/* ─────────────────────────────────────────────────────────
   Interdict — ink-wash 山水 · editorial serif · seal-red accent
   ───────────────────────────────────────────────────────── */

:root {
  color-scheme: dark;

  /* night ink (default) */
  --ink-0: #07070d;
  --ink-1: #0b0a12;
  --ink-2: #11101b;
  --surface: rgba(14, 13, 23, 0.74);
  --line: rgba(178, 166, 210, 0.11);
  --line-2: rgba(178, 166, 210, 0.22);

  --paper: #e8e0d4;          /* warm rice-paper text */
  --paper-dim: #aaa0b7;
  --muted: #6f687f;

  --lav: #a792d3;            /* muted lavender */
  --lav-bright: #c0aceb;
  --lav-deep: #7962b0;
  --lav-faint: rgba(167, 146, 211, 0.075);
  --lav-glow: rgba(167, 146, 211, 0.22);

  --seal: #c84b33;           /* vermilion chop */
  --seal-soft: rgba(200, 75, 51, 0.14);

  --warn: #e3bd7c;
  --ok: #9ed8bf;

  /* scene tones (dark) */
  --sky-a: #0a0912; --sky-b: #141120; --sky-c: #07070d;
  --moon-a: #efe7df; --moon-b: rgba(239,231,223,0);
  --halo-a: rgba(194,178,226,0.22); --halo-b: rgba(194,178,226,0);
  --r1a:#29243d; --r1b:#171426; --r2a:#211d34; --r2b:#12101e; --r3a:#161327; --r3b:#070612;
  --mist: rgba(225,217,236,0.07);
  --branch: rgba(228,219,238,0.55);
  --bloom: rgba(190,168,228,0.85);

  --disp: "Fraunces", Georgia, serif;
  --body: "Spectral", Georgia, serif;
  --mono: "Spline Sans Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --r: 4px;
  --shadow: 0 36px 90px -40px rgba(0,0,0,0.72);
  --maxw: 1140px;
  --pad: clamp(80px, 11vw, 150px);
}

[data-theme="light"] {
  color-scheme: light;

  --ink-0: #ece3d2;          /* aged paper */
  --ink-1: #f2ebdd;
  --ink-2: #fbf6ec;
  --surface: rgba(251, 246, 236, 0.74);
  --line: rgba(70, 54, 96, 0.14);
  --line-2: rgba(70, 54, 96, 0.26);

  --paper: #221b2c;          /* ink text */
  --paper-dim: #54485f;
  --muted: #837794;

  --lav: #6a55a0;
  --lav-bright: #5a468f;
  --lav-deep: #493676;
  --lav-faint: rgba(106, 85, 160, 0.08);
  --lav-glow: rgba(106, 85, 160, 0.20);

  --seal: #bf3f29;
  --seal-soft: rgba(191, 63, 41, 0.12);

  --warn: #a9791f;
  --ok: #2f8a6c;

  --sky-a:#dcd1e0; --sky-b:#e7dcdf; --sky-c:#cfc6d8;
  --moon-a:#fffaf2; --moon-b:rgba(255,250,242,0);
  --halo-a:rgba(255,250,242,0.7); --halo-b:rgba(255,250,242,0);
  --r1a:#b9aecb; --r1b:#cabfd6; --r2a:#9f93b8; --r2b:#b3a8c8; --r3a:#7e7199; --r3b:#94889f;
  --mist: rgba(255,252,246,0.5);
  --branch: rgba(60,46,82,0.6);
  --bloom: rgba(120,92,170,0.8);

  --shadow: 0 36px 80px -44px rgba(70,50,110,0.4);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html.is-lagging { scroll-behavior: auto; }

body {
  margin: 0;
  min-width: 320px;
  font-family: var(--body);
  font-weight: 400;
  line-height: 1.62;
  color: var(--paper);
  background:
    radial-gradient(1000px 560px at 82% -6%, var(--lav-faint), transparent 60%),
    linear-gradient(180deg, var(--ink-0), var(--ink-1) 50%, var(--ink-0));
  transition: background 500ms ease, color 500ms ease;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
pre, code { font-family: var(--mono); }
pre { margin: 0; overflow-x: auto; }
p, h1, h2, h3 { margin-top: 0; }
p { color: var(--paper-dim); }
em { font-style: italic; color: var(--lav); }
.lav { color: var(--lav); }

