/* ==========================================================================
   CalculatorWorld.in — Design System
   Pure CSS3. Indigo art direction · Sora + Plus Jakarta Sans · light editorial
   ========================================================================== */

/* ---- Fonts ---- */
@import url('https://fonts.googleapis.com/css2?family=Sora:wght@400;500;600;700;800&family=Plus+Jakarta+Sans:wght@400;500;600;700&display=swap');

/* ---- Tokens ---- */
:root {
  --ink: #0b1020;
  --ink-2: #2a3050;
  --muted: #6a7192;
  --line: #e7e8f2;
  --line-2: #eef0f8;
  --bg: #fbfbfe;
  --bg-soft: #f4f5fc;
  --card: #ffffff;

  --brand: #4f46e5;
  --brand-2: #6366f1;
  --brand-ink: #3730a3;
  --brand-wash: #eef0ff;
  --brand-wash-2: #e6e9ff;

  --ok: #0f9d58;
  --warn: #d97706;
  --bad: #dc2626;

  --radius: 20px;
  --radius-sm: 14px;
  --radius-lg: 28px;

  --shadow-sm: 0 1px 2px rgba(11,16,32,.05), 0 2px 8px rgba(11,16,32,.04);
  --shadow: 0 6px 24px rgba(11,16,32,.07), 0 2px 8px rgba(11,16,32,.05);
  --shadow-lg: 0 24px 60px -20px rgba(38,42,120,.25);
  --shadow-brand: 0 18px 40px -14px rgba(79,70,229,.45);

  --maxw: 1200px;
  --nav-h: 72px;
  --ease: cubic-bezier(.22,.61,.36,1);
}

/* ---- Reset ---- */
*,*::before,*::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img,svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }
input,select,textarea { font: inherit; color: inherit; }
::selection { background: var(--brand); color: #fff; }
h1,h2,h3,h4 { font-family: 'Sora', sans-serif; line-height: 1.08; letter-spacing: -.02em; font-weight: 700; }

/* ---- Layout ---- */
.wrap { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: 22px; }
.section { padding: clamp(56px, 8vw, 120px) 0; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: 'Sora', sans-serif; font-weight: 600; font-size: .74rem;
  letter-spacing: .18em; text-transform: uppercase; color: var(--brand-ink);
  padding: 7px 13px; border-radius: 100px; background: var(--brand-wash);
  border: 1px solid var(--brand-wash-2);
}
.eyebrow .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--brand); }

/* ==========================================================================
   HEADER
   ========================================================================== */
.site-header {
  position: sticky; top: 0; z-index: 60;
  height: var(--nav-h);
  background: rgba(251,251,254,.72);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease), box-shadow .3s var(--ease), background .3s var(--ease);
}
.site-header.scrolled { border-bottom-color: var(--line); box-shadow: var(--shadow-sm); }
.nav { display: flex; align-items: center; justify-content: space-between; height: var(--nav-h); }
.brand { display: inline-flex; align-items: center; gap: 11px; font-family: 'Sora', sans-serif; font-weight: 800; font-size: 1.16rem; letter-spacing: -.03em; }
.brand .mark {
  width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--brand-2), var(--brand));
  color: #fff; box-shadow: var(--shadow-brand); flex: none;
}
.brand .mark svg { width: 18px; height: 18px; }
.brand .bn { letter-spacing: -.02em; }
.brand b { color: var(--brand); margin-left: -3px; }

/* Header search box (single, universal) */
.header-search {
  position: relative; flex: 1; max-width: 460px; margin-left: 28px;
  display: flex; align-items: center; gap: 10px;
  background: var(--bg-soft); border: 1.5px solid var(--line);
  border-radius: 100px; padding: 10px 18px;
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease);
}
.header-search:focus-within { border-color: var(--brand-2); box-shadow: 0 0 0 4px var(--brand-wash); background: #fff; }
.header-search .ico { width: 18px; height: 18px; color: var(--muted); flex: none; }
.header-search input { flex: 1; border: none; outline: none; background: none; font-size: .92rem; padding: 0; }
.header-search .search-results { top: calc(100% + 12px); }

/* Menu (overlay) search — always visible inside the mobile menu */
.mm-search {
  position: relative; display: flex; align-items: center; gap: 10px;
  background: var(--bg-soft); border: 1.5px solid var(--line); border-radius: 14px;
  padding: 13px 16px; margin-bottom: 22px;
}
.mm-search:focus-within { border-color: var(--brand-2); box-shadow: 0 0 0 4px var(--brand-wash); background: #fff; }
.mm-search .ico { width: 18px; height: 18px; color: var(--muted); flex: none; }
.mm-search input { flex: 1; border: none; outline: none; background: none; font-size: 1rem; padding: 0; }
.mm-search .search-results { top: calc(100% + 10px); }

