margin-bottom: 24px;
    color: var(--text);
    position: relative;
    display: inline-block;
}

h2::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-green), var(--accent));
    transition: width 0.4s ease;
}

section.visible h2::after {
    width: 100%;
}

p {
    color: var(--text-muted);
    margin-bottom: 16px;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin-top: 32px;
}

.feature {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(22, 27, 34, 0.8) 100%);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1), border-color 0.3s ease, box-shadow 0.4s ease;
    position: relative;
    overflow: hidden;
    will-change: transform, box-shadow;
    backdrop-filter: blur(10px);
}

.feature::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(126, 231, 135, 0.15), transparent 60%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.feature::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent 30%, rgba(126, 231, 135, 0.08) 50%, transparent 70%);
    transform: rotate(45deg) translateX(-100%);
    transition: transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.feature:hover {
    transform: translateY(-8px) scale(1.03);
    border-color: var(--accent);
    box-shadow: 
        0 15px 50px rgba(0, 0, 0, 0.4),
        0 0 30px rgba(126, 231, 135, 0.3),
        inset 0 1px 0 rgba(126, 231, 135, 0.2);
}

.feature:hover::before {
    opacity: 1;
}

.feature:hover::after {
    transform: rotate(45deg) translateX(100%);
}

.feature h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
    position: relative;
    z-index: 1;
}

.feature p {
    font-size: 0.9rem;
    margin: 0;
    position: relative;
    z-index: 1;
}

.code-block {
    background: linear-gradient(135deg, rgba(22, 27, 34, 0.95) 0%, rgba(13, 17, 23, 0.9) 100%);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    overflow-x: auto;
    margin: 16px 0;
    position: relative;
    transition: border-color 0.3s ease, box-shadow 0.4s ease, transform 0.3s ease;
    backdrop-filter: blur(12px) saturate(180%);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.code-block::before {
    content: 'Click to copy';
    position: absolute;
    top: 8px;
    right: 8px;
    font-size: 0.7rem;
    color: var(--text-muted);
    opacity: 0;
    transition: opacity 0.2s;
    background: var(--bg);
    padding: 4px 8px;
    border-radius: 4px;
}

.code-block:hover::before {
    opacity: 1;
}

.code-block:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 
        0 0 25px rgba(126, 231, 135, 0.3),
        0 8px 30px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(126, 231, 135, 0.1);
}

.code-block.copied {
    border-color: var(--accent-green) !important;
    box-shadow: 0 0 20px var(--glow-green) !important;
}

.code-block.copied::before {
    content: '✓ Copied!';
    color: var(--accent-green);
    opacity: 1;
}

code {
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.9rem;
    color: var(--text);
}

.highlight {
    color: var(--accent);
}

.personal-note {
    background: linear-gradient(135deg, #1a1f2e 0%, #161b22 100%);
    border-left: 4px solid var(--accent);
    padding: 32px;
    border-radius: 0 12px 12px 0;
    margin: 32px 0;
    position: relative;
    overflow: hidden;
    box-shadow: 
        0 8px 32px rgba(0, 0, 0, 0.3),
        inset 0 0 60px rgba(126, 231, 135, 0.05);
    backdrop-filter: blur(8px);
}

.personal-note::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent 40%, rgba(126, 231, 135, 0.05) 50%, transparent 60%);
    animation: shimmer 8s linear infinite;
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%) translateY(-100%) rotate(45deg);
    }
    100% {
        transform: translateX(100%) translateY(100%) rotate(45deg);
    }
}

.personal-note::before {
    content: '"';
    position: absolute;
    top: 10px;
    left: 20px;
    font-size: 4rem;
    color: var(--accent);
    opacity: 0.2;
    font-family: Georgia, serif;
}

.personal-note h3 {
    color: var(--text);
    margin-bottom: 16px;
    font-size: 1.25rem;
}

.personal-note p {
    color: var(--text-muted);
    font-style: italic;
    position: relative;
    z-index: 1;
}

.comparison {
    margin-top: 24px;
}

.comparison table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 16px;
}

.comparison th,
.comparison td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    transition: background 0.2s;
}

.comparison tr:hover td {
    background: rgba(126, 231, 135, 0.08);
}

.comparison th {
    color: var(--text);
    font-weight: 600;
}

.comparison td {
    color: var(--text-muted);
}

.check {
    color: var(--accent-green);
    text-shadow: 0 0 10px var(--glow-green);
}

footer {
    padding: 40px 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
    position: relative;
    backdrop-filter: blur(4px);
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-green), transparent);
}

footer a {
    color: var(--accent);
    text-decoration: none;
    transition: all 0.2s;
    position: relative;
}

footer a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--accent);
    transition: width 0.3s;
}

footer a:hover {
    color: var(--accent);
    text-shadow: 0 0 12px var(--glow-green);
}

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

::selection {
    background: var(--accent-green);
    color: #fff;
}

::-moz-selection {
    background: var(--accent-green);
    color: #fff;
}

@media (max-width: 600px) {
    header {
        padding: 40px 0;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .logo {
        font-size: 3rem;
    }

    .container {
        max-width: 100%;
        padding: 0 16px;
    }

    .features,
    .grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .buttons .btn {
        padding: 14px 20px;
        border-radius: 10px;
        width: 100%;
        justify-content: center;
    }

    .code-block {
        font-size: 0.95rem;
        padding: 16px;
        -webkit-overflow-scrolling: touch;
    }
}

/* Respect reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
    }
    body::before {
        animation: none !important;
        opacity: 0.9 !important;
    }
}