.eyebrow {
  margin: 0 0 18px;
  color: var(--seal);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.26em;
  text-transform: uppercase;
}

/* ─── Intro gate ───────────────────────────────────────── */

.gate {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: grid;
  place-items: center;
  padding: 30px;
  text-align: center;
  overflow: hidden;
  background: var(--ink-0);
  transition: opacity 1000ms ease, visibility 1000ms ease, filter 1000ms ease, transform 1000ms ease;
}
.gate.is-open {
  opacity: 0; visibility: hidden; pointer-events: none;
  filter: blur(10px); transform: scale(1.04);
}

.scene { position: absolute; inset: 0; width: 100%; height: 100%; }
.sky-top { stop-color: var(--sky-a); } .sky-mid { stop-color: var(--sky-b); } .sky-bot { stop-color: var(--sky-c); }
.moon-core { stop-color: var(--moon-a); } .moon-edge { stop-color: var(--moon-b); }
.halo-in { stop-color: var(--halo-a); } .halo-out { stop-color: var(--halo-b); }
.ridge1-a{stop-color:var(--r1a);} .ridge1-b{stop-color:var(--r1b);}
.ridge2-a{stop-color:var(--r2a);} .ridge2-b{stop-color:var(--r2b);}
.ridge3-a{stop-color:var(--r3a);} .ridge3-b{stop-color:var(--r3b);}
.ridge { opacity: 0.96; }
.mist-band { fill: var(--mist); }
.m1 { animation: drift 38s linear infinite; }
.m2 { animation: drift 52s linear infinite reverse; }
.m3 { animation: drift 46s linear infinite; }
@keyframes drift { from { transform: translateX(-12%); } to { transform: translateX(12%); } }
.branch .limb { stroke: var(--branch); stroke-width: 6; }
.branch .twig { stroke: var(--branch); stroke-width: 3; }
.blossoms circle { fill: var(--bloom); }

/* moon breathing glow */
.scene circle:nth-of-type(1) { animation: glow 9s ease-in-out infinite; transform-origin: 930px 190px; }
@keyframes glow { 0%,100% { opacity: 0.85; transform: scale(1); } 50% { opacity: 1; transform: scale(1.06); } }

/* falling petals */
.petals { position: absolute; inset: 0; pointer-events: none; z-index: 1; }
.petals span {
  position: absolute;
  top: -6vh;
  left: var(--x);
  width: calc(13px * var(--s));
  height: calc(8px * var(--s));
  background: linear-gradient(120deg, var(--lav-bright), var(--lav-deep));
  border-radius: 80% 16% 80% 16%;
  opacity: 0;
  animation: fall var(--dur) linear var(--d) infinite;
}
@keyframes fall {
  0%   { opacity: 0; transform: translateY(0) translateX(0) rotate(0deg); }
  10%  { opacity: 0.8; }
  90%  { opacity: 0.8; }
  100% { opacity: 0; transform: translateY(108vh) translateX(-9vw) rotate(420deg); }
}

