/* ==========================================================================
   湖畔小筑 · Lakeside Retreat — design tokens + layout
   Same token family as the Field Notebook site, tuned for a transactional
   trust register: paper texture kept, editorial voice dropped.
   ========================================================================== */

:root {
  --paper: #f5efe1;
  --paper-shade: #ece3cf;
  --ink: #2a241d;
  --ink-soft: #58493a;
  --ink-quiet: #7a6a58;
  --accent: #8f4a3d;
  --accent-hover: #7a3e33;
  --accent-soft: #d9a89e;
  --rule: #cbb994;
  --card: #fbf6ea;
  --card-shade: #f4ecd8;
  --sold-tint: rgba(143, 74, 61, 0.06);
  --success: #4f7350;

  --serif: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", "Songti SC", "STSong", serif;
  --sans: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", Roboto, sans-serif;
  --mono: "SF Mono", ui-monospace, Menlo, Consolas, monospace;

  --s-1: 8px; --s-2: 16px; --s-3: 24px; --s-4: 32px; --s-6: 48px; --s-8: 64px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body { min-height: 100%; }

body {
  background:
    radial-gradient(1200px 800px at 15% -10%, #f7f0e0 0%, transparent 60%),
    radial-gradient(900px 700px at 90% 110%, #efe4c9 0%, transparent 55%),
    var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  padding-bottom: var(--s-8);
}

a { color: inherit; text-decoration: none; }

/* --- header --------------------------------------------------------------- */
.topbar {
  max-width: 1080px;
  margin: 0 auto;
  padding: var(--s-3) var(--s-3);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--s-3);
  border-bottom: 1px solid var(--rule);
  flex-wrap: wrap;
}
.brand { display: flex; align-items: baseline; gap: 10px; }
.brand-dot {
  width: 7px; height: 7px; background: var(--accent);
  border-radius: 50%; display: inline-block; transform: translateY(-2px);
}
.brand-name { font-family: var(--serif); font-weight: 600; font-size: 20px; letter-spacing: 0.01em; }
.brand-sub {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--ink-soft);
}
.topbar nav { font-family: var(--mono); font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; }
.topbar nav a {
  color: var(--ink-soft); padding-bottom: 3px;
  border-bottom: 1px solid transparent; transition: color .15s, border-color .15s;
}
.topbar nav a:hover { color: var(--ink); border-bottom-color: var(--rule); }

/* --- layout --------------------------------------------------------------- */
main { max-width: 1080px; margin: 0 auto; padding: var(--s-4) var(--s-3) 0; }
.wrap { margin-top: var(--s-4); }

/* --- hero + search -------------------------------------------------------- */
.hero {
  background: linear-gradient(180deg, #fbf6ea 0%, #f6ecd5 100%);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: var(--s-6) var(--s-4);
  margin-bottom: var(--s-6);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    repeating-linear-gradient(0deg, rgba(150,120,60,.035) 0 1px, transparent 1px 3px),
    repeating-linear-gradient(90deg, rgba(150,120,60,.02) 0 1px, transparent 1px 5px);
  pointer-events: none; mix-blend-mode: multiply;
}
.hero > * { position: relative; }
.eyebrow {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--ink-soft); margin-bottom: var(--s-2);
}
.hero h1 {
  font-family: var(--serif); font-weight: 500; font-size: 40px;
  letter-spacing: -0.01em; line-height: 1.15; margin-bottom: var(--s-2);
}
.hero .lede { color: var(--ink-soft); font-size: 17px; margin-bottom: var(--s-4); max-width: 46ch; }

.search-form {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: var(--s-2);
  align-items: end;
  max-width: 620px;
}
.search-form label {
  display: flex; flex-direction: column; gap: 6px;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--ink-soft);
}
.search-form input[type="date"] {
  padding: 10px 12px; border: 1px solid var(--rule);
  background: var(--paper); color: var(--ink);
  border-radius: 3px; font-family: var(--serif); font-size: 15px;
  min-height: 42px;
}
.search-form input[type="date"]:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.microhint {
  grid-column: 1 / -1;
  font-family: var(--serif); font-style: italic; color: var(--ink-soft);
  font-size: 14px; margin-top: -4px;
}

