.calc-hero { position: relative; min-height: min(680px, 76vh); overflow: hidden; color: #fff; background: var(--navy); }
.calc-hero > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center 54%; }
.calc-hero__shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(0,31,81,.98) 0%, rgba(0,31,81,.83) 34%, rgba(0,31,81,.18) 68%, rgba(0,31,81,.08) 100%); }
.calc-hero__copy { position: relative; z-index: 1; display: flex; min-height: min(680px, 76vh); flex-direction: column; align-items: flex-start; justify-content: center; padding-block: 72px; }
.calc-hero h1 { max-width: 750px; margin: 14px 0 24px; font-size: clamp(3.2rem, 5vw, 5.4rem); line-height: .93; letter-spacing: -.065em; }
.calc-hero__copy > p:not(.eyebrow) { max-width: 600px; margin: 0 0 34px; color: rgba(255,255,255,.82); font-size: clamp(1.04rem, 1.55vw, 1.28rem); line-height: 1.55; }

.calc-catalog { padding-block: clamp(84px, 10vw, 148px); }
.calc-heading { display: grid; grid-template-columns: minmax(0, 1fr) minmax(290px, 480px); gap: 64px; align-items: end; margin-bottom: 54px; }
.calc-heading h2 { max-width: 790px; margin: 11px 0 0; font-size: clamp(2.8rem, 4.6vw, 4.8rem); line-height: .96; letter-spacing: -.06em; }
.calc-heading > p { margin: 0; color: var(--muted); line-height: 1.65; }
.calculator-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); }
.calculator-card { display: flex; min-width: 0; min-height: 390px; flex-direction: column; padding: 28px 26px 30px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.calculator-card:nth-child(3n + 1) { border-left: 1px solid var(--line); }
.calculator-card[hidden] { display: none; }
.calculator-card--featured { color: var(--navy); background: var(--blue); }
.calculator-card--featured .meta, .calculator-card--featured > p:not(.meta) { color: var(--navy); }
.calculator-card__index { margin-bottom: auto; font-size: .75rem; font-weight: 800; letter-spacing: .12em; }
.calculator-card .meta { margin-top: 48px; }
.calculator-card h3 { margin: 10px 0 14px; font-size: clamp(1.7rem, 2.2vw, 2.55rem); line-height: 1.02; letter-spacing: -.045em; overflow-wrap: anywhere; }
.calculator-card > p:not(.meta) { margin: 0 0 28px; color: var(--muted); line-height: 1.55; }
.calculator-card > a { margin-top: auto; padding-top: 10px; font-size: .88rem; font-weight: 780; text-decoration: none; }
.calculator-card > a:hover { opacity: .65; }
.calc-catalog__note { display: flex; justify-content: space-between; gap: 20px; margin: 24px 0 0; color: var(--muted); font-size: .82rem; }
.calc-catalog__note a { color: var(--ink); font-weight: 750; }
.calc-gate { color: #fff; background: var(--navy); }
.calc-gate__inner { display: grid; grid-template-columns: minmax(0, 1fr) minmax(320px, .75fr); gap: 90px; align-items: end; padding-block: clamp(72px, 9vw, 126px); }
.calc-gate h2 { max-width: 720px; margin: 12px 0 0; font-size: clamp(2.8rem, 4.7vw, 5rem); line-height: .96; letter-spacing: -.06em; }
.calc-gate__inner > p { margin: 0; color: rgba(255,255,255,.72); line-height: 1.7; }

