:root {
    --c-bg: #0a0e17;
    --c-surface: #0f1420;
    --c-surface-raised: #151c2c;
    --c-border: #1c2538;
    --c-border-hover: #2a3654;
    --c-text: #94a3b8;
    --c-text-dim: #64748b;
    --c-text-bright: #e2e8f0;
    --c-accent: #3b82f6;
    --c-accent-dim: rgba(59, 130, 246, 0.08);
    --c-accent-mid: rgba(59, 130, 246, 0.25);
    --c-accent-glow: rgba(59, 130, 246, 0.6);
    --c-success: #10b981;
    --c-purple: #8b5cf6;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
    --radius: 12px;
    --radius-sm: 8px;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    scrollbar-width: thin;
    scrollbar-color: var(--c-accent) var(--c-bg);
}

body {
    font-family: var(--font-body);
    background: var(--c-bg);
    color: var(--c-text);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--c-bg); }
::-webkit-scrollbar-thumb { background: var(--c-border-hover); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--c-accent); }

::selection {
    background: var(--c-accent);
    color: white;
}

.container {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ═══════════ SCROLL PROGRESS ═══════════ */

.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--c-accent), var(--c-purple));
    z-index: 10000;
    transform-origin: left;
    transform: scaleX(0);
    will-change: transform;
}

/* ═══════════ REVEAL ANIMATIONS ═══════════ */

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* ═══════════ HEADER ═══════════ */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    background: rgba(10, 14, 23, 0.8);
    backdrop-filter: blur(20px) saturate(1.4);
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s, padding 0.3s, background 0.3s;
}

.site-header.scrolled {
    border-bottom-color: var(--c-border);
    padding: 10px 0;
    background: rgba(10, 14, 23, 0.95);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--c-text-bright);
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: -0.01em;
}

.logo-mark {
    color: var(--c-accent);
}

.nav-status {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--c-success);
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.status-dot {
    width: 6px;
    height: 6px;
    background: var(--c-success);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
    box-shadow: 0 0 8px rgba(16, 185, 129, 0.6);
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.7); }
}

/* ═══════════ HERO ═══════════ */

.hero {
    min-height: 70vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding: 140px 0 80px;
}

.hero-grid-bg {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(59, 130, 246, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59, 130, 246, 0.03) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 20%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 20%, transparent 70%);
}

.hero-glow {
    position: absolute;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.12;
    pointer-events: none;
}

.hero-glow-1 {
    top: -20%;
    right: -10%;
    background: var(--c-accent);
}

.hero-glow-2 {
    bottom: -30%;
    left: -15%;
    background: var(--c-purple);
    opacity: 0.08;
}

.hero-content {
    position: relative;
    z-index: 2;
    width: 100%;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border: 1px solid var(--c-accent-mid);
    background: var(--c-accent-dim);
    border-radius: 100px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.04em;
    color: var(--c-accent);
    margin-bottom: 32px;
}

.hero-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--c-accent);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

.hero-title {
    font-size: clamp(2rem, 6vw, 3.5rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    color: var(--c-text-bright);
    margin-bottom: 20px;
}

.hero-title .line {
    display: block;
    overflow: hidden;
}

.hero-title .line span {
    display: block;
    transform: translateY(110%);
    animation: line-reveal 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.hero-title .line:nth-child(2) span {
    animation-delay: 0.12s;
}

@keyframes line-reveal {
    to { transform: translateY(0); }
}

.hero-title .accent {
    background: linear-gradient(135deg, var(--c-accent), var(--c-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(0.95rem, 1.5vw, 1.1rem);
    font-weight: 400;
    color: var(--c-text-dim);
    max-width: 560px;
    line-height: 1.8;
    margin-bottom: 40px;
    opacity: 0;
    animation: fade-up 0.7s 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes fade-up {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

.hero-metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--c-border);
    border-radius: var(--radius);
    overflow: hidden;
    opacity: 0;
    animation: fade-up 0.7s 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.metric {
    background: var(--c-surface);
    padding: 20px 16px;
    text-align: center;
}

.metric-value {
    font-family: var(--font-mono);
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--c-accent);
    letter-spacing: -0.02em;
}

