/* =========================================================
   EkoLimbah — Eco-Tech Glassmorphism
   Proyek PIPAS Kelompok 2 · Tema: Limbah dan Pengelolaannya
   ========================================================= */

/* ---------- 1. Variabel desain ---------- */
:root {
  --green-950: #0b261c;
  --green-900: #0f2e22;
  --green-800: #154233;
  --green-700: #1d5a45;
  --green-600: #2a7a5c;
  --sage-500: #8fae9a;
  --sage-300: #c3d6c9;
  --sage-100: #e8f0ea;
  --mint: #5fd3b0;
  --blue: #4aa3c7;

  --bg: #f6f8f5;
  --text: #1f2a26;
  --muted: #4a5a53;
  --surface: rgba(255, 255, 255, 0.68);
  --surface-2: rgba(255, 255, 255, 0.92);
  --border: rgba(21, 66, 51, 0.14);
  --accent: #1d6a50;
  --accent-bg: #dff1e8;
  --focus: #1a6fa8;

  --radius-sm: 16px;
  --radius: 22px;
  --radius-lg: 28px;
  --shadow-sm: 0 4px 14px rgba(15, 46, 34, 0.08);
  --shadow: 0 14px 40px rgba(15, 46, 34, 0.12);
  --gap: clamp(1rem, 2.4vw, 1.5rem);
  --ease: cubic-bezier(0.22, 0.8, 0.28, 1);
  --font: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Roboto, Arial, sans-serif;
}

/* Bagian gelap memakai variabel yang sama dengan nilai berbeda */
.section--dark {
  --text: #eef5f0;
  --muted: #bccfc4;
  --surface: rgba(255, 255, 255, 0.08);
  --surface-2: rgba(255, 255, 255, 0.14);
  --border: rgba(255, 255, 255, 0.18);
  --accent: #5fd3b0;
  --accent-bg: rgba(95, 211, 176, 0.18);
  --focus: #8ff0d2;
  --shadow-sm: 0 4px 14px rgba(0, 0, 0, 0.25);
  color: var(--text);
}

/* ---------- 2. Reset & dasar ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
body.no-scroll { overflow: hidden; }
img, svg { max-width: 100%; }
h1, h2, h3, h4 { margin: 0; line-height: 1.15; letter-spacing: -0.015em; }
p { margin: 0 0 0.9rem; }
ul, ol { margin: 0 0 0.9rem; padding-left: 1.25rem; }
a { color: var(--accent); }
button { font: inherit; color: inherit; cursor: pointer; }
[hidden] { display: none !important; }

:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 6px; }

.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: fixed; left: 1rem; top: -4rem; z-index: 100; background: var(--green-800); color: #fff; padding: 0.6rem 1rem; border-radius: 12px; transition: top 0.2s; }
.skip:focus { top: 1rem; }

.icon { width: 1.25em; height: 1.25em; flex: none; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

.container { width: min(1120px, 92%); margin-inline: auto; }
.container--narrow { width: min(880px, 92%); }

/* ---------- 3. Efek kaca (glass) ---------- */
.glass {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

/* ---------- 4. Progres & navbar ---------- */
.progress { position: fixed; inset: 0 0 auto 0; height: 3px; z-index: 70; }
.progress span { display: block; height: 100%; background: linear-gradient(90deg, var(--mint), var(--blue)); transform-origin: left; transform: scaleX(0); }

.nav { position: fixed; top: 12px; left: 0; right: 0; z-index: 60; pointer-events: none; }
.nav__inner {
  pointer-events: auto;
  position: relative;
  width: min(1120px, 94%);
  margin-inline: auto;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 0.5rem 0.6rem 0.5rem 0.9rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.74);
  border: 1px solid rgba(21, 66, 51, 0.12);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  backdrop-filter: blur(14px) saturate(1.2);
  color: #1f2a26;
  transition: box-shadow 0.25s;
}
.nav.is-scrolled .nav__inner { box-shadow: var(--shadow); }
.brand { display: flex; align-items: center; gap: 0.6rem; text-decoration: none; color: #154233; }
.brand__logo { width: 38px; height: 38px; border-radius: 12px; display: grid; place-items: center; background: linear-gradient(135deg, var(--green-800), var(--green-600)); color: var(--mint); }
.brand__name { display: flex; flex-direction: column; font-weight: 800; letter-spacing: -0.02em; line-height: 1.1; }
.brand__name small { font-size: 0.68rem; font-weight: 600; color: #4a5a53; letter-spacing: 0; }

