:root{--ink:#171717;--muted:#666;--line:#e5e5e5;--soft:#f7f7f8;--brand:#5624d0;--brand2:#401b9c;--white:#fff;--radius:10px;--shadow:0 10px 30px rgba(0,0,0,.07)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:#fff;font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;line-height:1.55}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto}.td-container{width:min(1180px,calc(100% - 40px));margin:auto}.td-header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 2px 8px rgba(0,0,0,.035)}.td-header__inner{height:72px;display:flex;align-items:center;gap:22px}.td-brand{display:flex;align-items:center;gap:9px;font-weight:800;font-size:21px;white-space:nowrap}.td-brand .custom-logo{max-height:42px;width:auto}.td-brand__mark{display:grid;place-items:center;width:34px;height:34px;border-radius:8px;background:var(--brand);color:#fff}.td-nav ul{display:flex;list-style:none;gap:18px;padding:0;margin:0;font-size:14px}.td-nav a:hover,.td-link:hover{color:var(--brand)}.td-search{height:42px;flex:1;display:flex;align-items:center;gap:8px;border:1px solid #aaa;border-radius:999px;padding:0 15px;background:#fafafa}.td-search input{width:100%;border:0;outline:0;background:transparent;font-size:14px}.td-account{display:flex;align-items:center;gap:12px}.td-menu-toggle{display:none;border:0;background:none;font-size:24px}.td-mobile-menu{padding:15px 0}.td-mobile-menu ul{list-style:none;padding:0}.td-mobile-menu li{padding:8px 0}.td-btn{display:inline-flex;justify-content:center;align-items:center;min-height:42px;padding:10px 18px;border-radius:5px;font-weight:700;border:1px solid transparent;cursor:pointer}.td-btn--primary{background:var(--brand);color:#fff}.td-btn--primary:hover{background:var(--brand2)}.td-btn--dark{background:var(--ink);color:#fff}.td-btn--light{background:#fff;color:#111}.td-btn--ghost,.td-btn--outline{border-color:#222;background:#fff}.td-hero{padding:64px 0;background:linear-gradient(115deg,#f5f1ff 0%,#fff 55%,#f4fbff 100%)}.td-hero__grid{display:grid;grid-template-columns:1.35fr .65fr;gap:60px;align-items:center}.td-eyebrow,.td-kicker{font-size:12px;text-transform:uppercase;letter-spacing:.13em;font-weight:800;color:var(--brand)}.td-hero h1{font-size:clamp(40px,5vw,64px);line-height:1.02;letter-spacing:-.045em;margin:14px 0 20px;max-width:800px}.td-hero p{font-size:19px;color:#4e4e4e;max-width:700px}.td-hero-search{display:flex;max-width:650px;margin-top:28px}.td-hero-search input{flex:1;min-width:0;padding:15px 17px;border:1px solid #777;border-right:0;border-radius:5px 0 0 5px;font-size:16px}.td-hero-search .td-btn{border-radius:0 5px 5px 0}.td-quick-links{display:flex;flex-wrap:wrap;gap:12px;margin-top:15px;font-size:13px}.td-quick-links a{text-decoration:underline;font-weight:700}.td-hero-card{background:#fff;padding:14px 26px;border:1px solid var(--line);box-shadow:var(--shadow)}.td-stat{padding:18px 0;border-bottom:1px solid var(--line);display:flex;flex-direction:column}.td-stat:last-child{border:0}.td-stat span{color:var(--muted);font-size:14px;margin-top:3px}.td-section{padding:72px 0}.td-section--soft{background:var(--soft)}.td-section--dark{background:#1d1d1f;color:#fff}.td-section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:28px}.td-section h2{font-size:32px;line-height:1.15;letter-spacing:-.025em;margin:7px 0}.td-section-head>a{font-weight:700;color:var(--brand)}.td-category-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}.td-category-card{border:1px solid