:root {
  color-scheme: dark;
  --bg: #0e1013;
  --bg-soft: #13161b;
  --panel: #171b22;
  --panel-2: #1c212a;
  --line: #262d38;
  --line-soft: #1f2530;
  --ink: #e9ecef;
  --muted: #9aa4af;
  --faint: #6b7581;
  --amber: #ffc857;
  --amber-deep: #e8a93c;
  --mint: #6ee7a0;
  --sky: #82aaff;
  --rose: #ff8b7e;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Cascadia Code", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.75;
  font-size: 16px;
}

::selection { background: rgba(255, 200, 87, 0.28); }

a { color: var(--sky); text-decoration: none; }
a:hover { text-decoration: underline; }

.shell {
  width: min(1060px, calc(100% - 40px));
  margin: 0 auto;
}

/* ---------- header ---------- */

header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(14, 16, 19, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line-soft);
}

nav {
  min-height: 60px;
  display: flex;
  align-items: center;
  gap: 28px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  white-space: nowrap;
  color: var(--ink);
  font-size: 15px;
}

.brand .logo {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background:
    radial-gradient(circle at 32% 32%, #f5f5f2 0 26%, transparent 27%),
    radial-gradient(circle at 68% 68%, #0a0a0a 0 26%, transparent 27%),
    linear-gradient(#c98f3d, #a9752c);
  border: 1px solid rgba(255, 255, 255, 0.14);
  flex: none;
}

.nav-links {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.nav-links::-webkit-scrollbar { display: none; }

.nav-links a {
  color: var(--muted);
  font-size: 14px;
  padding: 6px 10px;
  border-radius: 8px;
  white-space: nowrap;
}

.nav-links a:hover {
  color: var(--ink);
  background: var(--panel-2);
  text-decoration: none;
}

/* ---------- hero ---------- */

.hero-wrap {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line-soft);
  background:
    radial-gradient(1200px 500px at 80% -10%, rgba(255, 200, 87, 0.07), transparent 60%),
    var(--bg);
}

.board-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(900px 480px at 30% 20%, #000 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(900px 480px at 30% 20%, #000 0%, transparent 75%);
  pointer-events: none;
}

.stone {
  position: absolute;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  pointer-events: none;
}

.stone.black {
  background: radial-gradient(circle at 34% 30%, #3c4148, #0b0d10 65%);
  border: 1px solid #2c333d;
}

.stone.white {
  background: radial-gradient(circle at 34% 30%, #ffffff, #c9cdd2 70%);
  border: 1px solid #aeb4bb;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: 52px;
  align-items: center;
  padding: 70px 0 58px;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--amber);
  border: 1px solid rgba(255, 200, 87, 0.35);
  background: rgba(255, 200, 87, 0.08);
  border-radius: 999px;
  padding: 4px 12px;
  margin-bottom: 20px;
}

h1 {
  margin: 0 0 18px;
  font-size: clamp(32px, 4.6vw, 54px);
  line-height: 1.18;
  letter-spacing: 0.01em;
  font-weight: 800;
}

h1 .em { color: var(--amber); }

.lead {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 17px;
  max-width: 560px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 22px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 15px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  transition: transform 0.12s ease, background 0.12s ease;
}

.button:hover { text-decoration: none; transform: translateY(-1px); background: var(--panel-2); }

.button.primary {
  background: var(--amber);
  border-color: var(--amber);
  color: #201a0a;
}

.button.primary:hover { background: var(--amber-deep); border-color: var(--amber-deep); }

.browser {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.45);
  overflow: hidden;
  transform: rotate(0.6deg);
}

.browser-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line-soft);
  background: var(--panel-2);
}

.dot { width: 10px; height: 10px; border-radius: 50%; background: #3a4250; }
.dot:nth-child(1) { background: #ff6b62; }
.dot:nth-child(2) { background: #ffc857; }
.dot:nth-child(3) { background: #6ee7a0; }

