/* Tamara Alenezi — structural portfolio.
   Visual language borrows from a construction drawing set: paper, ink, a sheet
   number on every section, and the rust "wind force" accent from her own details. */

:root {
  --paper: #f6f3ec;
  --paper-2: #efeadf;
  --card: #fffdf8;
  --ink: #14233b;
  --ink-2: #3c4a60;
  --ink-3: #6b7486;
  --rule: #d9d2c3;
  --grid: rgba(20, 35, 59, 0.05);
  --navy: #1e3a68;
  --accent: #c4561c;
  --accent-soft: #f6e2d4;
  --glass: #d6e7f2;
  --shadow: 0 1px 2px rgba(20, 35, 59, 0.06), 0 8px 24px rgba(20, 35, 59, 0.06);

  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", "JetBrains Mono", Menlo, Consolas, monospace;

  --wrap: 1120px;
  --gutter: clamp(16px, 4vw, 40px);
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0f1622;
    --paper-2: #131c2b;
    --card: #172133;
    --ink: #e9e5dc;
    --ink-2: #bfc5d0;
    --ink-3: #8a93a3;
    --rule: #2a3549;
    --grid: rgba(233, 229, 220, 0.04);
    --navy: #8fb0e6;
    --accent: #f08a4b;
    --accent-soft: #3a2518;
    --glass: #22374d;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.25);
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 72px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 24px 24px;
  color: var(--ink);
  font: 400 17px/1.65 var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--navy); text-underline-offset: 3px; }
a:hover { color: var(--accent); }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }

.skip {
  position: absolute; left: -999px; top: 8px; z-index: 100;
  background: var(--ink); color: var(--paper); padding: 8px 14px; border-radius: 4px;
}
.skip:focus { left: 8px; }

/* ---------- top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--rule);
}
.topbar .wrap { display: flex; align-items: center; gap: 24px; height: 60px; }
.mark {
  font: 600 15px/1 var(--serif); letter-spacing: 0.02em; color: var(--ink);
  text-decoration: none; white-space: nowrap;
}
.mark span { color: var(--ink-3); font-weight: 400; }
.nav { display: flex; gap: 4px; margin-left: auto; overflow-x: auto; scrollbar-width: none; }
.nav::-webkit-scrollbar { display: none; }
.nav a {
  font: 500 13px/1 var(--sans); letter-spacing: 0.04em; text-transform: uppercase;
  color: var(--ink-2); text-decoration: none; padding: 8px 10px; border-radius: 4px; white-space: nowrap;
}
.nav a:hover { background: var(--paper-2); color: var(--ink); }
@media (max-width: 720px) {
  .topbar .wrap { gap: 12px; }
  .mark span { display: none; }
}

/* ---------- hero ---------- */
.hero { padding: clamp(48px, 9vw, 112px) 0 clamp(40px, 6vw, 72px); }
.hero .wrap { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: clamp(32px, 5vw, 64px); align-items: center; }
@media (max-width: 860px) { .hero .wrap { grid-template-columns: 1fr; } }

.eyebrow {
  font: 500 12px/1.4 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent);
  margin: 0 0 18px;
}
.hero h1 {
  font: 500 clamp(44px, 7.5vw, 84px)/1.0 var(--serif); letter-spacing: -0.02em; margin: 0 0 14px;
}
.hero .role { font: 400 clamp(19px, 2.4vw, 24px)/1.35 var(--serif); color: var(--ink-2); margin: 0 0 24px; font-style: italic; }
.hero .lede { max-width: 56ch; color: var(--ink-2); margin: 0 0 32px; }

.actions { display: flex; flex-wrap: wrap; gap: 12px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font: 600 14px/1 var(--sans); letter-spacing: 0.02em; text-decoration: none;
  padding: 13px 18px; border-radius: 4px; border: 1px solid var(--ink); color: var(--ink);
}
.btn.primary { background: var(--ink); color: var(--paper); }
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn.primary:hover { background: var(--accent); color: #fff; }

.hero-figure { margin: 0; }
.hero-figure svg { width: 100%; height: auto; display: block; }
.hero-figure figcaption { font: 12px/1.5 var(--mono); color: var(--ink-3); margin-top: 10px; letter-spacing: 0.02em; }