var(--line);padding:24px;min-height:155px;display:flex;flex-direction:column;transition:.2s;background:#fff}.td-category-card:hover{transform:translateY(-2px);box-shadow:var(--shadow)}.td-category-icon{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:#eee7ff;color:var(--brand);font-weight:900;margin-bottom:18px}.td-category-card strong{font-size:18px}.td-category-card small{color:var(--muted);margin-top:5px}.td-card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.td-exam-card{background:#fff;border:1px solid var(--line);display:flex;flex-direction:column}.td-exam-card__media{height:140px;background:linear-gradient(135deg,#2b195c,#704bd3);display:flex;align-items:flex-end;padding:18px;color:#fff;font-weight:800;font-size:18px}.td-exam-card__body{padding:20px}.td-badge{display:inline-block;font-size:11px;font-weight:800;background:#ece6ff;color:#3f1a9b;padding:4px 8px;border-radius:3px;text-transform:uppercase}.td-exam-card h3{font-size:19px;line-height:1.3;margin:12px 0 6px}.td-instructor{font-size:13px;color:var(--muted)}.td-meta{display:flex;flex-wrap:wrap;gap:8px 14px;font-size:12px;color:#555;padding:12px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.td-card-footer{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:16px;font-size:13px}.td-split{display:grid;grid-template-columns:1fr 460px;gap:70px;align-items:center}.td-split p{color:var(--muted);font-size:17px;max-width:650px}.td-practice-panel{border:1px solid var(--line);padding:28px;box-shadow:var(--shadow);display:grid;gap:16px}.td-practice-panel label{display:grid;gap:6px;font-size:13px;font-weight:700}.td-practice-panel select{width:100%;padding:12px;border:1px solid #aaa;background:#fff}.td-inline{display:grid;grid-template-columns:1fr 1fr;gap:12px}.td-cta{display:flex;justify-content:space-between;align-items:center;gap:40px}.td-cta p{color:#cfcfcf;max-width:720px}.td-footer{background:#111;color:#fff;padding:55px 0 25px}.td-footer__grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:50px}.td-footer h3{font-size:14px}.td-footer a{display:block;color:#ddd;margin:8px 0;font-size:14px}.td-footer p{color:#aaa;max-width:420px}.td-footer__bottom{border-top:1px solid #333;margin-top:40px;padding-top:20px;color:#999;font-size:13px}.td-content{max-width:850px}.td-post{padding:25px 0;border-bottom:1px solid var(--line)}.td-post h1{font-size:28px}
@media(max-width:980px){.td-nav{display:none}.td-menu-toggle{display:block;margin-left:auto}.td-search{order:4;position:absolute;left:20px;right:20px;top:82px;display:none}.td-header__inner{gap:14px}.td-hero__grid,.td-split{grid-template-columns:1fr}.td-category-grid{grid-template-columns:repeat(2,1fr)}.td-card-grid{grid-template-columns:1fr 1fr}.td-account .td-link{display:none}}
@media(max-width:680px){.td-container{width:min(100% - 28px,1180px)}.td-header__inner{height:64px}.td-account .td-btn--dark{display:none}.td-hero{padding:45px 0}.td-hero__grid{gap:28px}.td-hero h1{font-size:39px}.td-hero p{font-size:16px}.td-hero-search{display:grid;grid-template-columns:1fr}.td-hero-search input,.td-hero-search .td-btn{border:1px solid #777;border-radius:4px}.td-hero-search .td-btn{margin-top:8px;border-color:var(--brand)}.td-section{padding:50px 0}.td-section-head{align-items:flex-start;flex-direction:column}.td-category-grid,.td-card-grid{grid-template-columns:1fr}.td-split{gap:35px}.td-practice-panel{padding:20px}.td-cta{align-items:flex-start;flex-direction:column}.td-footer__grid{grid-template-columns:1fr}.td-card-footer{align-items:flex-start;flex-direction:column}}
/* v0.5.0 refinements */