.gate-inner {
  position: relative;
  z-index: 2;
  width: min(760px, 100%);
}
.gate-eyebrow {
  margin: 0 0 24px;
  color: var(--seal);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  opacity: 0;
  animation: rise 900ms cubic-bezier(.16,1,.3,1) .15s forwards;
}
.gate-title {
  margin: 0;
  font-family: var(--disp);
  font-optical-sizing: auto;
  font-weight: 500;
  font-size: clamp(82px, 18vw, 232px);
  line-height: 0.84;
  letter-spacing: -0.025em;
  color: var(--paper);
  text-shadow: 0 30px 90px rgba(0,0,0,0.5);
  opacity: 0;
  animation: rise 1100ms cubic-bezier(.16,1,.3,1) .3s forwards;
}
[data-theme="light"] .gate-title { text-shadow: 0 24px 70px rgba(120,100,160,0.3); }
.gate-line {
  margin: 30px auto 46px;
  max-width: 520px;
  font-family: var(--body);
  font-style: italic;
  font-size: clamp(19px, 2.5vw, 27px);
  line-height: 1.35;
  color: var(--paper-dim);
  opacity: 0;
  animation: rise 1100ms cubic-bezier(.16,1,.3,1) .55s forwards;
}
.enter-button {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 14px;
  padding: 15px 20px 15px 16px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  background: var(--surface);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--paper);
  font-family: var(--body);
  font-size: 17px;
  letter-spacing: 0.02em;
  opacity: 0;
  animation: rise 1100ms cubic-bezier(.16,1,.3,1) .8s forwards;
  transition: transform .35s cubic-bezier(.16,1,.3,1), border-color .35s, box-shadow .35s;
}
.enter-button:hover, .enter-button:focus-visible {
  transform: translateY(-3px);
  border-color: var(--seal);
  box-shadow: 0 22px 50px -22px var(--seal);
  outline: none;
}
.enter-seal {
  display: grid; place-items: center;
  width: 38px; height: 38px;
  border-radius: 50%;
  background: var(--seal);
  color: #fff;
  font-family: var(--body);
  font-size: 18px;
  box-shadow: 0 0 0 3px var(--seal-soft);
}
.enter-label { padding-right: 10px; }
.gate-foot {
  position: absolute; bottom: 28px; left: 0; right: 0; z-index: 2;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0;
  animation: rise 1200ms cubic-bezier(.16,1,.3,1) 1s forwards;
}
@keyframes rise {
  from { opacity: 0; transform: translateY(calc(28px + var(--lag-y, 0px))); }
  to { opacity: 1; transform: translateY(var(--lag-y, 0px)); }
}

/* ─── Site reveal + staggered load ─────────────────────── */

.site { opacity: 0; visibility: hidden; transition: opacity 600ms ease; }
.site.is-visible { opacity: 1; visibility: visible; }

.reveal { opacity: 0; }
.site.is-visible .reveal {
  animation: rise 800ms cubic-bezier(.16,1,.3,1) forwards;
  animation-delay: calc(var(--i, 0) * 110ms + 200ms);
}

/* ─── Header ───────────────────────────────────────────── */

.site-header {
  position: sticky; top: 0; z-index: 30;
  display: flex; align-items: center; justify-content: space-between;
  min-height: 70px;
  padding: 0 clamp(18px, 4vw, 44px);
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--ink-0) 80%, transparent);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}
.brand { font-family: var(--disp); font-weight: 600; font-size: 27px; letter-spacing: -0.01em; }
.nav { display: flex; gap: 4px; font-size: 16px; color: var(--paper-dim); }
.nav a { padding: 7px 14px; border-radius: var(--r); transition: background .16s, color .16s; }
.nav a:hover { background: var(--lav-faint); color: var(--paper); }
.header-actions { display: flex; align-items: center; gap: 14px; }
.header-link {
  display: inline-grid; place-items: center;
  min-height: 38px; padding: 0 16px;
  border: 1px solid var(--line-2); border-radius: 999px;
  font-family: var(--mono); font-size: 12.5px;
  transition: border-color .16s, background .16s;
}
.header-link:hover { border-color: var(--seal); background: var(--seal-soft); }

/* theme toggle */
.theme-toggle { padding: 0; border: 0; background: transparent; }
.theme-track {
  position: relative; display: inline-flex; align-items: center;
  width: 180px; height: 40px; padding: 4px;
  border: 1px solid var(--line-2); border-radius: 999px;
  background: var(--surface);
  font-family: var(--mono); font-size: 12px;
  overflow: hidden;
}
.theme-opt { flex: 1; z-index: 2; text-align: center; transition: color .26s; user-select: none; }
.theme-opt-dark { color: var(--paper); } .theme-opt-light { color: var(--muted); }
[data-theme="light"] .theme-opt-dark { color: var(--muted); }
[data-theme="light"] .theme-opt-light { color: var(--paper); }
.theme-knob {
  position: absolute; z-index: 1; top: 4px; left: 4px;
  width: calc(50% - 4px); height: calc(100% - 8px);
  border-radius: 999px;
  background: linear-gradient(135deg, var(--seal), #a83d28);
  box-shadow: 0 6px 16px -6px var(--seal);
  transition: transform .34s cubic-bezier(.16,1,.3,1);
}
[data-theme="light"] .theme-knob {
  transform: translateX(100%);
  background: linear-gradient(135deg, var(--lav), var(--lav-deep));
  box-shadow: 0 6px 16px -6px var(--lav-glow);
}