/* hero drawing */
.dw-line { stroke: var(--ink); fill: none; }
.dw-thin { stroke: var(--ink-3); fill: none; stroke-width: 1; }
.dw-slab { fill: var(--ink); }
.dw-glass { fill: var(--glass); stroke: var(--ink-3); stroke-width: 0.75; }
.dw-wind { stroke: var(--accent); fill: none; stroke-width: 2; }
.dw-wind-head { fill: var(--accent); }
.dw-text { font: 11px var(--mono); fill: var(--ink-2); }
.dw-text-accent { font: 600 11px var(--mono); fill: var(--accent); }
.dw-bubble { fill: var(--card); stroke: var(--ink); stroke-width: 1; }
.dw-ground { stroke: var(--ink); stroke-width: 2; }
.dw-hatch { stroke: var(--ink-3); stroke-width: 0.75; }

/* ---------- key figures strip ---------- */
.strip { border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); background: var(--card); }
.strip .wrap { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat { padding: 24px 20px; border-left: 1px solid var(--rule); }
.stat:first-child { border-left: 0; padding-left: 0; }
.stat b { display: block; font: 500 clamp(26px, 3.4vw, 34px)/1.1 var(--serif); color: var(--ink); }
.stat span { display: block; font-size: 13px; color: var(--ink-3); margin-top: 6px; line-height: 1.45; }
@media (max-width: 760px) {
  .strip .wrap { grid-template-columns: 1fr 1fr; }
  .stat { padding: 18px 14px; }
  .stat:nth-child(odd) { border-left: 0; padding-left: 0; }
  .stat:nth-child(n+3) { border-top: 1px solid var(--rule); }
}

/* ---------- sections ---------- */
section.sheet { padding: clamp(64px, 9vw, 112px) 0 0; }
.sheet-head {
  display: grid; grid-template-columns: auto 1fr; gap: 0 20px; align-items: end;
  border-bottom: 2px solid var(--ink); padding-bottom: 14px; margin-bottom: 36px;
}
.sheet-no {
  grid-row: span 2; align-self: stretch;
  display: flex; flex-direction: column; justify-content: center;
  border: 1.5px solid var(--ink); padding: 8px 14px; min-width: 88px; text-align: center; background: var(--card);
}
.sheet-no small { font: 500 9px/1.2 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-3); }
.sheet-no strong { font: 500 26px/1.1 var(--serif); }
.sheet-head .kicker { font: 500 12px/1.4 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); }
.sheet-head h2 { font: 500 clamp(28px, 4vw, 42px)/1.1 var(--serif); margin: 4px 0 0; letter-spacing: -0.01em; }

.prose { max-width: 68ch; color: var(--ink-2); }
.prose p { margin: 0 0 1em; }
.prose strong { color: var(--ink); }

h3 { font: 500 24px/1.25 var(--serif); margin: 0 0 12px; }
h4 { font: 600 13px/1.4 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); margin: 0 0 10px; }

.card {
  background: var(--card); border: 1px solid var(--rule); border-radius: 6px; box-shadow: var(--shadow);
}

/* ---------- education ---------- */
.edu-top { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; margin-bottom: 48px; }
@media (max-width: 860px) { .edu-top { grid-template-columns: 1fr; gap: 28px; } }
.degree { padding: 28px; }
.degree .school { font: 500 26px/1.2 var(--serif); margin: 0 0 6px; }
.degree .program { color: var(--ink-2); margin: 0 0 20px; }
.degree dl { display: grid; grid-template-columns: auto 1fr; gap: 10px 20px; margin: 0; font-size: 15px; }
.degree dt { font: 500 11px/1.9 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-3); }
.degree dd { margin: 0; }

.courses { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 960px) { .courses { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .courses { grid-template-columns: 1fr; } }
.course { padding: 22px 22px 20px; }
.course .tag { font: 500 11px/1 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); margin-bottom: 12px; display: block; }
.course h3 { font-size: 20px; margin-bottom: 8px; }
.course p { margin: 0 0 14px; color: var(--ink-2); font-size: 15px; }
.course ul { margin: 0; padding: 0; list-style: none; border-top: 1px dashed var(--rule); padding-top: 12px; }
.course li { font: 13px/1.5 var(--mono); color: var(--ink-3); padding-left: 16px; position: relative; }
.course li::before { content: "—"; position: absolute; left: 0; color: var(--rule); }

