:root {
  --ink: #edf3ff;
  --muted: #9eabc4;
  --soft: #697792;
  --line: rgba(157, 174, 209, .18);
  --panel: rgba(17, 28, 51, .78);
  --panel-2: #101c34;
  --canvas: #070d1b;
  --canvas-2: #0b1223;
  --cyan: #35d6e9;
  --cyan-deep: #13899e;
  --violet: #8d7dff;
  --lime: #c8ef7b;
  --danger: #ff7b84;
  --warning: #f2c871;
  --radius: 20px;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: "Cairo", system-ui, sans-serif;
  line-height: 1.6;
}
button, input { font: inherit; }
button { cursor: pointer; }
.app-shell { min-height: 100vh; overflow: hidden; background: radial-gradient(circle at 90% 3%, rgba(50, 113, 161, .14), transparent 28rem), var(--canvas); }
.topbar { height: 78px; padding: 0 clamp(22px, 5vw, 80px); display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid rgba(255,255,255,.07); background: rgba(7, 13, 27, .72); backdrop-filter: blur(18px); position: sticky; top: 0; z-index: 20; }
.brand { color: var(--ink); text-decoration: none; display: flex; align-items: center; gap: 12px; direction: ltr; }
.brand strong { display: block; font: 700 18px "Space Grotesk", sans-serif; letter-spacing: -.04em; }
.brand small { display: block; margin-top: -4px; color: var(--soft); font-size: 9px; letter-spacing: .14em; text-transform: uppercase; }
.brand-mark { width: 30px; height: 30px; display: flex; align-items: flex-end; gap: 3px; padding: 5px; border: 1px solid rgba(53,214,233,.5); border-radius: 9px; background: rgba(53,214,233,.08); transform: skew(-8deg); }
.brand-mark span { display: block; width: 5px; border-radius: 4px; background: var(--cyan); }
.brand-mark span:nth-child(1) { height: 8px; opacity: .5; }.brand-mark span:nth-child(2) { height: 14px; opacity: .76; }.brand-mark span:nth-child(3) { height: 20px; }
.topbar-actions { display: flex; align-items: center; gap: 14px; }
.status-pill { color: #b5f5cb; border: 1px solid rgba(112,225,153,.22); border-radius: 99px; background: rgba(112,225,153,.08); font-size: 11px; padding: 6px 11px; }
.status-dot { display: inline-block; width: 6px; height: 6px; border-radius: 50%; margin-left: 7px; background: #75e89f; box-shadow: 0 0 10px #75e89f; }
.ghost-button, .outline-button { color: var(--muted); border: 1px solid var(--line); border-radius: 9px; padding: 7px 13px; background: transparent; font-size: 12px; transition: .2s ease; }
.ghost-button:hover, .outline-button:hover { color: var(--ink); border-color: rgba(53,214,233,.65); background: rgba(53,214,233,.08); }
main { max-width: 1440px; margin: 0 auto; padding: 0 clamp(22px, 5vw, 80px) 80px; }
.hero-section { min-height: 450px; display: grid; grid-template-columns: minmax(0, 1fr) minmax(370px, .85fr); align-items: center; gap: 8vw; position: relative; }
.hero-copy { padding: 74px 0 58px; max-width: 670px; }
.eyebrow, .section-kicker, .submit-kicker { color: var(--cyan); font: 700 10px "Space Grotesk", sans-serif; letter-spacing: .16em; direction: ltr; text-transform: uppercase; }
.eyebrow-line { width: 30px; height: 1px; background: var(--cyan); display: inline-block; vertical-align: middle; margin-left: 9px; }
.hero-copy h1 { margin: 20px 0 18px; font-size: clamp(40px, 5.5vw, 78px); line-height: .99; letter-spacing: -.07em; font-weight: 800; }
.hero-copy h1 em { color: var(--cyan); font-style: normal; text-shadow: 0 0 28px rgba(53,214,233,.22); }
.hero-text { max-width: 580px; color: var(--muted); font-size: 15px; line-height: 2; }
.hero-text strong { color: var(--ink); }
.hero-meta { display: flex; gap: 35px; margin-top: 36px; direction: rtl; }
.hero-meta div { border-right: 1px solid var(--line); padding-right: 19px; }.hero-meta div:first-child { border-right: 0; padding-right: 0; }
.hero-meta strong { display: block; color: var(--ink); font: 700 24px "Space Grotesk", sans-serif; }.hero-meta span { color: var(--soft); font-size: 11px; }
.hero-visual { min-height: 340px; position: relative; display: grid; place-items: center; isolation: isolate; }
.grid-lines { position: absolute; inset: 3% -12% 0; z-index: -2; opacity: .5; background-image: linear-gradient(rgba(53,214,233,.08) 1px, transparent 1px), linear-gradient(90deg, rgba(53,214,233,.08) 1px, transparent 1px); background-size: 38px 38px; mask-image: radial-gradient(ellipse at center, #000 8%, transparent 72%); }
.orb { position: absolute; border-radius: 50%; filter: blur(1px); opacity: .55; z-index: -1; }.orb-one { width: 290px; height: 290px; border: 1px solid rgba(53,214,233,.3); box-shadow: 0 0 80px rgba(53,214,233,.08), inset 0 0 70px rgba(53,214,233,.06); }.orb-two { width: 160px; height: 160px; border: 1px dashed rgba(141,125,255,.55); transform: translate(80px, -68px); }
.signal-card { border: 1px solid rgba(165,185,219,.2); background: linear-gradient(135deg, rgba(30, 48, 80, .84), rgba(12, 21, 42, .88)); box-shadow: 0 24px 70px rgba(0,0,0,.32); border-radius: 16px; backdrop-filter: blur(12px); }
.signal-card-main { width: 240px; padding: 23px; transform: rotate(-5deg); }.signal-card-side { position: absolute; padding: 14px 17px; display: flex; align-items: center; gap: 10px; color: var(--muted); font: 600 11px "Space Grotesk", sans-serif; line-height: 1.2; transform: translate(135px, 102px) rotate(8deg); }.signal-icon { color: var(--lime); font-size: 28px; line-height: 1; }
.signal-label { color: var(--soft); font: 10px "Space Grotesk", sans-serif; letter-spacing: .1em; }.signal-value { margin: 9px 0 16px; display: flex; align-items: center; justify-content: space-between; direction: ltr; }.signal-value > span:first-child { font: 700 46px "Space Grotesk", sans-serif; letter-spacing: -.08em; }.signal-check { color: var(--lime); font-size: 22px; }.mini-progress, .progress-track { height: 6px; overflow: hidden; border-radius: 99px; background: rgba(255,255,255,.09); direction: ltr; }.mini-progress span, .progress-track span { display: block; width: 0%; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--cyan-deep), var(--cyan)); transition: width .35s ease; }.signal-card-main small { display: block; color: var(--soft); margin-top: 10px; direction: ltr; font: 10px "Space Grotesk", sans-serif; }
.quiz-layout { display: grid; grid-template-columns: 265px minmax(0, 1fr); gap: clamp(24px, 4vw, 65px); align-items: start; direction: ltr; }.progress-rail, .quiz-column { direction: rtl; }
.rail-card { padding: 20px; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(15, 27, 50, .62); }.sticky-card { position: sticky; top: 96px; }.rail-heading { display: flex; align-items: center; justify-content: space-between; color: var(--muted); font-size: 13px; }.rail-heading strong { direction: ltr; color: var(--cyan); font: 700 16px "Space Grotesk", sans-serif; }.progress-track { margin: 15px 0 9px; }.progress-rail p { color: var(--soft); margin: 0; font-size: 11px; }.legend { display: grid; gap: 8px; padding: 18px 0; margin: 16px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); color: var(--muted); font-size: 11px; }.legend div { display: flex; align-items: center; gap: 8px; }.legend strong { margin-right: auto; color: var(--ink); font: 600 11px "Space Grotesk", sans-serif; }.legend-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--soft); }.legend-dot.answered { background: var(--cyan); box-shadow: 0 0 8px rgba(53,214,233,.45); }.legend-dot.unanswered { border: 1px solid var(--soft); background: transparent; }
