/* ================================================
   TOKENS — Sogroya Brand Palette
   ================================================ */
:root {
  --nn-navy:     oklch(36% 0.135 308);
  --nn-blue:     oklch(52% 0.12 217);
  --nn-blue-lt:  oklch(95% 0.03 217);
  --bg:          oklch(98% 0.003 250);
  --surface:     oklch(100% 0 0);
  --fg:          oklch(16% 0.018 252);
  --muted:       oklch(52% 0.014 252);
  --border:      oklch(88% 0.008 252);
  --result-bg:   oklch(95.5% 0.025 217);
  --result-border: oklch(84% 0.05 217);
  --warn-bg:     oklch(97% 0.04 60);
  --warn-border: oklch(85% 0.08 60);
  --warn-fg:     oklch(40% 0.14 60);
  --success-fg:  oklch(35% 0.12 145);
  --font-sans:   -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', system-ui, sans-serif;
  --font-mono:   'JetBrains Mono', 'IBM Plex Mono', ui-monospace, Menlo, monospace;
  --r:           6px;
  --r-lg:        10px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-text-size-adjust: 100%; }
body { font-family: var(--font-sans); background: var(--bg); color: var(--fg); line-height: 1.6; min-height: 100vh; word-break: keep-all; }
a { text-decoration: none; color: inherit; }
button { font-family: inherit; }
sup { font-size: 0.7em; vertical-align: super; line-height: 1; }

/* GATE */
.gate-overlay { position: fixed; inset: 0; z-index: 2000; background: #dec3f8 url("gate-bg.png") center center / cover no-repeat; display: flex; align-items: center; justify-content: center; gap: clamp(24px,4vw,110px); padding: 24px; overflow: hidden; }
.gate-overlay.hidden { display: none; }
.gate-illust { flex: 0 1 auto; height: min(92vh,860px); width: auto; max-width: 52vw; object-fit: contain; pointer-events: none; user-select: none; }
.gate-card { flex: 0 0 auto; position: relative; z-index: 1; background: var(--surface); border-radius: var(--r-lg); padding: clamp(32px,5vw,52px) clamp(28px,5vw,48px); width: min(460px,100%); box-shadow: 0 20px 60px oklch(36% 0.135 308 / 0.22); }
.gate-overline { font-size: 11px; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; font-family: var(--font-mono); color: var(--muted); margin-bottom: 10px; }
.gate-brand { font-size: clamp(20px,4vw,26px); font-weight: 700; color: oklch(45% 0.10 308); letter-spacing: -0.02em; margin-bottom: 24px; line-height: 1.2; }
.gate-brand em { color: var(--nn-blue); font-style: normal; }
.gate-divider { height: 1px; background: var(--border); margin-bottom: 24px; }
.gate-q { font-size: 17px; font-weight: 600; color: oklch(42% 0.02 252); margin-bottom: 6px; }
.gate-sub { font-size: 13px; color: var(--muted); line-height: 1.55; margin-bottom: 24px; }
.gate-note { margin-top: 16px; margin-bottom: 0; }
.gate-btns { display: flex; gap: 10px; }
.btn-yes { flex: 1; padding: 13px 16px; background: var(--nn-navy); color: #fff; border: none; border-radius: var(--r); font-size: 14px; font-weight: 600; cursor: pointer; transition: background 0.15s; }
.btn-yes:hover { background: var(--nn-blue); }
.btn-no  { flex: 1; padding: 13px 16px; background: transparent; color: var(--fg); border: 1.5px solid var(--border); border-radius: var(--r); font-size: 14px; font-weight: 500; cursor: pointer; transition: border-color 0.15s, color 0.15s; }
.btn-no:hover  { border-color: var(--nn-blue); color: var(--nn-blue); }
.gate-reject { display: none; background: var(--warn-bg); border: 1px solid var(--warn-border); border-radius: var(--r); padding: 12px 14px; color: var(--warn-fg); font-size: 13px; line-height: 1.55; margin-top: 14px; }
.gate-reject.show { display: block; }

/* APP SHELL */
#app { display: flex; flex-direction: column; min-height: 100vh; }
#app.hidden { display: none; }
.hcp-banner { background: var(--nn-navy); color: #fff; font-size: 12px; text-align: center; padding: 7px 20px; line-height: 1.4; letter-spacing: 0.01em; overflow-wrap: break-word; }