/* ---------- capstone ---------- */
.project-intro { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
@media (max-width: 900px) { .project-intro { grid-template-columns: 1fr; gap: 28px; } }

.titleblock { overflow: hidden; }
.titleblock .tb-row { display: grid; grid-template-columns: 120px 1fr; border-top: 1px solid var(--rule); }
.titleblock .tb-row:first-child { border-top: 0; }
.titleblock .tb-k { font: 500 10px/1.4 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-3); padding: 12px 14px; background: var(--paper-2); }
.titleblock .tb-v { padding: 11px 14px; font-size: 15px; }
.titleblock .tb-v.big { font: 500 19px/1.3 var(--serif); }
.titleblock .me { font-weight: 700; color: var(--ink); }
.titleblock .muted { color: var(--ink-3); }

.figure { margin: 0; }
.figure .frame { background: #fff; border: 1px solid var(--rule); border-radius: 6px; padding: 12px; }
.figure figcaption { font: 12px/1.5 var(--mono); color: var(--ink-3); margin-top: 10px; }
.figure figcaption b { color: var(--ink-2); font-weight: 600; }

.team-results { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 40px; }
@media (max-width: 800px) { .team-results { grid-template-columns: 1fr; } }
.result { padding: 20px 22px; }
.result b { display: block; font: 500 30px/1.1 var(--serif); color: var(--navy); }
.result p { margin: 8px 0 0; font-size: 14px; color: var(--ink-2); }
.result small { display: block; margin-top: 10px; font: 11px/1.4 var(--mono); color: var(--ink-3); letter-spacing: 0.03em; }

/* ---------- wind basis ---------- */
.basis { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 40px; align-items: start; }
@media (max-width: 900px) { .basis { grid-template-columns: 1fr; } }
.params { padding: 6px 0; }
.params table { width: 100%; border-collapse: collapse; font-size: 15px; }
.params td { padding: 10px 20px; border-top: 1px solid var(--rule); }
.params tr:first-child td { border-top: 0; }
.params td:first-child { color: var(--ink-2); }
.params td:last-child { text-align: right; font-family: var(--mono); font-size: 14px; white-space: nowrap; }
.params tr.gov td { background: var(--accent-soft); font-weight: 600; color: var(--ink); }

.steps { counter-reset: s; list-style: none; padding: 0; margin: 0; }
.steps li { counter-increment: s; position: relative; padding: 0 0 18px 48px; color: var(--ink-2); }
.steps li::before {
  content: counter(s); position: absolute; left: 0; top: -2px;
  width: 30px; height: 30px; border: 1.5px solid var(--ink); border-radius: 50%;
  display: grid; place-items: center; font: 600 13px/1 var(--mono); color: var(--ink); background: var(--card);
}
.steps li::after { content: ""; position: absolute; left: 15px; top: 30px; bottom: 2px; width: 1px; background: var(--rule); }
.steps li:last-child::after { display: none; }
.steps strong { color: var(--ink); display: block; }
.formula { font: 14px var(--mono); background: var(--paper-2); padding: 2px 8px; border-radius: 3px; color: var(--ink); white-space: nowrap; }

/* ---------- systems ---------- */
.system { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; padding: 48px 0; border-top: 1px solid var(--rule); align-items: start; }
.system:first-of-type { border-top: 0; padding-top: 8px; }
.system.flip > .system-media { order: 2; }
@media (max-width: 900px) {
  .system { grid-template-columns: 1fr; gap: 24px; }
  .system.flip > .system-media { order: 0; }
}
.system-media { display: grid; gap: 16px; }
.system-media.two { grid-template-columns: 1.4fr 1fr; align-items: start; }
@media (max-width: 520px) { .system-media.two { grid-template-columns: 1fr; } }
.system .sys-no { font: 500 12px/1 var(--mono); letter-spacing: 0.12em; color: var(--accent); text-transform: uppercase; }
.system h3 { font-size: 30px; margin: 8px 0 6px; }
.system .sub { color: var(--ink-3); margin: 0 0 18px; font-size: 15px; }
.system p { color: var(--ink-2); margin: 0 0 18px; }

