body {
    background-color: #05070a;
    color: #e2e8f0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    line-height: 1.6;
    overflow-x: hidden;
}

:root {
    --primary: #00ff88;
    --primary-dark: #00cc6e;
    --secondary: #0a192f;
    --accent: #64ffda;
    --bg-dark: #020617;
    --card-bg: #0f172a;
    --text-muted: #94a3b8;
    --gradient-hero: linear-gradient(135deg, #020617 0%, #0f172a 100%);
    --shadow: 0 10px 30px -15px rgba(2, 6, 23, 0.7);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Typography */
h1, h2, h3 {
    font-weight: 800;
    color: #f8fafc;
    letter-spacing: -0.025em;
}

.text-center { text-align: center; }

/* Navigation */
nav {
    background: rgba(2, 6, 23, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: #fff;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo span { color: var(--primary); }

.nav-links {
    list-style: none;
    display: flex;
    gap: 2rem;
    align-items: center;
    margin: 0;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

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

/* Hero Section */
.hero {
    background: var(--gradient-hero);
    padding: 8rem 0 6rem;
    position: relative;
    overflow: hidden;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 80% 20%, rgba(0, 255, 136, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: center;
}

.hero h1 {
    font-size: 4rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    background: linear-gradient(to right, #fff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero .subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 600px;
}

.hero-btns {
    display: flex;
    gap: 1rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--primary);
    color: #05070a;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0, 255, 136, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

.btn-outline {
    border: 1px solid var(--primary);
    color: var(--primary);
}

/* Features Grid */
.features {
    padding: 6rem 0;
    background: #020617;
}

.section-tag {
    color: var(--primary);
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.1em;
    font-size: 0.875rem;
    margin-bottom: 1rem;
    display: block;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
}

.feature-card {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all 0.3s;
    text-align: left;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 255, 136, 0.2);
    box-shadow: var(--shadow);
}

.feature-card .icon {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    display: block;
}

/* Checkpoints Grid */
.checkpoints {
    padding: 6rem 0;
    background: #05070a;
}

.checkpoint-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.checkpoint-box {
    background: rgba(15, 23, 42, 0.5);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid rgba(255, 255, 255, 0.03);
}

.checkpoint-box h4 {
    color: var(--primary);
    margin-bottom: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding-bottom: 0.5rem;
}

.checkpoint-list {
    list-style: none;
    padding: 0;
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.checkpoint-list li {
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.checkpoint-list li::before {
    content: '✓';
    color: var(--primary);
}

/* API Docs & Code */
.api-docs {
    padding: 6rem 0;
    background: #020617;
}

.tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.tab {
    padding: 0.5rem 1rem;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-muted);
    border-radius: 4px;
    cursor: pointer;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.875rem;
}

.tab.active {
    background: var(--primary);
    color: #05070a;
    border-color: var(--primary);
}

.code-window {
    background: #010409;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}

.code-header {
    background: #0d1117;
    padding: 0.75rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}
.dot:nth-child(1) { background: #ff5f56; }
.dot:nth-child(2) { background: #ffbd2e; }
.dot:nth-child(3) { background: #27c93f; }

.lang-label {
    margin-left: auto;
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
}

pre {
    margin: 0;
    padding: 2rem;
    overflow-x: auto;
    font-family: 'JetBrains Mono', monospace;
}

code {
    color: #e6edf3;
    font-size: 0.95rem;
}

.code-keyword { color: #ff7b72; }
.code-string { color: #a5d6ff; }
.code-comment { color: #8b949e; }
.code-func { color: #d2a8ff; }

/* Pricing */
.pricing {
    padding: 6rem 0;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
}

.price-card {
    background: var(--card-bg);
    padding: 3rem;
    border-radius: 16px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.price-card.featured {
    background: linear-gradient(180deg, #1e293b 0%, #0f172a 100%);
    border: 1px solid var(--primary);
    transform: scale(1.05);
}

.price {
    font-size: 3.5rem;
    font-weight: 800;
    margin: 1.5rem 0;
}

.price span {
    font-size: 1rem;
    color: var(--text-muted);
}

/* Footer */
footer {
    padding: 4rem 0;
    background: #020617;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 4rem;
}

.footer-info p {
    color: var(--text-muted);
    max-width: 300px;
}

.footer-links h4 {
    margin-bottom: 1.5rem;
    font-size: 1rem;
}

.footer-links ul {
    list-style: none;
    padding: 0;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-links a:hover { color: #fff; }

.impressum {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Responsive */
@media (max-width: 968px) {
    .hero-grid { grid-template-columns: 1fr; text-align: center; }
    .hero h1 { font-size: 3rem; }
    .hero .subtitle { margin-inline: auto; }
    .hero-btns { justify-content: center; }
    .hero-visual { display: none; }
    .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.feature-card, .price-card, .hero-text {
    animation: fadeIn 0.8s ease-out forwards;
}