/* Design tokens */
:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --surface-alt: #f0f2f5;
  --border: #e2e5ea;
  --border-strong: #cbd2da;
  --text: #1b2430;
  --text-muted: #66707e;
  --primary: #2155d6;
  --primary-strong: #1842a6;
  --primary-soft: #e7eefc;
  --success: #1a7f4b;
  --success-soft: #e2f3ea;
  --danger: #c23b3b;
  --danger-soft: #fbe7e7;
  --warn: #a8620a;
  --warn-soft: #fbeede;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 1px 2px rgb(27 36 48 / 0.06), 0 2px 8px rgb(27 36 48 / 0.06);
  --gap: 1rem;
  --gap-lg: 1.5rem;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
}

.container { width: min(1100px, 92%); margin-inline: auto; }
.main { padding-block: var(--gap-lg); }

h1 { font-size: 1.4rem; margin: 0 0 var(--gap); }
h2 { font-size: 1.1rem; margin: 0 0 0.75rem; }
h3 { font-size: 1rem; margin: 0 0 0.5rem; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
.muted { color: var(--text-muted); }
.small { font-size: 0.85rem; }

/* Top bar */
.topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
}
.topbar-inner { display: flex; align-items: center; gap: var(--gap-lg); padding-block: 0.6rem; }
.brand { font-weight: 700; color: var(--text); }
.nav { display: flex; gap: var(--gap); flex: 1; flex-wrap: wrap; }
.nav a { color: var(--text-muted); }
.nav a:hover { color: var(--text); }
.topbar-user { display: flex; align-items: center; gap: 0.6rem; }
.inline { display: inline; margin: 0; }

/* Cards & grid */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--gap);
  box-shadow: var(--shadow);
}
.grid { display: grid; gap: var(--gap); }
.grid-cards { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.two-col { display: grid; gap: var(--gap); grid-template-columns: 1fr; }
@media (min-width: 760px) { .two-col { grid-template-columns: 1fr 1fr; } }

.card-img {
  width: 100%; aspect-ratio: 4/3; object-fit: cover;
  border-radius: var(--radius-sm); background: var(--surface-alt);
  border: 1px solid var(--border);
}

/* Buttons */
.btn {
  display: inline-block; padding: 0.5rem 0.9rem; border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong); background: var(--surface); color: var(--text);
  font: inherit; cursor: pointer; text-decoration: none; line-height: 1.2;
}
.btn:hover { background: var(--surface-alt); text-decoration: none; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-strong); }
.btn-danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn-ghost { border-color: transparent; background: transparent; color: var(--text-muted); }
.btn-sm { padding: 0.25rem 0.5rem; font-size: 0.85rem; }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }

/* Forms */
.form { display: grid; gap: var(--gap); }
.field { display: grid; gap: 0.3rem; }
.field > span { font-size: 0.85rem; color: var(--text-muted); }
.field input, .field select, .field textarea {
  padding: 0.5rem 0.6rem; border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm); font: inherit; background: var(--surface); color: var(--text);
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: 2px solid var(--primary-soft); border-color: var(--primary);
}
.form-row { display: grid; gap: var(--gap); grid-template-columns: 1fr; }
@media (min-width: 640px) { .form-row.two { grid-template-columns: 1fr 1fr; } }

/* Badges */
.badge {
  display: inline-flex; align-items: center; gap: 0.3rem;
  padding: 0.15rem 0.5rem; border-radius: 999px; font-size: 0.75rem; font-weight: 600;
  background: var(--surface-alt); color: var(--text-muted); border: 1px solid var(--border);
}
.badge-pro { background: var(--success-soft); color: var(--success); border-color: transparent; }
.badge-con { background: var(--danger-soft); color: var(--danger); border-color: transparent; }
.badge-warn { background: var(--warn-soft); color: var(--warn); border-color: transparent; }
.badge-price { background: var(--primary-soft); color: var(--primary-strong); border-color: transparent; }
.badge-archived { background: var(--surface-alt); color: var(--text-muted); }

/* Alerts */
.alert { padding: 0.6rem 0.8rem; border-radius: var(--radius-sm); margin: 0 0 var(--gap); }
.alert-error { background: var(--danger-soft); color: var(--danger); }
.alert-info { background: var(--primary-soft); color: var(--primary-strong); }

/* Auth */
.auth-card { max-width: 380px; margin: 10vh auto; }
.auth-title { text-align: center; }

/* Ranking */
.rank-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.5rem; }
.rank-item {
  display: flex; align-items: center; gap: 0.75rem;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 0.6rem 0.8rem;
}
.rank-item.dragging { opacity: 0.5; }
.rank-item.drag-over { border-color: var(--primary); }
.rank-pos { font-weight: 700; width: 2rem; text-align: center; color: var(--text-muted); }
.rank-handle { cursor: grab; color: var(--border-strong); user-select: none; }
.rank-body { flex: 1; min-width: 0; }
.rank-price { font-variant-numeric: tabular-nums; }

/* Leaderboard extras */
.rank-thumb {
  width: 72px; height: 54px; object-fit: cover; flex-shrink: 0;
  border-radius: var(--radius-sm); background: var(--surface-alt);
  border: 1px solid var(--border);
}
.rank-reason { font-size: 0.8rem; color: var(--text-muted); }
.badge-discuss { background: var(--warn-soft); color: var(--warn); border-color: transparent; }

/* Timeline */
.timeline { list-style: none; margin: 0; padding: 0; border-left: 2px solid var(--border); }
.timeline > li { position: relative; padding: 0 0 var(--gap) var(--gap); }
.timeline > li::before {
  content: ""; position: absolute; left: -6px; top: 4px; width: 10px; height: 10px;
  border-radius: 50%; background: var(--border-strong);
}
.timeline .change-neg { color: var(--success); }
.timeline .change-pos { color: var(--danger); }

/* Pros & cons */
.pc-cols { display: grid; gap: var(--gap); grid-template-columns: 1fr; }
@media (min-width: 760px) { .pc-cols { grid-template-columns: 1fr 1fr; } }
.note { border-left: 3px solid var(--border-strong); padding: 0.4rem 0.6rem; margin-bottom: 0.5rem; background: var(--surface-alt); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.note.pro { border-left-color: var(--success); }
.note.con { border-left-color: var(--danger); }
.note.neutral { border-left-color: var(--border-strong); }

/* Utility */
.row { display: flex; gap: 0.5rem; align-items: center; flex-wrap: wrap; }
.between { justify-content: space-between; }
.spacer { flex: 1; }
.toolbar { display: flex; gap: var(--gap); align-items: center; justify-content: space-between; flex-wrap: wrap; margin-bottom: var(--gap); }
.filters { display: flex; gap: 0.5rem; flex-wrap: wrap; align-items: end; }
.empty { text-align: center; padding: var(--gap-lg); color: var(--text-muted); }
.price-trend { font-variant-numeric: tabular-nums; }