.specs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--rule); border: 1px solid var(--rule); border-radius: 6px; overflow: hidden; margin: 0 0 20px; }
@media (max-width: 520px) { .specs { grid-template-columns: repeat(2, 1fr); } }
.specs div { background: var(--card); padding: 12px 14px; }
.specs dt { font: 500 10px/1.3 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); }
.specs dd { margin: 4px 0 0; font: 500 17px/1.25 var(--serif); color: var(--ink); }

.loadpath { margin: 0 0 6px; }
.loadpath h4 { margin-bottom: 8px; }
.chain { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; padding: 0; margin: 0; }
.chain li {
  font: 500 13px/1 var(--sans); padding: 8px 10px; border-radius: 3px;
  background: var(--accent-soft); color: var(--ink); display: inline-flex; align-items: center;
}
.chain li + li::before { content: "→"; color: var(--accent); margin-right: 8px; margin-left: -2px; font-weight: 700; }

/* ---------- compare table ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--rule); border-radius: 6px; background: var(--card); box-shadow: var(--shadow); }
table.compare { border-collapse: collapse; width: 100%; min-width: 680px; font-size: 14px; }
.compare th, .compare td { padding: 12px 16px; text-align: left; border-top: 1px solid var(--rule); vertical-align: top; }
.compare thead th { border-top: 0; font: 500 10px/1.4 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-3); background: var(--paper-2); }
.compare td.num { font-family: var(--mono); font-size: 13px; white-space: nowrap; }
.compare th[scope="row"] { font: 500 16px/1.3 var(--serif); }

/* ---------- drift ---------- */
.drift { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; margin-top: 56px; align-items: start; }
@media (max-width: 900px) { .drift { grid-template-columns: 1fr; } }
.drift-chart { padding: 24px; }
.bar-row { display: grid; grid-template-columns: 110px 1fr; gap: 14px; align-items: center; margin-bottom: 16px; }
.bar-row:last-of-type { margin-bottom: 4px; }
.bar-label { font-size: 14px; color: var(--ink-2); line-height: 1.3; }
.bar-label small { display: block; font: 11px var(--mono); color: var(--ink-3); }
.bar-track { position: relative; height: 34px; }
.bar { height: 100%; border-radius: 0 3px 3px 0; background: var(--navy); display: flex; align-items: center; justify-content: flex-end; padding-right: 10px; color: var(--card); font: 600 13px/1 var(--mono); }
.bar.gov { background: var(--accent); color: #fff; }
.axis { display: flex; justify-content: space-between; margin-left: 124px; font: 11px var(--mono); color: var(--ink-3); border-top: 1px solid var(--rule); padding-top: 6px; }
.movement { margin-top: 20px; font-size: 14px; }
.movement table { width: 100%; border-collapse: collapse; }
.movement th, .movement td { text-align: left; padding: 9px 0; border-top: 1px solid var(--rule); vertical-align: top; }
.movement th { font: 500 10px/1.4 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-3); border-top: 0; }
.movement td + td, .movement th + th { padding-left: 14px; }
.ok { color: #2f7a4b; font-weight: 600; }
@media (prefers-color-scheme: dark) { .ok { color: #79c793; } }

/* ---------- skills ---------- */
.skills { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 900px) { .skills { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .skills { grid-template-columns: 1fr; } }
.skill { padding: 22px; }
.skill h3 { font-size: 19px; margin-bottom: 14px; }
.pills { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; margin: 0; padding: 0; }
.pills li { font: 13px/1 var(--sans); padding: 7px 10px; border: 1px solid var(--rule); border-radius: 999px; color: var(--ink-2); background: var(--paper); }
.pills li.applied { border-color: var(--accent); color: var(--ink); }
.pills li.applied::after { content: " ●"; color: var(--accent); font-size: 9px; vertical-align: 2px; }
.legend { margin-top: 18px; font: 12px var(--mono); color: var(--ink-3); }
.legend span { color: var(--accent); }