/* NAV */
.topnav { background: var(--surface); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100; }
.topnav-inner { max-width: 1280px; margin: 0 auto; padding: 0 28px; height: 70px; display: flex; align-items: center; }
.nav-brand { font-size: 16px; font-weight: 700; color: var(--nn-navy); letter-spacing: -0.01em; margin-right: 38px; white-space: nowrap; cursor: pointer; background: none; border: none; }
.nav-brand em { color: var(--nn-blue); font-style: normal; }
.nav-links { display: flex; gap: 4px; flex: 1; list-style: none; }
.nav-links button { background: none; border: none; cursor: pointer; padding: 9px 15px; border-radius: var(--r); font-size: 15px; font-weight: 500; color: var(--muted); transition: color 0.15s, background 0.15s; white-space: nowrap; }
.nav-links button:hover { color: var(--fg); background: var(--bg); }
.nav-links button.active { color: var(--nn-navy); font-weight: 600; background: var(--nn-blue-lt); }
.nav-right { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.btn-lang { display: inline-flex; align-items: center; gap: 6px; background: none; border: 1.5px solid var(--border); border-radius: 20px; padding: 7px 15px; font-size: 14px; cursor: pointer; color: var(--muted); transition: border-color 0.15s, color 0.15s; white-space: nowrap; }
.btn-lang svg { flex-shrink: 0; }
.btn-lang:hover { border-color: var(--nn-blue); color: var(--fg); }
.nav-hamburger { display: none; background: none; border: none; cursor: pointer; padding: 8px; color: var(--fg); }
.nav-mobile-menu { display: none; background: var(--surface); border-top: 1px solid var(--border); padding: 10px 20px 14px; }
.nav-mobile-menu.open { display: block; }
.nav-mobile-menu button { display: block; width: 100%; text-align: left; background: none; border: none; cursor: pointer; padding: 9px 10px; border-radius: var(--r); font-size: 15px; font-weight: 500; color: var(--muted); }
.nav-mobile-menu button.active { color: var(--nn-navy); font-weight: 600; }

/* PAGES */
main { flex: 1; }
.page { display: none; }
.page.active { display: block; }

/* HOME */
.home-hero { background: #dec3f8 url("hero-bg.png") center center / cover no-repeat; display: flex; align-items: center; justify-content: center; gap: clamp(24px,4vw,90px); padding: clamp(8px,1.5vw,20px) clamp(24px,6vw,90px); text-align: left; }
.hero-text { flex: 1 1 auto; max-width: 640px; }
.hero-illust { flex: 0 0 auto; width: clamp(200px,20vw,310px); height: auto; pointer-events: none; user-select: none; }
.hero-eyebrow { font-size: 14px; letter-spacing: 0.01em; color: oklch(42% 0.05 308); font-weight: 500; margin-bottom: 18px; line-height: 1.55; max-width: 640px; }
.hero-subtitle { color: oklch(48% 0.13 308); }
.hero-title { font-size: clamp(30px,5.5vw,52px); font-weight: 700; color: var(--nn-navy); letter-spacing: -0.025em; line-height: 1.08; }
.hero-title em { color: var(--nn-blue); font-style: normal; }
.calc-cards { max-width: 1100px; margin: 0 auto; padding: clamp(32px,5vw,56px) 24px; display: grid; grid-template-columns: repeat(auto-fit,minmax(290px,1fr)); gap: 18px; }
.calc-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-lg); padding: 26px; cursor: pointer; transition: border-color 0.15s, box-shadow 0.15s, transform 0.15s; }
.calc-card:hover { border-color: var(--nn-blue); box-shadow: 0 4px 18px oklch(26% 0.13 308 / 0.10); transform: translateY(-2px); }
.card-badge { display: inline-block; margin-bottom: 14px; font-size: 11px; font-weight: 700; letter-spacing: 0.09em; text-transform: uppercase; font-family: var(--font-mono); color: var(--nn-blue); background: var(--nn-blue-lt); padding: 3px 8px; border-radius: 4px; }
.card-icon { font-size: 32px; line-height: 1; margin-bottom: 14px; }
.card-title { font-size: 17px; font-weight: 700; color: var(--nn-navy); letter-spacing: -0.01em; margin-bottom: 8px; }
.card-desc { font-size: 13px; color: var(--muted); line-height: 1.6; margin-bottom: 18px; }
.card-cta { font-size: 13px; font-weight: 600; color: var(--nn-blue); display: flex; align-items: center; gap: 6px; }
.card-cta::after { content: '→'; display: inline-block; transition: transform 0.15s; }
.calc-card:hover .card-cta::after { transform: translateX(4px); }

