:root {
    --tdch-navy: #082f66;
    --tdch-navy-dark: #041f46;
    --tdch-teal: #006d77;
    --tdch-teal-light: #e8f6f6;
    --tdch-gold: #e5a000;
    --tdch-ink: #172133;
    --tdch-muted: #607086;
    --tdch-line: #dce5ec;
    --tdch-bg: #f6f9fb;
}

.tdch-home { color: var(--tdch-ink); font-family: inherit; overflow: hidden; }
.tdch-home *, .tdch-home *::before, .tdch-home *::after { box-sizing: border-box; }
.tdch-shell { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
.tdch-hero { background: linear-gradient(135deg, var(--tdch-navy-dark) 0%, var(--tdch-navy) 56%, var(--tdch-teal) 100%); color: #fff; padding: 76px 0; position: relative; }
.tdch-hero::after { content: ""; position: absolute; inset: 0; background: radial-gradient(circle at 82% 15%, rgba(229,160,0,.22), transparent 28%); pointer-events: none; }
.tdch-hero-grid { display: grid; grid-template-columns: 1.3fr .8fr; gap: 70px; align-items: center; position: relative; z-index: 1; }
.tdch-eyebrow, .tdch-kicker { color: var(--tdch-gold); font-size: .78rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.tdch-hero h1 { color: #fff; font-size: clamp(2.5rem, 5vw, 4.6rem); line-height: 1.03; letter-spacing: -.045em; margin: 14px 0 18px; max-width: 740px; }
.tdch-hero-copy > p { color: rgba(255,255,255,.84); font-size: 1.15rem; line-height: 1.7; max-width: 690px; margin: 0 0 26px; }
.tdch-search { display: flex; background: #fff; border-radius: 12px; padding: 6px; max-width: 650px; box-shadow: 0 18px 50px rgba(0,0,0,.2); }
.tdch-search input[type="search"] { flex: 1; border: 0; box-shadow: none; min-width: 0; padding: 13px 15px; color: var(--tdch-ink); background: transparent; }
.tdch-search button { border: 0; border-radius: 8px; background: var(--tdch-gold); color: #172133; font-weight: 800; padding: 0 24px; cursor: pointer; }
.tdch-actions { display: flex; gap: 12px; margin-top: 22px; flex-wrap: wrap; }
.tdch-button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 11px 22px; border-radius: 9px; font-weight: 800; text-decoration: none !important; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.tdch-button:hover { transform: translateY(-2px); }
.tdch-button--primary { background: var(--tdch-gold); color: #172133 !important; }
.tdch-button--ghost { color: #fff !important; border: 1px solid rgba(255,255,255,.45); background: rgba(255,255,255,.08); }
.tdch-button--light { background: #fff; color: var(--tdch-navy) !important; }
.tdch-hero-panel { display: grid; gap: 13px; }
.tdch-feature { display: grid; grid-template-columns: 54px 1fr; gap: 14px; align-items: center; padding: 17px; border: 1px solid rgba(255,255,255,.15); background: rgba(255,255,255,.09); backdrop-filter: blur(8px); border-radius: 14px; }
.tdch-feature > span { width: 54px; height: 54px; display: grid; place-items: center; background: rgba(255,255,255,.12); border-radius: 12px; color: var(--tdch-gold); }
.tdch-feature svg { width: 30px; fill: currentColor; }
.tdch-feature strong, .tdch-feature small { display: block; }
.tdch-feature strong { color: #fff; font-size: 1rem; }
.tdch-feature small { color: rgba(255,255,255,.72); margin-top: 3px; line-height: 1.45; }
.tdch-section { padding: 72px 0; }
.tdch-section--categories, .tdch-section--steps { background: var(--tdch-bg); }
.tdch-section-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 30px; }
.tdch-section-heading--center { justify-content: center; text-align: center; }
.tdch-section-heading h2 { color: var(--tdch-ink); font-size: clamp(1.8rem, 3vw, 2.65rem); letter-spacing: -.035em; margin: 7px 0 0; }
.tdch-section-heading > a { color: var(--tdch-teal); font-weight: 800; text-decoration: none; }
.tdch-categories { display: flex; flex-wrap: wrap; gap: 12px; }
