:root {
  --text: #1d1d1f;
  --text-2: #6e6e73;
  --text-3: #86868b;
  --card: #f5f5f7;
  --hairline: #d2d2d7;
  --hairline-soft: #e8e8ed;
  --blue: #0071e3;
  --blue-hover: #0077ed;
  --green: #248a3d;
  --orange: #b25000;
  --red: #d70015;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: #fff;
  color: var(--text);
  font: 17px/1.5 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue",
    Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: 780px;
  margin: 0 auto;
  padding: 88px 22px 96px;
}

/* ---------------------------------------------------------------- header */

header { text-align: center; margin-bottom: 72px; }

.crest {
  font-size: 44px;
  line-height: 1;
  margin-bottom: 18px;
}

h1 {
  font-size: clamp(40px, 7vw, 56px);
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.07;
  margin: 0 0 14px;
}

.tagline {
  color: var(--text-2);
  font-size: 21px;
  line-height: 1.4;
  letter-spacing: 0.01em;
  max-width: 480px;
  margin: 0 auto;
}

footer {
  text-align: center;
  color: var(--text-3);
  font-size: 12px;
  margin-top: 72px;
}

/* ----------------------------------------------------------------- cards */

.card {
  background: var(--card);
  border-radius: 18px;
  padding: 36px 40px;
  margin-bottom: 20px;
  animation: appear 0.5s cubic-bezier(0.25, 0.1, 0.25, 1);
}

@keyframes appear {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: none; }
}

.hidden { display: none !important; }

/* ------------------------------------------------------ segmented control */

.seg-control {
  display: flex;
  justify-content: center;
  gap: 2px;
  background: var(--hairline-soft);
  border-radius: 980px;
  padding: 3px;
  width: fit-content;
  margin: 0 auto 28px;
}
.seg {
  background: transparent;
  border-radius: 980px;
  padding: 7px 20px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-2);
}
.seg.selected {
  background: #fff;
  color: var(--text);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.12);
}

h2 {
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 4px;
}

.hint {
  color: var(--text-2);
  font-size: 14px;
  line-height: 1.5;
  margin: 4px 0 0;
}
.hint.centered { text-align: center; }

.error {
  background: #fff2f4;
  color: var(--red);
  border-radius: 14px;
  padding: 14px 20px;
  font-size: 15px;
  margin-bottom: 20px;
  animation: appear 0.3s ease;
}

/* ---------------------------------------------------------------- inputs */

textarea {
  display: block;
  width: 100%;
  height: 180px;
  resize: vertical;
  margin-top: 18px;
  background: #fff;
  color: var(--text);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 14px 16px;
  font: 13px/1.55 ui-monospace, "SF Mono", SFMono-Regular, Menlo, monospace;
  transition: border-color 0.15s, box-shadow 0.15s;
}
textarea::placeholder { color: var(--text-3); }
textarea:focus, select:focus, input[type="number"]:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.15);
}

.row {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-top: 22px;
  flex-wrap: wrap;
}
.row.spread { justify-content: space-between; }

button {
  font: inherit;
  border: none;
  cursor: pointer;
  transition: background 0.15s, opacity 0.15s;
}

button.primary {
  background: var(--blue);
  color: #fff;
  border-radius: 980px;
  padding: 11px 24px;
  font-size: 16px;
}
button.primary:hover:not(:disabled) { background: var(--blue-hover); }
button.primary:disabled { opacity: 0.4; cursor: default; }

.link-btn {
  display: inline;
  background: none;
  padding: 0;
  color: var(--blue);
  font-size: 16px;
}
.link-btn::after { content: " ›"; }
.link-btn:hover { text-decoration: underline; }

.file-label { cursor: pointer; }
.file-label input { display: none; }

.controls {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  margin-top: 22px;
}
.controls label {
  display: flex;
  flex-direction: column;
  gap: 7px;
  font-size: 13px;
  color: var(--text-2);
}
select, input[type="number"] {
  font: inherit;
  font-size: 15px;
  background: #fff;
  color: var(--text);
  border: 1px solid var(--hairline);
  border-radius: 10px;
  padding: 9px 12px;
  min-width: 200px;
  transition: border-color 0.15s, box-shadow 0.15s;
  appearance: none;
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%236e6e73' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
}
input[type="number"] { min-width: 110px; background-image: none; }

/* -------------------------------------------------------------- progress */

.progress-track {
  height: 6px;
  background: var(--hairline-soft);
  border-radius: 3px;
  overflow: hidden;
  margin: 16px 0 4px;
}
#progress-fill {
  height: 100%;
  width: 0;
  background: var(--blue);
  border-radius: 3px;
  transition: width 0.25s ease;
}

/* --------------------------------------------------------------- results */

.results {
  padding: 56px 0 8px;
  animation: appear 0.5s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.verdict { text-align: center; }

.eyebrow {
  color: var(--blue);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 4px;
}
.eyebrow:empty { display: none; }

#rating-value {
  font-size: clamp(72px, 14vw, 112px);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.05;
  font-variant-numeric: tabular-nums;
}