/* CALC LAYOUT */
.calc-page { max-width: 1180px; margin: 0 auto; padding: clamp(24px,4vw,40px) 24px clamp(24px,4vw,40px); }
.calc-hdr { margin-bottom: 28px; padding-bottom: 20px; border-bottom: 1px solid var(--border); }
.calc-hdr-eyebrow { font-size: 11px; font-weight: 700; letter-spacing: 0.10em; text-transform: uppercase; font-family: var(--font-mono); color: var(--nn-blue); margin-bottom: 6px; }
.calc-hdr h1 { font-size: clamp(20px,3vw,28px); font-weight: 700; color: var(--nn-navy); letter-spacing: -0.02em; }
.calc-subtitle { font-size: 15px; font-weight: 600; color: var(--fg); margin-top: 5px; margin-bottom: 4px; }
.calc-hdr-desc { font-size: 13px; color: var(--muted); margin-top: 5px; line-height: 1.55; }
.calc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; align-items: start; }

/* INPUT PANEL */
.input-panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-lg); padding: 22px; }
.panel-label { font-size: 15px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; font-family: var(--font-mono); color: var(--muted); margin-bottom: 18px; }
.tab-group { display: flex; background: var(--bg); border: 1px solid var(--border); border-radius: var(--r); padding: 3px; margin-bottom: 22px; }
.tab-btn { flex: 1; padding: 8px 14px; border: none; background: none; border-radius: calc(var(--r) - 2px); font-size: 13px; font-weight: 500; cursor: pointer; color: var(--muted); transition: all 0.13s; }
.tab-btn.active { background: var(--nn-navy); color: #fff; font-weight: 600; }
.f { margin-bottom: 16px; }
.f-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.f label { display: block; font-size: 13px; font-weight: 600; color: var(--fg); margin-bottom: 5px; }
.f-sub { font-size: 11px; font-weight: 400; color: var(--muted); font-family: var(--font-mono); margin-left: 5px; }
.f input[type="number"], .f input[type="text"], .f select {
  width: 100%; padding: 9px 11px; border: 1.5px solid var(--border); border-radius: var(--r);
  font-size: 14px; color: var(--fg); background: var(--surface);
  font-family: var(--font-mono); font-variant-numeric: tabular-nums;
  transition: border-color 0.15s; outline: none; -moz-appearance: textfield;
}
.f input::-webkit-outer-spin-button, .f input::-webkit-inner-spin-button { -webkit-appearance: none; }
.f input:focus, .f select:focus { border-color: var(--nn-blue); box-shadow: 0 0 0 3px oklch(52% 0.12 217 / 0.12); }
.f select { appearance: none; cursor: pointer; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='7' viewBox='0 0 12 7'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%238b93a5' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 11px center; padding-right: 30px; }
.f-hint { font-size: 11px; color: var(--muted); margin-top: 4px; font-family: var(--font-mono); }
.time-row { display: flex; gap: 8px; align-items: center; }
.time-input { flex: 1; padding: 9px 11px; border: 1.5px solid var(--border); border-radius: var(--r); font-size: 14px; color: var(--fg); background: var(--surface); font-family: var(--font-mono); font-variant-numeric: tabular-nums; outline: none; -moz-appearance: textfield; transition: border-color 0.15s; }
.time-input::-webkit-outer-spin-button, .time-input::-webkit-inner-spin-button { -webkit-appearance: none; }
.time-input:focus { border-color: var(--nn-blue); box-shadow: 0 0 0 3px oklch(52% 0.12 217 / 0.12); }
/* locale-aware datetime picker */
.dt-wrapper { display: flex; align-items: center; flex-wrap: nowrap; gap: 1px; border: 1.5px solid var(--border); border-radius: var(--r); background: var(--surface); padding: 3px 8px; transition: border-color 0.15s; cursor: text; }
.dt-wrapper:focus-within { border-color: var(--nn-blue); box-shadow: 0 0 0 3px oklch(52% 0.12 217 / 0.12); }
.dt-f { border: none; outline: none; background: transparent; font-size: 14px; color: var(--fg); font-family: var(--font-mono); font-variant-numeric: tabular-nums; padding: 5px 2px; text-align: center; -moz-appearance: textfield; }
.dt-f::-webkit-inner-spin-button, .dt-f::-webkit-outer-spin-button { -webkit-appearance: none; display: none; }
.dt-f::placeholder { color: var(--muted); }
.dt-year { width: 48px; }
.dt-2d { width: 28px; }
.dt-sep { color: var(--muted); font-size: 13px; padding: 0 2px; user-select: none; pointer-events: none; line-height: 1; }
.dt-picker-row { display: flex; align-items: center; gap: 6px; width: 100%; }
.dt-picker-row .dt-wrapper { flex: 1; min-width: 0; }
