/* CalcHandbook — shared site styles */
:root {
  --navy: #0c1c38; --navy-2: #12264d; --navy-3: #1e3a6f;
  --ink: #0c1e3e; --ink-2: #2c4670; --ink-3: #6c7f9c;
  --surface: #ffffff; --surface-alt: #f5f8fc; --surface-sunken: #e8eef6;
  --line: #d6dfeb; --line-2: #9eb3cf;
  --on-dark: #eef3fb; --on-dark-2: #b5c3da; --on-dark-3: #7a8caa;
  --line-on-dark: rgba(255,255,255,0.10); --line-on-dark-2: rgba(255,255,255,0.22);
  --accent: #f5b840; --accent-2: #ffc962; --accent-soft: rgba(245,184,64,0.14);
  --c-v: #6d4ec7; --c-m: #1565c0; --c-r: #c0392b;
  --c-ok: #15803d; --c-ok-bg: #dcfce7;
  --radius: 14px; --radius-sm: 8px;
  --shadow-sm: 0 1px 2px rgba(12,30,62,0.10);
  --shadow-md: 0 12px 32px -12px rgba(12,30,62,0.35);
  --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, system-ui, sans-serif;
  --font-serif: 'Source Serif 4', 'Cambria', Georgia, serif;
  --font-math: 'Cambria Math', 'Cambria', 'Times New Roman', Georgia, serif;
  --maxw: 1180px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-ui); color: var(--ink); background: var(--surface-alt); -webkit-font-smoothing: antialiased; line-height: 1.5; }
a { color: inherit; text-decoration: none; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- Nav ---------- */
.nav { position: sticky; top: 0; z-index: 50; background: var(--navy); border-bottom: 1px solid var(--line-on-dark); color: var(--on-dark); }
.nav .wrap { display: flex; align-items: center; gap: 28px; height: 62px; }
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-serif); font-size: 21px; font-weight: 600; letter-spacing: -0.01em; }
.brand-mark { width: 30px; height: 30px; border-radius: 7px; background: var(--accent); color: var(--navy); display: inline-flex; align-items: center; justify-content: center; font-family: var(--font-ui); font-weight: 800; font-size: 13px; letter-spacing: -0.04em; }
.brand em { font-style: normal; color: var(--accent); }
.nav-links { display: flex; gap: 4px; margin-left: 8px; }
.nav-links a { padding: 7px 11px; border-radius: 6px; font-size: 13.5px; font-weight: 500; color: var(--on-dark-2); white-space: nowrap; }
.nav-right .btn { white-space: nowrap; }
@media (max-width: 1240px) { .nav .wrap { gap: 18px; } .nav-links { margin-left: 0; gap: 2px; } .nav-links a { padding: 7px 8px; font-size: 13px; } }
.nav-links a:hover { color: var(--on-dark); background: rgba(255,255,255,0.06); }
.nav-links a.active { color: var(--on-dark); background: rgba(255,255,255,0.10); }
.nav-right { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.btn { display: inline-flex; align-items: center; gap: 7px; padding: 9px 16px; border-radius: var(--radius-sm); font-size: 13.5px; font-weight: 600; border: 1px solid var(--line-on-dark-2); background: transparent; color: var(--on-dark); cursor: pointer; transition: background 150ms, border-color 150ms, transform 100ms; font-family: inherit; }
.btn:hover { background: rgba(255,255,255,0.08); }
.btn:active { transform: translateY(1px); }
.btn-accent { background: var(--accent); color: var(--navy); border-color: var(--accent); }
.btn-accent:hover { background: var(--accent-2); }
.btn-light { border-color: var(--line); background: var(--surface); color: var(--ink); }
.btn-light:hover { background: var(--surface-alt); }
.btn-navy { background: var(--navy); color: #fff; border-color: var(--navy); }
.btn-navy:hover { background: var(--navy-3); }
.btn-lg { padding: 13px 24px; font-size: 15px; }
.nav-burger { display: none; }
@media (max-width: 1060px) {
  .nav-links { display: none; }
  .nav-links.open { display: flex; flex-direction: column; position: absolute; top: 62px; left: 0; right: 0; background: var(--navy); padding: 10px 16px 16px; border-bottom: 1px solid var(--line-on-dark-2); }
  .nav-burger { display: inline-flex; margin-left: auto; }
  .nav-right .btn-ghost-sm { display: none; }
}

