/**
 * Khóa học đấu thầu — hub / money page.
 * Scoped under .vdt-dth-page so no other template is affected.
 * All component classes use the vdt-dth- prefix. Reuses global tokens
 * (--vdt-navy, --vdt-blue, --vdt-cyan, --vdt-gold, --vdt-bg) and the
 * shared SVG sprite + .vdt-btn / .vdt-form components.
 */

.vdt-dth-page {
  --dth-navy: var(--vdt-navy);
  --dth-blue: var(--vdt-blue);
  --dth-cyan: var(--vdt-cyan);
  --dth-gold: var(--vdt-gold);
  --dth-ink: #172033;
  --dth-muted: #667085;
  --dth-line: #e4e7ec;
  --dth-soft: var(--vdt-bg);
  --dth-radius: 24px;
  --dth-shadow: 0 18px 48px rgba(11, 31, 58, .10);
  --dth-shadow-lg: 0 26px 64px rgba(11, 31, 58, .16);
  background: var(--vdt-white);
}

/* Shared icon rendering for sprite <use> inside this page. */
.vdt-dth-page .vdt-dth-ic svg,
.vdt-dth-page .vdt-dth-inline-ic {
  width: 26px;
  height: 26px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ---------- Section scaffolding ---------- */
.vdt-dth-section { padding: clamp(46px, 6.4vw, 84px) 0; }
.vdt-dth-section--soft { background: var(--dth-soft); }

.vdt-dth-head {
  max-width: 780px;
  margin: 0 auto clamp(26px, 3.6vw, 44px);
  text-align: center;
}
.vdt-dth-head--left { margin-left: 0; text-align: left; }
.vdt-dth-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(30, 91, 255, .08);
  color: var(--dth-blue);
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .02em;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.vdt-dth-head h2 {
  font-size: clamp(1.62rem, 2.5vw, 2.3rem);
  line-height: 1.22;
  margin: 0 0 12px;
}
.vdt-dth-head p {
  color: var(--dth-muted);
  font-size: clamp(1rem, 1.1vw, 1.08rem);
  margin: 0;
}

/* ---------- Breadcrumb ---------- */
.vdt-dth-breadcrumb { padding: 18px 0 0; }
.vdt-dth-breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: .88rem;
}
.vdt-dth-breadcrumb li { display: inline-flex; align-items: center; gap: 10px; color: rgba(255, 255, 255, .72); }
.vdt-dth-breadcrumb li:not(:last-child)::after { content: "/"; color: rgba(255, 255, 255, .4); }
.vdt-dth-breadcrumb a { color: rgba(255, 255, 255, .8); text-decoration: none; }
.vdt-dth-breadcrumb a:hover { color: #fff; }
.vdt-dth-breadcrumb [aria-current="page"] { color: var(--dth-gold); font-weight: 600; }

