/* Skenra — Motion 3D
   Marketing site. Visual identity shared with artetcode.com / vjhardy.art:
   velvet black, white, egg yolk yellow. Plain CSS, no build step. */

/* Google Font - Source Sans Pro */
@import url('https://fonts.googleapis.com/css2?family=Source+Sans+Pro:wght@200;300;400;600;700&display=swap');

:root {
    --bg-primary: #141414;     /* velvet black */
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #222222;    /* cards */
    --text-primary: #ffffff;
    --text-secondary: #ffffff;
    --text-muted: #999999;
    --accent: #f5c518;         /* egg yolk yellow */
    --accent-soft: rgba(245, 197, 24, 0.12);
    --border: #2a2a2a;
    --font-main: 'Source Sans Pro', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    --max-width: 960px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    font-size: 16px;
    font-weight: 300;
    overflow-x: hidden;
}

a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* --- Layout --- */

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

section {
    padding: 6rem 0;
    scroll-margin-top: 80px;       /* offset fixed header for anchor jumps */
}

section + section {
    border-top: 1px solid var(--border);
}

.eyebrow {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: var(--accent);
    margin-bottom: 1rem;
}

h2 {
    font-size: 1.6rem;
    font-weight: 300;
    letter-spacing: 0.5px;
    margin-bottom: 1.25rem;
}

.section-intro {
    max-width: 620px;
    color: var(--text-secondary);
    font-size: 1.05rem;
}

p + p {
    margin-top: 16px;
}

/* --- Buttons --- */

.btn {
    display: inline-block;
    padding: 0.9rem 2.2rem;
    border: 1px solid var(--accent);
    color: var(--accent);
    background: transparent;
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

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

.btn-primary:hover {
    background-color: #ffd84d;
    border-color: #ffd84d;
    color: var(--bg-primary);
}

.btn-ghost {
    border-color: var(--border);
    color: var(--text-primary);
}

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

/* --- Header / Nav --- */

header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(20, 20, 20, 0.92);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}

.header-inner {
    max-width: 1120px;
    margin: 0 auto;
    padding: 1.1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
}

.logo {
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: 0.32em;
    text-transform: uppercase;
    color: var(--text-primary);
    white-space: nowrap;
}

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

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

.nav-right {
    display: flex;
    align-items: center;
    gap: 1.75rem;
}

nav.nav-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

nav.nav-links a {
    color: var(--text-secondary);
    font-size: 0.78rem;
    font-weight: 400;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    position: relative;
}

nav.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--accent);
    transition: width 0.3s ease;
}

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

nav.nav-links a:hover::after {
    width: 100%;
}

.nav-cta {
    padding: 0.6rem 1.4rem;
    font-size: 0.72rem;
}

.lang-switch {
    display: flex;
    gap: 0.4rem;
    padding-left: 1.4rem;
    border-left: 1px solid var(--border);
}

.lang-switch button {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.78rem;
    letter-spacing: 1px;
    font-family: var(--font-main);
    transition: color 0.3s ease;
}

.lang-switch button.active,
.lang-switch button:hover {
    color: var(--accent);
}

/* Mobile nav toggle */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
    width: 38px;
    height: 38px;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    margin: 4px auto;
    background: var(--text-primary);
    transition: all 0.3s ease;
}

.nav-toggle.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* --- Hero --- */

.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 130px 24px 5rem;
    border-bottom: 1px solid var(--border);
}

.hero .eyebrow {
    margin-bottom: 1.5rem;
}

.hero h1 {
    font-size: clamp(3rem, 11vw, 6rem);
    font-weight: 200;
    letter-spacing: -1px;
    line-height: 1;
    margin-bottom: 1.5rem;
}

.hero h1 .accent {
    color: var(--accent);
}

.hero .subtitle {
    font-size: clamp(1rem, 2.4vw, 1.25rem);
    color: var(--text-secondary);
    font-weight: 300;
    max-width: 640px;
    margin: 0 auto;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 2.5rem;
}

/* Intro video placeholder */
.video-placeholder {
    position: relative;
    width: 100%;
    max-width: 820px;
    aspect-ratio: 16 / 9;
    margin: 3.5rem auto 0;
    background:
        radial-gradient(circle at 50% 40%, rgba(245, 197, 24, 0.08), transparent 60%),
        var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 6px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 14px;
    overflow: hidden;
}

.video-placeholder .play {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    border: 1px solid var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.video-placeholder:hover .play {
    background: var(--accent);
}

.video-placeholder .play svg { fill: var(--accent); transition: fill 0.3s ease; }
.video-placeholder:hover .play svg { fill: var(--bg-primary); }

.video-placeholder .placeholder-label {
    font-size: 0.72rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--text-muted);
}

/* --- Interactive presentation embed --- */

.presentation {
    margin: 3rem 0 0;
}

.presentation-frame {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    background:
        radial-gradient(circle at 50% 40%, rgba(245, 197, 24, 0.07), transparent 65%),
        var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 6px;
    overflow: hidden;
    transition: border-color 0.3s ease;
}

.presentation-frame:hover {
    border-color: var(--accent);
}

.presentation-frame iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
    display: block;
}

