/* areaesti — 全自动楼栋足迹估算的复核界面
   信息层级靠字号、字重与留白建立；背景色块只用于真正的状态语义。 */

:root {
  --bg: #fbfbfa;
  --surface: #ffffff;
  --line: #e6e4e0;
  --line-strong: #d3d0ca;
  --ink: #1b1a18;
  --ink-soft: #55524c;
  --ink-faint: #8a867e;
  --accent: #0f7d73;
  --accent-soft: #e6f2f0;
  --warn: #8a5a12;
  --warn-soft: #fdf3e2;
  --danger: #9a2f2a;
  --danger-soft: #fbeceb;
  --outline: #12b3a6;
  --reference: #d98324;
  --radius: 10px;
  --radius-lg: 14px;
  --shadow: 0 1px 2px rgba(24, 22, 18, .05), 0 8px 24px rgba(24, 22, 18, .05);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16161a;
    --surface: #1e1e23;
    --line: #2e2e35;
    --line-strong: #3d3d46;
    --ink: #f2f1ee;
    --ink-soft: #b8b5ae;
    --ink-faint: #85827b;
    --accent: #4fd0c2;
    --accent-soft: #16302e;
    --warn: #e0b268;
    --warn-soft: #322817;
    --danger: #e8918b;
    --danger-soft: #33201f;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .28);
  }
}

* { box-sizing: border-box; }

/* `display: grid/flex` on a class outranks the browser's [hidden] rule, so a
   hidden section would otherwise still lay out. */
[hidden] { display: none !important; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.shell {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px 64px;
}

/* ---------- 顶栏 ---------- */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 0 26px;
  flex-wrap: wrap;
}

.brand { display: flex; align-items: baseline; gap: 10px; }

.brand-mark {
  width: 9px; height: 9px;
  border-radius: 2px;
  background: var(--accent);
  align-self: center;
}

.brand-name { font-size: 17px; font-weight: 600; letter-spacing: -.01em; }

.brand-note {
  font-size: 13px;
  color: var(--ink-faint);
  padding-left: 10px;
  border-left: 1px solid var(--line);
}

.topbar-side { display: flex; align-items: center; gap: 18px; }

.service { display: inline-flex; align-items: center; gap: 7px; font-size: 13px; color: var(--ink-soft); }

.service-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--ink-faint);
}
.service-dot[data-state="ready"]    { background: var(--accent); }
.service-dot[data-state="degraded"] { background: var(--warn); }
.service-dot[data-state="blocked"]  { background: var(--danger); }

.access { position: relative; font-size: 13px; }

.access summary {
  cursor: pointer;
  color: var(--ink-soft);
  list-style: none;
  padding: 4px 2px;
  border-bottom: 1px solid transparent;
}
.access summary::-webkit-details-marker { display: none; }
.access summary:hover { color: var(--ink); border-bottom-color: var(--line-strong); }

.access-body {
  position: absolute;
  right: 0; top: calc(100% + 10px);
  width: 288px;
  padding: 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  z-index: 20;
}

.access-body label { display: block; font-size: 12px; color: var(--ink-soft); margin-bottom: 6px; }

/* ---------- 搜索 ---------- */

.search {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px 14px;
  align-items: end;
  padding: 24px 0 8px;
  border-top: 1px solid var(--line);
}

.search-field label {
  display: block;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 8px;
}

.search .hint { grid-column: 1 / -1; margin: 0; }

input[type="text"], input[type="password"], #postal {
  width: 100%;
  padding: 11px 13px;
  font: inherit;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  transition: border-color .15s ease, box-shadow .15s ease;
}

#postal { font-size: 18px; letter-spacing: .06em; font-variant-numeric: tabular-nums; }

input:focus-visible {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.hint { font-size: 13px; color: var(--ink-faint); margin: 0; }

/* ---------- 模式切换 ---------- */

.modes {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 4px;
}

.mode {
  display: grid;
  gap: 3px;
  text-align: left;
  padding: 13px 16px;
  font: inherit;
  color: var(--ink-soft);
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color .15s ease, background-color .15s ease, color .15s ease;
}
.mode:hover { border-color: var(--ink-faint); color: var(--ink); }
.mode[aria-selected="true"] {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
}
.mode:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.mode-name { font-size: 14.5px; font-weight: 600; }
.mode-desc { font-size: 12.5px; color: var(--ink-faint); }
.mode[aria-selected="true"] .mode-desc { color: inherit; opacity: .85; }