/* ─── Layout rhythm ────────────────────────────────────── */

.section { width: min(var(--maxw), calc(100% - 48px)); margin: 0 auto; padding: var(--pad) 0; }
.section + .section { padding-top: 0; }

.section-head { max-width: 720px; margin-bottom: 56px; }
.section-head h2 { margin: 0 0 16px; }
.section-sub { margin: 0; font-size: 18px; color: var(--paper-dim); font-style: italic; }

h2 {
  font-family: var(--disp);
  font-optical-sizing: auto;
  font-weight: 500;
  font-size: clamp(36px, 5vw, 64px);
  line-height: 1.02;
  letter-spacing: -0.018em;
}
h3 { margin-bottom: 10px; font-family: var(--disp); font-weight: 600; font-size: 21px; letter-spacing: -0.01em; color: var(--paper); }

/* ─── Buttons ──────────────────────────────────────────── */

.button {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 0 26px;
  border-radius: 999px;
  font-family: var(--mono); font-size: 14px; letter-spacing: 0.02em;
  transition: transform .2s, border-color .2s, background .2s, box-shadow .2s, color .2s;
}
.button.primary {
  border: 1px solid transparent;
  color: #fff;
  background: linear-gradient(135deg, var(--seal), #a83d28);
  box-shadow: 0 16px 40px -18px var(--seal);
}
.button.primary:hover { transform: translateY(-2px); box-shadow: 0 24px 50px -18px var(--seal); }
.button.ghost { border: 1px solid var(--line-2); background: transparent; color: var(--paper); }
.button.ghost:hover { transform: translateY(-2px); border-color: var(--lav-deep); background: var(--lav-faint); }

/* ─── Hero ─────────────────────────────────────────────── */

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(360px, 0.86fr);
  gap: clamp(36px, 5vw, 64px);
  align-items: center;
  min-height: calc(100svh - 70px);
  padding-top: clamp(48px, 7vw, 90px);
}
.hero-wash { display: none; }
.hero-copy { position: relative; z-index: 1; grid-row: 1 / span 2; }
.hero-title { margin-bottom: 26px; font-size: clamp(42px, 6.2vw, 84px); font-weight: 500; line-height: 1.0; }
.lede { max-width: 580px; font-size: 19px; line-height: 1.7; }
.action-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }

.hero-facts { list-style: none; margin: 36px 0 0; padding: 0; display: grid; gap: 10px; max-width: 480px; }
.hero-facts li {
  position: relative; padding-left: 22px;
  font-size: 15.5px; color: var(--paper-dim);
}
.hero-facts li::before {
  content: "印"; position: absolute; left: 0; top: 1px;
  color: var(--seal); font-size: 13px;
}
.hero-facts b { color: var(--paper); font-weight: 500; font-family: var(--mono); font-size: 14px; }

