:root {
  --ink: #1c1c1e;
  --muted: #6b675f;
  --line: #e6e1d8;
  --paper: #f6f3ee;
  --card: #fffcf8;
  --accent: #9a4b24;
  --dot: #c8c2b8;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", sans-serif;
  line-height: 1.55;
}

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

.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 36px 20px 64px;
}

.masthead {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 40px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.brand {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: lowercase;
  color: var(--muted);
}

.brand:hover { color: var(--accent); text-decoration: none; }

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  font-size: 14px;
}

.nav a { color: var(--muted); }
.nav a:hover { color: var(--accent); text-decoration: none; }
.nav a.is-current { color: var(--ink); }

.page-header { margin-bottom: 28px; }

h1 {
  margin: 0 0 8px;
  font-size: 32px;
  font-weight: 650;
  letter-spacing: -0.03em;
}

.lead {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
}

.kicker {
  margin: 0 0 8px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.section {
  margin-top: 36px;
}

.section-title {
  margin: 0 0 12px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.doors {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.door {
  display: block;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px 18px 18px;
  color: inherit;
  min-height: 148px;
}

.door:hover {
  text-decoration: none;
  border-color: #d4c9b8;
}

.door h2 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 640;
  letter-spacing: -0.02em;
}

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

.cards,
.apps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.card,
.apps > li {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px 18px 16px;
}

.row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: baseline;
}

h2 {
  margin: 0;
  font-size: 18px;
  font-weight: 640;
  letter-spacing: -0.02em;
}

.os {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  white-space: nowrap;
}

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

p.desc { margin: 10px 0 12px; font-size: 15px; }

.links { margin: 0; font-size: 14px; }
.links span { color: var(--dot); margin: 0 6px; }

.note-list { display: grid; gap: 12px; }

.note-item {
  display: block;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px 18px 16px;
  color: inherit;
}

.note-item:hover {
  text-decoration: none;
  border-color: #d4c9b8;
}

.note-item time {
  display: block;
  margin: 0 0 6px;
  font-size: 13px;
  color: var(--muted);
}

.note-item h2 { margin: 0 0 6px; }
.note-item p { margin: 0; color: var(--muted); font-size: 14px; }

.prose { font-size: 16px; }
.prose p { margin: 0 0 16px; }
.prose p:last-child { margin-bottom: 0; }
.prose ul {
  margin: 0 0 16px;
  padding-left: 1.2em;
}
.prose li { margin: 0 0 8px; }
.prose li:last-child { margin-bottom: 0; }

.back {
  margin: 28px 0 0;
  font-size: 14px;
}

.meta {
  margin: 0 0 20px;
  color: var(--muted);
  font-size: 13px;
}

.pending {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 13px;
}

footer {
  margin-top: 40px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

footer p { margin: 0; }
footer a { color: var(--muted); }

.hearth-body {
  background: #2c2620;
  color: #efe8dc;
}

.hearth-body .wrap {
  max-width: 520px;
  padding-top: 72px;
}

.hearth-gate h1,
.hearth-room h1 {
  color: #efe8dc;
  font-size: 28px;
}

.hearth-gate .lead,
.hearth-room .lead {
  color: #b8aea0;
}

.hearth-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 28px;
}

.hearth-form label {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: #b8aea0;
}

.hearth-form input {
  width: 100%;
  border: 1px solid #5a5046;
  border-radius: 12px;
  background: #3a322b;
  color: #efe8dc;
  font: inherit;
  padding: 12px 14px;
}

.hearth-form input:focus {
  outline: none;
  border-color: #c4a07a;
}

.hearth-form button,
.lamp-switch {
  appearance: none;
  border: 1px solid #c4a07a;
  border-radius: 999px;
  background: transparent;
  color: #efe8dc;
  font: inherit;
  font-size: 14px;
  padding: 10px 18px;
  cursor: pointer;
}

.hearth-form button:hover,
.lamp-switch:hover {
  background: rgba(196, 160, 122, 0.16);
}

.hearth-error {
  min-height: 1.4em;
  margin: 0;
  font-size: 13px;
  color: #d9a08a;
}

.hearth-room { display: none; }
.hearth-body.is-open .hearth-gate { display: none; }
.hearth-body.is-open .hearth-room { display: block; }

.room {
  margin-top: 36px;
  min-height: 320px;
  border-radius: 20px;
  padding: 28px 24px;
  background: #1f1b17;
  border: 1px solid #3d342c;
  transition: background 0.4s ease, border-color 0.4s ease;
}

.hearth-body.is-lit .room {
  background: #4a3c2e;
  border-color: #c4a07a;
}

.lamp-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 28px;
}

.lamp {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #4a433c;
  box-shadow: none;
  transition: background 0.35s ease, box-shadow 0.35s ease;
}

.hearth-body.is-lit .lamp {
  background: #f3d7a0;
  box-shadow: 0 0 28px 8px rgba(243, 215, 160, 0.45);
}

.letter {
  min-height: 160px;
  border-radius: 8px;
  background: #d9cbb4;
  color: #3a322b;
  padding: 22px 20px;
  opacity: 0.22;
  transition: opacity 0.4s ease;
}

.hearth-body.is-lit .letter { opacity: 1; }

.letter p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
}

@media (max-width: 640px) {
  .masthead {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  h1 { font-size: 28px; }

  .doors { grid-template-columns: 1fr; }

  .door { min-height: 0; }
}