/* ==========================================================================
   Calcy — Design tokens
   Palette: paper + ink, graph-paper grid motif, indigo/mint/amber accents.
   Display: Space Grotesk · Body: Inter · Numerals: IBM Plex Mono (tabular)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Inter:wght@400;500;600;700&family=IBM+Plex+Mono:wght@500;600&display=swap');

:root{
  --bg: #F6F6F0;
  --bg-raised: #FFFFFE;
  --ink: #14161C;
  --ink-soft: #52565F;
  --ink-faint: #8B8F98;
  --line: #E3E3D8;
  --line-strong: #CFCFC2;
  --accent: #3B4CF0;
  --accent-ink: #FFFFFF;
  --accent-soft: #E9EAFD;
  --mint: #0EA894;
  --mint-soft: #DFF6F2;
  --amber: #E08E1D;
  --amber-soft: #FCEBCF;
  --danger: #D74B3C;
  --danger-soft: #FBE4E0;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 1px 2px rgba(20,22,28,.06), 0 1px 1px rgba(20,22,28,.04);
  --shadow-md: 0 8px 24px rgba(20,22,28,.08), 0 2px 6px rgba(20,22,28,.05);
  --shadow-lg: 0 20px 60px rgba(20,22,28,.14), 0 6px 16px rgba(20,22,28,.08);
  --grid-line: rgba(20,22,28,.05);
  --font-display: 'Space Grotesk', ui-sans-serif, system-ui, sans-serif;
  --font-body: 'Inter', ui-sans-serif, system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;
  --header-h: 68px;
  color-scheme: light;
}

[data-theme="dark"]{
  --bg: #101216;
  --bg-raised: #171A20;
  --ink: #EEEFEA;
  --ink-soft: #ABAFB8;
  --ink-faint: #676B75;
  --line: #262A32;
  --line-strong: #33373F;
  --accent: #6C7CFF;
  --accent-ink: #0B0C10;
  --accent-soft: #1C2040;
  --mint: #2BD9C0;
  --mint-soft: #0E2B27;
  --amber: #F0AB49;
  --amber-soft: #33280F;
  --danger: #F17767;
  --danger-soft: #351B18;
  --grid-line: rgba(238,239,234,.05);
  --shadow-sm: 0 1px 2px rgba(0,0,0,.3);
  --shadow-md: 0 8px 24px rgba(0,0,0,.35);
  --shadow-lg: 0 24px 64px rgba(0,0,0,.5);
  color-scheme: dark;
}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{ animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  transition: background .25s ease, color .25s ease;
}
h1,h2,h3,h4{
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0 0 .5em;
}
p{ margin: 0 0 1em; color: var(--ink-soft); }
a{ color: inherit; text-decoration: none; }
img{ max-width: 100%; display: block; }
button{ font-family: inherit; }
.mono{ font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.container{ width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 24px; }
.visually-hidden{ position:absolute; width:1px; height:1px; overflow:hidden; clip:rect(0 0 0 0); white-space:nowrap; }

::selection{ background: var(--accent); color: var(--accent-ink); }

:focus-visible{
  outline: 2.5px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* Skip link */
.skip-link{
  position: absolute; left: 12px; top: -60px;
  background: var(--accent); color: var(--accent-ink);
  padding: 10px 16px; border-radius: var(--radius-sm);
  z-index: 999; transition: top .2s ease;
  font-weight: 600; font-size: 14px;
}
.skip-link:focus{ top: 12px; }

/* Graph-paper texture, used sparingly on hero + catalog surfaces */
.grid-surface{
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 28px 28px;
}