.cal-btn { display: inline-flex; align-items: center; justify-content: center; width: 34px; height: 34px; border: 1.5px solid var(--border); border-radius: var(--r); background: var(--surface); cursor: pointer; color: var(--muted); transition: border-color 0.15s, color 0.15s; flex-shrink: 0; }
.cal-btn:hover { border-color: var(--nn-blue); color: var(--nn-blue); }
/* KO: yyyy/mm/dd hh:mm */
.lang-ko #dt-y{order:1;} .lang-ko .dt-sep-ym{order:2;} .lang-ko #dt-mo{order:3;} .lang-ko .dt-sep-md{order:4;}
.lang-ko #dt-d{order:5;} .lang-ko .dt-sep-dt{order:6;} .lang-ko #dt-h{order:8;} .lang-ko .dt-sep-hm{order:9;} .lang-ko #dt-mi{order:10;}
/* EN: mm/dd/yyyy hh:mm */
.lang-en #dt-mo{order:1;} .lang-en .dt-sep-ym{order:2;} .lang-en #dt-d{order:3;} .lang-en .dt-sep-md{order:4;}
.lang-en #dt-y{order:5;} .lang-en .dt-sep-dt{order:6;} .lang-en #dt-h{order:7;} .lang-en .dt-sep-hm{order:8;} .lang-en #dt-mi{order:9;}
.lang-ko #ig-y{order:1;} .lang-ko #ig-mo{order:3;} .lang-ko #ig-d{order:5;} .lang-ko #ig-h{order:8;} .lang-ko #ig-mi{order:10;}
.lang-en #ig-mo{order:1;} .lang-en #ig-d{order:3;} .lang-en #ig-y{order:5;} .lang-en #ig-h{order:7;} .lang-en #ig-mi{order:9;}
.lang-ko #igd-y{order:1;} .lang-ko #igd-mo{order:3;} .lang-ko #igd-d{order:5;} .lang-ko #igd-h{order:8;} .lang-ko #igd-mi{order:10;}
.lang-en #igd-mo{order:1;} .lang-en #igd-d{order:3;} .lang-en #igd-y{order:5;} .lang-en #igd-h{order:7;} .lang-en #igd-mi{order:9;}
/* flatpickr brand overrides */
.flatpickr-calendar { font-family: var(--font-sans); border: 1px solid var(--border); border-radius: var(--r-lg); box-shadow: 0 8px 32px oklch(26% 0.13 308 / 0.14); }
.flatpickr-calendar * { font-family: var(--font-sans); }
.flatpickr-months .flatpickr-month { background: var(--nn-navy); border-radius: var(--r-lg) var(--r-lg) 0 0; }
.flatpickr-months .flatpickr-prev-month, .flatpickr-months .flatpickr-next-month { color: #fff; fill: #fff; }
.flatpickr-months .flatpickr-prev-month:hover svg path, .flatpickr-months .flatpickr-next-month:hover svg path { fill: oklch(72% 0.10 217); }
.flatpickr-current-month { color: #fff; }
.flatpickr-current-month input.cur-year { color: #fff; }
.flatpickr-current-month .numInputWrapper span { border-color: rgba(255,255,255,0.4); }
.flatpickr-current-month .numInputWrapper span.arrowUp::after { border-bottom-color: #fff; }
.flatpickr-current-month .numInputWrapper span.arrowDown::after { border-top-color: #fff; }
.flatpickr-current-month select.flatpickr-monthDropdown-months { -webkit-appearance:none; appearance:none; background:transparent; color:#fff; border:none; cursor:pointer; }
.flatpickr-current-month select.flatpickr-monthDropdown-months option { color: var(--fg); background: var(--surface); }
.flatpickr-weekdays { background: var(--nn-blue-lt); }
span.flatpickr-weekday { color: var(--nn-blue); font-weight: 700; font-size: 12px; background: var(--nn-blue-lt); }
.flatpickr-day:hover { background: var(--nn-blue-lt); border-color: var(--nn-blue-lt); }
.flatpickr-day.selected, .flatpickr-day.selected:hover { background: var(--nn-navy); border-color: var(--nn-navy); }
.flatpickr-day.today { border-color: var(--nn-blue); }
.flatpickr-day.today:hover { background: var(--nn-blue-lt); }
.flatpickr-time { border-top: 1px solid var(--border); }
.flatpickr-time input:hover, .flatpickr-time input:focus, .flatpickr-time .flatpickr-am-pm:hover, .flatpickr-time .flatpickr-am-pm:focus { background: var(--nn-blue-lt); }
.unit-toggle { display: flex; background: var(--bg); border: 1px solid var(--border); border-radius: var(--r); padding: 2px; flex-shrink: 0; }
.unit-btn { padding: 5px 11px; border: none; background: none; border-radius: calc(var(--r) - 2px); font-size: 12px; cursor: pointer; color: var(--muted); font-family: var(--font-mono); transition: all 0.12s; }
.unit-btn.active { background: var(--nn-navy); color: #fff; }
.igf1-val-input { width: 100%; padding: 9px 11px; border: 1.5px solid var(--border); border-radius: var(--r); font-size: 14px; color: var(--fg); background: var(--surface); font-family: var(--font-mono); font-variant-numeric: tabular-nums; outline: none; -moz-appearance: textfield; transition: border-color 0.15s; }
.igf1-val-input::-webkit-outer-spin-button, .igf1-val-input::-webkit-inner-spin-button { -webkit-appearance: none; }
.igf1-val-input:focus { border-color: var(--nn-blue); box-shadow: 0 0 0 3px oklch(52% 0.12 217 / 0.12); }
.btn-link { background: none; border: none; cursor: pointer; padding: 0; color: var(--nn-blue); font-size: 12px; font-weight: 500; text-decoration: underline; text-underline-offset: 2px; margin-top: 6px; display: inline-block; }
.btn-link:hover { color: var(--nn-navy); }