.subject {
  font-size: 21px;
  font-weight: 600;
  margin-top: 10px;
}

.range {
  color: var(--text-2);
  font-size: 16px;
  margin-top: 2px;
}

/* meter */

.meter {
  max-width: 520px;
  margin: 40px auto 48px;
}
.meter-track {
  position: relative;
  height: 4px;
  border-radius: 2px;
  background: var(--hairline-soft);
}
#meter-band {
  position: absolute;
  top: 0;
  bottom: 0;
  border-radius: 2px;
  background: rgba(0, 113, 227, 0.25);
  transition: left 0.6s cubic-bezier(0.25, 0.1, 0.25, 1), width 0.6s cubic-bezier(0.25, 0.1, 0.25, 1);
}
#meter-marker {
  position: absolute;
  top: 50%;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--blue);
  border: 3px solid #fff;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.25);
  transform: translate(-50%, -50%);
  transition: left 0.6s cubic-bezier(0.25, 0.1, 0.25, 1);
}
.meter-labels {
  display: flex;
  justify-content: space-between;
  margin-top: 12px;
  color: var(--text-3);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

/* stats */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 0;
  border-top: 1px solid var(--hairline-soft);
  border-bottom: 1px solid var(--hairline-soft);
  padding: 28px 0;
  margin: 40px 0;
}
.stat { text-align: center; padding: 0 8px; }
.stat + .stat { border-left: 1px solid var(--hairline-soft); }
.stat-value {
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}
.stat-label {
  color: var(--text-2);
  font-size: 12px;
  margin-top: 4px;
}

/* table */

.table-wrap { overflow-x: auto; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}
th, td {
  text-align: left;
  padding: 11px 14px;
  white-space: nowrap;
}
thead th {
  color: var(--text-2);
  font-weight: 500;
  font-size: 12px;
  border-bottom: 1px solid var(--hairline);
}
tbody tr { border-bottom: 1px solid var(--hairline-soft); }
tbody tr:last-child { border-bottom: none; }
td:nth-child(3) { white-space: normal; }

.badge { font-weight: 500; }
.badge.good { color: var(--green); }
.badge.ok { color: var(--orange); }
.badge.warn { color: var(--orange); }
.badge.bad { color: var(--red); }
.badge.neutral { font-weight: 600; }

.disclaimer {
  max-width: 560px;
  margin: 36px auto 0;
  text-align: center;
  color: var(--text-3);
}

.loaded-note:empty { display: none; }
.loaded-note { margin-top: 14px; font-weight: 500; color: var(--text); }

.hint.emphasis {
  font-size: 16px;
  color: var(--text);
  max-width: 480px;
  margin: 24px auto 0;
}

/* --------------------------------------------------------------- compare */

.compare-verdicts {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 34px;
  flex-wrap: wrap;
  text-align: center;
}
.cv { min-width: 200px; }
.cv-tag {
  color: var(--text-3);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.cmp-value {
  font-size: clamp(48px, 9vw, 72px);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.05;
  font-variant-numeric: tabular-nums;
}

.delta {
  font-size: 28px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--text-2);
  padding: 6px 18px;
  border-radius: 980px;
  background: var(--card);
}
.delta.up { color: var(--green); background: #eaf7ee; }
.delta.down { color: var(--red); background: #fff2f4; }
.delta.up::before { content: "▲ "; font-size: 0.7em; }
.delta.down::before { content: "▼ "; font-size: 0.7em; }

.cmp-marker {
  position: absolute;
  top: 50%;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 3px solid #fff;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.25);
  transform: translate(-50%, -50%);
  transition: left 0.6s cubic-bezier(0.25, 0.1, 0.25, 1);
}
.cmp-marker.a { background: #86868b; }
.cmp-marker.b { background: var(--blue); }

.meter-legend {
  display: flex;
  justify-content: center;
  gap: 22px;
  margin-top: 10px;
  color: var(--text-2);
  font-size: 12px;
}
.meter-legend .dot {
  display: inline-block;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  margin-right: 6px;
}
.meter-legend .dot.a { background: #86868b; }
.meter-legend .dot.b { background: var(--blue); }

.cmp-table { margin: 8px 0; }
.cmp-table tbody th {
  color: var(--text-2);
  font-weight: 500;
  font-size: 14px;
  text-align: left;
  padding: 11px 14px;
  border-bottom: 1px solid var(--hairline-soft);
  white-space: nowrap;
}
.cmp-table td { font-variant-numeric: tabular-nums; }

details {
  margin: 18px 0;
  border-top: 1px solid var(--hairline-soft);
  padding-top: 14px;
}
details summary {
  cursor: pointer;
  color: var(--blue);
  font-size: 15px;
  list-style: none;
}
details summary::-webkit-details-marker { display: none; }
details summary::after { content: " ›"; }
details[open] summary::after { content: " ⌄"; }
details .table-wrap { margin-top: 12px; }

@media (max-width: 560px) {
  main { padding-top: 56px; }
  .card { padding: 26px 22px; }
  header { margin-bottom: 48px; }
  .tagline { font-size: 18px; }
}