:root {
  --sky:        #4FC3E0;
  --sky-d:      #2A9DBF;
  --sky-l:      #C8EEF8;
  --gold:       #C8903A;
  --gold-l:     #E8B45A;
  --cream:      #FFF8EE;
  --navy:       #0D1F33;
  --navy-m:     #1A3550;
  --navy-l:     #0f2840;
  --dark:       #1A2535;
  --mid:        #4A6070;
  --muted:      #8A9EAD;
  --white:      #FFFFFF;
  --bg:         #F0F6FA;
  --border:     #DDE8F0;
  --success:    #2ECC9A;
  --danger:     #FF6B6B;
  --shadow:     0 8px 40px rgba(44, 120, 160, 0.18);
  --shadow-card: 0 4px 24px rgba(44, 120, 160, 0.10);
  --radius:     18px;
  --nav-h:      100px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Nunito', sans-serif;
  background: var(--white);
  color: var(--dark);
  min-height: 100vh;
}

/* ═══ NAVBAR ═══ */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-m) 100%);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  box-shadow: 0 4px 24px rgba(13, 31, 51, 0.35);
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.nav-logo img {
  width: 160px;
  height: auto;
  object-fit: contain;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.nav-menu li a {
  font-family: 'Nunito', sans-serif;
  font-size: 14px;
  font-weight: 700;
  padding: 8px 18px;
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
  text-decoration: none;
  color: rgba(255, 255, 255, 0.72);
  background: transparent;
}

.nav-menu li a:hover {
  color: var(--white);
  background: rgba(79, 195, 224, 0.18);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn-nav-masuk {
  padding: 9px 22px;
  border-radius: 12px;
  border: 2px solid rgba(79, 195, 224, 0.5);
  background: transparent;
  color: var(--sky);
  font-family: 'Nunito', sans-serif;
  font-size: 13.5px;
  font-weight: 800;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.btn-nav-masuk:hover {
  background: rgba(79, 195, 224, 0.12);
  border-color: var(--sky);
  color: var(--white);
}

.btn-nav-daftar {
  padding: 9px 22px;
  border-radius: 12px;
  border: none;
  background: linear-gradient(135deg, var(--gold) 0%, var(--gold-l) 60%, #f0c56e 100%);
  color: var(--white);
  font-family: 'Nunito', sans-serif;
  font-size: 13.5px;
  font-weight: 800;
  cursor: pointer;
  text-decoration: none;
  box-shadow: 0 4px 14px rgba(200, 144, 58, 0.4);
  transition: transform 0.18s, box-shadow 0.18s, filter 0.18s;
}

.btn-nav-daftar:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(200, 144, 58, 0.55);
  filter: brightness(1.08);
}

.nav-mobile-only {
  display: none;
}

.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2.5px;
  background: rgba(255, 255, 255, 0.85);
  border-radius: 2px;
  transition: all 0.3s;
}

/* ═══ HERO ═══ */
.hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-m) 60%, var(--navy-l) 100%);
  padding: 60px 32px 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 80% 30%, rgba(79, 195, 224, 0.10) 0%, transparent 55%),
    radial-gradient(circle at 20% 80%, rgba(200, 144, 58, 0.08) 0%, transparent 40%);
}

.hero-dots {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: radial-gradient(circle, rgba(79, 195, 224, 0.20) 1.5px, transparent 1.5px);
  background-size: 32px 32px;
  opacity: 0.4;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 50px;
  padding-bottom: 0;
}

.hero-left {
  flex: 1;
  min-width: 0;
  animation: slideUp 0.7s cubic-bezier(.22, 1, .36, 1) both;
  padding-bottom: 60px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 99px;
  background: rgba(79, 195, 224, 0.15);
  border: 1px solid rgba(79, 195, 224, 0.3);
  font-size: 12px;
  font-weight: 700;
  color: var(--sky);
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  animation: pulse 2s ease infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero h1 {
  font-family: 'Baloo 2', cursive;
  font-size: clamp(30px, 4.5vw, 50px);
  font-weight: 800;
  color: var(--white);
  line-height: 1.2;
  margin-bottom: 16px;
}

.hero h1 span {
  background: linear-gradient(90deg, var(--sky), #8AE2F5);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero h1 .gold-text {
  background: linear-gradient(90deg, var(--gold), var(--gold-l));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.7);
  font-weight: 600;
  line-height: 1.8;
  max-width: 540px;
  margin-bottom: 12px;
}

.hero-problem {
  background: rgba(255, 107, 107, 0.10);
  border-left: 3px solid var(--danger);
  padding: 14px 18px;
  border-radius: 0 12px 12px 0;
  margin-bottom: 24px;
  max-width: 520px;
}

.hero-problem p {
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.65);
  font-weight: 600;
  line-height: 1.7;
}