.td-hero h1{font-size:clamp(34px,4.2vw,52px);line-height:1.5;letter-spacing:-.035em}.td-content h1,.td-post h1{line-height:1.5}.td-btn,.td-btn:visited{color:#fff}.td-btn--primary,.td-btn--primary:visited{background:var(--brand);color:#fff}.td-btn--dark,.td-btn--dark:visited{background:var(--ink);color:#fff}.td-btn--light,.td-btn--light:visited{background:#fff;color:#111;border-color:#fff}.td-btn--ghost,.td-btn--outline,.td-btn--ghost:visited,.td-btn--outline:visited{border-color:#222;background:#fff;color:#111}.td-btn--ghost:hover,.td-btn--outline:hover{background:#f4f4f4;color:#111}.td-section--dark .td-kicker{color:#d8ccff}.td-section--dark .td-btn--light{background:#fff;color:#111}.td-section--dark .td-btn--light:hover{background:#f0f0f0;color:#111}.td-logout-link{font-weight:700;color:#8d1d1d}.td-logout-link:hover{color:#6e1010}
@media(max-width:680px){.td-hero h1{font-size:34px;line-height:1.5}.td-logout-link{display:none}}

/* v0.7.0 — Exam Engine form refinements */
.td-form-panel{max-width:980px}.td-form-panel>h2{margin-bottom:8px}.td-form-panel>p{max-width:820px}.td-check-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:8px}.td-check-grid .td-check{margin:0;padding:11px 12px;border:1px solid var(--line);border-radius:8px;background:#fff;align-items:center}.td-check-grid .td-check:hover{border-color:#b7a5ed;background:#faf8ff}.td-check-grid .td-check input{accent-color:var(--brand);width:18px;height:18px;flex:0 0 auto}.td-form-panel .td-field>label>small{font-weight:500;color:var(--muted);margin-left:4px}.td-form-panel .td-help,.td-form-panel .td-field small{line-height:1.65}.td-alert--error{background:#fff4f4!important;border:1px solid #e7b8b8!important;color:#8e1a1a!important}.td-btn[disabled],button.td-btn:disabled,input.td-btn:disabled{background:#d5d5d8!important;border-color:#d5d5d8!important;color:#777!important;cursor:not-allowed!important;box-shadow:none!important;opacity:1!important}.td-btn[disabled]:hover,button.td-btn:disabled:hover{background:#d5d5d8!important;color:#777!important;transform:none!important}.td-form-panel select:disabled,.td-form-panel input:disabled,.td-form-panel textarea:disabled{background:#f5f5f6;color:#777;cursor:not-allowed}.td-form-panel code{display:inline-block;max-width:100%;overflow-wrap:anywhere;padding:2px 6px;border-radius:4px;background:#f4f4f6;color:#333;font-size:.9em}.td-owner-note{display:flex;align-items:flex-start;gap:10px;padding:12px 14px;border:1px solid #ded7f6;background:#faf8ff;border-radius:8px;color:#4a3d6b}.td-taxonomy-note{margin-top:8px;font-size:13px;color:var(--muted)}
@media(max-width:680px){.td-check-grid{grid-template-columns:1fr}.td-form-panel .td-form-row{grid-template-columns:1fr}}

/* v0.9.0 account/mobile refinements */
.td-profile-cta,.td-profile-cta:visited{background:#fff!important;color:var(--brand)!important;border-color:var(--brand)!important}.td-profile-cta:hover{background:#f5f1ff!important;color:var(--brand2)!important}.td-mobile-accountbar{display:none}.td-profile-image{width:100%;height:100%;object-fit:cover;border-radius:50%}body{padding-bottom:0}
@media(max-width:680px){.td-account{display:none}.td-mobile-menu{padding-bottom:86px}.td-mobile-accountbar{position:fixed;left:0;right:0;bottom:0;z-index:80;display:grid;grid-template-columns:1fr 1fr;gap:10px;padding:10px 14px calc(10px + env(safe-area-inset-bottom));background:#fff;border-top:1px solid var(--line);box-shadow:0 -6px 20px rgba(0,0,0,.08)}.td-mobile-accountbar .td-btn{width:100%}.td-mobile-accountbar .td-mobile-dashboard{grid-column:1/-1}.td-footer{padding-bottom:95px}}