/* ---------- Hero ---------- */
.hero { background: var(--navy); color: var(--on-dark); padding: 84px 0 92px; position: relative; overflow: hidden;
  background-image: radial-gradient(ellipse at 15% 20%, rgba(59,130,246,0.16), transparent 50%), radial-gradient(ellipse at 90% 90%, rgba(245,184,64,0.08), transparent 55%); }
.hero .wrap { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px; align-items: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; font-size: 11.5px; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); margin-bottom: 18px; }
.eyebrow::before { content: ''; width: 22px; height: 2px; background: var(--accent); }
.hero h1 { font-family: var(--font-serif); font-size: clamp(36px, 4.6vw, 54px); line-height: 1.08; letter-spacing: -0.02em; font-weight: 600; margin-bottom: 20px; }
.hero h1 em { font-style: italic; color: var(--accent); }
.hero p.lead { font-size: 17.5px; color: var(--on-dark-2); max-width: 540px; margin-bottom: 30px; line-height: 1.6; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.hero-note { font-size: 12.5px; color: var(--on-dark-3); margin-top: 16px; }
.hero-stats { display: flex; gap: 34px; margin-top: 42px; padding-top: 26px; border-top: 1px solid var(--line-on-dark); }
.stat b { display: block; font-family: var(--font-serif); font-size: 28px; font-weight: 600; color: var(--on-dark); line-height: 1; }
.stat span { font-size: 12px; color: var(--on-dark-3); margin-top: 6px; display: block; }
.hero-figure { background: var(--surface); border-radius: var(--radius); padding: 18px; box-shadow: 0 30px 60px -20px rgba(0,0,0,0.6); position: relative; }
.hero-figure::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; border-radius: var(--radius) var(--radius) 0 0; background: linear-gradient(90deg, var(--navy), var(--navy-3) 60%, var(--accent)); }
.hero-figure svg { width: 100%; height: auto; display: block; }
.hero-figure .cap { display: flex; justify-content: space-between; font-size: 11px; color: var(--ink-3); margin-top: 10px; padding-top: 10px; border-top: 1px solid var(--line); }
@media (max-width: 900px) { .hero .wrap { grid-template-columns: 1fr; } .hero { padding: 56px 0 64px; } }

/* ---------- Sections ---------- */
.section { padding: 72px 0; }
.section.alt { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { max-width: 640px; margin-bottom: 40px; }
.section-head h2 { font-family: var(--font-serif); font-size: 34px; font-weight: 600; letter-spacing: -0.02em; line-height: 1.15; margin-bottom: 12px; }
.section-head p { color: var(--ink-3); font-size: 16px; }
.grid { display: grid; gap: 18px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 980px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .grid-3, .grid-4 { grid-template-columns: 1fr; } }

/* Category cards */
.cat { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; display: flex; flex-direction: column; gap: 12px; box-shadow: var(--shadow-sm); transition: transform 180ms, box-shadow 180ms, border-color 180ms; position: relative; }
.cat:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--line-2); }
.cat-icon { width: 46px; height: 46px; border-radius: 10px; background: var(--surface-alt); border: 1px solid var(--line); display: flex; align-items: center; justify-content: center; }
.cat-icon svg { width: 28px; height: 28px; }
.cat h3 { font-family: var(--font-serif); font-size: 19px; font-weight: 600; }
.cat p { font-size: 13.5px; color: var(--ink-3); line-height: 1.5; flex: 1; }
.cat-meta { display: flex; align-items: center; justify-content: space-between; font-size: 12px; color: var(--ink-3); padding-top: 12px; border-top: 1px solid var(--line); }
.pill { display: inline-flex; align-items: center; gap: 5px; font-size: 11px; font-weight: 600; padding: 3px 9px; border-radius: 999px; letter-spacing: 0.03em; }
.pill-live { background: var(--c-ok-bg); color: var(--c-ok); }
.pill-soon { background: var(--surface-sunken); color: var(--ink-3); }
.pill-free { background: var(--accent-soft); color: #9a6b0a; border: 1px solid rgba(245,184,64,0.5); }
.pill-pro { background: var(--navy); color: #fff; }
.pill-fix { background: #fee2e2; color: #b91c1c; }

/* Feature list */
.feat { display: flex; gap: 16px; }
.feat-icon { flex-shrink: 0; width: 40px; height: 40px; border-radius: 10px; background: var(--navy); color: var(--accent); display: flex; align-items: center; justify-content: center; }
.feat-icon svg { width: 20px; height: 20px; }
.feat h4 { font-size: 15.5px; font-weight: 600; margin-bottom: 4px; }
.feat p { font-size: 13.5px; color: var(--ink-3); }