/* ---------- Hero ---------- */
.vdt-dth-hero {
  position: relative;
  overflow: hidden;
  color: #fff;
  background:
    radial-gradient(1100px 520px at 82% -8%, rgba(0, 184, 217, .28), transparent 60%),
    radial-gradient(760px 460px at 6% 108%, rgba(30, 91, 255, .34), transparent 58%),
    linear-gradient(135deg, #0b1f3a 0%, #0e2b52 52%, #07182d 100%);
  background-size: 160% 160%, 160% 160%, 100% 100%;
  animation: vdt-dth-flow 22s ease-in-out infinite;
}
@keyframes vdt-dth-flow {
  0%, 100% { background-position: 0% 0%, 0% 100%, 0 0; }
  50% { background-position: 30% 20%, 20% 80%, 0 0; }
}
.vdt-dth-hero__grid {
  display: grid;
  grid-template-columns: 1.08fr .92fr;
  gap: clamp(28px, 4vw, 60px);
  align-items: center;
  padding: clamp(30px, 4.4vw, 56px) 0 clamp(48px, 6vw, 82px);
}
.vdt-dth-hero__content { max-width: 620px; }
.vdt-dth-page .vdt-dth-hero h1 {
  color: #fff;
  font-size: clamp(1.92rem, 3.5vw, 3rem);
  line-height: 1.16;
  letter-spacing: -.01em;
  margin: 16px 0 0;
}
.vdt-dth-page .vdt-dth-hero h1 b { color: var(--dth-gold); font-weight: 800; }
.vdt-dth-hero__lead {
  color: rgba(255, 255, 255, .9);
  font-size: clamp(1.02rem, 1.25vw, 1.16rem);
  line-height: 1.68;
  margin: 18px 0 0;
}
.vdt-dth-hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 0;
}
.vdt-dth-hero__chips span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 13px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .09);
  border: 1px solid rgba(255, 255, 255, .16);
  font-size: .84rem;
  font-weight: 600;
  color: rgba(255, 255, 255, .94);
}
.vdt-dth-hero__chips .vdt-dth-inline-ic { width: 16px; height: 16px; color: var(--dth-cyan); }
.vdt-dth-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 26px 0 0;
}
.vdt-dth-hero__actions .vdt-btn { min-height: 52px; }
.vdt-btn--gold { color: #12233f; background: linear-gradient(135deg, #ffd166, var(--vdt-gold)); box-shadow: 0 14px 34px rgba(245, 184, 66, .32); border-color: transparent; }
.vdt-btn--gold:hover { box-shadow: 0 20px 46px rgba(245, 184, 66, .42); }
.vdt-dth-hero__actions .vdt-btn--secondary { color: #fff; background: rgba(255, 255, 255, .08); border-color: rgba(255, 255, 255, .3); backdrop-filter: blur(8px); }
.vdt-dth-hero__hotline {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 22px 0 0;
  font-size: .98rem;
  color: rgba(255, 255, 255, .86);
}
.vdt-dth-hero__hotline a { color: #fff; font-weight: 700; text-decoration: none; }
.vdt-dth-hero__hotline .vdt-dth-inline-ic { width: 19px; height: 19px; color: var(--dth-gold); }

.vdt-dth-hero__media { position: relative; }
.vdt-dth-hero__frame {
  position: relative;
  border-radius: 26px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .16);
  box-shadow: 0 30px 70px rgba(0, 0, 0, .4);
  aspect-ratio: 4 / 3;
  background: rgba(255, 255, 255, .04);
}
.vdt-dth-hero__frame img { width: 100%; height: 100%; object-fit: cover; display: block; }
.vdt-dth-hero__badge {
  position: absolute;
  left: 18px;
  bottom: 18px;
  right: 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-radius: 16px;
  background: rgba(9, 22, 42, .82);
  border: 1px solid rgba(255, 255, 255, .14);
  backdrop-filter: blur(10px);
}
.vdt-dth-hero__badge .vdt-dth-ic {
  flex: 0 0 auto;
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  color: #12233f;
  background: linear-gradient(135deg, #ffd166, var(--dth-gold));
}
.vdt-dth-hero__badge strong { display: block; font-size: .96rem; color: #fff; }
.vdt-dth-hero__badge span { font-size: .82rem; color: rgba(255, 255, 255, .74); line-height: 1.45; }

