:root {
    --bg: #05060a;
    --fg: #e8eaf0;
    --muted: #8b90a0;
    --line: rgba(255, 255, 255, 0.09);
    --panel: rgba(14, 16, 24, 0.62);
    --accent: #5ef2ff;
    --accent2: #8b5cff;
    --ok: #5effa8;
    --warn: #ffb85e;
    --f-head: "Space Grotesk", "Noto Sans JP", sans-serif;
    --f-body: "Noto Sans JP", system-ui, sans-serif;
    --f-mono: "JetBrains Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    background: var(--bg);
    color: var(--fg);
    font-family: var(--f-body);
    font-weight: 300;
    line-height: 1.9;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
::selection { background: var(--accent); color: #000; }

#bg {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    display: block;
}
.no-webgl body,
.no-webgl {
    background: radial-gradient(ellipse at 70% 20%, #151a33 0%, var(--bg) 60%);
}
.grain {
    position: fixed;
    inset: -50%;
    z-index: 1;
    pointer-events: none;
    opacity: 0.07;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
    animation: grain 1.2s steps(6) infinite;
}
@keyframes grain {
    0% { transform: translate(0, 0); }
    20% { transform: translate(-3%, 2%); }
    40% { transform: translate(2%, -3%); }
    60% { transform: translate(-2%, -1%); }
    80% { transform: translate(3%, 3%); }
    100% { transform: translate(0, 0); }
}
.glow {
    position: fixed;
    top: 0;
    left: 0;
    width: 520px;
    height: 520px;
    margin: -260px 0 0 -260px;
    z-index: 1;
    pointer-events: none;
    background: radial-gradient(circle, color-mix(in srgb, var(--accent) 16%, transparent) 0%, transparent 62%);
    opacity: 0;
    transition: opacity 0.5s;
    will-change: transform;
}
.glow.on { opacity: 1; }

main, .footer { position: relative; z-index: 2; }
.wrap { width: min(1120px, calc(100% - 48px)); margin: 0 auto; }

/* NAV */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 10;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px clamp(20px, 4vw, 48px);
    transition: background 0.3s, backdrop-filter 0.3s;
}
.nav.scrolled {
    background: rgba(5, 6, 10, 0.6);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
}
.nav__logo { font-family: var(--f-head); font-weight: 700; font-size: 20px; letter-spacing: 0.02em; }
.nav__logo span { color: var(--accent); transition: color 0.8s; }
.nav__links { display: flex; gap: 28px; font-family: var(--f-mono); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; }
.nav__links a { color: var(--muted); transition: color 0.2s; }
.nav__links a:hover { color: var(--fg); }

/* COMMON */
.eyebrow {
    font-family: var(--f-mono);
    font-size: 12px;
    letter-spacing: 0.18em;
    color: var(--accent);
    display: flex;
    align-items: center;
    gap: 10px;
    transition: color 0.8s;
}
.eyebrow .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: currentColor;
    box-shadow: 0 0 12px currentColor;
    animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse { 50% { opacity: 0.3; } }

.section { padding: clamp(100px, 16vw, 200px) 0 clamp(40px, 6vw, 80px); }
.h2 {
    font-family: var(--f-head);
    font-weight: 700;
    font-size: clamp(22px, 3.7vw, 45px);
    line-height: 1.3;
    letter-spacing: -0.01em;
    margin: 18px 0 28px;
}
.nw { white-space: nowrap; }
.lead { color: #c3c7d4; max-width: 760px; font-size: clamp(15px, 1.6vw, 17px); margin: 0 0 40px; }
.meta { font-family: var(--f-mono); font-size: 12px; color: var(--muted); letter-spacing: 0.04em; margin-bottom: 28px; }
.sp { display: none; }

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 26px;
    border: 1px solid var(--line);
    border-radius: 999px;
    font-family: var(--f-mono);
    font-size: 13px;
    letter-spacing: 0.08em;
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(8px);
    transition: transform 0.25s, border-color 0.25s, background 0.25s;
}
.btn:hover { transform: translateY(-3px); border-color: var(--accent); }
.btn--primary { background: var(--accent); color: #031014; border-color: var(--accent); font-weight: 500; transition: transform 0.25s, background 0.8s, border-color 0.8s; }
.btn--primary:hover { transform: translateY(-3px); }