.metric-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--c-text-dim);
    margin-top: 4px;
}

/* ═══════════ API SECTIONS ═══════════ */

#samples {
    padding: 40px 0 80px;
}

.api-section {
    margin-bottom: 48px;
}

.api-section:last-child {
    margin-bottom: 0;
}

.section-header {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--c-border);
}

.section-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--c-accent-dim);
    border: 1px solid var(--c-accent-mid);
    border-radius: var(--radius-sm);
    color: var(--c-accent);
    flex-shrink: 0;
}

.section-meta {
    flex: 1;
    min-width: 0;
}

.section-meta .section-label {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--c-accent);
    margin-bottom: 4px;
}

.section-meta .section-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--c-text-bright);
    letter-spacing: -0.02em;
    margin-bottom: 4px;
}

.section-meta .section-desc {
    font-size: 0.85rem;
    color: var(--c-text-dim);
    line-height: 1.5;
}

.section-brand {
    height: 24px;
    width: auto;
    opacity: 0.7;
    align-self: center;
    flex-shrink: 0;
}

.section-brand--payflow {
    height: 32px;
}

/* ═══════════ API LINKS ═══════════ */

.link-grid {
    display: flex;
    flex-direction: column;
    gap: 2px;
    background: var(--c-border);
    border-radius: var(--radius);
    overflow: hidden;
}

.api-link {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 20px;
    background: var(--c-surface);
    text-decoration: none;
    color: var(--c-text);
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.api-link:hover {
    background: var(--c-surface-raised);
    padding-left: 24px;
}

.api-link:hover .api-link-icon {
    color: var(--c-accent);
    border-color: var(--c-accent-mid);
    background: var(--c-accent-dim);
}

.api-link:hover .api-link-name {
    color: var(--c-text-bright);
}

.api-link:hover .api-link-arrow {
    opacity: 1;
    transform: translateX(0);
    color: var(--c-accent);
}

.api-link-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-sm);
    color: var(--c-text-dim);
    flex-shrink: 0;
    transition: all 0.2s;
}

.api-link-content {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.api-link-name {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--c-text);
    transition: color 0.2s;
}

.api-link-method {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    padding: 2px 8px;
    background: var(--c-accent-dim);
    color: var(--c-accent);
    border-radius: 4px;
    text-transform: uppercase;
    flex-shrink: 0;
}

.api-link-arrow {
    opacity: 0;
    transform: translateX(-6px);
    transition: all 0.2s;
    flex-shrink: 0;
    color: var(--c-text-dim);
}

/* ═══════════ FORTUNE BLOCK ═══════════ */

.api-section--accent {
    margin-bottom: 48px;
}

.fortune-block {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 28px 28px;
    background: linear-gradient(135deg, var(--c-accent-dim), rgba(139, 92, 246, 0.06));
    border: 1px solid var(--c-accent-mid);
    border-radius: var(--radius);
    text-decoration: none;
    color: var(--c-text);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.fortune-block:hover {
    border-color: var(--c-accent);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.12), rgba(139, 92, 246, 0.1));
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(59, 130, 246, 0.15);
}

.fortune-block:hover .api-link-arrow {
    opacity: 1;
    transform: translateX(0);
    color: var(--c-accent);
}

.fortune-inner {
    display: flex;
    align-items: center;
    gap: 16px;
    color: var(--c-accent);
}

.fortune-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--c-text-bright);
    margin-bottom: 2px;
}

.fortune-desc {
    font-size: 0.8rem;
    color: var(--c-text-dim);
}

/* ═══════════ FOOTER ═══════════ */

.site-footer {
    border-top: 1px solid var(--c-border);
    padding: 32px 0;
}

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

.footer-credit {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--c-text-dim);
}

.footer-tech {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--c-text-dim);
    opacity: 0.6;
}

/* ═══════════ RESPONSIVE ═══════════ */

@media (max-width: 640px) {
    .hero {
        min-height: auto;
        padding: 120px 0 60px;
    }

    .hero-metrics {
        grid-template-columns: 1fr;
    }

    .section-header {
        flex-wrap: wrap;
    }

    .section-brand {
        display: none;
    }

    .api-link-content {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }

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