.nav__menu { list-style: none; margin: 0; padding: 0; display: flex; gap: 0.2rem; }
.nav__menu a { display: block; padding: 0.5rem 0.9rem; border-radius: 999px; color: #2c3a34; text-decoration: none; font-weight: 600; font-size: 0.93rem; transition: background 0.2s, color 0.2s; }
.nav__menu a:hover { background: rgba(21, 66, 51, 0.09); }
.nav__menu a.is-active { background: var(--green-800); color: #fff; }
.nav__toggle { display: none; width: 44px; height: 44px; border-radius: 50%; border: 0; background: rgba(21, 66, 51, 0.08); color: #154233; place-items: center; }

/* ---------- 5. Tombol & chip ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  padding: 0.85rem 1.5rem; border-radius: 999px; border: 1px solid transparent;
  font-weight: 700; text-decoration: none; line-height: 1.2;
  transition: transform 0.18s var(--ease), box-shadow 0.2s, background 0.2s;
}
.btn:active { transform: scale(0.96); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn--sm { padding: 0.6rem 1.1rem; font-size: 0.92rem; }
.btn--primary { background: linear-gradient(135deg, var(--green-700), var(--green-600)); color: #fff; box-shadow: 0 8px 20px rgba(29, 90, 69, 0.28); }
.btn--primary:not(:disabled):hover { transform: translateY(-2px); box-shadow: 0 12px 26px rgba(29, 90, 69, 0.34); }
.btn--ghost { background: rgba(255, 255, 255, 0.6); border-color: var(--border); color: var(--text); }
.btn--ghost:hover { background: var(--surface-2); }
.section--dark .btn--primary { background: var(--mint); color: var(--green-950); box-shadow: none; }

.chip { display: inline-flex; align-items: center; gap: 0.45rem; padding: 0.35rem 0.85rem; border-radius: 999px; background: var(--accent-bg); color: var(--accent); font-size: 0.85rem; font-weight: 700; border: 1px solid var(--border); margin-bottom: 1rem; }

/* ---------- 6. Section umum ---------- */
.section { padding: clamp(5.5rem, 10vw, 8rem) 0 clamp(4.5rem, 8vw, 6.5rem); position: relative; }
.section--dark { background: linear-gradient(160deg, var(--green-950), #123d2e 70%, #0f3a33); }
.section--sage { background: linear-gradient(180deg, var(--sage-100), #dbe9df); }

.section__head { max-width: 720px; margin-bottom: clamp(1.8rem, 4vw, 2.8rem); }
.section__head--center { text-align: center; margin-inline: auto; }
.eyebrow { font-size: 0.82rem; font-weight: 800; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); margin-bottom: 0.6rem; }
h2 { font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 800; margin-bottom: 0.9rem; }
.lead { font-size: clamp(1.02rem, 1.6vw, 1.15rem); color: var(--muted); max-width: 62ch; }
.section__head--center .lead { margin-inline: auto; }
.lead--sm { font-size: 1rem; }
.sub { font-size: clamp(1.25rem, 2.4vw, 1.6rem); font-weight: 800; margin: clamp(2.4rem, 5vw, 3.6rem) 0 1rem; }
.note { padding: 0.9rem 1.1rem; border-left: 4px solid var(--accent); background: var(--accent-bg); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; margin-top: 1.2rem; }
.section--dark .note { color: var(--text); }

.grid { display: grid; gap: var(--gap); }
.cols-3 { grid-template-columns: repeat(3, 1fr); }
.cols-4 { grid-template-columns: repeat(4, 1fr); }

.card { padding: 1.4rem; }
.card h4 { font-size: 1.15rem; margin-bottom: 0.5rem; }
.card__ex { color: var(--muted); font-size: 0.95rem; margin: 0; }

/* ---------- 7. Animasi masuk ---------- */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.6s ease, transform 0.6s var(--ease); transition-delay: var(--d, 0ms); }
.js .reveal.is-visible { opacity: 1; transform: none; }
.js .reveal.is-done { transition: transform 0.25s var(--ease), box-shadow 0.25s, opacity 0.25s; transition-delay: 0ms; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
.fade-in { animation: fadeUp 0.35s var(--ease) both; animation-delay: var(--d, 0ms); }