/* ---------- Quick info bar ---------- */
.vdt-dth-quick { margin-top: clamp(-40px, -4vw, -56px); position: relative; z-index: 3; padding-bottom: clamp(40px, 5vw, 64px); }
.vdt-dth-quick__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.vdt-dth-quick-card {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 20px;
  border-radius: 18px;
  background: #fff;
  border: 1px solid var(--dth-line);
  box-shadow: var(--dth-shadow);
  transition: transform .25s ease, box-shadow .25s ease;
}
.vdt-dth-quick-card:hover { transform: translateY(-4px); box-shadow: var(--dth-shadow-lg); }
.vdt-dth-quick-card .vdt-dth-ic {
  flex: 0 0 auto;
  display: inline-grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 13px;
  color: #fff;
  background: linear-gradient(135deg, var(--dth-blue), var(--dth-cyan));
}
.vdt-dth-quick-card:nth-child(2) .vdt-dth-ic { background: linear-gradient(135deg, #1e5bff, #6b8bff); }
.vdt-dth-quick-card:nth-child(3) .vdt-dth-ic { background: linear-gradient(135deg, #f5b842, #f7a83a); color: #12233f; }
.vdt-dth-quick-card:nth-child(4) .vdt-dth-ic { background: linear-gradient(135deg, #00b8d9, #12b76a); }
.vdt-dth-quick-card strong { display: block; font-size: 1rem; color: var(--dth-navy); margin-bottom: 3px; }
.vdt-dth-quick-card span { font-size: .88rem; color: var(--dth-muted); line-height: 1.5; }

/* ---------- Decision block ---------- */
.vdt-dth-decision__table {
  border-radius: var(--dth-radius);
  overflow: hidden;
  border: 1px solid var(--dth-line);
  box-shadow: var(--dth-shadow);
  background: #fff;
}
.vdt-dth-decision__head,
.vdt-dth-dc-row {
  display: grid;
  grid-template-columns: 1.5fr 1.15fr auto;
  align-items: center;
  gap: 18px;
  padding: 18px 22px;
}
.vdt-dth-decision__head {
  background: var(--dth-navy);
  color: #fff;
  font-weight: 700;
  font-size: .82rem;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.vdt-dth-dc-row { border-top: 1px solid var(--dth-line); }
.vdt-dth-dc-row:nth-child(even) { background: #fafcff; }
.vdt-dth-dc-profile { display: flex; align-items: flex-start; gap: 13px; }
.vdt-dth-dc-profile .vdt-dth-ic {
  flex: 0 0 auto;
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 11px;
  color: var(--dth-blue);
  background: rgba(30, 91, 255, .09);
}
.vdt-dth-dc-profile p { margin: 0; font-size: .96rem; color: var(--dth-ink); line-height: 1.5; }
.vdt-dth-dc-pick { display: inline-flex; }
.vdt-dth-dc-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(0, 184, 217, .1);
  color: #0f7893;
  font-weight: 700;
  font-size: .9rem;
  line-height: 1.3;
}
.vdt-dth-dc-badge .vdt-dth-inline-ic { width: 17px; height: 17px; }
.vdt-dth-dc-act { justify-self: end; }
.vdt-dth-dc-act a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--dth-blue);
  font-weight: 700;
  font-size: .92rem;
  text-decoration: none;
  white-space: nowrap;
}
.vdt-dth-dc-act a .vdt-dth-inline-ic { width: 16px; height: 16px; transition: transform .2s ease; }
.vdt-dth-dc-act a:hover .vdt-dth-inline-ic { transform: translateX(3px); }
.vdt-dth-dc-label { display: none; font-size: .74rem; font-weight: 700; text-transform: uppercase; letter-spacing: .03em; color: var(--dth-muted); margin-bottom: 6px; }