/* RESULT PANEL */
.result-panel { background: var(--result-bg); border: 1px solid var(--result-border); border-radius: var(--r-lg); padding: 22px; position: sticky; top: 74px; }
.result-label-top { font-size: 15px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; font-family: var(--font-mono); color: var(--nn-blue); margin-bottom: 18px; }
.r-item { margin-bottom: 18px; padding-bottom: 18px; border-bottom: 1px solid oklch(87% 0.04 217); }
.r-item:last-child { margin-bottom: 0; padding-bottom: 0; border-bottom: none; }
.r-lbl { font-size: 11px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: 0.06em; font-family: var(--font-mono); margin-bottom: 3px; }
.r-val { font-size: clamp(22px,3.5vw,30px); font-weight: 700; color: var(--nn-navy); letter-spacing: -0.02em; font-variant-numeric: tabular-nums; font-family: var(--font-mono); line-height: 1.1; white-space: nowrap; }
.r-unit { font-size: 14px; font-weight: 500; color: var(--muted); margin-left: 3px; }
.r-note { font-size: 11px; color: var(--muted); margin-top: 3px; line-height: 1.4; }
.r-sub { font-size: 13px; font-weight: 500; color: var(--fg); margin-top: 3px; }
.r-empty { text-align: center; padding: 36px 16px; color: var(--muted); font-size: 13px; line-height: 1.7; }
.tit-box { background: var(--nn-blue-lt); border: 1px solid oklch(80% 0.06 217); border-radius: var(--r); padding: 13px 15px; margin-top: 18px; }
.tit-box-title { font-size: 15px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; font-family: var(--font-mono); color: var(--nn-blue); margin-bottom: 18px; }
.tit-box p { font-size: 12px; color: var(--fg); line-height: 1.6; }
.warn-box { background: var(--warn-bg); border: 1px solid var(--warn-border); border-radius: var(--r); padding: 11px 14px; font-size: 12px; color: var(--warn-fg); line-height: 1.55; margin-top: 10px; }
.timing-range { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 8px; }

/* FOOTNOTE SECTIONS */
.fn-section { max-width: 1180px; margin: 0 auto; padding: 16px 24px 32px; border-top: 1px solid var(--border); }
.fn-text { font-size: 11px; color: var(--muted); line-height: 1.75; }
.fn-text + .fn-text { margin-top: 2px; }
.ref-section { max-width: 1180px; margin: 0 auto; padding: 16px 24px 32px; border-top: 1px solid var(--border); }
.ref-text { font-size: 11px; color: var(--muted); line-height: 1.65; }