/* REVEAL */
.reveal { opacity: 0; transform: translateY(32px); transition: opacity 0.9s cubic-bezier(.2,.7,.2,1), transform 0.9s cubic-bezier(.2,.7,.2,1); }
.reveal.in { opacity: 1; transform: none; }

/* INTRO */
.intro { min-height: 100vh; min-height: 100svh; display: flex; align-items: center; position: relative; padding: 120px 0 80px; }
.intro__name {
    font-family: var(--f-head);
    font-weight: 500;
    font-size: clamp(34px, 5vw, 64px);
    line-height: 1.2;
    letter-spacing: 0.04em;
    margin: 22px 0 0;
    white-space: nowrap;
}
.intro__name .ch {
    display: inline-block;
    opacity: 0;
    transform: translateY(60%);
    animation: ch 0.9s cubic-bezier(.2,.8,.2,1) forwards;
    animation-delay: calc(0.3s + var(--i) * 0.07s);
}
@keyframes ch { to { opacity: 1; transform: none; } }
.intro__en { font-family: var(--f-mono); letter-spacing: 0.32em; color: var(--muted); font-size: clamp(11px, 1.2vw, 13px); margin: 8px 0 40px 2px; text-transform: uppercase; }
.intro__lead { font-size: clamp(16px, 1.9vw, 22px); line-height: 1.9; color: #c3c7d4; margin-bottom: 40px; }
.typed { color: var(--accent); font-weight: 500; transition: color 0.8s; }
.caret { display: inline-block; width: 2px; height: 1.1em; background: var(--accent); margin-left: 3px; vertical-align: -0.15em; animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.intro__cta { display: flex; gap: 14px; flex-wrap: wrap; }
.scroll-hint {
    position: absolute;
    left: 50%;
    bottom: 28px;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    font-family: var(--f-mono);
    font-size: 10px;
    letter-spacing: 0.3em;
    color: var(--muted);
}
.scroll-hint span { width: 1px; height: 46px; background: linear-gradient(var(--accent), transparent); animation: drop 1.8s ease-in-out infinite; transform-origin: top; }
@keyframes drop { 0% { transform: scaleY(0); } 50% { transform: scaleY(1); } 100% { transform: scaleY(1); opacity: 0; } }

/* CARDS */
.cards3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 48px; }
.card, .point {
    position: relative;
    padding: 32px 28px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: var(--panel);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    overflow: hidden;
    transition: border-color 0.3s, transform 0.4s cubic-bezier(.2,.7,.2,1), opacity 0.9s;
}
.card:hover, .point:hover { border-color: color-mix(in srgb, var(--accent) 60%, transparent); transform: translateY(-6px); }
.card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at var(--mx, 50%) var(--my, 0%), color-mix(in srgb, var(--accent) 14%, transparent), transparent 55%);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
}
.card:hover::before { opacity: 1; }
.card__no { font-family: var(--f-mono); font-size: 12px; color: var(--accent); letter-spacing: 0.2em; display: block; margin-bottom: 20px; transition: color 0.8s; }
.card h3 { font-family: var(--f-head); font-size: 20px; font-weight: 700; margin-bottom: 12px; line-height: 1.5; }
.card p { font-size: 14px; color: #b4b9c8; line-height: 1.9; }

/* PIPELINE */
.pipeline { display: flex; align-items: center; gap: 0; margin: 12px 0 32px; padding: 28px; border: 1px solid var(--line); border-radius: 18px; background: var(--panel); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); }
.node { flex: 0 0 auto; text-align: center; padding: 16px 18px; border: 1px solid var(--line); border-radius: 12px; background: rgba(255, 255, 255, 0.03); min-width: 128px; }
.node b { display: block; font-family: var(--f-head); font-size: 16px; font-weight: 700; }
.node small { display: block; font-family: var(--f-mono); font-size: 10.5px; color: var(--muted); margin-top: 4px; letter-spacing: 0.03em; }
.node--human { border-color: var(--ok); box-shadow: 0 0 28px rgba(94, 255, 168, 0.18); }
.node--human small { color: var(--ok); }
.link { flex: 1 1 24px; height: 2px; min-width: 24px; position: relative; background: repeating-linear-gradient(90deg, rgba(255,255,255,0.28) 0 6px, transparent 6px 12px); overflow: visible; }
.link::after {
    content: "";
    position: absolute;
    top: -3px;
    left: 0;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 14px var(--accent);
    animation: travel 2.4s linear infinite;
}
.link:nth-of-type(2)::after { animation-delay: 0.4s; }
.link:nth-of-type(3)::after { animation-delay: 0.8s; }
.link:nth-of-type(4)::after { animation-delay: 1.2s; }
@keyframes travel { 0% { left: 0; opacity: 0; } 15% { opacity: 1; } 85% { opacity: 1; } 100% { left: calc(100% - 8px); opacity: 0; } }

