@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700;800&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
  --calc-surface:   rgba(11, 24, 41, 0.94);
  --calc-surface-2: rgba(8, 18, 33, 0.98);
  --calc-ink:       #e1edff;
  --calc-muted:     #7d95b5;
  --calc-line:      rgba(255, 255, 255, 0.08);
  --calc-accent:    #69c3ff;
  --calc-accent-bg: rgba(105, 195, 255, 0.08);
  --calc-green:     #4ade80;
  --calc-shadow:    0 14px 34px rgba(0, 0, 0, 0.32);
  --calc-radius:    20px;
  --calc-radius-sm: 12px;
}

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

.calc-page {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  color: var(--calc-ink);
  line-height: 1.6;
}

/* ── Hero ─────────────────────────────────────────────────────────────────── */
.calc-hero {
  max-width: 700px;
  margin: 0 auto;
  padding: clamp(60px, 10vw, 96px) 24px clamp(32px, 5vw, 52px);
  text-align: center;
}

.calc-hero__eyebrow {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--calc-accent);
  text-transform: uppercase;
  margin-bottom: 16px;
}

.calc-hero h1 {
  font-size: clamp(30px, 5.5vw, 50px);
  font-weight: 800;
  color: #fff;
  line-height: 1.1;
  margin-bottom: 18px;
}

.calc-hero__lead {
  font-size: 16px;
  color: var(--calc-muted);
  max-width: 520px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ── Calculator form ──────────────────────────────────────────────────────── */
.calc-form-wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 24px 60px;
}

.calc-form {
  background: var(--calc-surface);
  border: 1px solid var(--calc-line);
  border-radius: var(--calc-radius);
  padding: 36px 40px;
  box-shadow: var(--calc-shadow);
}

.calc-form__row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 16px;
  align-items: end;
  margin-bottom: 24px;
}

.calc-form__field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.calc-form__label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--calc-muted);
}

.calc-form__select {
  background: var(--calc-surface-2);
  border: 1.5px solid var(--calc-line);
  border-radius: 10px;
  padding: 12px 16px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 15px;
  color: var(--calc-ink);
  outline: none;
  cursor: pointer;
  transition: border-color .2s;
  width: 100%;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%237d95b5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 40px;
}

.calc-form__select:focus { border-color: var(--calc-accent); }

.calc-form__swap {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--calc-surface-2);
  border: 1.5px solid var(--calc-line);
  cursor: pointer;
  color: var(--calc-muted);
  align-self: center;
  transition: border-color .2s, color .2s;
  margin-bottom: 2px;
}

.calc-form__swap:hover {
  border-color: var(--calc-accent);
  color: var(--calc-accent);
}

.calc-form__swap svg { width: 18px; height: 18px; }

.calc-form__actions {
  display: flex;
  justify-content: center;
}

.calc-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--calc-accent);
  color: #000;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 15px;
  font-weight: 700;
  padding: 14px 36px;
  border-radius: 100px;
  border: none;
  cursor: pointer;
  transition: opacity .2s, transform .15s;
}

.calc-btn:hover { opacity: .85; transform: translateY(-1px); }
.calc-btn svg { width: 18px; height: 18px; }

/* ── Result section ───────────────────────────────────────────────────────── */
.calc-result {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px 80px;
  animation: calc-fade .4s ease;
}

@keyframes calc-fade {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Distance KPIs ────────────────────────────────────────────────────────── */
.calc-distance-strip {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.calc-kpi {
  flex: 1;
  min-width: 160px;
  background: var(--calc-surface);
  border: 1px solid var(--calc-line);
  border-radius: var(--calc-radius-sm);
  padding: 22px 24px;
}

.calc-kpi__label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--calc-muted);
  margin-bottom: 8px;
}

.calc-kpi__value {
  font-size: 28px;
  font-weight: 800;
  color: #fff;
  line-height: 1;
}

.calc-kpi__unit {
  font-size: 14px;
  color: var(--calc-muted);
  margin-left: 4px;
  font-weight: 500;
}

/* ── Aircraft results ─────────────────────────────────────────────────────── */
.calc-result__title {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.calc-result__sub {
  font-size: 14px;
  color: var(--calc-muted);
  margin-bottom: 24px;
}

.calc-ac-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.calc-ac-card {
  background: var(--calc-surface);
  border: 1px solid var(--calc-line);
  border-radius: var(--calc-radius-sm);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color .2s, transform .2s;
}

.calc-ac-card:hover {
  border-color: rgba(105, 195, 255, .3);
  transform: translateY(-3px);
}

.calc-ac-card__thumb {
  aspect-ratio: 16/9;
  background: var(--calc-surface-2);
  overflow: hidden;
}

.calc-ac-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.calc-ac-card__no-thumb {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--calc-line);
}
.calc-ac-card__no-thumb svg { width: 52px; height: 52px; }

.calc-ac-card__body {
  padding: 18px 20px 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.calc-ac-card__tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 11px;
  font-weight: 600;
  color: var(--calc-green);
  text-transform: uppercase;
  letter-spacing: .08em;
}

.calc-ac-card__tag svg { width: 12px; height: 12px; }

.calc-ac-card__name {
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  line-height: 1.2;
}

.calc-ac-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  font-size: 12px;
  font-family: 'IBM Plex Mono', monospace;
  color: var(--calc-muted);
}

.calc-ac-card__dot { opacity: .4; }

.calc-ac-card__margin {
  font-size: 12px;
  color: var(--calc-muted);
  font-family: 'IBM Plex Mono', monospace;
}

.calc-ac-card__margin strong {
  color: var(--calc-green);
  font-weight: 600;
}

.calc-ac-card__cta {
  display: inline-block;
  margin-top: 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--calc-accent);
  text-decoration: none;
  transition: opacity .2s;
}
.calc-ac-card__cta:hover { opacity: .75; }

/* ── No aircraft message ─────────────────────────────────────────────────── */
.calc-no-aircraft {
  grid-column: 1 / -1;
  text-align: center;
  padding: 48px 24px;
  color: var(--calc-muted);
  font-size: 15px;
}

.calc-no-aircraft a { color: var(--calc-accent); }

/* ── Info note ────────────────────────────────────────────────────────────── */
.calc-note {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px 60px;
  font-size: 13px;
  color: var(--calc-muted);
  border-top: 1px solid var(--calc-line);
  padding-top: 20px;
  margin-top: -20px;
}

.calc-note svg { vertical-align: middle; margin-right: 6px; }
.calc-note a { color: var(--calc-accent); }

/* ── Responsive ───────────────────────────────────────────────────────────── */
@media (max-width: 640px) {
  .calc-form { padding: 24px 20px; }
  .calc-form__row { grid-template-columns: 1fr; }
  .calc-form__swap { width: 36px; height: 36px; align-self: center; transform: rotate(90deg); margin: 0 auto; }
  .calc-distance-strip { flex-direction: column; }
  .calc-ac-grid { grid-template-columns: 1fr; }
}