/* ---------- 8. Beranda ---------- */
.hero {
  min-height: 100svh; display: flex; align-items: center; padding: 7.5rem 0 5.5rem;
  background:
    radial-gradient(900px 520px at 88% 8%, rgba(95, 211, 176, 0.24), transparent 60%),
    radial-gradient(700px 480px at 0% 100%, rgba(74, 163, 199, 0.15), transparent 60%),
    linear-gradient(180deg, #eaf4ee, var(--bg));
}
.hero__grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: clamp(1.5rem, 4vw, 3.5rem); align-items: center; }
h1 { font-size: clamp(2.2rem, 5.4vw, 4rem); font-weight: 800; letter-spacing: -0.03em; margin-bottom: 1.1rem; }
.grad { background: linear-gradient(120deg, var(--green-700), #2a9d8f 60%, #3a8fb7); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 0.8rem; margin: 1.6rem 0 1.4rem; }
.pills { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.5rem; }
.pills li { padding: 0.3rem 0.8rem; border-radius: 999px; background: rgba(255, 255, 255, 0.7); border: 1px solid var(--border); font-size: 0.85rem; font-weight: 600; color: var(--muted); }
.hero__art { display: grid; place-items: center; }
.hero-art { width: 100%; max-width: 560px; height: auto; }
.art-ring { transform-origin: 280px 215px; animation: spin 60s linear infinite; }
.art-float { animation: floaty 4.5s ease-in-out infinite; animation-delay: var(--delay, 0s); }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes floaty { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-9px); } }

.scroll-hint { position: absolute; left: 50%; bottom: 1.2rem; transform: translateX(-50%); display: flex; flex-direction: column; align-items: center; gap: 0.4rem; text-decoration: none; color: var(--muted); font-size: 0.78rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; }
.scroll-hint__mouse { width: 24px; height: 38px; border: 2px solid var(--sage-500); border-radius: 14px; position: relative; }
.scroll-hint__mouse::after { content: ""; position: absolute; left: 50%; top: 7px; width: 4px; height: 8px; margin-left: -2px; border-radius: 3px; background: var(--green-600); animation: wheel 1.8s ease-in-out infinite; }
@keyframes wheel { 0% { transform: translateY(0); opacity: 1; } 70%, 100% { transform: translateY(12px); opacity: 0; } }

/* ---------- 9. Mengenal limbah ---------- */
.define { display: flex; gap: 1.2rem; align-items: flex-start; padding: clamp(1.3rem, 3vw, 2rem); }
.define__icon { flex: none; width: 56px; height: 56px; border-radius: 18px; display: grid; place-items: center; background: linear-gradient(135deg, var(--green-800), var(--green-600)); color: var(--mint); font-size: 1.6rem; }
.define h3 { font-size: 1.3rem; margin-bottom: 0.5rem; }
.define p { margin: 0; }

.src { display: flex; gap: 0.9rem; align-items: center; padding: 1rem 1.1rem; border-radius: var(--radius-sm); }
.src .icon { font-size: 1.7rem; color: var(--accent); }
.src div { display: flex; flex-direction: column; line-height: 1.35; }
.src span { color: var(--muted); font-size: 0.9rem; }

.filters { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 1.2rem 0 1.4rem; }
.filter { padding: 0.5rem 1.1rem; border-radius: 999px; border: 1px solid var(--border); background: var(--surface); font-weight: 700; font-size: 0.92rem; transition: background 0.2s, transform 0.15s; }
.filter:hover { background: var(--surface-2); }
.filter:active { transform: scale(0.96); }
.filter[aria-pressed="true"] { background: var(--green-800); color: #fff; border-color: var(--green-800); }