.calc-breadcrumb { display: flex; min-height: 64px; gap: 10px; align-items: center; color: var(--muted); font-size: .82rem; }
.calc-breadcrumb a { text-decoration: none; }
.tool-intro { display: grid; grid-template-columns: minmax(0, 1fr) minmax(320px, .6fr); gap: 70px; align-items: end; padding-block: clamp(62px, 8vw, 108px); }
.tool-intro h1 { max-width: 880px; margin: 12px 0 0; font-size: clamp(3.2rem, 5.2vw, 5.5rem); line-height: .93; letter-spacing: -.065em; overflow-wrap: anywhere; hyphens: auto; }
.tool-intro__copy > p { margin: 0 0 24px; color: #3d3d3d; font-size: 1.08rem; line-height: 1.65; }
.tool-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tool-tags span { padding: 7px 11px; border: 1px solid var(--line); font-size: .75rem; font-weight: 740; }
.calculator-workspace { padding-block: clamp(54px, 7vw, 94px); background: var(--paper); }
.calculator-workspace__grid { display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(350px, .72fr); gap: 24px; align-items: start; }
.calc-panel { padding: clamp(28px, 4vw, 48px); border-top: 4px solid var(--blue); background: #fff; }
.calc-panel__heading h2 { margin: 9px 0 10px; font-size: clamp(2rem, 3vw, 3.15rem); letter-spacing: -.05em; }
.calc-panel__heading p { margin: 0 0 28px; color: var(--muted); }
.mode-tabs { display: grid; grid-template-columns: 1fr 1fr; margin-bottom: 30px; border: 1px solid var(--line); }
.mode-tabs button { min-height: 50px; padding: 8px 14px; border: 0; color: var(--ink); background: transparent; font: inherit; font-weight: 750; cursor: pointer; }
.mode-tabs button[aria-selected="true"] { color: #fff; background: var(--navy); }
.calc-form fieldset { margin: 0 0 26px; padding: 0; border: 0; }
.calc-form legend { width: 100%; margin-bottom: 16px; padding-bottom: 10px; border-bottom: 1px solid var(--line); font-weight: 800; }
.field-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.field-grid--two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.calc-form label { min-width: 0; color: #4a4a4a; font-size: .8rem; font-weight: 700; }
.calc-form input { width: 100%; min-height: 48px; margin-top: 7px; padding: 0 13px; border: 1px solid #bdbdbd; border-radius: 0; color: var(--ink); background: #fff; font: inherit; }
.field-hint { margin: 10px 0 0; color: var(--muted); font-size: .76rem; }
.calc-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 30px; }
.calc-actions .button { border: 0; cursor: pointer; }
.button--quiet { border: 1px solid var(--ink) !important; color: var(--ink); background: transparent; }
.calc-alert { margin: 0 0 20px; padding: 14px 16px; border-left: 4px solid #b42318; color: #7a271a; background: #fef3f2; line-height: 1.45; }
.calc-results { position: sticky; top: 24px; padding: clamp(28px, 4vw, 44px); color: #fff; background: var(--navy); }
.calc-results__status { margin: 0 0 26px; color: var(--sky); font-size: .75rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.result-primary { padding-bottom: 28px; border-bottom: 1px solid rgba(255,255,255,.22); }
.result-primary span, .result-list dt { color: rgba(255,255,255,.62); font-size: .75rem; font-weight: 750; letter-spacing: .06em; text-transform: uppercase; }
.result-primary strong { display: block; margin-top: 9px; font-size: clamp(3.6rem, 7vw, 6.8rem); line-height: .86; letter-spacing: -.07em; }
.result-primary small { color: rgba(255,255,255,.7); }
.result-list { margin: 0; }
.result-list div { padding: 20px 0; border-bottom: 1px solid rgba(255,255,255,.18); }
.result-list dd { margin: 7px 0 0; font-size: 1.2rem; font-weight: 730; overflow-wrap: anywhere; }
.calc-results__note { margin: 24px 0 0; color: rgba(255,255,255,.6); font-size: .76rem; line-height: 1.55; }
.tool-content { display: grid; grid-template-columns: minmax(0, 1fr) minmax(250px, .38fr); gap: clamp(60px, 9vw, 130px); padding-block: clamp(78px, 10vw, 140px); }
.tool-content article > * { max-width: 760px; }
.tool-content h2 { margin: 0 0 22px; font-size: clamp(2.3rem, 3.7vw, 3.9rem); letter-spacing: -.05em; }
.tool-content h3 { margin: 42px 0 12px; font-size: 1.5rem; }
.tool-content p, .tool-content li { color: #414141; line-height: 1.75; }
.tool-content aside { padding: 28px; border-top: 3px solid var(--blue); background: var(--paper); }
.tool-content aside strong { display: block; margin-bottom: 12px; }
.tool-content aside p { margin: 0; font-size: .88rem; }

