:root {
  --paper: #FBFBF9;
  --ink: #16191D;
  --muted: #6E7580;
  --line: #DDE1E6;
  --accent: #12594B;
  --accent-soft: #E8F0ED;
  --ok-bg: #E7F3EC;  --ok-ink: #14603C;
  --warn-bg: #FDF3DC; --warn-ink: #7A5B00;
  --err-bg: #FBEAEA;  --err-ink: #93231F;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
}

.wrap {
  max-width: 34rem;
  margin: 0 auto;
  padding: 1.75rem 1.125rem calc(3rem + env(safe-area-inset-bottom));
}

.screen[hidden], [hidden] { display: none !important; }

/* ---------- chữ ---------- */
.title {
  font-size: 1.25rem;
  font-weight: 650;
  letter-spacing: -0.015em;
  margin: 0 0 0.25rem;
}
.lede { color: var(--muted); font-size: 0.9375rem; margin: 0 0 1.5rem; }
.who { color: var(--muted); font-size: 0.8125rem; margin: 0; }
.loading { color: var(--muted); font-size: 0.9375rem; }

code {
  font-family: var(--mono);
  font-size: 0.875em;
  background: var(--accent-soft);
  padding: 0.05em 0.3em;
  border-radius: 3px;
}

/* ---------- header ---------- */
.head {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: baseline;
  gap: 0 0.75rem;
  padding-bottom: 1rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--line);
}
.head .title { grid-column: 1; }
.head .who { grid-column: 1; }
.linkbtn {
  grid-column: 2;
  grid-row: 1 / span 2;
  background: none;
  border: 0;
  padding: 0;
  font: inherit;
  font-size: 0.8125rem;
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  cursor: pointer;
}
.linkbtn--block {
  display: block;
  grid-column: auto;
  grid-row: auto;
  width: 100%;
  margin-top: 1rem;
  text-align: center;
}

/* ---------- tab ---------- */
.tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.25rem;
  padding: 0.25rem;
  margin-bottom: 1.5rem;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
}
.tab {
  padding: 0.5rem;
  font: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--muted);
  background: none;
  border: 0;
  border-radius: 0.375rem;
  cursor: pointer;
}
.tab--on { background: var(--accent-soft); color: var(--accent); }

/* ---------- form ---------- */
.field { margin-bottom: 1.125rem; }
.field--pair { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
@media (max-width: 26rem) { .field--pair { grid-template-columns: 1fr; gap: 0; } }
.field--pair .field { margin-bottom: 1.125rem; }

label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  margin-bottom: 0.375rem;
}

select,
input[type=text],
input[type=date],
input[type=month],
input[type=number] {
  width: 100%;
  padding: 0.6875rem 0.75rem;
  font: inherit;
  font-size: 1rem;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 0.4375rem;
}
input[type=file] { width: 100%; font-size: 0.875rem; padding: 0.5rem 0; }

select:focus, input:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
  border-color: var(--accent);
}

.hint { font-size: 0.75rem; color: var(--muted); margin: 0.3125rem 0 0; }
.hint--err { color: var(--err-ink); }

/* ---------- dải preview tên file ---------- */
.preview {
  margin: 1.5rem 0;
  padding: 0.875rem 0.9375rem 1rem;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
}
.preview__label {
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 0.5rem;
}
.preview__strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.125rem;
  font-family: var(--mono);
  font-size: 0.875rem;
  line-height: 1.9;
  word-break: break-all;
}
.preview__sub {
  margin: 0.625rem 0 0;
  font-size: 0.75rem;
  line-height: 1.45;
  color: var(--muted);
}
.seg { display: inline-block; }
.seg--lit { color: var(--muted); }
.seg--filled {
  color: var(--accent);
  font-weight: 600;
  background: var(--accent-soft);
  padding: 0.125rem 0.3125rem;
  border-radius: 3px;
}
.seg--empty {
  color: var(--muted);
  padding: 0.0625rem 0.25rem;
  border: 1px dashed var(--line);
  border-radius: 3px;
  opacity: 0.85;
}

/* ---------- thanh tiến trình ---------- */
.progress {
  height: 0.375rem;
  margin: 0 0 0.875rem;
  background: var(--line);
  border-radius: 999px;
  overflow: hidden;
}
.progress__bar {
  width: 0;
  height: 100%;
  background: var(--accent);
  border-radius: 999px;
  transition: width 0.15s linear;
}

/* ---------- nút ---------- */
.btn {
  width: 100%;
  padding: 0.8125rem;
  font: inherit;
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 0.4375rem;
  cursor: pointer;
}
.btn--primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }

/* ---------- thông báo ---------- */
.note {
  margin: 1rem 0 0;
  padding: 0.75rem 0.875rem;
  border-radius: 0.4375rem;
  font-size: 0.875rem;
  line-height: 1.55;
  background: #fff;
  border: 1px solid var(--line);
}
.note--ok   { background: var(--ok-bg);   border-color: transparent; color: var(--ok-ink); }
.note--warn { background: var(--warn-bg); border-color: transparent; color: var(--warn-ink); }
.note--err  { background: var(--err-bg);  border-color: transparent; color: var(--err-ink); }
.note a { color: inherit; }
.note .fname {
  display: block;
  margin-top: 0.375rem;
  background: rgba(0,0,0,0.05);
  word-break: break-all;
}

/* ---------- danh sách folder ---------- */
.folders { list-style: none; margin: 0 0 1rem; padding: 0; }
.folder {
  display: grid;
  grid-template-columns: 1.5rem 1fr;
  gap: 0.5rem;
  padding: 0.625rem 0;
  border-bottom: 1px solid var(--line);
}
.folder__state { font-weight: 700; text-align: center; }
.folder__state--ok { color: var(--accent); }
.folder__state--bad { color: var(--err-ink); }
.folder__state--wait { color: var(--muted); }
.folder__body { min-width: 0; }
.folder__label { display: block; font-size: 0.875rem; }
.folder__id {
  display: block;
  margin-top: 0.125rem;
  font-size: 0.6875rem;
  background: none;
  padding: 0;
  color: var(--muted);
  word-break: break-all;
}
.folder__id--bad { color: var(--err-ink); }

/* ---------- lịch sử ---------- */
.hist { list-style: none; margin: 0 0 1rem; padding: 0; }
.hist__item {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: start;
  gap: 0.625rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--line);
}
.hist__body { min-width: 0; }
.hist__name {
  display: block;
  font-family: var(--mono);
  font-size: 0.8125rem;
  word-break: break-all;
}
.hist__meta {
  display: block;
  margin-top: 0.1875rem;
  font-size: 0.75rem;
  color: var(--muted);
}
.hist__link {
  display: inline-block;
  margin-top: 0.25rem;
  font-size: 0.75rem;
  color: var(--accent);
}

.badge {
  display: inline-block;
  padding: 0.1875rem 0.4375rem;
  font-size: 0.6875rem;
  font-weight: 700;
  line-height: 1.3;
  white-space: nowrap;
  border-radius: 0.25rem;
}
.badge--ok   { background: var(--ok-bg);   color: var(--ok-ink); }
.badge--wait { background: var(--warn-bg); color: var(--warn-ink); }
.badge--bad  { background: var(--err-bg);  color: var(--err-ink); }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}