.wcard { --tone: #2f9e6e; --tone-bg: #dcf2e7; padding: 1.4rem; display: flex; flex-direction: column; gap: 0.7rem; transition: transform 0.25s var(--ease), box-shadow 0.25s; }
.wcard:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.wcard--organik { --tone: #25865c; --tone-bg: #dcf2e7; }
.wcard--anorganik { --tone: #a87408; --tone-bg: #fbefcf; }
.wcard--b3 { --tone: #b83d2e; --tone-bg: #fbe3df; }
.wcard--cair { --tone: #1f7ea6; --tone-bg: #d9eef7; }
.wcard--padat { --tone: #4f6a5d; --tone-bg: #e3ece6; }
.wcard--gas { --tone: #5c6f8a; --tone-bg: #e4e9f1; }
.wcard__top { display: flex; align-items: center; justify-content: space-between; gap: 0.6rem; }
.wcard__icon { width: 52px; height: 52px; border-radius: 16px; display: grid; place-items: center; background: var(--tone-bg); color: var(--tone); font-size: 1.6rem; transition: transform 0.3s var(--ease); }
.wcard:hover .wcard__icon { transform: rotate(-8deg) scale(1.06); }
.wcard__tag { font-size: 0.72rem; font-weight: 800; letter-spacing: 0.04em; text-transform: uppercase; color: var(--tone); background: var(--tone-bg); padding: 0.2rem 0.6rem; border-radius: 999px; }
.wcard h4 { font-size: 1.2rem; }
.wcard p { margin: 0; color: var(--muted); font-size: 0.97rem; }
.wcard__ex { color: var(--text) !important; }
.wcard .btn { margin-top: auto; align-self: flex-start; }

.overlap { margin-top: var(--gap); padding: clamp(1.2rem, 3vw, 1.8rem); }
.overlap h4 { font-size: 1.15rem; margin-bottom: 0.4rem; }
.table-wrap { overflow-x: auto; border-radius: var(--radius-sm); border: 1px solid var(--border); background: rgba(255, 255, 255, 0.55); }
table { width: 100%; min-width: 560px; border-collapse: collapse; font-size: 0.94rem; }
th, td { padding: 0.7rem 0.9rem; text-align: left; border-bottom: 1px solid var(--border); vertical-align: top; }
thead th { background: var(--accent-bg); color: var(--green-800); font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.05em; }
tbody tr:last-child th, tbody tr:last-child td { border-bottom: 0; }
tbody th { font-weight: 700; }

/* ---------- 10. Dampak ---------- */
.panel { padding: clamp(1.2rem, 3vw, 2rem); margin-top: var(--gap); }
.panel__head { margin-bottom: 1.2rem; }
.panel__head h3 { font-size: clamp(1.25rem, 2.4vw, 1.55rem); margin-bottom: 0.3rem; }
.panel__head p { color: var(--muted); margin: 0; }

.compare { position: relative; border-radius: var(--radius-sm); overflow: hidden; aspect-ratio: 800 / 360; background: #bfe6f5; user-select: none; }
.compare svg { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.compare__top { clip-path: inset(0 0 0 var(--pos, 50%)); }
.compare__line { position: absolute; top: 0; bottom: 0; left: var(--pos, 50%); width: 3px; background: #fff; transform: translateX(-50%); box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.12); pointer-events: none; }
.compare__line::after { content: ""; position: absolute; top: 50%; left: 50%; width: 30px; height: 30px; transform: translate(-50%, -50%); border-radius: 50%; background: #fff; box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3); }
.compare__tag { position: absolute; top: 12px; padding: 0.25rem 0.75rem; border-radius: 999px; font-size: 0.8rem; font-weight: 800; color: #fff; background: rgba(15, 46, 34, 0.75); pointer-events: none; }
.compare__tag--l { left: 12px; }
.compare__tag--r { right: 12px; background: rgba(120, 50, 35, 0.8); }
.range { display: block; margin-top: 0.9rem; }
.range input { width: 100%; height: 28px; accent-color: var(--mint); cursor: ew-resize; }

.explorer { display: grid; grid-template-columns: 250px 1fr; gap: var(--gap); align-items: start; }
.explorer__tabs { display: flex; flex-direction: column; gap: 0.5rem; }

/* tombol pilihan umum (tab dampak, kebiasaan, pilih solusi) */
.opt { display: flex; align-items: center; gap: 0.7rem; width: 100%; text-align: left; padding: 0.8rem 1rem; border-radius: var(--radius-sm); background: var(--surface); border: 1px solid var(--border); color: var(--text); font-weight: 700; line-height: 1.3; transition: transform 0.2s var(--ease), background 0.2s, border-color 0.2s; }
.opt:hover { transform: translateY(-2px); border-color: var(--accent); }
.opt:active { transform: scale(0.97); }
.opt[aria-pressed="true"] { background: var(--accent-bg); border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent) inset; }
.opt .icon { font-size: 1.35rem; color: var(--accent); }