.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  font-weight: 600; font-size: .9rem; color: var(--ink-2); white-space: nowrap;
  padding: 9px 11px; border-radius: 10px; position: relative;
  transition: color .2s var(--ease), background .2s var(--ease);
}
.nav-links a:hover { color: var(--brand-ink); background: var(--brand-wash); }
.nav-links a.active { color: var(--brand); }

.nav-cta {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--ink); color: #fff; padding: 10px 16px; border-radius: 100px;
  font-weight: 600; font-size: .9rem; transition: transform .25s var(--ease), box-shadow .25s var(--ease);
}
.nav-cta:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); background: var(--ink); color:#fff; }

.burger { display: grid; width: 46px; height: 46px; border-radius: 12px; place-items: center; background: var(--bg-soft); border: 1px solid var(--line); flex: none; margin-left: 16px; transition: background .2s, border-color .2s; }
.burger:hover { background: var(--brand-wash); border-color: var(--brand-wash-2); }
.burger span { display: block; width: 20px; height: 2px; background: var(--ink); border-radius: 2px; position: relative; transition: transform .3s var(--ease), opacity .2s; }
.burger span::before, .burger span::after { content:''; position: absolute; left: 0; width: 20px; height: 2px; background: var(--ink); border-radius: 2px; transition: transform .3s var(--ease); }
.burger span::before { top: -6px; } .burger span::after { top: 6px; }
body.menu-open .burger span { background: transparent; }
body.menu-open .burger span::before { transform: translateY(6px) rotate(45deg); }
body.menu-open .burger span::after { transform: translateY(-6px) rotate(-45deg); }

.mobile-menu {
  position: fixed; inset: var(--nav-h) 0 0; z-index: 55;
  background: var(--bg); padding: 26px 22px 40px;
  transform: translateY(-8px); opacity: 0; pointer-events: none;
  transition: opacity .3s var(--ease), transform .3s var(--ease);
  overflow-y: auto;
}
body.menu-open .mobile-menu { opacity: 1; transform: none; pointer-events: auto; }
.mobile-menu a { display: block; font-family:'Sora',sans-serif; font-weight: 600; font-size: 1.35rem; padding: 14px 4px; border-bottom: 1px solid var(--line-2); color: var(--ink); }
.mobile-menu a:hover { color: var(--brand); padding-left: 12px; transition: padding .2s var(--ease); }

/* ==========================================================================
   HERO
   ========================================================================== */
.hero { position: relative; padding: clamp(48px,7vw,92px) 0 clamp(40px,5vw,64px); overflow: hidden; }
.hero-bg { position: absolute; inset: 0; z-index: -1; pointer-events: none; }
.hero-bg .blob {
  position: absolute; border-radius: 50%; filter: blur(60px); opacity: .5;
}
.hero-bg .b1 { width: 520px; height: 520px; top: -180px; right: -120px; background: radial-gradient(circle,#c7d2fe,transparent 70%); }
.hero-bg .b2 { width: 420px; height: 420px; bottom: -160px; left: -120px; background: radial-gradient(circle,#e0e7ff,transparent 70%); }
.hero-bg .grid-lines {
  position:absolute; inset:0;
  background-image: linear-gradient(var(--line-2) 1px,transparent 1px), linear-gradient(90deg,var(--line-2) 1px,transparent 1px);
  background-size: 56px 56px; opacity: .5;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, #000 30%, transparent 75%);
}
.hero-inner { text-align: center; max-width: 880px; margin-inline: auto; }
.hero h1 {
  font-size: clamp(2.5rem, 7vw, 5rem); font-weight: 800; letter-spacing: -.035em;
  margin: 22px 0 0;
}
.hero h1 .accent { color: var(--brand); }
.hero-sub { font-size: clamp(1.02rem,2.2vw,1.28rem); color: var(--muted); max-width: 620px; margin: 20px auto 0; }

/* masked line reveal */
.reveal-line { overflow: hidden; }
.reveal-line > span { display: block; transform: translateY(102%); transition: transform .9s var(--ease); }
.hero.loaded .reveal-line > span { transform: translateY(0); }
.hero .rl-1 > span { transition-delay: .05s; }
.hero .rl-2 > span { transition-delay: .13s; }

