/* ==========================================================================
   Modern Academic Elegance — base: tokens, reset, tipografi, layout, form
   ========================================================================== */
@font-face { font-family: "Playfair Display"; src: url("../fonts/playfair.woff2") format("woff2"); font-weight: 400 800; font-style: normal; font-display: swap; }
@font-face { font-family: "Playfair Display"; src: url("../fonts/playfair-italic.woff2") format("woff2"); font-weight: 400 800; font-style: italic; font-display: swap; }
@font-face { font-family: "Plus Jakarta Sans"; src: url("../fonts/jakarta.woff2") format("woff2"); font-weight: 400 700; font-style: normal; font-display: swap; }

:root {
  --burgundy: #542B3A;
  --rose: #C796A5;
  --gold: #C5A676;
  --ivory: #FAF8F5;
  --charcoal: #29282D;
  --warm-gray: #817C80;

  --bg: var(--ivory);
  --surface: #FFFFFF;
  --surface-2: #F4EFEA;
  --text: var(--charcoal);
  --muted: #6B666A;               /* kontras >= 4.5:1 di atas --bg */
  --primary: var(--burgundy);
  --on-primary: #FFFFFF;
  --primary-soft: #F1E4E8;
  --accent: #8A6B33;              /* emas gelap untuk teks; --gold untuk dekorasi */
  --link: var(--burgundy);
  --border: #E6DFD8;
  --border-strong: #D3C9C0;
  --focus: #8A3F5C;
  --ok: #2F6B4F; --warn: #8A5A12; --bad: #A12E3F;
  --ok-bg: #E6F2EB; --warn-bg: #FBF0DC; --bad-bg: #F9E4E7; --muted-bg: #EFEBE7;

  --shadow-sm: 0 1px 2px rgba(41, 40, 45, .05), 0 1px 1px rgba(41, 40, 45, .03);
  --shadow: 0 8px 24px -10px rgba(84, 43, 58, .18), 0 2px 6px rgba(41, 40, 45, .05);
  --shadow-lg: 0 30px 60px -28px rgba(84, 43, 58, .35), 0 8px 20px -8px rgba(41, 40, 45, .08);

  --r-sm: 12px; --r: 16px; --r-lg: 20px; --r-pill: 999px;
  --font-head: "Playfair Display", "Iowan Old Style", Georgia, "Times New Roman", serif;
  --font-body: "Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --container: 1200px;
  --gutter: clamp(1.1rem, 4vw, 2rem);
  --header-h: 72px;
  --ease: cubic-bezier(.22, .61, .36, 1);
  color-scheme: light;
}

:root[data-theme="dark"] {
  --bg: #17121A;
  --surface: #211A25;
  --surface-2: #2A2230;
  --text: #EEE8EB;
  --muted: #B3A9B0;
  --primary: #D7A9B7;
  --on-primary: #2A1520;
  --primary-soft: #35242D;
  --accent: #D4B684;
  --link: #E1B9C6;
  --border: #382E3D;
  --border-strong: #4A3E50;
  --focus: #E8B9C8;
  --ok: #7BC4A0; --warn: #E0B565; --bad: #F08B9A;
  --ok-bg: #1D3329; --warn-bg: #3A2D14; --bad-bg: #3F1D25; --muted-bg: #2D2531;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);
  --shadow: 0 10px 30px -12px rgba(0, 0, 0, .6);
  --shadow-lg: 0 30px 60px -28px rgba(0, 0, 0, .7);
  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #17121A; --surface: #211A25; --surface-2: #2A2230; --text: #EEE8EB; --muted: #B3A9B0;
    --primary: #D7A9B7; --on-primary: #2A1520; --primary-soft: #35242D; --accent: #D4B684; --link: #E1B9C6;
    --border: #382E3D; --border-strong: #4A3E50; --focus: #E8B9C8;
    --ok: #7BC4A0; --warn: #E0B565; --bad: #F08B9A; --ok-bg: #1D3329; --warn-bg: #3A2D14; --bad-bg: #3F1D25; --muted-bg: #2D2531;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, .4); --shadow: 0 10px 30px -12px rgba(0, 0, 0, .6); --shadow-lg: 0 30px 60px -28px rgba(0, 0, 0, .7);
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 16px); }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: var(--font-body); font-size: 1rem; line-height: 1.7;
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
  transition: background-color .3s var(--ease), color .3s var(--ease);
}
img, svg, video { max-width: 100%; display: block; }
img { height: auto; }
a { color: var(--link); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
ul, ol { padding-left: 1.25rem; }
hr { border: 0; border-top: 1px solid var(--border); margin: 2rem 0; }
::selection { background: var(--rose); color: var(--burgundy); }

:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; border-radius: 6px; }
.skip-link { position: absolute; left: 1rem; top: -100px; background: var(--primary); color: var(--on-primary); padding: .6rem 1rem; border-radius: var(--r-sm); z-index: 200; }
.skip-link:focus { top: 1rem; }
.sr-only { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }

h1, h2, h3, h4 { font-family: var(--font-head); font-weight: 600; line-height: 1.18; letter-spacing: -.01em; margin: 0 0 .6em; color: var(--text); text-wrap: balance; }
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); }
h2 { font-size: clamp(1.7rem, 3.2vw, 2.4rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }
h4 { font-size: 1.1rem; }
p { margin: 0 0 1em; }
.lead { font-size: clamp(1.05rem, 1.6vw, 1.2rem); color: var(--muted); line-height: 1.75; }
.muted { color: var(--muted); }
.small { font-size: .875rem; }
.eyebrow { display: inline-flex; align-items: center; gap: .6rem; font-size: .76rem; font-weight: 600; letter-spacing: .16em; text-transform: uppercase; color: var(--accent); margin-bottom: 1rem; }
.eyebrow::before { content: ""; width: 28px; height: 1px; background: currentColor; }
.serif-italic { font-family: var(--font-head); font-style: italic; font-weight: 500; }

.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }
.container--narrow { max-width: 780px; }
.section { padding-block: clamp(3.5rem, 8vw, 6.5rem); }
.section--tint { background: var(--surface-2); }
.section--tight { padding-block: clamp(2.5rem, 5vw, 4rem); }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 1.5rem; margin-bottom: clamp(1.75rem, 4vw, 3rem); flex-wrap: wrap; }
.section-head h2 { margin: 0; max-width: 22ch; }
.section-head p { margin: .6rem 0 0; color: var(--muted); max-width: 52ch; }

.grid { display: grid; gap: 1.5rem; }
.grid--3 { grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr)); }
.grid--2 { grid-template-columns: repeat(auto-fill, minmax(min(100%, 420px), 1fr)); }
.stack > * + * { margin-top: 1rem; }
.cluster { display: flex; flex-wrap: wrap; gap: .75rem; align-items: center; }

/* ---------- Tombol ---------- */
.btn {
  --btn-bg: var(--primary); --btn-fg: var(--on-primary); --btn-bd: var(--primary);
  display: inline-flex; align-items: center; justify-content: center; gap: .55rem;
  padding: .8rem 1.5rem; min-height: 46px; border-radius: var(--r-pill);
  background: var(--btn-bg); color: var(--btn-fg); border: 1px solid var(--btn-bd);
  font-weight: 600; font-size: .95rem; text-decoration: none; line-height: 1.2; cursor: pointer;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), background-color .25s, color .25s, border-color .25s;
}
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow); text-decoration: none; }
.btn:active { transform: translateY(0); }
.btn .icon { transition: transform .25s var(--ease); }
.btn:hover .icon-arrow-right { transform: translateX(3px); }
.btn--ghost { --btn-bg: transparent; --btn-fg: var(--text); --btn-bd: var(--border-strong); }
.btn--ghost:hover { --btn-bd: var(--primary); background: var(--primary-soft); }
.btn--gold { --btn-bg: var(--gold); --btn-fg: #2A1D0A; --btn-bd: var(--gold); }
.btn--danger { --btn-bg: var(--bad); --btn-fg: #fff; --btn-bd: var(--bad); }
.btn--sm { padding: .5rem 1rem; min-height: 38px; font-size: .85rem; }
.btn--block { width: 100%; }
.btn[disabled] { opacity: .55; pointer-events: none; }
.link-arrow { display: inline-flex; align-items: center; gap: .4rem; font-weight: 600; text-decoration: none; color: var(--link); }
.link-arrow:hover .icon { transform: translateX(4px); }
.link-arrow .icon { transition: transform .25s var(--ease); }
.icon-btn { display: inline-grid; place-items: center; width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--border); background: transparent; color: var(--text); transition: background-color .2s, border-color .2s; }
.icon-btn:hover { background: var(--primary-soft); border-color: var(--border-strong); }

/* ---------- Form ---------- */
.field { display: grid; gap: .4rem; margin-bottom: 1.1rem; }
.field > label, .label { font-size: .85rem; font-weight: 600; }
.field .hint { font-size: .8rem; color: var(--muted); }
.field .error-text { font-size: .82rem; color: var(--bad); font-weight: 500; }
.input, .select, .textarea {
  width: 100%; padding: .75rem 1rem; min-height: 46px; border-radius: var(--r-sm);
  background: var(--surface); border: 1px solid var(--border-strong); color: var(--text);
  transition: border-color .2s, box-shadow .2s;
}
.textarea { min-height: 130px; resize: vertical; line-height: 1.6; }
.input:hover, .select:hover, .textarea:hover { border-color: var(--rose); }
.input:focus, .select:focus, .textarea:focus { outline: none; border-color: var(--focus); box-shadow: 0 0 0 3px color-mix(in srgb, var(--focus) 28%, transparent); }
.input[aria-invalid="true"] { border-color: var(--bad); }
.select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23817C80' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right .85rem center; padding-right: 2.4rem; }
.check { display: inline-flex; align-items: center; gap: .6rem; cursor: pointer; font-size: .92rem; }
.check input { width: 18px; height: 18px; accent-color: var(--primary); }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

/* ---------- Alert ---------- */
.alert { padding: .9rem 1.1rem; border-radius: var(--r-sm); border: 1px solid; font-size: .92rem; margin-bottom: 1.25rem; }
.alert--success { background: var(--ok-bg); border-color: var(--ok); color: var(--ok); }
.alert--error { background: var(--bad-bg); border-color: var(--bad); color: var(--bad); }
.alert--info { background: var(--primary-soft); border-color: var(--rose); color: var(--text); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1 !important; transform: none !important; }
}