:root{
  --text:#f3f4f6;
  --muted:#d1d5db;
  --brand:#60a5fa;
  --brand-d:#3b82f6;
  --content-w:800px;
  --section-bg:#111827;
  --divider:#374151;

  --gap:1cm; /* master spacing control */
}

*{box-sizing:border-box}

body{
  margin:0;
  font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;
  color:var(--text);
  line-height:1.6;
  background:url("../img/meandjono.webp") center center / cover no-repeat fixed;
}
body::before{
  content:"";
  position:fixed; inset:0;
  background:rgba(0,0,0,0.72);
  pointer-events:none;
  z-index:-1;
}

/* Headings */
h1,h2{line-height:1.2;margin:0 0 calc(var(--gap)/3)}
h1{font-weight:800;font-size:clamp(28px,4vw,44px);color:var(--text);text-align:center}
h2{font-weight:800;font-size:clamp(22px,3vw,32px);color:var(--text);text-align:center}

/* Links */
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}

/* Top banner */
.top-banner{
  background:transparent;
  border:none;
  text-align:center;
  padding-block:calc(var(--gap)/2);
  margin-block:var(--gap);
}
.top-banner h1{margin:0; line-height:1.05}

/* Hero & image break */
.hero{
  height:90vh;
  background:url("../img/hero.webp") center center / cover no-repeat;
  margin-block:var(--gap);
}
.image-break{
  height:70vh;
  background:url("../img/performing.webp") center center / cover no-repeat;
  margin-block:var(--gap);
}

/* Sections */
.section-content{
  margin-block:var(--gap);
  max-width:var(--content-w);
  margin-inline:auto;
  text-align:center;
}
.section-content > *{margin:0}
.section-content > * + *{margin-top:calc(var(--gap)/2)}
.section-content p{color:var(--muted);font-size:1.05rem}

/* Accordion (Teaching Info) */
.accordion{
  margin-top:calc(var(--gap)/3);
  text-align:left;
  max-width:600px;       /* limit width */
  margin-inline:auto;    /* center horizontally */
}

/* Accordion item containers */
.acc-item {
  background:#1f2937;
  border:1px solid var(--divider);
  border-radius:10px;
  overflow:hidden;
  margin-top:calc(var(--gap)/3);
  transition:transform 0.15s ease, box-shadow 0.15s ease;
}
.acc-item:hover {
  transform:translateY(-2px);
  box-shadow:0 6px 16px rgba(0,0,0,0.25);
}

/* Accordion trigger button */
.acc-trigger {
  width:100%;
  text-align:left;
  padding:14px 18px;
  background:linear-gradient(145deg,#1f2937,#2a3545);
  border:0;
  font-weight:600;
  font-size:1.05rem;
  color:var(--text);
  display:flex;
  justify-content:space-between;
  align-items:center;
  cursor:pointer;
  transition:background 0.2s ease, color 0.2s ease;
}
.acc-trigger:hover {
  background:linear-gradient(145deg,#2a3545,#1f2937);
  color:var(--brand);
}
.acc-trigger:focus {
  outline:2px solid var(--brand-d);
  outline-offset:2px;
}
.acc-trigger .chev {
  transition:transform 0.18s ease;
  font-size:1.2rem;
  color:var(--muted);
}

/* Accordion expanded state */
.acc-trigger[aria-expanded="true"] {
  background:linear-gradient(145deg,#3b82f6,#2563eb);
  color:#fff;
}
.acc-trigger[aria-expanded="true"] .chev {
  color:#fff;
}

/* Accordion panels */
.acc-panel {
  max-height:0;
  overflow:hidden;
  transition:max-height 0.22s ease, padding 0.2s ease;
  border-top:1px solid var(--divider);
  padding:0 18px;
}
.acc-panel p {
  margin:calc(var(--gap)/3) 0;
  color:var(--muted);
}

/* Contact + Socials */
.contact,.socials{
  margin-block:var(--gap);
  text-align:center;
}
.social-row{
  list-style:none;
  padding:0;
  margin:calc(var(--gap)/3) 0 0;
  display:flex;
  justify-content:center;
  gap:calc(var(--gap)/3);
  flex-wrap:wrap;
}
.social-row li{font-size:1.05rem}

/* Buttons */
button{
  padding:12px 16px;
  border:none;
  border-radius:8px;
  background:var(--brand);
  color:#0b1220;
  font-weight:700;
  cursor:pointer;
  transition:background .2s ease;
}
button:hover{background:var(--brand-d)}

/* Responsive */
@media (max-width:720px){
  .hero{min-height:44vh}
  .image-break{min-height:28vh}
}