/* Diving Navy — Pelajaran Menyelam */
:root {
  --navy: #0a1628;
  --navy-mid: #102040;
  --ocean: #0d4f7c;
  --teal: #0097a7;
  --aqua: #00bcd4;
  --seafoam: #4dd0e1;
  --gold: #ffb300;
  --gold-light: #ffe082;
  --white: #f0f8ff;
  --gray-light: #e3eef7;
  --gray: #8baab8;
  --text: #d0e8f2;
  --text-dark: #0a1628;
  --shadow: 0 4px 24px rgba(0,0,0,0.32);
  --radius: 10px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--navy);
  color: var(--text);
  line-height: 1.65;
  font-size: 16px;
}

/* DEMO BAR */
.demo-bar {
  background: var(--gold);
  color: var(--navy);
  text-align: center;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 700;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 8px;
  z-index: 999;
  position: relative;
}
.demo-bar span { letter-spacing: .04em; }
.demo-bar a {
  background: var(--navy);
  color: var(--gold);
  padding: 3px 12px;
  border-radius: 20px;
  text-decoration: none;
  font-size: 12px;
  font-weight: 700;
  transition: opacity .2s;
}
.demo-bar a:hover { opacity: .8; }
.demo-bar a.pesan {
  background: var(--ocean);
  color: #fff;
}

/* NAV */
nav {
  background: var(--navy-mid);
  border-bottom: 2px solid var(--ocean);
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 62px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--white);
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: .02em;
}
.nav-logo svg { flex-shrink: 0; }
.nav-logo span em {
  color: var(--aqua);
  font-style: normal;
}

/* Mobile menu checkbox hack */
.menu-toggle { display: none; }
.menu-icon {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
}
.menu-icon span {
  display: block;
  width: 26px;
  height: 3px;
  background: var(--white);
  border-radius: 2px;
  transition: transform .3s, opacity .3s;
}
.menu-toggle:checked ~ .menu-icon span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.menu-toggle:checked ~ .menu-icon span:nth-child(2) { opacity: 0; }
.menu-toggle:checked ~ .menu-icon span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

.nav-links {
  display: flex;
  gap: 6px;
  list-style: none;
  align-items: center;
}
.nav-links a {
  color: var(--text);
  text-decoration: none;
  padding: 6px 14px;
  border-radius: 6px;
  font-size: .95rem;
  font-weight: 600;
  transition: background .2s, color .2s;
}
.nav-links a:hover, .nav-links a.active {
  background: var(--ocean);
  color: var(--white);
}
.nav-links .cta-nav a {
  background: var(--gold);
  color: var(--navy);
}
.nav-links .cta-nav a:hover { background: var(--gold-light); }

@media (max-width: 768px) {
  .menu-icon { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 62px;
    left: 0; right: 0;
    background: var(--navy-mid);
    border-bottom: 2px solid var(--ocean);
    flex-direction: column;
    align-items: stretch;
    padding: 12px 20px 20px;
    gap: 4px;
  }
  .menu-toggle:checked ~ .nav-links { display: flex; }
  .nav-links a { display: block; padding: 10px 14px; }
}

/* HERO */
.hero {
  position: relative;
  overflow: hidden;
  padding: 80px 20px 100px;
  text-align: center;
  background: linear-gradient(160deg, var(--navy) 0%, var(--navy-mid) 40%, var(--ocean) 100%);
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 40% at 70% 80%, rgba(0,188,212,.18) 0%, transparent 70%),
    radial-gradient(ellipse 50% 60% at 20% 30%, rgba(13,79,124,.35) 0%, transparent 70%);
  pointer-events: none;
}
/* Animated bubbles via CSS */
.bubbles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}
.bubble {
  position: absolute;
  border-radius: 50%;
  border: 2px solid rgba(0,188,212,.4);
  animation: rise linear infinite;
}
.bubble:nth-child(1) { width:12px;height:12px; left:10%; bottom:-20px; animation-duration:7s; animation-delay:0s; }
.bubble:nth-child(2) { width:20px;height:20px; left:25%; bottom:-20px; animation-duration:9s; animation-delay:1s; }
.bubble:nth-child(3) { width:8px;height:8px; left:50%; bottom:-20px; animation-duration:6s; animation-delay:2s; }
.bubble:nth-child(4) { width:16px;height:16px; left:70%; bottom:-20px; animation-duration:8s; animation-delay:3s; }
.bubble:nth-child(5) { width:10px;height:10px; left:85%; bottom:-20px; animation-duration:7.5s; animation-delay:1.5s; }
@keyframes rise {
  from { transform: translateY(0) scale(1); opacity:.7; }
  to { transform: translateY(-110vh) scale(1.2); opacity:0; }
}