/* ─── Agent layer visual ───────────────────────────────── */

.agent-layer-visual {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 14px;
  padding: 24px;
  min-height: 430px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background:
    radial-gradient(420px 260px at 50% 38%, rgba(167,146,211,0.16), transparent 68%),
    linear-gradient(180deg, rgba(19,17,30,0.88), rgba(8,7,13,0.82));
  box-shadow: 0 0 0 1px var(--line), 0 44px 120px -52px rgba(0,0,0,0.92);
  overflow: hidden;
}
.agent-layer-visual::before {
  content: "";
  position: absolute;
  inset: 16px;
  border: 1px solid rgba(178,166,210,0.08);
  background-image:
    linear-gradient(rgba(178,166,210,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(178,166,210,0.05) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: radial-gradient(circle at center, #000 0 48%, transparent 78%);
}
.layer-node,
.layer-core,
.layer-proof {
  position: relative;
  z-index: 1;
}
.layer-node {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 70px;
  padding: 16px 18px;
  border: 1px solid var(--line-2);
  border-radius: var(--r);
  background: rgba(7,7,13,0.72);
}
.layer-node span,
.layer-proof b {
  color: var(--seal);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.layer-node strong {
  color: var(--paper);
  font-family: var(--disp);
  font-size: 24px;
  font-weight: 500;
}
.layer-core {
  display: grid;
  place-items: center;
  min-height: 146px;
  isolation: isolate;
}
.layer-core strong {
  color: var(--paper);
  font-family: var(--disp);
  font-size: clamp(38px, 5vw, 56px);
  font-weight: 500;
  line-height: 1;
}
.layer-core em {
  margin-top: 10px;
  color: var(--paper-dim);
  font-family: var(--mono);
  font-size: 11px;
  font-style: normal;
  letter-spacing: 0.11em;
}
.core-ring {
  position: absolute;
  width: 150px;
  aspect-ratio: 1;
  border: 1px solid rgba(167,146,211,0.18);
  border-radius: 50%;
  animation: pulse-ring 4.8s ease-in-out infinite;
  z-index: -1;
}
.core-ring:nth-child(2) { width: 210px; animation-delay: 0.8s; }
.core-ring:nth-child(3) { width: 280px; animation-delay: 1.6s; }
@keyframes pulse-ring {
  0%, 100% { opacity: 0.28; transform: scale(0.96); }
  50% { opacity: 0.72; transform: scale(1.04); }
}
.layer-flow {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  height: 24px;
  align-items: center;
}
.layer-flow span {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--lav), transparent);
  animation: data-flow 1.8s ease-in-out infinite;
}
.layer-flow span:nth-child(2) { animation-delay: 0.18s; }
.layer-flow span:nth-child(3) { animation-delay: 0.36s; }
.layer-flow.reverse span { animation-direction: reverse; }
@keyframes data-flow {
  0%,100% { opacity: 0.18; transform: translateX(-10px); }
  50% { opacity: 0.9; transform: translateX(10px); }
}
.layer-proof {
  display: flex;
  gap: 14px;
  align-items: center;
  padding: 14px 16px;
  border-left: 2px solid var(--seal);
  background: rgba(200,75,51,0.08);
}
.layer-proof span {
  color: var(--paper-dim);
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.5;
}
.scroll-lag {
  transform: translateY(var(--lag-y, 0px));
  will-change: transform;
}

/* ─── Console ──────────────────────────────────────────── */

.console {
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--surface);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.hero-console {
  align-self: start;
  box-shadow: 0 0 0 1px var(--line), 0 44px 110px -44px rgba(0,0,0,0.7), 0 0 80px -34px var(--lav-glow);
}
.console-bar {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--ink-0) 46%, transparent);
}
.console-dots { display: inline-flex; gap: 7px; }
.console-dots i { width: 10px; height: 10px; border-radius: 50%; opacity: 0.85; }
.console-dots i:nth-child(1){ background:#d2553c; } .console-dots i:nth-child(2){ background:#dcae5e; } .console-dots i:nth-child(3){ background:#7fb98f; }
.console-title { color: var(--muted); font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.03em; }
.console pre { padding: 22px; font-size: 12.6px; line-height: 1.9; color: var(--paper); }
.prompt { color: var(--seal); } .bad { color: var(--seal); } .warn { color: var(--warn); } .good { color: var(--ok); } .dim { color: var(--muted); }

/* ─── Split (problem) ──────────────────────────────────── */

.split { display: grid; grid-template-columns: minmax(0,0.5fr) minmax(0,1fr); gap: clamp(36px,5vw,60px); align-items: start; }
.split-head h2 { margin: 0; font-size: clamp(30px, 4vw, 50px); }
.body-copy { max-width: 700px; }
.body-copy p { font-size: 19px; line-height: 1.78; }
.body-copy p + p { margin-top: 22px; }

/* ─── Cards ────────────────────────────────────────────── */

.moment-card, .step, .feature, .mode, .metric, .manual-card, .prompt-card {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--surface);
  transition: transform .26s, border-color .26s, box-shadow .26s;
}
.step, .feature, .mode, .metric, .manual-card, .prompt-card { padding: 30px; }
.step:hover, .feature:hover, .mode:hover, .metric:hover, .manual-card:hover, .prompt-card:hover {
  transform: translateY(-4px);
  border-color: var(--line-2);
  box-shadow: 0 30px 70px -40px var(--lav-glow);
}