/* ---------- Course cards ---------- */
.vdt-dth-course-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  align-items: stretch;
}
.vdt-dth-ccard {
  display: flex;
  flex-direction: column;
  padding: 28px;
  border-radius: var(--dth-radius);
  background: #fff;
  border: 1px solid var(--dth-line);
  box-shadow: var(--dth-shadow);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.vdt-dth-ccard:hover { transform: translateY(-6px); box-shadow: var(--dth-shadow-lg); border-color: rgba(30, 91, 255, .3); }
.vdt-dth-ccard--featured {
  border-color: transparent;
  background:
    linear-gradient(#fff, #fff) padding-box,
    linear-gradient(135deg, var(--dth-blue), var(--dth-cyan)) border-box;
  border: 2px solid transparent;
  box-shadow: 0 28px 66px rgba(30, 91, 255, .2);
}
.vdt-dth-ccard__top { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; }
.vdt-dth-ccard__ic {
  display: inline-grid;
  place-items: center;
  width: 54px;
  height: 54px;
  border-radius: 15px;
  color: #fff;
  background: linear-gradient(135deg, var(--dth-navy), #16345f);
}
.vdt-dth-ccard--featured .vdt-dth-ccard__ic { background: linear-gradient(135deg, var(--dth-blue), var(--dth-cyan)); }
.vdt-dth-ccard__ic svg { width: 28px; height: 28px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.vdt-dth-ccard__tag {
  padding: 6px 12px;
  border-radius: 999px;
  font-size: .74rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .03em;
  background: rgba(30, 91, 255, .09);
  color: var(--dth-blue);
}
.vdt-dth-ccard--featured .vdt-dth-ccard__tag { background: linear-gradient(135deg, #ffd166, var(--dth-gold)); color: #12233f; }
.vdt-dth-ccard h3 { font-size: 1.24rem; line-height: 1.3; margin: 0 0 10px; }
.vdt-dth-ccard__desc { color: var(--dth-muted); font-size: .95rem; line-height: 1.62; margin: 0 0 18px; }
.vdt-dth-ccard__price {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 14px 16px;
  border-radius: 14px;
  background: var(--dth-soft);
  margin-bottom: 16px;
}
.vdt-dth-ccard__price small { font-size: .8rem; color: var(--dth-muted); }
.vdt-dth-ccard__price strong { font-size: 1.32rem; color: var(--dth-navy); font-weight: 800; }
.vdt-dth-ccard__price em { font-size: .82rem; color: var(--dth-muted); font-style: normal; }
.vdt-dth-ccard__meta { list-style: none; margin: 0 0 22px; padding: 0; display: grid; gap: 11px; }
.vdt-dth-ccard__meta li { display: flex; align-items: flex-start; gap: 10px; font-size: .92rem; color: var(--dth-ink); line-height: 1.5; }
.vdt-dth-ccard__meta .vdt-dth-inline-ic { flex: 0 0 auto; width: 19px; height: 19px; color: var(--dth-cyan); margin-top: 1px; }
.vdt-dth-ccard__cta { margin-top: auto; display: flex; flex-direction: column; gap: 9px; }
.vdt-dth-ccard__cta .vdt-btn { width: 100%; }
.vdt-dth-ccard__detail {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: .9rem;
  font-weight: 700;
  color: var(--dth-blue);
  text-decoration: none;
}
.vdt-dth-ccard__detail .vdt-dth-inline-ic { width: 16px; height: 16px; transition: transform .2s ease; }
.vdt-dth-ccard__detail:hover .vdt-dth-inline-ic { transform: translateX(3px); }
.vdt-dth-distinction {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  max-width: 860px;
  margin: 26px auto 0;
  padding: 16px 20px;
  border-radius: 16px;
  background: rgba(30, 91, 255, .05);
  border: 1px solid rgba(30, 91, 255, .16);
  font-size: .94rem;
  color: var(--dth-ink);
  line-height: 1.6;
}
.vdt-dth-distinction .vdt-dth-inline-ic { flex: 0 0 auto; width: 22px; height: 22px; color: var(--dth-blue); margin-top: 1px; }
.vdt-dth-distinction a { color: var(--dth-blue); font-weight: 700; }