.fade-up { opacity: 0; transform: translateY(22px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.hero.loaded .fade-up { opacity: 1; transform: none; }
.hero.loaded .fade-up.d1 { transition-delay: .35s; }
.hero.loaded .fade-up.d2 { transition-delay: .45s; }
.hero.loaded .fade-up.d3 { transition-delay: .55s; }

/* Search */
.search-box { position: relative; max-width: 620px; margin: 34px auto 0; }
.search-box .field {
  display: flex; align-items: center; gap: 12px;
  background: var(--card); border: 1px solid var(--line);
  border-radius: 100px; padding: 8px 8px 8px 22px;
  box-shadow: var(--shadow); transition: box-shadow .3s var(--ease), border-color .3s var(--ease);
}
.search-box .field:focus-within { border-color: var(--brand-2); box-shadow: var(--shadow-brand); }
.search-box svg.ico { width: 20px; height: 20px; color: var(--muted); flex: none; }
.search-box input { flex: 1; border: none; outline: none; background: none; font-size: 1.02rem; padding: 12px 0; }
.search-box .go { background: var(--brand); color: #fff; padding: 13px 24px; border-radius: 100px; font-weight: 600; transition: background .2s, transform .2s var(--ease); }
.search-box .go:hover { background: var(--brand-ink); transform: translateX(2px); }
.search-results {
  position: absolute; top: calc(100% + 12px); left: 0; right: 0; z-index: 40;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow-lg); padding: 8px; text-align: left;
  max-height: 380px; overflow-y: auto; display: none;
}
.search-results.show { display: block; }
.search-results a { display: flex; align-items: center; gap: 12px; padding: 11px 14px; border-radius: 12px; transition: background .15s; }
.search-results a:hover, .search-results a.hl { background: var(--brand-wash); }
.search-results .ri { width: 34px; height: 34px; border-radius: 9px; background: var(--brand-wash); display: grid; place-items: center; color: var(--brand); flex: none; }
.search-results .rt { font-weight: 600; font-size: .95rem; }
.search-results .rc { font-size: .78rem; color: var(--muted); }
.search-results .empty { padding: 18px 14px; color: var(--muted); font-size: .9rem; }

.hero-stats { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px 40px; margin-top: 40px; }
.hero-stats .st { text-align: center; }
.hero-stats .st b { font-family:'Sora',sans-serif; font-size: 1.7rem; color: var(--ink); display:block; letter-spacing:-.02em; }
.hero-stats .st span { font-size: .82rem; color: var(--muted); }

/* ==========================================================================
   MARQUEE
   ========================================================================== */
.marquee { border-block: 1px solid var(--line); background: var(--card); padding: 20px 0; overflow: hidden; }
.marquee-track { display: flex; gap: 48px; width: max-content; animation: marquee 38s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-track .mi { display: inline-flex; align-items: center; gap: 12px; font-family:'Sora',sans-serif; font-weight: 600; font-size: 1.15rem; color: var(--ink-2); white-space: nowrap; }
.marquee-track .mi svg { width: 18px; height: 18px; color: var(--brand); }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ==========================================================================
   SECTION HEADS
   ========================================================================== */
.sec-head { max-width: 720px; margin-bottom: 46px; }
.sec-head.center { margin-inline: auto; text-align: center; }
.sec-head h2 { font-size: clamp(1.9rem, 4vw, 3rem); margin-top: 16px; }
.sec-head p { color: var(--muted); font-size: 1.08rem; margin-top: 14px; }

/* ==========================================================================
   CATEGORY BLOCKS
   ========================================================================== */
.cat-block { margin-bottom: 56px; }
.cat-block:last-child { margin-bottom: 0; }
.cat-block-head { display: flex; align-items: center; gap: 16px; margin-bottom: 22px; }
.cat-block-head .ci {
  width: 50px; height: 50px; border-radius: 14px; display: grid; place-items: center; flex: none;
  color: #fff;
}
.cat-block-head h3 { font-size: 1.4rem; }
.cat-block-head p { color: var(--muted); font-size: .9rem; }
.cat-ico-finance { background: linear-gradient(135deg,#4f46e5,#7c3aed); }
.cat-ico-health { background: linear-gradient(135deg,#10b981,#059669); }
.cat-ico-math { background: linear-gradient(135deg,#f59e0b,#ea580c); }
.cat-ico-datetime { background: linear-gradient(135deg,#0ea5e9,#2563eb); }
.cat-ico-education { background: linear-gradient(135deg,#ec4899,#db2777); }
.cat-ico-converters { background: linear-gradient(135deg,#14b8a6,#0891b2); }
.cat-ico-developer { background: linear-gradient(135deg,#64748b,#334155); }
.cat-ico-everyday { background: linear-gradient(135deg,#6366f1,#4f46e5); }

