/* ---- Reset & base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:           #ffffff;
  --surface:      #f7f7f5;
  --border:       #e4e4e0;
  --text:         #111111;
  --text-muted:   #888884;
  --pass:         #0a7c47;
  --pass-bg:      #edfaf3;
  --pass-border:  #b6e8cd;
  --fail:         #c8281e;
  --fail-bg:      #fff1f0;
  --fail-border:  #f5bcb9;
  --amber:        #b45309;
  --amber-bg:     #fffbeb;
  --accent:       #111111;
  --radius-sm:    6px;
  --radius:       10px;
  --shadow:       0 1px 4px rgba(0,0,0,.07), 0 0 0 1px rgba(0,0,0,.04);
  --font:         'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

html { font-size: 16px; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: inherit; }
a:hover { opacity: .75; }

/* ---- Layout ---- */
.container {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ---- Header ---- */
header {
  border-bottom: 1px solid var(--border);
  padding: 18px 0;
  position: sticky;
  top: 0;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 10;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

header h1 {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -.02em;
  line-height: 1.2;
}

header .tagline {
  font-size: .8rem;
  color: var(--text-muted);
  margin-top: 1px;
}

.kofi-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: .8rem;
  font-weight: 500;
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  text-decoration: none;
  white-space: nowrap;
  transition: background .15s, border-color .15s;
  color: var(--text);
}
.kofi-btn:hover { background: #fff0e0; border-color: #f5c187; opacity: 1; }

/* ---- Main ---- */
main { flex: 1; padding: 28px 0 48px; }

/* ---- Input card ---- */
.input-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 28px;
}

.presets {
  display: flex;
  gap: 6px;
  margin-bottom: 20px;
}

.preset-btn {
  font-size: .8rem;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: 99px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-muted);
  cursor: pointer;
  transition: all .15s;
}
.preset-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.preset-btn:hover:not(.active) { border-color: var(--text); color: var(--text); }

.dimension-inputs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 16px;
}

.dimension-inputs label {
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-size: .78rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: .01em;
  text-transform: uppercase;
}

.optional { font-weight: 400; text-transform: none; letter-spacing: 0; }

.input-wrap {
  display: flex;
  align-items: center;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  overflow: hidden;
  transition: border-color .15s;
}
.input-wrap:focus-within { border-color: var(--accent); }

.input-wrap input {
  flex: 1;
  border: none;
  outline: none;
  padding: 8px 10px;
  font-size: .95rem;
  font-family: inherit;
  color: var(--text);
  background: transparent;
  min-width: 0;
  -moz-appearance: textfield;
}
.input-wrap input::-webkit-outer-spin-button,
.input-wrap input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.input-wrap input::placeholder { color: var(--text-muted); }

.unit {
  padding: 0 10px;
  font-size: .78rem;
  font-weight: 500;
  color: var(--text-muted);
  border-left: 1px solid var(--border);
  background: var(--surface);
  height: 100%;
  display: flex;
  align-items: center;
  white-space: nowrap;
}

.options-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.class-toggle {
  display: flex;
  gap: 2px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 2px;
}

.class-btn {
  font-size: .8rem;
  font-weight: 500;
  padding: 5px 14px;
  border-radius: calc(var(--radius-sm) - 2px);
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all .15s;
}
.class-btn.active {
  background: var(--accent);
  color: #fff;
}
.class-btn:hover:not(.active) { color: var(--text); }

.unit-toggle {
  display: flex;
  gap: 2px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 2px;
}

.unit-btn {
  font-size: .8rem;
  font-weight: 500;
  padding: 5px 12px;
  border-radius: calc(var(--radius-sm) - 2px);
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all .15s;
}
.unit-btn.active  { background: var(--accent); color: #fff; }
.unit-btn:hover:not(.active) { color: var(--text); }

.copy-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: .8rem;
  font-weight: 500;
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  cursor: pointer;
  transition: all .15s;
}
.copy-link-btn:hover { border-color: var(--accent); }
.copy-link-btn.copied { background: var(--pass-bg); border-color: var(--pass-border); color: var(--pass); }

/* ---- Summary ---- */
.summary {
  margin-bottom: 16px;
}

.summary-text {
  font-size: .88rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.progress-bar {
  height: 4px;
  background: var(--border);
  border-radius: 99px;
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  border-radius: 99px;
  transition: width .4s ease, background-color .3s;
}
.bar-green { background: var(--pass); }
.bar-amber { background: #f59e0b; }
.bar-red   { background: var(--fail); }

/* ---- Results header ---- */
.results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.filter-tabs {
  display: flex;
  gap: 2px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 2px;
}

.filter-tab {
  font-size: .8rem;
  font-weight: 500;
  padding: 5px 14px;
  border-radius: calc(var(--radius-sm) - 2px);
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all .15s;
  display: flex;
  align-items: center;
  gap: 5px;
}
.filter-tab.active { background: var(--bg); color: var(--text); box-shadow: var(--shadow); }
.filter-tab:hover:not(.active) { color: var(--text); }

.count {
  font-size: .72rem;
  font-weight: 600;
  background: var(--border);
  border-radius: 99px;
  padding: 0 6px;
  min-width: 20px;
  text-align: center;
}
.filter-tab.active .count { background: var(--surface); }

