/* ludicoai.com - one stylesheet, no external fonts or scripts (nothing to declare in the privacy policy) */
:root {
    --bg: #0f1016;
    --bg-2: #151622;
    --card: #1c1d29;
    --line: #2d2f40;
    --text: #f3f3f8;
    --muted: #b6b8c8;
    --dim: #8b8da2;
    --brand-1: #667eea;
    --brand-2: #764ba2;
    --accent: #ffb347;
    --good: #a5d6a7;
    --radius: 14px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
}
a { color: #aab4ff; }
a:hover { color: #c9cfff; }
img, svg { max-width: 100%; }
.wrap { max-width: 1100px; margin: 0 auto; padding: 0 20px; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 12px; top: 12px; background: #fff; color: #000; padding: 6px 10px; z-index: 99; }

/* ---- header / footer */
header.site {
    position: sticky; top: 0; z-index: 10;
    background: rgba(15, 16, 22, 0.86);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
}
header.site .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; color: var(--text); text-decoration: none; }
.logo img { width: 32px; height: 32px; }
nav.site { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
nav.site a { color: var(--muted); text-decoration: none; font-size: 15px; }
nav.site a:hover { color: var(--text); }
nav.site .lang { border: 1px solid var(--line); border-radius: 8px; padding: 3px 9px; font-size: 13px; }
footer.site { border-top: 1px solid var(--line); padding: 36px 0 48px; color: var(--dim); font-size: 14px; margin-top: 24px; }
footer.site .wrap { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
footer.site nav a { color: var(--muted); margin-right: 16px; text-decoration: none; display: inline-block; margin-bottom: 6px; }
footer.site nav a:hover { color: var(--text); }

/* ---- buttons */
.btn {
    display: inline-block; padding: 13px 24px; border-radius: 10px; border: 0;
    background: linear-gradient(90deg, var(--brand-1), var(--brand-2));
    color: #fff; text-decoration: none; font-weight: 650; font-size: 16px;
}
.btn:hover { color: #fff; filter: brightness(1.08); }
.btn.ghost { background: transparent; border: 1px solid var(--line); color: var(--text); }
.btn.small { padding: 8px 14px; font-size: 14px; }

/* ---- hero */
.hero { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 48px; align-items: center; padding: 72px 0 40px; }
.hero h1 { font-size: clamp(34px, 5vw, 56px); line-height: 1.08; letter-spacing: -0.02em; margin: 0 0 18px; }
.hero h1 em {
    font-style: normal;
    background: linear-gradient(90deg, var(--accent), #ff7eb3);
    -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lead { color: var(--muted); font-size: 19px; margin: 0 0 28px; }
.cta { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.note { color: var(--dim); font-size: 14px; margin-top: 14px; }
.platforms { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 22px; }
.platform { border: 1px solid var(--line); border-radius: 10px; padding: 8px 12px; font-size: 14px; color: var(--muted); background: var(--bg-2); }
.platform b { color: var(--text); }

/* the scene: a subtitle line and its word card, drawn in CSS */
.scene { position: relative; }
.frame {
    aspect-ratio: 16 / 10; border-radius: 18px; overflow: hidden; position: relative;
    background:
        radial-gradient(ellipse at 70% 30%, rgba(255, 179, 71, 0.22), transparent 55%),
        radial-gradient(ellipse at 20% 80%, rgba(102, 126, 234, 0.35), transparent 60%),
        linear-gradient(160deg, #263247, #0d0f16 70%);
    border: 1px solid var(--line);
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
}
.frame .speaker {
    position: absolute; top: 14px; left: 14px; font-size: 13px; color: #fff;
    background: rgba(0, 0, 0, 0.45); border-radius: 999px; padding: 4px 10px;
}
.frame .subtitle {
    position: absolute; left: 0; right: 0; bottom: 52px; margin: 0; padding: 0 12px; text-align: center;
    font-size: clamp(16px, 2.2vw, 22px); font-weight: 600; color: #fff; text-shadow: 0 2px 6px #000;
}
.frame .subtitle mark { background: rgba(255, 179, 71, 0.9); color: #1b1300; border-radius: 5px; padding: 0 5px; }
.wordcard {
    position: relative; margin: -34px 18px 0 auto; width: min(360px, 92%);
    background: #1f2030; border: 1px solid #3a3d57; border-radius: 14px; padding: 16px 18px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5); font-size: 14.5px;
}
.wordcard .head { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; flex-wrap: wrap; margin-bottom: 8px; }
.wordcard .head b { font-size: 20px; }
.wordcard .tag { color: var(--accent); font-size: 13px; font-weight: 600; }
.wordcard p { margin: 4px 0; color: #d8d9e6; }
.wordcard .k { color: var(--dim); font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; display: block; }
.wordcard .syn { color: var(--good); }
.wordcard .actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.wordcard .actions span { background: #2b2d42; border-radius: 8px; padding: 4px 9px; font-size: 13px; }

