/* ============================================================
   PT BETRACOM GEMILANG NUSA — design tokens
   Tema: hero fotografis full-bleed, overlay gelap, aksen emas tipis
   Type: Space Grotesk (display) / Plus Jakarta Sans (body) / IBM Plex Mono (data)
   ============================================================ */

:root{
  --ink:        #0A1A30;   /* deep navy-black — overlay & panel gelap */
  --ink-soft:   #14294A;
  --ink-line:   rgba(255,255,255,0.14);

  --paper:      #FAF8F3;   /* warm off-white — background utama */
  --paper-2:    #FFFFFF;

  --gold:       #C9A961;   /* aksen emas — sertifikasi & garis pemisah */
  --gold-soft:  #E7D9B2;
  --rust:       #9C3F2A;   /* aksen hangat, dipakai terbatas di CTA */
  --rust-dark:  #7E3220;

  --text:       #1C232C;
  --text-soft:  #59626D;
  --text-inv:   #F6F4EC;
  --text-inv-soft: rgba(246,244,236,0.74);

  --line:       #E5E0D2;

  --font-display: 'Space Grotesk', sans-serif;
  --font-body:    'Plus Jakarta Sans', sans-serif;
  --font-mono:    'IBM Plex Mono', monospace;

  --radius: 4px;
  --wrap: 1180px;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--text);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
ul,dl{ margin:0; padding:0; list-style:none; }
h1,h2,h3{ font-family:var(--font-display); margin:0; line-height:1.12; letter-spacing:-0.01em; }
p{ margin:0; }

.wrap{
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:28px;
}

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *{ animation-duration:0.001ms !important; transition-duration:0.001ms !important; }
}

a:focus-visible, button:focus-visible{
  outline:2px solid var(--gold);
  outline-offset:3px;
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 26px;
  font-family:var(--font-display);
  font-weight:600;
  font-size:0.92rem;
  letter-spacing:0.01em;
  border-radius:var(--radius);
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .18s ease, background-color .18s ease, border-color .18s ease, color .18s ease;
}
.btn:hover{ transform:translateY(-2px); }

.btn-primary{ background:var(--rust); color:var(--text-inv); }
.btn-primary:hover{ background:var(--rust-dark); }

.btn-outline{ border-color:rgba(246,244,236,0.55); color:var(--text-inv); }
.btn-outline:hover{ border-color:var(--text-inv); background:rgba(246,244,236,0.1); }

.btn-outline-dark{ border-color:var(--ink); color:var(--ink); }
.btn-outline-dark:hover{ background:var(--ink); color:var(--text-inv); }

.btn-ghost{
  border-color:var(--ink-line);
  color:var(--text-inv);
  padding:10px 20px;
  font-size:0.86rem;
}
.btn-ghost:hover{ background:rgba(246,244,236,0.1); }

.eyebrow{
  font-family:var(--font-mono);
  font-size:0.74rem;
  letter-spacing:0.16em;
  text-transform:uppercase;
  color:var(--gold-soft);
  margin:0 0 14px;
}
.eyebrow-dark{ color:var(--rust); }

.link-arrow{
  display:inline-block;
  margin-top:22px;
  font-family:var(--font-display);
  font-weight:600;
  font-size:0.94rem;
  color:var(--ink);
  border-bottom:1.5px solid var(--gold);
  padding-bottom:3px;
}



/* ============================================================
   HERO — foto full-bleed dengan overlay
   ============================================================ */
.hero{
  position:relative;
  min-height:94vh;
  display:flex;
  align-items:flex-end;
  overflow:hidden;
  color:var(--text-inv);
  padding-block:120px 135px;
}
.hero-media{
  position:absolute;
  inset:0;
  z-index:0;
}
.hero-media img{
  width:100%; height:100%;
  object-fit:cover;
  object-position:center;
}
.hero-overlay{
  position:absolute;
  inset:0;
  background:
    linear-gradient(180deg, rgba(10,20,36,0.55) 0%, rgba(10,20,36,0.35) 38%, rgba(8,16,28,0.88) 100%),
    linear-gradient(90deg, rgba(8,16,28,0.75) 0%, rgba(8,16,28,0.15) 55%);
}
.hero-inner{ position:relative; z-index:1; max-width:660px; }
.hero-title{
  font-size:clamp(2.3rem, 4.6vw, 3.6rem);
  font-weight:700;
  margin-bottom:22px;
  text-shadow:0 2px 24px rgba(0,0,0,0.25);
}
.hero-copy{
  font-size:1.05rem;
  line-height:1.65;
  color:var(--text-inv-soft);
  max-width:540px;
  margin-bottom:36px;
}
.hero-actions{ display:flex; gap:16px; flex-wrap:wrap; }