.impact { animation: fadeUp 0.35s var(--ease) both; }
.impact__head { display: flex; align-items: center; gap: 0.8rem; margin-bottom: 0.7rem; }
.impact__head .icon { font-size: 2rem; color: var(--accent); }
.impact__head h4 { font-size: 1.4rem; }
.chain { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; gap: 0.5rem; align-items: stretch; margin: 1rem 0; }
.chain__step { padding: 0.8rem 0.9rem; border-radius: var(--radius-sm); background: var(--surface-2); border: 1px solid var(--border); font-size: 0.93rem; font-weight: 600; line-height: 1.4; }
.chain__step small { display: block; font-size: 0.7rem; font-weight: 800; text-transform: uppercase; letter-spacing: 0.08em; color: var(--accent); margin-bottom: 0.2rem; }
.chain__arrow { align-self: center; color: var(--accent); }
.meta { display: grid; grid-template-columns: 1fr 1fr; gap: 0.7rem; }
.meta p { margin: 0; padding: 0.8rem 0.9rem; border-radius: var(--radius-sm); border: 1px dashed var(--border); font-size: 0.93rem; color: var(--muted); }
.meta strong { color: var(--text); display: block; }

.habits { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 0.7rem; }
.sim { margin-top: 1.2rem; padding: 1.2rem; border-radius: var(--radius-sm); background: var(--surface-2); border: 1px solid var(--border); }
.sim__empty { margin: 0; color: var(--muted); }
.sim__body { animation: fadeUp 0.35s var(--ease) both; }
.sim h4 { font-size: 1.2rem; margin-bottom: 0.7rem; }
.sim__steps { list-style: none; padding: 0; margin: 0 0 1rem; display: grid; gap: 0.6rem; counter-reset: s; }
.sim__steps li { counter-increment: s; position: relative; padding-left: 2.6rem; }
.sim__steps li::before { content: counter(s); position: absolute; left: 0; top: 0; width: 1.8rem; height: 1.8rem; border-radius: 50%; display: grid; place-items: center; background: var(--accent); color: var(--green-950); font-weight: 800; font-size: 0.85rem; }
.section:not(.section--dark) .sim__steps li::before { color: #fff; }
.tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1rem; }
.tag { padding: 0.2rem 0.7rem; border-radius: 999px; font-size: 0.8rem; font-weight: 700; background: var(--accent-bg); color: var(--accent); border: 1px solid var(--border); }
.sim__better { margin: 0; padding: 0.8rem 1rem; border-radius: var(--radius-sm); background: var(--accent-bg); border-left: 4px solid var(--accent); }
.sim__better strong { color: var(--accent); }

/* ---------- 11. Solusi ---------- */
.r3 { align-items: start; }
.rcard { padding: 1.2rem; transition: transform 0.25s var(--ease), box-shadow 0.25s; }
.rcard:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.rcard__btn { display: flex; align-items: center; gap: 0.9rem; width: 100%; background: none; border: 0; padding: 0; text-align: left; border-radius: var(--radius-sm); }
.rcard__icon { width: 56px; height: 56px; flex: none; border-radius: 18px; display: grid; place-items: center; font-size: 1.7rem; background: linear-gradient(135deg, var(--green-800), var(--green-600)); color: var(--mint); transition: transform 0.35s var(--ease); }
.rcard:hover .rcard__icon { transform: rotate(-12deg) scale(1.08); }
.rcard__title { display: flex; flex-direction: column; flex: 1; line-height: 1.2; }
.rcard__title strong { font-size: 1.4rem; }
.rcard__title small { color: var(--muted); font-size: 0.9rem; }
.rcard__chev { transition: transform 0.3s var(--ease); color: var(--accent); }
.rcard__btn[aria-expanded="true"] .rcard__chev { transform: rotate(180deg); }
.rcard__lead { margin: 0.9rem 0 0; color: var(--muted); }

.expand { display: grid; grid-template-rows: 0fr; transition: grid-template-rows 0.35s var(--ease); }
.expand__in { overflow: hidden; visibility: hidden; transition: visibility 0s 0.35s; }
.expand.open { grid-template-rows: 1fr; }
.expand.open .expand__in { visibility: visible; transition-delay: 0s; }
.expand ul { padding-left: 1.2rem; margin: 0.9rem 0 0.7rem; }
.expand li { margin-bottom: 0.35rem; }
.tip { margin: 0; padding: 0.7rem 0.9rem; border-radius: var(--radius-sm); background: var(--accent-bg); font-size: 0.93rem; }

