/* ==========================================================================
   Etnosains Garam Madura — stylesheet bersama
   Tema: pesisir modern — kaca buram (glassmorphism), gradien lembut,
   sudut membulat besar, bayangan berlapis, dan animasi halus.
   ========================================================================== */

:root {
  --biru-tua: #0a2e3f;
  --biru: #0f6f97;
  --biru-terang: #2196c4;
  --biru-muda: #e3f1f8;
  --pasir: #f7f1e3;
  --pasir-tua: #ece1c8;
  --aksen: #f2a33c;
  --aksen-tua: #dd7f18;
  --grad-aksen: linear-gradient(135deg, #f6b354, #e07b1f);
  --grad-biru: linear-gradient(135deg, #12739e, #0a2e3f);
  --hijau: #2e7d5b;
  --hijau-muda: #e3f3ea;
  --merah: #b8432f;
  --merah-muda: #fbeae6;
  --teks: #20333c;
  --teks-lembut: #5a6d76;
  --garam: #ffffff;
  --kaca: rgba(255, 255, 255, 0.86);
  --batas: rgba(255, 255, 255, 0.72);
  --batas-lembut: #dbe6ea;
  --bayang: 0 14px 36px rgba(10, 46, 63, 0.12), 0 2px 8px rgba(10, 46, 63, 0.07);
  --bayang-kecil: 0 4px 16px rgba(10, 46, 63, 0.1);
  --radius: 18px;
  --radius-besar: 26px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Noto Sans", "Helvetica Neue", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--teks);
  background-color: #fbfdfe;
  /* Panorama tambak garam sebagai latar seluruh halaman,
     dilapisi kabut putih tipis agar teks tetap mudah dibaca */
  background-image: linear-gradient(
      rgba(251, 253, 254, 0.55),
      rgba(251, 253, 254, 0.72)
    ),
    url("../assets/panorama%20tambak%20garam.webp");
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* iOS tidak mendukung background-attachment: fixed — biarkan ikut menggulir */
@media (max-width: 759px) {
  body {
    background-attachment: scroll;
  }
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--biru);
}

::selection {
  background: var(--aksen);
  color: #fff;
}

:focus-visible {
  outline: 3px solid rgba(33, 150, 196, 0.65);
  outline-offset: 2px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--biru-tua);
  color: #fff;
  padding: 10px 16px;
  border-radius: 0 0 10px 0;
  z-index: 200;
}
.skip-link:focus {
  left: 0;
}

/* ---------- Header & navigasi (kaca buram) ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(8, 39, 54, 0.8);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  backdrop-filter: blur(16px) saturate(1.4);
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #fff;
  text-decoration: none;
  font-weight: 800;
  font-size: 1.05rem;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.brand .logo {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #fff;
  background: var(--grad-aksen);
  border-radius: 13px;
  box-shadow: inset 0 -2px 0 rgba(0, 0, 0, 0.16), 0 4px 12px rgba(0, 0, 0, 0.25);
}

.brand small {
  display: block;
  font-weight: 500;
  font-size: 0.72rem;
  color: #b7d5e1;
  letter-spacing: 0.02em;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 13px;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  font-size: 1.3rem;
  cursor: pointer;
  transition: background 0.15s ease;
}

.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.18);
}

.site-nav {
  display: none;
}

.site-nav.open {
  display: block;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: rgba(8, 39, 54, 0.96);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  padding: 8px 16px 16px;
}

.site-nav a {
  display: block;
  color: #e3f0f5;
  text-decoration: none;
  padding: 12px 16px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.98rem;
  transition: background 0.15s ease, color 0.15s ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  background: rgba(255, 255, 255, 0.14);
}

.site-nav a[aria-current="page"] {
  background: var(--grad-aksen);
  color: #fff;
  box-shadow: 0 4px 14px rgba(224, 123, 31, 0.45);
}

