/* ============================================================
   Y+ Studio — Landing page (contemporary-minimalist identity)
   Implemented from the Claude Design handoff: Landing.dc.html
   ============================================================ */
:root, [data-theme="light"] {
  --bg: #FAFAF8; --surface: #FFFFFF; --surface-2: #F4F4F0;
  --ink: #15171C; --muted: #5B616E; --line: #E7E7E2; --line-strong: #D8D8D1;
  --accent: #3D5AFE; --accent-soft: #EEF1FF; --accent-ink: #2A3BC7;
  --danger: #D6453B; --ok: #1F8A5B;
  --r-sm: 8px; --r-md: 12px; --r-full: 999px;
  --shadow-pop: 0 10px 30px rgba(20,22,30,.10);
}
[data-theme="dark"] {
  --bg: #0E1014; --surface: #16191F; --surface-2: #1C2028;
  --ink: #ECEEF2; --muted: #949BA8; --line: #262A31; --line-strong: #333945;
  --accent: #6B7CFF; --accent-soft: #1A2032; --accent-ink: #AAB4FF;
  --danger: #E5594D; --ok: #3DBE82;
  --shadow-pop: 0 10px 30px rgba(0,0,0,.45);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body { font-family: 'Plus Jakarta Sans', system-ui, -apple-system, Segoe UI, Roboto, sans-serif; -webkit-font-smoothing: antialiased; }
::selection { background: var(--accent); color: #fff; }
.mono { font-family: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace; }

.page { background: var(--bg); color: var(--ink); min-height: 100vh; transition: background .2s, color .2s; }
.wrap { max-width: 1140px; margin: 0 auto; }

/* Header */
.nav { position: sticky; top: 0; z-index: 30; display: flex; align-items: center; gap: 18px; padding: 16px 32px;
  background: color-mix(in srgb, var(--bg) 82%, transparent); backdrop-filter: blur(12px); border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.brand .wordmark { font-weight: 700; font-size: 15px; letter-spacing: -0.01em; }
.nav .links { display: flex; gap: 24px; margin-left: 14px; }
.nav .links a { text-decoration: none; color: var(--muted); font-weight: 500; font-size: 14px; }
.nav .links a:hover { color: var(--ink); }
.nav .grow { flex: 1; }
@media (max-width: 720px) { .nav .links { display: none; } }

.theme-btn { display: inline-flex; align-items: center; gap: 7px; height: 36px; padding: 0 12px; border: 1px solid var(--line);
  border-radius: var(--r-sm); background: var(--surface); color: var(--muted); font: inherit; font-size: 12px;
  font-family: 'IBM Plex Mono', monospace; letter-spacing: .03em; cursor: pointer; }
.theme-btn .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }

.btn-accent { display: inline-flex; align-items: center; gap: 7px; height: 36px; padding: 0 16px; border-radius: var(--r-md);
  background: var(--accent); color: #fff; text-decoration: none; font-weight: 600; font-size: 14px; border: 0; cursor: pointer; }
.btn-accent.lg { height: 46px; padding: 0 22px; font-size: 15px; }
.btn-ghost { display: inline-flex; align-items: center; gap: 7px; height: 46px; padding: 0 22px; border-radius: var(--r-md);
  background: var(--surface); border: 1px solid var(--line); color: var(--ink); text-decoration: none; font-weight: 600; font-size: 15px; }

/* Hero */
.hero { padding: 72px 32px 40px; display: grid; grid-template-columns: 1.02fr 1fr; gap: 48px; align-items: center; }
@media (max-width: 880px) { .hero { grid-template-columns: 1fr; padding-top: 48px; } }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; font-family: 'IBM Plex Mono', monospace; font-size: 12px;
  font-weight: 500; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); border: 1px solid var(--line);
  padding: 6px 12px; border-radius: var(--r-full); }
.eyebrow .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
.hero h1 { font-size: 48px; line-height: 1.05; letter-spacing: -0.03em; margin: 20px 0 18px; font-weight: 700; }
.hero h1 .accent { color: var(--accent); }
.hero .lead { font-size: 17px; line-height: 1.5; color: var(--muted); margin: 0 0 28px; max-width: 520px; }
.hero .cta { display: flex; gap: 12px; flex-wrap: wrap; }
.hero .note { margin-top: 18px; font-family: 'IBM Plex Mono', monospace; font-size: 12px; color: var(--muted); letter-spacing: .02em; }
@media (max-width: 560px) { .hero h1 { font-size: 36px; } }

