:root {
  --paper: #e4e8ea;
  --card: #f6f8f9;
  --slot: #eef1f2;
  --ink: #12171a;
  --ink-2: #5c686f;
  --ink-3: #8a959b;
  --rule: #c6cdd1;
  --signal: #d2540a;
  --signal-ink: #ffffff;
  --signal-wash: #f7e6da;
  --steel: #46535c;
  --ok: #1d7a52;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #10161a; --card: #1a2227; --slot: #222b31; --ink: #e6ecef;
    --ink-2: #99a6ad; --ink-3: #6b787f; --rule: #2c373e; --signal: #ff7a2e;
    --signal-ink: #180b02; --signal-wash: #2a1b10; --steel: #93a2ab; --ok: #4bbd8a;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font-family: var(--sans); font-size: 16px; line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
main { max-width: 560px; margin: 0 auto; min-height: 100vh; }
.loading { padding: 3rem 1.25rem; color: var(--ink-3); font-family: var(--mono); font-size: 0.85rem; }

/* header */
.head {
  position: sticky; top: 0; z-index: 5; background: var(--card);
  border-bottom: 1px solid var(--rule); padding: 0.9rem 1.25rem 0.75rem;
  padding-top: max(0.9rem, env(safe-area-inset-top));
}
.head h1 { margin: 0; font-size: 1.15rem; font-weight: 800; letter-spacing: -0.02em; }
.head .meta {
  margin-top: 3px; font-family: var(--mono); font-size: 0.7rem;
  color: var(--ink-3); letter-spacing: 0.01em;
}
.head .meta b { color: var(--signal); font-weight: 400; }

/* search */
.search { padding: 0.75rem 1.25rem 0.25rem; }
.search input {
  width: 100%; height: 42px; padding: 0 14px; font-size: 0.95rem; font-family: inherit;
  border: 1px solid var(--rule); border-radius: 8px; background: var(--card); color: var(--ink);
  -webkit-appearance: none;
}
.search input::placeholder { color: var(--ink-3); }
.search input:focus { outline: 2px solid var(--signal); outline-offset: -1px; }

/* section divider before out-of-stock */
.divider {
  margin: 0.6rem 0 0.2rem; padding-top: 0.9rem; border-top: 1px solid var(--rule);
  font-family: var(--mono); font-size: 0.68rem; text-transform: uppercase;
  letter-spacing: 0.06em; color: var(--ink-3);
}
.empty { padding: 2rem 0; color: var(--ink-3); font-family: var(--mono); font-size: 0.82rem; }

/* request call-to-action (from the search box) */
.cta { padding: 1rem 1.25rem; }
.req {
  width: 100%; min-height: 46px; padding: 12px 16px; font-family: var(--mono);
  font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.06em;
  border: none; border-radius: 8px; background: var(--signal); color: var(--signal-ink); cursor: pointer;
}
.req:active { transform: scale(0.98); }
.asking {
  padding: 0.9rem 1.25rem; font-family: var(--mono); font-size: 0.7rem;
  color: var(--ink-2); line-height: 1.5;
}
.asking span { color: var(--signal); }

/* category chips */
.chips {
  display: flex; gap: 6px; overflow-x: auto; padding: 0.7rem 1.25rem;
  scrollbar-width: none; -webkit-overflow-scrolling: touch;
}
.chips::-webkit-scrollbar { display: none; }
.chip {
  flex: 0 0 auto; font-size: 0.78rem; padding: 5px 12px; border-radius: 20px;
  border: 1px solid var(--rule); background: transparent; color: var(--ink-2);
  white-space: nowrap; cursor: pointer; font-family: inherit;
}
.chip[aria-pressed="true"] { background: var(--signal); border-color: var(--signal); color: var(--signal-ink); }

/* item rows */
.list { padding: 0 1.25rem; }
.row {
  display: flex; align-items: center; gap: 12px; padding: 12px 0;
  border-bottom: 1px solid var(--rule);
}
.row .body { flex: 1; min-width: 0; }
.row .name { font-size: 0.92rem; line-height: 1.25; }
.row .sub {
  margin-top: 3px; font-family: var(--mono); font-size: 0.7rem;
  color: var(--ink-3); font-variant-numeric: tabular-nums;
}
.row.flagged { background: var(--signal-wash); margin: 0 -1.25rem; padding: 12px 1.25rem; }
.row.flagged .sub { color: var(--signal); }
.row.out .name { color: var(--ink-2); }

.tap {
  flex: 0 0 auto; font-family: var(--mono); font-size: 0.68rem; text-transform: uppercase;
  letter-spacing: 0.06em; padding: 8px 12px; min-height: 38px; border-radius: 6px;
  border: 1px solid var(--signal); background: transparent; color: var(--signal);
  cursor: pointer; white-space: nowrap; transition: transform 0.08s ease;
}
.tap:active { transform: scale(0.94); }
.tap:disabled { border-color: var(--rule); color: var(--ink-3); cursor: default; }
.tap.done { border-color: transparent; color: var(--ok); }

/* request box */
.ask { margin: 1.1rem 1.25rem; padding: 1rem; border: 1px solid var(--signal);
  border-radius: 8px; background: var(--signal-wash); }
.ask label { display: block; font-size: 0.82rem; color: var(--signal);
  margin-bottom: 8px; font-weight: 500; }
.ask .field { display: flex; gap: 8px; }
.ask input {
  flex: 1; min-width: 0; height: 40px; padding: 0 12px; font-size: 0.9rem;
  font-family: inherit; border: 1px solid var(--rule); border-radius: 6px;
  background: var(--card); color: var(--ink);
}
.ask input:focus { outline: 2px solid var(--signal); outline-offset: -1px; }
.ask button {
  flex: 0 0 auto; height: 40px; padding: 0 16px; font-family: var(--mono);
  font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em;
  border: none; border-radius: 6px; background: var(--signal); color: var(--signal-ink);
  cursor: pointer;
}
.ask button:active { transform: scale(0.97); }
.ask .waiting { margin-top: 10px; font-family: var(--mono); font-size: 0.7rem; color: var(--signal); }
.ask .waiting span { display: block; }

/* toast */
.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%) translateY(20px);
  background: var(--ink); color: var(--paper); font-size: 0.82rem; padding: 10px 16px;
  border-radius: 8px; opacity: 0; transition: opacity 0.2s, transform 0.2s; pointer-events: none;
  z-index: 20; max-width: 90%;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* location picker (root route) */
.pick { padding: 3rem 1.25rem; }
.pick h1 { font-size: 1.4rem; font-weight: 800; letter-spacing: -0.02em; margin: 0 0 0.4rem; }
.pick p { color: var(--ink-2); margin: 0 0 1.5rem; }
.pick a {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem 1.25rem; margin-bottom: 10px; border: 1px solid var(--rule);
  border-radius: 8px; background: var(--card); color: var(--ink);
  text-decoration: none; font-weight: 500;
}
.pick a .arrow { color: var(--signal); font-family: var(--mono); }

@media (prefers-reduced-motion: reduce) {
  .tap, .ask button, .toast { transition: none; }
}