/* ISTQB with Girish
   Layout concept: a test report. Ink-navy bands frame a cool paper page;
   credentials read like a test run (case, code, PASS), with one amber highlighter mark per screen. */
:root {
  --paper: #f4f6fa;
  --surface: #ffffff;
  --tint: #e9eef7;
  --ink: #14213d;
  --ink-soft: #46536e;
  --line: #d3dbe8;
  --accent: #2b59c3;
  --accent-ink: #ffffff;
  --marker: #f6b73c;
  --pass: #17804f;
  --pass-bg: #e2f4ea;
  --band: #14213d;
  --band-fg: #e8edf7;
  --band-soft: #a9b6cf;

  --f-display: "Bricolage Grotesque", "Avenir Next", "Segoe UI", system-ui, sans-serif;
  --f-body: "IBM Plex Sans", "Segoe UI", Roboto, system-ui, sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --step--1: 0.875rem;
  --step-0: 1rem;
  --step-1: 1.2rem;
  --step-2: 1.5rem;
  --step-3: clamp(1.8rem, 1.3rem + 2vw, 2.5rem);
  --step-4: clamp(2.2rem, 1.4rem + 3.4vw, 3.6rem);

  --radius: 10px;
  --max: 1160px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0c1322; --surface: #141d31; --tint: #111a2c; --ink: #e7ecf5; --ink-soft: #a5b1c8;
    --line: #26324b; --accent: #7ea2f5; --accent-ink: #0c1322; --marker: #e7a92f;
    --pass: #5fd39a; --pass-bg: #123326; --band: #070c17; --band-fg: #e7ecf5; --band-soft: #8f9cb6;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #0c1322; --surface: #141d31; --tint: #111a2c; --ink: #e7ecf5; --ink-soft: #a5b1c8;
  --line: #26324b; --accent: #7ea2f5; --accent-ink: #0c1322; --marker: #e7a92f;
  --pass: #5fd39a; --pass-bg: #123326; --band: #070c17; --band-fg: #e7ecf5; --band-soft: #8f9cb6;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 var(--step-0)/1.65 var(--f-body);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); }
h1, h2, h3 { font-family: var(--f-display); line-height: 1.12; margin: 0; text-wrap: balance; letter-spacing: -0.015em; }
h1 { font-size: var(--step-4); font-weight: 800; }
h2 { font-size: var(--step-3); font-weight: 700; }
h3 { font-size: var(--step-1); font-weight: 700; }
p { margin: 0; }
.mono { font-family: var(--f-mono); }
:focus-visible { outline: 3px solid var(--marker); outline-offset: 2px; border-radius: 4px; }

.wrap {
  max-width: var(--max);
  margin-inline: auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}
@media (min-width: 720px) {
  .wrap { padding-left: max(32px, env(safe-area-inset-left, 0px)); padding-right: max(32px, env(safe-area-inset-right, 0px)); }
}

.skip { position: absolute; left: -999px; top: 8px; background: var(--surface); padding: 8px 12px; z-index: 50; }
.skip:focus { left: 16px; }

.eyebrow {
  font-family: var(--f-mono);
  font-size: var(--step--1);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.25rem;
  border-radius: 999px;
  background: var(--accent);
  color: var(--accent-ink);
  border: 2px solid var(--accent);
  font: 600 var(--step-0)/1.2 var(--f-body);
  text-decoration: none;
  cursor: pointer;
  transition: transform .15s ease, background-color .15s ease, color .15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--accent); }
.btn-ghost:hover { background: var(--accent); color: var(--accent-ink); }
.btn-small { padding: 0.5rem 1rem; font-size: var(--step--1); }