.search-wrap input[type="search"] {
  font-size: .85rem;
  font-family: inherit;
  padding: 7px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--text);
  outline: none;
  width: 200px;
  transition: border-color .15s;
  -webkit-appearance: none;
}
.search-wrap input[type="search"]:focus { border-color: var(--accent); }
.search-wrap input[type="search"]::placeholder { color: var(--text-muted); }

/* ---- Table ---- */
.table-wrap {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: .875rem;
}

thead th {
  background: var(--surface);
  font-size: .72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--text-muted);
  padding: 10px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

tbody tr {
  border-bottom: 1px solid var(--border);
  transition: background .1s;
}
tbody tr:last-child { border-bottom: none; }
tbody tr:hover { background: var(--surface); }

tbody td {
  padding: 11px 16px;
  vertical-align: middle;
}

.col-airline { font-weight: 500; }
.col-dims    { font-variant-numeric: tabular-nums; color: var(--text-muted); font-size: .82rem; }
.col-weight  { font-variant-numeric: tabular-nums; font-size: .85rem; }
.col-status  { text-align: right; }

.muted { color: var(--text-muted); }

.weight-pass { color: var(--pass); }
.weight-fail { color: var(--fail); font-weight: 500; }

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: .78rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 99px;
  letter-spacing: .01em;
  white-space: nowrap;
}

.status-pass {
  background: var(--pass-bg);
  color: var(--pass);
  border: 1px solid var(--pass-border);
}

.status-fail {
  background: var(--fail-bg);
  color: var(--fail);
  border: 1px solid var(--fail-border);
}

.status-icon { font-size: .7rem; }

/* ---- Footer ---- */
footer {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  font-size: .78rem;
  color: var(--text-muted);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.disclaimer a {
  text-decoration: underline;
  text-underline-offset: 2px;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 16px;
}

.footer-links a {
  text-decoration: none;
  opacity: .7;
  transition: opacity .15s;
}
.footer-links a:hover { opacity: 1; }

/* ---- Responsive ---- */
@media (max-width: 680px) {
  .dimension-inputs { grid-template-columns: repeat(2, 1fr); }

  .input-card { padding: 16px; }

  .header-inner h1 { font-size: 1rem; }
  .kofi-btn span { display: none; }

  .results-header { flex-direction: column; align-items: flex-start; }
  .search-wrap input[type="search"] { width: 100%; }

  .footer-inner { flex-direction: column; align-items: flex-start; gap: 10px; }

  /* Prevent iOS auto-zoom on input focus (requires font-size >= 16px) */
  .input-wrap input,
  .search-wrap input[type="search"] { font-size: 16px; }

  /* Minimum 44px touch targets */
  .preset-btn  { min-height: 44px; padding: 10px 16px; }
  .class-btn,
  .unit-btn    { min-height: 40px; padding: 8px 16px; }
  .filter-tab  { min-height: 40px; padding: 8px 14px; }
  .copy-link-btn,
  .kofi-btn    { min-height: 44px; padding: 10px 16px; }
}

/* ---- Mobile card table (≤ 540px) ---- */
@media (max-width: 540px) {
  .table-wrap {
    border: none;
    border-radius: 0;
    margin: 0 -20px; /* bleed to screen edges */
  }

  table, tbody { display: block; }
  thead        { display: none; }

  tbody tr {
    display: grid;
    grid-template-columns: 1fr auto;
    grid-template-areas:
      "airline status"
      "dims    status"
      "weight  status";
    gap: 2px 12px;
    align-items: center;
    padding: 12px 20px;
    border-bottom: 1px solid var(--border);
    border-radius: 0;
    background: var(--bg);
  }
  tbody tr:last-child { border-bottom: 1px solid var(--border); }
  tbody tr:first-child { border-top: 1px solid var(--border); }
  tbody tr:hover { background: var(--surface); }

  tbody td { padding: 0; vertical-align: middle; }

  .col-airline {
    grid-area: airline;
    font-size: .9rem;
    font-weight: 600;
  }
  .col-dims {
    grid-area: dims;
    display: block;
    font-size: .82rem;   /* up from .78rem — more readable on mobile */
    color: var(--text-muted);
  }
  .col-weight {
    grid-area: weight;
    font-size: .82rem;
  }
  /* Show "Weight: " label only when there's an actual limit (not the — placeholder) */
  .col-weight:not(:has(.muted))::before {
    content: "Weight: ";
    color: var(--text-muted);
  }
  /* Hide the weight row entirely when N/A — keeps cards clean */
  .col-weight:has(.muted) {
    display: none;
  }
  .col-status {
    grid-area: status;
    text-align: right;
    display: flex;
    align-items: center;
    justify-content: flex-end;
  }
}

@media (max-width: 420px) {
  .options-row   { flex-direction: column; align-items: flex-start; }
  .class-toggle,
  .unit-toggle   { width: 100%; }
  .class-btn,
  .unit-btn      { flex: 1; justify-content: center; }
  .copy-link-btn { width: 100%; justify-content: center; }
}