:root{
  /* Netherlands flag palette (elegan, tetap “Belanda”) */
  --nl-red:  #AE1C28;
  --nl-blue: #21468B;
  --nl-white:#ffffff;

  /* Base UI */
  --bg:#ffffff;
  --surface:#ffffff;
  --text:#121417;
  --muted:#5a6472;
  --border:#e7ebf2;

  /* Accent system */
  --accent: var(--nl-red);
  --accent-2: var(--nl-blue);

  /* Layout */
  --container: 1080px;
  --radius: 18px;
  --radius-sm: 12px;

  /* Spacing scale (responsive friendly) */
  --space-1: 6px;
  --space-2: 10px;
  --space-3: 14px;
  --space-4: 18px;
  --space-5: 24px;
  --space-6: 34px;

  /* Shadow */
  --shadow: 0 10px 30px rgba(17,20,26,.08);
  --shadow-sm: 0 8px 22px rgba(17,20,26,.06);
  --shadow-md: 0 16px 34px rgba(17,20,26,.10);

  /* Typography scale */
  --font-sans: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Noto Sans", "Liberation Sans", sans-serif;
  --font-serif: Georgia, "Times New Roman", Times, serif;

  --h1: clamp(38px, 5vw, 64px);
  --h2: clamp(22px, 2.3vw, 34px);
  --body: 16.5px;
  --leading: 1.68;

  /* Mobile container padding */
  --gutter: 40px;

  /* Breakpoint: agar menu tidak pecah di layar “tanggung” */
  --nav-break: 980px;
}

/* Dark Theme Variables */
[data-theme="dark"] {
  --bg: #0d1117;
  --surface: #161b22;
  --text: #c9d1d9;
  --muted: #8b949e;
  --border: #30363d;

  --shadow: 0 10px 30px rgba(0,0,0,0.5);
  --shadow-sm: 0 8px 22px rgba(0,0,0,0.3);
  --shadow-md: 0 16px 34px rgba(0,0,0,0.6);

  /* Sedikit penyesuaian warna aksen agar kontras di background gelap */
  --nl-blue: #58a6ff;
  --nl-red: #ff7b72;
}

*{box-sizing:border-box}
html,body{height:100%}

html{ scroll-behavior: smooth; }

body{
  margin:0;
  font-family: var(--font-sans);
  background:var(--bg);
  color:var(--text);
  font-size: var(--body);
  line-height: var(--leading);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Subtle NL ambience */
body::before{
  content:"";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  background:
    linear-gradient(180deg,
      color-mix(in srgb, var(--nl-red) 9%, transparent) 0%,
      transparent 20%,
      transparent 78%,
      color-mix(in srgb, var(--nl-blue) 9%, transparent) 100%);
}

/* Media defaults */
img, svg, video{ max-width: 100%; height: auto; display: block; }
svg{ flex: 0 0 auto; }
button, input, textarea{ font: inherit; }

/* Links */
a{color:var(--accent); text-decoration:none}
a:hover{color: color-mix(in srgb, var(--accent) 86%, black); text-decoration:underline}

/* Container */
.container{
  width: min(var(--container), calc(100% - var(--gutter)));
  margin: 0 auto;
}

/* =======================
   Topbar / Navigation
   ======================= */
.topbar{
  position: sticky;
  top: 0;
  background: rgba(255,255,255,.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  z-index: 50;
}

.topbar-inner{
  /* Desktop: 3 kolom rapi (social | brand | nav) */
  display:grid;
  grid-template-columns: auto 1fr auto;
  align-items:center;
  gap: 14px;
  padding: 14px 0;
}

/* Social */
.social{
  display:flex;
  align-items:center;
  gap: 10px;
  flex: 0 0 auto;
}

/* Icon badges */
.icon-btn{
  width: 38px; height: 38px;
  display:inline-flex;
  align-items:center; justify-content:center;
  border-radius: 14px;
  color:#111;
  background:#fff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease, color .15s ease, border-color .15s ease;
}
.icon-btn:hover{
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  text-decoration:none;
}
.icon-btn svg{ width: 18px; height: 18px; }

.icon-btn.mail:hover{
  background: color-mix(in srgb, var(--nl-red) 10%, white);
  border-color: color-mix(in srgb, var(--nl-red) 22%, var(--border));
  color: var(--nl-red);
}
.icon-btn.scholar:hover{
  background: color-mix(in srgb, var(--nl-blue) 10%, white);
  border-color: color-mix(in srgb, var(--nl-blue) 22%, var(--border));
  color: var(--nl-blue);
}
.icon-btn.linkedin:hover{
  background: linear-gradient(90deg,
    color-mix(in srgb, var(--nl-red) 8%, white),
    color-mix(in srgb, var(--nl-blue) 8%, white));
  border-color: color-mix(in srgb, var(--nl-blue) 18%, var(--border));
}