/* Header */
.site-header {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding-block: 0.75rem; }
.brand { display: inline-flex; align-items: center; gap: 0.55rem; text-decoration: none; color: var(--ink); font: 700 1.15rem/1 var(--f-display); }
.brand em { font-style: normal; font-weight: 500; color: var(--ink-soft); }
.brand-mark {
  display: grid; place-items: center; width: 30px; height: 30px; border-radius: 8px;
  background: var(--pass); color: var(--surface); font-size: 1rem;
}
.site-nav { display: flex; align-items: center; gap: 1.4rem; }
.site-nav a:not(.btn) { color: var(--ink-soft); text-decoration: none; font-weight: 500; font-size: 0.95rem; }
.site-nav a:not(.btn):hover { color: var(--ink); }
.nav-toggle { display: none; }
@media (max-width: 1100px) {
  .nav-toggle {
    display: inline-block; background: none; border: 1px solid var(--line); color: var(--ink);
    border-radius: 999px; padding: 0.45rem 0.9rem; font: 500 0.9rem var(--f-body); cursor: pointer;
  }
  .site-nav {
    display: none; position: absolute; left: 0; right: 0; top: 100%;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--surface); border-bottom: 1px solid var(--line);
    padding: 0.5rem max(16px, env(safe-area-inset-right, 0px)) 1rem max(16px, env(safe-area-inset-left, 0px));
  }
  .site-nav.open { display: flex; }
  .site-nav a:not(.btn) { padding: 0.75rem 0; border-bottom: 1px solid var(--line); }
  .site-nav .btn { margin-top: 0.75rem; }
}

/* Hero */
.hero { padding-block: clamp(2.5rem, 6vw, 5rem); }
.hero-grid { display: grid; gap: clamp(2rem, 5vw, 4rem); grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); align-items: center; }
.hero-copy { display: flex; flex-direction: column; gap: 1.4rem; min-width: 0; }
.hero-copy .eyebrow { margin-bottom: 0; }
.hl { background: linear-gradient(transparent 62%, var(--marker) 62%, var(--marker) 92%, transparent 92%); padding-inline: 0.06em; }
.lede { font-size: var(--step-1); color: var(--ink-soft); max-width: 62ch; line-height: 1.6; }
.cta-row { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.hero-facts { list-style: none; margin: 0.5rem 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.5rem 2.5rem; }
.hero-facts li { display: flex; flex-direction: column; }
.hero-facts strong { font: 800 2.2rem/1 var(--f-display); font-variant-numeric: tabular-nums; }
.hero-facts span { font-size: var(--step--1); color: var(--ink-soft); }

.hero-card { margin: 0; position: relative; min-width: 0; }
.portrait { border-radius: 18px; overflow: hidden; aspect-ratio: 1 / 1; max-width: 100%; background: var(--tint); }
.portrait img { width: 100%; height: 100%; object-fit: cover; }
.report {
  position: relative;
  margin: -4.5rem 1rem 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 18px 40px -18px rgb(20 33 61 / 0.45);
  padding: 1rem 1.1rem 0.9rem;
}
.report-head { display: flex; justify-content: space-between; align-items: center; gap: 0.5rem; font-size: 0.75rem; color: var(--ink-soft); letter-spacing: 0.04em; padding-bottom: 0.6rem; border-bottom: 1px dashed var(--line); }
.badge-pass { font: 600 0.72rem/1 var(--f-mono); background: var(--pass-bg); color: var(--pass); padding: 0.35rem 0.55rem; border-radius: 6px; letter-spacing: 0.06em; }
.report-list { list-style: none; margin: 0; padding: 0; }
.report-list li {
  display: grid; grid-template-columns: 2.6rem minmax(0, 1fr) auto auto; align-items: center; gap: 0.6rem;
  padding: 0.55rem 0; border-bottom: 1px solid var(--line); font-size: 0.9rem;
}
.report-list li:last-child { border-bottom: 0; }
.tc { color: var(--ink-soft); font-size: 0.78rem; text-transform: uppercase; }
.tc-name { font-weight: 500; min-width: 0; }
.tc-code { font-size: 0.75rem; color: var(--ink-soft); }
.pass { font: 600 0.72rem/1 var(--f-mono); color: var(--pass); letter-spacing: 0.06em; }
.report-foot { font-size: 0.72rem; color: var(--ink-soft); padding-top: 0.6rem; border-top: 1px dashed var(--line); }

@media (prefers-reduced-motion: no-preference) {
  .report-list li { animation: tick .5s ease both; }
  .report-list li:nth-child(2) { animation-delay: .12s; }
  .report-list li:nth-child(3) { animation-delay: .24s; }
  .report-list li:nth-child(4) { animation-delay: .36s; }
  @keyframes tick { from { transform: translateX(6px); opacity: .35; } to { transform: none; opacity: 1; } }
}

@media (max-width: 860px) {
  .hero-grid { grid-template-columns: minmax(0, 1fr); }
  .hero-card { max-width: 460px; }
}
@media (max-width: 420px) {
  .report { margin-inline: 0.5rem; }
  .tc-code { display: none; }
  .report-list li { grid-template-columns: 2.4rem minmax(0, 1fr) auto; }
}