.hero-problem strong {
  color: var(--danger);
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 36px;
  border-radius: 14px;
  border: none;
  background: linear-gradient(135deg, var(--sky-d) 0%, var(--sky) 60%, #6DD5ED 100%);
  color: var(--white);
  font-family: 'Baloo 2', cursive;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.5px;
  cursor: pointer;
  text-decoration: none;
  box-shadow: 0 8px 28px rgba(79, 195, 224, 0.5);
  transition: transform 0.18s, box-shadow 0.18s, filter 0.18s;
}

.hero-cta:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 36px rgba(79, 195, 224, 0.6);
  filter: brightness(1.08);
}

.hero-stats-row {
  display: flex;
  gap: 30px;
  margin-top: 32px;
  flex-wrap: wrap;
}

.hero-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.hero-stat-num {
  font-family: 'Baloo 2', cursive;
  font-size: 28px;
  font-weight: 800;
  color: var(--sky);
  line-height: 1;
}

.hero-stat-lbl {
  font-size: 12px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.5);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.hero-right {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  animation: fadeIn 1s ease 0.3s both;
}

.hero-right img {
  max-width: 100%;
  height: auto;
  max-height: 500px;
  object-fit: contain;
  filter: drop-shadow(0 20px 60px rgba(0, 0, 0, 0.3));
}

/* ═══ SECTIONS ═══ */
.section {
  padding: 70px 28px;
}

.section-light {
  background: var(--bg);
}

.section-dark {
  background: linear-gradient(135deg, var(--navy), var(--navy-m));
}

.section-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 44px;
}

.section-label {
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--sky-d);
  margin-bottom: 8px;
}

.section-title {
  font-family: 'Baloo 2', cursive;
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 800;
  color: var(--dark);
  line-height: 1.3;
}

.section-dark .section-title {
  color: var(--white);
}

.section-title span {
  background: linear-gradient(90deg, var(--sky-d), var(--sky));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-sub {
  font-size: 14px;
  font-weight: 600;
  color: var(--muted);
  margin-top: 8px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.section-dark .section-sub {
  color: rgba(255, 255, 255, 0.55);
}

/* ═══ PAKET BELAJAR ═══ */
.paket-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 22px;
}

.paket-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1.5px solid var(--border);
  transition: transform 0.22s, box-shadow 0.22s;
  display: flex;
  flex-direction: column;
}

.paket-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 36px rgba(44, 120, 160, 0.16);
}

.paket-stripe {
  height: 6px;
  background: linear-gradient(90deg, var(--sky-d), var(--sky));
}

.paket-card:nth-child(2) .paket-stripe {
  background: linear-gradient(90deg, var(--gold), var(--gold-l));
}

.paket-card-body {
  padding: 24px 22px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.paket-icon {
  width: 50px;
  height: 50px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--sky-d), var(--sky));
  color: var(--white);
}

.paket-card:nth-child(2) .paket-icon {
  background: linear-gradient(135deg, var(--gold), var(--gold-l));
}

.paket-name {
  font-family: 'Baloo 2', cursive;
  font-size: 18px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 8px;
}

.paket-desc {
  font-size: 13px;
  color: var(--muted);
  font-weight: 600;
  line-height: 1.7;
  flex: 1;
  margin-bottom: 16px;
}

.paket-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}

.paket-features li {
  font-size: 13px;
  font-weight: 600;
  color: var(--mid);
  display: flex;
  align-items: center;
  gap: 8px;
}

.paket-features li::before {
  content: '✓';
  color: var(--success);
  font-weight: 800;
  font-size: 14px;
}

/* ═══ TESTIMONI ═══ */
.testimoni-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 22px;
}

.testimoni-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1.5px solid rgba(255, 255, 255, 0.10);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: transform 0.22s, border-color 0.22s;
}

.testimoni-card:hover {
  transform: translateY(-4px);
  border-color: rgba(79, 195, 224, 0.3);
}

.testimoni-stars {
  color: var(--gold-l);
  font-size: 16px;
  margin-bottom: 14px;
  letter-spacing: 2px;
}

.testimoni-text {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.75);
  font-weight: 600;
  line-height: 1.8;
  margin-bottom: 18px;
  font-style: italic;
}

.testimoni-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.testimoni-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--sky-d), var(--sky));
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Baloo 2', cursive;
  font-size: 16px;
  font-weight: 800;
  color: var(--white);
  flex-shrink: 0;
}

.testimoni-name {
  font-size: 14px;
  font-weight: 800;
  color: var(--white);
}

.testimoni-role {
  font-size: 12px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.45);
}

/* ═══ PROMO ═══ */
.promo-banner {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-m) 100%);
  border-radius: 22px;
  padding: 48px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  position: relative;
  overflow: hidden;
}

.promo-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 80% 50%, rgba(79, 195, 224, 0.10) 0%, transparent 50%),
    radial-gradient(circle at 20% 50%, rgba(200, 144, 58, 0.08) 0%, transparent 40%);
}

.promo-left {
  position: relative;
  z-index: 1;
}

.promo-badge {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 99px;
  background: rgba(255, 107, 107, 0.20);
  color: var(--danger);
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
}