/* ---------- 两种口径的对照 ---------- */

.compare {
  display: grid;
  gap: 5px;
  padding: 12px 14px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
  font-size: 13px;
}
.compare-title { font-size: 12px; letter-spacing: .04em; text-transform: uppercase; color: var(--ink-faint); }
.compare-row { display: flex; justify-content: space-between; gap: 12px; }
.compare-row b { font-weight: 500; font-variant-numeric: tabular-nums; }
.compare-note { font-size: 12px; color: var(--ink-faint); line-height: 1.45; margin-top: 3px; }

/* ---------- 候选轮廓（占地面积模式）---------- */

.choices { border-top: 1px solid var(--line); padding-top: 18px; }
.choice-list { display: grid; gap: 8px; }

.choice {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 8px 12px 8px 8px;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
  text-align: left;
  font: inherit;
  color: var(--ink);
  transition: border-color .15s ease, background-color .15s ease;
}
.choice:hover:not(:disabled) { border-color: var(--ink-faint); }
.choice:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.choice[aria-current="true"] { border-color: var(--accent); background: var(--accent-soft); }
.choice canvas { display: block; width: 52px; height: 52px; border-radius: 6px; background: var(--line); }
.choice-area { font-weight: 500; font-variant-numeric: tabular-nums; }
.choice-note { display: block; font-size: 12px; color: var(--ink-faint); }
.choice-pick { font-size: 12px; color: var(--accent); font-weight: 500; }

/* ---------- 板数估算卡 ---------- */

.estimates { display: grid; gap: 10px; }

.estimate {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: baseline;
  gap: 4px 14px;
  padding: 13px 15px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.estimate[data-primary="true"] { border-color: var(--accent); background: var(--accent-soft); }

.estimate-label { font-size: 13px; color: var(--ink-soft); }
.estimate-count { font-size: 22px; font-weight: 600; font-variant-numeric: tabular-nums; letter-spacing: -.01em; }
.estimate-count small { font-size: 13px; font-weight: 500; color: var(--ink-soft); margin-left: 4px; }
.estimate-spec { grid-column: 1 / -1; font-size: 12px; color: var(--ink-faint); font-variant-numeric: tabular-nums; }

/* ---------- 方案能力说明 ---------- */

.capability { border-top: 1px solid var(--line); padding-top: 18px; }

.cap-list { display: grid; gap: 10px; margin: 0; }
.cap-list dt {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
}
.cap-list dd {
  margin: 2px 0 0;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--ink-soft);
}
.cap-list dd em { font-style: normal; color: var(--ink-faint); }
.cap-list dd.limit { color: var(--warn); }

/* ---------- 屋顶掩码 ---------- */

.mask-row { display: grid; gap: 7px; margin-top: 14px; }
.btn-sm { padding: 7px 13px; font-size: 13px; justify-self: start; }
.mask-note { font-size: 12px; color: var(--ink-faint); line-height: 1.5; }
.mask-note[data-level="warn"] { color: var(--warn); }

/* ---------- 分区标题 ---------- */

.section-title { font-size: 14px; font-weight: 600; margin: 0 0 4px; }
.section-help { font-size: 12.5px; color: var(--ink-faint); margin: 0 0 12px; }
.areas, .segments { border-top: 1px solid var(--line); padding-top: 18px; }

/* ---------- 屋面构成 ---------- */

.segment-list { display: grid; gap: 7px; }

.segment {
  display: grid;
  grid-template-columns: 62px 1fr auto;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

.segment-compass { color: var(--ink-soft); }
.segment-bar { height: 5px; border-radius: 3px; background: var(--line); overflow: hidden; }
.segment-bar i { display: block; height: 100%; background: var(--accent); border-radius: 3px; }
.segment-area { color: var(--ink-soft); }
.segment-more { font-size: 12px; color: var(--ink-faint); padding-top: 2px; }

/* ---------- 按钮 ---------- */

.btn {
  font: inherit;
  font-size: 14px;
  font-weight: 500;
  padding: 9px 16px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color .15s ease, border-color .15s ease, color .15s ease, opacity .15s ease;
}