/* ==========================================================================
   Header / Nav
   ========================================================================== */
.site-header{
  position: sticky; top: 0; z-index: 100;
  height: var(--header-h);
  display: flex; align-items: center;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(14px) saturate(1.4);
  -webkit-backdrop-filter: blur(14px) saturate(1.4);
  border-bottom: 1px solid var(--line);
}
.site-header .container{ display: flex; align-items: center; gap: 24px; }
.brand{ display:flex; align-items:center; gap:9px; font-family: var(--font-display); font-weight: 700; font-size: 20px; letter-spacing: -0.01em; flex-shrink:0; }
.brand-mark{ width: 30px; height: 30px; border-radius: 9px; background: var(--accent); color: var(--accent-ink); display:flex; align-items:center; justify-content:center; font-family: var(--font-mono); font-weight:600; font-size: 15px; }
.brand small{ font-family: var(--font-mono); color: var(--ink-faint); font-weight: 500; font-size: 11px; letter-spacing: .04em; }

.main-nav{ display:flex; align-items:center; gap: 4px; margin-left: 8px; }
.main-nav a{
  padding: 9px 12px; border-radius: var(--radius-sm); font-size: 14.5px; font-weight: 500; color: var(--ink-soft);
  transition: background .15s ease, color .15s ease;
}
.main-nav a:hover{ background: var(--bg-raised); color: var(--ink); box-shadow: var(--shadow-sm); }

.header-actions{ margin-left: auto; display:flex; align-items:center; gap: 8px; }

.search-trigger{
  display:flex; align-items:center; gap:8px;
  background: var(--bg-raised); border: 1px solid var(--line);
  padding: 8px 12px; border-radius: var(--radius-md);
  color: var(--ink-faint); font-size: 13.5px; cursor: pointer;
  min-width: 220px; box-shadow: var(--shadow-sm);
  transition: border-color .15s ease, box-shadow .15s ease;
}
.search-trigger:hover{ border-color: var(--line-strong); }
.search-trigger kbd{ margin-left:auto; font-family: var(--font-mono); font-size: 11px; background: var(--bg); border: 1px solid var(--line); border-radius: 5px; padding: 1px 6px; }

.icon-btn{
  width: 38px; height: 38px; display:flex; align-items:center; justify-content:center;
  border-radius: var(--radius-md); border: 1px solid var(--line); background: var(--bg-raised);
  cursor: pointer; color: var(--ink-soft); box-shadow: var(--shadow-sm);
  transition: transform .15s ease, border-color .15s ease, color .15s ease;
}
.icon-btn:hover{ color: var(--ink); border-color: var(--line-strong); transform: translateY(-1px); }
.icon-btn:active{ transform: translateY(0) scale(.95); }
.icon-btn svg{ width: 18px; height: 18px; }

.menu-toggle{ display:none; }

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap: 8px;
  font-weight: 600; font-size: 14.5px; padding: 11px 20px; border-radius: var(--radius-md);
  border: 1px solid transparent; cursor: pointer; transition: transform .15s ease, box-shadow .15s ease, background .15s ease, border-color .15s ease;
  position: relative; overflow: hidden;
}
.btn:active{ transform: scale(.97); }
.btn-primary{ background: var(--accent); color: var(--accent-ink); box-shadow: var(--shadow-md); }
.btn-primary:hover{ box-shadow: var(--shadow-lg); transform: translateY(-1px); }
.btn-ghost{ background: transparent; border-color: var(--line); color: var(--ink); }
.btn-ghost:hover{ border-color: var(--line-strong); background: var(--bg-raised); }
.btn-sm{ padding: 7px 13px; font-size: 13px; }

/* Ripple */
.ripple{ position:absolute; border-radius:50%; background: rgba(255,255,255,.5); transform: scale(0); animation: ripple .55s ease-out; pointer-events:none; }
[data-theme="dark"] .ripple{ background: rgba(255,255,255,.25); }
@keyframes ripple{ to{ transform: scale(3); opacity: 0; } }