@media (min-width: 760px) {
  .nav-toggle {
    display: none;
  }
  .site-nav {
    display: flex;
    gap: 4px;
  }
  .site-nav a {
    display: inline-block;
    padding: 8px 16px;
    font-size: 0.93rem;
  }
}

/* ---------- Struktur halaman ---------- */

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 16px 56px;
}

section {
  margin: 48px 0;
}

h1,
h2,
h3 {
  color: var(--biru-tua);
  line-height: 1.25;
  letter-spacing: -0.02em;
  font-weight: 800;
  /* Bayangan putih halus agar judul tetap jelas di atas foto panorama */
  text-shadow: 0 1px 3px rgba(255, 255, 255, 0.9);
}

h1 {
  font-size: clamp(1.8rem, 4.5vw, 2.7rem);
  margin: 0 0 10px;
}

h2 {
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  margin: 0 0 12px;
}

h3 {
  font-size: 1.15rem;
  margin: 0 0 8px;
}

.lead,
main > section > p {
  text-shadow: 0 1px 2px rgba(255, 255, 255, 0.85);
}

.lead {
  font-size: 1.05rem;
  color: var(--teks-lembut);
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  margin: 0 -16px;
  overflow: hidden;
  color: #fff;
  border-radius: 0 0 var(--radius-besar) var(--radius-besar);
}

.hero img.hero-img {
  width: 100%;
  height: min(66vh, 470px);
  object-fit: cover;
  animation: kenburns 26s ease-in-out infinite alternate;
}

@keyframes kenburns {
  from {
    transform: scale(1);
  }
  to {
    transform: scale(1.1);
  }
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(10, 46, 63, 0.25) 0%,
    rgba(10, 46, 63, 0.5) 55%,
    rgba(10, 46, 63, 0.84) 100%
  );
}

.hero-teks {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 28px 20px;
  max-width: 1100px;
  margin: 0 auto;
}

.hero .kicker {
  display: inline-block;
  background: var(--grad-aksen);
  color: #fff;
  font-weight: 800;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 12px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
}

.hero h1 {
  color: #fff;
  text-shadow: 0 2px 16px rgba(0, 0, 0, 0.4);
}

.hero p {
  max-width: 640px;
  margin: 0 0 20px;
  font-size: 1.03rem;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.45);
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- Tombol ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 11px 26px;
  border-radius: 999px;
  border: 2px solid transparent;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.16s ease, box-shadow 0.16s ease, background 0.16s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0) scale(0.98);
}

.btn-utama {
  background: var(--grad-aksen);
  color: #fff;
  box-shadow: 0 8px 22px rgba(224, 123, 31, 0.38);
}
.btn-utama:hover {
  box-shadow: 0 12px 28px rgba(224, 123, 31, 0.5);
}

.btn-biru {
  background: var(--grad-biru);
  color: #fff;
  box-shadow: 0 8px 22px rgba(10, 46, 63, 0.3);
}
.btn-biru:hover {
  box-shadow: 0 12px 28px rgba(10, 46, 63, 0.42);
}

.btn-putih {
  background: rgba(255, 255, 255, 0.94);
  color: var(--biru-tua);
}
.btn-putih:hover {
  background: #fff;
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.4);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  color: var(--biru);
  border-color: var(--biru);
}
.btn-ghost:hover {
  background: var(--biru-muda);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

/* ---------- Kartu (kaca buram) ---------- */

.kartu,
.gambar-media,
.alur li,
.kartu-butir,
.progress-sist {
  background: var(--kaca);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border: 1px solid var(--batas);
  border-radius: var(--radius);
  box-shadow: var(--bayang);
}

.kartu {
  padding: 24px;
}

.kartu + .kartu {
  margin-top: 16px;
}

.grid-kartu {
  display: grid;
  gap: 16px;
}

@media (min-width: 720px) {
  .grid-kartu {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-kartu.kolom-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

.kartu-bab {
  display: flex;
  flex-direction: column;
  gap: 10px;
  text-decoration: none;
  color: inherit;
  transition: transform 0.16s ease, box-shadow 0.16s ease;
}

.kartu-bab:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 40px rgba(10, 46, 63, 0.18);
}

.kartu-bab .ikon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  font-size: 1.6rem;
  background: var(--grad-biru);
  border-radius: 17px;
  box-shadow: inset 0 -2px 0 rgba(0, 0, 0, 0.2), 0 6px 16px rgba(10, 46, 63, 0.25);
}

.kartu-bab h3 {
  color: var(--biru);
}

.kartu-bab p {
  margin: 0;
  color: var(--teks-lembut);
  font-size: 0.95rem;
}

.nomor-bab {
  display: inline-block;
  background: var(--biru-muda);
  color: var(--biru-tua);
  font-weight: 800;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 999px;
  width: fit-content;
}

/* ---------- Kotak konsep & info ---------- */

.kotak {
  border-left: 5px solid var(--biru);
  background: linear-gradient(135deg, #e7f2f8, #f2f9fc);
  border-radius: 0 14px 14px 0;
  padding: 16px 18px;
  margin: 14px 0;
}

.kotak.rumus {
  border-left-color: var(--aksen);
  background: linear-gradient(135deg, #fdf3e2, #fef8ec);
  text-align: center;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--biru-tua);
}

.kotak.rumus .satuan {
  display: block;
  font-size: 0.82rem;
  font-weight: 400;
  color: var(--teks-lembut);
  margin-top: 4px;
}

.kotak.ayo-amati {
  border-left-color: var(--hijau);
  background: linear-gradient(135deg, #e3f3ea, #f0f9f4);
}

.kotak.mari-berpikir {
  border-left-color: var(--merah);
  background: linear-gradient(135deg, #fbeae6, #fdf4f1);
}

.kotak p:last-child,
.kotak ol:last-child,
.kotak ul:last-child {
  margin-bottom: 0;
}

.kotak ol,
.kotak ul {
  padding-left: 20px;
}

/* ---------- Media (gambar & video) ---------- */

.gambar-media {
  overflow: hidden;
}

.gambar-media img,
.gambar-media video {
  width: 100%;
  background: #eef3f5;
}

.gambar-media img {
  transition: transform 0.45s ease;
}

.gambar-media:hover img {
  transform: scale(1.04);
}

.gambar-media video {
  max-height: 420px;
  object-fit: contain;
}

.keterangan {
  padding: 14px 16px;
  font-size: 0.9rem;
  color: var(--teks-lembut);
  border-top: 1px solid var(--batas-lembut);
  background: rgba(255, 255, 255, 0.6);
}

.keterangan strong {
  color: var(--biru-tua);
}

.keterangan .tanya {
  display: block;
  margin-top: 6px;
  color: var(--aksen-tua);
  font-weight: 600;
}

.grid-media {
  display: grid;
  gap: 16px;
  margin: 16px 0;
}

@media (min-width: 720px) {
  .grid-media {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ---------- Navigasi bab (baris pil kaca) ---------- */

.nav-bab {
  position: sticky;
  top: 66px;
  z-index: 90;
  max-width: 1100px;
  margin: 12px auto 0;
  background: rgba(255, 255, 255, 0.72);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid var(--batas);
  border-radius: 16px;
  box-shadow: var(--bayang-kecil);
  padding: 8px;
  display: flex;
  gap: 6px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.nav-bab a {
  flex: 0 0 auto;
  display: inline-block;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--batas-lembut);
  color: var(--biru-tua);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.86rem;
  padding: 8px 16px;
  border-radius: 999px;
  white-space: nowrap;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
}

.nav-bab a:hover {
  background: var(--biru-muda);
  border-color: var(--biru-terang);
  transform: translateY(-1px);
}

/* ---------- Alur produksi (timeline) ---------- */

.alur {
  list-style: none;
  margin: 16px 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.alur li {
  padding: 16px;
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 14px;
  align-items: center;
  transition: transform 0.16s ease, box-shadow 0.16s ease;
}

.alur li:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 40px rgba(10, 46, 63, 0.16);
}

.alur .step {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  background: var(--grad-aksen);
  color: #fff;
  font-weight: 800;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: inset 0 -2px 0 rgba(0, 0, 0, 0.16), 0 6px 14px rgba(224, 123, 31, 0.35);
}

.alur img {
  display: block;
  /* Layar kecil: gambar tampil penuh di bawah teks langkah */
  grid-column: 1 / -1;
  width: 100%;
  height: 190px;
  object-fit: cover;
  border-radius: 14px;
}

.alur h3 {
  margin: 0;
  font-size: 1.02rem;
}

.alur p {
  margin: 4px 0 0;
  font-size: 0.92rem;
  color: var(--teks-lembut);
}

@media (min-width: 720px) {
  .alur li {
    grid-template-columns: 52px 1fr 230px;
  }
  .alur img {
    /* Desktop: gambar di kolom kanan */
    grid-column: auto;
    width: 230px;
    height: 132px;
  }
}

/* ---------- Kuis ---------- */

.kuis-wrap {
  max-width: 760px;
  margin: 0 auto;
}

.progress-bar {
  height: 12px;
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid var(--batas);
  border-radius: 999px;
  overflow: hidden;
  margin: 10px 0 4px;
}

.progress-bar .isi {
  height: 100%;
  background: linear-gradient(90deg, var(--biru-terang), var(--aksen));
  border-radius: 999px;
  width: 0%;
  transition: width 0.3s ease;
}

.progress-info {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--teks-lembut);
  font-weight: 600;
}

.stimulus {
  background: rgba(247, 241, 227, 0.85);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border: 1px dashed var(--pasir-tua);
  border-radius: 14px;
  padding: 14px 16px;
  margin: 12px 0;
  font-size: 0.95rem;
}

.opsi {
  display: block;
  width: 100%;
  text-align: left;
  background: rgba(255, 255, 255, 0.8);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border: 2px solid rgba(219, 230, 234, 0.95);
  border-radius: 14px;
  padding: 14px 16px;
  margin: 10px 0;
  font-family: inherit;
  font-size: 0.98rem;
  line-height: 1.5;
  cursor: pointer;
  transition: border-color 0.14s ease, background 0.14s ease, transform 0.14s ease,
    box-shadow 0.14s ease;
}

.opsi:hover {
  border-color: var(--biru-terang);
  background: var(--biru-muda);
  transform: translateY(-1px);
  box-shadow: var(--bayang-kecil);
}

.opsi.dipilih {
  border-color: var(--biru);
  background: var(--biru-muda);
}

.opsi.benar {
  border-color: var(--hijau);
  background: var(--hijau-muda);
}

.opsi.salah {
  border-color: var(--merah);
  background: var(--merah-muda);
}

.umpan-balik {
  border-radius: 14px;
  padding: 16px 18px;
  margin: 14px 0;
  font-size: 0.96rem;
}

.umpan-balik.benar {
  background: var(--hijau-muda);
  border: 1px solid #bfe0cf;
}

.umpan-balik.salah {
  background: var(--merah-muda);
  border: 1px solid #ecc7bd;
}

.umpan-balik .judul {
  font-weight: 800;
  display: block;
  margin-bottom: 4px;
}

.umpan-balik.benar .judul {
  color: var(--hijau);
}

.umpan-balik.salah .judul {
  color: var(--merah);
}

.tag-konsep {
  display: inline-block;
  margin-top: 8px;
  background: var(--grad-biru);
  color: #fff;
  font-size: 0.76rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 999px;
}

.skor {
  font-size: clamp(2.8rem, 8vw, 4.2rem);
  font-weight: 800;
  color: var(--biru-tua);
  text-align: center;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.skor small {
  display: block;
  font-size: 1rem;
  color: var(--teks-lembut);
  font-weight: 500;
  letter-spacing: 0;
}

.tabel-rubrik {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 0.92rem;
  margin: 10px 0;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--batas-lembut);
}

.tabel-rubrik th,
.tabel-rubrik td {
  border-bottom: 1px solid var(--batas-lembut);
  padding: 10px 14px;
  text-align: left;
}

.tabel-rubrik tr:last-child th,
.tabel-rubrik tr:last-child td {
  border-bottom: 0;
}

.tabel-rubrik th {
  background: var(--biru-tua);
  color: #fff;
  font-weight: 700;
}

.tabel-rubrik tr:nth-child(even) td {
  background: rgba(227, 241, 248, 0.45);
}

.ulasan {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
}

.ulasan li {
  border-left: 4px solid var(--merah);
  background: var(--merah-muda);
  border-radius: 0 12px 12px 0;
  padding: 12px 16px;
  margin: 8px 0;
  font-size: 0.92rem;
}

/* ---------- SIST ---------- */

.sist-wrap {
  max-width: 680px;
  margin: 0 auto;
}

.progress-sist {
  position: sticky;
  top: 70px;
  z-index: 95;
  padding: 12px 16px;
  margin: 16px 0;
}

.kartu-butir {
  padding: 26px 22px;
  margin: 16px 0;
}

.kartu-butir .no-butir {
  display: inline-block;
  background: var(--grad-biru);
  color: #fff;
  font-weight: 800;
  font-size: 0.8rem;
  padding: 5px 14px;
  border-radius: 999px;
  margin-bottom: 14px;
}

.kartu-butir .pernyataan {
  font-size: 1.14rem;
  font-weight: 700;
  color: var(--biru-tua);
  line-height: 1.5;
  margin-bottom: 20px;
}

.likert {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.likert button {
  min-height: 60px;
  border: 2px solid rgba(219, 230, 234, 0.95);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.8);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--teks);
  cursor: pointer;
  transition: border-color 0.14s ease, background 0.14s ease, transform 0.14s ease,
    box-shadow 0.14s ease;
}

.likert button:hover {
  border-color: var(--biru-terang);
  transform: translateY(-1px);
  box-shadow: var(--bayang-kecil);
}

.likert button:active {
  transform: scale(0.96);
}

.likert button.dipilih {
  border-color: var(--biru);
  background: var(--biru-muda);
  color: var(--biru-tua);
  box-shadow: 0 4px 14px rgba(15, 111, 151, 0.25);
}

.likert button.dipilih::after {
  content: " ✓";
  color: var(--biru);
}

.likert .kecil {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--teks-lembut);
  letter-spacing: 0.03em;
}

.tahap-kartu {
  display: flex;
  flex-direction: column;
  gap: 10px;
  text-align: left;
  font-family: inherit;
  cursor: pointer;
  transition: transform 0.16s ease, box-shadow 0.16s ease;
}

.tahap-kartu:hover {
  transform: translateY(-3px);
  box-shadow: 0 18px 40px rgba(10, 46, 63, 0.16);
}

.tahap-kartu .status {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--hijau);
}

.tahap-kartu.selesai {
  border: 2px solid var(--hijau);
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 26px;
  transform: translateX(-50%) translateY(80px);
  background: rgba(8, 39, 54, 0.92);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  color: #fff;
  padding: 12px 24px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  opacity: 0;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  transition: transform 0.25s ease, opacity 0.25s ease;
  z-index: 300;
  pointer-events: none;
}

.toast.tampil {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* ---------- Footer ---------- */

.site-footer {
  background: linear-gradient(180deg, #0a2e3f, #071e2a);
  color: #cfe2ea;
  margin-top: 56px;
  padding: 32px 16px;
  font-size: 0.9rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.site-footer .footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  gap: 16px;
}

.site-footer strong {
  color: #fff;
}

@media (min-width: 720px) {
  .site-footer .footer-inner {
    grid-template-columns: 1fr 1fr;
  }
}

/* ---------- Utilitas ---------- */

.tengah {
  text-align: center;
}

.spasi-atas {
  margin-top: 24px;
}

.kecil {
  font-size: 0.85rem;
  color: var(--teks-lembut);
}

/* ---------- Animasi muncul saat menggulir (diaktifkan lewat JS) ---------- */

.js-reveal .kartu:not(.kartu-bab),
.js-reveal .gambar-media,
.js-reveal .alur li {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.js-reveal .kartu-bab {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.js-reveal .kartu:not(.kartu-bab).terlihat,
.js-reveal .gambar-media.terlihat,
.js-reveal .alur li.terlihat {
  opacity: 1;
  transform: none;
}

.js-reveal .kartu-bab.terlihat {
  opacity: 1;
  transform: none;
  /* kembalikan transisi cepat untuk efek angkat saat hover */
  transition: transform 0.16s ease, box-shadow 0.16s ease;
}

/* ---------- Aksesibilitas: kurangi gerakan ---------- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
  .hero img.hero-img {
    transform: none;
  }
  .js-reveal .kartu,
  .js-reveal .kartu-bab,
  .js-reveal .gambar-media,
  .js-reveal .alur li {
    opacity: 1;
    transform: none;
  }
}

/* ---------- Navigasi apung (tombol daftar bagian, ikut menggulir) ---------- */

/* Judul ber-anchor berhenti di bawah baris lengket saat dituju */
main [id] {
  scroll-margin-top: 150px;
}

.nav-apung {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 250;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 10px;
}

.nav-apung-tombol {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  background: var(--grad-biru);
  color: #fff;
  font-size: 1.5rem;
  font-weight: 700;
  box-shadow: 0 10px 26px rgba(10, 46, 63, 0.4);
  transition: transform 0.16s ease, box-shadow 0.16s ease;
}

.nav-apung-tombol:hover {
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 14px 32px rgba(10, 46, 63, 0.5);
}

.nav-apung-tombol:active {
  transform: scale(0.95);
}

.nav-apung-panel {
  width: min(310px, calc(100vw - 32px));
  max-height: 62vh;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  background: rgba(255, 255, 255, 0.94);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border: 1px solid var(--batas);
  border-radius: 18px;
  box-shadow: var(--bayang);
  padding: 10px;
}

.nav-apung-panel ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-apung-panel a {
  display: block;
  padding: 9px 14px;
  border-radius: 12px;
  color: var(--biru-tua);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 700;
  line-height: 1.35;
  transition: background 0.14s ease, color 0.14s ease;
}

.nav-apung-panel a:hover {
  background: var(--biru-muda);
}

.nav-apung-panel a.aktif {
  background: var(--grad-biru);
  color: #fff;
}

.nav-apung-panel li.sub a {
  padding-left: 28px;
  font-weight: 500;
  font-size: 0.84rem;
  color: var(--teks-lembut);
}

.nav-apung-panel li.sub a.aktif {
  background: var(--grad-aksen);
  color: #fff;
}

/* ---------- Tombol "Tampilkan Jawaban" pada pertanyaan ---------- */

.tombol-jawaban {
  display: inline-block;
  margin: 8px 0 0;
  padding: 7px 16px;
  border-radius: 999px;
  border: 1px solid var(--biru);
  background: rgba(255, 255, 255, 0.6);
  color: var(--biru);
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.14s ease, color 0.14s ease;
}

.tombol-jawaban:hover {
  background: var(--biru-muda);
}

.tombol-jawaban[aria-expanded="true"] {
  background: var(--biru-muda);
  color: var(--biru-tua);
}

.jawaban {
  margin: 10px 0 0;
  padding: 12px 16px;
  border-radius: 12px;
  background: var(--hijau-muda);
  border: 1px solid #bfe0cf;
  font-size: 0.92rem;
}

.jawaban strong {
  color: var(--hijau);
}