.tdch-category { display: inline-flex; padding: 12px 17px; border-radius: 999px; border: 1px solid var(--tdch-line); background: #fff; color: var(--tdch-navy); text-decoration: none !important; font-weight: 700; box-shadow: 0 5px 18px rgba(8,47,102,.05); }
.tdch-category:hover { border-color: var(--tdch-teal); color: var(--tdch-teal); }
.tdch-category--disabled { opacity: .9; }
.tdch-course-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.tdch-course-card { border: 1px solid var(--tdch-line); border-radius: 15px; overflow: hidden; background: #fff; box-shadow: 0 10px 30px rgba(8,47,102,.07); transition: transform .2s ease, box-shadow .2s ease; }
.tdch-course-card:hover { transform: translateY(-5px); box-shadow: 0 18px 38px rgba(8,47,102,.13); }
.tdch-course-image { display: block; height: 190px; background: linear-gradient(135deg, var(--tdch-teal-light), #eef4fb); }
.tdch-course-image img { width: 100%; height: 100%; object-fit: cover; }
.tdch-course-image > span { display: grid; place-items: center; height: 100%; color: var(--tdch-teal); }
.tdch-course-image svg { width: 56px; fill: currentColor; opacity: .8; }
.tdch-course-body { padding: 20px; }
.tdch-course-meta { display: flex; align-items: center; justify-content: space-between; gap: 12px; color: var(--tdch-muted); font-size: .78rem; font-weight: 700; }
.tdch-badge { border-radius: 999px; padding: 5px 9px; font-size: .7rem; white-space: nowrap; }
.tdch-badge--free { background: #e9f8ef; color: #167348; }
.tdch-badge--paid { background: #fff3d7; color: #875900; }
.tdch-course-card h3 { font-size: 1.15rem; line-height: 1.35; margin: 14px 0 18px; }
.tdch-course-card h3 a { color: var(--tdch-ink); text-decoration: none; }
.tdch-course-link { color: var(--tdch-teal); font-weight: 800; text-decoration: none !important; }
.tdch-empty { display: flex; flex-direction: column; align-items: center; text-align: center; padding: 52px 24px; border: 1px dashed #b9c9d6; border-radius: 16px; background: var(--tdch-bg); }
.tdch-empty strong { font-size: 1.25rem; color: var(--tdch-navy); }
.tdch-empty span { color: var(--tdch-muted); margin-top: 8px; }
.tdch-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.tdch-steps > div { padding: 30px; background: #fff; border: 1px solid var(--tdch-line); border-radius: 15px; }
.tdch-steps > div > span { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 50%; background: var(--tdch-teal-light); color: var(--tdch-teal); font-weight: 900; }
.tdch-steps h3 { margin: 20px 0 8px; color: var(--tdch-navy); }
.tdch-steps p { color: var(--tdch-muted); line-height: 1.65; margin: 0; }
.tdch-section--institution { padding-top: 0; }
.tdch-institution-card { display: flex; align-items: center; justify-content: space-between; gap: 35px; border-radius: 20px; padding: 42px 48px; color: #fff; background: linear-gradient(120deg, var(--tdch-teal), var(--tdch-navy)); }
.tdch-institution-card h2 { color: #fff; margin: 8px 0; font-size: clamp(1.65rem, 3vw, 2.4rem); }
.tdch-institution-card p { margin: 0; color: rgba(255,255,255,.8); }

@media (max-width: 900px) {
    .tdch-hero-grid { grid-template-columns: 1fr; gap: 38px; }
    .tdch-course-grid, .tdch-steps { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
    .tdch-shell { width: min(100% - 28px, 1180px); }
    .tdch-hero { padding: 55px 0; }
    .tdch-search { display: grid; }
    .tdch-search button { min-height: 46px; }
    .tdch-course-grid, .tdch-steps { grid-template-columns: 1fr; }
    .tdch-section { padding: 52px 0; }
    .tdch-section-heading { align-items: flex-start; flex-direction: column; }
    .tdch-institution-card { align-items: flex-start; flex-direction: column; padding: 32px 25px; }
}