/* ===== Techbeat Music — Phương án B: Editorial (corporate) ===== */
:root{
  --red:#FE2E00;
  --red-deep:#8B1500;
  --black:#000;
  --raisin:#282828;
  --dim:#646464;
  --mid:#A0A0A0;
  --light:#E6E6E6;
  --light2:#F2F2F2;
  --white:#fff;
  --font:"Space Grotesk",system-ui,-apple-system,sans-serif;
  --gutter:clamp(16px,5vw,80px);
  --ease:cubic-bezier(.2,.8,.2,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;overflow-x:hidden;overflow-x:clip;scroll-padding-top:80px}
body{
  font-family:var(--font);
  background:var(--white);
  color:var(--black);
  line-height:1.5;
  overflow-x:hidden;overflow-x:clip;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
ul{list-style:none}
h1,h2,h3{font-weight:700;letter-spacing:-.03em;line-height:1}
.eyebrow{font-size:.75rem;font-weight:500;letter-spacing:.2em;text-transform:uppercase;color:var(--dim)}
.label{display:block;font-size:.72rem;font-weight:500;letter-spacing:.2em;text-transform:uppercase;color:var(--red);margin-bottom:14px}
.todo{color:var(--red);font-weight:500}
.rule{
  display:flex;justify-content:space-between;align-items:center;gap:16px;
  border-top:1px solid var(--black);padding:12px 0;margin:0 var(--gutter);
}
.rule-inner{border-top-color:var(--black);margin-top:clamp(40px,6vw,80px)}
.rule-light{border-top-color:rgba(255,255,255,.3)}
.rule-light .eyebrow{color:var(--mid)}

/* ---------- Nav ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;
  padding:18px var(--gutter);
  background:rgba(255,255,255,.85);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--light);
}
.nav-logo img{height:32px;width:auto}
.nav-links{display:flex;gap:28px;align-items:center;font-size:.9rem;font-weight:500}
.nav-links a{position:relative}
.nav-links a:not(.nav-cta)::after{
  content:"";position:absolute;left:0;right:100%;bottom:-4px;height:2px;background:var(--red);transition:right .3s var(--ease);
}
.nav-links a:not(.nav-cta):hover::after{right:0}
.nav-cta{background:var(--black);color:var(--white);padding:8px 16px}
.nav-cta:hover{background:var(--red)}
@media (max-width:720px){
  .nav-links{gap:16px;font-size:.8rem}
  .nav-logo img{height:26px}
}
@media (max-width:420px){.nav-links a:not(.nav-cta):nth-child(2){display:none}}

/* ---------- Hero ---------- */
.hero{
  position:relative;min-height:100svh;
  display:flex;flex-direction:column;justify-content:space-between;
  padding:110px var(--gutter) 48px;
  overflow:hidden;
}
.hero-meta{
  display:flex;gap:28px;flex-wrap:wrap;
  font-size:.75rem;letter-spacing:.18em;text-transform:uppercase;color:var(--dim);
  border-bottom:1px solid var(--black);padding-bottom:12px;
  animation:fade 1s both;
}
.hero-tag{
  font-size:clamp(3.4rem,12.5vw,12rem);
  letter-spacing:-.05em;line-height:.9;
  margin:clamp(24px,4vw,48px) 0;
  position:relative;z-index:1;
  max-width:14ch;
}
.hero-tag .line{display:block;overflow:hidden;padding-bottom:.06em}
.hero-tag .t{
  display:inline-block;
  animation:rise 1s var(--ease) both;
  animation-delay:calc(.15s + var(--i) * .14s);
}
.hero-sub-line{margin-top:clamp(14px,2vw,28px)}
.hero-sub-line .t{
  font-size:clamp(1rem,2.2vw,1.9rem);font-weight:500;letter-spacing:0;line-height:1.3;color:var(--raisin);
}
.t-red{color:var(--red)}
.dot{color:var(--black)}
@keyframes rise{from{transform:translateY(105%)}to{transform:none}}
@keyframes fade{from{opacity:0}to{opacity:1}}
.hero-foot{
  display:flex;justify-content:space-between;align-items:flex-end;gap:32px;flex-wrap:wrap;
  border-top:1px solid var(--black);padding-top:20px;
  animation:fade 1s .8s both;
}
.hero-brand{display:flex;flex-direction:column;gap:10px}
.hero-logo{width:min(48vw,220px);height:auto}
.hero-tagline{font-size:.72rem;letter-spacing:.24em;text-transform:uppercase;color:var(--red);font-weight:500}
.hero-sub{max-width:46ch;color:var(--dim);font-size:clamp(.9rem,1.2vw,1.05rem)}
/* dải đỏ chéo — motif // */
.hero-slash{
  position:absolute;right:-6%;top:12%;width:12vw;max-width:150px;height:76%;
  background:var(--red);
  transform:skewX(-18deg);
  animation:slashIn 1.2s .5s var(--ease) both;
}
@keyframes slashIn{from{transform:skewX(-18deg) translateY(-110%)}to{transform:skewX(-18deg) translateY(0)}}
@media (max-width:720px){.hero-slash{width:14vw;top:16%;height:58%}}