.accordion { display: grid; gap: 0.7rem; }
.accordion details { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; }
.accordion summary { list-style: none; cursor: pointer; padding: 1rem 3rem 1rem 1.2rem; font-weight: 700; position: relative; border-radius: var(--radius-sm); }
.accordion summary::-webkit-details-marker { display: none; }
.accordion summary::after { content: "+"; position: absolute; right: 1.2rem; top: 50%; transform: translateY(-50%); font-size: 1.5rem; font-weight: 400; color: var(--accent); transition: transform 0.25s; }
.accordion details[open] summary::after { content: "–"; }
.accordion details[open] summary { background: var(--accent-bg); }
.accordion__body { padding: 1rem 1.2rem 0.4rem; animation: fadeUp 0.3s var(--ease) both; }
.accordion__body ul, .accordion__body ol { padding-left: 1.2rem; }
.accordion__body li { margin-bottom: 0.35rem; }

.role { padding: 1.3rem; transition: transform 0.25s var(--ease); }
.role:hover { transform: translateY(-4px); }
.role .icon { font-size: 1.9rem; color: var(--accent); margin-bottom: 0.5rem; }
.role h4 { font-size: 1.1rem; margin-bottom: 0.35rem; }
.role p { margin: 0; color: var(--muted); font-size: 0.93rem; }

.actions { display: grid; gap: 0.7rem; }
.check { display: flex; gap: 0.9rem; align-items: flex-start; padding: 0.9rem 1rem; border-radius: var(--radius-sm); background: var(--surface-2); border: 1px solid var(--border); cursor: pointer; transition: border-color 0.2s, background 0.2s; }
.check:hover { border-color: var(--accent); }
.check input { width: 1.35rem; height: 1.35rem; margin-top: 0.15rem; accent-color: var(--green-700); flex: none; cursor: pointer; }
.check:has(input:checked) { background: var(--accent-bg); border-color: var(--accent); }
.check span { display: flex; flex-direction: column; line-height: 1.45; }
.check small { color: var(--muted); font-size: 0.92rem; }
.progress-line { margin-top: 1.1rem; }
.progress-line p { margin: 0.5rem 0 0; font-weight: 700; color: var(--accent); }

.bar { height: 10px; border-radius: 999px; background: var(--sage-100); overflow: hidden; border: 1px solid var(--border); }
.bar span { display: block; height: 100%; width: 100%; border-radius: 999px; background: linear-gradient(90deg, var(--mint), var(--blue)); transform-origin: left; transform: scaleX(0); transition: transform 0.5s var(--ease); }

/* Pemutar animasi */
.player__stage { border-radius: var(--radius-sm); background: linear-gradient(180deg, #eef6f1, #dcebe2); border: 1px solid var(--border); padding: 0.5rem; }
.player__stage svg { display: block; width: 100%; height: auto; }
.st > circle:first-child { fill: #fff; stroke: var(--sage-300); stroke-width: 3; transition: fill 0.3s, stroke 0.3s; }
.st { color: #3c5a4c; }
.st.active > circle:first-child { fill: var(--accent-bg); stroke: var(--green-600); stroke-width: 4; }
.st.done > circle:first-child { stroke: var(--green-600); }
.st-label { fill: #24382f; }
.item { transition: transform 0.8s var(--ease), opacity 0.4s; }
.item.hide { opacity: 0; }
.player__info { margin-top: 1rem; min-height: 5.4rem; }
.player__step { font-weight: 800; color: var(--accent); margin-bottom: 0.3rem; }
.player .bar { margin: 0.4rem 0 1rem; }
.player__controls { display: flex; flex-wrap: wrap; gap: 0.6rem; }