/* ==========================================================================
   Hero
   ========================================================================== */
.hero{
  position: relative; overflow: hidden;
  padding: 72px 0 88px;
  border-bottom: 1px solid var(--line);
}
.hero-grid{
  display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center;
}
.eyebrow{
  display:inline-flex; align-items:center; gap:8px; font-family: var(--font-mono); font-size: 12px; font-weight: 600;
  letter-spacing: .06em; text-transform: uppercase; color: var(--accent); background: var(--accent-soft);
  padding: 6px 12px; border-radius: 100px; margin-bottom: 20px;
}
.hero h1{ font-size: clamp(34px, 4.6vw, 56px); max-width: 620px; }
.hero h1 .accent-underline{ position: relative; display:inline-block; }
.hero h1 .accent-underline::after{ content:''; position:absolute; left:0; right:0; bottom: 4px; height: 10px; background: var(--mint-soft); z-index:-1; border-radius: 3px; }
.hero-sub{ font-size: 17.5px; max-width: 480px; color: var(--ink-soft); }
.hero-cta-row{ display:flex; gap: 12px; margin-top: 28px; flex-wrap: wrap; }
.hero-stats{ display:flex; gap: 28px; margin-top: 40px; flex-wrap: wrap; }
.hero-stat b{ display:block; font-family: var(--font-mono); font-size: 24px; font-weight: 600; }
.hero-stat span{ font-size: 12.5px; color: var(--ink-faint); }

/* Signature: live working calculator embedded in the hero */
.hero-calc-wrap{ position: relative; }
.hero-calc{
  position: relative; z-index: 2;
  background: var(--bg-raised); border: 1px solid var(--line); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg); overflow: hidden; max-width: 360px; margin-left: auto;
}
.hero-calc-head{ display:flex; align-items:center; justify-content:space-between; padding: 14px 18px; border-bottom: 1px solid var(--line); }
.hero-calc-head span{ font-family: var(--font-mono); font-size: 11px; color: var(--ink-faint); letter-spacing: .04em; }
.hero-calc-dots{ display:flex; gap:6px; }
.hero-calc-dots i{ width:8px; height:8px; border-radius:50%; background: var(--line-strong); display:block; }
.hero-calc-display{
  padding: 26px 20px 14px; text-align: right; background:
    repeating-linear-gradient(var(--grid-line) 0 1px, transparent 1px 27px);
}
.hero-calc-expr{ font-family: var(--font-mono); color: var(--ink-faint); font-size: 13px; min-height: 16px; }
.hero-calc-result{ font-family: var(--font-mono); font-weight: 600; font-size: 40px; letter-spacing: -0.02em; }
.hero-calc-pad{ display:grid; grid-template-columns: repeat(4,1fr); gap: 1px; background: var(--line); }
.hero-calc-pad button{
  border: none; background: var(--bg-raised); padding: 16px 0; font-family: var(--font-mono); font-size: 16px;
  cursor: pointer; color: var(--ink); transition: background .1s ease;
}
.hero-calc-pad button:hover{ background: var(--bg); }
.hero-calc-pad button.op{ color: var(--accent); font-weight: 600; }
.hero-calc-pad button.eq{ background: var(--accent); color: var(--accent-ink); font-weight: 700; }
.hero-calc-pad button.eq:hover{ filter: brightness(1.05); }
.hero-float-badge{
  position: absolute; z-index: 1; font-family: var(--font-mono); font-size: 12px; font-weight: 600;
  background: var(--mint-soft); color: var(--mint); padding: 8px 12px; border-radius: 100px; box-shadow: var(--shadow-md);
}
.hero-float-badge.b1{ top: -14px; left: -18px; transform: rotate(-4deg); }
.hero-float-badge.b2{ bottom: 10px; left: -30px; transform: rotate(3deg); background: var(--amber-soft); color: var(--amber); }

