/* practiceinterviewai.com — see DESIGN.md for tokens and rules */
:root {
  --bg: #f4f6f5;
  --surface: #ffffff;
  --surface-2: #eaeeec;
  --ink: #141a18;
  --ink-2: #47524e;
  --ink-3: #6b7672;
  --line: #d8dfdc;
  --accent: #1d6b52;
  --accent-ink: #ffffff;
  --accent-soft: #dcefe7;
  --warn: #9a5b0b;
  --warn-soft: #fbefd9;
  --bad: #a3342a;
  --bad-soft: #f8e1de;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(20, 26, 24, .05), 0 8px 24px -12px rgba(20, 26, 24, .18);
  --font: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-display: ui-serif, "Iowan Old Style", Charter, Georgia, serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --wrap: 1160px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1112;
    --surface: #161b1c;
    --surface-2: #1d2425;
    --ink: #e8eeec;
    --ink-2: #b3bfbb;
    --ink-3: #8a9792;
    --line: #2a3334;
    --accent: #5cc49b;
    --accent-ink: #08201a;
    --accent-soft: #173229;
    --warn: #e7b05a;
    --warn-soft: #33270f;
    --bad: #f08a7f;
    --bad-soft: #3a1c19;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 12px 30px -14px rgba(0, 0, 0, .6);
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { animation: none !important; transition: none !important; } }
body { margin: 0; background: var(--bg); color: var(--ink); font: 17px/1.6 var(--font); -webkit-font-smoothing: antialiased; }
img, svg { max-width: 100%; display: block; }
a { color: var(--accent); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
h1, h2, h3 { line-height: 1.15; letter-spacing: -.015em; margin: 0 0 .5em; text-wrap: balance; }
h1 { font-family: var(--font-display); font-weight: 600; font-size: clamp(2.2rem, 4.6vw, 3.6rem); letter-spacing: -.025em; }
h2 { font-size: clamp(1.45rem, 2.4vw, 1.9rem); font-weight: 650; }
h3 { font-size: 1.15rem; font-weight: 650; }
p { margin: 0 0 1em; }
.wrap { width: min(var(--wrap), 100% - 40px); margin-inline: auto; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: var(--bg); padding: 8px 14px; border-radius: 6px; z-index: 100; }
.skip:focus { left: 12px; }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 46px; padding: 0 20px; border-radius: 999px; font: 600 16px/1 var(--font); text-decoration: none; border: 1px solid transparent; cursor: pointer; transition: transform .15s ease, background .15s ease, border-color .15s ease; white-space: nowrap; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { background: color-mix(in oklab, var(--accent) 88%, var(--ink)); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--ink-3); }
.btn-sm { min-height: 38px; padding: 0 16px; font-size: 15px; }
.btn[disabled] { opacity: .5; cursor: not-allowed; }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }

/* Header */
.site-head { position: sticky; top: 0; z-index: 20; background: color-mix(in oklab, var(--bg) 86%, transparent); backdrop-filter: saturate(1.4) blur(10px); -webkit-backdrop-filter: saturate(1.4) blur(10px); border-bottom: 1px solid var(--line); }
.head-row { display: flex; align-items: center; gap: 28px; min-height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 600; letter-spacing: -.01em; }
.brand b { color: var(--accent); }
.brand-mark { display: grid; place-items: center; width: 30px; height: 30px; border-radius: 9px; background: var(--ink); color: var(--bg); font: 700 16px/1 var(--font-display); }
.head-nav { display: flex; gap: 22px; margin-left: auto; }
.head-nav a { color: var(--ink-2); text-decoration: none; font-size: 15px; font-weight: 500; }
.head-nav a:hover, .head-nav a[aria-current] { color: var(--ink); }
@media (max-width: 720px) {
  .head-nav { display: none; }
  .head-row { justify-content: space-between; gap: 12px; }
}
.brand > span:last-child { white-space: nowrap; }
@media (max-width: 440px) {
  .brand { gap: 8px; }
  .brand > span:last-child { font-size: 15px; }
  .head-row > .btn-sm { padding: 0 12px; font-size: 14px; }
}
@media (max-width: 360px) { .head-row > .btn-sm { display: none; } }