/* ---------- 12. Kuis ---------- */
.quiz { padding: clamp(1.3rem, 3.5vw, 2.2rem); }
.quiz__top { display: flex; justify-content: space-between; font-weight: 700; color: var(--muted); margin-bottom: 0.6rem; font-size: 0.95rem; }
.quiz__q { font-size: clamp(1.2rem, 2.6vw, 1.55rem); margin: 1.3rem 0 1rem; line-height: 1.3; outline: none; }
.quiz__options { display: grid; gap: 0.6rem; }
.qopt { display: flex; align-items: center; gap: 0.8rem; width: 100%; text-align: left; padding: 0.85rem 1rem; border-radius: var(--radius-sm); background: var(--surface-2); border: 2px solid var(--border); font-weight: 600; line-height: 1.4; transition: transform 0.18s var(--ease), border-color 0.2s, background 0.2s; }
.qopt:not(:disabled):hover { transform: translateX(3px); border-color: var(--accent); }
.qopt:not(:disabled):active { transform: scale(0.98); }
.qopt:disabled { cursor: default; }
.qopt__letter { flex: none; width: 2rem; height: 2rem; border-radius: 50%; display: grid; place-items: center; background: var(--sage-100); font-weight: 800; font-size: 0.9rem; }
.qopt.is-correct { border-color: #1f9d6a; background: #e0f5ea; }
.qopt.is-correct .qopt__letter { background: #1f9d6a; color: #fff; }
.qopt.is-wrong { border-color: #c0483a; background: #fbe6e3; }
.qopt.is-wrong .qopt__letter { background: #c0483a; color: #fff; }
.quiz__feedback { min-height: 4.2rem; margin: 1rem 0 0.4rem; }
.quiz__feedback p { margin: 0; padding: 0.8rem 1rem; border-radius: var(--radius-sm); animation: fadeUp 0.3s var(--ease) both; }
.quiz__feedback .ok { background: #e0f5ea; border-left: 4px solid #1f9d6a; }
.quiz__feedback .bad { background: #fbe6e3; border-left: 4px solid #c0483a; }
.quiz__actions { display: flex; justify-content: flex-end; }
.quiz__result { text-align: center; padding: 0.5rem 0; animation: fadeUp 0.4s var(--ease) both; }
.score-ring { --pct: 0; width: 150px; height: 150px; border-radius: 50%; margin: 0 auto 1.2rem; display: grid; place-items: center; position: relative; background: conic-gradient(var(--green-600) calc(var(--pct) * 1%), var(--sage-100) 0); }
.score-ring::before { content: ""; position: absolute; inset: 14px; border-radius: 50%; background: #fff; }
.score-ring strong { position: relative; font-size: 2.2rem; font-weight: 800; color: var(--green-800); }
.quiz__result h3 { font-size: 1.6rem; margin-bottom: 0.5rem; outline: none; }
.quiz__result p { max-width: 46ch; margin: 0 auto 1.3rem; color: var(--muted); }

/* ---------- 13. Tentang kelompok ---------- */
.group-name { display: inline-block; padding: 0.45rem 1.1rem; border-radius: 999px; border: 1px solid var(--border); background: var(--surface); font-weight: 700; color: var(--mint); }
.team { list-style: none; margin: 0 0 2rem; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--gap); }
.member { padding: 1.5rem 1rem; text-align: center; display: flex; flex-direction: column; align-items: center; gap: 0.2rem; transition: transform 0.25s var(--ease); }
.member:hover { transform: translateY(-5px); }
.member__avatar { width: 64px; height: 64px; border-radius: 50%; display: grid; place-items: center; margin-bottom: 0.6rem; font-size: 1.6rem; font-weight: 800; color: var(--green-950); background: linear-gradient(135deg, var(--mint), #8fd9ff); }
.member strong { font-size: 1.15rem; }
.member small { color: var(--muted); }
.closing { margin: 0 0 2rem; padding: clamp(1.3rem, 3vw, 2rem); border-radius: var(--radius); border-left: 5px solid var(--mint); background: var(--surface); font-size: clamp(1.05rem, 2vw, 1.25rem); font-style: italic; }
.closing p { margin: 0; }
.refs { padding-left: 1.2rem; }
.refs li { margin-bottom: 0.6rem; }
.refs a { color: var(--accent); font-weight: 600; }
.refs__note { font-size: 0.9rem; color: var(--muted); }

.footer { background: var(--green-950); color: #b7cabf; padding: 1.6rem 0; font-size: 0.9rem; }
.footer__in { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.5rem 1.5rem; }
.footer p { margin: 0; }

/* ---------- 14. Navigasi panah, modal, toast ---------- */
.pager { position: fixed; right: 14px; bottom: 18px; z-index: 55; display: flex; flex-direction: column; gap: 8px; }
.pager button { width: 46px; height: 46px; border-radius: 50%; display: grid; place-items: center; border: 1px solid rgba(21, 66, 51, 0.16); background: rgba(255, 255, 255, 0.82); color: #154233; box-shadow: var(--shadow-sm); -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px); transition: transform 0.18s var(--ease), opacity 0.2s; }
.pager button:hover:not(:disabled) { transform: translateY(-2px); }
.pager button:active:not(:disabled) { transform: scale(0.92); }
.pager button:disabled { opacity: 0.35; cursor: default; }

