:root {
  --bg: #0f1412;
  --bg-elev: #17201c;
  --ink: #f3f7f4;
  --muted: #9db0a6;
  --line: rgba(243, 247, 244, 0.08);
  --accent: #7dd3a8;
  --accent-2: #c9f27a;
  --danger: #ff8a7a;
  --magreza: #7ec8e3;
  --normal: #7dd3a8;
  --sobrepeso: #f0c35a;
  --ob1: #f08a4a;
  --ob2: #e85d4c;
  --ob3: #c43d5a;
  --radius: 22px;
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "DM Sans", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
  padding: 28px 20px 48px;
  overflow-x: hidden;
}

.bg-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(70px);
  pointer-events: none;
  z-index: 0;
}

.bg-orb-1 {
  width: 420px;
  height: 420px;
  background: rgba(125, 211, 168, 0.16);
  top: -120px;
  right: -80px;
}

.bg-orb-2 {
  width: 360px;
  height: 360px;
  background: rgba(126, 200, 227, 0.12);
  bottom: 10%;
  left: -140px;
}

.bg-orb-3 {
  width: 240px;
  height: 240px;
  background: rgba(201, 242, 122, 0.08);
  top: 40%;
  right: 12%;
}

.topbar,
.layout,
.history-card,
.info-card,
footer {
  position: relative;
  z-index: 1;
  max-width: 1080px;
  margin: 0 auto;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  margin-bottom: 28px;
}

.brand {
  display: flex;
  gap: 14px;
  align-items: center;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background:
    radial-gradient(circle at 30% 30%, #c9f27a, transparent 45%),
    linear-gradient(135deg, #7dd3a8, #2e6b52);
  box-shadow: 0 8px 20px rgba(125, 211, 168, 0.28);
}

.brand-kicker {
  margin: 0;
  color: var(--accent);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 600;
}

h1, h2 {
  font-family: "Fraunces", serif;
  margin: 0;
  font-weight: 600;
}

h1 {
  font-size: 32px;
  letter-spacing: -0.03em;
}

h2 {
  font-size: 22px;
}

.brand-note,
.muted,
.disclaimer,
footer {
  color: var(--muted);
}

.brand-note {
  margin: 0;
  max-width: 280px;
  text-align: right;
  font-size: 14px;
}

.layout {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 18px;
  margin-bottom: 18px;
}

.card {
  background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.015));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.form-card p,
.result-card p {
  margin-top: 8px;
}

form {
  margin-top: 18px;
  display: grid;
  gap: 16px;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.field {
  display: grid;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
}

.field em,
.sexo-field em {
  font-style: normal;
  font-weight: 400;
  color: var(--muted);
}

.input-wrap {
  position: relative;
}

input[type="number"] {
  width: 100%;
  background: #101714;
  border: 1px solid var(--line);
  color: var(--ink);
  border-radius: 14px;
  padding: 13px 54px 13px 14px;
  font: inherit;
  font-size: 16px;
  outline: none;
}

input[type="number"]:focus {
  border-color: rgba(125, 211, 168, 0.7);
  box-shadow: 0 0 0 4px rgba(125, 211, 168, 0.12);
}

.suffix {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
}

.sexo-field {
  border: 0;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 8px;
}

.sexo-field legend {
  font-size: 13px;
  font-weight: 600;
  padding: 0;
}

.sexo-options {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  cursor: pointer;
}

.chip input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.chip span {
  display: inline-block;
  padding: 10px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #101714;
  font-size: 13px;
  font-weight: 500;
}

.chip input:checked + span {
  background: rgba(125, 211, 168, 0.16);
  border-color: rgba(125, 211, 168, 0.5);
  color: var(--accent);
}

.error {
  margin: 0;
  color: var(--danger);
  font-size: 13px;
  font-weight: 600;
}

.actions {
  display: flex;
  gap: 10px;
}

button {
  font: inherit;
  cursor: pointer;
  border: 0;
}

.btn-primary,
.btn-ghost {
  border-radius: 14px;
  padding: 12px 16px;
  font-weight: 700;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #4ea87d);
  color: #082016;
  flex: 1;
}

.btn-primary:hover {
  filter: brightness(1.05);
}

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

.result-empty,
.result-filled {
  min-height: 420px;
}

.result-empty {
  display: grid;
  place-content: center;
  text-align: center;
  gap: 8px;
}

.empty-gauge {
  width: 84px;
  height: 84px;
  margin: 0 auto 10px;
  border-radius: 50%;
  border: 8px solid #24332c;
  border-top-color: var(--accent);
  opacity: 0.7;
}

.result-kicker {
  margin: 0;
  color: var(--accent);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 700;
}

.imc-hero {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 8px 0 4px;
}

.imc-value {
  font-family: "Fraunces", serif;
  font-size: 72px;
  line-height: 1;
  margin: 0;
  letter-spacing: -0.04em;
}

.imc-label {
  margin: 0;
  color: var(--muted);
  font-weight: 700;
}

.classificacao {
  display: inline-block;
  margin: 8px 0 12px;
  padding: 6px 12px;
  border-radius: 999px;
  font-weight: 700;
  background: rgba(255,255,255,0.06);
}

.dica {
  margin: 0 0 22px;
  color: var(--muted);
}

.gauge {
  position: relative;
  margin-bottom: 24px;
}

.gauge-track {
  display: grid;
  grid-template-columns: 1.1fr 2.9fr 2.2fr 2.2fr 2.2fr 1.8fr;
  height: 12px;
  border-radius: 999px;
  overflow: hidden;
}

.seg.magreza, .dot.magreza { background: var(--magreza); }
.seg.normal, .dot.normal { background: var(--normal); }
.seg.sobrepeso, .dot.sobrepeso { background: var(--sobrepeso); }
.seg.ob1, .dot.ob1 { background: var(--ob1); }
.seg.ob2, .dot.ob2 { background: var(--ob2); }
.seg.ob3, .dot.ob3 { background: var(--ob3); }

.gauge-marker {
  position: absolute;
  top: -5px;
  width: 4px;
  height: 22px;
  background: #fff;
  border-radius: 4px;
  transform: translateX(-50%);
  box-shadow: 0 0 0 4px rgba(255,255,255,0.12);
  left: 0;
  transition: left 0.35s ease;
}

.gauge-labels {
  display: flex;
  justify-content: space-between;
  margin-top: 8px;
  font-size: 11px;
  color: var(--muted);
}

.stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 0;
}

.stats div {
  background: rgba(16, 23, 20, 0.8);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 12px 14px;
}

dt {
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
}

dd {
  margin: 4px 0 0;
  font-size: 18px;
  font-weight: 700;
}

.history-card,
.info-card {
  margin-top: 18px;
}

.history-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.table-wrap {
  overflow-x: auto;
  margin-top: 14px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

th, td {
  text-align: left;
  padding: 12px 10px;
  border-bottom: 1px solid var(--line);
}

th {
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.empty-row td {
  color: var(--muted);
  text-align: center;
}

.formula {
  font-family: "Fraunces", serif;
  font-size: 20px;
  margin: 10px 0 16px;
}

.legend {
  list-style: none;
  padding: 0;
  margin: 0 0 16px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 16px;
}

.dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-right: 8px;
}

.disclaimer,
footer p {
  font-size: 13px;
}

footer {
  margin-top: 20px;
  text-align: center;
}

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

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

  .brand-note {
    text-align: left;
  }

  .imc-value {
    font-size: 56px;
  }

  .result-empty,
  .result-filled {
    min-height: unset;
  }
}