.crumbs { padding: 18px 0 0; font-size: 14px; color: var(--ink-3); }
.crumbs a { color: var(--ink-3); text-decoration: none; }
.crumbs a:hover { color: var(--ink); }

/* Sections */
.section { padding: clamp(56px, 8vw, 104px) 0; }
.eyebrow { display: inline-block; font: 600 13px/1 var(--font); letter-spacing: .08em; text-transform: uppercase; color: var(--accent); margin-bottom: 14px; }
.lede { font-size: clamp(1.08rem, 1.6vw, 1.25rem); color: var(--ink-2); max-width: 60ch; }
.section-head { max-width: 680px; margin-bottom: 40px; }
.section-head p { color: var(--ink-2); }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(28px, 5vw, 72px); align-items: start; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; } }
.muted { color: var(--ink-3); }
.band { background: var(--surface); border-block: 1px solid var(--line); }

/* Home hero */
.hero { padding: clamp(48px, 7vw, 96px) 0 clamp(40px, 6vw, 80px); }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(32px, 5vw, 64px); align-items: center; }
.hero h1 { max-width: 13ch; }
.hero-note { margin-top: 16px; font-size: 14px; color: var(--ink-3); }
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; } }

/* Feedback demo card */
.demo { background: var(--surface); border: 1px solid var(--line); border-radius: 20px; box-shadow: var(--shadow); padding: 22px; }
.demo-q { font-size: 13px; color: var(--ink-3); margin-bottom: 6px; text-transform: uppercase; letter-spacing: .06em; font-weight: 600; }
.demo-question { font-weight: 600; font-size: 1.05rem; margin-bottom: 14px; }
.demo-answer { background: var(--surface-2); border-radius: 12px; padding: 14px 16px; font-size: 15px; color: var(--ink-2); margin-bottom: 16px; }
.demo-answer mark { background: var(--accent-soft); color: var(--ink); border-radius: 4px; padding: 0 3px; }
.meters { display: grid; gap: 10px; }
.meter { display: grid; grid-template-columns: 96px 1fr 34px; align-items: center; gap: 12px; font-size: 14px; }
.meter-bar { height: 8px; border-radius: 99px; background: var(--surface-2); overflow: hidden; }
.meter-bar span { display: block; height: 100%; border-radius: inherit; background: var(--accent); }
.meter-bar span.mid { background: var(--warn); }
.meter b { text-align: right; font-variant-numeric: tabular-nums; }
.demo-tip { margin-top: 16px; padding-top: 14px; border-top: 1px dashed var(--line); font-size: 14px; color: var(--ink-2); }
.demo-tip strong { color: var(--ink); }

/* Track grid */
.tracks { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
@media (max-width: 900px) { .tracks { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .tracks { grid-template-columns: 1fr; } }
.track { display: flex; flex-direction: column; gap: 6px; padding: 22px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); text-decoration: none; color: var(--ink); transition: border-color .15s, transform .15s; }
.track:hover { border-color: var(--accent); transform: translateY(-2px); }
.track h3 { margin: 0; }
.track p { margin: 0; color: var(--ink-2); font-size: 15px; }
.track .track-go { margin-top: auto; padding-top: 10px; color: var(--accent); font-weight: 600; font-size: 15px; }

/* Steps */
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; counter-reset: step; }
.steps li { counter-increment: step; position: relative; padding-top: 52px; }
.steps li::before { content: counter(step, decimal-leading-zero); position: absolute; top: 0; left: 0; font: 600 14px/1 var(--mono); color: var(--accent); padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); }
.steps h3 { margin-bottom: 6px; }
.steps p { color: var(--ink-2); margin: 0; }
@media (max-width: 760px) { .steps { grid-template-columns: 1fr; } }
.prose .steps { grid-template-columns: 1fr; gap: 18px; margin: 1.2em 0 1.6em; }
.prose .steps li { padding: 0 0 0 56px; min-height: 36px; }

