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

:root {
  --navy:   #16213e;
  --blue:   #0f3460;
  --accent: #e94560;
  --bg:     #f0f4f8;
  --card:   #ffffff;
  --border: #dde3ee;
  --text:   #1a1a2e;
  --muted:  #6b7280;
  --green:  #16a34a;
  --gold:   #ca8a04;
  --radius: 8px;
  --shadow: 0 1px 6px rgba(0,0,0,.08);
}

body {
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

/* ── Layout ── */
header {
  background: var(--navy);
  color: #fff;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}
header h1 { font-size: 1.15rem; font-weight: 700; letter-spacing: -.01em; }
header span { color: #94a3b8; font-size: .85rem; }

main { max-width: 1280px; margin: 0 auto; padding: 2rem; }

.grid-2 {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 1.5rem;
  align-items: start;
}
/* Grid items default to min-width:auto which lets them blow past the grid track.
   Setting 0 lets overflow-x:auto on .table-wrap actually scroll instead of expand. */
.grid-2 > * { min-width: 0; }

/* ── Cards ── */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.card-header {
  padding: .85rem 1.2rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 600;
  font-size: .9rem;
}
.card-body { padding: 1.2rem; }

/* ── Form ── */
.form-group { margin-bottom: .9rem; }
label { display: block; font-size: .8rem; font-weight: 600; color: var(--muted); margin-bottom: .3rem; text-transform: uppercase; letter-spacing: .04em; }
input, select {
  width: 100%;
  padding: .5rem .7rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: .9rem;
  background: #fff;
  color: var(--text);
  transition: border-color .15s;
}
input:focus, select:focus { outline: none; border-color: var(--blue); }
input[type="number"] { font-variant-numeric: tabular-nums; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .55rem 1rem;
  border: none;
  border-radius: 6px;
  font-size: .875rem;
  font-weight: 600;
  cursor: pointer;
  transition: filter .15s, transform .1s;
}
.btn:active { transform: scale(.97); }
.btn:hover  { filter: brightness(1.08); }

.btn-primary  { background: var(--blue);   color: #fff; }
.btn-danger   { background: #dc2626;       color: #fff; }
.btn-ghost    { background: transparent;   color: var(--blue); border: 1px solid var(--blue); }
.btn-sm       { padding: .3rem .65rem; font-size: .8rem; }
.btn-full     { width: 100%; justify-content: center; }

/* ── Upload area ── */
.upload-area {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 1.2rem;
  text-align: center;
  cursor: pointer;
  color: var(--muted);
  font-size: .85rem;
  transition: border-color .2s, background .2s;
}
.upload-area:hover { border-color: var(--blue); background: #f8faff; }
.upload-area input { display: none; }

/* ── Results panel ── */
.results-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .75rem;
  padding: 4rem 2rem;
  color: var(--muted);
  font-size: .9rem;
  text-align: center;
}
.results-placeholder svg { opacity: .3; }

/* ── Rank bar ── */
.rank-bar {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .75rem 1.2rem;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.rank-bar label { font-size: .8rem; font-weight: 600; color: var(--muted); white-space: nowrap; margin: 0; }
.rank-bar select { width: auto; flex: 1; min-width: 160px; }

/* ── Rank description ── */
.rank-desc {
  padding: .5rem 1.2rem .6rem;
  font-size: .8rem;
  color: var(--muted);
  background: #f8faff;
  border-bottom: 1px solid var(--border);
  line-height: 1.5;
}

/* ── Group tabs (reuses .tab / .tabs styles, just removes bottom margin) ── */
.group-tabs { margin-bottom: 0; padding: 0 .4rem; }
.group-panel[hidden] { display: none; }

/* ── Table ── */
.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: .8rem; }
thead tr { background: var(--navy); color: #fff; }
th {
  padding: .5rem .55rem;
  text-align: right;
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .04em;
  white-space: nowrap;
}
th:first-child { text-align: left; }
td {
  padding: .45rem .55rem;
  text-align: right;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}
/* Allow the name cell to wrap so it never forces horizontal scroll on its own */
td:first-child {
  text-align: left;
  font-weight: 600;
  white-space: normal;
  min-width: 130px;
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover td { background: #f8faff; }
tbody tr.rank-best td { background: #fefce8; }
tbody tr.rank-best td:first-child::before {
  content: "★ ";
  color: var(--gold);
}

/* ── Badges ── */
.badge {
  display: inline-block;
  padding: .1rem .45rem;
  border-radius: 99px;
  font-size: .72rem;
  font-weight: 700;
  margin-left: .35rem;
  vertical-align: middle;
}
.badge-upfront { background: #dbeafe; color: #1e40af; }
.badge-added   { background: #fce7f3; color: #9d174d; }
.badge-io      { background: #dcfce7; color: #166534; }

/* ── Break-even section ── */
.breakeven-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: .75rem;
  padding: 1.2rem;
}
.be-card {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: .85rem 1rem;
  font-size: .82rem;
}
.be-card .be-pair { font-weight: 600; margin-bottom: .4rem; }
.be-card .be-month { font-size: 1.1rem; font-weight: 700; }
.be-month.good  { color: var(--green); }
.be-month.never { color: #dc2626; }

/* ── Tabs ── */
.tabs { display: flex; border-bottom: 2px solid var(--border); margin-bottom: 1.2rem; }
.tab {
  padding: .55rem 1rem;
  cursor: pointer;
  font-size: .85rem;
  font-weight: 600;
  color: var(--muted);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color .15s;
}
.tab.active { color: var(--blue); border-bottom-color: var(--blue); }

/* ── Toast ── */
#toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  background: var(--navy);
  color: #fff;
  padding: .75rem 1.25rem;
  border-radius: var(--radius);
  font-size: .875rem;
  box-shadow: 0 4px 20px rgba(0,0,0,.25);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity .2s, transform .2s;
  pointer-events: none;
  z-index: 100;
  max-width: 320px;
}
#toast.show { opacity: 1; transform: translateY(0); }
#toast.error { background: #dc2626; }

/* ── Product list (sidebar) ── */
.product-list { display: flex; flex-direction: column; gap: .5rem; margin-bottom: 1rem; }
.product-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .5rem .75rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: .83rem;
  background: #fafbff;
}
.product-item .product-name { font-weight: 600; }
.product-item .product-meta { color: var(--muted); font-size: .78rem; }

/* ── API docs link ── */
.api-link { font-size: .78rem; color: var(--muted); }
.api-link a { color: var(--blue); text-decoration: none; }
.api-link a:hover { text-decoration: underline; }

@media (max-width: 900px) {
  .grid-2 { grid-template-columns: 1fr; }
}