/* =========================================================
   Rocket AI — Premium visual concept
   Chỉ thay lớp trình bày; giữ nguyên khung nội dung và luồng checkout.
   ========================================================= */

:root {
  --c-bg: #f8faff;
  --c-bg-soft: #f1f4fb;
  --c-bg-tint: #eef2ff;
  --c-surface: #ffffff;
  --c-ink: #0a1022;
  --c-ink-2: #34405e;
  --c-muted: #66718d;
  --c-muted-2: #8791a9;
  --c-line: #dfe5f1;
  --c-line-strong: #c8d1e3;
  --c-brand: #5b5cf0;
  --c-brand-2: #3977ff;
  --c-brand-deep: #3c3db6;
  --c-brand-soft: #ececff;
  --c-brand-tint: #f5f5ff;
  --c-accent: #a94d00;
  --c-accent-2: #ff9f1c;
  --c-accent-soft: #fff3dc;
  --r-lg: 20px;
  --r-xl: 28px;
  --sh-md: 0 14px 34px rgba(25, 38, 79, .10), 0 2px 8px rgba(25, 38, 79, .05);
  --sh-lg: 0 28px 70px rgba(15, 25, 61, .16), 0 6px 20px rgba(15, 25, 61, .08);
  --sh-brand: 0 12px 30px rgba(75, 91, 235, .30);
  --container: 1180px;
}

html { overflow-x: hidden; }

body {
  background:
    radial-gradient(circle at 15% 18%, rgba(91, 92, 240, .05), transparent 28%),
    var(--c-bg);
}

.announce {
  position: relative;
  z-index: 5;
  background: #070b18;
  border-bottom: 1px solid rgba(139, 156, 255, .2);
}

.announce__inner { min-height: 44px; }

.announce__dot {
  background: #54e6a6;
  box-shadow: 0 0 0 4px rgba(84, 230, 166, .12), 0 0 18px rgba(84, 230, 166, .55);
}

.hero {
  color: #c8d1eb;
  min-height: min(900px, calc(100dvh - 44px));
  display: flex;
  align-items: center;
  padding-block: clamp(64px, 8vw, 112px);
  background:
    radial-gradient(850px 560px at 78% 20%, rgba(88, 71, 255, .24), transparent 62%),
    radial-gradient(600px 400px at 4% 88%, rgba(0, 204, 255, .12), transparent 66%),
    linear-gradient(135deg, #070b18 0%, #0b1024 47%, #101638 100%);
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: .15;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(149, 164, 255, .2) 1px, transparent 1px),
    linear-gradient(90deg, rgba(149, 164, 255, .2) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(to bottom, #000, transparent 88%);
}

.hero::after {
  height: 130px;
  background: linear-gradient(to bottom, transparent, rgba(248, 250, 255, .95));
  border: 0;
}

.hero__grid { position: relative; z-index: 1; }

.hero__brand { color: #f5f7ff; letter-spacing: .02em; }

.hero__brand-mark {
  border: 1px solid rgba(255,255,255,.2);
  background: linear-gradient(135deg, #7b67ff, #3c8cff);
  box-shadow: 0 0 34px rgba(92, 104, 255, .45);
}

.hero h1 { color: #f7f8ff; max-width: 14ch; text-wrap: balance; }
.hero h1 em {
  background: linear-gradient(100deg, #72e9ff 5%, #a78bfa 52%, #ffbd68 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__lead { color: #aeb9d8; max-width: 52ch; }

.hero__fact {
  color: #dbe2f8;
  background: rgba(255, 255, 255, .055);
  border-color: rgba(174, 188, 255, .16);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.05);
  backdrop-filter: blur(10px);
}
.hero__fact svg { color: #7de5ff; }

.hero__price-num { color: #fff; font-variant-numeric: tabular-nums; }
.hero__price-label, .hero .btn-note { color: #98a6cb; }

.hero .btn-primary,
.offer .btn-primary,
.finalcta .btn-primary {
  color: #091020;
  background: linear-gradient(115deg, #82edff 0%, #9aa3ff 48%, #ffbd68 100%);
  box-shadow: 0 14px 38px rgba(99, 145, 255, .34);
}