/* --- button base ---------------------------------------------------------- */
.btn, button {
  padding: 11px 22px; background: var(--ink); color: var(--paper);
  border: none; font-family: var(--mono); font-size: 12px;
  letter-spacing: 0.14em; text-transform: uppercase;
  cursor: pointer; border-radius: 3px; min-height: 42px;
  transition: background .15s;
}
.btn:hover, button:hover { background: var(--accent); }
.btn.secondary { background: transparent; color: var(--ink-soft); border: 1px solid var(--rule); }
.btn.secondary:hover { color: var(--ink); border-color: var(--ink); background: transparent; }
button:disabled, button.disabled {
  background: var(--paper-shade); color: var(--ink-quiet);
  cursor: not-allowed; border: 1px solid var(--rule);
}

/* --- section headings ----------------------------------------------------- */
.section-label {
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--ink-soft);
  margin-bottom: var(--s-3);
  display: flex; align-items: center;
}
.section-label::after {
  content: ""; flex: 1; height: 1px; background: var(--rule);
  margin-left: var(--s-2); opacity: 0.6;
}
.wrap h2 {
  font-family: var(--serif); font-weight: 500; font-size: 26px;
  letter-spacing: -0.005em; margin-bottom: var(--s-1);
}
.wrap .hint { color: var(--ink-soft); font-size: 15px; margin-bottom: var(--s-4); font-style: italic; }
.crumbs {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--ink-soft); margin-bottom: var(--s-3);
}
.crumbs a { border-bottom: 1px solid transparent; padding-bottom: 2px; }
.crumbs a:hover { color: var(--ink); border-bottom-color: var(--rule); }

/* --- room card grid ------------------------------------------------------- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--s-2);
}

.card {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: var(--s-3);
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
  position: relative;
  transition: box-shadow .15s, transform .15s;
}
.card:hover { box-shadow: 0 8px 24px -14px rgba(60,40,10,.3); transform: translateY(-1px); }
.card.sold { background: var(--card-shade); opacity: 0.7; }
.card.sold:hover { transform: none; box-shadow: none; cursor: default; }

.card-head { display: flex; align-items: baseline; justify-content: space-between; gap: var(--s-2); }
.card h3 {
  font-family: var(--serif); font-weight: 500; font-size: 20px;
  letter-spacing: -0.005em; line-height: 1.2;
}
.card .price {
  font-family: var(--mono); font-size: 13px; color: var(--ink-soft);
  letter-spacing: 0.02em; white-space: nowrap;
}
.card .price strong { color: var(--ink); font-size: 15px; font-weight: 500; }
.card p.desc { color: var(--ink-soft); font-size: 15px; line-height: 1.5; }

.card .summary {
  padding: var(--s-1) 0;
  border-top: 1px dashed var(--rule);
  font-family: var(--mono); font-size: 12px; color: var(--ink-soft);
  letter-spacing: 0.02em; display: flex; justify-content: space-between; align-items: baseline;
}
.card .summary .total {
  font-family: var(--serif); font-size: 15px; color: var(--ink);
}
.card .summary .total strong { color: var(--accent); font-weight: 500; }

.book-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-1);
  margin-top: var(--s-1);
}
.book-form input {
  padding: 10px 12px; border: 1px solid var(--rule);
  background: var(--paper); color: var(--ink);
  font-family: var(--serif); font-size: 14px; border-radius: 3px;
}
.book-form input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.book-form button { grid-column: 1 / -1; }

.sold-badge {
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--accent);
  border: 1px solid var(--accent-soft); padding: 2px 8px; border-radius: 2px;
}

/* --- zero-availability ---------------------------------------------------- */
.zero-note {
  background: var(--card);
  border: 1px solid var(--rule);
  border-left: 3px solid var(--accent);
  padding: var(--s-3);
  margin-bottom: var(--s-4);
}
.zero-note h3 {
  font-family: var(--serif); font-weight: 500; font-size: 18px; margin-bottom: 6px;
}
.zero-note p { color: var(--ink-soft); font-size: 15px; }

