:root {
  --hijau-tua: #0F6E56;
  --hijau-muda: #1D9E75;
  --hijau-terang: #5DCAA5;
  --hijau-bg: #E1F5EE;
  --merah-batik: #D85A30;
  --merah-bg: #FAECE7;
  --emas: #BA7517;
  --emas-bg: #FAEEDA;
  --teks-utama: #1a1a1a;
  --teks-sekunder: #4a4a4a;
  --teks-redup: #888;
  --putih: #ffffff;
  --abu-bg: #F5F5F0;
  --border: rgba(0,0,0,0.1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Plus Jakarta Sans', sans-serif;
  color: var(--teks-utama);
  background: var(--abu-bg);
  overflow-x: hidden;
}

/* ===== HERO ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('Bojonegor.jpeg');
  background-size: cover;
  background-position: center;
  filter: brightness(0.95);
}

.hero-bg-pattern {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(15,110,86,0.7) 0%,
    rgba(26,26,26,0.5) 50%,
    rgba(216,90,48,0.4) 100%
  );
}

.hero-bg-pattern::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: 
    repeating-linear-gradient(45deg, transparent, transparent 30px, rgba(255,255,255,0.03) 30px, rgba(255,255,255,0.03) 31px),
    repeating-linear-gradient(-45deg, transparent, transparent 30px, rgba(255,255,255,0.03) 30px, rgba(255,255,255,0.03) 31px);
}

.hero-content {
  position: relative;
  z-index: 10;
  max-width: 1100px;
  margin: 0 auto;
  padding: 5rem 2rem 4rem;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.25);
  color: rgba(255,255,255,0.9);
  padding: 6px 18px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  backdrop-filter: blur(8px);
}

.hero-badge span { font-size: 14px; }

.hero h1 {
  font-family: 'Playfair Display', serif;
  font-size: clamp(2.8rem, 6vw, 5rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.1;
  margin-bottom: 1rem;
  text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.hero h1 em {
  font-style: normal;
  color: #9FE1CB;
}

.hero-sub {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.8);
  max-width: 580px;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
  font-weight: 300;
}

.hero-cta {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-primer {
  background: var(--hijau-muda);
  color: #fff;
  border: none;
  padding: 14px 32px;
  border-radius: 100px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s;
  font-family: 'Plus Jakarta Sans', sans-serif;
  text-decoration: none;
  display: inline-block;
}

.btn-primer:hover { background: var(--hijau-tua); transform: translateY(-2px); }

.btn-sekunder {
  background: rgba(255,255,255,0.15);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.35);
  padding: 14px 32px;
  border-radius: 100px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.25s;
  font-family: 'Plus Jakarta Sans', sans-serif;
  text-decoration: none;
  display: inline-block;
  backdrop-filter: blur(8px);
}

.btn-sekunder:hover { background: rgba(255,255,255,0.25); transform: translateY(-2px); }

.hero-stats {
  position: relative;
  z-index: 10;
  display: flex;
  justify-content: center;
  gap: 0;
  padding: 0 2rem 3rem;
  flex-wrap: wrap;
}

.stat-item {
  flex: 1;
  min-width: 140px;
  max-width: 200px;
  padding: 1.5rem;
  text-align: center;
  border-right: 1px solid rgba(255,255,255,0.15);
}

.stat-item:last-child { border-right: none; }

.stat-num {
  font-family: 'Playfair Display', serif;
  font-size: 2rem;
  font-weight: 700;
  color: #9FE1CB;
}

.stat-label {
  font-size: 12px;
  color: rgba(255,255,255,0.7);
  margin-top: 4px;
  font-weight: 400;
}

/* ===== NAV ===== */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 2rem;
  transform: translateY(-100%);
  transition: transform 0.4s;
}

nav.visible { transform: translateY(0); }

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.nav-logo {
  font-family: 'Playfair Display', serif;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--hijau-tua);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-size: 14px;
  color: var(--teks-sekunder);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover { color: var(--hijau-tua); }

/* ===== SECTIONS ===== */
section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 5rem 2rem;
}

.seksi-label {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--hijau-tua);
  margin-bottom: 0.75rem;
}

.seksi-judul {
  font-family: 'Playfair Display', serif;
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--teks-utama);
  margin-bottom: 1rem;
}

.seksi-deskripsi {
  font-size: 1.05rem;
  color: var(--teks-sekunder);
  line-height: 1.75;
  max-width: 620px;
}

/* ===== MATERI CARDS ===== */
.materi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
}

.materi-card {
  background: var(--putih);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  transition: transform 0.25s, box-shadow 0.25s;
  cursor: pointer;
}