.hero .btn-primary:hover,
.offer .btn-primary:hover,
.finalcta .btn-primary:hover {
  box-shadow: 0 18px 48px rgba(99, 145, 255, .46);
}

.hero__trust { border-color: rgba(174, 188, 255, .16); }
.hero__trust-item strong { color: #fff; }
.hero__trust-item span { color: #93a0c2; }

.hero__panel {
  position: relative;
  padding: 18px;
  overflow: hidden;
  background: rgba(12, 18, 43, .78);
  border-color: rgba(165, 178, 255, .20);
  box-shadow: 0 34px 90px rgba(0, 0, 0, .38), inset 0 1px 0 rgba(255,255,255,.08);
  backdrop-filter: blur(20px);
}

.hero__panel::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(135deg, rgba(115, 99, 255, .10), transparent 42%, rgba(44, 208, 255, .06));
}

.agent-system {
  position: relative;
  min-height: 330px;
  margin-bottom: 18px;
  overflow: hidden;
  border: 1px solid rgba(159, 175, 255, .15);
  border-radius: 20px;
  background:
    radial-gradient(circle at 50% 51%, rgba(105, 91, 255, .2), transparent 35%),
    rgba(4, 8, 23, .56);
}

.agent-system__grid {
  position: absolute;
  inset: 0;
  opacity: .2;
  background-image:
    linear-gradient(rgba(139, 154, 255, .20) 1px, transparent 1px),
    linear-gradient(90deg, rgba(139, 154, 255, .20) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: radial-gradient(circle, #000 20%, transparent 76%);
}

.agent-system__status {
  position: absolute;
  top: 16px;
  left: 16px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 10px;
  border: 1px solid rgba(91, 230, 181, .18);
  border-radius: 999px;
  color: #9eebd0;
  background: rgba(20, 96, 76, .14);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.agent-system__status i { width: 6px; height: 6px; border-radius: 50%; background: #61e8b9; box-shadow: 0 0 12px #61e8b9; }

.agent-system__orbit {
  position: absolute;
  left: 50%;
  top: 53%;
  border: 1px solid rgba(144, 160, 255, .19);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}
.agent-system__orbit--one { width: 210px; height: 210px; }
.agent-system__orbit--two { width: 290px; height: 290px; border-style: dashed; opacity: .72; }

.agent-system__core {
  position: absolute;
  left: 50%;
  top: 53%;
  z-index: 2;
  width: 128px;
  height: 128px;
  border: 1px solid rgba(173, 186, 255, .38);
  border-radius: 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transform: translate(-50%, -50%) rotate(3deg);
  background: linear-gradient(145deg, rgba(113, 95, 255, .52), rgba(31, 45, 109, .58));
  box-shadow: 0 0 54px rgba(94, 86, 255, .34), inset 0 1px 0 rgba(255,255,255,.16);
}

.agent-system__core > * { transform: rotate(-3deg); }
.agent-system__core-mark { display: grid; place-items: center; width: 34px; height: 34px; margin-bottom: 7px; border-radius: 10px; color: #fff; background: linear-gradient(135deg, #6fe9ff, #866cff); font-weight: 800; }
.agent-system__core strong { color: #fff; font-size: 14px; }
.agent-system__core small { color: #aab8dd; font-size: 10px; text-transform: uppercase; letter-spacing: .10em; }

.agent-system__node {
  position: absolute;
  z-index: 3;
  min-width: 112px;
  padding: 9px 11px;
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid rgba(158, 174, 255, .20);
  border-radius: 12px;
  color: #dbe4ff;
  background: rgba(18, 27, 62, .88);
  box-shadow: 0 8px 24px rgba(0,0,0,.2);
  font-size: 11px;
  font-weight: 600;
}
.agent-system__node svg { width: 15px; height: 15px; color: #7de5ff; }
.agent-system__node--brain { top: 66px; left: 36px; }
.agent-system__node--marketing { top: 78px; right: 25px; }
.agent-system__node--sales { bottom: 40px; left: 30px; }
.agent-system__node--workflow { bottom: 32px; right: 24px; }