/* ---------- involvement ---------- */
.timeline { display: grid; gap: 16px; max-width: 820px; }
.tl { display: grid; grid-template-columns: 180px 1fr; gap: 24px; padding: 22px 24px; }
@media (max-width: 600px) { .tl { grid-template-columns: 1fr; gap: 6px; } }
.tl .when { font: 500 12px/1.6 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--accent); }
.tl h3 { font-size: 20px; margin-bottom: 4px; }
.tl .org-role { color: var(--ink-3); font-size: 14px; margin: 0 0 10px; }
.tl ul { margin: 0; padding-left: 18px; color: var(--ink-2); font-size: 15px; }

/* ---------- contact / footer ---------- */
.contact { padding: clamp(64px, 9vw, 112px) 0 clamp(48px, 6vw, 72px); }
.contact-card { padding: clamp(28px, 5vw, 48px); display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 32px; align-items: center; }
@media (max-width: 800px) { .contact-card { grid-template-columns: 1fr; } }
.contact-card h2 { font: 500 clamp(30px, 4.5vw, 46px)/1.1 var(--serif); margin: 0 0 12px; }
.contact-card p { color: var(--ink-2); margin: 0; max-width: 52ch; }
.contact-links { display: grid; gap: 10px; }
.contact-links .btn { justify-content: space-between; }

footer.tb-footer { border-top: 2px solid var(--ink); background: var(--card); }
.tb-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; }
.tb-grid > div { padding: 14px 16px; border-left: 1px solid var(--rule); }
.tb-grid > div:first-child { border-left: 0; padding-left: 0; }
.tb-grid small { display: block; font: 500 9px/1.4 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-3); }
.tb-grid span { font: 500 15px/1.4 var(--serif); }
@media (max-width: 720px) {
  .tb-grid { grid-template-columns: 1fr 1fr; }
  .tb-grid > div:nth-child(odd) { border-left: 0; padding-left: 0; }
  .tb-grid > div:nth-child(n+3) { border-top: 1px solid var(--rule); }
}
.fineprint { font: 12px/1.6 var(--sans); color: var(--ink-3); padding: 14px 0 28px; border-top: 1px solid var(--rule); }

/* tall section drawings shouldn't run a full phone screen when stacked */
@media (max-width: 520px) {
  .system-media.two .figure img { max-height: 440px; width: auto; margin: 0 auto; }
}

/* =====================================================================
   Multi-page additions: top bar actions, calc cards, sheet viewer,
   calculation pages, education page.
   ===================================================================== */

.topbar .nav { margin-left: auto; }
.nav a.active { color: var(--accent); }
.li-btn {
  flex: none; display: inline-flex; align-items: center; gap: 6px;
  font: 600 12px/1 var(--sans); letter-spacing: 0.04em; text-transform: uppercase;
  padding: 9px 12px; border-radius: 4px; background: var(--ink); color: var(--paper); text-decoration: none;
}
.li-btn:hover { background: var(--accent); color: #fff; }
.li-btn svg { width: 14px; height: 14px; }
@media (max-width: 520px) { .li-btn .li-text { display: none; } .li-btn { padding: 9px 10px; } }

.section-lede { max-width: 70ch; color: var(--ink-2); margin: -12px 0 32px; }

/* ---------- calculation cards (home) ---------- */
.calc-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 960px) { .calc-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .calc-grid { grid-template-columns: 1fr; } }
a.calc-card {
  display: flex; flex-direction: column; text-decoration: none; color: inherit; overflow: hidden;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
a.calc-card:hover { transform: translateY(-3px); border-color: var(--accent); color: inherit; }
a.calc-card:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.calc-card .thumb { aspect-ratio: 16 / 9; background: #fff; border-bottom: 1px solid var(--rule); overflow: hidden; }
.calc-card .thumb img { width: 100%; height: 100%; object-fit: cover; object-position: center top; }
.calc-card .body { padding: 20px 22px 22px; display: flex; flex-direction: column; flex: 1; }
.calc-card .tag { font: 500 11px/1 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); margin-bottom: 10px; }
.calc-card h3 { font-size: 21px; margin-bottom: 8px; }
.calc-card p { margin: 0 0 14px; color: var(--ink-2); font-size: 15px; }
.calc-card .eq { font: 13px/1.5 var(--mono); background: var(--paper-2); color: var(--ink); padding: 8px 10px; border-radius: 4px; margin-bottom: 14px; overflow-wrap: anywhere; }
.calc-card .foot { margin-top: auto; display: flex; justify-content: space-between; align-items: center; gap: 12px; padding-top: 12px; border-top: 1px dashed var(--rule); }
.calc-card .codes { font: 12px var(--mono); color: var(--ink-3); }
.calc-card .go { font: 600 13px var(--sans); color: var(--navy); white-space: nowrap; }
a.calc-card:hover .go { color: var(--accent); }
@media (prefers-reduced-motion: reduce) { a.calc-card { transition: none; } a.calc-card:hover { transform: none; } }

