:root {
  color-scheme: light;
  --ink: #133033;
  --muted: #5a7372;
  --panel: rgba(255, 255, 255, 0.92);
  --panel-strong: #ffffff;
  --line: rgba(15, 118, 110, 0.18);
  --teal: #0f766e;
  --teal-dark: #115e59;
  --coral: #f9735b;
  --sky: #d7f3f7;
  --sand: #f7e8bd;
  --shadow: 0 22px 60px rgba(19, 48, 51, 0.16);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(20, 184, 166, 0.22), transparent 34rem),
    linear-gradient(150deg, #effbfc 0%, var(--sky) 44%, var(--sand) 100%);
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  content: "";
  background-image:
    linear-gradient(112deg, transparent 0 42%, rgba(255, 255, 255, 0.34) 42% 44%, transparent 44%),
    linear-gradient(156deg, transparent 0 52%, rgba(15, 118, 110, 0.11) 52% 53%, transparent 53%);
  background-size: 180px 120px, 230px 150px;
  opacity: 0.75;
}

.app-shell {
  width: min(100%, 1120px);
  margin: 0 auto;
  padding: 20px;
  display: grid;
  gap: 16px;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.hero-panel {
  display: grid;
  grid-template-columns: 72px 1fr;
  align-items: center;
  gap: 14px;
  padding: 18px;
}

.brand-mark {
  width: 72px;
  aspect-ratio: 1;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: linear-gradient(145deg, rgba(15, 118, 110, 0.13), rgba(249, 115, 91, 0.18));
  border: 1px solid var(--line);
}

.brand-mark img {
  width: 58px;
  height: 58px;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--teal-dark);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  letter-spacing: 0;
}

h1 {
  max-width: 13ch;
  font-size: clamp(1.4rem, 10vw, 4.4rem);
  line-height: 0.92;
}

h2 {
  font-size: 1.65rem;
}

.form-panel,
.result-panel {
  padding: 18px;
}

.form-panel h2 {
  margin-bottom: 16px;
}

.field-grid {
  display: grid;
  gap: 12px;
}

label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 700;
}

input,
select,
button {
  width: 100%;
  min-height: 46px;
  border-radius: 8px;
  font: inherit;
}

input,
select {
  border: 1px solid rgba(19, 48, 51, 0.18);
  background: var(--panel-strong);
  color: var(--ink);
  padding: 0 12px;
  outline: none;
}

input:focus,
select:focus {
  border-color: var(--teal);
  box-shadow: 0 0 0 4px rgba(20, 184, 166, 0.16);
}

input:disabled {
  color: rgba(90, 115, 114, 0.7);
  background: rgba(255, 255, 255, 0.55);
}

button {
  margin-top: 16px;
  border: 0;
  color: #ffffff;
  background: linear-gradient(135deg, var(--teal), var(--teal-dark));
  font-weight: 850;
  cursor: pointer;
  box-shadow: 0 12px 26px rgba(15, 118, 110, 0.26);
}

button:active {
  transform: translateY(1px);
}

.errors {
  min-height: 1.25rem;
  margin: 12px 0 0;
  color: #b42318;
  font-weight: 750;
}

.result-panel {
  display: grid;
  gap: 14px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(255, 255, 255, 0.86)),
    linear-gradient(135deg, rgba(15, 118, 110, 0.18), rgba(249, 115, 91, 0.18));
}

.result-heading {
  display: grid;
  gap: 2px;
}

.selected-result {
  font-size: clamp(3rem, 17vw, 6rem);
  font-weight: 900;
  line-height: 0.95;
  color: var(--teal-dark);
}

.kite-summary {
  color: var(--muted);
  font-weight: 720;
}

.price-grid {
  display: grid;
  border-top: 1px solid rgba(19, 48, 51, 0.12);
  border-bottom: 1px solid rgba(19, 48, 51, 0.12);
}

.price-card {
  display: grid;
  gap: 4px;
  min-height: 78px;
  padding: 12px 14px;
  border-left: 4px solid transparent;
}

.price-card + .price-card {
  border-top: 1px solid rgba(19, 48, 51, 0.12);
}

.price-card span {
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 800;
}

.price-card strong {
  font-size: 1.75rem;
}

.price-card.selected {
  border-left-color: var(--coral);
  background: rgba(255, 246, 241, 0.88);
}

.explanation {
  display: grid;
  gap: 10px;
  margin: 0;
}

.explanation div {
  display: grid;
  gap: 2px;
  padding-top: 10px;
  border-top: 1px solid rgba(19, 48, 51, 0.12);
}

.explanation dt {
  color: var(--teal-dark);
  font-weight: 850;
}

.explanation dd {
  margin: 0;
  color: var(--muted);
  line-height: 1.45;
}

@media (min-width: 720px) {
  .app-shell {
    grid-template-columns: 1fr 0.86fr;
    padding: 28px;
  }

  .hero-panel {
    grid-column: 1 / -1;
  }

  h1 {
    max-width: none;
    font-size: clamp(3.4rem, 6vw, 5.25rem);
  }

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

  .form-panel,
  .result-panel {
    padding: 22px;
  }
}

@media (min-width: 1040px) {
  .app-shell {
    align-items: start;
  }

  .result-panel {
    position: sticky;
    top: 28px;
  }
}