.result-caption { margin: 10px 0 0; color: rgba(255,255,255,.6); font-size: .78rem; line-height: 1.5; }
.result-unit { margin-top: 5px !important; color: rgba(255,255,255,.55); font-size: .74rem !important; font-weight: 500 !important; }
.tool-toc { align-self: start; position: sticky; top: 24px; padding: 24px; border-top: 3px solid var(--blue); background: var(--paper); }
.tool-toc strong { display: block; margin-bottom: 12px; font-size: .82rem; letter-spacing: .06em; text-transform: uppercase; }
.tool-toc ul { margin: 0; padding: 0; list-style: none; }
.tool-toc li + li { margin-top: 8px; }
.tool-toc a { font-size: .88rem; font-weight: 650; text-decoration: none; }
.tool-toc a:hover { opacity: .65; }
.formula { padding: 16px 20px; border-left: 3px solid var(--blue); background: var(--paper); }
.formula code { font-size: 1.05rem; }
.table-wrap { max-width: 760px; overflow-x: auto; touch-action: pan-x pan-y; }
.table-wrap table { width: 100%; border-collapse: collapse; font-size: .92rem; }
.table-wrap th, .table-wrap td { padding: 10px 14px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.table-wrap th { font-weight: 750; }
.author-card { display: grid; grid-template-columns: 140px minmax(0, 1fr); gap: 28px; align-items: start; max-width: 760px; margin-top: 54px; padding: 28px; border-top: 3px solid var(--blue); background: var(--paper); }
.author-card img { width: 140px; height: auto; }
.author-card__label { margin: 0 0 6px; color: var(--muted); font-size: .78rem; font-weight: 750; text-transform: uppercase; letter-spacing: .06em; }
.author-card h3 { margin: 0 0 4px; }
.author-card__crm { margin: 0 0 16px; color: var(--muted); font-size: .85rem; }
.author-card p:last-child { margin-bottom: 0; }

@media (max-width: 1024px) {
  .calculator-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .calculator-card:nth-child(3n + 1) { border-left: 0; }
  .calculator-card:nth-child(2n + 1) { border-left: 1px solid var(--line); }
  .calculator-workspace__grid { grid-template-columns: 1fr; }
  .calc-results { position: static; }
}
@media (max-width: 767px) {
  .calc-hero, .calc-hero__copy { min-height: 620px; }
  .calc-hero > img { object-position: 66% center; }
  .calc-hero__shade { background: linear-gradient(90deg, rgba(0,31,81,.92), rgba(0,31,81,.42)), linear-gradient(0deg, rgba(0,31,81,.76), transparent); }
  .calc-hero h1 { max-width: 11ch; font-size: clamp(3.1rem, 14vw, 4.6rem); }
  .calc-heading, .calc-gate__inner, .tool-intro, .tool-content { grid-template-columns: minmax(0, 1fr); }
  .calc-heading, .calc-gate__inner, .tool-intro { gap: 30px; }
  .calculator-grid { grid-template-columns: 1fr; }
  .calculator-card, .calculator-card:nth-child(3n + 1), .calculator-card:nth-child(2n + 1) { min-height: 330px; border-left: 1px solid var(--line); }
  .calc-catalog__note { flex-direction: column; }
  .calc-breadcrumb { overflow-x: auto; white-space: nowrap; touch-action: pan-x pan-y; }
  .tool-intro h1 { font-size: clamp(3rem, 13vw, 4.5rem); }
  .calculator-workspace__grid { width: 100%; }
  .calc-panel, .calc-results { padding: 28px 20px; }
  .field-grid, .field-grid--two { grid-template-columns: 1fr; }
  .tool-content { gap: 48px; }
  .tool-toc { position: static; }
  .author-card { grid-template-columns: 1fr; }
}
@media (max-width: 390px) {
  .mode-tabs { grid-template-columns: 1fr; }
  .calc-actions { flex-direction: column; }
  .calc-actions .button { justify-content: center; width: 100%; }
}

@media (max-width: 1100px) { .author-card { grid-template-columns: 1fr; } }