:root {
  color-scheme: light;
  --ink: #1c2130;
  --muted: #6b7280;
  --border: #e2e5ea;
  --bg: #f4f6f9;
  --card: #ffffff;
  --accent: #2f6f4f;
  --accent-dark: #235a3f;
  --accent-soft: #e7f2ec;
  --warn: #8a6d1f;
  --warn-soft: #fbf1d8;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.04), 0 8px 24px rgba(16, 24, 40, 0.06);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(1200px 480px at 50% -120px, #e3f0e8 0%, transparent 65%),
    var(--bg);
}

header {
  position: relative;
  padding: 3rem 1.5rem 1.5rem;
}

.account-status[hidden] { display: none; }
.account-status {
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.82rem;
  color: var(--muted);
}
.link-btn {
  background: none;
  border: none;
  padding: 0;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: underline;
}
.link-btn:hover { color: var(--accent-dark); }

.header-inner {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
}

.eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  margin-bottom: 0.9rem;
}

h1 {
  margin: 0 0 0.5rem;
  font-size: 2rem;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.subtitle {
  margin: 0 auto;
  max-width: 520px;
  color: var(--muted);
  font-size: 1.02rem;
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
}

#filters {
  display: flex;
  flex-direction: column;
  gap: 1.4rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.75rem;
  box-shadow: var(--shadow);
}

.filter-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
}

.field { display: flex; flex-direction: column; gap: 0.5rem; }
.field label {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--ink);
}
.hint { font-weight: 400; color: var(--muted); margin-left: 0.35rem; }

select, input[type="search"] {
  padding: 0.6rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.95rem;
  background: #fbfcfd;
  color: var(--ink);
  font-family: inherit;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

select:hover, input[type="search"]:hover { border-color: #c3c9d2; }
select:focus, input[type="search"]:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
select:disabled, input[type="search"]:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  background: var(--bg);
}

.chip-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.chip {
  padding: 0.45rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #fbfcfd;
  color: var(--ink);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
}

.chip:hover { border-color: var(--accent); }

.chip.selected {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
  font-weight: 600;
}

.chip:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.filter-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: 0.6rem;
  border-top: 1px solid var(--border);
}

.checkbox-field {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--ink);
  cursor: pointer;
}

.checkbox-field input { width: 16px; height: 16px; accent-color: var(--accent); cursor: pointer; }

.filter-actions { display: flex; gap: 0.6rem; }

.btn-primary, .btn-secondary {
  padding: 0.65rem 1.2rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background 0.15s ease, transform 0.05s ease;
}

.btn-primary {
  background: var(--accent);
  color: white;
}
.btn-primary:hover { background: var(--accent-dark); }
.btn-primary:active { transform: translateY(1px); }
.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  background: transparent;
  color: var(--muted);
  border-color: var(--border);
}
.btn-secondary:hover { color: var(--ink); border-color: #c3c9d2; }

.results-header {
  margin: 1.5rem 0 0.75rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

#status {
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 500;
}

.sort-field {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.sort-field label {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--ink);
  white-space: nowrap;
}
.sort-field select {
  padding: 0.4rem 0.6rem;
  font-size: 0.88rem;
}

#results {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.prompt {
  text-align: center;
  padding: 2.5rem 1.5rem;
  color: var(--muted);
  border: 1px dashed var(--border);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.5);
}
.prompt-icon { font-size: 1.8rem; margin-bottom: 0.5rem; }
.prompt strong { color: var(--ink); display: block; margin-bottom: 0.25rem; font-size: 1rem; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.1rem 1.3rem;
  box-shadow: var(--shadow);
  animation: fade-in 0.2s ease;
}

@keyframes fade-in {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  flex-wrap: wrap;
}

.card-header a, .card-header span.title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--accent-dark);
  text-decoration: none;
}
.card-header a:hover { text-decoration: underline; }

.header-right { display: flex; align-items: center; gap: 0.75rem; }

.track-checkbox {
  width: 22px;
  height: 22px;
  accent-color: var(--accent);
  cursor: pointer;
  flex-shrink: 0;
}

.rank {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.6rem;
  height: 1.6rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-size: 0.75rem;
  font-weight: 700;
  margin-right: 0.5rem;
}

.organizer { color: var(--muted); font-size: 0.88rem; margin-top: 0.1rem; }

.badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  white-space: nowrap;
}
.badge.uncertain { background: var(--warn-soft); color: var(--warn); }