.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; }
.calc-card {
  position: relative; background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 22px; display: flex; align-items: flex-start; gap: 14px;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
  overflow: hidden;
}
.calc-card::after {
  content:''; position: absolute; inset: 0; border-radius: inherit;
  background: radial-gradient(120% 120% at 100% 0%, var(--brand-wash), transparent 55%);
  opacity: 0; transition: opacity .3s var(--ease);
}
.calc-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--brand-wash-2); }
.calc-card:hover::after { opacity: 1; }
.calc-card .cc-ico {
  width: 42px; height: 42px; border-radius: 12px; flex: none; display: grid; place-items: center;
  background: var(--brand-wash); color: var(--brand); position: relative; z-index: 1;
  transition: background .3s var(--ease), color .3s var(--ease), transform .3s var(--ease);
}
.calc-card:hover .cc-ico { background: var(--brand); color: #fff; transform: rotate(-6deg); }
.calc-card .cc-ico svg { width: 20px; height: 20px; }
.calc-card .cc-body { position: relative; z-index: 1; }
.calc-card .cc-title { display: block; font-family:'Sora',sans-serif; font-weight: 600; font-size: 1.02rem; letter-spacing: -.01em; }
.calc-card .cc-desc { display: block; font-size: .84rem; color: var(--muted); margin-top: 5px; }
.calc-card .cc-arrow { position: absolute; top: 18px; right: 18px; color: var(--muted); opacity: 0; transform: translateX(-6px); transition: opacity .25s var(--ease), transform .25s var(--ease); z-index:1; }
.calc-card:hover .cc-arrow { opacity: 1; transform: none; color: var(--brand); }

/* ==========================================================================
   MANIFESTO / CHAPTERS
   ========================================================================== */
.manifesto { background: var(--ink); color: #fff; border-radius: var(--radius-lg); padding: clamp(36px,6vw,72px); position: relative; overflow: hidden; }
.manifesto::before { content:''; position:absolute; inset:0; background: radial-gradient(60% 80% at 90% 10%, rgba(99,102,241,.35), transparent 60%); }
.manifesto .m-head { position: relative; }
.manifesto h2 { color: #fff; font-size: clamp(1.9rem,4vw,3rem); }
.manifesto .m-head p { color: rgba(255,255,255,.62); margin-top: 14px; max-width: 560px; }
.chapters { position: relative; display: grid; grid-template-columns: repeat(auto-fit,minmax(240px,1fr)); gap: 2px; margin-top: 48px; background: rgba(255,255,255,.08); border-radius: var(--radius); overflow: hidden; }
.chapter { background: var(--ink); padding: 30px 26px; transition: background .3s var(--ease); }
.chapter:hover { background: #12172b; }
.chapter .num { font-family:'Sora',sans-serif; font-size: .8rem; color: var(--brand-2); font-weight: 600; letter-spacing: .1em; }
.chapter h3 { color: #fff; font-size: 1.22rem; margin: 14px 0 8px; }
.chapter p { color: rgba(255,255,255,.6); font-size: .92rem; }

/* ==========================================================================
   CTA STRIP
   ========================================================================== */
.cta-strip { text-align: center; }
.cta-card {
  background: linear-gradient(135deg, var(--brand-2), var(--brand));
  border-radius: var(--radius-lg); padding: clamp(40px,6vw,72px); color: #fff; position: relative; overflow: hidden;
  box-shadow: var(--shadow-brand);
}
.cta-card::before { content:''; position:absolute; top:-40%; left:-10%; width: 60%; height: 180%; background: rgba(255,255,255,.08); transform: rotate(20deg); }
.cta-card h2 { color: #fff; font-size: clamp(1.9rem,4vw,3rem); position: relative; }
.cta-card p { color: rgba(255,255,255,.85); margin: 14px auto 26px; max-width: 520px; position: relative; }
.btn-white { display:inline-flex; align-items:center; gap:8px; background: #fff; color: var(--brand-ink); padding: 14px 28px; border-radius: 100px; font-weight: 700; position: relative; transition: transform .25s var(--ease), box-shadow .25s var(--ease); }
.btn-white:hover { transform: translateY(-3px); box-shadow: 0 20px 40px -12px rgba(0,0,0,.35); color: var(--brand-ink); }