/* Browser mock */
.mock { border: 1px solid var(--line); border-radius: var(--r-md); overflow: hidden; background: var(--surface); box-shadow: var(--shadow-pop); }
.mock .titlebar { display: flex; align-items: center; gap: 8px; padding: 10px 14px; border-bottom: 1px solid var(--line); background: var(--surface-2); }
.mock .titlebar .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--line-strong); }
.mock .titlebar .url { flex: 1; text-align: center; font-family: 'IBM Plex Mono', monospace; font-size: 11px; color: var(--muted); }
/* title-bar Moodboard ⇄ 3D mode pill (echoes the editor float-switch) */
.mock .modepill { display: inline-flex; align-items: center; gap: 7px; padding: 3px 4px 3px 9px; border: 1px solid var(--line); border-radius: 999px; background: var(--surface); font-size: 10px; color: var(--muted); }
.mock .modepill b { color: #fff; background: var(--accent); border-radius: 999px; padding: 2px 8px; font-weight: 600; }
.mock .modepill i { width: 1px; height: 11px; background: var(--line); display: inline-block; }
.mock .modepill span { padding-right: 6px; }
.mock .body { display: grid; grid-template-columns: 1fr 1.12fr; height: 312px; }

/* Moodboard surface */
.mock .mb { border-right: 1px solid var(--line); padding: 14px; display: flex; flex-direction: column; gap: 11px; background: linear-gradient(180deg, var(--surface), color-mix(in srgb, var(--surface-2) 45%, var(--surface))); }
.mock .seclabel { display: flex; align-items: center; gap: 7px; font-family: 'IBM Plex Mono', monospace; font-size: 11px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); }
.mock .tiles { display: grid; grid-template-columns: 1fr 1fr; grid-auto-rows: 1fr; gap: 9px; flex: 1; }
.mock .card { border-radius: var(--r-sm); border: 1px solid var(--line); box-shadow: 0 1px 2px rgba(20,22,30,.05); overflow: hidden; position: relative; }
.mock .card.photo.p1 { background: linear-gradient(150deg, #c9d6ef 0%, #aab8d8 45%, #8593b6 100%); }
.mock .card.photo.p2 { background: linear-gradient(150deg, #d9cbb6 0%, #c2a98a 55%, #9c8466 100%); }
.mock .card.photo::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 34%; background: linear-gradient(180deg, transparent, rgba(20,22,30,.18)); }
.mock .card.note { background: #FFF6C4; border-color: #ECDC8E; display: flex; flex-direction: column; justify-content: center; gap: 6px; padding: 0 11px; transform: rotate(-1.4deg); }
.mock .card.note span { height: 5px; border-radius: 3px; background: #C9B25A; }
.mock .card.note span:first-child { width: 78%; } .mock .card.note span:last-child { width: 54%; }
.mock .card.text { background: var(--surface); display: flex; flex-direction: column; justify-content: center; gap: 7px; padding: 0 12px; }
.mock .card.text i { height: 6px; border-radius: 3px; background: var(--line); display: block; }
.mock .swatches { display: flex; gap: 7px; }
.mock .swatches b { width: 15px; height: 15px; border-radius: 50%; border: 1px solid color-mix(in srgb, var(--ink) 12%, transparent); }