/* --- 409 conflict page ---------------------------------------------------- */
.conflict {
  max-width: 640px; margin: 0 auto;
  background: var(--card); border: 1px solid var(--rule);
  border-radius: 3px; padding: var(--s-6) var(--s-4);
  text-align: left;
}
.conflict h2 {
  font-family: var(--serif); font-weight: 500; font-size: 26px;
  margin-bottom: var(--s-2);
}
.conflict > p {
  color: var(--ink-soft); font-size: 16px; margin-bottom: var(--s-4);
}
.night-strip {
  display: flex; flex-wrap: wrap; gap: 6px;
  padding: var(--s-2) 0; margin-bottom: var(--s-3);
}
.night {
  padding: 8px 12px; border: 1px solid var(--rule);
  border-radius: 3px; background: var(--paper);
  font-family: var(--mono); font-size: 12px; color: var(--ink-soft);
  min-width: 88px; text-align: center;
}
.night.taken {
  background: var(--accent); color: #fff;
  border-color: var(--accent);
  text-decoration: line-through; text-decoration-color: rgba(255,255,255,0.5);
}
.night small { display: block; font-size: 10px; opacity: 0.75; margin-top: 2px; }
.conflict-actions {
  display: flex; gap: var(--s-2); margin-top: var(--s-3); flex-wrap: wrap;
}

/* --- confirmation --------------------------------------------------------- */
.conf {
  max-width: 560px; margin: var(--s-6) auto 0;
  background: var(--card); border: 1px solid var(--rule);
  border-radius: 3px; padding: var(--s-8) var(--s-4);
  text-align: center; position: relative;
}
.conf .eyebrow { justify-content: center; text-align: center; }
.conf h2 {
  font-family: var(--serif); font-weight: 500; font-size: 30px;
  margin-bottom: var(--s-1); letter-spacing: -0.01em;
}
.conf .conf-sub {
  color: var(--ink-soft); font-style: italic; margin-bottom: var(--s-4); font-size: 16px;
}
.conf-code-wrap {
  padding: var(--s-3);
  border: 1px dashed var(--rule);
  background: var(--paper);
  border-radius: 3px;
  margin: var(--s-3) 0;
  display: flex; flex-direction: column; align-items: center; gap: var(--s-1);
}
.conf-code {
  font-family: var(--mono); font-size: 40px; font-weight: 500;
  color: var(--accent); letter-spacing: 0.08em;
  user-select: all; cursor: text;
}
.conf-code-copy {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--ink-soft);
  border: none; background: transparent; padding: 4px 8px; cursor: pointer;
  min-height: 0; border-radius: 2px;
}
.conf-code-copy:hover { background: var(--paper-shade); color: var(--ink); }
.conf-warn {
  font-size: 14px; color: var(--ink-soft); font-style: italic;
  margin-bottom: var(--s-3); line-height: 1.5;
}
.conf dl {
  display: grid; grid-template-columns: auto 1fr; gap: 10px var(--s-3);
  max-width: 320px; margin: 0 auto var(--s-4);
  font-size: 15px; text-align: left;
}
.conf dt {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--ink-soft); padding-top: 4px;
}
.conf dd { font-family: var(--serif); color: var(--ink); }
.conf dd.mono { font-family: var(--mono); font-size: 14px; }

/* --- footer --------------------------------------------------------------- */
footer {
  max-width: 1080px; margin: var(--s-8) auto 0;
  padding: var(--s-3);
  border-top: 1px solid var(--rule);
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em;
  color: var(--ink-soft);
  display: flex; justify-content: space-between; gap: var(--s-2); flex-wrap: wrap;
}
footer .sig {
  font-family: var(--serif); font-style: italic; font-size: 13px;
  letter-spacing: 0; color: var(--ink);
}

/* --- responsive ----------------------------------------------------------- */
@media (max-width: 620px) {
  body { font-size: 16px; }
  .topbar { padding: var(--s-2) var(--s-2); }
  main { padding: var(--s-3) var(--s-2) 0; }
  .hero { padding: var(--s-4) var(--s-3); }
  .hero h1 { font-size: 30px; }
  .search-form { grid-template-columns: 1fr 1fr; }
  .search-form button { grid-column: 1 / -1; }
  .grid { grid-template-columns: 1fr; }
  .conf { padding: var(--s-4) var(--s-3); }
  .conf-code { font-size: 32px; }
  .book-form { grid-template-columns: 1fr; }
  footer { flex-direction: column; gap: 4px; }
}