.hero__panel-head { position: relative; border-color: rgba(164,178,255,.15); }
.hero__panel-head h3 { color: #f5f7ff; }
.hero__panel .badge--accent { color: #ffd49b; background: rgba(255, 173, 66, .12); }
.hero__session { position: relative; }
.hero__session + .hero__session { border-color: rgba(164,178,255,.14); }
.hero__session-no { color: #b9c9ff; background: rgba(100, 110, 255, .16); }
.hero__session-body b { color: #eef1ff; }
.hero__session-body span { color: #8f9cbd; }

.section { isolation: isolate; }
.section h2 { text-wrap: balance; }
.section-head { margin-bottom: clamp(32px, 5vw, 56px); }

.section:nth-of-type(odd)::before {
  content: '';
  position: absolute;
  z-index: -1;
  width: min(560px, 70vw);
  height: min(560px, 70vw);
  right: -22%;
  top: 8%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(91,92,240,.065), transparent 68%);
  pointer-events: none;
}

.card,
.ladder__row,
.questions li,
.session,
.agent,
.fit__col,
.team-card,
.proof-card,
.course,
.fee__point {
  border-color: rgba(165, 177, 205, .38);
  box-shadow: 0 10px 32px rgba(27, 38, 76, .055);
}

.card,
.session,
.team-card,
.proof-card,
.course {
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

@media (hover: hover) {
  .card:hover,
  .session:hover,
  .team-card:hover,
  .proof-card:hover,
  .course:hover {
    transform: translateY(-4px);
    border-color: rgba(91, 92, 240, .32);
    box-shadow: 0 20px 46px rgba(29, 39, 81, .11);
  }
}

.eyebrow {
  padding: 6px 10px;
  border: 1px solid rgba(91, 92, 240, .15);
  border-radius: 999px;
  background: rgba(91, 92, 240, .055);
  letter-spacing: .12em;
}
.eyebrow::before { width: 7px; height: 7px; border-radius: 50%; opacity: 1; }

.whynow__quote {
  padding: 24px 28px;
  border: 1px solid rgba(91, 92, 240, .18);
  border-left: 4px solid var(--c-brand);
  border-radius: 0 20px 20px 0;
  background: linear-gradient(100deg, rgba(91,92,240,.08), rgba(255,255,255,.65));
}

.whynow__step--active { background: linear-gradient(135deg, var(--c-brand-2), var(--c-brand)); box-shadow: var(--sh-brand); }

.problem__card { position: relative; overflow: hidden; }
.problem__card::before { content: ''; position: absolute; inset: 0 auto 0 0; width: 3px; background: linear-gradient(#6f79ff, #42d8ff); }
.problem__closing { background: linear-gradient(120deg, #f0f1ff, #eefaff); }

.ladder__row--last {
  background: linear-gradient(120deg, #f1f2ff, #effaff);
  box-shadow: 0 18px 46px rgba(72, 88, 192, .12);
}

.session { border-radius: 24px; }
.session__head { background: linear-gradient(135deg, #eef0ff, #f1fbff); }
.session:nth-child(2) .session__head { background: linear-gradient(135deg, #f4efff, #fff3fb); }
.session:nth-child(3) .session__head { background: linear-gradient(135deg, #edfaff, #eff5ff); }
.session__no { background: linear-gradient(135deg, var(--c-brand-2), var(--c-brand)); }