.materi-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.1);
}

.materi-card-header {
  padding: 1.5rem 1.5rem 1rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.materi-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.materi-icon.hijau { background: var(--hijau-bg); }
.materi-icon.merah { background: var(--merah-bg); }
.materi-icon.emas { background: var(--emas-bg); }

.materi-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--teks-utama);
  margin-bottom: 4px;
}

.materi-card p {
  font-size: 0.88rem;
  color: var(--teks-sekunder);
  line-height: 1.6;
}

.materi-card-body { padding: 0 1.5rem 1rem; }

.topik-list {
  list-style: none;
  margin-top: 0.75rem;
}

.topik-list li {
  font-size: 0.85rem;
  color: var(--teks-sekunder);
  padding: 6px 0;
  border-bottom: 1px solid rgba(0,0,0,0.05);
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  transition: color 0.2s;
}

.topik-list li:hover { color: var(--hijau-tua); }

.topik-list li::before {
  content: '→';
  color: var(--hijau-terang);
  font-size: 12px;
}

.topik-list li:last-child { border-bottom: none; }

.materi-card-footer {
  padding: 1rem 1.5rem 1.5rem;
  border-top: 1px solid rgba(0,0,0,0.06);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.badge-level {
  font-size: 11px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 100px;
}

.badge-dasar { background: var(--hijau-bg); color: var(--hijau-tua); }
.badge-menengah { background: var(--emas-bg); color: var(--emas); }
.badge-lanjutan { background: var(--merah-bg); color: var(--merah-batik); }

.btn-mulai {
  font-size: 13px;
  font-weight: 600;
  color: var(--hijau-tua);
  background: none;
  border: none;
  cursor: pointer;
  font-family: 'Plus Jakarta Sans', sans-serif;
  transition: color 0.2s;
}

.btn-mulai:hover { color: var(--hijau-muda); }

/* ===== MODAL ===== */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 200;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.modal-overlay.aktif { display: flex; }

.modal-box {
  background: var(--putih);
  border-radius: 20px;
  width: 100%;
  max-width: 760px;
  max-height: 80vh;
  overflow-y: auto;
  position: relative;
}

.modal-header {
  padding: 1.75rem 2rem 1.25rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  position: sticky;
  top: 0;
  background: var(--putih);
  z-index: 1;
  border-radius: 20px 20px 0 0;
}

.modal-header h2 {
  font-family: 'Playfair Display', serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--teks-utama);
}

.modal-header p {
  font-size: 0.9rem;
  color: var(--teks-sekunder);
  margin-top: 4px;
}

.modal-close {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--abu-bg);
  cursor: pointer;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.2s;
}

.modal-close:hover { background: var(--border); }

.modal-body { padding: 1.75rem 2rem 2rem; }

.konten-materi h3 {
  font-family: 'Playfair Display', serif;
  font-size: 1.2rem;
  color: var(--teks-utama);
  margin: 1.5rem 0 0.75rem;
}

.konten-materi h3:first-child { margin-top: 0; }

.konten-materi p {
  font-size: 0.95rem;
  color: var(--teks-sekunder);
  line-height: 1.75;
  margin-bottom: 0.75rem;
}

.konten-materi .contoh-kotak {
  background: var(--hijau-bg);
  border-left: 3px solid var(--hijau-muda);
  border-radius: 0 8px 8px 0;
  padding: 1rem 1.25rem;
  margin: 1rem 0;
  font-size: 0.9rem;
  color: var(--teks-utama);
  line-height: 1.7;
}

.konten-materi .contoh-kotak strong {
  display: block;
  color: var(--hijau-tua);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}

.konten-materi .info-kotak {
  background: var(--emas-bg);
  border: 1px solid rgba(186,117,23,0.2);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  margin: 1rem 0;
  font-size: 0.88rem;
  color: #4a3010;
  line-height: 1.65;
}

.konten-materi .info-kotak strong { color: var(--emas); }

.konten-materi table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.88rem;
}

.konten-materi th {
  background: var(--hijau-bg);
  color: var(--hijau-tua);
  padding: 8px 12px;
  text-align: left;
  font-weight: 600;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.konten-materi td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  color: var(--teks-sekunder);
}

.konten-materi tr:last-child td { border-bottom: none; }
.konten-materi tr:hover td { background: var(--abu-bg); }

/* ===== AI TUTOR ===== */
.ai-section {
  background: linear-gradient(135deg, #0a3d2b 0%, #0F6E56 60%, #1D9E75 100%);
  position: relative;
  overflow: hidden;
  padding: 0;
}