/* demo */
.moment-grid { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,1.16fr) minmax(0,1fr); gap: 16px; align-items: stretch; }
.moment-card { min-height: 252px; }
.moment-card:hover { transform: translateY(-4px); box-shadow: 0 34px 80px -42px var(--lav-glow); }
.moment-card.featured { box-shadow: 0 0 0 1px var(--line-2), 0 30px 80px -40px var(--lav-glow); }

/* method */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4,1fr); gap: 16px; counter-reset: s; }
.step-number {
  display: inline-grid; place-items: center;
  width: 50px; height: 50px; margin-bottom: 26px;
  border: 1px solid var(--line-2); border-radius: 50%;
  background: var(--seal-soft); color: var(--seal);
  font-family: var(--body); font-size: 22px;
}
.step p, .feature p, .mode p, .metric p, .manual-card p, .prompt-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.66;
}

.feature-band { display: grid; grid-template-columns: repeat(4,1fr); gap: 16px; margin-top: 16px; }
.feature h3 { font-size: 18px; }

/* quickstart */
.runbook { border: 1px solid var(--line); border-radius: var(--r); background: var(--surface); padding: 24px; box-shadow: var(--shadow); }
.runbook-tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.run-tab {
  min-height: 38px; padding: 0 16px;
  border: 1px solid var(--line); border-radius: 999px;
  background: transparent; color: var(--paper-dim);
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.02em;
  transition: border-color .16s, background .16s, color .16s;
}
.run-tab:hover { color: var(--paper); border-color: var(--lav-deep); }
.run-tab.is-active { color: #fff; border-color: transparent; background: linear-gradient(135deg, var(--seal), #a83d28); }
.runbook-panel { display: grid; grid-template-columns: minmax(0,0.84fr) minmax(330px,1fr); gap: 22px; align-items: stretch; }
.run-label { margin-bottom: 10px; color: var(--seal); font-family: var(--mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; }
.run-copy h3 { font-size: 28px; margin-bottom: 14px; }
.run-copy > p { font-size: 16px; }
.run-expected { margin: 22px 0 16px; padding: 16px 18px; border: 1px solid var(--line-2); border-radius: var(--r); background: var(--lav-faint); }
.run-expected > span { display: block; margin-bottom: 6px; color: var(--lav); font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.14em; text-transform: uppercase; }
.run-expected p { margin: 0; font-size: 14.5px; }
.run-note { color: var(--muted); font-size: 13px; font-family: var(--mono); word-break: break-word; }
code { padding: 1px 6px; border-radius: 4px; background: var(--lav-faint); color: var(--lav); font-size: 0.9em; }
.console code { padding: 0; background: none; color: inherit; font-size: inherit; }
.run-command { align-self: stretch; }
.run-command .console-bar { justify-content: space-between; }
.copy-command {
  min-height: 26px; padding: 0 13px;
  border: 1px solid var(--line-2); border-radius: 999px;
  background: transparent; color: var(--paper-dim);
  font-family: var(--mono); font-size: 11px;
  transition: border-color .15s, color .15s;
}
.copy-command:hover { border-color: var(--seal); color: var(--paper); }

.mode-grid, .manual-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; margin-top: 16px; }
.tag { display: inline-block; margin-bottom: 22px; padding: 4px 13px; border: 1px solid var(--line-2); border-radius: 999px; background: var(--seal-soft); color: var(--seal); font-family: var(--mono); font-size: 11px; letter-spacing: 0.06em; }

.manual-grid { margin-top: 18px; }
.manual-card {
  background:
    linear-gradient(180deg, rgba(167,146,211,0.065), transparent 76%),
    var(--surface);
}
.manual-card h3 { font-size: 22px; }