/* ==========================================================================
   Search overlay
   ========================================================================== */
.search-overlay{
  position: fixed; inset: 0; background: rgba(10,11,14,.5); backdrop-filter: blur(3px);
  display:flex; align-items:flex-start; justify-content:center; padding: 10vh 20px 0;
  z-index: 1000; opacity: 0; pointer-events: none; transition: opacity .18s ease;
}
.search-overlay.open{ opacity: 1; pointer-events: auto; }
.search-panel{
  width: 100%; max-width: 620px; background: var(--bg-raised); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg); border: 1px solid var(--line); overflow: hidden;
  transform: translateY(-14px); transition: transform .2s ease;
}
.search-overlay.open .search-panel{ transform: translateY(0); }
.search-input-row{ display:flex; align-items:center; gap: 12px; padding: 16px 20px; border-bottom: 1px solid var(--line); }
.search-input-row svg{ width:18px; height:18px; color: var(--ink-faint); flex-shrink:0; }
.search-input-row input{
  flex:1; border:none; outline:none; background:transparent; font-size: 16px; color: var(--ink); font-family: var(--font-body);
}
.search-input-row kbd{ font-family: var(--font-mono); font-size: 11px; color: var(--ink-faint); border: 1px solid var(--line); border-radius: 5px; padding: 2px 6px; }
.search-results{ max-height: 55vh; overflow-y: auto; padding: 8px; }
.search-result{
  display:flex; align-items:center; gap: 12px; padding: 11px 12px; border-radius: var(--radius-sm); cursor: pointer;
}
.search-result:hover, .search-result.active{ background: var(--accent-soft); }
.search-result-icon{ width:34px; height:34px; border-radius:9px; background: var(--bg); display:flex; align-items:center; justify-content:center; font-size:16px; flex-shrink:0; }
.search-result-title{ font-weight: 600; font-size: 14.5px; }
.search-result-cat{ font-size: 12px; color: var(--ink-faint); font-family: var(--font-mono); }
.search-empty{ padding: 32px 20px; text-align:center; color: var(--ink-faint); font-size: 14px; }

/* ==========================================================================
   Sections / catalog
   ========================================================================== */
.section{ padding: 72px 0; }
.section-head{ display:flex; align-items:flex-end; justify-content:space-between; margin-bottom: 32px; gap: 20px; flex-wrap: wrap; }
.section-head h2{ font-size: clamp(24px, 2.6vw, 32px); }
.section-kicker{ font-family: var(--font-mono); font-size: 12px; color: var(--accent); text-transform: uppercase; letter-spacing: .08em; font-weight: 600; margin-bottom: 8px; display:block; }
.section-desc{ color: var(--ink-soft); max-width: 520px; }
.view-all{ font-size: 14px; font-weight: 600; color: var(--accent); display:flex; align-items:center; gap:6px; white-space:nowrap; }

.card-grid{ display:grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 16px; }

.calc-card{
  background: var(--bg-raised); border: 1px solid var(--line); border-radius: var(--radius-md);
  padding: 18px; display:flex; flex-direction:column; gap: 10px; transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
  position: relative;
}
.calc-card:hover{ transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--line-strong); }
.calc-card-top{ display:flex; align-items:flex-start; justify-content:space-between; }
.calc-card-icon{ width:38px; height:38px; border-radius:10px; display:flex; align-items:center; justify-content:center; font-size:18px; background: var(--accent-soft); }
.calc-card-code{ font-family: var(--font-mono); font-size: 10.5px; color: var(--ink-faint); letter-spacing: .04em; padding-top: 4px; }
.calc-card h3{ font-family: var(--font-body); font-weight: 600; font-size: 15px; margin: 0; }
.calc-card p{ font-size: 13px; margin: 0; color: var(--ink-faint); }
.fav-btn{
  position:absolute; top: 14px; right: 14px; background:none; border:none; cursor:pointer; color: var(--line-strong);
  width: 24px; height: 24px; display:flex; align-items:center; justify-content:center;
}
.fav-btn.active{ color: var(--amber); }
.fav-btn svg{ width: 17px; height: 17px; }