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer { background: var(--ink); color: rgba(255,255,255,.66); padding: 64px 0 30px; margin-top: 0; }
.footer-grid { display: grid; grid-template-columns: 1.6fr repeat(3, 1fr); gap: 40px; }
.footer-brand .brand { color: #fff; }
.footer-brand p { margin-top: 16px; font-size: .92rem; max-width: 300px; color: rgba(255,255,255,.55); }
.footer-col h4 { color: #fff; font-family:'Sora',sans-serif; font-size: .82rem; letter-spacing: .12em; text-transform: uppercase; margin-bottom: 16px; }
.footer-col a { display: block; padding: 6px 0; font-size: .92rem; color: rgba(255,255,255,.62); transition: color .2s, padding .2s var(--ease); }
.footer-col a:hover { color: #fff; padding-left: 5px; }
.footer-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; margin-top: 48px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.1); font-size: .85rem; color: rgba(255,255,255,.5); }

/* ==========================================================================
   ADS + ANALYTICS PLACEHOLDERS
   ========================================================================== */
.ad-slot {
  border: 1px dashed var(--line); border-radius: var(--radius-sm); background: var(--bg-soft);
  display: grid; place-items: center; color: var(--muted); text-align: center;
  min-height: 96px; padding: 16px; margin: 26px 0;
  font-size: .78rem; letter-spacing: .06em; text-transform: uppercase;
}
.ad-slot span { opacity: .7; }
.ad-slot.sidebar { min-height: 600px; }

/* ==========================================================================
   REVEAL ON SCROLL
   ========================================================================== */
[data-reveal] { opacity: 0; transform: translateY(28px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
[data-reveal].in { opacity: 1; transform: none; }
[data-reveal-stagger] > * { opacity: 0; transform: translateY(24px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
[data-reveal-stagger].in > * { opacity: 1; transform: none; }

/* ==========================================================================
   BREADCRUMB
   ========================================================================== */
.breadcrumb { padding: 18px 0 0; }
.breadcrumb ol { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; padding: 0; font-size: .84rem; color: var(--muted); }
.breadcrumb li { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb li:not(:last-child)::after { content: '/'; color: var(--line); }
.breadcrumb a:hover { color: var(--brand); }
.breadcrumb li[aria-current] { color: var(--ink); font-weight: 600; }

/* ==========================================================================
   CALCULATOR PAGE LAYOUT
   ========================================================================== */
.calc-hero { padding: 8px 0 12px; }
.calc-hero h1 { font-size: clamp(2rem, 5vw, 3.2rem); margin-top: 14px; }
.calc-hero .lede { color: var(--muted); font-size: 1.12rem; max-width: 620px; margin-top: 16px; }
.calc-hero .tag { display:inline-flex; }

.calc-layout { display: grid; grid-template-columns: minmax(0,1fr) 300px; gap: 40px; align-items: start; }
.calc-main { min-width: 0; }
.calc-side { position: sticky; top: calc(var(--nav-h) + 20px); display: flex; flex-direction: column; gap: 22px; }

/* Calculator tool card */
.tool {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-lg);
  box-shadow: var(--shadow); padding: clamp(22px, 3vw, 34px); position: relative; overflow: hidden;
}
.tool::before { content:''; position:absolute; top:0; left:0; right:0; height: 4px; background: linear-gradient(90deg, var(--brand-2), var(--brand), #a855f7); }
.tabs { display: flex; flex-wrap: wrap; gap: 6px; background: var(--bg-soft); padding: 5px; border-radius: 100px; margin-bottom: 24px; }
.tabs button { flex: 1; min-width: max-content; padding: 10px 16px; border-radius: 100px; font-weight: 600; font-size: .88rem; color: var(--muted); transition: color .2s, background .2s, box-shadow .2s; }
.tabs button.active { background: var(--card); color: var(--brand); box-shadow: var(--shadow-sm); }

.field-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 16px; }
.field-grid.one { grid-template-columns: 1fr; }
.form-row { display: flex; flex-direction: column; gap: 7px; }
.form-row.full { grid-column: 1/-1; }
label { font-weight: 600; font-size: .86rem; color: var(--ink-2); }
label .hint { font-weight: 400; color: var(--muted); font-size: .8rem; }
.control {
  display: flex; align-items: center; background: var(--bg); border: 1.5px solid var(--line);
  border-radius: 12px; padding: 0 14px; transition: border-color .2s, box-shadow .2s, background .2s;
}
.control:focus-within { border-color: var(--brand-2); box-shadow: 0 0 0 4px var(--brand-wash); background: #fff; }
.control input, .control select { flex: 1; border: none; outline: none; background: none; padding: 13px 0; width: 100%; font-weight: 500; }
.control select { cursor: pointer; }
.control .adorn { color: var(--muted); font-weight: 600; font-size: .9rem; white-space: nowrap; }
.control .adorn.left { margin-right: 8px; }
.control .adorn.right { margin-left: 8px; }
textarea.control { display: block; padding: 13px 14px; resize: vertical; min-height: 130px; font-family: 'JetBrains Mono', ui-monospace, monospace; font-size: .88rem; line-height: 1.55; width: 100%; }