.ai-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(93,202,165,0.15) 0%, transparent 70%);
  pointer-events: none;
}

.ai-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 5rem 2rem;
  position: relative;
  z-index: 1;
}

.ai-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

@media (max-width: 768px) { .ai-grid { grid-template-columns: 1fr; gap: 2rem; } }

.ai-info .seksi-label { color: #9FE1CB; }
.ai-info .seksi-judul { color: #fff; }
.ai-info .seksi-deskripsi {
  color: rgba(255,255,255,0.75);
  max-width: 100%;
}

.ai-fitur {
  list-style: none;
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.ai-fitur li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: rgba(255,255,255,0.85);
  font-size: 0.9rem;
  line-height: 1.5;
}

.ai-fitur li .ikon-fitur {
  width: 32px;
  height: 32px;
  background: rgba(255,255,255,0.12);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}

/* Chat UI */
.chat-ui {
  background: var(--putih);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.chat-header {
  background: var(--hijau-bg);
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid rgba(15,110,86,0.15);
}

.ai-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--hijau-muda);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.chat-header-info strong {
  font-size: 14px;
  font-weight: 600;
  color: var(--hijau-tua);
  display: block;
}

.chat-header-info span {
  font-size: 11px;
  color: var(--hijau-muda);
}

.chat-messages {
  padding: 1.25rem;
  height: 320px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  scroll-behavior: smooth;
}

.pesan {
  display: flex;
  gap: 8px;
  animation: fadeSlide 0.3s ease-out;
}

@keyframes fadeSlide {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.pesan-ai { align-items: flex-start; }
.pesan-user { align-items: flex-start; flex-direction: row-reverse; }

.pesan-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
}

.pesan-ai .pesan-avatar { background: var(--hijau-bg); }
.pesan-user .pesan-avatar { background: var(--emas-bg); }

.gelembung {
  max-width: 80%;
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 13px;
  line-height: 1.6;
}

.pesan-ai .gelembung {
  background: var(--abu-bg);
  border: 1px solid var(--border);
  color: var(--teks-utama);
  border-radius: 4px 14px 14px 14px;
}

.pesan-user .gelembung {
  background: var(--hijau-muda);
  color: #fff;
  border-radius: 14px 4px 14px 14px;
}

.chat-input-area {
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 8px;
}

.chat-input-area input {
  flex: 1;
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 10px 16px;
  font-size: 13px;
  font-family: 'Plus Jakarta Sans', sans-serif;
  color: var(--teks-utama);
  outline: none;
  transition: border-color 0.2s;
  background: var(--abu-bg);
}

.chat-input-area input:focus {
  border-color: var(--hijau-muda);
  background: var(--putih);
}

.btn-kirim {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--hijau-muda);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  transition: background 0.2s, transform 0.15s;
  flex-shrink: 0;
}

.btn-kirim:hover { background: var(--hijau-tua); transform: scale(1.05); }

.saran-pertanyaan {
  padding: 0 1.25rem 0.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.saran-btn {
  background: var(--hijau-bg);
  border: 1px solid rgba(15,110,86,0.15);
  color: var(--hijau-tua);
  font-size: 11px;
  padding: 5px 10px;
  border-radius: 100px;
  cursor: pointer;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 500;
  transition: background 0.2s;
}

.saran-btn:hover { background: rgba(93,202,165,0.25); }

.mengetik {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 10px 14px;
  background: var(--abu-bg);
  border: 1px solid var(--border);
  border-radius: 4px 14px 14px 14px;
}

.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--teks-redup);
  animation: bounce 1.2s infinite;
}

.dot:nth-child(2) { animation-delay: 0.2s; }
.dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes bounce {
  0%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-6px); }
}

/* ===== LATIHAN SOAL ===== */
.latihan-section { background: var(--putih); }

.quiz-box {
  background: var(--abu-bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2rem;
  margin-top: 2rem;
  max-width: 720px;
}

.progress-bar {
  height: 6px;
  background: rgba(0,0,0,0.08);
  border-radius: 3px;
  margin-bottom: 1.75rem;
  overflow: hidden;
}

.progress-isi {
  height: 100%;
  background: var(--hijau-muda);
  border-radius: 3px;
  transition: width 0.5s ease;
}

.soal-nomor {
  font-size: 11px;
  color: var(--teks-redup);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.75rem;
}

.soal-pertanyaan {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--teks-utama);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.pilihan-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 1.5rem;
}

.pilihan-btn {
  width: 100%;
  text-align: left;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  background: var(--putih);
  font-size: 14px;
  color: var(--teks-utama);
  cursor: pointer;
  font-family: 'Plus Jakarta Sans', sans-serif;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 10px;
}

