/* ── Custom properties ────────────────────────────────────────────────────── */
:root {
  --c-bg:              #f0f4f0;
  --c-card:            #ffffff;
  --c-text:            #1a1a1a;
  --c-text-muted:      #6b7280;
  --c-border:          #e5e7eb;
  --c-primary:         #1b4332;
  --c-primary-hover:   #153424;
  --c-secondary-bg:    #e9ecef;
  --c-secondary-hover: #dee2e6;

  --c-available:    #166534;
  --c-available-bg: #dcfce7;
  --c-waitlist:     #92400e;
  --c-waitlist-bg:  #fef3c7;
  --c-notfound:     #374151;
  --c-notfound-bg:  #f3f4f6;
  --c-error:        #991b1b;
  --c-error-bg:     #fee2e2;
  --c-ku:           #9a3412;
  --c-ku-bg:        #ffedd5;

  --shadow:    0 1px 3px 0 rgb(0 0 0 / .10), 0 1px 2px -1px rgb(0 0 0 / .10);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / .10), 0 2px 4px -2px rgb(0 0 0 / .10);
  --radius:    8px;
  --radius-sm: 4px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.5;
  min-height: 100vh;
}

/* ── App shell ────────────────────────────────────────────────────────────── */
.app {
  max-width: 980px;
  margin: 0 auto;
  padding: 28px 16px 56px;
}

.app-header { margin-bottom: 28px; }
.app-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--c-primary);
}
.app-header p { color: var(--c-text-muted); margin-top: 4px; }

/* ── Cards ────────────────────────────────────────────────────────────────── */
.card {
  background: var(--c-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
}
.card h2 {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--c-text-muted);
  margin-bottom: 16px;
}

/* ── Main two-column grid ─────────────────────────────────────────────────── */
.main-grid {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 16px;
  margin-bottom: 16px;
}
@media (max-width: 680px) {
  .main-grid { grid-template-columns: 1fr; }
}

/* ── Libraries panel ──────────────────────────────────────────────────────── */
#libraries-panel {
  display: flex;
  flex-direction: column;
}

#library-list { flex: 1; }

.library-entry {
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  margin-bottom: 8px;
  background: #f9fafb;
}
.library-entry-top {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}
.lib-name-input {
  flex: 1;
  min-width: 0;
  font-weight: 600;
  font-size: 0.875rem;
  border: none;
  background: transparent;
  color: var(--c-text);
  outline: none;
}
.lib-name-input:focus {
  outline: 1px solid var(--c-primary);
  border-radius: 2px;
  padding: 0 2px;
}
.lib-key-badge {
  font-size: 0.7rem;
  padding: 2px 7px;
  background: var(--c-available-bg);
  color: var(--c-available);
  border-radius: 20px;
  font-family: monospace;
  white-space: nowrap;
  flex-shrink: 0;
}
.lib-key-badge.invalid {
  background: var(--c-error-bg);
  color: var(--c-error);
}
.btn-remove {
  background: none;
  border: none;
  color: var(--c-text-muted);
  cursor: pointer;
  font-size: 1.1rem;
  line-height: 1;
  padding: 2px 5px;
  border-radius: 3px;
  flex-shrink: 0;
}
.btn-remove:hover { background: var(--c-error-bg); color: var(--c-error); }

.lib-url-input {
  width: 100%;
  font-size: 0.78rem;
  padding: 5px 8px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  background: white;
  color: var(--c-text);
}
.lib-url-input:focus {
  outline: none;
  border-color: var(--c-primary);
}

.library-footer {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--c-border);
}
.save-status { font-size: 0.8rem; color: #16a34a; }
.save-status.error { color: var(--c-error); }

/* ── Buttons ──────────────────────────────────────────────────────────────── */
.btn-primary {
  background: var(--c-primary);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  padding: 7px 16px;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s;
}
.btn-primary:hover:not(:disabled) { background: var(--c-primary-hover); }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-secondary {
  background: var(--c-secondary-bg);
  color: var(--c-text);
  border: none;
  border-radius: var(--radius-sm);
  padding: 7px 14px;
  font-size: 0.875rem;
  cursor: pointer;
  transition: background 0.15s;
}
.btn-secondary:hover { background: var(--c-secondary-hover); }

/* ── Tooltip ─────────────────────────────────────────────────────────────── */
.help-icon {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--c-text-muted);
  cursor: default;
  position: relative;
}
.help-icon::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: #1a1a1a;
  color: #fff;
  font-size: 0.75rem;
  line-height: 1.4;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  white-space: normal;
  width: 220px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s;
  z-index: 10;
}
.help-icon:hover::after { opacity: 1; }

/* ── Run panel ────────────────────────────────────────────────────────────── */
#run-panel {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

/* ── Drop zone ────────────────────────────────────────────────────────────── */
.drop-zone {
  display: block;
  border: 2px dashed var(--c-border);
  border-radius: var(--radius);
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  transition: border-color 0.15s, background 0.15s;
  background: #fafafa;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
}
.drop-zone:hover, .drop-zone.drag-over {
  border-color: var(--c-primary);
  background: #f0fdf4;
}
.drop-zone-inner {
  padding: 28px 20px;
  text-align: center;
}
.drop-zone .icon { font-size: 2rem; margin-bottom: 8px; }
.drop-zone p { color: var(--c-text-muted); font-size: 0.875rem; }
.drop-zone .link {
  color: var(--c-primary);
  cursor: pointer;
  text-decoration: underline;
}
.drop-hint-mobile { display: none; }
.drop-hint-tip {
  margin: 6px 0 0;
  font-size: 0.8rem;
  color: var(--c-text-muted, #888);
}
@media (hover: none) and (pointer: coarse) {
  .drop-hint-desktop { display: none; }
  .drop-hint-mobile  { display: block; }
  .drop-zone-inner   { padding: 36px 20px; }
  .drop-zone .icon   { font-size: 2.5rem; }
}