/* Sections */
.section { padding-block: clamp(3.5rem, 8vw, 6rem); }
.section > .wrap > h2 { max-width: 24ch; }
.section-lede { color: var(--ink-soft); max-width: 62ch; margin-top: 1rem; font-size: 1.05rem; }
.section-tint { background: var(--tint); }
.section-ink { background: var(--band); color: var(--band-fg); }
.section-ink .eyebrow { color: var(--marker); }
.note { margin-top: 1rem; font-size: var(--step--1); color: var(--ink-soft); }

/* Cert table */
.table-scroll { overflow-x: auto; margin-top: 2rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.cert-table { width: 100%; border-collapse: collapse; min-width: 720px; font-size: 0.95rem; }
.cert-table th, .cert-table td { text-align: left; padding: 1rem 1.1rem; border-bottom: 1px solid var(--line); vertical-align: top; }
.cert-table thead th { font: 500 0.75rem/1.2 var(--f-mono); text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-soft); background: var(--tint); }
.cert-table tbody tr:last-child > * { border-bottom: 0; }
.cert-table tbody th { font-weight: 600; }
.cert-table td { color: var(--ink-soft); }
.cert-table .num { font-variant-numeric: tabular-nums; white-space: nowrap; color: var(--ink); }
.cert-table td.mono { font-size: 0.85rem; color: var(--ink); white-space: nowrap; }
.code {
  display: inline-block; margin-right: 0.5rem; padding: 0.15rem 0.45rem; border-radius: 5px;
  font: 600 0.75rem/1.4 var(--f-mono); background: var(--pass-bg); color: var(--pass);
}

/* Method */
.method-grid { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: clamp(2rem, 5vw, 4.5rem); align-items: start; }
.method-intro { display: flex; flex-direction: column; gap: 1rem; position: sticky; top: 100px; }
.method-intro .eyebrow { margin-bottom: -0.25rem; }
.method-intro p:not(.eyebrow) { color: var(--ink-soft); max-width: 58ch; }
.steps { list-style: none; margin: 0; padding: 0; counter-reset: step; display: flex; flex-direction: column; }
.steps li {
  counter-increment: step;
  display: grid; grid-template-columns: 3.2rem minmax(0, 1fr); column-gap: 1rem; row-gap: 0.35rem;
  padding-block: 1.4rem; border-top: 1px solid var(--line);
}
.steps li:last-child { border-bottom: 1px solid var(--line); }
.steps li::before {
  content: "0" counter(step);
  grid-row: span 2;
  font: 500 0.95rem/1.6 var(--f-mono); color: var(--accent);
}
.steps p { color: var(--ink-soft); }
@media (max-width: 860px) {
  .method-grid { grid-template-columns: minmax(0, 1fr); }
  .method-intro { position: static; }
}

/* Benefits */
.benefit-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.25rem; margin-top: 2.25rem; }
.benefit { display: flex; flex-direction: column; gap: 0.75rem; padding: 1.5rem; border-top: 3px solid var(--ink); background: var(--surface); }
.benefit-tag { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--accent); }
.benefit ul { margin: 0.25rem 0 0; padding-left: 1.1rem; color: var(--ink-soft); display: flex; flex-direction: column; gap: 0.5rem; }
@media (max-width: 860px) { .benefit-grid { grid-template-columns: minmax(0, 1fr); } }

/* Experience */
.exp-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: clamp(2rem, 5vw, 4rem); }
.exp-intro { display: flex; flex-direction: column; gap: 1rem; }
.exp-intro .eyebrow { margin-bottom: -0.25rem; }
.exp-intro p:not(.eyebrow) { color: var(--band-soft); max-width: 58ch; }
.chips { list-style: none; padding: 0; margin: 0.5rem 0 0; display: flex; flex-wrap: wrap; gap: 0.45rem; }
.chips li { font: 500 0.78rem/1 var(--f-mono); padding: 0.45rem 0.65rem; border: 1px solid color-mix(in srgb, var(--band-fg) 25%, transparent); border-radius: 999px; color: var(--band-fg); }
.exp-list { list-style: none; margin: 0; padding: 0; }
.exp-list li {
  display: grid; grid-template-columns: 7.5rem minmax(0, 1fr); column-gap: 1rem; row-gap: 0.15rem;
  padding-block: 1rem; border-bottom: 1px solid color-mix(in srgb, var(--band-fg) 16%, transparent);
}
.exp-list li:first-child { padding-top: 0; }
.exp-list span { grid-row: span 2; font-size: 0.8rem; color: var(--marker); padding-top: 0.2rem; font-variant-numeric: tabular-nums; }
.exp-list em { font-style: normal; color: var(--band-soft); font-size: 0.92rem; }
@media (max-width: 860px) { .exp-grid { grid-template-columns: minmax(0, 1fr); } }
@media (max-width: 480px) {
  .exp-list li { grid-template-columns: minmax(0, 1fr); }
  .exp-list span { grid-row: auto; }
}