.meta {
  margin-top: 0.6rem;
  color: var(--muted);
  font-size: 0.84rem;
  display: flex;
  gap: 0.9rem;
  flex-wrap: wrap;
}

.description { margin-top: 0.55rem; font-size: 0.92rem; line-height: 1.45; }

.edition-info {
  margin-top: 0.6rem;
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  flex-wrap: wrap;
  font-size: 0.84rem;
  color: var(--ink);
  font-weight: 600;
}
.edition-note {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--warn);
  background: var(--warn-soft);
  padding: 0.1rem 0.5rem;
  border-radius: 999px;
  white-space: nowrap;
}

.tags { margin-top: 0.6rem; display: flex; gap: 0.35rem; flex-wrap: wrap; }
.tag {
  font-size: 0.72rem;
  background: #eef0f3;
  border-radius: 999px;
  padding: 0.15rem 0.55rem;
  color: var(--ink);
}

.empty {
  text-align: center;
  padding: 2rem;
  color: var(--muted);
}

.tracker-bar[hidden], .modal-overlay[hidden] { display: none; }

.tracker-bar {
  position: fixed;
  bottom: 1.25rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--ink);
  color: white;
  padding: 0.75rem 1.1rem;
  border-radius: 999px;
  box-shadow: 0 8px 24px rgba(16, 24, 40, 0.25);
  z-index: 20;
}
.tracker-bar #tracker-count { font-size: 0.88rem; font-weight: 600; white-space: nowrap; }
.tracker-bar .btn-secondary { background: transparent; color: white; border-color: rgba(255,255,255,0.3); }
.tracker-bar .btn-secondary:hover { color: white; border-color: rgba(255,255,255,0.6); }

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(16, 24, 40, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 30;
  padding: 1rem;
}
.modal {
  position: relative;
  background: var(--card);
  border-radius: 16px;
  padding: 1.75rem;
  max-width: 380px;
  width: 100%;
  box-shadow: var(--shadow);
}
.modal-close {
  position: absolute;
  top: 0.75rem;
  right: 0.9rem;
  background: none;
  border: none;
  font-size: 1.4rem;
  line-height: 1;
  color: var(--muted);
  cursor: pointer;
}
.modal-tabs { display: flex; gap: 0.5rem; margin-bottom: 1rem; }
.modal-tab {
  flex: 1;
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fbfcfd;
  font-weight: 600;
  font-size: 0.88rem;
  cursor: pointer;
  color: var(--muted);
}
.modal-tab.selected { background: var(--accent); border-color: var(--accent); color: white; }
.modal-hint { font-size: 0.84rem; color: var(--muted); margin: 0 0 1rem; line-height: 1.4; }
#auth-form { display: flex; flex-direction: column; gap: 0.9rem; }
#auth-form input {
  width: 100%;
  padding: 0.6rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.95rem;
}
.auth-error {
  margin: 0;
  font-size: 0.82rem;
  color: #b42318;
  background: #fef3f2;
  padding: 0.5rem 0.7rem;
  border-radius: 8px;
}

@media (max-width: 480px) {
  header { padding: 1.75rem 1rem 1.25rem; }
  h1 { font-size: 1.5rem; }
  .subtitle { font-size: 0.92rem; }

  /* Account status overlaps the centered title if left absolutely
     positioned at this width, so it becomes its own row above it instead. */
  .account-status {
    position: static;
    justify-content: center;
    margin-bottom: 0.85rem;
    flex-wrap: wrap;
  }

  main { padding: 0 1rem 6rem; }
  #filters { padding: 1.25rem; }
  .card { padding: 1rem; }

  /* Subject "word cloud": bigger chips, more breathing room between them,
     so thumbs don't misfire between adjacent subjects. */
  .chip-group { gap: 0.6rem; }
  .chip {
    padding: 0.6rem 1rem;
    font-size: 0.9rem;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }

  .track-checkbox { width: 26px; height: 26px; }

  /* A floating pill is easy to miss/mis-tap on a phone; a full-width bar
     anchored to the bottom is a more standard, thumb-friendly mobile pattern. */
  .tracker-bar {
    left: 0;
    right: 0;
    bottom: 0;
    transform: none;
    width: 100%;
    border-radius: 0;
    justify-content: space-between;
    padding: 0.85rem 1rem;
    gap: 0.6rem;
  }
  .tracker-bar #tracker-count { font-size: 0.82rem; }
  .tracker-bar .btn-primary, .tracker-bar .btn-secondary {
    padding: 0.55rem 0.9rem;
    font-size: 0.85rem;
  }

  .modal { padding: 1.25rem; }
}