/* Pricing */
.plans { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; align-items: stretch; }
@media (max-width: 980px) { .plans { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .plans { grid-template-columns: 1fr; } }
.plan { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 24px; display: flex; flex-direction: column; gap: 14px; position: relative; box-shadow: var(--shadow-sm); }
.plan.featured { border-color: var(--navy); box-shadow: var(--shadow-md); }
.plan.featured::before { content: 'Most popular'; position: absolute; top: -12px; left: 22px; background: var(--accent); color: var(--navy); font-size: 11px; font-weight: 700; padding: 4px 10px; border-radius: 999px; letter-spacing: 0.05em; text-transform: uppercase; }
.plan h3 { font-family: var(--font-serif); font-size: 20px; font-weight: 600; }
.plan .price { display: flex; align-items: baseline; gap: 4px; }
.plan .price b { font-size: 40px; font-weight: 700; letter-spacing: -0.03em; line-height: 1; }
.plan .price span { font-size: 13px; color: var(--ink-3); }
.plan .desc { font-size: 13px; color: var(--ink-3); min-height: 38px; }
.plan ul { list-style: none; display: flex; flex-direction: column; gap: 8px; font-size: 13.5px; flex: 1; }
.plan li { display: flex; gap: 9px; align-items: flex-start; }
.plan li::before { content: ''; flex-shrink: 0; width: 16px; height: 16px; margin-top: 2px; border-radius: 50%; background: var(--c-ok-bg) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2315803d' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12l5 5L20 7'/%3E%3C/svg%3E") center/10px no-repeat; }
.plan li.no::before { background: var(--surface-sunken) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236c7f9c' stroke-width='3' stroke-linecap='round'%3E%3Cpath d='M6 12h12'/%3E%3C/svg%3E") center/10px no-repeat; }
.plan li.no { color: var(--ink-3); }

/* Catalog (section pages) */
.page-head { background: var(--navy); color: var(--on-dark); padding: 54px 0 46px; }
.page-head h1 { font-family: var(--font-serif); font-size: 40px; font-weight: 600; letter-spacing: -0.02em; margin-bottom: 10px; }
.page-head p { color: var(--on-dark-2); max-width: 620px; font-size: 16px; }
.crumbs { font-size: 12.5px; color: var(--on-dark-3); margin-bottom: 18px; display: flex; gap: 8px; }
.crumbs a:hover { color: var(--on-dark); }
.catalog { display: grid; grid-template-columns: 240px 1fr; gap: 36px; padding: 44px 0 80px; }
@media (max-width: 900px) { .catalog { grid-template-columns: 1fr; } .side { position: static !important; } }
.side { position: sticky; top: 84px; align-self: start; }
.side h4 { font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 10px; }
.side a { display: flex; justify-content: space-between; padding: 8px 10px; border-radius: 6px; font-size: 13.5px; color: var(--ink-2); }
.side a:hover { background: var(--surface); }
.side a small { color: var(--ink-3); font-size: 11px; }
.search { display: flex; align-items: center; gap: 8px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 9px 12px; margin-bottom: 22px; }
.search input { border: none; outline: none; font-family: inherit; font-size: 14px; flex: 1; background: transparent; color: var(--ink); }
.group { margin-bottom: 38px; }
.group h2 { font-family: var(--font-serif); font-size: 23px; font-weight: 600; margin-bottom: 4px; }
.group .sub { font-size: 13px; color: var(--ink-3); margin-bottom: 16px; }
.tools { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
@media (max-width: 1100px) { .tools { grid-template-columns: 1fr; } }
.tool { display: grid; grid-template-columns: 110px 1fr; gap: 16px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; transition: transform 160ms, box-shadow 160ms, border-color 160ms; }
.tool:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: var(--line-2); }
.tool.soon { opacity: 0.72; }
.tool.soon:hover { transform: none; box-shadow: none; }
.thumb { background: var(--surface-alt); border: 1px solid var(--line); border-radius: 8px; display: flex; align-items: center; justify-content: center; aspect-ratio: 1.3; }
.thumb svg { width: 96px; height: auto; }
.tool-body { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.tool-top { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.tool-num { font-size: 11px; font-weight: 600; color: var(--ink-3); letter-spacing: 0.06em; }
.tool h3 { font-size: 15px; font-weight: 600; line-height: 1.3; }
.tool p { font-size: 12.5px; color: var(--ink-3); line-height: 1.45; }
.tool-foot { margin-top: auto; display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--ink-3); flex-wrap: wrap; }
.tag { font-size: 10.5px; padding: 2px 7px; border-radius: 4px; background: var(--surface-alt); border: 1px solid var(--line); color: var(--ink-2); }
.empty-state { background: var(--surface); border: 1px dashed var(--line-2); border-radius: var(--radius); padding: 36px; text-align: center; color: var(--ink-3); }
.empty-state b { display: block; color: var(--ink); font-family: var(--font-serif); font-size: 20px; margin-bottom: 6px; }

