:root{
  --bg:#020817;
  --gold:#f2cf79;
  --gold-dark:#c9962c;
  --text:#fff8e8;
  --muted:#d5d8df;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;
}

/* HERO */
.hero{
  min-height:100svh;
  position:relative;
  display:flex;
  align-items:center;
  justify-content:center;
  text-align:center;
  padding:120px 18px 28px;
  overflow:hidden;
}

.hero-video,.hero-fallback,.hero-overlay{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
}

.hero-video{
  object-fit:cover;
  z-index:0;
}

.hero-fallback{
  background:
    linear-gradient(to bottom,rgba(2,8,23,.12),rgba(2,8,23,.72) 58%,#020817 100%),
    url("assets/images/hoc-vien-ngan-hang.jpg") center 58%/cover no-repeat;
  z-index:-1;
}

.hero-overlay{
  background:
    radial-gradient(circle at 50% 18%,rgba(242,207,121,.24),transparent 34%),
    linear-gradient(to bottom,rgba(0,0,0,.18),rgba(0,0,0,.72));
  z-index:1;
}

.hero-content{
  position:relative;
  z-index:2;
  width:min(980px,100%);
  margin-top:130px;
}

.invite-title{
  display:inline-block;
  font-size:clamp(42px,12vw,88px);
  font-weight:950;
  letter-spacing:.14em;
  color:var(--gold);
  padding:10px 24px;
  border-top:2px solid rgba(242,207,121,.9);
  border-bottom:2px solid rgba(242,207,121,.9);
  text-shadow:0 10px 35px rgba(0,0,0,.55);
}

.hero-line{
  width:88px;
  height:1px;
  margin:24px auto 16px;
  background:linear-gradient(90deg,transparent,var(--gold),transparent);
}

.event-name{
  font-size:clamp(76px,22vw,170px);
  line-height:.78;
  font-weight:950;
  letter-spacing:-.09em;
  color:var(--gold);
  text-shadow:0 18px 60px rgba(0,0,0,.55);
}

.event-slogan{
  margin-top:16px;
  font-size:clamp(25px,7vw,58px);
  line-height:1.05;
  font-weight:950;
  letter-spacing:-.045em;
  color:#fff8e8;
  white-space:nowrap;
  text-shadow:0 14px 50px rgba(0,0,0,.6);
}

.event-desc{
  margin-top:22px;
  color:#e5e7ee;
  font-size:clamp(15px,4vw,21px);
  line-height:1.55;
  font-weight:600;
}

.event-date{
  margin-top:22px;
  color:var(--gold);
  font-size:clamp(28px,8vw,52px);
  letter-spacing:.16em;
  font-weight:950;
  text-shadow:0 12px 38px rgba(0,0,0,.55);
}

.scroll-hint{
  margin-top:34px;
  color:#d5d8df;
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  opacity:.8;
}

/* COMMON */
section{
  min-height:100svh;
  padding:72px 20px;
  display:flex;
  align-items:center;
  justify-content:center;
  text-align:center;
}

.section-inner{width:min(980px,100%)}

.section-label{
  color:var(--gold);
  letter-spacing:.22em;
  text-transform:uppercase;
  font-size:12px;
  font-weight:850;
  margin-bottom:18px;
}

h2{
  font-size:clamp(38px,11vw,80px);
  line-height:.95;
  letter-spacing:-.06em;
  margin:0 0 18px;
}

h2 span,.quote span{color:var(--gold)}

p,.lead{
  color:var(--muted);
  font-size:18px;
  line-height:1.7;
  max-width:760px;
  margin:14px auto;
}

/* CINEMA */
.cinema-section{display:block;padding-top:76px}

.cinema-image{
  width:min(920px,100%);
  margin:0 auto 38px;
  border-radius:34px;
  overflow:hidden;
  border:1px solid rgba(255,255,255,.16);
  box-shadow:0 40px 130px rgba(0,0,0,.58);
}

.cinema-image img{
  width:100%;
  display:block;
  filter:brightness(.78) contrast(1.08);
}

.quote{
  font-size:clamp(34px,9vw,76px);
  line-height:1.02;
  letter-spacing:-.06em;
  font-weight:920;
}

/* INVITE */
.invite-card{
  width:min(700px,100%);
  border:1px solid rgba(242,207,121,.36);
  border-radius:34px;
  padding:46px 24px;
  background:linear-gradient(180deg,rgba(255,255,255,.08),rgba(255,255,255,.035));
  backdrop-filter:blur(18px);
  box-shadow:0 38px 120px rgba(0,0,0,.48);
}

.class-label{
  color:var(--gold);
  letter-spacing:.2em;
  text-transform:uppercase;
  font-size:clamp(20px,5.8vw,34px);
  font-weight:900;
  margin-top:10px;
}

#className{
  font-size:clamp(58px,17vw,112px);
  color:var(--gold);
  font-weight:950;
  letter-spacing:-.08em;
  margin:14px 0;
}

/* DETAILS */
.details{
  display:grid;
  grid-template-columns:repeat(2, minmax(260px, 1fr));
  gap:18px;
  margin:32px auto 0;
}