.seg { display: inline-flex; background: var(--bg-soft); padding: 4px; border-radius: 100px; gap: 3px; }
.seg button { padding: 8px 16px; border-radius: 100px; font-weight: 600; font-size: .84rem; color: var(--muted); transition: .2s; }
.seg button.active { background: #fff; color: var(--brand); box-shadow: var(--shadow-sm); }

.slider-row { margin-top: 4px; }
.slider-row input[type=range] { -webkit-appearance: none; appearance: none; width: 100%; height: 6px; border-radius: 100px; background: var(--line-2); outline: none; margin-top: 8px; }
.slider-row input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 22px; height: 22px; border-radius: 50%; background: var(--brand); border: 4px solid #fff; box-shadow: var(--shadow-sm); cursor: pointer; }
.slider-row input[type=range]::-moz-range-thumb { width: 22px; height: 22px; border-radius: 50%; background: var(--brand); border: 4px solid #fff; cursor: pointer; }

.btn-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  background: var(--brand); color: #fff; padding: 14px 26px; border-radius: 12px;
  font-weight: 600; font-size: .96rem; transition: transform .2s var(--ease), box-shadow .2s var(--ease), background .2s;
}
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-brand); background: var(--brand-ink); }
.btn.ghost { background: var(--bg-soft); color: var(--ink-2); box-shadow: none; }
.btn.ghost:hover { background: var(--brand-wash); color: var(--brand-ink); box-shadow: none; }
.btn:active { transform: translateY(0); }

.error-msg { display: none; margin-top: 14px; padding: 12px 16px; border-radius: 12px; background: #fef2f2; border: 1px solid #fecaca; color: var(--bad); font-size: .88rem; font-weight: 500; }
.error-msg.show { display: flex; align-items: center; gap: 8px; }

/* Result card */
.result { margin-top: 26px; }
.result-card {
  background: linear-gradient(150deg, #eef0ff, #f6f7ff); border: 1px solid var(--brand-wash-2);
  border-radius: var(--radius); padding: 26px; text-align: center; position: relative; overflow:hidden;
}
.result-card .big { font-family:'Sora',sans-serif; font-size: clamp(2.2rem,6vw,3.4rem); font-weight: 800; color: var(--brand-ink); letter-spacing: -.03em; line-height: 1; }
.result-card .big small { font-size: .4em; font-weight: 600; color: var(--muted); }
.result-card .rlabel { color: var(--muted); font-size: .9rem; margin-top: 10px; font-weight: 500; }
.result-card .badge { display: inline-flex; margin-top: 12px; padding: 6px 14px; border-radius: 100px; font-weight: 700; font-size: .9rem; }
.badge.ok { background: #dcfce7; color: #15803d; } .badge.warn { background: #fef3c7; color: #b45309; } .badge.bad { background: #fee2e2; color: #b91c1c; } .badge.info { background: var(--brand-wash); color: var(--brand-ink); }

.result-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(120px,1fr)); gap: 12px; margin-top: 16px; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 16px; text-align: center; }
.stat b { font-family:'Sora',sans-serif; font-size: 1.5rem; color: var(--ink); display: block; letter-spacing: -.02em; }
.stat span { font-size: .78rem; color: var(--muted); }

.bars { display: flex; height: 16px; border-radius: 100px; overflow: hidden; margin: 18px 0 10px; background: var(--line-2); }
.bars i { height: 100%; display: block; }
.bar-legend { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; font-size: .82rem; color: var(--muted); }
.bar-legend span { display: inline-flex; align-items: center; gap: 6px; }
.bar-legend .sw { width: 11px; height: 11px; border-radius: 3px; }

.donut-wrap { display:flex; align-items:center; justify-content:center; gap: 28px; flex-wrap: wrap; margin-top: 10px; }
.donut { --p:0; width: 150px; height: 150px; border-radius: 50%; flex: none;
  background: conic-gradient(var(--brand) calc(var(--p)*1%), var(--brand-wash-2) 0);
  display: grid; place-items: center; position: relative; }
.donut::before { content:''; position: absolute; inset: 20px; background: var(--card); border-radius: 50%; }
.donut .dc { position: relative; text-align: center; max-width: 96px; }
.donut .dc b { font-family:'Sora',sans-serif; font-size: 1.5rem; color: var(--ink); letter-spacing: -.02em; }
.donut .dc span { font-size: .72rem; color: var(--muted); display:block; line-height: 1.2; }