/* ---------- Program accordion ---------- */
.vdt-dth-acc { display: grid; gap: 12px; max-width: 900px; margin: 0 auto; }
.vdt-dth-acc__item {
  border: 1px solid var(--dth-line);
  border-radius: 16px;
  background: #fff;
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(11, 31, 58, .05);
}
.vdt-dth-acc__item[open] { border-color: rgba(30, 91, 255, .35); box-shadow: var(--dth-shadow); }
.vdt-dth-acc__item summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
  font-weight: 700;
  color: var(--dth-navy);
  font-size: 1.02rem;
}
.vdt-dth-acc__item summary::-webkit-details-marker { display: none; }
.vdt-dth-acc__num {
  flex: 0 0 auto;
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 11px;
  color: #fff;
  background: linear-gradient(135deg, var(--dth-blue), var(--dth-cyan));
}
.vdt-dth-acc__num svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.vdt-dth-acc__title { flex: 1; }
.vdt-dth-acc__chev {
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  fill: none;
  stroke: var(--dth-muted);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform .25s ease;
}
.vdt-dth-acc__item[open] .vdt-dth-acc__chev { transform: rotate(180deg); }
.vdt-dth-acc__body { padding: 0 20px 20px 72px; }
.vdt-dth-acc__body p { margin: 0; color: var(--dth-muted); font-size: .96rem; line-height: 1.66; }

/* ---------- Audience grid ---------- */
.vdt-dth-aud-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.vdt-dth-aud-card {
  display: flex;
  align-items: flex-start;
  gap: 15px;
  padding: 22px;
  border-radius: 18px;
  background: #fff;
  border: 1px solid var(--dth-line);
  transition: transform .25s ease, box-shadow .25s ease;
}
.vdt-dth-aud-card:hover { transform: translateY(-4px); box-shadow: var(--dth-shadow); }
.vdt-dth-aud-card .vdt-dth-ic {
  flex: 0 0 auto;
  display: inline-grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 13px;
  color: var(--dth-blue);
  background: rgba(30, 91, 255, .09);
}
.vdt-dth-aud-card p { margin: 0; font-size: .96rem; color: var(--dth-ink); line-height: 1.55; }

/* ---------- Trust / E-E-A-T ---------- */
.vdt-dth-trust__grid {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 24px;
  align-items: start;
}
.vdt-dth-trust-card {
  padding: 28px;
  border-radius: var(--dth-radius);
  background: #fff;
  border: 1px solid var(--dth-line);
  box-shadow: var(--dth-shadow);
}
.vdt-dth-trust-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 16px; }
.vdt-dth-trust-list li { display: flex; align-items: flex-start; gap: 13px; }
.vdt-dth-trust-list .vdt-dth-ic {
  flex: 0 0 auto;
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 11px;
  color: #0f7893;
  background: rgba(0, 184, 217, .1);
}
.vdt-dth-trust-list strong { display: block; color: var(--dth-navy); font-size: 1rem; margin-bottom: 3px; }
.vdt-dth-trust-list span { color: var(--dth-muted); font-size: .93rem; line-height: 1.6; }
.vdt-dth-legal-note {
  display: flex;
  gap: 14px;
  padding: 22px;
  border-radius: 18px;
  background: linear-gradient(135deg, #0b1f3a, #12335f);
  color: #fff;
}
.vdt-dth-legal-note .vdt-dth-ic {
  flex: 0 0 auto;
  display: inline-grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 12px;
  color: #12233f;
  background: linear-gradient(135deg, #ffd166, var(--dth-gold));
}
.vdt-dth-page .vdt-dth-legal-note h3 { color: #fff; font-size: 1.06rem; margin: 0 0 8px; }
.vdt-dth-legal-note p { margin: 0 0 10px; color: rgba(255, 255, 255, .84); font-size: .92rem; line-height: 1.62; }
.vdt-dth-legal-note p:last-child { margin-bottom: 0; }

/* ---------- Benefits ---------- */
.vdt-dth-benefit-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.vdt-dth-benefit {
  padding: 26px;
  border-radius: 20px;
  background: #fff;
  border: 1px solid var(--dth-line);
  box-shadow: 0 10px 30px rgba(11, 31, 58, .06);
  transition: transform .25s ease, box-shadow .25s ease;
}
.vdt-dth-benefit:hover { transform: translateY(-5px); box-shadow: var(--dth-shadow-lg); }
.vdt-dth-benefit .vdt-dth-ic {
  display: inline-grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: 15px;
  color: #fff;
  background: linear-gradient(135deg, var(--dth-blue), var(--dth-cyan));
  margin-bottom: 16px;
}
.vdt-dth-benefit .vdt-dth-ic svg { width: 27px; height: 27px; }
.vdt-dth-benefit h3 { font-size: 1.1rem; margin: 0 0 8px; }
.vdt-dth-benefit p { margin: 0; color: var(--dth-muted); font-size: .94rem; line-height: 1.6; }