/* ===== Brand / Logo (text logo) ===== */
.brand{
  display:flex;
  align-items:center;
  justify-content:center;
  gap: 12px;
  min-width: 0;
}
.brand a{
  display:inline-flex;
  align-items:center;
  gap: 10px;
  text-decoration:none;
  color:#111;
  min-width: 0;
}
.brand-mark{
  width: 30px;
  height: 30px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background:
    linear-gradient(135deg,
      color-mix(in srgb, var(--nl-red) 16%, white),
      color-mix(in srgb, var(--nl-blue) 16%, white));
  box-shadow: 0 10px 22px rgba(17,20,26,.08);
  position: relative;
  flex: 0 0 auto;
}
.brand-mark::after{
  content:"";
  position:absolute;
  inset: 7px;
  border-radius: 10px;
  background: linear-gradient(90deg, var(--nl-red), var(--nl-blue));
  opacity: .9;
}
.brand-text{
  display:flex;
  flex-direction:column;
  line-height: 1.05;
  min-width: 0;
}
.brand-name{
  font-family: var(--font-serif);
  font-weight: 900;
  letter-spacing: -0.02em;
  font-size: 18px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.brand-tag{
  font-size: 12.5px;
  color: var(--muted);
  font-weight: 750;
  letter-spacing: .2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.brand-dot{
  display:inline-block;
  width: 6px; height: 6px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--nl-red), var(--nl-blue));
  margin: 0 6px 1px;
}

/* Nav (desktop) */
.nav{
  display:flex;
  align-items:center;
  gap: 10px;
  flex-wrap: nowrap;            /* <- penting: jangan pecah jadi 2 baris */
  justify-content:flex-end;
}

.nav a{
  color:#111;
  font-size: 14px;
  padding: 8px 10px;
  border-radius: 12px;
  font-weight: 650;
  transition: background .15s ease, color .15s ease, border-color .15s ease;
  white-space: nowrap;
}
.nav a:hover{
  background:#f6f8fc;
  text-decoration:none;
  color:#111;
}
.nav a.active,
.nav a[aria-current="page"]{
  color: var(--nl-red);
  background: color-mix(in srgb, var(--nl-red) 10%, white);
  border: 1px solid color-mix(in srgb, var(--nl-red) 18%, var(--border));
}

/* =======================
   Mobile nav: hamburger + panel
   (Requires HTML: .nav-toggle + .nav-panel)
   ======================= */
.nav-toggle{
  display:none;
  align-items:center;
  justify-content:center;
  gap: 10px;
  height: 40px;
  padding: 0 12px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background:#fff;
  color:#111;
  box-shadow: var(--shadow-sm);
  font-weight: 850;
  cursor: pointer;
  user-select:none;
}
.nav-toggle:hover{ filter: brightness(.985); }

.nav-toggle .bars{
  width: 18px;
  height: 12px;
  position: relative;
  display:inline-block;
}
.nav-toggle .bars::before,
.nav-toggle .bars::after,
.nav-toggle .bars span{
  content:"";
  position:absolute;
  left:0;
  right:0;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
  transition: transform .18s ease, top .18s ease, opacity .18s ease;
}
.nav-toggle .bars::before{ top:0; }
.nav-toggle .bars span{ top:5px; }
.nav-toggle .bars::after{ top:10px; }

.nav-panel{
  display:none;               /* shown when .topbar.is-open */
  grid-column: 1 / -1;
  width: 100%;
  border-top: 1px solid var(--border);
  margin-top: 10px;
  padding-top: 12px;
}

.nav-panel .nav{
  width: 100%;
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  justify-content: start;
}

.nav-panel .nav a{
  border: 1px solid var(--border);
  background: #fff;
  box-shadow: 0 8px 20px rgba(17,20,26,.04);
  padding: 11px 12px;
  border-radius: 14px;
  text-align: left;
}
.nav-panel .nav a:hover{
  background:#f6f8fc;
  text-decoration:none;
}

/* Open state */
.topbar.is-open .nav-panel{ display:block; }

/* Animate hamburger -> X */
.topbar.is-open .nav-toggle .bars::before{ top:5px; transform: rotate(45deg); }
.topbar.is-open .nav-toggle .bars span{ opacity:0; }
.topbar.is-open .nav-toggle .bars::after{ top:5px; transform: rotate(-45deg); }

/* =======================
   Main / Layout
   ======================= */
main{ padding: 34px 0 60px; }

