:root {
  --bg: #f7f1e8;
  --bg-accent: #efe1cd;
  --card: rgba(255, 252, 247, 0.92);
  --card-strong: #fffaf2;
  --text: #24170f;
  --muted: #715c50;
  --line: rgba(95, 64, 44, 0.16);
  --accent: #b85c27;
  --accent-dark: #843712;
  --accent-soft: #f6d9be;
  --shadow: 0 24px 60px rgba(72, 43, 23, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Manrope", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.85), transparent 28%),
    linear-gradient(160deg, var(--bg) 0%, var(--bg-accent) 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.12) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.25), transparent 85%);
}

.app {
  width: min(960px, calc(100% - 32px));
  margin: 0 auto;
  padding: 40px 0 56px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.hero {
  padding: 32px;
}

.eyebrow {
  margin: 0 0 12px;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  line-height: 0.95;
  letter-spacing: -0.04em;
}

.intro {
  max-width: 58ch;
  margin-top: 16px;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.6;
}

.plans {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 20px;
  padding: 20px;
}

.plan {
  padding: 24px;
  border-radius: 22px;
  border: 1px solid var(--line);
}

.plan-current {
  background: var(--card-strong);
}

.plan-next {
  background: linear-gradient(180deg, rgba(246, 217, 190, 0.8), rgba(255, 250, 242, 0.92));
}

.plan-tag {
  display: inline-flex;
  margin-bottom: 14px;
  padding: 7px 11px;
  border-radius: 999px;
  background: rgba(184, 92, 39, 0.1);
  color: var(--accent-dark);
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.plan h2 {
  font-size: 1.7rem;
  letter-spacing: -0.03em;
}

.plan-price {
  margin-top: 12px;
  font-size: 1.2rem;
  font-weight: 700;
}

.plan-total {
  margin-top: 8px;
  color: var(--muted);
}

.calculator {
  display: grid;
  gap: 24px;
  margin-top: 20px;
  padding: 28px;
}

.input-group {
  display: grid;
  gap: 10px;
}

.input-group label {
  font-weight: 700;
}

.input-group input {
  width: min(240px, 100%);
  padding: 16px 18px;
  border: 1px solid rgba(132, 55, 18, 0.18);
  border-radius: 18px;
  background: #fffdf9;
  color: var(--text);
  font: inherit;
  font-size: 1.1rem;
  font-weight: 700;
  transition: border-color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}

.input-group input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(184, 92, 39, 0.15);
  transform: translateY(-1px);
}

.help-text {
  color: var(--muted);
  font-size: 0.92rem;
}

.difference {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 18px 20px;
  border-radius: 20px;
  background: linear-gradient(135deg, rgba(184, 92, 39, 0.1), rgba(246, 217, 190, 0.72));
  border: 1px solid rgba(184, 92, 39, 0.12);
}

.difference span {
  color: var(--muted);
  font-weight: 700;
}

.difference strong {
  font-size: 1.5rem;
  letter-spacing: -0.03em;
}

.result {
  display: grid;
  gap: 18px;
}

.result-highlight {
  padding: 24px;
  border-radius: 24px;
  background: #1e130d;
  color: #fff7ef;
}

.result-highlight p {
  color: rgba(255, 247, 239, 0.72);
}

.result-highlight strong {
  display: block;
  margin-top: 10px;
  font-size: clamp(2rem, 4vw, 2.8rem);
  letter-spacing: -0.05em;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.result-card {
  padding: 20px;
  border-radius: 22px;
  border: 1px solid var(--line);
  background: var(--card-strong);
}

.result-card span {
  display: block;
  color: var(--muted);
}

.result-card strong {
  display: block;
  margin-top: 10px;
  font-size: 1.6rem;
  letter-spacing: -0.03em;
}

@media (max-width: 720px) {
  .app {
    width: min(100% - 20px, 960px);
    padding: 20px 0 32px;
  }

  .hero,
  .plans,
  .calculator {
    padding: 20px;
  }

  .plans,
  .result-grid {
    grid-template-columns: 1fr;
  }

  .difference {
    align-items: flex-start;
    flex-direction: column;
  }
}