/* ---------- figure gallery ---------- */
.gallery { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 40px; }
.gallery.three { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 860px) { .gallery, .gallery.three { grid-template-columns: 1fr; } }
.figure .frame img { margin: 0 auto; }
.credit { font: 11px/1.4 var(--mono); color: var(--ink-3); letter-spacing: 0.03em; }

/* ---------- sheet viewer ---------- */
.viewer { position: relative; }
.viewer-track {
  display: flex; overflow-x: auto; scroll-snap-type: x mandatory; scroll-behavior: smooth;
  border: 1px solid var(--rule); border-radius: 8px; background: var(--card); box-shadow: var(--shadow);
  scrollbar-width: none;
}
.viewer-track::-webkit-scrollbar { display: none; }
@media (prefers-reduced-motion: reduce) { .viewer-track { scroll-behavior: auto; } }
.slide { flex: 0 0 100%; scroll-snap-align: start; margin: 0; padding: 16px; }
.slide a.sheet-link { display: block; background: #fff; border: 1px solid var(--rule); aspect-ratio: 2550 / 1650; }
.slide a.sheet-link img { width: 100%; height: 100%; object-fit: contain; }
.slide figcaption { display: flex; flex-wrap: wrap; gap: 6px 14px; align-items: baseline; padding: 12px 2px 0; }
.slide .s-no { font: 600 13px var(--mono); color: var(--ink); }
.slide .s-title { font: 500 17px/1.3 var(--serif); }
.slide .s-by { font: 12px var(--mono); color: var(--ink-3); margin-left: auto; }
.slide .s-by.hers { color: var(--accent); font-weight: 600; }

.viewer-bar { display: flex; align-items: center; gap: 12px; margin-top: 16px; }
.v-btn {
  flex: none; width: 46px; height: 46px; border-radius: 50%; border: 1.5px solid var(--ink); background: var(--card); color: var(--ink);
  display: grid; place-items: center; cursor: pointer; font: 600 20px/1 var(--sans);
}
.v-btn:hover:not(:disabled) { background: var(--ink); color: var(--paper); }
.v-btn:disabled { opacity: 0.35; cursor: default; }
.v-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.v-count { font: 600 14px var(--mono); min-width: 64px; text-align: center; }
.v-dots { display: flex; gap: 6px; overflow-x: auto; flex: 1; padding: 4px 2px; scrollbar-width: thin; }
.v-dot {
  flex: none; font: 500 11px/1 var(--mono); padding: 7px 8px; border-radius: 3px; cursor: pointer;
  border: 1px solid var(--rule); background: var(--paper); color: var(--ink-2);
}
.v-dot.hers { border-color: var(--accent); }
.v-dot[aria-current="true"] { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.viewer-note { font: 12px var(--mono); color: var(--ink-3); margin-top: 10px; }
.viewer-note span { color: var(--accent); }