.browser-url {
  margin-left: 10px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--faint);
  background: var(--bg);
  border: 1px solid var(--line-soft);
  border-radius: 6px;
  padding: 2px 10px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.browser img { display: block; width: 100%; height: auto; }

.browser figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--muted);
  border-top: 1px solid var(--line-soft);
}

/* ---------- sections ---------- */

section { padding: 64px 0; }

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

section.alt { background: var(--bg-soft); }

.sec-head { margin-bottom: 30px; max-width: 720px; }

.sec-kicker {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--amber);
  letter-spacing: 0.12em;
  margin-bottom: 8px;
}

h2 {
  margin: 0 0 10px;
  font-size: clamp(24px, 3vw, 32px);
  line-height: 1.3;
  font-weight: 800;
}

.sec-head p { margin: 0; color: var(--muted); }

h3 { margin: 0 0 10px; font-size: 18px; font-weight: 700; }

/* ---------- quick start ---------- */

.start-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  align-items: start;
}

.start-step {
  border: 1px solid var(--line-soft);
  background: var(--panel);
  border-radius: 14px;
  padding: 22px;
}

.start-no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  font-family: var(--mono);
  font-weight: 700;
  font-size: 16px;
  color: #201a0a;
  background: var(--amber);
  margin-bottom: 14px;
}

.start-step strong { display: block; font-size: 17px; margin-bottom: 6px; }
.start-step p { margin: 0; color: var(--muted); font-size: 14.5px; }

/* ---------- fold (details) ---------- */

details.fold {
  border-top: 1px solid var(--line-soft);
  margin-top: 16px;
}

details.fold summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 0 2px;
  color: var(--sky);
  font-size: 13.5px;
  font-weight: 600;
  user-select: none;
}

details.fold summary::-webkit-details-marker { display: none; }

details.fold summary::before {
  content: "▸";
  font-size: 12px;
  transition: transform 0.15s ease;
}

details.fold[open] summary::before { transform: rotate(90deg); }

details.fold pre {
  margin: 10px 0 0;
  padding: 14px 16px;
  background: var(--bg-soft);
  border: 1px solid var(--line-soft);
  border-radius: 10px;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

/* ---------- accordion (big details) ---------- */

details.acc {
  border: 1px solid var(--line-soft);
  background: var(--panel);
  border-radius: 14px;
  margin-bottom: 12px;
  overflow: hidden;
}

details.acc > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 22px;
  user-select: none;
  transition: background 0.12s ease;
}

details.acc > summary:hover { background: var(--panel-2); }
details.acc > summary::-webkit-details-marker { display: none; }

details.acc > summary .acc-no {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--amber);
  white-space: nowrap;
}

details.acc > summary .acc-title { font-weight: 700; font-size: 17px; }

details.acc > summary .acc-hint {
  color: var(--faint);
  font-size: 13.5px;
  margin-left: auto;
  white-space: nowrap;
}

details.acc > summary .chev {
  color: var(--faint);
  font-size: 13px;
  transition: transform 0.15s ease;
  flex: none;
}

details.acc[open] > summary .chev { transform: rotate(90deg); }
details.acc[open] > summary { border-bottom: 1px solid var(--line-soft); }

.acc-body { padding: 20px 22px; }

.acc-body > .why { color: var(--muted); margin: 0 0 16px; font-size: 15px; }

/* ---------- panels ---------- */

.station-cols {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.panel {
  border: 1px solid var(--line-soft);
  background: var(--bg-soft);
  border-radius: 10px;
  padding: 14px 18px;
}

.panel h4 {
  margin: 0 0 8px;
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 8px;
}

.panel h4 .tag-dot { width: 8px; height: 8px; border-radius: 50%; flex: none; }
.tag-dot.ok { background: var(--mint); }
.tag-dot.no { background: var(--rose); }
.tag-dot.info { background: var(--sky); }

.panel ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 14.5px;
}

.panel li { margin: 5px 0; }
.panel li::marker { color: var(--faint); }

/* ---------- roadmap ---------- */

.stages { display: grid; gap: 0; }

.stage {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 20px;
  position: relative;
  padding-bottom: 22px;
}