.prompt-lab {
  margin-top: 18px;
  padding: clamp(26px, 4vw, 38px);
  border: 1px solid var(--line);
  border-radius: var(--r);
  background:
    radial-gradient(760px 320px at 16% 0%, var(--seal-soft), transparent 58%),
    radial-gradient(760px 320px at 100% 100%, var(--lav-faint), transparent 58%),
    var(--surface);
  box-shadow: var(--shadow);
}
.prompt-lab-head {
  display: grid;
  grid-template-columns: minmax(0, 0.78fr) minmax(280px, 0.72fr);
  gap: 28px;
  align-items: end;
  margin-bottom: 22px;
}
.prompt-lab-head h3 {
  margin: 0;
  font-size: clamp(26px, 3.4vw, 40px);
  line-height: 1.04;
}
.prompt-lab-head p:last-child {
  margin: 0;
  color: var(--paper-dim);
  font-size: 16px;
}
.prompt-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}
.prompt-card {
  min-height: 250px;
  display: flex;
  flex-direction: column;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--ink-0) 30%, transparent), transparent),
    rgba(7,7,13,0.34);
}
[data-theme="light"] .prompt-card {
  background:
    linear-gradient(180deg, rgba(255,255,255,0.36), transparent),
    rgba(251,246,236,0.5);
}
.prompt-card p {
  color: var(--paper);
  font-size: 14.5px;
}
.prompt-card small {
  display: block;
  margin-top: auto;
  padding-top: 22px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.55;
}

/* metrics */
.metric-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 16px; }
.metric > span { display: block; margin-bottom: 18px; color: var(--muted); font-family: var(--mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; }
.metric strong {
  display: block; margin-bottom: 12px;
  font-family: var(--disp); font-weight: 500;
  font-size: clamp(46px, 6vw, 74px); line-height: 0.88;
  color: var(--paper);
}
.metric:nth-child(1) strong, .metric:nth-child(3) strong { color: var(--lav); }
.metric:nth-child(2) strong, .metric:nth-child(4) strong { color: var(--seal); }

/* status */
.status {
  display: grid; grid-template-columns: minmax(0,1fr) auto; gap: 38px; align-items: end;
  padding: clamp(32px,5vw,58px);
  border: 1px solid var(--line-2); border-radius: var(--r);
  background: radial-gradient(120% 140% at 0% 100%, var(--lav-faint), transparent 55%), var(--surface);
  box-shadow: var(--shadow);
}
.status-copy h2 { font-size: clamp(30px,4vw,50px); margin-bottom: 18px; }
.status-copy p:last-child { max-width: 740px; margin: 0; font-size: 16.5px; }
.status-actions { display: flex; flex-wrap: wrap; gap: 12px; justify-content: flex-end; }

/* footer */
.footer {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 18px;
  width: min(var(--maxw), calc(100% - 48px)); margin: 0 auto;
  padding: 44px 0 64px; border-top: 1px solid var(--line); color: var(--muted);
}
.footer-mark { font-family: var(--disp); font-size: 23px; color: var(--paper); }
.footer-mark em { color: var(--seal); font-style: normal; }
.footer-line { font-family: var(--body); font-style: italic; font-size: 18px; }
.footer-links { display: flex; gap: 18px; font-family: var(--mono); font-size: 12.5px; }
.footer-links a:hover { color: var(--paper); }

/* ─── Responsive ───────────────────────────────────────── */

@media (max-width: 1020px) {
  .nav { display: none; }
  .hero, .split, .runbook-panel, .status { grid-template-columns: 1fr; }
  .hero-copy { grid-row: auto; }
  .hero { min-height: auto; }
  .agent-layer-visual { min-height: 390px; }
  .steps, .feature-band, .metric-grid { grid-template-columns: repeat(2,1fr); }
  .moment-grid, .mode-grid, .manual-grid, .prompt-lab-head { grid-template-columns: 1fr; }
  .prompt-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .status-actions { justify-content: flex-start; }
  .theme-track { width: 158px; }
}
@media (max-width: 600px) {
  .header-link { display: none; }
  .theme-track { width: 140px; font-size: 11px; }
  .steps, .feature-band, .metric-grid { grid-template-columns: 1fr; }
  .prompt-grid { grid-template-columns: 1fr; }
  .footer { flex-direction: column; align-items: flex-start; }
  .section { width: min(100% - 32px, var(--maxw)); }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 1ms !important; animation: none !important; }
  .reveal, .gate-eyebrow, .gate-title, .gate-line, .enter-button, .gate-foot { opacity: 1 !important; }
}