/* ---------- education teaser ---------- */
.edu-teaser { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
@media (max-width: 860px) { .edu-teaser { grid-template-columns: 1fr; } }
.chips { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; margin: 0 0 24px; padding: 0; }
.chips li a, .chips li span {
  display: inline-block; font: 500 12px/1 var(--mono); padding: 8px 10px; border-radius: 3px;
  border: 1px solid var(--rule); background: var(--card); color: var(--ink); text-decoration: none;
}
.chips li a:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- inner pages ---------- */
.page-head { padding: clamp(40px, 7vw, 80px) 0 clamp(28px, 4vw, 44px); border-bottom: 1px solid var(--rule); }
.crumbs { font: 12px var(--mono); color: var(--ink-3); margin: 0 0 18px; letter-spacing: 0.04em; }
.crumbs a { color: var(--ink-3); }
.page-head h1 { font: 500 clamp(36px, 6vw, 64px)/1.05 var(--serif); margin: 0 0 16px; letter-spacing: -0.02em; }
.page-head .lede { max-width: 66ch; color: var(--ink-2); font-size: 18px; margin: 0 0 24px; }
.meta-row { display: flex; flex-wrap: wrap; gap: 10px 28px; font-size: 14px; }
.meta-row div small { display: block; font: 500 10px/1.6 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-3); }
.meta-row a { font-weight: 500; }

.toc { position: sticky; top: 76px; align-self: start; font-size: 14px; }
.toc h4 { margin-bottom: 12px; }
.toc ol { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--rule); }
.toc li a { display: block; padding: 6px 0 6px 14px; color: var(--ink-2); text-decoration: none; margin-left: -1px; border-left: 2px solid transparent; }
.toc li a:hover { color: var(--accent); border-left-color: var(--accent); }
.doc { display: grid; grid-template-columns: 220px 1fr; gap: 56px; padding-top: 48px; }
@media (max-width: 960px) { .doc { grid-template-columns: 1fr; gap: 0; } .toc { display: none; } }
.doc-body { min-width: 0; }

.step { padding: 0 0 56px; }
.step + .step { border-top: 1px solid var(--rule); padding-top: 48px; }
.step-head { display: flex; gap: 16px; align-items: baseline; margin-bottom: 14px; }
.step-no { font: 600 12px var(--mono); color: var(--accent); letter-spacing: 0.1em; white-space: nowrap; }
.step h2 { font: 500 clamp(24px, 3vw, 32px)/1.2 var(--serif); margin: 0; }
.step p, .step li { color: var(--ink-2); }
.step p { max-width: 72ch; }
.step ul, .step ol { max-width: 72ch; padding-left: 20px; }
.step li { margin-bottom: 6px; }
.step strong { color: var(--ink); }
.step .figure { margin: 24px 0; }
.step .figure.narrow { max-width: 560px; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: start; margin: 24px 0; }
@media (max-width: 760px) { .two-col { grid-template-columns: 1fr; } }
.two-col .figure { margin: 0; }

.calc {
  font: 14.5px/1.9 var(--mono); background: var(--card); border: 1px solid var(--rule); border-left: 3px solid var(--navy);
  border-radius: 4px; padding: 16px 20px; margin: 20px 0; overflow-x: auto; color: var(--ink);
}
.calc .c-label { display: block; font: 600 10px/1.6 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 4px; }
.calc .ln { display: block; white-space: nowrap; }
.calc .res { color: var(--accent); font-weight: 600; }
.calc .ok { font-weight: 600; }
.calc .bad { color: #b3261e; font-weight: 600; }
@media (prefers-color-scheme: dark) { .calc .bad { color: #ff8a80; } }
.calc .note { color: var(--ink-3); }

.data { width: 100%; border-collapse: collapse; font-size: 14px; }
.data th, .data td { padding: 10px 14px; text-align: left; border-top: 1px solid var(--rule); vertical-align: top; }
.data thead th { border-top: 0; font: 500 10px/1.4 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-3); background: var(--paper-2); }
.data td.num, .data th.num { text-align: right; font-family: var(--mono); font-size: 13px; white-space: nowrap; }
.data tr.total td { font-weight: 600; color: var(--ink); background: var(--paper-2); }
.data tr.hl td { background: var(--accent-soft); color: var(--ink); font-weight: 600; }
.step .table-wrap { margin: 20px 0; }
.step .table-wrap table { min-width: 560px; }

.callout { border: 1px solid var(--rule); border-left: 3px solid var(--accent); background: var(--card); padding: 14px 18px; border-radius: 4px; margin: 20px 0; font-size: 15px; color: var(--ink-2); max-width: 72ch; }
.callout b { color: var(--ink); }
.sheet-ref { font: 12px var(--mono); }

