/* MergeZIP — Stage 8 UI */

:root {
  --ink: #1a1a1a;
  --muted: #5a5a55;
  --bg: #f4f3ef;
  --panel: #ffffff;
  --line: #d8d5cc;
  --accent: #0b6e4f;
  --warn: #8a5a00;
  --err: #9b1c1c;
}

body {
  font-family: "Segoe UI", "Helvetica Neue", sans-serif;
  margin: 0;
  line-height: 1.5;
  color: var(--ink);
  background:
    radial-gradient(ellipse at top left, #e8eee9 0%, transparent 55%),
    linear-gradient(180deg, #f7f6f2 0%, var(--bg) 100%);
  min-height: 100vh;
}

header {
  padding: 1.5rem 1.75rem 0.5rem;
  border-bottom: 1px solid var(--line);
}

header h1 {
  font-size: 1.85rem;
  margin: 0;
  letter-spacing: -0.02em;
}

main {
  max-width: 44rem;
  padding: 1.25rem 1.75rem 3rem;
}

.lead {
  color: var(--muted);
  margin: 0 0 1.25rem;
}

.upload-form fieldset {
  border: 1px solid var(--line);
  background: var(--panel);
  margin: 0 0 1rem;
  padding: 0.85rem 1rem 1rem;
}

.upload-form legend {
  font-weight: 600;
  padding: 0 0.35rem;
}

.upload-form label {
  display: block;
  margin: 0.35rem 0;
  font-size: 0.95rem;
}

.upload-form input[type="file"] {
  display: block;
  width: 100%;
}

.upload-form button,
button {
  appearance: none;
  border: 0;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  padding: 0.55rem 1.1rem;
  cursor: pointer;
}

.upload-form button:hover,
button:hover {
  filter: brightness(1.05);
}

.hint,
.meta,
.note {
  color: var(--muted);
  font-size: 0.92rem;
}

.archive {
  margin: 1.25rem 0;
  padding: 0.85rem 0 0;
  border-top: 1px solid var(--line);
}

.archive h2 {
  font-size: 1.15rem;
  margin: 0 0 0.35rem;
}

.filename {
  margin: 0 0 0.75rem;
  color: var(--muted);
  font-size: 0.9rem;
}

dl {
  display: grid;
  grid-template-columns: 8rem 1fr;
  gap: 0.35rem 0.75rem;
  margin: 0;
}

dt {
  color: var(--muted);
  font-size: 0.9rem;
}

dd {
  margin: 0;
}

.warnings {
  margin: 0.75rem 0 0;
  padding-left: 1.2rem;
  color: var(--warn);
}

.error {
  color: var(--err);
  font-weight: 600;
}

code {
  font-family: ui-monospace, "Cascadia Code", monospace;
  font-size: 0.9em;
}

a {
  color: var(--accent);
}

.confidence {
  font-weight: 600;
}

.confidence-high {
  color: var(--accent);
}

.confidence-medium {
  color: var(--warn);
}

.confidence-low {
  color: var(--err);
}

.factors {
  margin: 0.75rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.factors ul {
  margin: 0.35rem 0 0;
  padding-left: 1.2rem;
}

.missing {
  color: var(--muted);
}

.merge-policy {
  margin: 1.5rem 0 0;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.merge-policy h2 {
  font-size: 1.15rem;
  margin: 0 0 0.35rem;
}

.policy-line {
  margin: 0 0 0.5rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.merge-ok {
  color: var(--accent);
  font-weight: 600;
}

.merge-blocked {
  color: var(--err);
  font-weight: 600;
}

.merge-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  filter: none;
}

.merge-form fieldset {
  border: 1px solid var(--line);
  background: var(--panel);
  margin: 0.75rem 0 1rem;
  padding: 0.85rem 1rem 1rem;
}

.merge-form legend {
  font-weight: 600;
  padding: 0 0.35rem;
}

.merge-form label {
  display: block;
  margin: 0.45rem 0 0.25rem;
  font-size: 0.95rem;
}

.merge-form select,
.merge-form input[type="text"] {
  display: block;
  width: 100%;
  max-width: 28rem;
  font: inherit;
  padding: 0.4rem 0.5rem;
  border: 1px solid var(--line);
  background: #fff;
}

.merge-modes .mode-option {
  display: flex;
  gap: 0.65rem;
  align-items: flex-start;
  margin: 0.65rem 0 0;
  padding: 0.55rem 0.45rem;
  border: 1px solid transparent;
  cursor: pointer;
}

.merge-modes .mode-option:has(input:checked) {
  border-color: var(--line);
  background: #f7faf8;
}

.merge-modes .mode-option input[type="radio"] {
  margin-top: 0.3rem;
  flex-shrink: 0;
}

.merge-modes .mode-text {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.merge-modes .mode-label {
  font-weight: 600;
}

.merge-modes .mode-desc {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.4;
}

.file-list {
  margin: 0.25rem 0 0;
  padding-left: 1.2rem;
}

.download-row {
  margin: 1.25rem 0 0.5rem;
}

a.download-btn {
  display: inline-block;
  appearance: none;
  border: 0;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  padding: 0.55rem 1.1rem;
  text-decoration: none;
  cursor: pointer;
}

a.download-btn:hover {
  filter: brightness(1.05);
  color: #fff;
}