/* Pricing */
.pricing-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 1.5rem; flex-wrap: wrap; }
.pricing-head > div:first-child { min-width: 0; max-width: 680px; }
.currency { display: inline-flex; border: 1px solid var(--line); border-radius: 999px; padding: 4px; background: var(--surface); }
.cur-btn { border: 0; background: transparent; color: var(--ink-soft); font: 600 0.9rem/1 var(--f-body); padding: 0.55rem 0.95rem; border-radius: 999px; cursor: pointer; }
.cur-btn[aria-pressed="true"] { background: var(--ink); color: var(--paper); }

.price-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1rem; margin-top: 2.25rem; }
.plan {
  display: flex; flex-direction: column; gap: 0.7rem;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.4rem;
}
.plan-code { font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--pass); }
.plan h3 { font-size: 1.15rem; }
.price { font: 800 2rem/1.1 var(--f-display); font-variant-numeric: tabular-nums; letter-spacing: -0.02em; }
.price-text { font-size: 1.5rem; }
.plan ul { margin: 0; padding-left: 1.1rem; color: var(--ink-soft); font-size: 0.93rem; display: flex; flex-direction: column; gap: 0.35rem; flex: 1; }
.plan > p:not(.plan-code):not(.price) { color: var(--ink-soft); font-size: 0.93rem; flex: 1; }
.plan .btn { margin-top: 0.4rem; }

.extras { display: grid; grid-template-columns: minmax(0, 2fr) repeat(2, minmax(0, 1fr)); gap: 1rem; margin-top: 1rem; }
.plan-feature { background: var(--band); color: var(--band-fg); border-color: var(--band); flex-direction: row; gap: 1.5rem; align-items: flex-end; justify-content: space-between; flex-wrap: wrap; }
.plan-feature > div:first-child { display: flex; flex-direction: column; gap: 0.6rem; flex: 1 1 260px; min-width: 0; }
.plan-feature .plan-code { color: var(--marker); }
.plan-feature p:not(.plan-code) { color: var(--band-soft); }
.plan-feature-price { display: flex; flex-direction: column; gap: 0.7rem; align-items: flex-start; }
.plan-feature-price .price { color: var(--band-fg); }
.plan-feature .btn { background: var(--marker); border-color: var(--marker); color: #14213d; }
@media (max-width: 1020px) {
  .price-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .extras { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .plan-feature { grid-column: 1 / -1; }
}
@media (max-width: 560px) {
  .price-grid, .extras { grid-template-columns: minmax(0, 1fr); }
}

/* Booking */
.book-grid { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: clamp(2rem, 5vw, 4rem); align-items: start; }
.book-intro { display: flex; flex-direction: column; gap: 1rem; align-items: flex-start; }
.book-intro .eyebrow { margin-bottom: -0.25rem; }
.book-intro > p:not(.eyebrow) { color: var(--ink-soft); max-width: 52ch; }
.contact-alt { display: flex; flex-direction: column; gap: 0.45rem; margin-top: 0.75rem; color: var(--ink-soft); font-size: 0.95rem; }
.copy-row { display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap; }
.copy-row .mono { color: var(--ink); user-select: all; word-break: break-all; }
.copy-btn { border: 1px solid var(--line); background: var(--surface); color: var(--ink); border-radius: 6px; padding: 0.3rem 0.65rem; font: 500 0.8rem var(--f-body); cursor: pointer; }