.stage:last-child { padding-bottom: 0; }

.stage::before {
  content: "";
  position: absolute;
  left: 31px;
  top: 46px;
  bottom: 4px;
  width: 2px;
  background: var(--line-soft);
}

.stage:last-child::before { display: none; }

.stage-no {
  width: 46px;
  height: 46px;
  margin: 0 auto;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-weight: 700;
  font-size: 18px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  color: var(--amber);
  position: relative;
  z-index: 1;
}

.stage-body {
  border: 1px solid var(--line-soft);
  background: var(--panel);
  border-radius: 12px;
  padding: 14px 20px;
}

.stage-body .title-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
}

.stage-body strong { font-size: 16.5px; }

.chip {
  display: inline-block;
  font-size: 12px;
  color: var(--mint);
  border: 1px solid rgba(110, 231, 160, 0.35);
  background: rgba(110, 231, 160, 0.08);
  border-radius: 999px;
  padding: 1px 10px;
  white-space: nowrap;
}

.stage-body p { margin: 2px 0 0; color: var(--muted); font-size: 14px; }

/* ---------- table ---------- */

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
}

th, td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--line-soft);
  vertical-align: top;
}

th {
  color: var(--faint);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

td:first-child { color: var(--ink); font-weight: 600; white-space: nowrap; }
td { color: var(--muted); }
tr:last-child td { border-bottom: none; }

.table-wrap {
  border: 1px solid var(--line-soft);
  border-radius: 10px;
  overflow-x: auto;
  background: var(--bg-soft);
}

/* ---------- workflow ---------- */

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

.loop {
  counter-reset: loop;
  margin: 0;
  padding: 0;
  list-style: none;
}

.loop li {
  counter-increment: loop;
  display: flex;
  gap: 14px;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px dashed var(--line-soft);
  color: var(--ink);
  font-size: 15px;
}

.loop li:last-child { border-bottom: none; }

.loop li::before {
  content: counter(loop);
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--amber);
  border: 1px solid var(--line);
  background: var(--panel-2);
  border-radius: 8px;
  min-width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: none;
  transform: translateY(4px);
}

.loop li small { color: var(--faint); display: block; font-size: 13px; }

.tree {
  background: var(--bg-soft);
  border: 1px solid var(--line-soft);
  border-radius: 10px;
  padding: 16px 18px;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.9;
  color: var(--muted);
  overflow-x: auto;
  margin: 10px 0 0;
}

.tree .f { color: var(--ink); }
.tree .c { color: var(--faint); }

/* ---------- prompts ---------- */

.prompt-card {
  border: 1px solid var(--line-soft);
  border-radius: 12px;
  background: var(--panel);
  margin-bottom: 12px;
}

.prompt-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px 0;
}

.prompt-head strong { font-size: 15px; }
.prompt-head span { color: var(--faint); font-size: 12.5px; }

.prompt-card details.fold { border-top: none; margin: 0; padding: 0 18px 14px; }
.prompt-card details.fold summary { padding-top: 8px; }

.copy-btn {
  flex: none;
  font: 600 12.5px/1 var(--mono);
  color: var(--amber);
  background: transparent;
  border: 1px solid rgba(255, 200, 87, 0.4);
  border-radius: 7px;
  padding: 6px 12px;
  cursor: pointer;
  transition: background 0.12s ease;
}

.copy-btn:hover { background: rgba(255, 200, 87, 0.12); }
.copy-btn.done { color: var(--mint); border-color: rgba(110, 231, 160, 0.4); }

/* ---------- quest page ---------- */

.quest-main {
  padding: 46px 0 70px;
}

.quest-head {
  border-bottom: 1px solid var(--line-soft);
  background:
    radial-gradient(900px 360px at 90% -20%, rgba(255, 200, 87, 0.06), transparent 62%),
    var(--bg);
  padding: 44px 0 34px;
}

.breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--sky);
  font-size: 14px;
  margin-bottom: 18px;
}