.hero{
  display:grid;
  grid-template-columns: 1.5fr .9fr;
  gap: 34px;
  align-items:start;
  margin-top: 10px;
}

/* Typography */
h1,h2,h3{
  font-family: var(--font-serif);
  letter-spacing: -0.02em;
  margin: 0 0 10px;
}
h1{ font-size: var(--h1); line-height: 1.04; }
h2{ font-size: var(--h2); line-height: 1.12; }
h3{ font-size: 18px; line-height: 1.2; letter-spacing: -0.01em; }

.subtitle{
  color: var(--muted);
  margin: 6px 0 14px;
  font-size: 15px;
}

.lead{
  color:#222;
  font-size: 16px;
  margin: 0 0 12px;
  max-width: 72ch;
}

/* Cards */
.card{
  border:1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  background:#fff;
}
.card:hover{
  box-shadow: var(--shadow-md);
  transition: box-shadow .2s ease;
}

.profile-card{ padding: 14px; }
.profile-img{
  width:100%;
  height:auto;
  border-radius: calc(var(--radius) - 6px);
  display:block;
}

/* Sections */
.section{ margin-top: 34px; }
.section h2{
  font-size: clamp(28px, 2.8vw, 40px);
  margin-bottom: 12px;
}

/* Lists */
.list{ margin:0; padding-left:18px; }
.list li{ margin: 6px 0; }

/* Quicklinks */
.quicklinks{
  display:flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}
.pill{
  border:1px solid var(--border);
  padding: 9px 12px;
  border-radius: 999px;
  color:#111;
  background:#fff;
  font-size: 14px;
  box-shadow: 0 8px 20px rgba(17,20,26,.04);
  transition: transform .12s ease, border-color .15s ease, background .15s ease;
  white-space: nowrap;
}
.pill:hover{
  transform: translateY(-1px);
  border-color: color-mix(in srgb, var(--nl-blue) 20%, var(--border));
  background: color-mix(in srgb, var(--nl-blue) 5%, white);
  text-decoration:none;
}

/* News */
.news{
  display:flex;
  flex-direction:column;
  gap: 12px;
  margin-top: 10px;
}
.news-item{
  display:grid;
  grid-template-columns: 112px 1fr;
  gap: 14px;
  align-items:start;
}
.badge{
  background: linear-gradient(90deg, var(--nl-red), var(--nl-blue));
  color:#fff;
  font-weight: 800;
  font-size: 11px;
  letter-spacing: .45px;
  padding: 8px 10px;
  border-radius: 10px;
  text-align:center;
  line-height: 1.15;
  box-shadow: 0 10px 22px rgba(17,20,26,.10);
  width: fit-content;
}
.news-item p{
  margin: 0;
  color:#222;
  font-size: 14.5px;
  line-height: 1.65;
}
.kicker{
  color: var(--muted);
  font-size: 13.5px;
  margin: 0 0 10px;
}

/* Doc grid */
.doc-grid{
  display:grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 12px;
  margin-top: 12px;
}
.doc{
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 14px 14px;
  background:#fff;
  box-shadow: 0 10px 22px rgba(17,20,26,.05);
  transition: transform .12s ease, box-shadow .15s ease, border-color .15s ease;
}
.doc:hover{
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  border-color: color-mix(in srgb, var(--nl-red) 14%, var(--border));
}
.doc-title{
  font-weight: 800;
  color:#111;
  margin: 0 0 6px;
}
.doc-meta{
  margin: 0;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.5;
}
.doc a{
  display:inline-block;
  margin-top: 10px;
  font-weight: 800;
  color: var(--nl-red);
}
.doc a:hover{ color: color-mix(in srgb, var(--nl-red) 85%, black); }

/* Footer */
.footer{
  border-top: 1px solid var(--border);
  padding: 18px 0;
  color:#6b7280;
  font-size: 13px;
  background:#fff;
}
.footer .container{
  position: relative;
}
.footer .container::before{
  content:"";
  display:block;
  height: 3px;
  margin-bottom: 10px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--nl-red), var(--nl-white), var(--nl-blue));
}

/* Forms */
.form{
  display:grid;
  gap: 12px;
  max-width: 640px;
  margin-top: 10px;
}
.input, .textarea{
  width:100%;
  border:1px solid var(--border);
  border-radius: 14px;
  padding: 12px 12px;
  background:#fff;
  outline: none;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.input:focus, .textarea:focus{
  border-color: color-mix(in srgb, var(--nl-blue) 35%, var(--border));
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--nl-blue) 12%, transparent);
}
.textarea{ min-height: 140px; resize: vertical; }