/* Category strip */
.cat-strip{ display:flex; gap: 10px; overflow-x: auto; padding-bottom: 6px; margin-bottom: 28px; scrollbar-width: thin; }
.cat-pill{
  flex-shrink: 0; font-size: 13.5px; font-weight: 600; padding: 9px 16px; border-radius: 100px; border: 1px solid var(--line);
  background: var(--bg-raised); cursor: pointer; color: var(--ink-soft); white-space: nowrap; transition: all .15s ease;
}
.cat-pill:hover{ border-color: var(--line-strong); }
.cat-pill.active{ background: var(--ink); color: var(--bg); border-color: var(--ink); }
[data-theme="dark"] .cat-pill.active{ background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }

/* Category tiles on homepage */
.category-tile{
  background: var(--bg-raised); border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 24px; transition: transform .18s ease, box-shadow .18s ease;
}
.category-tile:hover{ transform: translateY(-3px); box-shadow: var(--shadow-md); }
.category-tile .calc-card-icon{ width:44px; height:44px; font-size:20px; margin-bottom: 14px; }
.category-tile h3{ font-size: 17px; margin-bottom: 4px; }
.category-tile .count{ font-family: var(--font-mono); font-size: 12px; color: var(--ink-faint); }

/* FAQ */
.faq-item{ border-bottom: 1px solid var(--line); }
.faq-q{
  width: 100%; text-align:left; background:none; border:none; padding: 20px 4px; cursor:pointer;
  display:flex; align-items:center; justify-content:space-between; font-weight: 600; font-size: 15.5px; color: var(--ink);
}
.faq-q svg{ width:18px; height:18px; flex-shrink:0; transition: transform .2s ease; color: var(--ink-faint); }
.faq-item.open .faq-q svg{ transform: rotate(45deg); }
.faq-a{ max-height: 0; overflow: hidden; transition: max-height .25s ease; }
.faq-item.open .faq-a{ max-height: 300px; }
.faq-a p{ padding: 0 4px 20px; }

/* Stats band */
.stats-band{ background: var(--ink); color: var(--bg); border-radius: var(--radius-lg); padding: 44px 40px; display:grid; grid-template-columns: repeat(4,1fr); gap: 24px; }
[data-theme="dark"] .stats-band{ background: var(--bg-raised); border: 1px solid var(--line); }
.stats-band b{ display:block; font-family: var(--font-mono); font-size: 30px; }
.stats-band span{ font-size: 12.5px; opacity: .7; }

/* Testimonials */
.testimonial-card{ background: var(--bg-raised); border: 1px solid var(--line); border-radius: var(--radius-md); padding: 22px; }
.testimonial-card p{ font-size: 14.5px; color: var(--ink); }
.testimonial-who{ display:flex; align-items:center; gap:10px; margin-top: 14px; }
.testimonial-avatar{ width: 32px; height:32px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); display:flex; align-items:center; justify-content:center; font-weight:700; font-size: 13px; font-family: var(--font-display); }
.testimonial-name{ font-weight: 600; font-size: 13.5px; }
.testimonial-role{ font-size: 12px; color: var(--ink-faint); }
.stars{ color: var(--amber); font-size: 13px; letter-spacing: 1px; }

/* Newsletter */
.newsletter{ background: var(--accent-soft); border-radius: var(--radius-lg); padding: 44px; text-align:center; }
[data-theme="dark"] .newsletter{ background: var(--bg-raised); border:1px solid var(--line); }
.newsletter h2{ font-size: 24px; }
.newsletter-form{ display:flex; gap: 10px; max-width: 420px; margin: 20px auto 0; }
.newsletter-form input{ flex:1; padding: 12px 16px; border-radius: var(--radius-md); border: 1px solid var(--line); font-size: 14.5px; background: var(--bg-raised); color: var(--ink); }

