.calculator-page-shell {
  background:
    radial-gradient(circle at 12% 12%, color-mix(in srgb, var(--accent) 10%, transparent), transparent 28rem),
    var(--bg);
}

.calculator-nav {
  background: color-mix(in srgb, var(--bg) 74%, transparent);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(18px) saturate(135%);
  -webkit-backdrop-filter: blur(18px) saturate(135%);
}

.calculator-nav.is-scrolled { border-color: var(--glass-stroke); }
.nav__link[aria-current="page"] { background: color-mix(in srgb, var(--accent) 17%, transparent); color: var(--accent); }

.calculator-hero {
  position: relative;
  width: min(100% - 2rem, 900px);
  margin: 0 auto;
  padding: clamp(8.5rem, 17vh, 12rem) 0 clamp(3.5rem, 8vh, 6rem);
  text-align: center;
  isolation: isolate;
}

.calculator-hero__glow {
  position: absolute;
  z-index: -1;
  top: 3rem;
  left: 50%;
  width: min(90vw, 680px);
  aspect-ratio: 1;
  transform: translateX(-50%);
  border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--accent) 15%, transparent), transparent 66%);
  filter: blur(12px);
}

.calculator-hero__eyebrow {
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.calculator-hero h1 {
  margin-top: 1rem;
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 7vw, 5.25rem);
  line-height: 1.04;
  letter-spacing: -0.025em;
}

.calculator-hero h1 span { color: var(--accent); }
.calculator-hero > p:not(.calculator-hero__eyebrow) { max-width: 670px; margin: 1.35rem auto 0; color: var(--ink-soft); font-size: clamp(1rem, 2vw, 1.16rem); }

.calculator-hero__trust {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.65rem 1.4rem;
  margin-top: 2rem;
  color: var(--ink-soft);
  font-size: 0.86rem;
}

.calculator-hero__trust span::before { content: "✓"; margin-right: 0.42rem; color: var(--accent); font-weight: 700; }

.calculator-workspace {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(360px, 0.96fr);
  align-items: start;
  gap: 1.25rem;
  width: min(100% - 2rem, var(--maxw));
  margin: 0 auto;
}

.calculator-form,
.calculator-results {
  border-radius: 28px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.14);
}

.calculator-form { padding: clamp(1.35rem, 4vw, 2.5rem); }
.calculator-results { position: sticky; top: 6.5rem; overflow: hidden; padding: clamp(1.35rem, 4vw, 2.5rem); }
.calculator-results::before { content: ""; position: absolute; inset: 0 0 auto; height: 4px; background: linear-gradient(90deg, var(--accent), #d8ff69); }

.form-heading { display: flex; align-items: flex-start; gap: 1rem; }
.form-heading__number { display: grid; place-items: center; width: 2.4rem; height: 2.4rem; flex: 0 0 auto; border-radius: 50%; background: color-mix(in srgb, var(--accent) 15%, transparent); color: var(--accent); font-family: var(--font-display); font-weight: 600; }
.form-heading h2 { font-family: var(--font-display); font-size: clamp(1.3rem, 2.4vw, 1.65rem); }
.form-heading p { margin-top: 0.25rem; color: var(--ink-soft); font-size: 0.9rem; }
.form-divider { height: 1px; margin: 2.2rem 0; background: var(--glass-stroke); }

.field-group { margin-top: 1.6rem; padding: 0; border: 0; }
.field-group--compact { margin-top: 1.25rem; }
.field-group legend { margin-bottom: 0.7rem; color: var(--ink-soft); font-size: 0.85rem; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; }

.segmented-control { display: grid; gap: 0.65rem; }
.segmented-control--two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.segmented-control label,
.profile-options label {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 1rem;
  border: 1px solid var(--glass-stroke);
  border-radius: 16px;
  cursor: pointer;
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease), transform 0.25s var(--ease);
}

.segmented-control label:hover,
.profile-options label:hover { transform: translateY(-2px); }
.segmented-control label.is-active,
.profile-options label.is-active { border-color: color-mix(in srgb, var(--accent) 70%, transparent); background: color-mix(in srgb, var(--accent) 10%, transparent); }
.segmented-control input,
.profile-options input,
.mini-tabs input { position: absolute; opacity: 0; pointer-events: none; }
.segmented-control strong,
.profile-options strong { font-family: var(--font-display); font-size: 1rem; }
.segmented-control small,
.profile-options small { margin-top: 0.2rem; color: var(--ink-soft); font-size: 0.76rem; line-height: 1.45; }

