/* ============================================================
   BMI CALCULATOR — style.css
   Light mode default. Dark mode via [data-theme="dark"]
   ============================================================ */

.page-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 64px);
  padding: 2rem;
}

.card {
  width: 100%;
  max-width: 460px;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: 20px;
  padding: 2.5rem 2.2rem;
  box-shadow: var(--shadow-md);
  transition: background 0.3s ease, border-color 0.3s ease;
}

h1 {
  font-size: 1.85rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 0.3rem;
}

.card-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
}

/* ── Form fields ── */
.field {
  margin-bottom: 1.2rem;
}

.field label {
  display: block;
  font-size: 0.78rem;
  font-weight: 700;
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.45rem;
}

.field input[type="text"] {
  width: 100%;
  padding: 0.78rem 1rem;
  font-size: 1rem;
  font-family: var(--font);
  background: var(--surface2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  outline: none;
  transition: all 0.22s ease;
}

.field input[type="text"]:focus {
  border-color: var(--accent);
  background: var(--accent-light);
  box-shadow: 0 0 0 3px rgba(79,110,247,0.1);
}

.field input[type="text"]::placeholder {
  color: var(--text-muted);
  opacity: 0.6;
}

/* ── Button ── */
.calc-btn {
  width: 100%;
  padding: 0.85rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  letter-spacing: 0.02em;
  transition: all 0.22s ease;
  margin-top: 0.3rem;
}

.calc-btn:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(79,110,247,0.3);
}

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

/* ── Result ── */
#results {
  margin-top: 1.5rem;
  padding: 1.2rem;
  border-radius: var(--radius-sm);
  background: var(--surface2);
  border: 1.5px solid var(--border);
  text-align: center;
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--accent);
  display: none;
  animation: fadeIn 0.3s ease;
}

#results.show { display: block; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

#results .result-category {
  display: block;
  font-size: 0.72rem;
  font-family: var(--font-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 600;
  margin-top: 0.25rem;
}

/* ── Weight Guide ── */
.guide {
  margin-top: 1.5rem;
  padding-top: 1.2rem;
  border-top: 1.5px solid var(--border);
}

.guide-title {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.7rem;
  font-weight: 600;
}

.guide-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.45rem 0;
  font-size: 0.82rem;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}

.guide-row:last-child { border-bottom: none; }

.guide-row .dot {
  width: 9px; height: 9px;
  border-radius: 50%;
  display: inline-block;
  margin-right: 0.5rem;
  flex-shrink: 0;
}

.guide-row span:last-child {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
}