/* Auth / forms */
.auth { max-width: 440px; margin: 64px auto 96px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 34px; box-shadow: var(--shadow-md); }
.auth h1 { font-family: var(--font-serif); font-size: 28px; font-weight: 600; margin-bottom: 6px; }
.auth p.sub { font-size: 13.5px; color: var(--ink-3); margin-bottom: 24px; }
.tabs { display: flex; background: var(--surface-alt); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 3px; margin-bottom: 22px; }
.tabs button { flex: 1; border: none; background: transparent; padding: 8px; font-family: inherit; font-size: 13px; font-weight: 600; color: var(--ink-3); border-radius: 6px; cursor: pointer; }
.tabs button.active { background: var(--navy); color: #fff; }
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 11.5px; font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase; color: var(--ink-2); margin-bottom: 6px; }
.field input { width: 100%; padding: 11px 13px; border: 1px solid var(--line); border-radius: var(--radius-sm); font-family: inherit; font-size: 15px; color: var(--ink); outline: none; background: var(--surface); }
.field input:focus { border-color: var(--navy); box-shadow: 0 0 0 3px var(--accent-soft); }
.form-note { font-size: 12px; color: var(--ink-3); margin-top: 14px; text-align: center; }
.notice { background: var(--accent-soft); border: 1px solid rgba(245,184,64,0.5); border-radius: var(--radius-sm); padding: 10px 13px; font-size: 12.5px; color: #7a5200; margin-bottom: 18px; }

/* CTA band */
.cta-band { background: var(--navy); color: var(--on-dark); padding: 64px 0; text-align: center; }
.cta-band h2 { font-family: var(--font-serif); font-size: 32px; font-weight: 600; margin-bottom: 10px; }
.cta-band p { color: var(--on-dark-2); margin-bottom: 24px; }

/* Footer */
.foot { background: #081227; color: var(--on-dark-3); padding: 44px 0 30px; font-size: 13px; }
.foot .wrap { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 28px; }
@media (max-width: 800px) { .foot .wrap { grid-template-columns: 1fr 1fr; } }
.foot h5 { color: var(--on-dark); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 12px; }
.foot a { display: block; padding: 3px 0; }
.foot a:hover { color: var(--on-dark); }
.foot .brand { color: var(--on-dark); margin-bottom: 10px; }
.foot-bottom { max-width: var(--maxw); margin: 30px auto 0; padding: 18px 24px 0; border-top: 1px solid var(--line-on-dark); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; font-size: 12px; }

/* Utilities */
.muted { color: var(--ink-3); }
.mt-1 { margin-top: 8px; } .mt-2 { margin-top: 16px; } .mt-3 { margin-top: 28px; }
.center { text-align: center; }
.lock { width: 12px; height: 12px; vertical-align: -1px; }

/* ---------- Legal / prose pages ---------- */
.legal { max-width: 760px; margin: 0 auto; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 40px 44px; box-shadow: var(--shadow-sm); }
.legal h2 { font-family: var(--font-serif); font-size: 21px; font-weight: 600; margin: 30px 0 8px; letter-spacing: -0.01em; }
.legal h2:first-child { margin-top: 0; }
.legal p, .legal li { font-size: 14.5px; color: var(--ink-2); line-height: 1.65; }
.legal p + p { margin-top: 10px; }
.legal ul { margin: 8px 0 0 20px; }
.legal li + li { margin-top: 4px; }
.legal a { color: var(--navy-3); text-decoration: underline; text-underline-offset: 2px; }
.legal .updated { font-size: 12.5px; color: var(--ink-3); margin-bottom: 22px; }
.legal .callout { background: var(--accent-soft); border: 1px solid rgba(245,184,64,0.5); border-radius: var(--radius-sm); padding: 12px 14px; margin: 14px 0; }
@media (max-width: 640px) { .legal { padding: 26px 20px; border-radius: 10px; } .page-head h1 { font-size: 32px; } }