#demo-trong-zoom,
#\34-khoa-hoc {
  color: #b8c2df;
  background:
    radial-gradient(700px 420px at 10% 10%, rgba(70, 155, 255, .13), transparent 70%),
    linear-gradient(145deg, #090e20, #111837);
}
#demo-trong-zoom h2,
#demo-trong-zoom h3,
#demo-trong-zoom strong,
#\34-khoa-hoc h2,
#\34-khoa-hoc h3 { color: #f5f7ff; }
#demo-trong-zoom .section-head p,
#\34-khoa-hoc .section-head p { color: #9aa7ca; }
#demo-trong-zoom .eyebrow,
#\34-khoa-hoc .eyebrow { color: #91e6ff; border-color: rgba(118,221,255,.18); background: rgba(95,210,255,.07); }
#demo-trong-zoom .eyebrow::before,
#\34-khoa-hoc .eyebrow::before { background: #73e3ff; }
#demo-trong-zoom .agent,
#\34-khoa-hoc .course {
  background: rgba(255,255,255,.055);
  border-color: rgba(159,174,255,.16);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.04);
}
#demo-trong-zoom .agent p,
#\34-khoa-hoc .course p { color: #a4b0cf; }
#demo-trong-zoom .agent__name,
#\34-khoa-hoc .course__no { color: #88e8ff; }
#\34-khoa-hoc .course__no { background: rgba(102, 116, 255, .17); }

.team-banner { box-shadow: var(--sh-lg); border: 6px solid #fff; }
.team-card__role { color: var(--c-brand-deep); }

.offer {
  background:
    radial-gradient(650px 380px at 85% 20%, rgba(105, 93, 255, .25), transparent 65%),
    linear-gradient(145deg, #070b18, #121b45 62%, #18245d);
}
.offer__card {
  background: rgba(255,255,255,.065);
  border-color: rgba(169, 184, 255, .2);
  box-shadow: 0 30px 80px rgba(0,0,0,.22), inset 0 1px 0 rgba(255,255,255,.07);
  backdrop-filter: blur(16px);
}

.finalcta {
  background:
    radial-gradient(620px 320px at 50% 0%, rgba(111, 93, 255, .22), transparent 66%),
    linear-gradient(160deg, #0a0e20, #121a3d);
}
.finalcta h2 { color: #f5f7ff; }
.finalcta__lead { color: #aeb9d8; }
.finalcta__flow { color: #dbe2f8; }
.finalcta__flow span { background: rgba(255,255,255,.06); border-color: rgba(165,178,255,.18); }
.finalcta__flow i { color: #7181ad; }
.finalcta .btn-note { color: #98a6cb; }

@media (max-width: 940px) {
  .hero { min-height: auto; }
  .hero h1 { max-width: 17ch; }
  .agent-system { min-height: 360px; }
}

@media (max-width: 620px) {
  :root { --section-y: 64px; }
  .hero { padding-block: 48px 40px; }
  .hero h1 { font-size: clamp(2.05rem, 10.5vw, 3rem); }
  .hero__lead { font-size: 1rem; }
  .hero__price { align-items: flex-start; flex-direction: column; gap: 2px; }
  .hero__facts { margin-block: 22px 26px; }
  .hero__fact { width: 100%; border-radius: 12px; }
  .hero .btn-primary { width: 100%; padding-inline: 18px; }
  .hero__trust { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
  .hero__trust-item strong { font-size: 1.15rem; }
  .hero__trust-item span { display: block; font-size: 11px; line-height: 1.4; }
  .hero__panel { padding: 12px; border-radius: 22px; }
  .agent-system { min-height: 320px; }
  .agent-system__orbit--one { width: 176px; height: 176px; }
  .agent-system__orbit--two { width: 250px; height: 250px; }
  .agent-system__core { width: 106px; height: 106px; border-radius: 26px; }
  .agent-system__node { min-width: 96px; padding: 8px; font-size: 10px; }
  .agent-system__node--brain { top: 64px; left: 12px; }
  .agent-system__node--marketing { top: 74px; right: 10px; }
  .agent-system__node--sales { bottom: 34px; left: 10px; }
  .agent-system__node--workflow { bottom: 28px; right: 8px; }
  .whynow__quote { padding: 20px; }
}

@media (max-width: 370px) {
  .agent-system__node span { display: none; }
  .agent-system__node { min-width: 38px; width: 38px; height: 38px; justify-content: center; padding: 0; }
  .hero__trust { grid-template-columns: 1fr; }
}