.book-form {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(1.25rem, 3vw, 2rem);
}
.field { display: flex; flex-direction: column; gap: 0.4rem; min-width: 0; }
.field-wide { grid-column: 1 / -1; }
.field label { font-weight: 600; font-size: 0.9rem; }
.opt { font-weight: 400; color: var(--ink-soft); }
.field input, .field select, .field textarea {
  font: 400 1rem/1.4 var(--f-body); color: var(--ink); background: var(--paper);
  border: 1px solid var(--line); border-radius: 8px; padding: 0.7rem 0.8rem; width: 100%;
}
.field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid var(--accent); outline-offset: 0; border-color: var(--accent); }
.form-error { color: #c0392b; font-weight: 500; font-size: 0.92rem; }
.form-hint { font-size: 0.82rem; color: var(--ink-soft); text-align: center; }
@media (max-width: 860px) { .book-grid { grid-template-columns: minmax(0, 1fr); } }
@media (max-width: 520px) { .book-form { grid-template-columns: minmax(0, 1fr); } }

/* FAQ */
.faq-wrap { max-width: 820px; }
.faq-wrap h2 { margin-bottom: 1.5rem; }
details { border-top: 1px solid var(--line); }
details:last-of-type { border-bottom: 1px solid var(--line); }
summary {
  list-style: none; cursor: pointer; padding: 1.15rem 2rem 1.15rem 0; position: relative;
  font: 600 1.08rem/1.4 var(--f-body);
}
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; position: absolute; right: 0.25rem; top: 1rem; font: 400 1.4rem/1 var(--f-mono); color: var(--accent); }
details[open] summary::after { content: "–"; }
details p { padding-bottom: 1.2rem; color: var(--ink-soft); max-width: 65ch; }

/* Footer */
.site-footer { background: var(--band); color: var(--band-soft); }
.footer-inner { padding-block: 2.5rem; display: flex; flex-direction: column; gap: 0.5rem; }
.site-footer strong { color: var(--band-fg); }
.small { font-size: 0.82rem; max-width: 70ch; }

/* Header tools */
.header-tools { display: flex; align-items: center; gap: 0.5rem; order: 2; }
.site-nav { order: 1; margin-left: auto; }
.theme-toggle {
  width: 36px; height: 36px; border-radius: 999px; border: 1px solid var(--line);
  background: var(--surface); color: var(--ink); font-size: 1.05rem; cursor: pointer; display: grid; place-items: center;
}
@media (max-width: 1100px) { .site-nav { margin-left: 0; } .header-tools { margin-left: auto; } }

/* Reading progress: a test run */
.run-bar { position: fixed; top: 0; left: 0; right: 0; height: 3px; z-index: 30; background: transparent; pointer-events: none; }
.run-bar span { display: block; height: 100%; width: 0; background: var(--pass); transition: width .1s linear; }

/* What you get */
.kit-grid { list-style: none; margin: 2.25rem 0 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.kit { background: var(--surface); padding: 1.6rem; display: flex; flex-direction: column; gap: 0.6rem; transition: background-color .2s ease; }
.kit:hover { background: var(--tint); }
.kit-label { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--pass); }
.kit p:not(.kit-label) { color: var(--ink-soft); font-size: 0.95rem; }
@media (max-width: 900px) { .kit-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .kit-grid { grid-template-columns: minmax(0, 1fr); } }

/* Syllabus tabs */
.tabs { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 2rem; }
.tabs [role="tab"] {
  font: 600 0.9rem/1 var(--f-mono); padding: 0.75rem 1.1rem; border-radius: 8px 8px 0 0;
  border: 1px solid var(--line); border-bottom: 0; background: transparent; color: var(--ink-soft); cursor: pointer;
}
.tabs [role="tab"][aria-selected="true"] { background: var(--surface); color: var(--ink); box-shadow: inset 0 3px 0 var(--accent); }
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: 0 var(--radius) var(--radius) var(--radius); padding: clamp(1.25rem, 3vw, 2rem); }
.panel-meta { font-size: 0.8rem; color: var(--ink-soft); margin-bottom: 1rem; text-transform: uppercase; letter-spacing: 0.06em; }
.chapters { list-style: none; margin: 0; padding: 0; counter-reset: ch; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 2rem; }
.chapters li {
  counter-increment: ch; display: grid; grid-template-columns: 2.5rem minmax(0, 1fr); column-gap: 0.75rem; row-gap: 0.2rem;
  padding-block: 0.9rem; border-top: 1px solid var(--line);
}
.chapters li::before { content: "Ch " counter(ch); grid-row: span 2; font: 500 0.78rem/1.7 var(--f-mono); color: var(--accent); }
.chapters span { color: var(--ink-soft); font-size: 0.92rem; }
@media (max-width: 760px) { .chapters { grid-template-columns: minmax(0, 1fr); } }