.pilihan-btn:hover:not(:disabled) { border-color: var(--hijau-muda); background: var(--hijau-bg); }

.pilihan-btn.benar { border-color: #1D9E75; background: var(--hijau-bg); color: var(--hijau-tua); }
.pilihan-btn.salah { border-color: #D85A30; background: var(--merah-bg); color: var(--merah-batik); }

.pilihan-indeks {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--abu-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
  flex-shrink: 0;
}

.pilihan-btn.benar .pilihan-indeks { background: var(--hijau-muda); color: #fff; }
.pilihan-btn.salah .pilihan-indeks { background: var(--merah-batik); color: #fff; }

.umpan-balik {
  padding: 1rem 1.25rem;
  border-radius: 10px;
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 1rem;
  display: none;
}

.umpan-balik.tampil { display: block; }
.umpan-balik.benar { background: var(--hijau-bg); color: var(--hijau-tua); border: 1px solid rgba(29,158,117,0.2); }
.umpan-balik.salah { background: var(--merah-bg); color: var(--merah-batik); border: 1px solid rgba(216,90,48,0.2); }

.quiz-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.btn-lanjut {
  background: var(--hijau-muda);
  color: #fff;
  border: none;
  padding: 10px 24px;
  border-radius: 100px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  font-family: 'Plus Jakarta Sans', sans-serif;
  transition: background 0.2s;
  display: none;
}

.btn-lanjut.tampil { display: block; }
.btn-lanjut:hover { background: var(--hijau-tua); }

.skor-info { font-size: 13px; color: var(--teks-redup); }

/* ===== FOOTER ===== */
footer {
  background: #0a3d2b;
  color: rgba(255,255,255,0.7);
  padding: 3rem 2rem;
  text-align: center;
}

footer .logo-footer {
  font-family: 'Playfair Display', serif;
  font-size: 1.4rem;
  font-weight: 700;
  color: #9FE1CB;
  margin-bottom: 0.5rem;
}

footer p {
  font-size: 0.88rem;
  line-height: 1.7;
}

/* ===== MATERI PAGE LAYOUT ===== */
nav {
  background: var(--putih);
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

nav.container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.75rem 2rem;
}

.btn-kembali {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--hijau-muda);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s;
}

.btn-kembali:hover {
  background: var(--hijau-tua);
  transform: translateX(-3px);
}

#nav-judul-bab {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--teks-utama);
  margin-left: 1rem;
}

.materi-layout {
  max-width: 1000px;
  margin: 0 auto;
  padding: 3rem 2rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
}

.konten-bacaan {
  background: var(--putih);
  border-radius: 16px;
  padding: 2.5rem;
  border: 1px solid var(--border);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
}

.konten-bacaan h1 {
  font-family: 'Playfair Display', serif;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 700;
  color: var(--teks-utama);
  margin-bottom: 0.5rem;
  line-height: 1.2;
}

.konten-bacaan .sub-judul {
  font-size: 1.05rem;
  color: var(--teks-sekunder);
  margin-bottom: 1.5rem;
  line-height: 1.6;
  font-style: italic;
}

.konten-bacaan hr {
  border: none;
  border-top: 2px solid var(--hijau-muda);
  margin-bottom: 2rem;
  opacity: 0.3;
}

.isi-artikel {
  color: var(--teks-utama);
  line-height: 1.8;
  font-size: 0.95rem;
}

.isi-artikel h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--hijau-tua);
  margin-top: 2rem;
  margin-bottom: 1rem;
}

.isi-artikel p {
  margin-bottom: 1rem;
}

.isi-artikel ul,
.isi-artikel ol {
  margin-left: 1.5rem;
  margin-bottom: 1rem;
}

.isi-artikel li {
  margin-bottom: 0.5rem;
}

.isi-artikel table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.isi-artikel th {
  background: var(--hijau-bg);
  padding: 1rem;
  text-align: left;
  font-weight: 600;
  color: var(--hijau-tua);
  border-bottom: 2px solid var(--hijau-muda);
}

.isi-artikel td {
  padding: 1rem;
  border-bottom: 1px solid var(--border);
}

.isi-artikel tr:last-child td {
  border-bottom: none;
}

.info-kotak,
.contoh-kotak {
  padding: 1.25rem;
  margin-bottom: 1.5rem;
  border-radius: 8px;
  border-left: 4px solid var(--hijau-muda);
}

.info-kotak {
  background: var(--hijau-bg);
  color: var(--hijau-tua);
}

.contoh-kotak {
  background: var(--abu-bg);
  color: var(--teks-utama);
  border-left-color: var(--emas);
}