/* 3D massing surface */
.mock .ms { position: relative; background: radial-gradient(120% 90% at 70% 18%, color-mix(in srgb, var(--accent-soft) 60%, var(--surface-2)), var(--surface-2)); overflow: hidden; }
.mock .ms svg.grid { position: absolute; inset: 0; width: 100%; height: 100%; }
.mock .ms .corner { position: absolute; left: 12px; top: 12px; display: flex; align-items: center; gap: 7px; font-family: 'IBM Plex Mono', monospace; font-size: 11px; text-transform: uppercase; letter-spacing: .05em; color: var(--ink); }
.mock .ms .metrics { position: absolute; right: 10px; bottom: 10px; display: flex; flex-direction: column; align-items: flex-end; gap: 6px; }
.mock .ms .chip { display: inline-flex; align-items: center; gap: 4px; font-size: 10px; color: var(--muted); background: color-mix(in srgb, var(--surface) 88%, transparent); border: 1px solid var(--line); border-radius: var(--r-sm); padding: 4px 8px; }
.mock .ms .chip b { color: var(--ink); font-weight: 600; } .mock .ms .chip i { font-style: normal; opacity: .7; }
.mock .ms .chip.ok { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 35%, var(--line)); background: color-mix(in srgb, var(--ok) 12%, var(--surface)); }
@media (max-width: 880px) { .mock .body { height: 280px; } }

/* Sections */
.section { padding: 56px 32px; }
.kicker { font-family: 'IBM Plex Mono', monospace; font-size: 12px; text-transform: uppercase; letter-spacing: .06em; color: var(--accent); margin-bottom: 10px; }
.section h2 { font-size: 30px; letter-spacing: -0.02em; margin: 0 0 6px; font-weight: 700; }
.section .sub { color: var(--muted); font-size: 16px; margin: 0 0 32px; }

.duo { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 760px) { .duo { grid-template-columns: 1fr; } }
.tool { border: 1px solid var(--line); border-radius: var(--r-md); padding: 28px; background: var(--surface); }
.tool .ic { width: 40px; height: 40px; border-radius: var(--r-sm); border: 1px solid var(--line); display: grid; place-items: center; color: var(--accent); margin-bottom: 16px; }
.tool h3 { font-size: 19px; margin: 0 0 8px; letter-spacing: -0.01em; }
.tool p { color: var(--muted); margin: 0 0 14px; font-size: 14px; line-height: 1.5; }
.tool ul { margin: 0; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 8px; }
.tool li { display: flex; gap: 10px; align-items: flex-start; color: var(--muted); font-size: 14px; line-height: 1.45; }
.tool li .b { flex: 0 0 auto; margin-top: 6px; width: 5px; height: 5px; border-radius: 50%; background: var(--accent); }

/* Feature grid — hairline dividers via 1px gap on a line-colored bg */
.feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--r-md); overflow: hidden; }
@media (max-width: 820px) { .feat-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 540px) { .feat-grid { grid-template-columns: 1fr; } }
.feat { background: var(--surface); padding: 24px; }
.feat .ic { color: var(--accent); margin-bottom: 14px; }
.feat h4 { margin: 0 0 6px; font-size: 16px; letter-spacing: -0.01em; }
.feat p { color: var(--muted); font-size: 13.5px; margin: 0; line-height: 1.5; }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 760px) { .steps { grid-template-columns: 1fr; } }
.step { border: 1px solid var(--line); border-radius: var(--r-md); padding: 24px; background: var(--surface); }
.step .n { font-family: 'IBM Plex Mono', monospace; font-size: 13px; font-weight: 600; color: var(--accent); width: 34px; height: 34px; border: 1px solid var(--line); border-radius: var(--r-sm); display: grid; place-items: center; margin-bottom: 14px; }
.step h4 { margin: 0 0 6px; font-size: 16px; }
.step p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.5; }

/* CTA band */
.cta-band { padding: 0 32px; margin-top: 24px; }
.cta-inner { border: 1px solid var(--line); border-radius: var(--r-md); background: var(--ink); color: var(--bg); padding: 52px 40px; text-align: center; }
.cta-inner h2 { margin: 0 0 10px; font-size: 30px; letter-spacing: -0.02em; }
.cta-inner p { margin: 0 0 24px; opacity: .7; font-size: 16px; }

/* Footer */
.foot { margin-top: 48px; padding: 32px; display: flex; align-items: center; gap: 16px; border-top: 1px solid var(--line); flex-wrap: wrap; font-family: 'IBM Plex Mono', monospace; font-size: 12px; color: var(--muted); }
.foot .grow { flex: 1; }
.foot a { color: var(--muted); text-decoration: none; }
.foot a:hover { color: var(--ink); }