.file-selected {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 14px 16px;
  background: #f0fdf4;
}
.file-name { font-weight: 600; font-size: 0.875rem; color: var(--c-available); }
.book-count { font-size: 0.8rem; color: var(--c-text-muted); margin-top: 2px; }
.btn-clear {
  background: none;
  border: none;
  color: var(--c-text-muted);
  cursor: pointer;
  font-size: 1.25rem;
  line-height: 1;
  padding: 0 4px;
  flex-shrink: 0;
}
.btn-clear:hover { color: var(--c-error); }

/* ── Options ──────────────────────────────────────────────────────────────── */
.options { display: flex; flex-direction: column; gap: 10px; }
.option-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--c-text-muted);
}
.option-row input[type="checkbox"] { accent-color: var(--c-primary); width: 15px; height: 15px; }
.option-row input[type="range"]    { flex: 1; accent-color: var(--c-primary); }
.delay-val { min-width: 34px; font-size: 0.8rem; font-family: monospace; }

/* ── Filters ─────────────────────────────────────────────────────────────────── */
.filters {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  padding-top: 2px;
  border-top: 1px solid var(--c-border);
}
.filter-row {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--c-text-muted);
  flex: 1;
  min-width: 130px;
}
.filter-row label { white-space: nowrap; font-size: 0.8rem; }
.filter-row select {
  flex: 1;
  font-size: 0.8rem;
  padding: 4px 6px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  background: white;
  color: var(--c-text);
  cursor: pointer;
}
.filter-row select:focus { outline: none; border-color: var(--c-primary); }
.filter-row input[type="number"] {
  width: 64px;
  font-size: 0.8rem;
  padding: 4px 6px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  background: white;
  color: var(--c-text);
  text-align: center;
}
.filter-row input[type="number"]:focus { outline: none; border-color: var(--c-primary); }
.filter-unit { font-size: 0.8rem; color: var(--c-text-muted); white-space: nowrap; }

.btn-run {
  background: var(--c-primary);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  padding: 12px 20px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
.btn-run:hover:not(:disabled) { background: var(--c-primary-hover); }
.btn-run:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-stop {
  background: var(--c-error-bg);
  color: var(--c-error);
  border: 1px solid #fca5a5;
  border-radius: var(--radius-sm);
  padding: 3px 10px;
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s;
}
.btn-stop:hover { background: #fecaca; }

/* ── Progress ─────────────────────────────────────────────────────────────── */
#progress-panel { margin-bottom: 16px; }
.progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  font-size: 0.875rem;
}
.progress-header-right {
  display: flex;
  align-items: center;
  gap: 10px;
}
.progress-bar {
  height: 6px;
  background: var(--c-border);
  border-radius: 3px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: var(--c-primary);
  border-radius: 3px;
  transition: width 0.35s ease;
}
.current-book {
  margin-top: 8px;
  font-size: 0.8rem;
  color: var(--c-text-muted);
  font-style: italic;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── Results header ───────────────────────────────────────────────────────── */
.results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.results-header h2 { font-size: 1.25rem; font-weight: 600; }

/* ── Summary cards ────────────────────────────────────────────────────────── */
.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}
.summary-grid.no-ku { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 480px) { .summary-grid { grid-template-columns: 1fr 1fr; } }

.summary-card {
  border-radius: var(--radius);
  padding: 18px 16px;
  text-align: center;
}
.summary-card.available { background: var(--c-available-bg); }
.summary-card.waitlist  { background: var(--c-waitlist-bg); }
.summary-card.ku        { background: var(--c-ku-bg); }

.summary-count {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1;
}
.summary-card.available .summary-count { color: var(--c-available); }
.summary-card.waitlist  .summary-count { color: var(--c-waitlist); }
.summary-card.ku        .summary-count { color: var(--c-ku); }
.summary-label { font-size: 0.78rem; color: var(--c-text-muted); margin-top: 4px; }

/* ── Results table ────────────────────────────────────────────────────────── */
.table-wrap {
  border-radius: var(--radius);
  border: 1px solid var(--c-border);
  overflow-x: auto;
}
table { width: 100%; border-collapse: collapse; font-size: 0.875rem; }
thead th {
  background: #f9fafb;
  padding: 10px 14px;
  text-align: left;
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--c-text-muted);
  border-bottom: 1px solid var(--c-border);
  white-space: nowrap;
}
tbody tr {
  border-bottom: 1px solid var(--c-border);
  animation: rowIn 0.22s ease both;
}
tbody tr:last-child { border-bottom: none; }
tbody tr:hover { background: #f9fafb; }
@keyframes rowIn {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}
td { padding: 10px 14px; vertical-align: middle; }
.book-title  { font-weight: 500; }
.book-author { font-size: 0.8rem; color: var(--c-text-muted); }

/* ── Status badges ────────────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 9px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 500;
  white-space: nowrap;
  text-decoration: none;
}
.badge-available { background: var(--c-available-bg); color: var(--c-available); }
.badge-waitlist  { background: var(--c-waitlist-bg);  color: var(--c-waitlist); }
.badge-notfound  { background: var(--c-notfound-bg);  color: var(--c-notfound); }
.badge-error     { background: var(--c-error-bg);     color: var(--c-error); }
.badge-ku        { background: var(--c-ku-bg);        color: var(--c-ku); }
.badge-skipped   { font-size: 0.75rem; color: var(--c-text-muted); }

a.badge:hover { filter: brightness(0.92); }

/* ── Utility ──────────────────────────────────────────────────────────────── */
.hidden { display: none !important; }