:root {
  --bg: #f4f7f2;
  --card: #ffffff;
  --text: #142018;
  --muted: #66736a;
  --line: #dbe5dc;
  --primary: #1f7a4c;
  --primary-dark: #155c38;
  --primary-soft: #e5f5ec;
  --accent: #f0a32f;
  --danger: #c0392b;
  --shadow: 0 20px 60px rgba(20, 32, 24, 0.12);
  --radius: 24px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(31, 122, 76, 0.18), transparent 34rem),
    linear-gradient(135deg, #f8fbf7 0%, var(--bg) 50%, #edf5ef 100%);
  color: var(--text);
}

button,
input,
select {
  font: inherit;
}

.page {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 40px 0;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--primary);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 740px;
  margin: 0;
  font-size: clamp(2rem, 5vw, 4.2rem);
  line-height: 1.02;
  letter-spacing: -0.05em;
}

.subtitle {
  max-width: 700px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.12rem);
  line-height: 1.7;
}

.hero-badge {
  width: 142px;
  height: 142px;
  display: grid;
  place-items: center;
  grid-template-columns: 1fr 1fr;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.95);
  border-radius: 36px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
  font-size: 3rem;
}

.calculator-card,
.info-card {
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.calculator-card {
  padding: clamp(20px, 4vw, 34px);
}

.card-header {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 26px;
}

.card-header h2 {
  margin: 0;
  font-size: clamp(1.35rem, 3vw, 2rem);
  letter-spacing: -0.03em;
}

.card-header p {
  margin: 8px 0 0;
  color: var(--muted);
  line-height: 1.5;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  padding: 9px 12px;
  color: var(--primary-dark);
  background: var(--primary-soft);
  border: 1px solid rgba(31, 122, 76, 0.12);
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 700;
}

.status-dot {
  width: 9px;
  height: 9px;
  background: var(--primary);
  border-radius: 999px;
  box-shadow: 0 0 0 5px rgba(31, 122, 76, 0.12);
}

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

.field {
  display: grid;
  gap: 9px;
}

.field > span {
  color: #2b3a2f;
  font-size: 0.94rem;
  font-weight: 700;
}

select,
input {
  width: 100%;
  height: 54px;
  color: var(--text);
  background: #fbfdfb;
  border: 1px solid var(--line);
  border-radius: 16px;
  outline: none;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

select {
  padding: 0 16px;
  cursor: pointer;
}

input {
  padding: 0 72px 0 16px;
}

select:focus,
input:focus {
  background: #ffffff;
  border-color: rgba(31, 122, 76, 0.72);
  box-shadow: 0 0 0 5px rgba(31, 122, 76, 0.12);
}

.input-with-suffix {
  position: relative;
}

.input-with-suffix span {
  position: absolute;
  top: 50%;
  right: 14px;
  transform: translateY(-50%);
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 800;
  pointer-events: none;
}

.actions {
  display: flex;
  gap: 12px;
  margin-top: 22px;
}

button {
  min-height: 54px;
  border: 0;
  border-radius: 16px;
  font-weight: 800;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

button[type="submit"] {
  flex: 1;
  color: #ffffff;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  box-shadow: 0 14px 28px rgba(31, 122, 76, 0.24);
}

.secondary-btn {
  width: 120px;
  color: var(--text);
  background: #eef4ef;
  border: 1px solid var(--line);
}

button:hover {
  transform: translateY(-1px);
}

button:active {
  transform: translateY(0);
}

.message {
  min-height: 22px;
  margin: 14px 0 0;
  color: var(--danger);
  font-size: 0.94rem;
  font-weight: 700;
}

.results {
  display: grid;
  grid-template-columns: 1.1fr 1fr 1fr;
  gap: 14px;
  margin-top: 18px;
}

.result-box {
  min-height: 132px;
  padding: 18px;
  display: grid;
  align-content: center;
  gap: 8px;
  background: #f7faf7;
  border: 1px solid var(--line);
  border-radius: 20px;
}

.result-box.primary {
  color: #ffffff;
  background:
    radial-gradient(circle at top right, rgba(255, 255, 255, 0.28), transparent 10rem),
    linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-color: transparent;
}

.result-box.muted {
  background: #fff9ed;
  border-color: #f4dfb6;
}

.result-box span {
  color: inherit;
  opacity: 0.82;
  font-size: 0.9rem;
  font-weight: 700;
}

.result-box strong {
  font-size: clamp(2rem, 4vw, 2.8rem);
  line-height: 1;
  letter-spacing: -0.06em;
}

.result-box small {
  color: inherit;
  opacity: 0.72;
  font-weight: 800;
}

.info-card {
  margin-top: 20px;
  padding: 24px;
}

.info-card h3 {
  margin: 0 0 16px;
  font-size: 1.2rem;
}

.tips {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.tips div {
  padding: 18px;
  background: #f8fbf8;
  border: 1px solid var(--line);
  border-radius: 18px;
}

.tips strong {
  display: block;
  margin-bottom: 8px;
}

.tips p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

@media (max-width: 760px) {
  .page {
    width: min(100% - 24px, 560px);
    padding: 24px 0;
  }

  .hero {
    grid-template-columns: 1fr;
  }

  .hero-badge {
    width: 100%;
    height: 92px;
    border-radius: 26px;
  }

  .calculator-card {
    border-radius: 22px;
  }

  .card-header {
    flex-direction: column;
  }

  .form-grid,
  .results,
  .tips {
    grid-template-columns: 1fr;
  }

  .actions {
    flex-direction: column;
  }

  .secondary-btn {
    width: 100%;
  }

  .result-box {
    min-height: 112px;
  }
}

@media (max-width: 380px) {
  .page {
    width: min(100% - 18px, 560px);
  }

  .calculator-card,
  .info-card {
    padding: 18px;
  }

  input {
    padding-right: 64px;
  }
}