/* Sample quiz */
.quiz-wrap { display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr); gap: clamp(2rem, 5vw, 4rem); align-items: start; }
.quiz-intro { display: flex; flex-direction: column; gap: 1rem; }
.quiz-intro .eyebrow { margin-bottom: -0.25rem; }
.quiz-intro p:not(.eyebrow) { color: var(--ink-soft); }
.quiz { display: flex; flex-direction: column; gap: 1rem; }
.q { margin: 0; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); padding: 1.25rem; display: flex; flex-direction: column; gap: 0.5rem; min-width: 0; }
.q legend { float: left; width: 100%; padding: 0; margin-bottom: 0.5rem; font-weight: 600; line-height: 1.5; }
.q-tag { display: block; font-size: 0.72rem; font-weight: 500; color: var(--accent); letter-spacing: 0.06em; margin-bottom: 0.4rem; }
.q label { display: flex; gap: 0.6rem; align-items: flex-start; padding: 0.6rem 0.75rem; border: 1px solid var(--line); border-radius: 8px; cursor: pointer; transition: border-color .15s, background-color .15s; }
.q label:hover { border-color: var(--accent); }
.q input { margin-top: 0.3rem; accent-color: var(--accent); }
.q label.is-right { border-color: var(--pass); background: var(--pass-bg); }
.q label.is-wrong { border-color: #c0392b; background: color-mix(in srgb, #c0392b 10%, var(--surface)); }
.q.done label { cursor: default; }
.q-explain { font-size: 0.92rem; color: var(--ink-soft); padding: 0.6rem 0.75rem; border-left: 3px solid var(--pass); background: var(--tint); border-radius: 0 6px 6px 0; }
.quiz-score { font-size: 0.85rem; color: var(--ink-soft); }
@media (max-width: 860px) { .quiz-wrap { grid-template-columns: minmax(0, 1fr); } }

/* Planner */
.planner { display: grid; grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr); gap: 1.25rem; margin-top: 2rem; align-items: stretch; }
.planner-controls, .planner-out { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(1.25rem, 3vw, 1.75rem); min-width: 0; }
.planner-controls { display: flex; flex-direction: column; gap: 1.4rem; }
.pc-group { border: 0; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0.5rem; min-width: 0; }
.pc-group legend, .pc-label { font-weight: 600; font-size: 0.9rem; padding: 0; margin-bottom: 0.25rem; display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; }
fieldset.pc-group { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.5rem; }
fieldset.pc-group legend { grid-column: 1 / -1; }
.pc-check { display: grid; grid-template-columns: auto minmax(0, 1fr); column-gap: 0.55rem; align-items: center; padding: 0.65rem 0.75rem; border: 1px solid var(--line); border-radius: 8px; cursor: pointer; }
.pc-check input { grid-row: span 2; accent-color: var(--pass); width: 1.05rem; height: 1.05rem; }
.pc-check span { font: 600 0.85rem/1.2 var(--f-mono); }
.pc-check small { color: var(--ink-soft); font-size: 0.8rem; }
.pc-check:has(input:checked) { border-color: var(--pass); background: var(--pass-bg); }
.pc-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.pc-group output { font-weight: 500; color: var(--accent); }
.pc-group select, .pc-group input[type="month"] { font: 400 1rem/1.4 var(--f-body); color: var(--ink); background: var(--paper); border: 1px solid var(--line); border-radius: 8px; padding: 0.6rem 0.7rem; width: 100%; min-width: 0; }
input[type="range"] { width: 100%; accent-color: var(--accent); }