.modal { border: 0; padding: 0; background: transparent; width: min(640px, 94vw); max-width: none; color: #1f2a26; overflow: visible; }
.modal::backdrop { background: rgba(8, 26, 19, 0.6); }
.modal[open] { animation: pop 0.25s var(--ease); }
@keyframes pop { from { opacity: 0; transform: translateY(14px) scale(0.97); } to { opacity: 1; transform: none; } }
.modal__card { position: relative; background: #fff; border-radius: var(--radius-lg); padding: clamp(1.4rem, 4vw, 2.2rem); box-shadow: 0 30px 80px rgba(0, 0, 0, 0.35); max-height: 86vh; overflow: auto; }
.modal__close { position: absolute; top: 14px; right: 14px; width: 42px; height: 42px; border-radius: 50%; border: 0; background: var(--sage-100); color: #154233; display: grid; place-items: center; }
.modal__close:hover { background: var(--sage-300); }
.modal h3 { font-size: 1.6rem; margin: 0.2rem 2.5rem 0.7rem 0; }
.modal h4 { margin: 1.1rem 0 0.35rem; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--green-700); }
.modal p, .modal li { color: #33433b; }
.modal .note { color: #1f2a26; }
.modal .chip { margin-bottom: 0.4rem; }

.toast { position: fixed; left: 50%; bottom: 24px; z-index: 90; transform: translate(-50%, 24px); max-width: min(92vw, 460px); padding: 0.8rem 1.3rem; border-radius: 999px; background: rgba(15, 46, 34, 0.94); color: #fff; font-weight: 600; font-size: 0.95rem; text-align: center; opacity: 0; pointer-events: none; transition: opacity 0.3s, transform 0.3s var(--ease); -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px); }
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------- 15. Responsif ---------- */
@media (max-width: 1000px) {
  .hero__grid { grid-template-columns: 1fr; text-align: left; }
  .hero__art { order: -1; max-width: 420px; margin-inline: auto; }
  .hero { padding-top: 6.5rem; }
  .cols-4, .team { grid-template-columns: repeat(2, 1fr); }
  .explorer { grid-template-columns: 1fr; }
  .explorer__tabs { flex-direction: row; overflow-x: auto; padding-bottom: 0.3rem; }
  .explorer__tabs .opt { width: auto; white-space: nowrap; flex: none; }
}

@media (max-width: 900px) {
  .nav__toggle { display: grid; }
  .nav__menu { display: none; position: absolute; top: calc(100% + 8px); left: 0; right: 0; flex-direction: column; gap: 0.2rem; padding: 0.6rem; border-radius: var(--radius); background: rgba(255, 255, 255, 0.94); border: 1px solid rgba(21, 66, 51, 0.14); box-shadow: var(--shadow); }
  .nav__menu.open { display: flex; animation: fadeUp 0.25s var(--ease) both; }
  .nav__menu a { padding: 0.8rem 1rem; border-radius: 14px; }
}

@media (max-width: 720px) {
  .cols-3 { grid-template-columns: 1fr; }
  .cols-3.sources { grid-template-columns: 1fr; }
  .chain { grid-template-columns: 1fr; }
  .chain__arrow { justify-self: center; transform: rotate(90deg); }
  .meta { grid-template-columns: 1fr; }
  .define { flex-direction: column; }
  .scroll-hint { display: none; }
  .hero__art { max-width: 300px; }
  /* kurangi blur di layar kecil agar tetap ringan */
  .glass { -webkit-backdrop-filter: none; backdrop-filter: none; background: var(--surface-2); }
  .section--dark .glass { background: rgba(255, 255, 255, 0.1); }
  .pager { right: 10px; bottom: 12px; }
  .pager button { width: 42px; height: 42px; }
  .footer__tip { display: none; }
}

@media (max-width: 480px) {
  .cols-4, .team { grid-template-columns: 1fr; }
  .hero__cta .btn { flex: 1 1 100%; }
  .brand__name small { display: none; }
}

/* ---------- 16. Kurangi animasi sesuai preferensi pengguna ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; transition-delay: 0ms !important; }
  .js .reveal { opacity: 1; transform: none; }
}