/* ============================================================
   Khama — calc.css
   Standalone size calculator (/قياس).
   Layered on top of styles.css + colors_and_type.css.
   ============================================================ */

.page-calc { background: var(--paper); }

/* Reuse landing's .container (defined in styles.css). On inner pages we want
   a bit less side padding on mobile so the form fields breathe. */
.page-calc .container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-inline: 22px;
}
@media (min-width: 720px) { .page-calc .container { padding-inline: 40px; } }

/* ===== HEADER ===== */
.calc-hero {
  padding: calc(var(--nav-h) + 32px) 0 28px;
  text-align: center;
}
@media (min-width: 720px) { .calc-hero { padding: calc(var(--nav-h) + 56px) 0 40px; } }

.calc-eyebrow {
  font-family: var(--font-ui);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--gold);
  text-transform: none;
  margin: 0 0 14px;
  font-weight: 700;
}
.calc-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 7vw, 64px);
  line-height: 1.1;
  letter-spacing: -0.012em;
  color: var(--ink);
  margin: 0 auto 18px;
  max-width: 18ch;
  text-wrap: balance;
}
.calc-sub {
  font-family: var(--font-text);
  font-size: clamp(15px, 3.6vw, 18px);
  line-height: 1.7;
  color: var(--gray);
  margin: 0 auto;
  max-width: 56ch;
  text-wrap: pretty;
}

/* ===== MAIN ===== */
.calc { padding: 24px 0 64px; }
@media (min-width: 720px) { .calc { padding: 32px 0 96px; } }

.calc-shell {
  max-width: 620px;
  margin: 0 auto;
  background: #fff;
  border: 1px solid var(--gray-line);
  border-radius: 28px;
  box-shadow: 0 24px 60px -30px rgba(26,10,16,.18);
  overflow: hidden;
}

/* Tabs */
.calc-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: var(--cream-warm);
  border-bottom: 1px solid var(--gray-line);
}
.calc-tab {
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 600;
  background: transparent;
  border: 0;
  padding: 16px 12px;
  color: var(--gray);
  cursor: pointer;
  position: relative;
  transition: color var(--t-quick), background var(--t-quick);
}
@media (min-width: 540px) { .calc-tab { font-size: 15px; padding: 18px 14px; } }
.calc-tab:hover { color: var(--ink); }
.calc-tab.is-active {
  color: var(--ink);
  background: #fff;
  font-weight: 700;
}
.calc-tab.is-active::after {
  content: "";
  position: absolute;
  inset-inline: 16%;
  bottom: -1px;
  height: 2px;
  background: var(--emerald-deep);
  border-radius: 2px;
}

/* Panel + form */
.calc-panel { padding: 28px 22px 30px; }
@media (min-width: 720px) { .calc-panel { padding: 36px 36px 40px; } }
.calc-panel[hidden] { display: none; }

.calc-helper {
  font-family: var(--font-text);
  font-size: 14px;
  color: var(--gray);
  margin: 0 0 22px;
  line-height: 1.65;
  padding: 12px 14px;
  background: var(--cream);
  border-radius: 14px;
  border-inline-start: 3px solid var(--gold);
}

.calc-form {
  display: flex; flex-direction: column;
  gap: 20px;
}
.calc-field {
  display: flex; flex-direction: column;
  gap: 6px;
}
.calc-label {
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: .01em;
}
.calc-input-wrap {
  position: relative;
  display: flex;
  align-items: stretch;
}
.calc-input-wrap input {
  flex: 1;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  padding: 14px 16px;
  padding-inline-end: 56px;
  border: 1px solid var(--gray-line);
  border-radius: 14px;
  background: var(--cream);
  color: var(--ink);
  width: 100%;
  transition: border-color var(--t-quick), box-shadow var(--t-quick), background var(--t-quick);
  -moz-appearance: textfield;
}
.calc-input-wrap input::-webkit-outer-spin-button,
.calc-input-wrap input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
.calc-input-wrap input:focus {
  outline: none;
  border-color: var(--emerald-deep);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(93, 2, 42, .12);
}
.calc-unit {
  position: absolute;
  inset-inline-end: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-ui);
  font-size: 13px;
  color: var(--gray);
  pointer-events: none;
  font-weight: 600;
}
.calc-hint {
  font-family: var(--font-text);
  font-size: 13px;
  color: var(--gray);
  line-height: 1.5;
}