/* result tables */
.table-scroll { overflow-x: auto; margin-top: 18px; border: 1px solid var(--line); border-radius: 14px; }
table.data { width: 100%; border-collapse: collapse; font-size: .88rem; min-width: 420px; }
table.data th, table.data td { padding: 12px 16px; text-align: right; white-space: nowrap; }
table.data th:first-child, table.data td:first-child { text-align: left; }
table.data thead th { background: var(--bg-soft); font-family:'Sora',sans-serif; font-weight: 600; color: var(--ink-2); font-size: .78rem; text-transform: uppercase; letter-spacing: .05em; position: sticky; top: 0; }
table.data tbody tr { border-top: 1px solid var(--line-2); }
table.data tbody tr:nth-child(even) { background: var(--bg); }

.subject-row { display: grid; grid-template-columns: 1fr 120px 120px 44px; gap: 10px; align-items: center; margin-bottom: 10px; }
.subject-row .icon-btn { width: 44px; height: 44px; border-radius: 12px; background: #fef2f2; color: var(--bad); display: grid; place-items: center; transition: .2s; }
.subject-row .icon-btn:hover { background: #fee2e2; }

.copied-tip { font-size: .82rem; color: var(--ok); font-weight: 600; margin-left: 8px; opacity: 0; transition: opacity .3s; }
.copied-tip.show { opacity: 1; }

/* Prose content */
.prose { margin-top: 8px; }
.prose section { padding: 34px 0; border-top: 1px solid var(--line-2); }
.prose h2 { font-size: 1.6rem; margin-bottom: 16px; }
.prose h3 { font-size: 1.15rem; margin: 22px 0 10px; }
.prose p { color: var(--ink-2); margin-bottom: 14px; }
.prose ul, .prose ol { color: var(--ink-2); margin: 0 0 14px; padding-left: 22px; }
.prose li { margin-bottom: 8px; }
.prose .formula { background: var(--bg-soft); border: 1px solid var(--line); border-left: 4px solid var(--brand); border-radius: 12px; padding: 18px 20px; font-family: ui-monospace, monospace; font-size: .95rem; color: var(--brand-ink); margin: 8px 0 18px; overflow-x: auto; }
.prose .callout { background: var(--brand-wash); border: 1px solid var(--brand-wash-2); border-radius: 14px; padding: 18px 20px; margin: 8px 0 18px; }
.prose .callout strong { color: var(--brand-ink); }
.prose .example-box { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 22px; box-shadow: var(--shadow-sm); }

/* FAQ */
.faq-item { border: 1px solid var(--line); border-radius: 14px; margin-bottom: 12px; overflow: hidden; background: var(--card); transition: box-shadow .2s, border-color .2s; }
.faq-item:hover { border-color: var(--brand-wash-2); }
.faq-q { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 18px 20px; text-align: left; font-family:'Sora',sans-serif; font-weight: 600; font-size: 1rem; }
.faq-q .pm { width: 26px; height: 26px; flex: none; border-radius: 8px; background: var(--brand-wash); color: var(--brand); display: grid; place-items: center; transition: transform .3s var(--ease); }
.faq-item.open .faq-q .pm { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .35s var(--ease); }
.faq-a-inner { padding: 0 20px 20px; color: var(--ink-2); }

/* related */
.related-grid { display: grid; grid-template-columns: repeat(auto-fill,minmax(220px,1fr)); gap: 14px; }

/* category page */
.cat-page-hero { position: relative; overflow: hidden; padding: clamp(40px,6vw,72px) 0; }
.cat-hero-wrap { display: grid; grid-template-columns: 1.1fr .9fr; gap: 44px; align-items: center; }
.cat-hero-text { padding: 0; }
.cat-hero-ico { width: 64px; height: 64px; border-radius: 18px; display: grid; place-items: center; color: #fff; box-shadow: var(--shadow-lg); }
.cat-hero-media { position: relative; }
.cat-hero-media img {
  width: 100%; aspect-ratio: 4/3; object-fit: cover; border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg); border: 1px solid var(--line);
}
.cat-hero-media::after {
  content:''; position: absolute; inset: -1px; border-radius: var(--radius-lg);
  box-shadow: inset 0 0 0 6px rgba(255,255,255,.5); pointer-events: none;
}