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 44px; }
.chips span { font-family: var(--f-mono); font-size: 12px; padding: 6px 14px; border: 1px solid var(--line); border-radius: 999px; color: #c3c7d4; background: rgba(255, 255, 255, 0.03); }

.grid2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.point h3 { font-family: var(--f-head); font-size: 18px; font-weight: 700; line-height: 1.6; margin-bottom: 12px; }
.point h3 em { font-style: normal; font-family: var(--f-mono); font-size: 12px; color: var(--accent); display: block; letter-spacing: 0.2em; margin-bottom: 8px; transition: color 0.8s; }
.point p { font-size: 14px; color: #b4b9c8; }

.honest { display: grid; grid-template-columns: 1.2fr 1fr; gap: 20px; margin-top: 20px; }
.honest__col { padding: 32px 28px; border-radius: 18px; border: 1px solid var(--line); background: var(--panel); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); }
.honest__col h4 { font-family: var(--f-mono); font-size: 12px; letter-spacing: 0.2em; margin-bottom: 20px; }
.honest__col--yes { border-color: rgba(94, 255, 168, 0.35); }
.honest__col--yes h4 { color: var(--ok); }
.honest__col--no { border-color: rgba(255, 184, 94, 0.3); }
.honest__col--no h4 { color: var(--warn); }
.honest__col p { font-size: 14px; color: #b4b9c8; }
.honest__col .note { margin-top: 12px; font-family: var(--f-mono); font-size: 12px; color: var(--muted); }
.stats { display: flex; gap: 40px; margin-bottom: 20px; flex-wrap: wrap; }
.stats .num { display: block; font-family: var(--f-head); font-size: clamp(38px, 5vw, 60px); font-weight: 700; line-height: 1.1; color: var(--ok); }
.stats small { font-family: var(--f-mono); font-size: 11px; color: var(--muted); }

/* WORKS */
.works { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; margin-top: 12px; }
.work { display: block; border: 1px solid var(--line); border-radius: 18px; overflow: hidden; background: var(--panel); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); transition: border-color 0.3s, transform 0.4s cubic-bezier(.2,.7,.2,1), opacity 0.9s; }
.work:hover { border-color: var(--accent); transform: translateY(-8px); }
.work__view { position: relative; aspect-ratio: 16 / 10; overflow: hidden; background: #0a0c14; }
.work__view iframe { position: absolute; top: 0; left: 0; width: 1280px; height: 800px; border: 0; transform-origin: 0 0; pointer-events: none; opacity: 0; transition: opacity 0.8s; background: #fff; }
.work__view iframe.ready { opacity: 1; }
@media (min-width: 901px) { .works { grid-template-columns: repeat(3, 1fr); } }
.work__shade { position: absolute; inset: 0; background: linear-gradient(180deg, transparent 60%, rgba(5, 6, 10, 0.7)); pointer-events: none; transition: opacity 0.3s; }
.work:hover .work__shade { opacity: 0; }
.work__body { padding: 18px 22px 20px; position: relative; }
.work__no { font-family: var(--f-mono); font-size: 12px; color: var(--accent); letter-spacing: 0.2em; transition: color 0.8s; }
.work h3 { font-family: var(--f-head); font-size: 22px; font-weight: 700; margin: 6px 0 2px; }
.work__cat { font-family: var(--f-mono); font-size: 11.5px; color: var(--muted); margin-bottom: 6px; letter-spacing: 0.04em; }
.work p { font-size: 13.5px; color: #b4b9c8; line-height: 1.6; }