/* Feature list */
.features { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--line); }
.features > div { padding: 26px 26px 26px 0; border-bottom: 1px solid var(--line); }
.features > div:nth-child(odd) { border-right: 1px solid var(--line); }
.features > div:nth-child(even) { padding-left: 26px; }
.features p { color: var(--ink-2); margin: 0; }
@media (max-width: 760px) { .features { grid-template-columns: 1fr; } .features > div { padding: 22px 0 !important; border-right: 0 !important; } }

/* CTA band */
.cta-band { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 28px 30px; margin: 40px 0; border-radius: 18px; background: var(--ink); color: var(--bg); }
.cta-band p { margin: 0; color: color-mix(in oklab, var(--bg) 78%, var(--ink)); }
.cta-band .cta-band-title { color: var(--bg); font-weight: 650; font-size: 1.2rem; margin-bottom: 4px; }
.cta-band .btn-primary { background: var(--bg); color: var(--ink); }
main > .cta-band { width: min(var(--wrap), 100% - 40px); margin: 0 auto 72px; }
@media (max-width: 640px) { .cta-band { flex-direction: column; align-items: flex-start; padding: 24px; } }

/* Article pages */
.page-hero { padding: 36px 0 24px; }
.page-hero h1 { max-width: 20ch; }
.meta-line { font-size: 14px; color: var(--ink-3); margin: 0; }
.prose-grid { display: grid; grid-template-columns: 230px minmax(0, 1fr); gap: 56px; padding-bottom: 80px; align-items: start; }
@media (max-width: 960px) { .prose-grid { grid-template-columns: 1fr; gap: 8px; } }
.toc { position: sticky; top: 88px; font-size: 14px; }
.toc-title { font-weight: 600; margin-bottom: 8px; color: var(--ink); }
.toc ol { list-style: none; margin: 0; padding: 0 0 0 12px; border-left: 2px solid var(--line); }
.toc li { margin: 0 0 8px; }
.toc a { color: var(--ink-2); text-decoration: none; }
.toc a:hover { color: var(--accent); }
@media (max-width: 960px) { .toc { position: static; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; margin-bottom: 24px; } }
.prose { max-width: 720px; min-width: 0; }
.prose h2 { margin-top: 2.2em; scroll-margin-top: 84px; }
.prose h3 { margin-top: 1.6em; }
.prose > h2:first-child { margin-top: 0; }
.prose ul, .prose ol:not(.qlist):not(.steps) { padding-left: 1.3em; }
.prose li { margin-bottom: .4em; }
.note { background: var(--accent-soft); border-radius: var(--radius); padding: 18px 20px; margin: 1.4em 0; }
.note p:last-child { margin: 0; }
.example { border-left: 3px solid var(--accent); background: var(--surface); border-radius: 0 var(--radius) var(--radius) 0; padding: 18px 22px; margin: 1.4em 0; }
.example p:last-child { margin-bottom: 0; }
.example-label { font: 600 13px/1 var(--font); letter-spacing: .06em; text-transform: uppercase; color: var(--accent); margin-bottom: 10px !important; }
.checklist { list-style: none; padding-left: 0 !important; }
.checklist li { position: relative; padding-left: 30px; }
.checklist li::before { content: ""; position: absolute; left: 2px; top: .45em; width: 14px; height: 8px; border-left: 2px solid var(--accent); border-bottom: 2px solid var(--accent); transform: rotate(-45deg); }
.table-wrap { overflow-x: auto; margin: 1.4em 0; border: 1px solid var(--line); border-radius: var(--radius); }
table { border-collapse: collapse; width: 100%; font-size: 15px; background: var(--surface); }
th, td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { background: var(--surface-2); font-weight: 600; }
tr:last-child td { border-bottom: 0; }