.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; padding: 40px 0 0; border-top: 2px solid var(--ink); margin-top: 24px; }
.pager a { display: block; padding: 18px 20px; text-decoration: none; color: var(--ink); }
.pager a small { display: block; font: 500 10px/1.6 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-3); }
.pager a span { font: 500 19px/1.3 var(--serif); }
.pager a:hover { border-color: var(--accent); }
.pager .next { text-align: right; grid-column: 2; }

/* ---------- calculator ---------- */
.calculator { display: grid; grid-template-columns: 1fr 1fr; gap: 0; overflow: hidden; margin: 24px 0; }
@media (max-width: 860px) { .calculator { grid-template-columns: 1fr; } }
.calc-in { padding: 22px; border-right: 1px solid var(--rule); }
@media (max-width: 860px) { .calc-in { border-right: 0; border-bottom: 1px solid var(--rule); } }
.calc-out { padding: 22px; background: var(--paper-2); }
.calc-in fieldset { border: 0; padding: 0; margin: 0 0 18px; }
.calc-in legend { font: 600 10px/1.6 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); margin-bottom: 8px; padding: 0; }
.fields { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 14px; }
.fields label { display: grid; gap: 4px; font-size: 13px; color: var(--ink-2); }
.fields input {
  font: 14px var(--mono); padding: 8px 10px; border: 1px solid var(--rule); border-radius: 4px; background: var(--card); color: var(--ink); width: 100%;
}
.fields input:focus { outline: 2px solid var(--accent); outline-offset: 0; border-color: var(--accent); }
.calc-out dl { margin: 0; display: grid; grid-template-columns: 1fr auto; gap: 0; }
.calc-out dt, .calc-out dd { padding: 9px 0; border-top: 1px solid var(--rule); font-size: 14px; }
.calc-out dt { color: var(--ink-2); }
.calc-out dd { margin: 0; text-align: right; font: 600 14px var(--mono); color: var(--ink); }
.calc-out dt.gov, .calc-out dd.gov { color: var(--accent); }
.calc-out .match { margin-top: 14px; font: 12px var(--mono); color: var(--ink-3); }
.calc-out .match.yes { color: #2f7a4b; }
@media (prefers-color-scheme: dark) { .calc-out .match.yes { color: #79c793; } }
.btn.small { padding: 9px 12px; font-size: 12px; margin-top: 4px; cursor: pointer; background: transparent; }

/* ---------- education page ---------- */
.course-group { padding: 56px 0 0; }
.course-group > h2 { font: 500 clamp(26px, 3.4vw, 36px)/1.15 var(--serif); margin: 0 0 8px; }
.course-group > p { color: var(--ink-2); max-width: 70ch; margin: 0 0 28px; }
.course-list { display: grid; gap: 18px; }
.course-d { display: grid; grid-template-columns: 150px 1fr; gap: 28px; padding: 24px 26px; scroll-margin-top: 80px; }
@media (max-width: 700px) { .course-d { grid-template-columns: 1fr; gap: 10px; padding: 20px; } }
.course-d .code { font: 600 20px/1.1 var(--serif); color: var(--ink); }
.course-d .cr { display: block; font: 11px/1.8 var(--mono); color: var(--ink-3); letter-spacing: 0.06em; text-transform: uppercase; }
.course-d h3 { font-size: 22px; margin: 0 0 8px; }
.course-d p { margin: 0 0 12px; color: var(--ink-2); max-width: 72ch; }
.course-d .learned { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; margin: 0 0 12px; padding: 0; }
.course-d .learned li { font: 12px/1 var(--sans); padding: 6px 9px; border-radius: 999px; background: var(--paper-2); color: var(--ink-2); }
.course-d .applied-in { font-size: 14px; color: var(--ink-3); margin: 0; }
.course-d .applied-in a { font-weight: 500; }
.foundations { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: 0; }
.foundations li { font: 13px var(--sans); padding: 8px 12px; border: 1px solid var(--rule); border-radius: 4px; background: var(--card); }
.foundations li b { font-family: var(--mono); font-weight: 600; margin-right: 6px; }
.gallery .frame img { max-height: 400px; width: auto; }