/* ---------- On-site training CTA ---------- */
.vdt-dth-onsite__inner {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
  padding: clamp(30px, 4.4vw, 52px);
  border-radius: var(--dth-radius);
  color: #fff;
  background:
    radial-gradient(700px 320px at 88% -20%, rgba(0, 184, 217, .3), transparent 60%),
    linear-gradient(135deg, #0b1f3a, #163a6b);
}
.vdt-dth-page .vdt-dth-onsite__inner h2 { color: #fff; font-size: clamp(1.5rem, 2.3vw, 2rem); margin: 0 0 12px; }
.vdt-dth-onsite__inner p { color: rgba(255, 255, 255, .86); font-size: 1.02rem; line-height: 1.66; margin: 0 0 22px; }
.vdt-dth-onsite__actions { display: flex; flex-wrap: wrap; gap: 12px; }
.vdt-dth-onsite__media { position: relative; }
.vdt-dth-onsite__media img {
  width: 100%;
  border-radius: 18px;
  display: block;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid rgba(255, 255, 255, .16);
}

/* ---------- Schedule ---------- */
.vdt-dth-sched-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 30px;
}
.vdt-dth-sched-card {
  display: flex;
  flex-direction: column;
  padding: 24px;
  border-radius: 20px;
  background: #fff;
  border: 1px solid var(--dth-line);
  box-shadow: var(--dth-shadow);
  transition: transform .25s ease, box-shadow .25s ease;
}
.vdt-dth-sched-card:hover { transform: translateY(-4px); box-shadow: var(--dth-shadow-lg); }
.vdt-dth-sched-card__top { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.vdt-dth-sched-card__ic {
  display: inline-grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 13px;
  color: var(--dth-blue);
  background: rgba(30, 91, 255, .09);
}
.vdt-dth-sched-card__ic svg { width: 24px; height: 24px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.vdt-dth-sched-badge {
  display: inline-flex;
  align-items: center;
  padding: 5px 11px;
  border-radius: 999px;
  font-size: .76rem;
  font-weight: 700;
  background: rgba(18, 183, 106, .12);
  color: #027a48;
}
.vdt-dth-sched-badge--info { background: rgba(30, 91, 255, .1); color: var(--dth-blue); }
.vdt-dth-sched-card h3 { font-size: 1.1rem; margin: 0 0 6px; }
.vdt-dth-sched-card p { margin: 0 0 16px; color: var(--dth-muted); font-size: .9rem; line-height: 1.55; }
.vdt-dth-sched-card__foot { margin-top: auto; display: flex; align-items: center; justify-content: space-between; gap: 10px; padding-top: 14px; border-top: 1px solid var(--dth-line); }
.vdt-dth-sched-card__foot span { font-size: .84rem; color: var(--dth-muted); }
.vdt-dth-sched-card__foot a { color: var(--dth-blue); font-weight: 700; font-size: .9rem; text-decoration: none; }
.vdt-dth-sched__cta { text-align: center; }

/* ---------- FAQ ---------- */
.vdt-dth-faq { max-width: 880px; margin: 0 auto; display: grid; gap: 12px; }
.vdt-dth-faq__item {
  border: 1px solid var(--dth-line);
  border-radius: 16px;
  background: #fff;
  overflow: hidden;
}
.vdt-dth-faq__item[open] { border-color: rgba(30, 91, 255, .35); box-shadow: var(--dth-shadow); }
.vdt-dth-faq__item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
  font-weight: 700;
  color: var(--dth-navy);
  font-size: 1rem;
}
.vdt-dth-faq__item summary::-webkit-details-marker { display: none; }
.vdt-dth-faq__item summary::after {
  content: "";
  flex: 0 0 auto;
  width: 12px;
  height: 12px;
  border-right: 2px solid var(--dth-muted);
  border-bottom: 2px solid var(--dth-muted);
  transform: rotate(45deg);
  transition: transform .25s ease;
}
.vdt-dth-faq__item[open] summary::after { transform: rotate(-135deg); }
.vdt-dth-faq__item p { margin: 0; padding: 0 20px 20px; color: var(--dth-muted); font-size: .95rem; line-height: 1.66; }