/* ---------- Về chúng tôi ---------- */
.about{padding:clamp(56px,8vw,110px) 0 clamp(72px,10vw,140px)}
.about-grid{
  display:grid;grid-template-columns:1.3fr 1fr;gap:clamp(32px,6vw,96px);
  padding:clamp(32px,5vw,72px) var(--gutter) 0;
}
.about-col h2{font-size:clamp(1.9rem,3.6vw,3.6rem);letter-spacing:-.04em;line-height:1.05;margin-bottom:22px;max-width:18ch}
.about-col p{color:var(--dim);font-size:clamp(.95rem,1.25vw,1.1rem);max-width:48ch}
.about-list li{
  border-top:1px solid var(--light);padding:16px 0 16px 36px;position:relative;
  color:var(--raisin);font-size:clamp(.95rem,1.2vw,1.05rem);
}
.about-list li::before{content:"//";position:absolute;left:0;top:16px;color:var(--red);font-weight:700}
.about-list li:last-child{border-bottom:1px solid var(--light)}
.values{margin-top:0}
.value{
  display:grid;grid-template-columns:80px 1fr 1.4fr;align-items:baseline;gap:24px;
  padding:clamp(18px,2.4vw,30px) var(--gutter);
  border-bottom:1px solid var(--light);
  transition:background .3s;
}
.value:hover{background:var(--light2)}
.value:last-child{border-bottom:1px solid var(--black)}
.value-idx{font-size:.8rem;letter-spacing:.2em;color:var(--red);font-weight:500}
.value h3{font-size:clamp(1.5rem,3.2vw,3rem);letter-spacing:-.04em}
.value p{color:var(--dim);font-size:clamp(.92rem,1.15vw,1.05rem);max-width:44ch}
@media (max-width:860px){
  .about-grid{grid-template-columns:1fr}
  .value{grid-template-columns:48px 1fr;row-gap:4px}
  .value p{grid-column:2}
}

/* ---------- 3 mảng ---------- */
.pillars{padding:clamp(56px,8vw,110px) 0 clamp(72px,10vw,140px);background:var(--light2)}
.pillar{
  position:relative;
  display:grid;grid-template-columns:80px 1fr 1.2fr auto;align-items:center;gap:24px;
  padding:clamp(28px,4vw,52px) var(--gutter);
  border-bottom:1px solid var(--black);
  transition:background .35s,color .35s;
  cursor:default;
}
.pillar:hover{background:var(--black);color:var(--white)}
.pillar-idx{font-size:.85rem;letter-spacing:.2em;color:var(--red);font-weight:500}
.pillar h2{font-size:clamp(2.6rem,6.5vw,6rem)}
.pillar-body p{color:var(--dim);max-width:40ch;font-size:clamp(.95rem,1.25vw,1.1rem);transition:color .35s;margin-bottom:14px}
.pillar-body ul li{
  font-size:.9rem;color:var(--raisin);padding:6px 0 6px 20px;position:relative;
  border-top:1px solid rgba(0,0,0,.12);transition:color .35s,border-color .35s;
}
.pillar-body ul li::before{content:"—";position:absolute;left:0;color:var(--red)}
.pillar:hover .pillar-body p{color:var(--mid)}
.pillar:hover .pillar-body ul li{color:var(--light);border-top-color:rgba(255,255,255,.2)}
.pillar-arrow{font-size:2.4rem;line-height:1;color:var(--red);transform:translateX(-10px);opacity:0;transition:all .4s var(--ease)}
.pillar:hover .pillar-arrow{transform:none;opacity:1}
@media (max-width:860px){
  .pillar{grid-template-columns:1fr;gap:10px}
  .pillar-arrow{display:none}
}

/* ---------- Event & Show ---------- */
.events{padding:clamp(56px,8vw,110px) 0 clamp(72px,10vw,140px);background:var(--white)}
.events-title{font-size:clamp(3rem,9vw,8.5rem);letter-spacing:-.05em;margin:clamp(24px,4vw,48px) var(--gutter) 0}
.event-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  margin:0 var(--gutter);
  background:var(--black);border-top:1px solid var(--black);border-bottom:1px solid var(--black);
}
.event{background:var(--white);display:flex;flex-direction:column}
.event-visual{position:relative;aspect-ratio:4/3;overflow:hidden;background:var(--light)}
.event-visual img{width:100%;height:100%;object-fit:cover;transition:transform .8s var(--ease);filter:grayscale(.15)}
.event:hover .event-visual img{transform:scale(1.04);filter:none}
.event-visual::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:repeating-linear-gradient(115deg,transparent 0 60px,rgba(0,0,0,.06) 60px 61px);
}
.event-body{padding:20px 20px 28px;border-top:1px solid var(--black);display:flex;flex-direction:column;gap:12px;flex:1}
.event-kind{color:var(--red);font-size:.68rem;letter-spacing:.2em;text-transform:uppercase;font-weight:500}
.event h3{font-size:clamp(1.3rem,1.7vw,1.7rem);letter-spacing:-.03em;line-height:1.1;min-height:2.2em}
.event-meta{display:grid;gap:0;border-top:1px solid var(--light)}
.event-meta div{display:grid;grid-template-columns:72px 1fr;gap:10px;padding:7px 0;border-bottom:1px solid var(--light);font-size:.82rem}
.event-meta dt{color:var(--dim);font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;padding-top:2px}
.event-meta dd{font-weight:500;color:var(--black)}
.event-body p{color:var(--dim);font-size:.88rem;line-height:1.5}
@media (max-width:1100px){.event-grid{grid-template-columns:1fr 1fr}}
.event-body{padding:18px 16px 24px}
.event-meta div{grid-template-columns:64px 1fr}
@media (max-width:600px){.event-grid{grid-template-columns:1fr}.event-visual{aspect-ratio:16/10}}