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer{ border-top: 1px solid var(--line); padding: 56px 0 28px; margin-top: 40px; }
.footer-grid{ display:grid; grid-template-columns: 1.4fr 1fr 1fr 1fr 1fr; gap: 32px; }
.footer-col h4{ font-size: 12.5px; text-transform: uppercase; letter-spacing: .06em; color: var(--ink-faint); font-family: var(--font-mono); margin-bottom: 14px; }
.footer-col a{ display:block; font-size: 14px; color: var(--ink-soft); padding: 5px 0; }
.footer-col a:hover{ color: var(--accent); }
.footer-bottom{ display:flex; justify-content:space-between; align-items:center; margin-top: 44px; padding-top: 24px; border-top: 1px solid var(--line); flex-wrap: wrap; gap: 12px; }
.footer-bottom p{ margin:0; font-size: 13px; color: var(--ink-faint); }
.social-row{ display:flex; gap: 10px; }

/* ==========================================================================
   Breadcrumbs
   ========================================================================== */
.breadcrumbs{ display:flex; align-items:center; gap: 8px; font-size: 13px; color: var(--ink-faint); padding: 20px 0; flex-wrap:wrap; }
.breadcrumbs a{ color: var(--ink-faint); }
.breadcrumbs a:hover{ color: var(--accent); }
.breadcrumbs .sep{ opacity: .5; }
.breadcrumbs .current{ color: var(--ink); font-weight: 500; }

/* ==========================================================================
   Calculator page layout
   ========================================================================== */
.calc-page-grid{ display:grid; grid-template-columns: 1fr 320px; gap: 40px; align-items:flex-start; }
.calc-title-row{ display:flex; align-items:center; gap: 14px; margin-bottom: 6px; }
.calc-title-row .calc-card-icon{ width: 46px; height: 46px; font-size: 22px; }
.calc-page-head h1{ font-size: clamp(26px, 3vw, 34px); margin-bottom: 6px; }
.calc-page-lede{ font-size: 15.5px; max-width: 620px; margin-bottom: 28px; }

.tool-panel{
  background: var(--bg-raised); border: 1px solid var(--line); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm); overflow: hidden;
}
.tool-panel-body{ padding: 28px; }
.field-grid{ display:grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field{ display:flex; flex-direction:column; gap: 7px; }
.field.full{ grid-column: 1 / -1; }
.field label{ font-size: 13px; font-weight: 600; color: var(--ink-soft); display:flex; justify-content:space-between; }
.field label .hint{ font-weight: 400; color: var(--ink-faint); font-family: var(--font-mono); font-size: 11.5px; }
.field input[type="number"], .field input[type="text"], .field input[type="date"], .field select{
  padding: 11px 14px; border: 1.5px solid var(--line); border-radius: var(--radius-sm); font-size: 15px;
  background: var(--bg); color: var(--ink); font-family: var(--font-mono); transition: border-color .15s ease, box-shadow .15s ease;
  width: 100%;
}
.field input:focus, .field select:focus{ border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); outline: none; }
.field-radio-row{ display:flex; gap: 8px; flex-wrap: wrap; }
.field-radio-row label{
  display:flex; align-items:center; gap:6px; font-size: 13.5px; font-weight: 500; color: var(--ink);
  border: 1.5px solid var(--line); padding: 8px 13px; border-radius: 100px; cursor:pointer; transition: all .15s ease;
}
.field-radio-row input{ accent-color: var(--accent); }
.field-radio-row label:has(input:checked){ border-color: var(--accent); background: var(--accent-soft); }

.tool-actions{ display:flex; gap: 10px; margin-top: 24px; flex-wrap: wrap; }

.result-panel{
  margin-top: 24px; border-top: 1px dashed var(--line); padding-top: 24px; display:none;
}
.result-panel.show{ display:block; animation: fadein .25s ease; }
@keyframes fadein{ from{ opacity:0; transform: translateY(4px);} to{opacity:1; transform:none;} }
.result-hero{ display:flex; align-items:baseline; gap: 12px; flex-wrap:wrap; margin-bottom: 18px; }
.result-hero .value{ font-family: var(--font-mono); font-weight: 600; font-size: 40px; color: var(--accent); letter-spacing: -0.02em; }
.result-hero .label{ font-size: 13.5px; color: var(--ink-faint); }
.result-breakdown{ display:grid; grid-template-columns: repeat(auto-fit,minmax(150px,1fr)); gap: 12px; }
.result-stat{ background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 12px 14px; }
.result-stat b{ display:block; font-family: var(--font-mono); font-size: 18px; }
.result-stat span{ font-size: 12px; color: var(--ink-faint); }
.result-actions{ display:flex; gap: 8px; margin-top: 20px; flex-wrap: wrap; }