.calc-submit {
  margin-top: 6px;
  background: var(--emerald-deep);
  color: #fff;
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 16px;
  padding: 16px 24px;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  transition: background var(--t-quick), transform .15s var(--ease-out);
}
.calc-submit:hover { background: var(--emerald-ink); }
.calc-submit:active { transform: scale(.97); }

/* ===== OUTPUT ===== */
.calc-output {
  position: relative;
  background: linear-gradient(180deg, var(--cream-warm) 0%, var(--paper) 100%);
  border-top: 1px solid var(--gray-line);
  padding: 28px 22px 30px;
}
@media (min-width: 720px) { .calc-output { padding: 36px 36px 40px; } }
.calc-output[hidden] { display: none; }

.calc-output-head {
  display: flex; flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  padding-bottom: 18px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--gray-line);
}
.calc-output-eyebrow {
  font-family: var(--font-ui);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gray);
  font-weight: 600;
}
.calc-output-letter {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(48px, 12vw, 88px);
  line-height: 1;
  color: var(--emerald-deep);
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  margin-top: 4px;
}
.calc-output-name {
  font-family: var(--font-text);
  font-size: 16px;
  color: var(--ink-soft);
  font-weight: 500;
  margin-top: 2px;
}

.calc-output-confirm {
  margin: 0 0 18px;
}
.calc-output-line {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(18px, 4vw, 22px);
  line-height: 1.4;
  color: var(--ink);
  margin: 0 0 6px;
  text-wrap: balance;
}
.calc-output-sub {
  font-family: var(--font-text);
  font-size: 14px;
  color: var(--gray);
  line-height: 1.65;
  margin: 0;
}

.calc-output-meas {
  list-style: none;
  padding: 0;
  margin: 0 0 22px;
  display: flex; flex-direction: column;
  gap: 8px;
}
.calc-output-meas li {
  display: flex; justify-content: space-between; align-items: baseline;
  gap: 12px;
  padding: 10px 14px;
  background: #fff;
  border: 1px solid var(--gray-line);
  border-radius: 12px;
}
.calc-meas-label {
  font-family: var(--font-text);
  font-size: 14px;
  color: var(--ink-soft);
}
.calc-meas-value {
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.calc-output-actions {
  display: flex; flex-direction: column;
  gap: 10px;
  margin-bottom: 14px;
}
.calc-output-actions .btn-pri,
.calc-output-actions .btn-ghost {
  justify-content: center;
  text-align: center;
}
@media (min-width: 540px) {
  .calc-output-actions { flex-direction: row; flex-wrap: wrap; }
  .calc-output-actions .btn-pri,
  .calc-output-actions .btn-ghost { flex: 1 1 200px; }
}

.calc-output-reset {
  background: transparent;
  border: 0;
  color: var(--gray);
  font-family: var(--font-ui);
  font-size: 13px;
  padding: 10px 14px;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
  align-self: center;
}
.calc-output-reset:hover { color: var(--emerald-deep); }

.calc-output-fineprint {
  font-family: var(--font-ui);
  font-size: 12px;
  color: var(--gray);
  text-align: center;
  margin: 6px 0 0;
  line-height: 1.6;
}

/* Toast */
.calc-toast {
  position: absolute;
  top: 14px;
  inset-inline-start: 50%;
  transform: translate(-50%, -8px);
  background: var(--ink);
  color: #fff;
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: 999px;
  box-shadow: 0 8px 24px rgba(26,10,16,.24);
  opacity: 0;
  pointer-events: none;
  transition: opacity .28s var(--ease-out), transform .28s var(--ease-out);
}
.calc-toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

/* ===== Why custom-fit explainer ===== */
.calc-why {
  background: var(--cream-warm);
  padding: 56px 0 72px;
}
@media (min-width: 720px) { .calc-why { padding: 80px 0 100px; } }
.calc-why h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 5vw, 44px);
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 0 0 14px;
  text-align: center;
  text-wrap: balance;
}
.calc-why p {
  font-family: var(--font-text);
  font-size: clamp(15px, 3.4vw, 18px);
  line-height: 1.75;
  color: var(--ink-soft);
  margin: 0 auto;
  max-width: 64ch;
  text-align: center;
  text-wrap: pretty;
}

/* Make sure the reveal animation actually fires on calc page (motion.js
   tracks .reveal). The shell starts hidden, fades in once visible. */