/* Buttons */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border:1px solid var(--border);
  background:#fff;
  color:#111;
  border-radius: 14px;
  padding: 10px 14px;
  font-weight: 800;
  cursor:pointer;
  transition: transform .12s ease, filter .15s ease, background .15s ease, border-color .15s ease;
  white-space: nowrap;
}
.btn:hover{ filter:brightness(.98); transform: translateY(-1px); }

.btn.primary{
  border-color: color-mix(in srgb, var(--nl-red) 30%, var(--border));
  background: color-mix(in srgb, var(--nl-red) 7%, white);
  color: var(--nl-red);
}
.btn.primary:hover{ background: color-mix(in srgb, var(--nl-red) 12%, white); }

.btn.secondary{
  border-color: color-mix(in srgb, var(--nl-blue) 30%, var(--border));
  background: color-mix(in srgb, var(--nl-blue) 7%, white);
  color: var(--nl-blue);
}
.btn.secondary:hover{ background: color-mix(in srgb, var(--nl-blue) 12%, white); }

.btn.solid{
  border-color: var(--nl-red);
  background: var(--nl-red);
  color:#fff;
}
.btn.solid:hover{ filter:brightness(.95); }

.small{ font-size: 13px; color: var(--muted); }

/* =======================
   Back to top button
   (Requires HTML: #backToTop)
   ======================= */
.back-to-top{
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 60;

  width: 44px;
  height: 44px;
  border-radius: 16px;

  display:inline-flex;
  align-items:center;
  justify-content:center;

  border: 1px solid var(--border);
  background:#fff;
  color:#111;
  box-shadow: var(--shadow-md);

  cursor: pointer;
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition: opacity .18s ease, transform .18s ease, filter .15s ease;
}
.back-to-top:hover{ filter: brightness(.985); }
.back-to-top.show{
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* =======================
   Responsive Enhancements
   ======================= */

/* Large tablets / small laptops */
@media (max-width: 1024px){
  :root{ --gutter: 32px; }
  .hero{ gap: 22px; }
  main{ padding: 28px 0 54px; }

  /* nav font sedikit diperkecil agar tidak “nyenggol” */
  .nav a{ font-size: 13.5px; padding: 8px 9px; }
}

/* Switch to hamburger earlier (biar tidak pecah seperti screenshot) */
@media (max-width: 980px){
  :root{ --gutter: 28px; }

  .hero{ grid-template-columns: 1fr; }

  /* topbar jadi 2 baris rapi: row1 (social + toggle), row2 (brand), row3 (panel) */
  .topbar-inner{
    grid-template-columns: 1fr auto;
    gap: 12px;
  }
  .social{ grid-column: 1 / 2; }
  .nav-toggle{ display:inline-flex; grid-column: 2 / 3; justify-self: end; }

  .brand{
    grid-column: 1 / -1;
    justify-content:flex-start;
  }

  /* Hide desktop nav */
  .topbar > .container .nav{ display:none; }

  /* nav panel visible when open */
  .nav-panel{ display:none; }
  .topbar.is-open .nav-panel{ display:block; }

  .doc-grid{ grid-template-columns: 1fr; }
  .news-item{ grid-template-columns: 104px 1fr; }
}

/* Phones */
@media (max-width: 600px){
  :root{
    --gutter: 22px;
    --body: 16px;
  }

  .topbar-inner{ padding: 12px 0; }

  .icon-btn{ width: 36px; height: 36px; border-radius: 13px; }
  .brand-mark{ width: 28px; height: 28px; border-radius: 12px; }
  .brand-name{ font-size: 16.5px; }
  .brand-tag{ font-size: 12px; }

  h1{ font-size: clamp(34px, 9vw, 46px); }
  .subtitle{ font-size: 14px; }
  .lead{ font-size: 15.5px; }

  main{ padding: 22px 0 48px; }
  .section{ margin-top: 26px; }

  .quicklinks{ gap: 8px; }
  .pill{ padding: 9px 11px; font-size: 13.5px; }

  .news-item{ grid-template-columns: 1fr; gap: 10px; }

  .btn{ padding: 10px 12px; }

  .nav-panel .nav{ grid-template-columns: 1fr; }
}

/* Very small phones */
@media (max-width: 360px){
  :root{ --gutter: 16px; }
  .pill{ width: 100%; text-align: center; }
  .btn{ width: 100%; }
}

/* Print-friendly */
@media print{
  .topbar, .footer, .back-to-top{ display:none !important; }
  body::before{ display:none !important; }
  a{ color: #111 !important; text-decoration: none !important; }
  .card, .doc, .section, .badge{ box-shadow: none !important; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto !important; }
  *{ scroll-behavior: auto !important; }
  .icon-btn, .pill, .doc, .btn{ transition: none !important; }
}