/* ===== QUIZ SECTION DI MATERI PAGE ===== */
.area-kuis {
  background: linear-gradient(135deg, #f8fbfc 0%, #f0f9f8 100%);
  border-radius: 20px;
  padding: 2.5rem;
  margin-top: 3rem;
  border: 2px solid rgba(29, 158, 117, 0.1);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
}

.area-kuis h2 {
  font-family: 'Playfair Display', serif;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--teks-utama);
  margin-bottom: 2rem;
  position: relative;
  padding-bottom: 1rem;
}

.area-kuis h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--hijau-muda), #1D9E75);
  border-radius: 2px;
}

.blok-soal {
  background: var(--putih);
  border: 2px solid var(--border);
  border-radius: 16px;
  padding: 1.75rem;
  margin-bottom: 1.75rem;
  transition: all 0.3s ease;
}

.blok-soal:hover {
  border-color: var(--hijau-muda);
  box-shadow: 0 8px 24px rgba(29, 158, 117, 0.12);
}

.tanya {
  font-size: 1rem;
  font-weight: 600;
  color: var(--teks-utama);
  margin-bottom: 1.25rem;
  line-height: 1.6;
}

.pilihan-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 1.5rem;
}

.btn-pilihan {
  width: 100%;
  text-align: left;
  padding: 12px 16px;
  border: 2px solid var(--border);
  border-radius: 12px;
  background: var(--putih);
  font-size: 0.95rem;
  color: var(--teks-utama);
  cursor: pointer;
  font-family: 'Plus Jakarta Sans', sans-serif;
  transition: all 0.25s ease;
  font-weight: 500;
}

.btn-pilihan:hover:not(:disabled) {
  border-color: var(--hijau-muda);
  background: var(--hijau-bg);
  transform: translateX(4px);
  box-shadow: 0 4px 12px rgba(29, 158, 117, 0.15);
}

.btn-pilihan:disabled {
  opacity: 0.8;
  cursor: not-allowed;
}

.btn-pilihan.jawaban-benar {
  border-color: #1D9E75;
  background: linear-gradient(135deg, rgba(29, 158, 117, 0.1) 0%, rgba(159, 225, 203, 0.1) 100%);
  color: #1D9E75;
  font-weight: 600;
}

.btn-pilihan.jawaban-salah {
  border-color: #D85A30;
  background: linear-gradient(135deg, rgba(216, 90, 48, 0.1) 0%, rgba(216, 90, 48, 0.08) 100%);
  color: #D85A30;
}

.umpan-balik {
  padding: 1rem 1.25rem;
  border-radius: 12px;
  font-size: 0.95rem;
  line-height: 1.6;
  margin-top: 1rem;
  margin-bottom: 1.5rem;
  border-left: 4px solid transparent;
  font-weight: 500;
  animation: slideIn 0.3s ease;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.umpan-balik.hidden {
  display: none;
}

.umpan-balik:not(.hidden) {
  background: var(--hijau-bg);
  color: var(--hijau-tua);
  border-left-color: #1D9E75;
}

.no-quiz {
  text-align: center;
  color: var(--teks-redup);
  padding: 2rem;
  font-size: 1rem;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 640px) {
  .hero-stats { display: none; }
  .materi-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Styling Navigasi */
.nav-materi {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background-color: #ffffff;
  border-b: 1px solid #e2e8f0;
}

.nav-kiri {
  display: flex;
  align-items: center;
  gap: 15px;
}

/* Container Tombol PDF */
.pdf-action-group {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

/* Base Style Tombol Aksi PDF */
.btn-pdf-action {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.88rem;
  transition: all 0.2s ease;
  box-shadow: 0 2px 4px rgba(0,0,0,0.08);
}

/* Tombol 1: Buka di Browser (Warna Biru) */
.btn-view {
  background-color: #0284c7;
  color: #ffffff;
  border: 1px solid #0369a1;
}

.btn-view:hover {
  background-color: #0369a1;
  transform: translateY(-1px);
}

/* Tombol 2: Unduh PDF (Warna Hijau/Netral) */
.btn-download {
  background-color: #16a34a;
  color: #ffffff;
  border: 1px solid #15803d;
}

.btn-download:hover {
  background-color: #15803d;
  transform: translateY(-1px);
}

/* Navigasi PDF */
.btn-pdf-view {
  background-color: #0284c7;
  color: white;
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 0.85rem;
  text-decoration: none;
  font-weight: 600;
}

.btn-pdf-view:hover {
  background-color: #0369a1;
}

.hidden {
  display: none !important;
}