:root {
  color-scheme: light;
  --bg: #f4f7fb;
  --surface: #ffffff;
  --text: #1a2332;
  --text-muted: #5a677a;
  --border: #d8e0ec;
  --accent: #2f7a6b;
  --accent-soft: #e3f2ef;
  --accent-soft-border: #c5e3dc;
  --accent-soft-text: #1f4f46;
  --on-accent: #ffffff;
  --good: #1f7a4f;
  --good-bg: #e8f6ee;
  --good-border: #b9e4cb;
  --mild-good: #3d7a55;
  --mild-good-bg: #edf7f0;
  --mild-good-border: #c8e6d2;
  --neutral: #5c6578;
  --neutral-bg: #eef1f6;
  --neutral-border: #d5dbe6;
  --mild-bad: #9a6b2e;
  --mild-bad-bg: #faf3e8;
  --mild-bad-border: #ecdaba;
  --bad: #b0443a;
  --bad-bg: #fceeee;
  --bad-border: #f0c5c1;
  --shadow: 0 10px 30px rgba(26, 35, 50, 0.08);
  --bg-gradient-1: #dce9f8;
  --bg-gradient-2: #dff0ea;
  --input-bg: #fbfcfe;
  --focus-ring: rgba(47, 122, 107, 0.15);
  --placeholder-bg: #fafbfd;
  --metric-bg: #f8fafc;
  --factor-bg: #fcfdff;
  --radius: 16px;
  --radius-sm: 10px;
  --font: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #0f1419;
    --surface: #1a222d;
    --text: #e8edf4;
    --text-muted: #9aa8bb;
    --border: #2d3848;
    --accent: #4a9d8c;
    --accent-soft: #1a2e2b;
    --accent-soft-border: #2a4a44;
    --accent-soft-text: #a8ddd2;
    --on-accent: #ffffff;
    --good: #5cb884;
    --good-bg: #152720;
    --good-border: #2a4d3a;
    --mild-good: #6db98a;
    --mild-good-bg: #182a21;
    --mild-good-border: #2f4f3c;
    --neutral: #9aa8bb;
    --neutral-bg: #1e2530;
    --neutral-border: #3a4555;
    --mild-bad: #d4a853;
    --mild-bad-bg: #2a2318;
    --mild-bad-border: #4d4028;
    --bad: #e07a72;
    --bad-bg: #2a1a18;
    --bad-border: #5a3530;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
    --bg-gradient-1: #1a2840;
    --bg-gradient-2: #142820;
    --input-bg: #141b24;
    --focus-ring: rgba(74, 157, 140, 0.25);
    --placeholder-bg: #141a22;
    --metric-bg: #151c26;
    --factor-bg: #161d27;
  }
}

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

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(circle at top left, var(--bg-gradient-1) 0%, transparent 45%),
    radial-gradient(circle at bottom right, var(--bg-gradient-2) 0%, transparent 40%),
    var(--bg);
  line-height: 1.5;
}

.page {
  max-width: 1080px;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

@media (min-width: 1100px) {
  .page {
    max-width: min(1680px, calc(100vw - 2.5rem));
  }
}

.header {
  text-align: center;
  margin-bottom: 2rem;
}

.header__icon {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.header h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.75rem, 4vw, 2.35rem);
  letter-spacing: -0.02em;
}

.header__subtitle {
  margin: 0 auto;
  max-width: 42rem;
  color: var(--text-muted);
  font-size: 1.05rem;
}

.layout {
  display: grid;
  gap: 1.25rem;
  align-content: start;
  align-items: start;
}

@media (min-width: 1100px) {
  .layout {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1fr) minmax(0, 1.1fr);
  }
}

.layout > .panel {
  min-width: 0;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
}

.panel__intro {
  margin: -0.65rem 0 1.15rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.45;
}

.panel h2 {
  margin: 0 0 1.25rem;
  font-size: 1.15rem;
}

.panel h3 {
  margin: 0 0 0.75rem;
  font-size: 0.95rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.unit-toggle {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.2rem;
  margin-top: 1.25rem;
  margin-bottom: 1.25rem;
}

.unit-toggle__option {
  cursor: pointer;
}

.unit-toggle__option input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.unit-toggle__option span {
  display: block;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
}

.unit-toggle__option input:checked + span {
  background: var(--accent);
  color: var(--on-accent);
}

.input-grid {
  display: grid;
  gap: 1rem;
}

@media (min-width: 560px) {
  .input-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.input-group {
  display: grid;
  gap: 0.45rem;
}

.input-group--full {
  margin-top: 1rem;
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
}

.checkbox-row input[type="checkbox"] {
  width: 1rem;
  height: 1rem;
  margin: 0;
  accent-color: var(--accent);
}

.wind-speed-field:not([hidden]) {
  display: grid;
  gap: 0.45rem;
  margin-top: 0.65rem;
  padding-left: 1.55rem;
}