.side-panel{ display:flex; flex-direction:column; gap: 20px; position: sticky; top: calc(var(--header-h) + 20px); }
.info-card{ background: var(--bg-raised); border: 1px solid var(--line); border-radius: var(--radius-md); padding: 20px; }
.info-card h4{ font-size: 13px; margin-bottom: 10px; text-transform:uppercase; letter-spacing:.05em; color: var(--ink-faint); font-family: var(--font-mono); }
.info-card ul{ margin:0; padding-left: 18px; font-size: 13.5px; color: var(--ink-soft); }
.info-card li{ margin-bottom: 6px; }

.related-list a{
  display:flex; align-items:center; gap: 10px; padding: 9px 4px; font-size: 13.5px; font-weight: 500; border-bottom: 1px solid var(--line);
}
.related-list a:last-child{ border-bottom:none; }
.related-list a:hover{ color: var(--accent); }

.explainer{ margin-top: 56px; max-width: 760px; }
.explainer h2{ font-size: 22px; margin-top: 32px; }
.explainer p, .explainer li{ font-size: 15px; }

/* Toast */
.toast-stack{ position: fixed; bottom: 22px; right: 22px; display:flex; flex-direction:column; gap: 10px; z-index: 1200; }
.toast{
  background: var(--ink); color: var(--bg); padding: 12px 18px; border-radius: var(--radius-sm); font-size: 13.5px;
  box-shadow: var(--shadow-lg); display:flex; align-items:center; gap: 10px; animation: toast-in .2s ease;
}
[data-theme="dark"] .toast{ background: var(--bg-raised); border: 1px solid var(--line); }
@keyframes toast-in{ from{ opacity:0; transform: translateY(8px);} to{opacity:1; transform:none;} }

/* Skeleton */
.skeleton{ background: linear-gradient(90deg, var(--line) 25%, var(--bg) 50%, var(--line) 75%); background-size: 200% 100%; animation: shimmer 1.3s infinite; border-radius: var(--radius-sm); }
@keyframes shimmer{ from{ background-position: 200% 0;} to{ background-position: -200% 0;} }

/* 404 */
.error-page{ text-align:center; padding: 100px 20px; }
.error-page .code{ font-family: var(--font-mono); font-size: 96px; font-weight: 600; color: var(--accent); }

/* Responsive */
@media (max-width: 980px){
  .hero-grid{ grid-template-columns: 1fr; }
  .hero-calc{ margin: 0 auto; }
  .calc-page-grid{ grid-template-columns: 1fr; }
  .side-panel{ position: static; }
  .footer-grid{ grid-template-columns: 1fr 1fr; }
  .stats-band{ grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px){
  .main-nav{
    display:none; position: fixed; top: var(--header-h); left:0; right:0; bottom:0;
    background: var(--bg); flex-direction:column; padding: 18px; gap: 4px; overflow-y:auto; z-index: 90;
  }
  .main-nav.open{ display:flex; }
  .main-nav a{ padding: 14px 12px; font-size: 16px; border-bottom: 1px solid var(--line); border-radius:0; }
  .search-trigger{ min-width: 0; width: 38px; padding: 8px; justify-content:center; }
  .search-trigger span, .search-trigger kbd{ display:none; }
  .menu-toggle{ display:flex; }
  .field-grid{ grid-template-columns: 1fr; }
  .footer-grid{ grid-template-columns: 1fr 1fr; }
}