/* ---- sections */
section { padding: 56px 0; }
section h2 { font-size: clamp(26px, 3.6vw, 38px); letter-spacing: -0.01em; margin: 0 0 10px; }
.sub { color: var(--muted); margin: 0 0 32px; max-width: 720px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 18px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.card .icon { font-size: 28px; }
.card h3 { margin: 8px 0 8px; font-size: 19px; }
.card p { margin: 0; color: var(--muted); font-size: 15.5px; }
.band { background: var(--bg-2); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip { background: var(--card); border: 1px solid var(--line); border-radius: 999px; padding: 8px 14px; font-size: 15px; }
.steps { counter-reset: step; display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 18px; }
.step { position: relative; padding-left: 48px; }
.step::before {
    counter-increment: step; content: counter(step);
    position: absolute; left: 0; top: 2px; width: 34px; height: 34px; border-radius: 50%;
    background: linear-gradient(135deg, var(--brand-1), var(--brand-2)); display: grid; place-items: center; font-weight: 700;
}
.step h3 { margin: 0 0 6px; font-size: 18px; }
.step p { margin: 0; color: var(--muted); font-size: 15.5px; }

/* ---- pricing */
.pricing { display: grid; grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); gap: 20px; max-width: 860px; }
.plan { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 26px; display: flex; flex-direction: column; }
.plan.premium { border-color: var(--brand-1); box-shadow: 0 0 0 1px var(--brand-1) inset, 0 20px 60px rgba(102, 126, 234, 0.18); }
.plan h3 { margin: 0; font-size: 22px; }
.plan .price { font-size: 38px; font-weight: 800; margin: 10px 0 0; }
.plan .price small { font-size: 16px; font-weight: 500; color: var(--muted); }
.plan .alt { color: var(--muted); font-size: 15px; margin: 2px 0 14px; }
.plan ul { list-style: none; padding: 0; margin: 0 0 22px; flex: 1; }
.plan li { padding: 6px 0 6px 28px; position: relative; color: #dcdde8; font-size: 15.5px; }
.plan li::before { content: "✓"; position: absolute; left: 4px; color: var(--good); font-weight: 700; }
.badge { display: inline-block; background: var(--accent); color: #1b1300; font-size: 12px; font-weight: 700; border-radius: 999px; padding: 2px 9px; margin-left: 8px; vertical-align: middle; }

/* ---- FAQ */
.faq { max-width: 820px; }
.faq details { border-bottom: 1px solid var(--line); padding: 14px 0; }
.faq summary { cursor: pointer; font-weight: 650; font-size: 17.5px; }
.faq details p { color: var(--muted); margin: 10px 0 0; }

/* ---- documents (privacy, terms, legal notice) */
.doc { max-width: 780px; margin: 0 auto; padding: 48px 20px 64px; }
.doc h1 { font-size: clamp(30px, 4.5vw, 40px); line-height: 1.15; margin: 0 0 8px; }
.doc .updated { color: var(--dim); margin: 0 0 28px; font-size: 15px; }
.doc h2 { font-size: 22px; margin: 38px 0 10px; }
.doc h3 { font-size: 18px; margin: 24px 0 8px; }
.doc p, .doc li { color: #dcdde8; }
.doc .summary { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 6px 22px; }
.doc .table { overflow-x: auto; }
.doc table { border-collapse: collapse; width: 100%; font-size: 15px; margin: 8px 0 12px; }
.doc th, .doc td { border: 1px solid var(--line); padding: 9px 11px; text-align: left; vertical-align: top; }
.doc th { background: var(--bg-2); }
.doc .steps-list li { margin-bottom: 6px; }
.todo { background: #5c3b00; color: #ffd28a; padding: 1px 5px; border-radius: 4px; font-weight: 600; }

@media (max-width: 880px) {
    .hero { grid-template-columns: 1fr; padding-top: 40px; gap: 36px; }
    nav.site .hide-sm { display: none; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }