:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --surface-alt: #eef3ff;
  --text: #101828;
  --muted: #475467;
  --line: #dbe4f0;
  --primary: #2249d8;
  --primary-dark: #1736a6;
  --accent: #ea5b2a;
  --success: #12715b;
  --danger: #b42318;
  --shadow: 0 20px 45px rgba(16, 24, 40, 0.08);
  --radius: 20px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin:0; font-family:'Inter',system-ui,sans-serif; color:var(--text); background:linear-gradient(180deg,#f9fbff 0%,#f3f6fb 100%); }
a { color:inherit; text-decoration:none; }
button { font:inherit; }
img { max-width:100%; display:block; }
.container { width:min(1180px, calc(100% - 2rem)); margin:0 auto; }
.section { padding:5rem 0; }
.section-alt { background:#f0f4fb; }
.page-main { min-height: calc(100vh - 160px); }
.eyebrow { margin:0 0 .75rem; text-transform:uppercase; letter-spacing:.12em; font-size:.78rem; font-weight:700; color:var(--primary); }
.lead, .body-copy { color:var(--muted); line-height:1.8; }
.page-title { margin:.2rem 0 1rem; font-size:clamp(2rem, 4vw, 4rem); letter-spacing:-.04em; }
.site-header { position:sticky; top:0; z-index:50; backdrop-filter:blur(14px); background:rgba(255,255,255,.84); border-bottom:1px solid rgba(219,228,240,.9); }
.nav-wrap, .footer-wrap { display:flex; align-items:center; justify-content:space-between; gap:1rem; padding:1rem 0; }
.brand { display:flex; align-items:center; gap:.9rem; }
.brand-mark { width:46px; height:46px; border-radius:14px; display:grid; place-items:center; font-weight:800; color:#fff; background:linear-gradient(135deg,var(--primary),#6d8cff); box-shadow:var(--shadow); }
.brand-name { font-weight:800; }
.brand-tag { color:var(--muted); font-size:.92rem; }
.nav { display:flex; gap:1.15rem; color:var(--muted); }
.nav a.active, .nav a:hover { color:var(--primary); }
.hero { padding:5rem 0 4rem; }
.hero-grid, .practice-layout, .tutor-profile-grid, .dashboard-grid, .feature-grid, .pricing-grid, .steps-grid { display:grid; gap:1.5rem; }
.hero-grid-wide { grid-template-columns:1.15fr .85fr; align-items:center; }
.hero h1 { margin:0 0 1rem; font-size:clamp(2.5rem, 5vw, 5rem); line-height:1.02; letter-spacing:-.05em; }
.hero-copy { max-width:63ch; color:var(--muted); font-size:1.08rem; line-height:1.75; }
.hero-actions { display:flex; gap:.9rem; margin:1.4rem 0 2rem; flex-wrap:wrap; }
.btn { border:0; border-radius:999px; padding:.95rem 1.3rem; cursor:pointer; font-weight:700; transition:transform .16s ease, background .16s ease, color .16s ease; }
.btn:hover { transform:translateY(-1px); }
.btn-small { padding:.72rem 1rem; }
.btn-primary { background:var(--primary); color:#fff; }
.btn-primary:hover { background:var(--primary-dark); }
.btn-secondary { background:#fff; color:var(--text); border:1px solid var(--line); }
.hero-stats { display:grid; grid-template-columns:repeat(3,1fr); gap:1rem; }
.stat-card, .panel, .feature-card, .test-card, .module-card-large, .testimonial-card, .step-card, .pricing-card, .module-tile { background:var(--surface); border:1px solid rgba(219,228,240,.9); border-radius:var(--radius); box-shadow:var(--shadow); }
.stat-card { padding:1rem; }
.stat-card strong { display:block; font-size:1.4rem; margin-bottom:.35rem; }
.stat-card span { color:var(--muted); font-size:.92rem; }
.panel { padding:1.4rem; }
.hero-side-stack { display:grid; gap:1rem; }
.top-score-card { background:linear-gradient(135deg,#1736a6,#4368ff); color:white; }
.score-label { opacity:.85; font-size:.9rem; }
.score-value { font-size:clamp(2rem, 5vw, 3rem); font-weight:800; margin:.4rem 0; }
.tutor-mini { display:flex; align-items:center; gap:1rem; margin-bottom:1rem; }
.tutor-mini img { width:84px; height:84px; object-fit:cover; border-radius:18px; }
.mini-list { margin:0; padding-left:1.15rem; color:var(--muted); line-height:1.8; }
.section-heading { max-width:760px; margin-bottom:2rem; }
.compact-heading { margin-bottom:1.5rem; }
.section-heading h2 { margin:0; font-size:clamp(1.8rem, 3vw, 3rem); letter-spacing:-.03em; }
.feature-grid { grid-template-columns:repeat(3,1fr); }
.feature-grid-2 { grid-template-columns:repeat(2,1fr); }
.feature-card, .module-card-large, .testimonial-card, .step-card, .pricing-card { padding:1.5rem; }
.feature-card p, .module-card-large p, .testimonial-card p, .step-card p, .pricing-card p { color:var(--muted); line-height:1.75; }
.split-callout { display:grid; grid-template-columns:.8fr 1.2fr; gap:1.5rem; align-items:start; }
.steps-grid { grid-template-columns:repeat(2,1fr); }
.step-card span { display:inline-grid; place-items:center; width:44px; height:44px; border-radius:999px; background:var(--surface-alt); color:var(--primary); font-weight:800; margin-bottom:.9rem; }
.cta-banner { display:flex; align-items:center; justify-content:space-between; gap:1rem; background:#fff; border:1px solid var(--line); padding:2rem; border-radius:24px; box-shadow:var(--shadow); }
.module-selector { display:grid; grid-template-columns:repeat(5,1fr); gap:1rem; }
.module-tile { padding:1rem; text-align:left; cursor:pointer; }
.module-tile strong { display:block; margin-bottom:.3rem; }
.module-tile span { color:var(--muted); font-size:.9rem; }
.module-tile.active { border-color:var(--primary); box-shadow:0 0 0 3px rgba(34,73,216,.12); }
.practice-layout { grid-template-columns:.82fr 1.18fr; align-items:start; }
.practice-sidebar h2 { margin-top:0; font-size:clamp(1.7rem, 3vw, 2.5rem); }
.practice-sidebar p, .practice-sidebar li { color:var(--muted); line-height:1.7; }
.check-list { padding-left:1.2rem; }
.timer-box { margin-top:1.2rem; background:white; border:1px solid var(--line); border-radius:18px; padding:1rem 1.1rem; }
.timer-box span { display:block; color:var(--muted); font-size:.9rem; }
.timer-box strong { font-size:2rem; }
.compact-panel { margin-top:1rem; }
.metric-row { display:flex; justify-content:space-between; margin:.6rem 0; }
.test-card { padding:1.5rem; }
.test-card-header, .question-meta, .test-nav { display:flex; align-items:center; justify-content:space-between; gap:1rem; }
.question-meta { justify-content:flex-start; margin:1rem 0 1.25rem; flex-wrap:wrap; }
.mini-label { color:var(--muted); font-size:.9rem; }
.question-prompt { background:#fbfcff; border:1px solid var(--line); border-radius:18px; padding:1.2rem; line-height:1.75; margin-bottom:1.1rem; }
.choices { display:grid; gap:.8rem; }
.choice { display:grid; grid-template-columns:auto 1fr; gap:.8rem; align-items:start; padding:1rem; border:1px solid var(--line); background:white; border-radius:16px; cursor:pointer; }
.choice.selected { border-color:var(--primary); box-shadow:0 0 0 3px rgba(34,73,216,.12); }
.choice.correct { border-color:rgba(18,113,91,.5); background:rgba(18,113,91,.08); }
.choice.incorrect { border-color:rgba(180,35,24,.5); background:rgba(180,35,24,.08); }
.choice-letter, .pill { display:inline-flex; align-items:center; justify-content:center; border-radius:999px; }
.choice-letter { width:30px; height:30px; background:#eef2ff; color:var(--primary); font-weight:700; }
.pill { padding:.55rem .85rem; background:var(--surface-alt); color:var(--primary); font-weight:600; font-size:.9rem; }
.pill-muted { background:#f2f4f7; color:var(--muted); }
.test-nav { margin-top:1.2rem; }
.feedback-box { margin-top:1rem; padding:1rem; border-radius:16px; background:#f8fafc; border:1px solid var(--line); color:var(--muted); line-height:1.7; }
.hidden { display:none; }
.dashboard-grid { grid-template-columns:.8fr 1fr 1fr; }
.result-summary { background:linear-gradient(180deg,#0f172a,#1e293b); color:white; }
.result-score { font-size:clamp(2.4rem, 4vw, 4rem); font-weight:800; margin:.35rem 0; }
.breakdown-rows { display:grid; gap:.9rem; }
.breakdown-row { display:grid; gap:.45rem; }
.breakdown-head { display:flex; justify-content:space-between; gap:1rem; font-weight:600; }
.progress { height:10px; border-radius:999px; background:#eaecf0; overflow:hidden; }
.progress > span { display:block; height:100%; background:linear-gradient(90deg,var(--primary),#7b93ff); }
.recommendations-list { margin:0; padding-left:1.2rem; color:var(--muted); line-height:1.8; }
.tutor-profile-grid { grid-template-columns:.72fr 1.28fr; align-items:center; }
.tutor-photo-panel { padding:0; overflow:hidden; }
.tutor-photo-large { width:100%; height:100%; object-fit:cover; min-height:520px; }
.pricing-grid { grid-template-columns:repeat(2,1fr); }
.pricing-card { position:relative; overflow:hidden; }
.pricing-card-dark { background:linear-gradient(135deg,#0f172a,#111827); color:white; }
.pricing-card-dark p { color:rgba(255,255,255,.78); }
.pricing-badge { font-weight:700; color:var(--primary); text-transform:uppercase; letter-spacing:.09em; font-size:.8rem; }
.pricing-card-dark .pricing-badge { color:#a5b4fc; }
.pricing-value { font-size:4.5rem; font-weight:800; line-height:1; margin:.75rem 0 1rem; }
.testimonial-card strong { display:block; margin-top:1rem; }
.testimonial-card span { color:var(--muted); font-size:.95rem; }
.site-footer { border-top:1px solid var(--line); background:white; color:var(--muted); }

@media (max-width: 1100px) {
  .hero-grid-wide, .practice-layout, .dashboard-grid, .tutor-profile-grid, .feature-grid, .feature-grid-2, .steps-grid, .pricing-grid, .split-callout, .module-selector { grid-template-columns:1fr; }
  .hero-stats { grid-template-columns:1fr; }
}
@media (max-width: 720px) {
  .nav { display:none; }
  .nav-wrap, .footer-wrap, .test-card-header, .test-nav, .cta-banner { flex-direction:column; align-items:flex-start; }
}