.event-rows{margin:0 var(--gutter);border-bottom:1px solid var(--black)}
.event-row{
  display:grid;grid-template-columns:1.6fr 1fr 1.8fr .6fr;gap:18px;align-items:baseline;
  padding:16px 0;border-top:1px solid var(--light);font-size:.92rem;
  transition:background .3s;
}
.event-row:first-child{border-top:0}
.event-row:hover{background:var(--light2)}
.er-name{font-weight:600;font-size:clamp(1rem,1.4vw,1.25rem);letter-spacing:-.02em}
.er-kind,.er-when,.er-where{color:var(--dim)}
.er-size{color:var(--red);font-weight:600;text-align:right;white-space:nowrap}
@media (max-width:860px){
  .event-row{grid-template-columns:1fr auto;row-gap:2px}
  .er-name{grid-column:1}
  .er-size{grid-column:2;grid-row:1}
  .er-kind,.er-when,.er-where{grid-column:1;font-size:.82rem}
}

/* ---------- Con số ---------- */
.stats{
  position:relative;background:var(--black);color:var(--white);
  padding:clamp(56px,8vw,110px) 0 clamp(72px,10vw,140px);overflow:hidden;
}
.stats-grid{
  display:grid;grid-template-columns:repeat(2,1fr);
  padding:clamp(32px,5vw,72px) var(--gutter) 0;
  position:relative;z-index:1;
}
.stat{padding:0 20px 0 0;border-left:1px solid rgba(255,255,255,.25);padding-left:20px}
.stat:first-child{border-left:0;padding-left:0}
.stat-n{font-size:clamp(2.8rem,6vw,6rem);font-weight:700;letter-spacing:-.05em;line-height:.95;display:flex;align-items:baseline;gap:4px}
.stat-n small{font-size:.38em;color:var(--red);font-weight:600;letter-spacing:-.02em}
.stat-l{margin-top:16px;color:var(--mid);font-size:.9rem;line-height:1.4;max-width:22ch}
.stats-mark{
  position:absolute;right:-4%;bottom:-18%;width:min(44vw,520px);
  filter:invert(1);opacity:.07;pointer-events:none;
}
@media (max-width:720px){
  .stats-grid{grid-template-columns:1fr 1fr;row-gap:40px}
  .stat:nth-child(odd){border-left:0;padding-left:0}
}

/* ---------- Liên hệ ---------- */
.contact{padding:clamp(80px,12vw,170px) var(--gutter);background:var(--white)}
.contact-inner{border-top:1px solid var(--black);padding-top:18px;max-width:1200px}
.contact h2{font-size:clamp(3rem,10vw,9.5rem);letter-spacing:-.05em;margin:clamp(20px,3vw,36px) 0 clamp(36px,5vw,72px)}
.contact .red{color:var(--red)}
.contact-grid{display:grid;grid-template-columns:1fr;gap:24px;margin-bottom:48px}
.contact-item{border-top:1px solid var(--light);padding-top:14px;display:flex;flex-direction:column;gap:6px}
.contact-k{font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;color:var(--dim)}
.contact-v{font-weight:500;color:var(--red);font-size:clamp(1.4rem,3vw,2.2rem);text-decoration:none}
.btn{
  display:inline-flex;align-items:center;gap:14px;
  background:var(--black);color:var(--white);
  padding:20px 36px;font-weight:600;font-size:1.05rem;
  transition:background .3s,gap .3s;
}
.btn:hover{background:var(--red);gap:24px}
@media (max-width:860px){.contact-grid{grid-template-columns:1fr}}

/* ---------- Footer ---------- */
.footer{
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  padding:28px var(--gutter);background:var(--black);color:var(--mid);font-size:.8rem;
}
.footer img{height:28px;width:auto}
.footer-tag{letter-spacing:.24em;text-transform:uppercase;color:var(--red);font-size:.7rem;font-weight:500}

/* ---------- Reveal khi cuộn ---------- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .8s var(--ease),transform .8s var(--ease);transition-delay:calc(var(--d,0) * .1s)}
.reveal.in{opacity:1;transform:none}

/* ---------- Giảm chuyển động ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal,.hero-meta,.hero-foot,.hero-tag .t,.hero-slash{opacity:1;transform:none}
  .hero-slash{transform:skewX(-18deg)}
}