/* Question list */
.qlist { list-style: none; padding: 0; margin: 1.2em 0 1.8em; counter-reset: q; border-top: 1px solid var(--line); }
.qlist li { counter-increment: q; display: flex; gap: 16px; align-items: flex-start; padding: 16px 0; border-bottom: 1px solid var(--line); margin: 0; }
.qlist li::before { content: counter(q); flex: 0 0 28px; font: 600 14px/1.7 var(--mono); color: var(--ink-3); }
.qbody { flex: 1; min-width: 0; }
.qtext { font-weight: 600; margin: 0; }
.qtip { margin: 4px 0 0; color: var(--ink-2); font-size: 15px; }
.qpractice { flex: none; font-size: 14px; font-weight: 600; text-decoration: none; padding: 6px 12px; border: 1px solid var(--line); border-radius: 99px; color: var(--ink); }
.qpractice:hover { border-color: var(--accent); color: var(--accent); }
@media (max-width: 560px) { .qlist li { flex-wrap: wrap; } .qpractice { margin-left: 44px; } }

/* FAQ */
.faq { margin-top: 3em; }
.faq details { border-bottom: 1px solid var(--line); }
.faq details:first-of-type { border-top: 1px solid var(--line); }
.faq summary { cursor: pointer; list-style: none; padding: 18px 36px 18px 0; font-weight: 600; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 4px; top: 14px; font: 400 24px/1 var(--font); color: var(--ink-3); transition: transform .2s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq-a { padding: 0 0 18px; color: var(--ink-2); }
.faq-a p { margin: 0; }
main > .faq { width: min(760px, 100% - 40px); margin: 0 auto 80px; }

/* BOF pages */
.bof-hero { display: grid; grid-template-columns: 1.1fr .9fr; gap: clamp(28px, 5vw, 64px); align-items: center; padding: clamp(32px, 5vw, 72px) 0 clamp(40px, 6vw, 80px); }
.bof-hero h1 { max-width: 16ch; }
@media (max-width: 900px) { .bof-hero { grid-template-columns: 1fr; } }
.bof-panel { background: var(--surface); border: 1px solid var(--line); border-radius: 20px; padding: 8px 22px 4px; box-shadow: var(--shadow); min-width: 0; }
.bof-panel .qlist { border-top: 0; margin: 0; }
.bof-panel .qlist li:last-child { border-bottom: 0; }
.bof-panel-title { font-size: 13px; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; color: var(--ink-3); margin: 14px 0 0; }
.wrap.section > .prose { margin-inline: 0; }

/* Hub cards */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; margin: 0 0 24px; padding: 0; list-style: none; }
.cards li { margin: 0; }
.cards a { display: block; height: 100%; padding: 20px 22px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); text-decoration: none; color: var(--ink); transition: border-color .15s; }
.cards a:hover { border-color: var(--accent); }
.cards strong { display: block; margin-bottom: 4px; }
.cards span { color: var(--ink-2); font-size: 15px; }

/* Footer */
.site-foot { border-top: 1px solid var(--line); padding: 56px 0 28px; font-size: 15px; background: var(--surface); }
.foot-grid { display: grid; grid-template-columns: 1.4fr repeat(4, 1fr); gap: 32px; }
.foot-brand p { color: var(--ink-3); margin-top: 12px; max-width: 30ch; }
.foot-title { font-weight: 600; margin-bottom: 10px; }
.site-foot ul { list-style: none; padding: 0; margin: 0; }
.site-foot li { margin-bottom: 8px; }
.site-foot li a { color: var(--ink-2); text-decoration: none; }
.site-foot li a:hover { color: var(--ink); }
.foot-base { margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--ink-3); font-size: 14px; }
.foot-base p { margin: 0; }
@media (max-width: 900px) { .foot-grid { grid-template-columns: 1fr 1fr; } .foot-brand { grid-column: 1 / -1; } }