/* STACK */
.section--stack { padding-bottom: 120px; overflow-x: clip; }
.marquee { overflow: hidden; margin: 20px 0 60px; transform: rotate(-2deg); }
.marquee__row { display: flex; width: max-content; gap: 48px; padding: 14px 0; animation: marq 40s linear infinite; }
.marquee__row--rev { animation-direction: reverse; animation-duration: 50s; }
.marquee__row span { font-family: var(--f-head); font-weight: 700; font-size: clamp(32px, 6vw, 72px); letter-spacing: -0.02em; white-space: nowrap; color: transparent; -webkit-text-stroke: 1px rgba(255, 255, 255, 0.3); transition: color 0.3s; }
.marquee__row span:nth-child(3n) { color: var(--fg); -webkit-text-stroke: 0; }
@keyframes marq { to { transform: translateX(-50%); } }

/* FOOTER */
.footer { padding: 120px 0 60px; border-top: 1px solid var(--line); background: linear-gradient(180deg, transparent, rgba(5, 6, 10, 0.85)); }
.footer__big { font-family: var(--f-head); font-weight: 700; font-size: clamp(40px, 9vw, 120px); line-height: 1.05; letter-spacing: -0.03em; background: linear-gradient(120deg, var(--accent), var(--accent2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.footer__small { margin-top: 48px; font-family: var(--f-mono); font-size: 12px; color: var(--muted); letter-spacing: 0.08em; }

/* RESPONSIVE */
@media (max-width: 900px) {
    .cards3, .grid2, .honest, .works { grid-template-columns: 1fr; }
    .pipeline { flex-direction: column; align-items: stretch; padding: 22px; }
    .node { min-width: 0; }
    .link { flex: 0 0 28px; width: 2px; min-width: 0; height: 28px; align-self: center; background: repeating-linear-gradient(180deg, rgba(255,255,255,0.28) 0 6px, transparent 6px 12px); }
    .link::after { top: 0; left: -3px; animation-name: travel-v; }
    @keyframes travel-v { 0% { top: 0; opacity: 0; } 15% { opacity: 1; } 85% { opacity: 1; } 100% { top: calc(100% - 8px); opacity: 0; } }
    .nav__links { gap: 16px; }
    .pc { display: none; }
    .sp { display: inline; }
}
@media (max-width: 520px) {
    .nav__links { display: none; }
    .intro__name { white-space: normal; }
    .stats { gap: 28px; }
}
@media (hover: none) { .glow { display: none; } }
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .grain, .marquee__row, .link::after, .scroll-hint span, .caret, .eyebrow .dot { animation: none; }
    .reveal { opacity: 1; transform: none; transition: none; }
    .intro__name .ch { animation: none; opacity: 1; transform: none; }
}

/* ---------- 埋め込み (Projects) ---------- */
.embed { margin-top: 12px; border: 1px solid var(--line); border-radius: 18px; overflow: hidden; background: var(--panel); }
.embed__bar { display: flex; justify-content: space-between; align-items: center; padding: 10px 16px; font-family: var(--f-mono, monospace); font-size: 12px; color: #b4b9c8; border-bottom: 1px solid var(--line); }
.embed__bar a { color: inherit; opacity: 0.8; }
.embed__bar a:hover { opacity: 1; }
.embed__actions { display: flex; align-items: center; gap: 14px; }
.embed__actions a { display: inline-flex; align-items: center; gap: 6px; }
.embed__actions svg { display: block; width: 16px; height: 16px; fill: currentColor; }
.embed__view { position: relative; height: min(70vh, 620px); min-height: 460px; background: #0a0c14; }
.embed__view iframe { width: 100%; height: 100%; border: 0; opacity: 0; transition: opacity 0.8s; }
.embed__view iframe.ready { opacity: 1; }
.embed__shots { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; background: #0a0c14; }
.embed__shots a { display: block; }
.embed__bar .yt { display: inline-flex; align-items: center; gap: 6px; }
.embed__bar .yt svg { display: block; width: 16px; height: 16px; fill: currentColor; }
.embed__shots img { display: block; width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.embed-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-top: 12px; }
.embed-grid .embed { margin-top: 0; }
@media (max-width: 700px) { .embed-grid { grid-template-columns: 1fr; } }