.quest-head h1 {
  max-width: 820px;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.meta-chip {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  border: 1px solid var(--line-soft);
  background: var(--panel);
  border-radius: 999px;
  color: var(--muted);
  font: 600 12.5px/1 var(--mono);
  padding: 0 12px;
}

.quest-stack {
  display: grid;
  gap: 18px;
}

.quest-section {
  border: 1px solid var(--line-soft);
  background: var(--panel);
  border-radius: 14px;
  padding: 22px;
}

.quest-section > h2 {
  font-size: 22px;
  margin-bottom: 14px;
}

.quest-section > p:last-child {
  margin-bottom: 0;
}

.quest-lead {
  margin: 0;
  color: var(--muted);
  max-width: 760px;
}

.step-list {
  counter-reset: step;
  display: grid;
  gap: 12px;
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
}

.step-list li {
  counter-increment: step;
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  color: var(--muted);
}

.step-list li::before {
  content: counter(step);
  width: 30px;
  height: 30px;
  border: 1px solid var(--line);
  border-radius: 9px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--panel-2);
  color: var(--amber);
  font: 700 13px/1 var(--mono);
}

.step-list strong {
  color: var(--ink);
  display: block;
  margin-bottom: 2px;
}

.visual-checklist {
  display: grid;
  gap: 10px;
  margin: 0;
}

.visual-checklist label {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  color: var(--muted);
}

.visual-checklist input {
  width: 18px;
  height: 18px;
  accent-color: var(--amber);
  transform: translateY(4px);
}

.resume-block {
  position: relative;
  border: 1px solid var(--line-soft);
  background: var(--bg-soft);
  border-radius: 12px;
  padding: 16px;
  margin-top: 10px;
}

.resume-block pre {
  margin: 0;
  color: var(--ink);
  font: 13.5px/1.8 var(--mono);
  white-space: pre-wrap;
  word-break: break-word;
}

.copy-row {
  margin-top: 12px;
}

.note {
  color: var(--faint);
  font-size: 13.5px;
  margin: 10px 0 0;
}

.next-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- v2 components ---------- */

.quest-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 32px;
  border: 1px solid var(--line-soft);
  background: var(--panel);
  color: var(--muted);
  border-radius: 999px;
  padding: 0 12px;
  font-size: 13px;
  font-weight: 700;
}

.quest-chip:hover {
  text-decoration: none;
  background: var(--panel-2);
}

.quest-chip.done {
  color: var(--mint);
  border-color: rgba(110, 231, 160, 0.35);
  background: rgba(110, 231, 160, 0.08);
}

.quest-chip.side {
  color: var(--amber);
  border-color: rgba(255, 200, 87, 0.38);
  background: rgba(255, 200, 87, 0.06);
}

.quest-chip.side::after {
  content: "支线";
  color: var(--faint);
  font: 700 11px/1 var(--mono);
}

.progress-meter {
  border: 1px solid var(--line-soft);
  background: var(--panel);
  border-radius: 14px;
  padding: 16px;
}

.progress-track {
  height: 12px;
  border-radius: 999px;
  background: var(--bg-soft);
  border: 1px solid var(--line-soft);
  overflow: hidden;
}

.progress-fill {
  width: 0%;
  height: 100%;
  background: var(--amber);
  border-radius: inherit;
  transition: width 0.2s ease;
}

.badge-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 10px;
}

.badge-tile {
  border: 1px solid var(--line-soft);
  background: var(--panel);
  border-radius: 12px;
  min-height: 88px;
  padding: 12px;
  display: grid;
  align-content: center;
  gap: 5px;
  position: relative;
  overflow: hidden;
}

.badge-tile .badge-icon {
  font-size: 24px;
  line-height: 1;
}

.badge-tile .badge-name {
  font-size: 13px;
  font-weight: 700;
}

.badge-tile.locked {
  color: var(--faint);
}

.badge-tile.locked::after {
  content: "🔒";
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(14, 16, 19, 0.68);
  font-size: 20px;
}

