:root {
  --bg: #F7F6F2;
  --surface: #FFFFFF;
  --ink: #14171F;
  --ink-2: #4B4F58;
  --muted: #8A8F99;
  --line: rgba(20, 23, 31, 0.10);
  --line-2: rgba(20, 23, 31, 0.18);
  --accent: #FF6B47;
  --accent-hover: #E8592F;
  --accent-soft: #FFF1EC;
  --teal: #21C7A8;
  --teal-soft: #E7F8F4;
  --danger: #C2412D;
  --danger-soft: #FDEEEA;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.55 'IBM Plex Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
h1, h2 { font-family: 'Space Grotesk', system-ui, sans-serif; margin: 0; letter-spacing: -0.015em; }
button { font: inherit; }
[hidden] { display: none !important; }
.wrap { width: 100%; max-width: 760px; margin: 0 auto; padding: 0 16px; }
.muted { color: var(--muted); font-size: 13px; }

/* header */
.top { border-bottom: 1px solid var(--line); background: rgba(247, 246, 242, 0.92); }
.top-in { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 12px; }
.brand { display: flex; align-items: center; gap: 10px; font: 700 19px 'Space Grotesk', sans-serif; letter-spacing: -0.02em; }
.brand b { color: var(--accent); }
.quota { font-size: 13px; color: var(--ink-2); background: var(--surface); border: 1px solid var(--line); border-radius: 999px; padding: 6px 12px; white-space: nowrap; }
.quota b { color: var(--ink); }
.quota.low b { color: var(--danger); }

/* intro */
.intro { padding: 44px 0 24px; }
.intro h1 { font-size: clamp(28px, 5vw, 38px); line-height: 1.12; }
.intro p { color: var(--ink-2); margin: 12px 0 0; max-width: 560px; }

/* notice */
.notice { border-radius: 10px; padding: 12px 14px; margin-bottom: 16px; font-size: 14px; background: var(--danger-soft); color: var(--danger); border: 1px solid rgba(194, 65, 45, 0.2); }

/* card */
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 24px; margin-bottom: 20px; }
.label { display: block; font-weight: 600; font-size: 14px; margin: 0 0 8px; }
.label + .drop, .label + textarea { margin-bottom: 4px; }
.card .label:not(:first-child) { margin-top: 22px; }

/* drop zone */
.drop {
  border: 1.5px dashed var(--line-2);
  border-radius: 12px;
  background: #FBFAF7;
  cursor: pointer;
  transition: border-color .15s, background .15s;
  outline: none;
}
.drop:hover, .drop:focus-visible { border-color: var(--ink); }
.drop.over { border-color: var(--accent); background: var(--accent-soft); }
.drop.has-file { border-style: solid; cursor: default; background: var(--surface); }
.drop-empty { text-align: center; padding: 34px 16px; }
.drop-empty p { margin: 8px 0 0; }
.drop-empty u { text-decoration-color: var(--accent); text-underline-offset: 3px; }
.drop-file { display: flex; align-items: center; gap: 14px; padding: 14px; }
.thumb { width: 52px; height: 52px; border-radius: 8px; background: var(--bg) center/cover no-repeat; border: 1px solid var(--line); flex-shrink: 0; display: grid; place-items: center; font: 600 11px 'IBM Plex Sans', sans-serif; color: var(--ink-2); }
.meta { min-width: 0; flex: 1; }
.fname { font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.x { border: 0; background: none; width: 36px; height: 36px; border-radius: 8px; font-size: 22px; line-height: 1; color: var(--ink-2); cursor: pointer; }
.x:hover { background: var(--bg); color: var(--ink); }

/* textarea */
textarea {
  width: 100%;
  resize: vertical;
  min-height: 84px;
  border: 1.5px solid var(--line-2);
  border-radius: 10px;
  padding: 12px 14px;
  font: inherit;
  color: var(--ink);
  background: var(--surface);
  outline: none;
  transition: border-color .15s;
}
textarea:focus { border-color: var(--ink); }
textarea::placeholder { color: var(--muted); }
.hint-row { display: flex; justify-content: space-between; gap: 12px; }

.turnstile { margin-top: 18px; min-height: 0; }

/* button */
.btn {
  margin-top: 22px;
  width: 100%;
  height: 50px;
  border: 0;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: background .15s, opacity .15s;
}
.btn:hover:not(:disabled) { background: var(--accent-hover); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.spinner { display: none; width: 18px; height: 18px; border: 2px solid rgba(255,255,255,.45); border-top-color: #fff; border-radius: 50%; animation: spin .8s linear infinite; }
.btn.loading { opacity: 1; cursor: progress; }
.btn.loading .spinner { display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }
.status { text-align: center; margin: 10px 0 0; min-height: 20px; }

.btn-ghost { border: 1.5px solid var(--line-2); background: var(--surface); color: var(--ink); border-radius: 8px; padding: 7px 14px; font-weight: 600; font-size: 13px; cursor: pointer; transition: border-color .15s; }
.btn-ghost:hover { border-color: var(--ink); }
.btn-ghost.done { border-color: var(--teal); color: #138A73; }

/* result */
.result-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }
.result-head h2 { font-size: 20px; }
.actions { display: flex; gap: 8px; }
.warn { background: var(--accent-soft); color: #9A3A1F; border-radius: 8px; padding: 10px 12px; font-size: 14px; margin: 0 0 14px; }
.kv { width: 100%; border-collapse: collapse; margin-bottom: 16px; font-size: 14px; }
.kv th, .kv td { text-align: left; vertical-align: top; padding: 10px 0; border-top: 1px solid var(--line); }
.kv tr:last-child th, .kv tr:last-child td { border-bottom: 1px solid var(--line); }
.kv th { width: 36%; padding-right: 16px; color: var(--ink-2); font-weight: 500; }
.kv td { white-space: pre-wrap; word-break: break-word; }
.kv td.empty { color: var(--muted); font-style: italic; }
details summary { cursor: pointer; font-weight: 600; font-size: 14px; padding: 4px 0; }
details summary::marker { color: var(--accent); }
pre {
  margin: 10px 0 0;
  background: #FBFAF7;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px;
  max-height: 520px;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
  font: 13.5px/1.6 'IBM Plex Mono', ui-monospace, monospace;
}

/* rules + footer */
.rules { margin: 4px 0 40px; padding: 0 0 0 18px; color: var(--ink-2); font-size: 13.5px; }
.rules li { margin: 4px 0; }
.rules li::marker { color: var(--teal); }
.foot { margin-top: auto; border-top: 1px solid var(--line); font-size: 13px; color: var(--muted); }
.foot .wrap { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding-top: 20px; padding-bottom: 20px; }
.foot b { color: var(--ink); font-family: 'Space Grotesk', sans-serif; }

@media (max-width: 560px) {
  .card { padding: 18px; }
  .intro { padding-top: 28px; }
  .kv th, .kv td { display: block; width: 100%; padding: 2px 0; border: 0; }
  .kv th { padding-top: 10px; border-top: 1px solid var(--line); }
  .kv td { padding-bottom: 10px; }
}
.kv th::first-letter { text-transform: uppercase; }