.planner-out { display: flex; flex-direction: column; gap: 1.25rem; }
.po-summary { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0.75rem; padding-bottom: 1.1rem; border-bottom: 1px dashed var(--line); }
.po-summary div { display: flex; flex-direction: column; gap: 0.2rem; min-width: 0; }
.po-summary span { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-soft); }
.po-summary strong { font: 800 clamp(1.25rem, 1rem + 1vw, 1.7rem)/1.1 var(--f-display); font-variant-numeric: tabular-nums; }
.gantt { display: flex; flex-direction: column; gap: 0.7rem; flex: 1; }
.g-row { display: grid; grid-template-columns: 5.8rem minmax(0, 1fr); gap: 0.75rem; align-items: center; }
.g-code { font: 600 0.8rem/1.2 var(--f-mono); }
.g-track { position: relative; height: 34px; background: var(--tint); border-radius: 6px; }
.g-bar {
  position: absolute; top: 0; bottom: 0; border-radius: 6px; background: var(--accent);
  display: flex; align-items: center; justify-content: flex-end; padding-inline: 0.5rem; min-width: 2.2rem;
  transition: left .35s ease, width .35s ease;
}
.g-bar::after { content: ""; position: absolute; right: -5px; top: 50%; width: 10px; height: 10px; background: var(--pass); border: 2px solid var(--surface); border-radius: 50%; transform: translateY(-50%); }
.g-meta { display: flex; justify-content: space-between; gap: 0.5rem; font-size: 0.78rem; color: var(--ink-soft); grid-column: 2; margin-top: -0.35rem; font-variant-numeric: tabular-nums; }
.g-meta b { color: var(--pass); font-weight: 600; }
.po-empty { color: var(--ink-soft); }
#po-book { align-self: flex-start; }
@media (max-width: 900px) { .planner { grid-template-columns: minmax(0, 1fr); } }
@media (max-width: 420px) { .pc-row, fieldset.pc-group { grid-template-columns: minmax(0, 1fr); } .g-row { grid-template-columns: minmax(0, 1fr); } .g-meta { grid-column: 1; } }
@media (prefers-reduced-motion: reduce) { .g-bar, .run-bar span, .btn { transition: none; } html { scroll-behavior: auto; } }

/* Booking: success state, spam trap, calendar dialog */
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.book-panel { min-width: 0; }
.form-done {
  display: flex; flex-direction: column; gap: 0.9rem; align-items: flex-start;
  background: var(--surface); border: 1px solid var(--pass); border-radius: var(--radius); padding: clamp(1.25rem, 3vw, 2rem);
}
.form-done[hidden] { display: none; }
.form-done p:not(.badge-pass) { color: var(--ink-soft); }
.form-done strong { color: var(--ink); word-break: break-all; }
.cal-dialog {
  width: min(960px, calc(100vw - 32px)); height: min(760px, calc(100vh - 48px));
  padding: 0; border: 1px solid var(--line); border-radius: 14px; background: var(--surface); color: var(--ink);
  overflow: hidden; display: none; flex-direction: column;
}
.cal-dialog[open] { display: flex; }
.cal-dialog::backdrop { background: rgb(7 12 23 / 0.6); backdrop-filter: blur(3px); }
.cal-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 0.8rem 1rem; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.cal-actions { display: flex; align-items: center; gap: 1rem; font-size: 0.9rem; }
.cal-actions button { border: 1px solid var(--line); background: transparent; color: var(--ink); width: 34px; height: 34px; border-radius: 999px; cursor: pointer; font-size: 0.95rem; }
.cal-dialog iframe { flex: 1; width: 100%; border: 0; background: #fff; }

/* Payments */
.pay-note { margin-top: 1.25rem; font-size: 0.9rem; color: var(--ink-soft); padding: 0.75rem 1rem; border: 1px dashed var(--line); border-radius: 8px; max-width: 760px; }
.btn.btn-link { background: none; border-color: transparent; color: var(--accent); padding-inline: 0; font-size: 0.88rem; font-weight: 500; text-decoration: underline; text-underline-offset: 3px; }
.btn.btn-link:hover { transform: none; color: var(--ink); }
.plan-feature .btn.btn-link { color: var(--band-fg); background: none; border-color: transparent; }
.plan-feature .pay-btn { background: var(--marker); border-color: var(--marker); color: #14213d; }

/* Thank-you page */
.ty { min-height: 70vh; display: grid; place-items: center; padding-block: 4rem; }
.ty-card { max-width: 640px; display: flex; flex-direction: column; gap: 1.1rem; align-items: flex-start; }
.ty-card p:not(.badge-pass):not(.eyebrow) { color: var(--ink-soft); }
.ty-steps { margin: 0; padding-left: 1.2rem; color: var(--ink-soft); display: flex; flex-direction: column; gap: 0.4rem; }

/* Group discount banner */
.group-offer {
  margin-top: 1rem; display: flex; align-items: center; gap: 1rem 1.5rem; flex-wrap: wrap;
  padding: 1.1rem 1.4rem; border: 1px dashed var(--pass); border-radius: var(--radius); background: var(--pass-bg);
}
.group-offer .plan-code { margin: 0; }
.group-offer-text { flex: 1 1 320px; min-width: 0; color: var(--ink-soft); }
.group-offer-text strong { color: var(--ink); }