:root {
    --ink: #152820;
    --ink-soft: #2c453a;
    --parchment: #ebe3d4;
    --parchment-deep: #d8cdb8;
    --paper: #f4eee4;
    --accent: #1f7a66;
    --accent-bright: #2ea88a;
    --line: rgba(21, 40, 32, 0.14);
    --font-display: "Syne", sans-serif;
    --font-body: "Outfit", sans-serif;
    --space: clamp(1.25rem, 3vw, 2.5rem);
    --max: 1120px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--ink);
    font-family: var(--font-body);
    font-size: 1.0625rem;
    line-height: 1.55;
    background:
        radial-gradient(1200px 700px at 85% -10%, rgba(46, 168, 138, 0.18), transparent 55%),
        radial-gradient(900px 600px at -10% 20%, rgba(21, 40, 32, 0.08), transparent 50%),
        linear-gradient(160deg, #f0e8d8 0%, var(--parchment) 42%, #e4dccb 100%);
    min-height: 100vh;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    opacity: 0.35;
    background-image:
        linear-gradient(rgba(21, 40, 32, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(21, 40, 32, 0.03) 1px, transparent 1px);
    background-size: 48px 48px;
    z-index: 0;
}

.page {
    position: relative;
    z-index: 1;
}

a {
    color: inherit;
    text-decoration-thickness: 1px;
    text-underline-offset: 0.2em;
}

.top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    max-width: var(--max);
    margin: 0 auto;
    padding: 1.25rem var(--space);
}

.brand-mark {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.15rem;
    letter-spacing: -0.03em;
    text-decoration: none;
}

.top-nav {
    display: flex;
    gap: 1.5rem;
    font-size: 0.95rem;
    font-weight: 500;
}

.top-nav a {
    text-decoration: none;
    opacity: 0.78;
    transition: opacity 0.2s ease;
}

.top-nav a:hover {
    opacity: 1;
}

/* —— Hero: one composition —— */
.hero {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: center;
    gap: clamp(1.5rem, 4vw, 3rem);
    max-width: var(--max);
    margin: 0 auto;
    padding: clamp(1.5rem, 5vh, 3.5rem) var(--space) clamp(3rem, 8vh, 5rem);
    min-height: calc(100vh - 4.5rem);
}

.hero-copy {
    max-width: 34rem;
    opacity: 0;
    transform: translateY(22px);
    transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.hero-copy.is-in {
    opacity: 1;
    transform: none;
}

.brand-hero {
    margin: 0 0 0.85rem;
    font-family: var(--font-display);
    font-weight: 800;
    font-size: clamp(2.6rem, 7vw, 4.4rem);
    line-height: 0.95;
    letter-spacing: -0.045em;
    color: var(--ink);
}

.hero h1 {
    margin: 0 0 1rem;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(1.35rem, 2.6vw, 1.85rem);
    line-height: 1.2;
    letter-spacing: -0.025em;
    color: var(--ink-soft);
    max-width: 22ch;
}

.hero-lead {
    margin: 0 0 1.75rem;
    font-size: 1.08rem;
    color: var(--ink-soft);
    max-width: 38ch;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 1rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.85rem 1.35rem;
    font-family: var(--font-body);
    font-size: 0.98rem;
    font-weight: 600;
    border-radius: 0.35rem;
    text-decoration: none;
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.btn:hover {
    transform: translateY(-1px);
}

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

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

.btn-ghost {
    background: transparent;
    color: var(--ink);
    border: 1px solid var(--line);
}

.btn-ghost:hover {
    border-color: var(--ink);
}

.hero-visual {
    position: relative;
    min-height: clamp(280px, 52vh, 480px);
    opacity: 0;
    transform: translateX(28px);
    transition: opacity 0.9s ease 0.12s, transform 0.9s cubic-bezier(0.2, 0.8, 0.2, 1) 0.12s;
}

.hero-visual.is-in {
    opacity: 1;
    transform: none;
}

.hero-art {
    width: 100%;
    height: auto;
    display: block;
}

.sheet-front {
    transform-origin: 50% 50%;
    animation: float-sheet 6.5s ease-in-out infinite;
}