.mini-tabs { display: inline-flex; gap: 0.3rem; padding: 0.3rem; border: 1px solid var(--glass-stroke); border-radius: 999px; }
.mini-tabs label { position: relative; padding: 0.42rem 0.9rem; border-radius: 999px; color: var(--ink-soft); cursor: pointer; font-size: 0.82rem; }
.mini-tabs label.is-active { background: var(--accent); color: #05210c; }

.number-field { display: block; margin-top: 1.2rem; }
.number-field > span:first-child { display: block; margin-bottom: 0.55rem; font-weight: 600; }
.number-field__input { display: flex; align-items: baseline; gap: 0.5rem; padding: 0.82rem 1rem; border: 1px solid var(--glass-stroke); border-radius: 15px; background: color-mix(in srgb, var(--bg-2) 60%, transparent); transition: border-color 0.2s; }
.number-field__input:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 12%, transparent); }
.number-field input { width: 100%; min-width: 0; border: 0; outline: 0; background: transparent; color: var(--ink); font: 600 1.45rem var(--font-display); }
.number-field__input b { color: var(--ink-soft); font-size: 0.85rem; white-space: nowrap; }
.number-field small { display: block; margin-top: 0.42rem; color: var(--ink-soft); font-size: 0.75rem; }
.number-field-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.75rem; }

.profile-options { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0.65rem; }
.profile-icon { display: grid; place-items: center; width: 2.4rem; height: 2.4rem; margin-bottom: 0.75rem; border-radius: 12px; background: color-mix(in srgb, var(--accent) 12%, transparent); color: var(--accent); font: 600 1.25rem var(--font-display); }

.advanced-settings { margin-top: 1.5rem; border-top: 1px solid var(--glass-stroke); border-bottom: 1px solid var(--glass-stroke); }
.advanced-settings summary { padding: 1rem 0; cursor: pointer; color: var(--ink-soft); font-size: 0.88rem; }
.check-field { display: flex; align-items: flex-start; gap: 0.75rem; padding: 0 0 1rem; cursor: pointer; }
.check-field input { width: 1.1rem; height: 1.1rem; margin-top: 0.22rem; accent-color: var(--accent); }
.check-field span { display: flex; flex-direction: column; }
.check-field small { margin-top: 0.2rem; color: var(--ink-soft); }

.calculate-button { display: flex; align-items: center; justify-content: space-between; width: 100%; margin-top: 1.5rem; padding: 0.9rem 1.15rem; border: 0; border-radius: 14px; background: var(--accent); color: #05210c; cursor: pointer; font: 600 1rem var(--font-sans); box-shadow: var(--glow); transition: transform 0.25s var(--ease); }
.calculate-button:hover { transform: translateY(-2px); }
.form-error { margin-top: 0.75rem; color: #ff8f8f; font-size: 0.85rem; }

.result-kicker { color: var(--ink-soft); font-size: 0.82rem; letter-spacing: 0.06em; }
.result-size { margin-top: 0.25rem; color: var(--accent); font: 700 clamp(2.5rem, 7vw, 4.6rem)/1 var(--font-display); letter-spacing: -0.04em; }
.result-context { margin-top: 0.7rem; color: var(--ink-soft); font-size: 0.86rem; }
.result-context strong { color: var(--ink); }

.result-highlight { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; overflow: hidden; margin-top: 1.6rem; border: 1px solid var(--glass-stroke); border-radius: 17px; background: var(--glass-stroke); }
.result-highlight > div { padding: 1rem; background: color-mix(in srgb, var(--bg-2) 84%, transparent); }
.result-highlight span,
.result-grid span { display: block; color: var(--ink-soft); font-size: 0.73rem; }
.result-highlight strong { display: block; margin-top: 0.3rem; font: 600 clamp(1rem, 2.4vw, 1.25rem) var(--font-display); }
.result-highlight > div:first-child strong { color: var(--accent); }

.result-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.7rem; margin-top: 0.8rem; }
.result-grid > div { min-width: 0; padding: 0.85rem; border-radius: 14px; background: color-mix(in srgb, var(--bg-2) 76%, transparent); }
.result-grid strong { display: block; margin-top: 0.3rem; font-size: 0.88rem; line-height: 1.4; }

.size-explorer { margin-top: 1.5rem; padding: 1rem; border: 1px solid var(--glass-stroke); border-radius: 16px; }
.size-explorer__head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; font-size: 0.86rem; }
.size-explorer output { color: var(--accent); font-weight: 600; }
.size-explorer input { width: 100%; margin-top: 1rem; accent-color: var(--accent); }
.size-explorer__scale { display: flex; justify-content: space-between; color: var(--ink-soft); font-size: 0.66rem; }