.primary-button { border: 0; border-radius: 10px; padding: 13px 18px; color: #04121d; background: var(--cyan); font-weight: 800; font-size: 12px; box-shadow: 0 9px 25px rgba(53,214,233,.15); transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }.primary-button:hover { background: #6be5f1; box-shadow: 0 12px 30px rgba(53,214,233,.25); transform: translateY(-2px); }.primary-button span { margin-right: 8px; font-size: 16px; }.full-width { width: 100%; }
.jump-card { margin-top: 15px; }.jump-title { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 14px; }.jump-title span { color: var(--ink); font-size: 13px; font-weight: 700; }.jump-title small { color: var(--soft); font-size: 10px; }.question-nav { display: grid; grid-template-columns: repeat(5, 1fr); gap: 5px; max-height: 250px; overflow: auto; padding-left: 2px; }.question-nav button { aspect-ratio: 1; padding: 0; color: var(--soft); border: 1px solid rgba(157,174,209,.14); border-radius: 6px; background: rgba(255,255,255,.025); font: 10px "Space Grotesk", sans-serif; transition: .2s ease; }.question-nav button:hover { color: var(--cyan); border-color: var(--cyan); }.question-nav button.answered { color: var(--canvas); background: var(--cyan); border-color: var(--cyan); }.question-nav button.active { outline: 2px solid var(--violet); outline-offset: 1px; }.question-nav button.wrong { color: #fff; background: rgba(255,123,132,.4); border-color: var(--danger); }
.section-intro { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 22px; }.section-intro h2, .submit-panel h2, .results-header h2 { margin: 7px 0 0; color: var(--ink); font-size: 24px; line-height: 1.35; letter-spacing: -.04em; }.deck-note { color: var(--soft); font-size: 11px; border-bottom: 1px solid var(--line); padding-bottom: 5px; white-space: nowrap; }.question-stack { display: grid; gap: 13px; }.question-card { scroll-margin-top: 96px; padding: 23px 25px 25px; border: 1px solid var(--line); border-radius: var(--radius); background: linear-gradient(120deg, rgba(17,29,53,.87), rgba(11,20,38,.72)); transition: border .2s ease, box-shadow .2s ease, transform .2s ease; }.question-card:hover { border-color: rgba(53,214,233,.3); }.question-card.is-current { border-color: rgba(141,125,255,.7); box-shadow: 0 0 0 3px rgba(141,125,255,.08); }.question-card.is-wrong { border-color: rgba(255,123,132,.6); }.question-card.is-correct { border-color: rgba(200,239,123,.55); }.question-topline { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }.q-number { color: var(--cyan); font: 700 11px "Space Grotesk", sans-serif; direction: ltr; }.q-status { color: var(--soft); font-size: 10px; }.q-status.filled { color: var(--lime); }.question-text { margin: 0 0 18px; color: #f4f7ff; font-family: "Space Grotesk", "Cairo", sans-serif; font-size: 16px; line-height: 1.65; direction: ltr; text-align: left; }.options { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 9px; direction: ltr; }.option-label { display: flex; align-items: flex-start; gap: 10px; min-height: 49px; padding: 12px 13px; border: 1px solid rgba(157,174,209,.15); border-radius: 10px; background: rgba(255,255,255,.025); cursor: pointer; color: #c9d3e8; font-family: "Space Grotesk", "Cairo", sans-serif; font-size: 12px; line-height: 1.45; transition: .18s ease; }.option-label:hover { border-color: rgba(53,214,233,.56); color: #fff; background: rgba(53,214,233,.07); }.option-label input { position: absolute; opacity: 0; pointer-events: none; }.option-key { flex: 0 0 22px; width: 22px; height: 22px; display: grid; place-items: center; margin-top: 1px; color: var(--soft); border: 1px solid rgba(157,174,209,.25); border-radius: 6px; font: 700 10px "Space Grotesk", sans-serif; text-transform: uppercase; }.option-label:has(input:checked) { color: #eaffff; border-color: var(--cyan); background: rgba(53,214,233,.12); box-shadow: inset 3px 0 0 var(--cyan); }.option-label:has(input:checked) .option-key { color: #051923; background: var(--cyan); border-color: var(--cyan); }.question-card.reviewed .option-label.correct-answer { border-color: rgba(200,239,123,.7); background: rgba(200,239,123,.09); }.question-card.reviewed .option-label.correct-answer .option-key { color: #101a0b; background: var(--lime); border-color: var(--lime); }.question-card.reviewed .option-label.selected-wrong { color: #ffd7db; border-color: rgba(255,123,132,.7); background: rgba(255,123,132,.1); }.question-card.reviewed .option-label.selected-wrong .option-key { color: #fff; background: var(--danger); border-color: var(--danger); }
.reveal-answer-btn { display: flex; align-items: center; justify-content: center; gap: 9px; width: 100%; margin-top: 17px; padding: 12px 16px; color: var(--ink); border: 1px solid rgba(53,214,233,.5); border-radius: 10px; background: linear-gradient(90deg, rgba(53,214,233,.11), rgba(141,125,255,.1)); font-size: 12px; font-weight: 800; transition: .2s ease; }.reveal-answer-btn:hover { color: #fff; border-color: var(--cyan); background: linear-gradient(90deg, rgba(53,214,233,.22), rgba(141,125,255,.18)); box-shadow: 0 8px 22px rgba(53,214,233,.12); }.reveal-answer-icon { color: var(--cyan); font: 700 18px/1 "Space Grotesk", sans-serif; }.reveal-answer-icon.is-open { color: var(--lime); }.correct-answer-panel { display: flex; align-items: center; flex-wrap: wrap; gap: 9px; margin-top: 10px; padding: 12px 14px; border: 1px solid rgba(200,239,123,.35); border-radius: 9px; background: rgba(200,239,123,.08); direction: rtl; }.correct-answer-label { color: var(--lime); font-size: 11px; font-weight: 700; }.correct-answer-key { display: inline-grid; place-items: center; width: 22px; height: 22px; color: #101a0b; border-radius: 6px; background: var(--lime); font: 700 11px "Space Grotesk", sans-serif; text-transform: uppercase; }.correct-answer-text { color: #e9f7cf; font-family: "Space Grotesk", "Cairo", sans-serif; font-size: 12px; direction: ltr; }
.submit-panel { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-top: 30px; padding: 26px 28px; border: 1px solid rgba(53,214,233,.25); border-radius: var(--radius); background: radial-gradient(circle at 80% 10%, rgba(53,214,233,.13), transparent 35%), rgba(16,35,55,.82); }.submit-panel h2 { font-size: 22px; }.submit-panel p { color: var(--muted); margin: 7px 0 0; font-size: 12px; }
.results-section { margin-top: 50px; padding-top: 30px; border-top: 1px solid var(--line); }.results-header { display: flex; justify-content: space-between; align-items: end; margin-bottom: 22px; }.score-grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 10px; }.score-hero, .score-stat { min-height: 126px; padding: 20px; border: 1px solid var(--line); border-radius: 15px; background: var(--panel); }.score-hero { display: flex; flex-direction: column; justify-content: center; background: linear-gradient(135deg, rgba(26,68,83,.92), rgba(16,35,55,.8)); }.score-label, .score-stat span:last-child { color: var(--muted); font-size: 11px; }.score-hero strong { color: var(--cyan); font: 700 40px "Space Grotesk", sans-serif; line-height: 1.2; direction: ltr; }.score-hero > span:last-child { color: var(--lime); font-size: 11px; }.score-stat { display: flex; flex-direction: column; gap: 3px; }.score-stat strong { font: 700 32px "Space Grotesk", sans-serif; direction: ltr; }.stat-icon { width: 24px; height: 24px; display: grid; place-items: center; border-radius: 7px; font: 700 16px "Space Grotesk", sans-serif; }.stat-icon.correct { color: var(--lime); background: rgba(200,239,123,.11); }.stat-icon.wrong { color: var(--danger); background: rgba(255,123,132,.11); }.stat-icon.blank { color: var(--warning); background: rgba(242,200,113,.11); }.review-summary { margin-top: 16px; padding: 14px 17px; border-radius: 11px; background: rgba(255,255,255,.035); color: var(--muted); font-size: 12px; }.mistakes-list { display: grid; gap: 10px; margin-top: 13px; }.mistake-item { padding: 17px 19px; border: 1px solid rgba(255,123,132,.22); border-right: 3px solid var(--danger); border-radius: 13px; background: rgba(255,123,132,.055); }.mistake-top { display: flex; align-items: center; justify-content: space-between; gap: 14px; }.mistake-number { color: var(--danger); font: 700 11px "Space Grotesk", sans-serif; direction: ltr; }.mistake-question { margin: 7px 0 12px; color: #f4f7ff; font: 14px/1.6 "Space Grotesk", "Cairo", sans-serif; direction: ltr; text-align: left; }.answer-review { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }.answer-chip { padding: 8px 10px; border-radius: 8px; font-size: 11px; }.answer-chip strong { display: block; margin-bottom: 3px; font-size: 10px; }.answer-chip.user { color: #ffc2c7; background: rgba(255,123,132,.1); }.answer-chip.correct { color: #dbf6ad; background: rgba(200,239,123,.1); }.answer-chip.blank { color: #f8d995; background: rgba(242,200,113,.1); }
.loading-card { min-height: 120px; display: grid; place-items: center; color: var(--muted); border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); font-size: 13px; }.loader { width: 17px; height: 17px; display: inline-block; margin-left: 8px; vertical-align: middle; border: 2px solid rgba(53,214,233,.22); border-top-color: var(--cyan); border-radius: 50%; animation: spin .8s linear infinite; }@keyframes spin { to { transform: rotate(360deg); } }
.footer { max-width: 1440px; margin: 0 auto; padding: 22px clamp(22px, 5vw, 80px) 35px; display: flex; justify-content: space-between; color: var(--soft); border-top: 1px solid var(--line); font: 10px "Space Grotesk", sans-serif; direction: ltr; letter-spacing: .04em; }
[hidden] { display: none !important; }
@media (max-width: 980px) { .hero-section { grid-template-columns: 1fr; min-height: auto; }.hero-copy { padding-bottom: 20px; }.hero-visual { min-height: 285px; margin-bottom: 30px; }.quiz-layout { grid-template-columns: 1fr; }.progress-rail { display: grid; grid-template-columns: 1fr 1.5fr; gap: 12px; }.sticky-card { position: static; }.jump-card { margin-top: 0; }.question-nav { max-height: 120px; }.score-grid { grid-template-columns: repeat(3, 1fr); }.score-hero { grid-column: 1 / -1; } }
@media (max-width: 620px) { .topbar { height: 68px; padding: 0 18px; }.status-pill { display: none; }.hero-copy { padding-top: 50px; }.hero-copy h1 { font-size: 45px; }.hero-text { font-size: 13px; }.hero-meta { gap: 16px; }.hero-meta div { padding-right: 11px; }.hero-meta strong { font-size: 19px; }.hero-meta span { font-size: 9px; }.hero-visual { transform: scale(.9); margin: -8px 0 4px; }.progress-rail { grid-template-columns: 1fr; }.jump-card { display: none; }.section-intro { display: block; }.deck-note { display: inline-block; margin-top: 12px; }.section-intro h2 { font-size: 20px; }.question-card { padding: 17px 15px; }.question-text { font-size: 14px; }.options { grid-template-columns: 1fr; }.option-label { font-size: 11px; }.submit-panel { display: block; padding: 21px; }.submit-panel .primary-button { margin-top: 18px; width: 100%; }.results-header { display: block; }.results-header .outline-button { margin-top: 14px; }.score-grid { grid-template-columns: repeat(2,1fr); }.score-hero { grid-column: 1 / -1; }.answer-review { grid-template-columns: 1fr; }.footer { display: block; line-height: 2; } }