/* ---------- Registration form ---------- */
.vdt-dth-form__layout {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: clamp(24px, 3.4vw, 44px);
  align-items: start;
}
.vdt-dth-form__aside h2 { font-size: clamp(1.5rem, 2.2vw, 2rem); margin: 0 0 12px; }
.vdt-dth-form__aside > p { color: var(--dth-muted); font-size: 1rem; line-height: 1.66; margin: 0 0 22px; }
.vdt-dth-contact { display: grid; gap: 12px; margin-bottom: 20px; }
.vdt-dth-contact li { display: flex; align-items: flex-start; gap: 12px; list-style: none; }
.vdt-dth-contact .vdt-dth-ic {
  flex: 0 0 auto;
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 11px;
  color: var(--dth-blue);
  background: rgba(30, 91, 255, .09);
}
.vdt-dth-contact strong { display: block; font-size: .82rem; color: var(--dth-muted); font-weight: 600; }
.vdt-dth-contact a, .vdt-dth-contact span { color: var(--dth-navy); font-weight: 700; text-decoration: none; font-size: .98rem; }
.vdt-dth-form__note {
  padding: 14px 16px;
  border-radius: 12px;
  background: rgba(245, 184, 66, .12);
  border: 1px solid rgba(245, 184, 66, .35);
  color: #8a5a06;
  font-size: .86rem;
  line-height: 1.55;
}
.vdt-dth-form__alt { margin: 14px 0 0; font-size: .9rem; color: var(--dth-muted); }
.vdt-dth-form__alt a { color: var(--dth-blue); font-weight: 700; }
.vdt-dth-form__card {
  padding: clamp(22px, 3vw, 32px);
  border-radius: var(--dth-radius);
  background: #fff;
  border: 1px solid var(--dth-line);
  box-shadow: var(--dth-shadow);
}
.vdt-dth-form__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.vdt-dth-form__grid label { display: flex; flex-direction: column; gap: 7px; font-size: .9rem; font-weight: 600; color: var(--dth-navy); }
.vdt-dth-form__grid label.is-full { grid-column: 1 / -1; }
.vdt-dth-form__card input,
.vdt-dth-form__card select,
.vdt-dth-form__card textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--dth-line);
  background: #fbfdff;
  font: inherit;
  font-weight: 500;
  color: var(--dth-ink);
  transition: border-color .2s ease, box-shadow .2s ease;
}
.vdt-dth-form__card input:focus,
.vdt-dth-form__card select:focus,
.vdt-dth-form__card textarea:focus {
  outline: none;
  border-color: var(--dth-blue);
  box-shadow: 0 0 0 3px rgba(30, 91, 255, .14);
}
.vdt-dth-form__card textarea { resize: vertical; min-height: 96px; }
.vdt-dth-consent {
  display: flex;
  align-items: flex-start;
  gap: 11px;
  margin: 16px 0;
  font-size: .9rem;
  color: var(--dth-muted);
  line-height: 1.5;
  font-weight: 500;
}
.vdt-dth-consent input { flex: 0 0 auto; width: 18px; height: 18px; margin-top: 2px; accent-color: var(--dth-blue); }
.vdt-dth-consent a { color: var(--dth-blue); font-weight: 700; }
.vdt-dth-form__card .vdt-btn { width: 100%; min-height: 54px; }
.vdt-dth-hp { position: absolute !important; left: -10000px !important; width: 1px; height: 1px; overflow: hidden; }
.vdt-dth-form__card .vdt-form__message { margin-top: 14px; }
.vdt-dth-form__card .vdt-form__message.is-success {
  padding: 16px 18px;
  border-radius: 14px;
  background: rgba(18, 183, 106, .1);
  border: 1px solid rgba(18, 183, 106, .32);
  color: #027a48;
  display: block;
}
.vdt-dth-form__card .vdt-form__message.is-error {
  padding: 12px 16px;
  border-radius: 12px;
  background: rgba(240, 68, 56, .09);
  border: 1px solid rgba(240, 68, 56, .3);
  color: #b42318;
}
.vdt-dth-form__card .vdt-form__cta { display: inline-flex; flex-wrap: wrap; gap: 10px; margin-top: 12px; }
.vdt-dth-form__card .vdt-form__cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 16px;
  border-radius: 999px;
  font-weight: 700;
  font-size: .88rem;
  text-decoration: none;
}
.vdt-dth-form__card .vdt-form__cta-btn--call { background: var(--dth-blue); color: #fff; }
.vdt-dth-form__card .vdt-form__cta-btn--zalo { background: #fff; color: var(--dth-blue); border: 1px solid var(--dth-blue); }
.vdt-dth-form__card .vdt-form__code { display: block; margin-top: 8px; font-size: .9rem; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .vdt-dth-hero__grid { grid-template-columns: 1fr; }
  .vdt-dth-hero__media { max-width: 560px; }
  .vdt-dth-quick { margin-top: clamp(-30px, -3vw, -40px); }
  .vdt-dth-trust__grid { grid-template-columns: 1fr; }
  .vdt-dth-form__layout { grid-template-columns: 1fr; }
  .vdt-dth-onsite__inner { grid-template-columns: 1fr; }
  .vdt-dth-onsite__media { order: -1; max-width: 520px; }
}
@media (max-width: 860px) {
  .vdt-dth-quick__grid { grid-template-columns: repeat(2, 1fr); }
  .vdt-dth-course-grid { grid-template-columns: 1fr; max-width: 520px; margin: 0 auto; }
  .vdt-dth-aud-grid { grid-template-columns: repeat(2, 1fr); }
  .vdt-dth-benefit-grid { grid-template-columns: repeat(2, 1fr); }
  .vdt-dth-sched-grid { grid-template-columns: 1fr; max-width: 520px; margin: 0 auto 30px; }