/* Reveal on scroll (site.js adds .in) */
.js .reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.js .reveal.in { opacity: 1; transform: none; }

/* ---------- Practice tool (/start/) ---------- */
.tool { padding: 28px 0 80px; }
.tool-head { margin-bottom: 20px; }
.tool-head h1 { font-size: clamp(1.8rem, 3.4vw, 2.6rem); margin: 0; }
.tool-head p { margin: 6px 0 0; color: var(--ink-2); }
.track-pick { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.chip { min-height: 38px; padding: 0 14px; border-radius: 99px; border: 1px solid var(--line); background: var(--surface); color: var(--ink-2); font: 500 15px/1 var(--font); cursor: pointer; }
.chip:hover { border-color: var(--ink-3); color: var(--ink); }
.chip[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: var(--bg); }
.tool-grid { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: 20px; align-items: start; }
@media (max-width: 920px) { .tool-grid { grid-template-columns: 1fr; } }
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: 18px; padding: 22px; min-width: 0; }
.q-meta { display: flex; justify-content: space-between; align-items: center; gap: 12px; font-size: 14px; color: var(--ink-3); margin-bottom: 10px; }
.q-current { font-family: var(--font-display); font-size: clamp(1.35rem, 2.4vw, 1.75rem); line-height: 1.25; font-weight: 600; margin: 0 0 8px; }
.q-hint { color: var(--ink-2); font-size: 15px; margin: 0 0 16px; }
.answer { width: 100%; min-height: 220px; resize: vertical; padding: 14px 16px; border-radius: 12px; border: 1px solid var(--line); background: var(--bg); color: var(--ink); font: 16px/1.55 var(--font); }
.answer:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.tool-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 12px; }
.tool-bar .spacer { flex: 1; }
.tool-bar { gap: 8px; }
.tool-bar .btn-sm { padding: 0 14px; }
.timer { font: 600 15px/1 var(--mono); font-variant-numeric: tabular-nums; padding: 10px 12px; border-radius: 10px; background: var(--surface-2); }
.timer.over { background: var(--warn-soft); color: var(--warn); }
.mic.live { background: var(--bad); color: #fff; border-color: var(--bad); }
.mic.live::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: #fff; animation: pulse 1s infinite; }
@keyframes pulse { 50% { opacity: .2; } }
.wordcount { font-size: 14px; color: var(--ink-3); }
.status { font-size: 14px; color: var(--ink-3); min-height: 1.4em; margin: 10px 0 0; }
.fb-empty { color: var(--ink-2); }
.fb-empty h2 { font-size: 1.1rem; color: var(--ink); }
.fb-empty ul { padding-left: 1.2em; margin: 0; }
.fb-empty li { margin-bottom: 6px; }
.score { display: flex; align-items: baseline; gap: 10px; margin-bottom: 12px; }
.score b { font: 600 3rem/1 var(--font-display); }
.score span { color: var(--ink-3); }
.fb-list { list-style: none; padding: 0; margin: 16px 0 0; display: grid; gap: 10px; }
.fb-list li { padding: 12px 14px; border-radius: 12px; font-size: 15px; background: var(--surface-2); }
.fb-list li.good { background: var(--accent-soft); }
.fb-list li.warn { background: var(--warn-soft); }
.fb-list li.bad { background: var(--bad-soft); }
.fb-list strong { display: block; margin-bottom: 2px; }
.ai-critique { margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--line); font-size: 15px; }
.ai-critique h3 { font-size: 1rem; margin-bottom: 8px; }
.ai-critique p, .ai-critique li { color: var(--ink-2); }
.history { margin-top: 20px; }
.history h2 { font-size: 1.05rem; }
.history ol { padding-left: 1.2em; margin: 0; font-size: 15px; color: var(--ink-2); }
.history li { margin-bottom: 6px; }
.privacy-note { font-size: 13px; color: var(--ink-3); margin-top: 14px; }