.presentation-caption {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    justify-content: space-between;
    gap: 0.75rem;
    margin-top: 1rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.presentation-launch {
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.75rem;
    font-weight: 600;
    white-space: nowrap;
}

.presentation-launch:hover {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 3px;
}

/* --- Feature cards --- */

.features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 2.5rem;
}

.feature {
    padding: 2.25rem 2rem;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border);
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.feature:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
}

.feature .feature-icon {
    color: var(--accent);
    margin-bottom: 1rem;
}

.feature h3 {
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 0.3px;
    margin-bottom: 0.6rem;
}

.feature p {
    font-size: 0.92rem;
    color: var(--text-secondary);
    font-weight: 300;
}

/* --- Demos gallery --- */

.demo-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
    margin-top: 2.5rem;
}

.demo-card {
    aspect-ratio: 4 / 3;
    background:
        linear-gradient(135deg, rgba(245, 197, 24, 0.06), transparent 70%),
        var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 4px;
    display: flex;
    align-items: flex-end;
    padding: 1rem 1.25rem;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.demo-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
}

.demo-card span {
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-muted);
}

/* --- Get started: two paths --- */

.paths {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 2.5rem;
}

.path {
    padding: 2.25rem 2rem;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
}

.path .path-tag {
    font-size: 0.7rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 0.75rem;
}

.path h3 {
    font-size: 1.25rem;
    font-weight: 400;
    margin-bottom: 0.5rem;
}

.path p {
    font-size: 0.92rem;
    color: var(--text-secondary);
    font-weight: 300;
    margin-bottom: 1.25rem;
}

.code-block {
    background: #0f0f0f;
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 1rem 1.1rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: #d8d8d8;
    line-height: 1.6;
    overflow-x: auto;
    margin-top: auto;
    white-space: pre;
}

.code-block .tok { color: var(--accent); }

/* --- Docs --- */

.docs-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
    margin-top: 2.5rem;
}

.doc-link {
    display: block;
    padding: 1.75rem 1.5rem;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    transition: border-color 0.3s ease, transform 0.3s ease;
}

.doc-link:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    color: var(--text-primary);
}

.doc-link h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.4rem;
}

.doc-link p {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 300;
}

.doc-link .arrow { color: var(--accent); }

/* --- Access --- */

.access-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 2.5rem;
}

.access-card {
    padding: 2.25rem 2rem;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border);
}

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

.badge {
    display: inline-block;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    padding: 5px 14px;
    border: 1px solid var(--accent);
    border-radius: 3px;
    color: var(--accent);
    margin-bottom: 1rem;
}

.badge.free {
    background: var(--accent);
    color: var(--bg-primary);
}

.access-card h3 {
    font-size: 1.2rem;
    font-weight: 400;
    margin-bottom: 0.5rem;
}

.access-card .price {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.access-card p {
    font-size: 0.92rem;
    color: var(--text-secondary);
    font-weight: 300;
}

.access-card .contact-link {
    margin-top: 1rem;
    display: inline-block;
    font-size: 0.9rem;
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 3px;
}

/* --- Footer --- */

footer {
    border-top: 1px solid var(--border);
    padding: 3rem 2rem 2.5rem;
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.75rem;
    margin-bottom: 1.5rem;
}

.footer-links a {
    font-size: 0.82rem;
    color: var(--text-secondary);
    letter-spacing: 1px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

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

.footer-links svg {
    width: 17px;
    height: 17px;
    vertical-align: middle;
}

footer .copyright {
    font-size: 0.78rem;
    color: var(--text-muted);
    letter-spacing: 1px;
}

/* --- Legal page --- */

.legal {
    padding-top: 130px;
    padding-bottom: 80px;
}

.legal h1 {
    font-size: 1.8rem;
    font-weight: 300;
    margin-bottom: 8px;
}

.legal .legal-meta {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 48px;
}

.legal-section {
    margin-bottom: 36px;
}

.legal-section h2 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.legal-section p,
.legal-section ul {
    font-size: 0.92rem;
    color: var(--text-secondary);
    font-weight: 300;
    line-height: 1.8;
}

.legal-section ul {
    padding-left: 20px;
    margin-top: 8px;
}

.legal-section ul li {
    margin-bottom: 6px;
}

.legal .back-link {
    display: inline-block;
    margin-top: 24px;
    font-size: 0.85rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 1.5px;
}

/* --- Responsive --- */

@media (max-width: 860px) {
    .features,
    .demo-grid,
    .paths,
    .docs-list,
    .access-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .header-inner {
        padding: 1rem 1.25rem;
    }

    .nav-toggle {
        display: block;
    }

    .nav-right {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        background-color: rgba(20, 20, 20, 0.98);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        border-bottom: 1px solid var(--border);
        padding: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.35s ease;
    }

    .nav-right.open {
        max-height: 80vh;
    }

    nav.nav-links {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
    }

    nav.nav-links a {
        padding: 1rem 1.5rem;
        border-bottom: 1px solid var(--border);
    }

    nav.nav-links a::after { display: none; }

    .nav-cta {
        margin: 1rem 1.5rem;
        text-align: center;
    }

    .lang-switch {
        border-left: none;
        padding: 0.75rem 1.5rem 1.25rem;
        justify-content: center;
    }

    section { padding: 4rem 0; }

    .hero { padding: 110px 24px 4rem; }
}