  /* Decision table → stacked cards */
  .vdt-dth-decision__table { border: none; box-shadow: none; background: transparent; overflow: visible; }
  .vdt-dth-decision__head { display: none; }
  .vdt-dth-dc-row {
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 20px;
    border: 1px solid var(--dth-line);
    border-radius: 18px;
    background: #fff !important;
    box-shadow: var(--dth-shadow);
    margin-bottom: 14px;
  }
  .vdt-dth-dc-act { justify-self: start; }
  .vdt-dth-dc-label { display: block; }
}
@media (max-width: 560px) {
  .vdt-dth-quick__grid { grid-template-columns: 1fr; }
  .vdt-dth-aud-grid { grid-template-columns: 1fr; }
  .vdt-dth-benefit-grid { grid-template-columns: 1fr; }
  .vdt-dth-form__grid { grid-template-columns: 1fr; }
  .vdt-dth-form__grid label.is-full { grid-column: auto; }
  .vdt-dth-hero__actions .vdt-btn { width: 100%; }
  .vdt-dth-acc__body { padding-left: 20px; }
  .vdt-dth-hero h1 { font-size: clamp(1.7rem, 7vw, 2.1rem); }
}

@media (prefers-reduced-motion: reduce) {
  .vdt-dth-hero { animation: none; }
  .vdt-dth-quick-card, .vdt-dth-ccard, .vdt-dth-aud-card, .vdt-dth-benefit, .vdt-dth-sched-card { transition: none; }
}