.sheet-mid {
    animation: float-sheet 7.2s ease-in-out infinite 0.4s;
}

.sheet-back {
    animation: float-sheet 8s ease-in-out infinite 0.8s;
}

@keyframes float-sheet {
    0%, 100% { translate: 0 0; }
    50% { translate: 0 -10px; }
}

.scan-beam {
    position: absolute;
    left: 8%;
    right: 8%;
    top: 12%;
    height: 3px;
    border-radius: 2px;
    background: linear-gradient(90deg, transparent, var(--accent-bright), transparent);
    opacity: 0.75;
    animation: scan 3.8s ease-in-out infinite;
    pointer-events: none;
    z-index: 2;
}

@keyframes scan {
    0% { top: 14%; opacity: 0; }
    15% { opacity: 0.8; }
    85% { opacity: 0.8; }
    100% { top: 78%; opacity: 0; }
}

/* —— Capability sections —— */
.capability {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(1.5rem, 4vw, 3.5rem);
    align-items: center;
    max-width: var(--max);
    margin: 0 auto;
    padding: clamp(3.5rem, 9vh, 6rem) var(--space);
    border-top: 1px solid var(--line);
}

.capability-alt {
    direction: ltr;
}

.eyebrow {
    margin: 0 0 0.65rem;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--accent);
}

.capability h2,
.api h2 {
    margin: 0 0 1rem;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(1.7rem, 3.2vw, 2.35rem);
    line-height: 1.15;
    letter-spacing: -0.03em;
    max-width: 16ch;
}

.capability-copy p:not(.eyebrow) {
    margin: 0;
    color: var(--ink-soft);
    max-width: 38ch;
}

.capability-panel {
    border: 1px solid var(--line);
    background: rgba(244, 238, 228, 0.72);
    backdrop-filter: blur(6px);
    min-height: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

.panel-codes {
    border-left: 4px solid var(--accent);
}

.code-sample {
    margin: 0;
    width: 100%;
    font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
    font-size: 0.82rem;
    line-height: 1.55;
    color: var(--ink);
    white-space: pre-wrap;
}

.split-stack {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
    width: min(100%, 280px);
}

.split-stack span,
.split-stack strong {
    display: block;
    padding: 0.85rem 1rem;
    border: 1px solid var(--line);
    background: var(--paper);
    font-size: 0.92rem;
    font-weight: 500;
}

.split-stack strong {
    background: var(--ink);
    color: var(--paper);
    border-color: var(--ink);
    margin-top: 0.35rem;
}

/* —— API —— */
.api {
    max-width: var(--max);
    margin: 0 auto;
    padding: clamp(3.5rem, 9vh, 6rem) var(--space);
    border-top: 1px solid var(--line);
}

.api-lead {
    margin: 0 0 2rem;
    color: var(--ink-soft);
    max-width: 42ch;
}

.api-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem 2.5rem;
}

.api-grid article {
    padding-top: 1.25rem;
    border-top: 2px solid var(--ink);
}

.api-grid h3 {
    margin: 0 0 0.65rem;
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 700;
}

.api-grid code {
    font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
    font-size: 0.92em;
}

.api-grid p {
    margin: 0;
    color: var(--ink-soft);
}

.foot {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 0.75rem 1.5rem;
    max-width: var(--max);
    margin: 0 auto;
    padding: 1.75rem var(--space) 2.5rem;
    border-top: 1px solid var(--line);
    font-size: 0.9rem;
    color: var(--ink-soft);
}

@media (max-width: 880px) {
    .hero {
        grid-template-columns: 1fr;
        min-height: auto;
        padding-top: 1.5rem;
    }

    .hero-visual {
        order: -1;
        min-height: 240px;
        transform: translateY(16px);
    }

    .hero-visual.is-in {
        transform: none;
    }

    .brand-hero {
        font-size: clamp(2.4rem, 12vw, 3.4rem);
    }

    .capability,
    .api-grid {
        grid-template-columns: 1fr;
    }

    .capability-alt .capability-panel {
        order: -1;
    }
}

@media (max-width: 520px) {
    .top-nav {
        gap: 1rem;
        font-size: 0.88rem;
    }

    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }

    .hero-copy,
    .hero-visual {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .sheet-front,
    .sheet-mid,
    .sheet-back,
    .scan-beam {
        animation: none;
    }
}