.details > .detail:first-child{
  grid-column:1 / -1;
  width:min(430px,100%);
  justify-self:center;
}

.detail{
  border:1px solid rgba(255,255,255,.12);
  background:rgba(255,255,255,.06);
  border-radius:24px;
  padding:24px 18px;
}

.detail-label{
  color:var(--gold);
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  font-weight:850;
  margin-bottom:10px;
}

.detail-value{
  font-size:20px;
  font-weight:720;
  line-height:1.45;
}

/* TIMELINE */
.timeline{
  width:min(720px,100%);
  margin:36px auto 0;
  display:grid;
  gap:18px;
}

.timeline-item{
  text-align:left;
  padding:24px;
  border-radius:28px;
  border:1px solid rgba(255,255,255,.12);
  background:rgba(255,255,255,.055);
}

.year{
  color:var(--gold);
  font-size:36px;
  font-weight:950;
  letter-spacing:-.04em;
}

.timeline-text{
  margin-top:8px;
  color:var(--muted);
  font-size:18px;
  line-height:1.6;
}


/* AGENDA */
.agenda-card{
  grid-column:1 / -1;
  border:none;
  background:transparent;
  border-radius:24px;
  padding:0;
  text-align:left;
}

.agenda-group{
  margin-top:18px;
  border:1px solid rgba(242,207,121,.25);
  background:linear-gradient(180deg,rgba(255,255,255,.075),rgba(255,255,255,.035));
  border-radius:24px;
  padding:24px 18px;
}

.agenda-part{
  color:var(--gold);
  font-size:22px;
  font-weight:950;
  letter-spacing:.12em;
  text-transform:uppercase;
  margin-bottom:16px;
  text-align:center;
}

.agenda-part span{
  display:block;
  color:var(--text);
  font-size:15px;
  font-weight:800;
  letter-spacing:0;
  text-transform:none;
  margin-top:6px;
}

.agenda-row{
  display:grid;
  grid-template-columns:150px 1fr;
  gap:16px;
  padding:14px 0;
  border-top:1px solid rgba(255,255,255,.1);
}

.agenda-time{
  color:var(--gold);
  font-weight:900;
  font-size:16px;
}

.agenda-text{
  color:var(--text);
  font-size:16px;
  line-height:1.55;
}

.agenda-text small{
  display:block;
  color:var(--muted);
  font-size:14px;
  line-height:1.55;
  margin-top:6px;
}

.agenda-note{
  margin-top:12px;
  padding:12px 14px;
  border-radius:16px;
  background:rgba(242,207,121,.1);
  color:var(--gold);
  font-weight:800;
  text-align:center;
}


.location-detail,
.invite-detail{
  grid-column:1 / -1;
  width:min(620px,100%);
  justify-self:center;
  text-align:center;
  padding:30px 24px;
}

.location-detail .detail-value,
.invite-detail .detail-value{
  font-size:24px;
  line-height:1.45;
}

/* COUNTDOWN */
.countdown{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:10px;
  margin:32px auto;
  width:min(680px,100%);
}

.time-box{
  border:1px solid rgba(242,207,121,.25);
  border-radius:24px;
  padding:18px 8px;
  background:rgba(255,255,255,.07);
}

.time-box b{
  display:block;
  color:var(--gold);
  font-size:clamp(32px,8vw,52px);
}

.time-box small{
  font-size:12px;
  color:var(--muted);
  text-transform:uppercase;
  letter-spacing:.13em;
}

.buttons{
  display:grid;
  gap:14px;
  width:min(430px,100%);
  margin:28px auto;
}

.button{
  display:block;
  padding:18px 22px;
  border-radius:999px;
  text-decoration:none;
  font-weight:900;
}

.button.primary{
  background:linear-gradient(135deg,#ffe59b,#c9962c);
  color:#061126;
}

.button.secondary{
  background:rgba(255,255,255,.08);
  color:white;
  border:1px solid rgba(255,255,255,.18);
}

footer{
  text-align:center;
  padding:46px 20px 70px;
  color:var(--muted);
}

/* ANIMATION */
.reveal{
  opacity:0;
  transform:translateY(34px);
  transition:1s ease;
}

.reveal.show{
  opacity:1;
  transform:translateY(0);
}

.delay-1{transition-delay:.1s}
.delay-2{transition-delay:.25s}
.delay-3{transition-delay:.4s}
.delay-4{transition-delay:.55s}
.delay-5{transition-delay:.7s}
.delay-6{transition-delay:.85s}
.delay-7{transition-delay:1s}

/* MOBILE */
@media(max-width:720px){
  .hero{padding-top:88px}
  .hero-content{margin-top:100px}
  .details{grid-template-columns:1fr}
  .agenda-row{grid-template-columns:1fr;gap:6px}
  .agenda-card{text-align:left}
  .countdown{grid-template-columns:repeat(2,1fr)}
  .event-slogan{font-size:clamp(23px,6.4vw,40px)}
  .invite-title{letter-spacing:.1em}
}

@media(max-width:380px){
  .event-slogan{font-size:22px}
}