/* homepage showcase — real photography, clipped frame + spotlight */
.showcase { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.showcase-media { position: relative; }
.showcase-media img {
  width: 100%; aspect-ratio: 3/2; object-fit: cover;
  border-radius: var(--radius-lg); box-shadow: var(--shadow-lg);
  clip-path: polygon(0 0, 100% 0, 100% 88%, 88% 100%, 0 100%);
}
.showcase-media .sc-spot {
  position: absolute; inset: -30px -30px auto auto; width: 220px; height: 220px; z-index: -1;
  background: radial-gradient(circle, var(--brand-wash-2), transparent 70%); filter: blur(10px);
}
.showcase-media .sc-badge {
  position: absolute; left: -18px; bottom: 24px; background: var(--ink); color: #fff;
  padding: 16px 20px; border-radius: 16px; box-shadow: var(--shadow-lg); display: flex; flex-direction: column;
}
.showcase-media .sc-badge b { font-family:'Sora',sans-serif; font-size: 1.6rem; color: #a5b4fc; letter-spacing: -.02em; }
.showcase-media .sc-badge span { font-size: .78rem; color: rgba(255,255,255,.7); }
.showcase-text h2 { font-size: clamp(1.9rem,4vw,2.8rem); margin: 16px 0 14px; }
.showcase-text p { color: var(--muted); font-size: 1.05rem; }
.showcase-list { list-style: none; padding: 0; margin: 22px 0 0; }
.showcase-list li { display: flex; align-items: center; gap: 12px; padding: 9px 0; font-weight: 600; color: var(--ink-2); }
.showcase-list li svg { color: var(--brand); flex: none; }

/* 404 */
.error-page { min-height: 70vh; display: grid; place-items: center; text-align: center; padding: 60px 0; }
.error-page .code { font-family:'Sora',sans-serif; font-size: clamp(6rem,20vw,12rem); font-weight: 800; line-height: 1; background: linear-gradient(135deg,var(--brand-2),var(--brand)); -webkit-background-clip: text; background-clip: text; color: transparent; letter-spacing: -.05em; }
.pop-links { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-top: 22px; }
.pop-links a { background: var(--card); border: 1px solid var(--line); padding: 10px 18px; border-radius: 100px; font-weight: 600; font-size: .9rem; transition: .2s; }
.pop-links a:hover { border-color: var(--brand); color: var(--brand); transform: translateY(-2px); }

/* legal / content pages */
.doc { max-width: 780px; }
.doc h1 { font-size: clamp(2rem,5vw,3rem); }
.doc .updated { color: var(--muted); font-size: .9rem; margin-top: 10px; }
.doc h2 { font-size: 1.5rem; margin: 34px 0 12px; }
.doc h3 { font-size: 1.15rem; margin: 22px 0 8px; }
.doc p, .doc li { color: var(--ink-2); margin-bottom: 12px; }
.doc ul { padding-left: 22px; }

/* contact form */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.contact-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; display: flex; gap: 14px; margin-bottom: 14px; }
.contact-card .ci { width: 44px; height: 44px; border-radius: 12px; background: var(--brand-wash); color: var(--brand); display: grid; place-items: center; flex: none; }

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width: 1024px) {
  .calc-layout { grid-template-columns: 1fr; }
  .calc-side { position: static; flex-direction: row; flex-wrap: wrap; }
  .calc-side .ad-slot.sidebar { min-height: 120px; flex: 1; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 992px) {
  .header-search { max-width: 320px; }
}
@media (max-width: 640px) {
  .header-search { display: none; }
  .brand { font-size: 1.08rem; }
}
@media (max-width: 760px) {
  .field-grid { grid-template-columns: 1fr; }
  .section { padding: 52px 0; }
  .hero { padding: 28px 0 22px; }
  .prose section { padding: 26px 0; }
  .prose h2 { font-size: 1.4rem; }
  .marquee { padding: 16px 0; }
  .marquee-track { gap: 34px; }
  .marquee-track .mi { font-size: 1rem; }
  .tool::before { height: 3px; }
  .result-card { padding: 22px 16px; }
  .stat b { font-size: 1.3rem; }
  .mobile-menu a { font-size: 1.25rem; padding: 13px 4px; }
  .sec-head { margin-bottom: 32px; }
  .cat-block { margin-bottom: 42px; }
  .subject-row { grid-template-columns: 1fr 80px 80px 40px; gap: 8px; }
  .contact-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero-stats { gap: 12px 26px; }
  .search-box .go span { display: none; }
  .search-box .go { padding: 13px; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
  .card-grid { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
  .marquee-track { animation: none; }
}