/* ============================================================
   FLOATING CERTIFICATION CARD — signature element
   ============================================================ */
.cert-card{
  position:relative;
  z-index:2;
  margin-top:-96px;
  margin-bottom:0;
  background:var(--paper-2);
  border-radius:18px;
  box-shadow:0 40px 70px -24px rgba(10,26,48,0.4), 0 1px 0 rgba(201,169,97,0.5) inset;
  padding:38px 44px;
  display:grid;
  grid-template-columns:auto 1fr auto;
  align-items:center;
  gap:36px;
}
.cert-card-mark{
  width:60px; height:60px;
  color:var(--gold);
  flex-shrink:0;
  display:flex; align-items:center; justify-content:center;
  border-radius:50%;
  background:linear-gradient(155deg, rgba(201,169,97,0.14), rgba(201,169,97,0.03));
}
.cert-card-mark svg{ width:34px; height:34px; }
.cert-card-text{
  font-size:0.98rem;
  color:var(--text);
  line-height:1.5;
  max-width:280px;
}
.cert-card-stats{
  display:grid;
  grid-template-columns:repeat(4, auto);
  gap:0;
}
.cert-card-stats div{
  padding-inline:24px;
  border-left:1px solid var(--line);
}
.cert-card-stats div:first-child{ border-left:none; padding-left:0; }
.cert-card-stats dt{
  font-family:var(--font-display);
  font-size:1.5rem;
  font-weight:700;
  color:var(--ink);
}
.cert-card-stats dd{
  margin:2px 0 0;
  font-size:0.74rem;
  color:var(--text-soft);
  white-space:nowrap;
}

/* ============================================================
   ABOUT
   ============================================================ */
.about{ padding-block:110px 100px; }
.about-inner{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:64px;
}
.about-copy h2{
  font-size:clamp(1.6rem, 2.6vw, 2.1rem);
  margin-bottom:20px;
  color:var(--ink);
}
.about-copy p{
  color:var(--text-soft);
  line-height:1.7;
  margin-bottom:16px;
  max-width:520px;
}

.fact-list{ display:flex; flex-direction:column; gap:26px; }
.fact-list li{
  display:flex;
  gap:20px;
  padding-bottom:26px;
  border-bottom:1px solid var(--line);
}
.fact-list li:last-child{ border-bottom:none; padding-bottom:0; }
.fact-num{
  font-family:var(--font-mono);
  font-size:0.78rem;
  color:var(--gold);
  border:1px solid var(--gold);
  border-radius:50%;
  width:35px; height:35px;
  flex-shrink:0;
  display:flex; align-items:center; justify-content:center;
}
.fact-list h3{ font-size:1rem; color:var(--ink); margin-bottom:6px; }
.fact-list p{ color:var(--text-soft); font-size:0.9rem; line-height:1.6; }

/* ============================================================
   PROGRAM
   ============================================================ */
.program{ padding-block:100px; background:var(--paper-2); border-top:1px solid var(--line); border-bottom:1px solid var(--line); }
.section-head{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:48px;
  align-items:end;
  margin-bottom:52px;
}
.section-head h2{ font-size:clamp(1.6rem, 2.6vw, 2.1rem); color:var(--ink); }
.section-desc{ color:var(--text-soft); line-height:1.7; }

.program-grid{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:22px;
}
.program-card{
  background:var(--paper-2);
  padding:34px 35px;
  border-radius:14px;
  border:1px solid var(--line);
  box-shadow:0 1px 2px rgba(20,25,33,0.04);
  transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.program-card:hover{
  transform:translateY(-4px);
  box-shadow:0 20px 40px -16px rgba(10,26,48,0.18);
  border-color:transparent;
}
.program-tag{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:0.68rem;
  letter-spacing:0.1em;
  text-transform:uppercase;
  color:var(--rust);
  border:1px solid var(--rust);
  border-radius:100px;
  padding:4px 10px;
  margin-bottom:16px;
}
.program-card h3{ font-size:1.12rem; margin-bottom:10px; color:var(--ink); }
.program-card p{ color:var(--text-soft); font-size:0.92rem; line-height:1.6; }

.program-more{ margin-top:44px; }

/* ============================================================
   ADVANTAGE
   ============================================================ */
.advantage{ background:var(--ink); color:var(--text-inv); padding-block:100px; }
.advantage-inner{ display:grid; grid-template-columns:0.8fr 1.2fr; gap:64px; }
.advantage-copy h2{ font-size:clamp(1.6rem, 2.6vw, 2.1rem); margin-bottom:18px; }
.advantage-copy p{ color:var(--text-inv-soft); line-height:1.7; max-width:420px; }