.result-advice { margin-top: 1.2rem; padding-left: 1rem; border-left: 2px solid var(--accent); }
.result-advice strong { font-size: 0.84rem; }
.result-advice p { margin-top: 0.28rem; color: var(--ink-soft); font-size: 0.8rem; line-height: 1.55; }
.night-system-note { display: flex; align-items: flex-start; gap: 0.8rem; margin-top: 1rem; padding: 1rem; border: 1px solid color-mix(in srgb, #f4b942 48%, var(--glass-stroke)); border-radius: 16px; background: color-mix(in srgb, #f4b942 9%, transparent); }
.night-system-note[hidden] { display: none; }
.night-system-note__icon { display: grid; place-items: center; width: 1.7rem; height: 1.7rem; flex: 0 0 auto; border-radius: 50%; background: #f4b942; color: #302000; font: 700 0.9rem var(--font-display); }
.night-system-note strong { display: block; font: 600 0.88rem var(--font-display); }
.night-system-note p { margin-top: 0.3rem; color: var(--ink-soft); font-size: 0.78rem; line-height: 1.55; }
.night-system-note a { display: inline-block; margin-top: 0.6rem; color: var(--accent); font-size: 0.8rem; font-weight: 600; }
.result-disclaimer { margin-top: 1.2rem; color: var(--ink-soft); font-size: 0.73rem; line-height: 1.55; }
.result-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 0.65rem; margin-top: 1.2rem; }
.result-primary,
.result-secondary { display: grid; place-items: center; min-height: 46px; padding: 0.65rem 0.8rem; border-radius: 12px; font: 600 0.86rem var(--font-sans); text-align: center; cursor: pointer; }
.result-primary { background: var(--accent); color: #05210c; }
.result-secondary { border: 1px solid var(--glass-stroke); background: transparent; color: var(--ink); }

.method-section { width: min(100% - 2rem, var(--maxw)); margin: clamp(5rem, 12vh, 9rem) auto 0; }
.method-section__intro { max-width: 680px; }
.method-section__intro h2 { margin-top: 0.55rem; font: 700 clamp(2rem, 5vw, 3.3rem) var(--font-display); }
.method-section__intro > p:last-child { margin-top: 0.8rem; color: var(--ink-soft); }
.method-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 2rem; }
.method-grid article { padding: clamp(1.2rem, 3vw, 1.7rem); border: 1px solid var(--glass-stroke); border-radius: 20px; background: color-mix(in srgb, var(--glass-bg) 80%, transparent); }
.method-grid article > span { color: var(--accent); font: 600 0.8rem var(--font-display); }
.method-grid h3 { margin-top: 0.8rem; font: 600 1.14rem var(--font-display); }
.method-grid p { margin-top: 0.55rem; color: var(--ink-soft); font-size: 0.88rem; line-height: 1.65; }
.source-panel { margin-top: 1rem; border: 1px solid var(--glass-stroke); border-radius: 20px; }
.source-panel summary { padding: 1rem 1.25rem; cursor: pointer; font-weight: 600; }
.source-panel__content { padding: 0 1.25rem 1.25rem; color: var(--ink-soft); font-size: 0.84rem; line-height: 1.65; }
.source-panel__content p + p { margin-top: 0.65rem; }
.source-panel__content strong { color: var(--ink); }
.source-links a { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }
.calculator-contact { margin-top: clamp(4rem, 10vh, 7rem); }

@media (max-width: 940px) {
  .calculator-workspace { grid-template-columns: 1fr; }
  .calculator-results { position: static; }
}

@media (max-width: 680px) {
  .calculator-nav .nav__pill { display: none; }
  .calculator-nav .nav__cta { padding-inline: 0.85rem; font-size: 0.82rem; }
  .calculator-nav .nav__logo img { height: 29px; }
  .calculator-hero { padding-top: 7.5rem; }
  .calculator-hero h1 { font-size: clamp(2.25rem, 12vw, 3.5rem); }
  .segmented-control--two,
  .number-field-grid,
  .profile-options,
  .method-grid { grid-template-columns: 1fr; }
  .profile-options label { display: grid; grid-template-columns: auto 1fr; column-gap: 0.8rem; }
  .profile-options .profile-icon { grid-row: 1 / span 2; margin: 0; }
  .result-grid { grid-template-columns: 1fr; }
}

@media (max-width: 420px) {
  .calculator-hero__trust { align-items: flex-start; flex-direction: column; width: max-content; margin-inline: auto; }
  .result-highlight,
  .result-actions { grid-template-columns: 1fr; }
}