.promo-title {
  font-family: 'Baloo 2', cursive;
  font-size: clamp(22px, 2.5vw, 30px);
  font-weight: 800;
  color: var(--white);
  line-height: 1.3;
  margin-bottom: 8px;
}

.promo-title span {
  background: linear-gradient(90deg, var(--gold), var(--gold-l));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.promo-desc {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
  font-weight: 600;
  line-height: 1.7;
  max-width: 400px;
}

.promo-right {
  position: relative;
  z-index: 1;
  flex-shrink: 0;
}

.btn-promo {
  padding: 15px 34px;
  border-radius: 14px;
  border: none;
  background: linear-gradient(135deg, var(--gold) 0%, var(--gold-l) 60%, #f0c56e 100%);
  color: var(--white);
  font-family: 'Baloo 2', cursive;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 6px 24px rgba(200, 144, 58, 0.45);
  transition: transform 0.18s, box-shadow 0.18s, filter 0.18s;
}

.btn-promo:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 32px rgba(200, 144, 58, 0.55);
  filter: brightness(1.08);
}

/* ═══ FAQ ═══ */
.faq-list {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--white);
  border: 1.5px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  transition: border-color 0.2s;
}

.faq-item:hover {
  border-color: var(--sky-l);
}

.faq-question {
  width: 100%;
  padding: 18px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: none;
  border: none;
  cursor: pointer;
  font-family: 'Nunito', sans-serif;
  font-size: 15px;
  font-weight: 700;
  color: var(--dark);
  text-align: left;
  transition: color 0.2s;
}

.faq-question:hover {
  color: var(--sky-d);
}

.faq-arrow {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--muted);
  transition: transform 0.3s;
}

.faq-item.open .faq-arrow {
  transform: rotate(180deg);
  color: var(--sky-d);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 22px;
}

.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 0 22px 18px;
}

.faq-answer p {
  font-size: 14px;
  font-weight: 600;
  color: var(--muted);
  line-height: 1.7;
}

/* ═══ FOOTER ═══ */
.footer {
  background: linear-gradient(135deg, #0a1a2a 0%, var(--navy) 100%);
  padding: 50px 28px 30px;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}

.footer-brand img {
  width: 140px;
  height: auto;
  object-fit: contain;
  margin-bottom: 14px;
}

.footer-brand p {
  font-size: 13px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.5);
  line-height: 1.7;
  max-width: 260px;
}

.footer h4 {
  font-family: 'Baloo 2', cursive;
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 16px;
}

.footer ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer ul li a {
  font-size: 13.5px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.5);
  text-decoration: none;
  transition: color 0.2s;
}

.footer ul li a:hover {
  color: var(--sky);
}

.footer-bottom {
  max-width: 1100px;
  margin: 40px auto 0;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  text-align: center;
  font-size: 12.5px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.35);
}

/* ═══ ANIMATIONS ═══ */
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0);    }
}

/* ═══ RESPONSIVE ═══ */
@media (max-width: 860px) {
  .hero-inner {
    flex-direction: column;
    padding-bottom: 0;
  }

  .hero-left {
    padding-bottom: 30px;
  }

  .hero-right {
    display: none;
  }

  .promo-banner {
    flex-direction: column;
    text-align: center;
    padding: 36px 28px;
  }

  .promo-desc {
    max-width: 100%;
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 30px;
  }
}

@media (max-width: 680px) {
  .navbar {
    padding: 0 18px;
  }

  .nav-menu {
    display: none;
    flex-direction: column;
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: var(--navy-m);
    padding: 16px;
    gap: 8px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  }

  .nav-menu.open {
    display: flex;
  }

  .hamburger {
    display: flex;
    margin-left: auto;
  }

  .nav-right {
    display: none;
  }

  .nav-mobile-only {
    display: block !important;
  }

  .nav-mobile-btns {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding-top: 12px;
  }

  .nav-mobile-btns .btn-nav-masuk,
  .nav-mobile-btns .btn-nav-daftar {
    text-align: center;
    display: block;
  }

  .nav-mobile-btns .btn-nav-masuk {
    background: transparent;
    border: 2px solid rgba(79, 195, 224, 0.5);
    color: var(--sky);
    padding: 9px 22px;
    border-radius: 12px;
    font-size: 13.5px;
    font-weight: 800;
  }

  .nav-mobile-btns .btn-nav-daftar {
    background: linear-gradient(135deg, var(--gold) 0%, var(--gold-l) 60%, #f0c56e 100%);
    border: none;
    color: var(--white);
    padding: 9px 22px;
    border-radius: 12px;
    font-size: 13.5px;
    font-weight: 800;
    box-shadow: 0 4px 14px rgba(200, 144, 58, 0.4);
  }

  .hero {
    padding: 40px 20px 0;
  }

  .section {
    padding: 50px 18px;
  }

  .paket-grid,
  .testimoni-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .navbar {
    flex-wrap: wrap;
  }
}