:root {
  --ink: #1a2744;
  --ink-soft: rgba(26, 39, 68, 0.72);
  --accent: #3b6fb8;
  --accent-deep: #2a528c;
  --foam: #eef2f8;
  --mist: #f4f6fa;
  --paper: #ffffff;
  --line: rgba(26, 39, 68, 0.12);
  --warn: #9a4d1c;
  --shadow: 0 18px 40px rgba(26, 39, 68, 0.1);
  --radius: 1rem;
  --font-brand: "Syne", sans-serif;
  --font-body: "Figtree", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 12% -10%, rgba(59, 111, 184, 0.18), transparent 60%),
    radial-gradient(900px 500px at 100% 0%, rgba(180, 140, 90, 0.12), transparent 55%),
    linear-gradient(180deg, var(--foam) 0%, var(--mist) 45%, #e8ebf2 100%);
  line-height: 1.5;
}

a {
  color: var(--accent-deep);
}

img {
  max-width: 100%;
  display: block;
}

.site-shell {
  width: min(1080px, calc(100% - 2rem));
  margin: 0 auto;
}

/* ——— Home hero ——— */
.home {
  min-height: 100vh;
  display: grid;
  align-items: center;
  padding: 2rem 0 3rem;
}

.home-stage {
  position: relative;
  overflow: hidden;
  border-radius: 1.5rem;
  min-height: min(78vh, 720px);
  background:
    linear-gradient(135deg, rgba(26, 39, 68, 0.88), rgba(59, 111, 184, 0.55)),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160' viewBox='0 0 160 160'%3E%3Cpath fill='none' stroke='rgba(255,255,255,0.08)' stroke-width='1' d='M0 80h160M80 0v160'/%3E%3Ccircle cx='80' cy='80' r='36' fill='none' stroke='rgba(255,255,255,0.1)'/%3E%3C/svg%3E"),
    linear-gradient(160deg, #1a2744 0%, #3b6fb8 52%, #c4a574 140%);
  color: #fff;
  box-shadow: var(--shadow);
}

.home-stage::after {
  content: "";
  position: absolute;
  inset: auto -10% -30% 40%;
  height: 70%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.18), transparent 65%);
  pointer-events: none;
  animation: drift 10s ease-in-out infinite alternate;
}

.home-content {
  position: relative;
  z-index: 1;
  max-width: 36rem;
  padding: clamp(2rem, 6vw, 4.5rem);
}

.brand {
  font-family: var(--font-brand);
  font-weight: 800;
  font-size: clamp(3rem, 9vw, 5.5rem);
  letter-spacing: -0.04em;
  line-height: 0.95;
  margin: 0 0 1.25rem;
  opacity: 0;
  transform: translateY(18px);
  animation: rise 0.8s ease forwards 0.1s;
}

.lead {
  margin: 0 0 0.5rem;
  font-size: clamp(1.35rem, 3vw, 1.85rem);
  font-weight: 600;
  opacity: 0;
  transform: translateY(18px);
  animation: rise 0.8s ease forwards 0.25s;
}

.support {
  margin: 0 0 2rem;
  max-width: 28rem;
  color: rgba(255, 255, 255, 0.86);
  font-size: 1.05rem;
  opacity: 0;
  transform: translateY(18px);
  animation: rise 0.8s ease forwards 0.4s;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  opacity: 0;
  transform: translateY(18px);
  animation: rise 0.8s ease forwards 0.55s;
}

.btn {
  appearance: none;
  border: 0;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  text-decoration: none;
  font-family: inherit;
  font-weight: 700;
  font-size: 1rem;
  border-radius: 0.7rem;
  padding: 0.85rem 1.25rem;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: #fff;
  color: var(--ink);
}

.btn-primary:hover {
  background: #f2f7f5;
}

.btn-ghost {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.4);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.7);
}

.home-foot {
  margin-top: 1.25rem;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

/* ——— App chrome ——— */
.app-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 0 0.5rem;
}

.app-brand {
  font-family: var(--font-brand);
  font-weight: 800;
  font-size: 1.45rem;
  letter-spacing: -0.03em;
  text-decoration: none;
  color: var(--ink);
}

.app-brand span {
  color: var(--accent);
}

.page {
  padding-bottom: 3rem;
}

.page-header {
  padding: 1rem 0 1.5rem;
}

.page-header h1 {
  margin: 0 0 0.35rem;
  font-family: var(--font-brand);
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.page-header p {
  margin: 0;
  color: var(--ink-soft);
  max-width: 40rem;
}

.layout {
  display: grid;
  grid-template-columns: 1.4fr 0.9fr;
  gap: 1.25rem;
  align-items: start;
}

@media (max-width: 860px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .result-panel {
    position: static !important;
  }
}

.panel {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.1rem;
}

.panel h2 {
  margin: 0 0 0.85rem;
  font-size: 1.05rem;
  letter-spacing: 0.01em;
}

.factor-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.factor {
  display: grid;
  grid-template-columns: 1.4rem 1fr;
  gap: 0.75rem;
  align-items: start;
  padding: 0.9rem 0.35rem;
  border-top: 1px solid var(--line);
  cursor: pointer;
  transition: background 0.2s ease;
}

.factor:first-child {
  border-top: 0;
}

.factor:hover {
  background: rgba(59, 111, 184, 0.05);
}

.factor input {
  margin-top: 0.25rem;
  width: 1.05rem;
  height: 1.05rem;
  accent-color: var(--accent);
}

.factor strong {
  display: block;
  font-size: 1rem;
  margin-bottom: 0.15rem;
}

.factor small {
  display: block;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.result-panel {
  position: sticky;
  top: 1rem;
  overflow: hidden;
}

.result-score {
  display: flex;
  align-items: baseline;
  gap: 0.65rem;
  margin-bottom: 0.75rem;
}

.result-score .value {
  font-family: var(--font-brand);
  font-size: 3.4rem;
  font-weight: 800;
  letter-spacing: -0.05em;
  line-height: 1;
  color: var(--accent-deep);
  transition: transform 0.25s ease, color 0.25s ease;
}

.result-score .value.is-updating {
  transform: scale(1.08);
  color: var(--accent);
}

.result-score .label {
  color: var(--ink-soft);
  font-weight: 600;
}

.class-badge {
  display: inline-block;
  margin-bottom: 0.75rem;
  padding: 0.35rem 0.7rem;
  border-radius: 0.5rem;
  background: rgba(59, 111, 184, 0.12);
  color: var(--accent-deep);
  font-weight: 700;
  font-size: 0.92rem;
}

.class-badge.elevated {
  background: rgba(154, 77, 28, 0.12);
  color: var(--warn);
}

.result-panel .risk {
  margin: 0 0 0.85rem;
  font-size: 1.05rem;
}

.result-panel .risk strong {
  font-size: 1.25rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1rem;
}

.btn-solid {
  background: var(--accent);
  color: #fff;
}

.btn-solid:hover {
  background: var(--accent-deep);
}

.btn-outline {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent-deep);
}

.note,
.disclaimer {
  margin-top: 1.25rem;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.disclaimer {
  border-top: 1px solid var(--line);
  padding-top: 1rem;
}

.ref {
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: var(--ink-soft);
}

@keyframes rise {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes drift {
  from {
    transform: translate3d(0, 0, 0);
  }
  to {
    transform: translate3d(-4%, -3%, 0);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .brand,
  .lead,
  .support,
  .cta-row {
    opacity: 1;
    transform: none;
  }
}