.badge-tile.unlocked {
  border-color: rgba(255, 200, 87, 0.35);
  background: rgba(255, 200, 87, 0.06);
  animation: badge-pop 0.18s ease;
}

@keyframes badge-pop {
  from { opacity: 0.72; transform: scale(0.98); }
  to { opacity: 1; transform: scale(1); }
}

.complete-card {
  border: 1px solid var(--line-soft);
  background: var(--bg-soft);
  border-radius: 14px;
  padding: 18px;
}

.complete-btn {
  width: 100%;
  min-height: 54px;
  border: 1px solid var(--amber);
  background: var(--amber);
  color: #201a0a;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 800;
  cursor: pointer;
  transition: transform 0.12s ease, background 0.12s ease;
}

.complete-btn:hover {
  background: var(--amber-deep);
  border-color: var(--amber-deep);
  transform: translateY(-1px);
}

.complete-btn.done {
  color: var(--mint);
  background: rgba(110, 231, 160, 0.08);
  border-color: rgba(110, 231, 160, 0.38);
}

.complete-result {
  display: none;
  margin-top: 14px;
  border: 1px solid rgba(110, 231, 160, 0.28);
  background: rgba(110, 231, 160, 0.06);
  border-radius: 12px;
  padding: 14px 16px;
}

.complete-result.show {
  display: block;
}

.complete-result strong {
  display: block;
  margin-bottom: 4px;
}

.undo-link {
  margin-top: 10px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--faint);
  font-size: 13px;
  cursor: pointer;
}

.undo-link:hover {
  color: var(--sky);
}

/* ---------- deploy ---------- */

.url-line {
  font-family: var(--mono);
  font-size: 13.5px;
  background: var(--bg-soft);
  border: 1px solid var(--line-soft);
  border-radius: 10px;
  padding: 14px 18px;
  color: var(--muted);
  overflow-x: auto;
  line-height: 2;
  margin: 0;
}

.url-line .hl { color: var(--amber); }
.url-line .me { color: var(--mint); }

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

/* ---------- checklist ---------- */

.check-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 14px;
  counter-reset: q;
}

.check {
  counter-increment: q;
  border: 1px solid var(--line-soft);
  background: var(--panel);
  border-radius: 12px;
  padding: 18px 20px;
  position: relative;
}

.check::before {
  content: "Q" counter(q);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--amber);
  display: block;
  margin-bottom: 6px;
}

.check strong { display: block; font-size: 15.5px; margin-bottom: 2px; }
.check span { color: var(--faint); font-size: 13.5px; }

.closing {
  margin-top: 26px;
  border-left: 3px solid var(--amber);
  background: rgba(255, 200, 87, 0.06);
  border-radius: 0 10px 10px 0;
  padding: 14px 20px;
  color: var(--ink);
  font-size: 15.5px;
}

footer {
  border-top: 1px solid var(--line-soft);
  padding: 36px 0 48px;
  color: var(--faint);
  font-size: 14px;
}

footer .shell {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  justify-content: space-between;
  align-items: center;
}

/* ---------- responsive ---------- */

@media (max-width: 920px) {
  .hero { grid-template-columns: 1fr; padding: 48px 0 44px; gap: 36px; }
  .browser { transform: none; }
  .stone { display: none; }
  .start-grid { grid-template-columns: 1fr; }
  .station-cols { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  details.acc > summary .acc-hint { display: none; }
}

@media (max-width: 580px) {
  .shell { width: calc(100% - 28px); }
  section { padding: 48px 0; }
  .stage { grid-template-columns: 48px minmax(0, 1fr); gap: 12px; }
  .stage::before { left: 23px; }
  .actions .button { width: 100%; }
  .acc-body { padding: 16px; }
  .quest-head { padding: 34px 0 26px; }
  .quest-main { padding: 34px 0 52px; }
  .quest-section { padding: 18px 16px; }
  .badge-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .badge-tile { min-height: 74px; padding: 8px; }
  .badge-tile .badge-name { font-size: 11.5px; }
}