/* ============================================================
   PT. Son Duct Sejahtera — HVAC calculator UI
   ============================================================ */
.calc-wrap { max-width: 1000px; margin: 0 auto; }
.calc-card {
  background: #fff; border: 1px solid var(--border); border-radius: 14px;
  padding: 26px; box-shadow: var(--shadow);
}
.calc-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px 22px; }
.calc-field { display: flex; flex-direction: column; gap: 6px; }
.calc-field label { font-weight: 700; color: var(--navy); font-size: .9rem; }
.calc-field .hint { color: var(--text-light); font-size: .78rem; font-weight: 500; }
.calc-field input, .calc-field select {
  font-family: inherit; font-size: 1rem; padding: 10px 12px; color: var(--text);
  border: 1px solid var(--border); border-radius: 8px; background: #fff; width: 100%;
}
.calc-field input:focus, .calc-field select:focus {
  outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px rgba(29, 111, 184, .15);
}
.calc-input { display: flex; }
.calc-input input { border-top-right-radius: 0; border-bottom-right-radius: 0; }
.calc-input select {
  width: auto; border-left: 0; border-top-left-radius: 0; border-bottom-left-radius: 0;
  background: var(--bg-soft); font-weight: 700; color: var(--navy);
}
.calc-adv { margin-top: 14px; border-top: 1px solid var(--border); padding-top: 8px; }
.calc-adv summary { cursor: pointer; font-weight: 700; color: var(--blue); font-size: .9rem; padding: 6px 0; }

/* mode toggle + simple-mode section headings */
.calc-mode { display: flex; gap: 8px; margin-bottom: 20px; flex-wrap: wrap; }
.calc-mode-btn {
  flex: 1 1 180px; cursor: pointer; font-family: inherit; font-weight: 700; font-size: .9rem;
  padding: 11px 16px; border-radius: 10px; border: 1px solid var(--border);
  background: #fff; color: var(--navy); transition: .15s;
}
.calc-mode-btn:hover { border-color: var(--blue); }
.calc-mode-btn.active { background: var(--navy); color: #fff; border-color: var(--navy); }
.calc-mode-intro { color: var(--text-light); font-size: .9rem; margin: 0 0 16px; line-height: 1.6; }
.calc-section-h {
  color: var(--navy); font-size: 1rem; font-weight: 800; margin: 20px 0 12px;
  padding-bottom: 7px; border-bottom: 1px solid var(--border);
}
.calc-section-h:first-of-type { margin-top: 4px; }

/* Calculate button + gated results */
.calc-go {
  display: inline-flex; align-items: center; gap: 8px; cursor: pointer;
  font-family: inherit; font-weight: 800; font-size: 1rem; line-height: 1;
  color: #fff; background: var(--accent); border: 0; border-radius: 10px;
  padding: 14px 30px; margin: 22px 0 2px; transition: .15s;
}
.calc-go:hover { background: var(--accent-dark); transform: translateY(-1px); box-shadow: 0 6px 18px rgba(193,39,45,.28); }
.calc-go:active { transform: translateY(0); }
.calc-validate { color: var(--accent); font-weight: 700; font-size: .9rem; margin: 12px 0 0; }
.calc-out { display: none; }
.calc-out.show { display: block; }

.calc-summary { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin: 24px 0 18px; }
.calc-sum { background: var(--navy); color: #fff; border-radius: 12px; padding: 16px 18px; }
.calc-sum .k { font-size: .76rem; color: #c9d8e8; text-transform: uppercase; letter-spacing: .5px; }
.calc-sum .v { font-size: 1.18rem; font-weight: 800; color: #ffd34d; margin-top: 4px; }

.calc-results { width: 100%; border-collapse: collapse; margin-top: 6px; }
.calc-results th {
  text-align: left; font-size: .76rem; text-transform: uppercase; letter-spacing: .5px;
  color: var(--text-light); padding: 10px 12px; border-bottom: 2px solid var(--border);
}
.calc-results td { padding: 13px 12px; border-bottom: 1px solid var(--border); font-size: .95rem; vertical-align: top; }
.calc-results td.lbl { font-weight: 700; color: var(--navy); max-width: 220px; }
.calc-results td.dn { font-weight: 800; color: var(--blue); font-size: 1.1rem; }
.calc-results .u { color: var(--text-light); font-size: .82rem; font-weight: 500; }
.calc-results .sub { color: var(--text-light); font-size: .78rem; margin-top: 2px; }
.calc-results tr.over td { background: #fff3f2; }
.calc-results tr.hl td { background: #eaf4ff; }
.calc-results tr.sub-row td { font-weight: 700; background: var(--bg-soft); }
.calc-results tr.tot-row td { font-weight: 800; color: var(--navy); background: #eaf4ff; border-top: 2px solid var(--blue); }
.calc-intensity { margin-top: 14px; font-weight: 700; color: var(--blue); font-size: .95rem; }
.calc-branch-out {
  margin: 18px 0 4px; padding: 14px 16px; border-radius: 10px;
  background: var(--blue-light); border: 1px solid #cfe0f1;
  font-weight: 700; color: var(--navy); font-size: .95rem;
}
.calc-results .warn { display: block; color: var(--accent); font-size: .74rem; font-weight: 600; margin-top: 3px; }

.calc-note { margin-top: 20px; color: var(--text-light); font-size: .82rem; line-height: 1.65; }
.calc-note strong { color: var(--navy); }

@media (max-width: 640px) {
  .calc-card { padding: 18px; }
  .calc-grid { grid-template-columns: 1fr; }
  .calc-summary { grid-template-columns: 1fr; }
  .calc-results td, .calc-results th { padding: 9px 8px; font-size: .88rem; }
  .calc-results td.lbl { max-width: 140px; }
}