.btn-lg { padding: 11px 24px; font-size: 15px; }

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover:not(:disabled) { filter: brightness(1.07); }

.btn-quiet {
  background: transparent;
  color: var(--ink-soft);
  border-color: var(--line-strong);
}
.btn-quiet:hover:not(:disabled) { color: var(--ink); border-color: var(--ink-faint); }

.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.row { display: flex; gap: 8px; margin-top: 12px; }

/* ---------- 提示条 ---------- */

.alert {
  margin: 20px 0 0;
  padding: 13px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  background: var(--danger-soft);
  color: var(--danger);
  border: 1px solid color-mix(in srgb, var(--danger) 22%, transparent);
}

/* ---------- 结果布局 ---------- */

.result {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(320px, 1fr);
  gap: 28px;
  margin-top: 28px;
  align-items: start;
}

.canvas-wrap {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--surface);
  box-shadow: var(--shadow);
}

#canvas { display: block; width: 100%; height: auto; }

.canvas-overlay {
  position: absolute;
  inset: auto 0 0 0;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 16px;
  padding: 14px 16px;
  pointer-events: none;
  background: linear-gradient(to top, rgba(12, 11, 10, .58), transparent);
}

.scalebar { display: grid; gap: 5px; color: #fff; font-size: 12px; font-variant-numeric: tabular-nums; }
.scalebar-line {
  display: block; height: 3px;
  background: #fff;
  border-radius: 1px;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, .35);
}

.legend { display: flex; gap: 14px; color: #fff; font-size: 12px; flex-wrap: wrap; justify-content: flex-end; }
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.legend i {
  width: 16px; height: 0;
  border-top-width: 3px;
  border-top-style: solid;
  border-radius: 2px;
}

/* 骨架屏：内容始终占位，不做整屏闪烁 */
.canvas-skeleton {
  position: absolute; inset: 0;
  background:
    linear-gradient(100deg, transparent 20%, rgba(255, 255, 255, .28) 50%, transparent 80%),
    var(--line);
  background-size: 220% 100%, auto;
  animation: sweep 1.4s ease-in-out infinite;
}
@keyframes sweep { from { background-position: 180% 0, 0 0; } to { background-position: -80% 0, 0 0; } }
@media (prefers-reduced-motion: reduce) { .canvas-skeleton { animation: none; } }

/* ---------- 侧栏 ---------- */

.panel { display: grid; gap: 26px; }

.readout-label {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.readout-value {
  margin: 4px 0 0;
  font-size: 46px;
  font-weight: 600;
  letter-spacing: -.025em;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}

.readout-unit { font-size: 19px; font-weight: 500; color: var(--ink-soft); margin-left: 8px; }

.readout-sub { margin: 8px 0 0; font-size: 14px; color: var(--ink-soft); }

.facts { display: grid; grid-template-columns: auto 1fr; gap: 9px 18px; margin: 0; font-size: 14px; }
.facts dt { color: var(--ink-faint); }
.facts dd { margin: 0; text-align: right; font-variant-numeric: tabular-nums; }
.facts dd.mono { font-family: var(--mono); font-size: 13px; }

.notices { display: grid; gap: 9px; }

.notice {
  display: flex;
  gap: 9px;
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--ink-soft);
  padding-left: 11px;
  border-left: 2px solid var(--line-strong);
}
.notice[data-level="warn"] { color: var(--warn); border-left-color: var(--warn); }
.notice[data-level="review"] {
  color: var(--warn);
  border-left-color: var(--warn);
  background: var(--warn-soft);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 10px 12px;
}

.actions { display: flex; gap: 10px; flex-wrap: wrap; }
.actions .btn { flex: 1; min-width: 130px; }

.disclaimer {
  margin: 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--ink-faint);
}

/* ---------- 响应式 ---------- */

@media (max-width: 900px) {
  .modes { grid-template-columns: minmax(0, 1fr); }
  .result { grid-template-columns: minmax(0, 1fr); }
  .shell { padding: 0 16px 48px; }
  .search { grid-template-columns: minmax(0, 1fr); }
  .readout-value { font-size: 38px; }
  .topbar { gap: 12px; }
}