/* MODAL */
.modal-bg { position: fixed; inset: 0; z-index: 500; background: oklch(0% 0 0 / 0.42); display: flex; align-items: center; justify-content: center; padding: 24px; }
.modal-bg.hidden { display: none; }
.modal-box { background: var(--surface); border-radius: var(--r-lg); width: 100%; max-width: 680px; max-height: 82vh; overflow-y: auto; box-shadow: 0 20px 60px oklch(0% 0 0 / 0.18), 0 4px 18px oklch(0% 0 0 / 0.08); }
.modal-hdr { position: sticky; top: 0; background: var(--surface); padding: 18px 22px 14px; border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; }
.modal-title { font-size: 15px; font-weight: 700; color: var(--nn-navy); }
.modal-close { background: none; border: none; cursor: pointer; font-size: 18px; color: var(--muted); padding: 4px; line-height: 1; }
.modal-body { padding: 18px 22px 22px; }
.tbl { width: 100%; border-collapse: collapse; font-size: 13px; }
.tbl th { text-align: left; padding: 7px 10px; background: var(--bg); border-bottom: 1.5px solid var(--border); font-size: 10px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; font-family: var(--font-mono); color: var(--muted); }
.tbl td { padding: 9px 10px; border-bottom: 1px solid var(--border); font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.tbl tr:last-child td { border-bottom: none; }
.tbl tr.row-active td { background: var(--nn-blue-lt); font-weight: 600; }
.tbl tr.row-base td { color: var(--success-fg); font-weight: 600; }
.tbl-scroll { overflow-x: auto; }
.tbl-scroll .tbl { min-width: 460px; }

/* FOOTER */
footer { background: oklch(22% 0.10 308); color: oklch(70% 0.04 308); padding: clamp(28px,4vw,44px) 24px; margin-top: auto; }
.footer-inner { max-width: 1200px; margin: 0 auto; }
.footer-brand { font-size: 13px; font-weight: 700; color: #fff; margin-bottom: 12px; }
.footer-divider { height: 1px; background: oklch(32% 0.09 308); margin: 14px 0; }
.footer-legal { font-size: 11.5px; line-height: 1.75; color: oklch(72% 0.03 308); }
.footer-legal p { margin-bottom: 4px; }
.footer-legal p:last-child { margin-bottom: 0; }
.footer-contact { font-size: 11.5px; color: oklch(72% 0.03 308); line-height: 1.75; margin-top: 4px; }
.footer-product { margin-top: 12px; }
.footer-product-title { font-size: 11px; font-weight: 700; color: oklch(80% 0.04 308); margin-bottom: 4px; }
.footer-product p { font-size: 11px; color: oklch(70% 0.03 308); line-height: 1.65; }
.footer-meta { margin-top: 14px; font-size: 11px; color: oklch(64% 0.03 308); font-family: var(--font-mono); }

/* RESPONSIVE */
@media (max-width: 900px) {
  .calc-grid { grid-template-columns: 1fr; }
  .result-panel { position: static; }
}
@media (max-width: 700px) {
  .nav-links { display: none; }
  .nav-right .btn-product { display: none; }
  .nav-hamburger { display: block; }
  .f-row { grid-template-columns: 1fr; }
  .timing-range { grid-template-columns: 1fr; }
  /* gate: card on top, illustration below (column-reverse: img is first in DOM) */
  .gate-overlay { flex-direction: column-reverse; justify-content: center; gap: clamp(16px,4vw,32px); padding: 32px 20px; }
  .gate-illust { height: auto; width: min(82vw,320px); max-width: none; }
  /* hero: illustration on top, text below (column-reverse: text is first in DOM) */
  .home-hero { flex-direction: column-reverse; text-align: center; gap: clamp(12px,3vw,24px); }
  .hero-illust { width: min(64vw,280px); }
  .hero-text { max-width: 560px; }
  .hero-eyebrow { margin-left: auto; margin-right: auto; }
}
@media (max-width: 480px) {
  .calc-page { padding: 16px 16px 24px; }
  .input-panel, .result-panel { padding: 16px; }
  .gate-card { padding: 28px 20px; }
  .fn-section, .ref-section { padding-left: 16px; padding-right: 16px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
  .calc-card:hover { transform: none; }
  .calc-card:hover .card-cta::after { transform: none; }
}