.advantage-list{ display:grid; grid-template-columns:1fr 1fr; gap:18px; }
.advantage-list li{
  display:flex;
  gap:20px;
  padding:26px;
  border:1px solid var(--ink-line);
  border-radius:14px;
  background:rgba(255,255,255,0.03);
  transition:background-color .2s ease, border-color .2s ease;
}
.advantage-list li:hover{ background:rgba(255,255,255,0.06); border-color:rgba(201,169,97,0.4); }
.advantage-num{
  font-family:var(--font-mono);
  font-size:0.78rem;
  color:var(--gold);
  flex-shrink:0;
  width:34px; height:34px;
  border-radius:50%;
  border:1px solid rgba(201,169,97,0.4);
  display:flex; align-items:center; justify-content:center;
}
.advantage-list h3{ font-size:1.02rem; margin-bottom:6px; color:var(--text-inv); }
.advantage-list p{ color:var(--text-inv-soft); font-size:0.9rem; line-height:1.6; }

/* ============================================================
   TESTIMONIAL
   ============================================================ */
.testimonial{ padding-block:90px; }
.testimonial-inner{ max-width:680px; text-align:center; margin-inline:auto; }
.quote-mark{ width:40px; height:35px; color:var(--gold); margin-inline:auto 22px; }
.testimonial-text{
  font-family:var(--font-display);
  font-size:1.4rem;
  font-weight:500;
  color:var(--ink);
  line-height:1.5;
  margin-bottom:22px;
}
.testimonial-name{ font-family:var(--font-mono); font-size:0.8rem; color:var(--text-soft); }

/* ============================================================
   CTA
   ============================================================ */
.cta{ background:var(--gold-soft); }
.cta-inner{
  display:grid;
  grid-template-columns:1.2fr 1fr;
  gap:56px;
  padding-block:90px;
  align-items:center;
}
.cta h2{ font-size:clamp(1.6rem, 2.6vw, 2.1rem); color:var(--ink); margin-bottom:18px; }
.cta .eyebrow{ color:var(--rust); }
.cta-copy{ color:var(--text-soft); line-height:1.7; max-width:440px; }

.cta-contact{ display:flex; flex-direction:column; gap:24px; align-items:flex-start; }
.cta-details{ display:flex; flex-direction:column; gap:8px; }
.cta-details p{ font-size:0.92rem; color:var(--text); display:flex; gap:10px; }
.cta-details span{
  font-family:var(--font-mono);
  font-size:0.68rem;
  letter-spacing:0.08em;
  text-transform:uppercase;
  color:var(--rust);
  width:64px;
  flex-shrink:0;
  padding-top:2px;
}



/* ============================================================
   SCROLL REVEAL (dikendalikan script.js)
   ============================================================ */
.reveal{ opacity:0; transform:translateY(18px); transition:opacity .6s ease, transform .6s ease; }
.reveal-in{ opacity:1; transform:translateY(0); }
.program-card.reveal{ transition-delay:.05s; }
.advantage-list li.reveal:nth-child(2){ transition-delay:.08s; }
.advantage-list li.reveal:nth-child(3){ transition-delay:.16s; }
.advantage-list li.reveal:nth-child(4){ transition-delay:.24s; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 980px){
  .about-inner{ grid-template-columns:1fr; }
  .section-head{ grid-template-columns:1fr; }
  .program-grid{ grid-template-columns:repeat(2,1fr); }
  .advantage-inner{ grid-template-columns:1fr; }
  .advantage-list{ grid-template-columns:1fr; }
  .cta-inner{ grid-template-columns:1fr; }
  .cta-contact{ align-items:flex-start; }
  .cert-card{ grid-template-columns:1fr; text-align:center; gap:24px; margin-top:-72px; }
  .cert-card-mark{ margin-inline:auto; }
  .cert-card-text{ max-width:none; }
  .cert-card-stats{ grid-template-columns:repeat(2, auto); justify-content:center; row-gap:22px; }
  .cert-card-stats div{ border-left:none !important; padding-inline:18px; }
  .footer-top{ grid-template-columns:1fr 1fr; }
  .footer-col-brand{ grid-column:1 / -1; }
}

@media (max-width: 760px){
  .main-nav{
    position:fixed;
    inset:64px 0 0 0;
    background:var(--ink);
    flex-direction:column;
    padding:32px 28px;
    gap:22px;
    transform:translateY(-8px);
    opacity:0;
    pointer-events:none;
    transition:opacity .2s ease, transform .2s ease;
  }
  body.nav-open .main-nav{ opacity:1; transform:translateY(0); pointer-events:auto; }
  .main-nav a{ font-size:1.05rem; }
  .header-cta{ display:none; }
  .nav-toggle{ display:flex; }
  body.nav-open .nav-toggle span:nth-child(1){ transform:translateY(7px) rotate(45deg); }
  body.nav-open .nav-toggle span:nth-child(2){ opacity:0; }
  body.nav-open .nav-toggle span:nth-child(3){ transform:translateY(-7px) rotate(-45deg); }

  .hero{ min-height:auto; padding-block:150px 90px; align-items:flex-end; }
  .cert-card{ margin-top:-56px; padding:28px 24px; }
  .program-grid{ grid-template-columns:1fr; }
  .footer-top{ grid-template-columns:1fr; gap:40px; padding-block:56px 36px; }
}