.field-grid {
  display: grid;
  gap: 0.85rem;
}

.field-grid + .field-grid {
  margin-top: 1rem;
}

@media (min-width: 560px) {
  .field-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.field-grid__full {
  grid-column: 1 / -1;
}

.ventilation-settings h3 {
  margin: 0 0 0.85rem;
}

.sunlight-inputs__row {
  display: grid;
  gap: 0.75rem;
}

.sunlight-inputs__row--datetime {
  grid-template-columns: 1fr 1fr;
}

@media (max-width: 520px) {
  .sunlight-inputs__row--datetime {
    grid-template-columns: 1fr;
  }
}

input[type="date"],
input[type="time"] {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font: inherit;
  color: var(--text);
  background: var(--input-bg);
  transition: border-color 0.15s, box-shadow 0.15s;
}

input[type="date"]:focus-visible,
input[type="time"]:focus-visible {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-ring);
}

label {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text);
}

.unit-label {
  font-weight: 500;
  color: var(--text-muted);
}

input[type="number"],
select {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font: inherit;
  color: var(--text);
  background: var(--input-bg);
  transition: border-color 0.15s, box-shadow 0.15s;
}

input[type="number"]:focus,
select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--focus-ring);
}

.hint {
  margin: 0.35rem 0 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.comfort-range {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.comfort-range__header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
}

.comfort-range__header > label {
  margin: 0;
}

#comfort-range-display {
  font-weight: 700;
  color: var(--accent);
  font-size: 1rem;
}

.comfort-range__slider {
  display: grid;
  grid-template-columns: 6.5rem 1fr;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.65rem;
}

.comfort-range__slider label {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.comfort-range input[type="range"] {
  width: 100%;
  height: 0.45rem;
  margin: 0;
  accent-color: var(--accent);
  cursor: pointer;
}

.ventilation-note {
  margin-top: 0.75rem;
}

.btn-primary {
  width: 100%;
  margin-top: 0.5rem;
  padding: 0.85rem 1rem;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: var(--on-accent);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.12s, filter 0.12s;
}

.btn-primary:hover {
  filter: brightness(1.05);
}

.btn-primary:active {
  transform: translateY(1px);
}

.validation-error {
  margin: 0.75rem 0 0;
  color: var(--bad);
  font-size: 0.9rem;
}

.results-placeholder {
  padding: 2rem 1rem;
  text-align: center;
  color: var(--text-muted);
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  background: var(--placeholder-bg);
}

.verdict {
  padding: 1.25rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1.25rem;
}

.verdict--strong-good {
  background: var(--good-bg);
  border: 1px solid var(--good-border);
}

.verdict--good {
  background: var(--mild-good-bg);
  border: 1px solid var(--mild-good-border);
}

.verdict--neutral {
  background: var(--neutral-bg);
  border: 1px solid var(--neutral-border);
}

.verdict--mild-bad {
  background: var(--mild-bad-bg);
  border: 1px solid var(--mild-bad-border);
}

.verdict--bad {
  background: var(--bad-bg);
  border: 1px solid var(--bad-border);
}

.verdict__badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
  opacity: 0.85;
}

.verdict__headline {
  margin: 0 0 0.5rem;
  font-size: 1.35rem;
  line-height: 1.25;
}

.verdict__summary {
  margin: 0;
  color: var(--text-muted);
}

.cooling-outlook,
.outlook {
  margin: 0 0 1.25rem;
  padding: 1rem 1.1rem;
  border-radius: var(--radius-sm);
  background: var(--metric-bg);
  border: 1px solid var(--border);
}

.cooling-outlook__title,
.cooling-outlook__text,
.outlook__title,
.outlook__text {
  margin: 0;
}

.cooling-outlook__title,
.outlook__title {
  margin: 0 0 0.45rem;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

.cooling-outlook__text,
.outlook__text {
  font-size: 0.95rem;
  line-height: 1.45;
  color: var(--text);
}

.metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

@media (min-width: 560px) {
  .metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .panel--results .metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1400px) {
  .panel--results .metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.metric {
  padding: 0.75rem;
  border-radius: var(--radius-sm);
  background: var(--metric-bg);
  border: 1px solid var(--border);
  min-width: 0;
}

.metric__label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.metric__value {
  font-weight: 700;
  font-size: 1rem;
  overflow-wrap: anywhere;
}

.factors {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}

.factor {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.75rem;
  align-items: start;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--factor-bg);
}

.factor__icon {
  font-size: 1.15rem;
  line-height: 1.4;
}

.factor__title {
  margin: 0 0 0.2rem;
  font-size: 0.95rem;
  font-weight: 700;
}

.factor__body {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.factor--help .factor__title {
  color: var(--good);
}

.factor--hurt .factor__title {
  color: var(--bad);
}

.factor--mixed .factor__title {
  color: var(--mild-bad);
}

.factor--neutral .factor__title {
  color: var(--neutral);
}

.footer {
  margin-top: 2rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}