:root {
  --bg: #f6f4ee;
  --card-bg: #ffffff;
  --ink: #1f1a15;
  --muted: #6b6258;
  --accent: #d9534f;
  --accent-dark: #b8443f;
  --border: #e3ddd0;
  --ok: #3a7d44;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
}

header {
  padding: 28px 24px 8px;
  text-align: center;
}

header h1 {
  margin: 0 0 4px;
  font-size: 1.8rem;
}

.subtitle {
  margin: 0;
  color: var(--muted);
}

.tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin: 20px 0 0;
}

.tab-btn {
  border: 1px solid var(--border);
  background: var(--card-bg);
  padding: 8px 20px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.95rem;
  color: var(--muted);
}

.tab-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

main {
  max-width: 640px;
  margin: 24px auto 60px;
  padding: 0 16px;
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.field-label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
}

select, input[type="number"] {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.95rem;
  background: #fff;
  color: var(--ink);
}

.upload-row {
  display: flex;
  gap: 10px;
  margin: 18px 0 10px;
  flex-wrap: wrap;
}

.upload-btn {
  background: var(--ink);
  color: #fff;
  padding: 10px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.9rem;
  text-align: center;
}

.upload-btn:hover {
  opacity: 0.9;
}

.primary-btn {
  width: 100%;
  padding: 12px;
  margin-top: 16px;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}

.primary-btn:hover {
  background: var(--accent-dark);
}

.primary-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.secondary-btn {
  padding: 10px 16px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  font-size: 0.9rem;
}

.file-list {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 200px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
}

.file-list:empty {
  display: none;
}

.file-list li {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  padding: 6px 10px;
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
}

.file-list li:last-child {
  border-bottom: none;
}

.file-list .remove-file {
  cursor: pointer;
  color: var(--accent);
  font-weight: 700;
}

.file-summary {
  color: var(--muted);
  font-size: 0.85rem;
  margin: 8px 0 0;
}

.status-box {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
  color: var(--muted);
}

/* author rules above would otherwise beat the UA [hidden] default */
[hidden] {
  display: none !important;
}

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.error-box {
  margin-top: 14px;
  padding: 10px 12px;
  border-radius: 8px;
  background: #fdecea;
  color: #7a1f1a;
  font-size: 0.9rem;
}

.settings-note {
  margin-top: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.settings-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 18px;
}

.settings-grid label {
  font-size: 0.85rem;
  color: var(--muted);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.checkbox-field {
  flex-direction: row !important;
  align-items: center;
  gap: 8px !important;
}

.settings-saved-note {
  color: var(--ok);
  font-size: 0.85rem;
}

footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
  padding: 20px;
}

@media (max-width: 520px) {
  .settings-grid {
    grid-template-columns: 1fr;
  }
}