.hero-content { position: relative; z-index: 1; max-width: 720px; margin: 0 auto; }
.hero-badge {
  display: inline-block;
  background: rgba(0,188,212,.18);
  border: 1px solid var(--aqua);
  color: var(--aqua);
  padding: 4px 16px;
  border-radius: 20px;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  margin-bottom: 20px;
}
.hero h1 {
  font-size: clamp(2rem, 6vw, 3.4rem);
  font-weight: 900;
  color: var(--white);
  line-height: 1.15;
  margin-bottom: 18px;
}
.hero h1 em { color: var(--aqua); font-style: normal; }
.hero p {
  font-size: 1.1rem;
  color: var(--text);
  opacity: .9;
  margin-bottom: 32px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}
.hero-btns { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-block;
  padding: 13px 28px;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  transition: transform .2s, box-shadow .2s, opacity .2s;
  cursor: pointer;
  border: none;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,0,0,.3); }
.btn-primary { background: var(--gold); color: var(--navy); }
.btn-outline { background: transparent; color: var(--white); border: 2px solid var(--aqua); }
.btn-ocean { background: var(--ocean); color: var(--white); }

/* SECTIONS */
section { padding: 64px 20px; }
.container { max-width: 1100px; margin: 0 auto; }
.section-label {
  color: var(--aqua);
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  margin-bottom: 10px;
}
.section-title {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 800;
  color: var(--white);
  margin-bottom: 14px;
  line-height: 1.2;
}
.section-sub {
  color: var(--gray);
  font-size: 1rem;
  max-width: 560px;
  margin-bottom: 44px;
}
.text-center { text-align: center; }
.text-center .section-sub { margin-left: auto; margin-right: auto; }

/* CARDS */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}
.card {
  background: var(--navy-mid);
  border: 1px solid rgba(13,79,124,.5);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: transform .2s, border-color .2s, box-shadow .2s;
}
.card:hover { transform: translateY(-4px); border-color: var(--aqua); box-shadow: var(--shadow); }
.card-icon {
  width: 52px; height: 52px;
  background: linear-gradient(135deg, var(--ocean), var(--teal));
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
}
.card h3 { color: var(--white); font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; }
.card p { color: var(--gray); font-size: .93rem; line-height: 1.6; }

/* STATS BAR */
.stats-bar {
  background: linear-gradient(90deg, var(--ocean), var(--teal));
  padding: 40px 20px;
}
.stats-inner {
  max-width: 900px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 24px;
  text-align: center;
}
.stat-num {
  font-size: 2.4rem;
  font-weight: 900;
  color: var(--white);
  line-height: 1;
}
.stat-label { color: rgba(255,255,255,.8); font-size: .88rem; margin-top: 4px; }

/* COURSE TABLE */
.course-table { width: 100%; border-collapse: collapse; margin-top: 8px; }
.course-table th {
  background: var(--ocean);
  color: var(--white);
  padding: 12px 16px;
  text-align: left;
  font-size: .88rem;
  font-weight: 700;
  letter-spacing: .04em;
}
.course-table td {
  padding: 12px 16px;
  font-size: .93rem;
  border-bottom: 1px solid rgba(13,79,124,.3);
}
.course-table tr:nth-child(even) td { background: rgba(13,79,124,.12); }
.course-table tr:hover td { background: rgba(0,188,212,.08); }
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: .78rem;
  font-weight: 700;
}
.badge-gold { background: rgba(255,179,0,.18); color: var(--gold); border: 1px solid var(--gold); }
.badge-teal { background: rgba(0,188,212,.15); color: var(--aqua); border: 1px solid var(--aqua); }
.badge-gray { background: rgba(139,170,184,.12); color: var(--gray); border: 1px solid var(--gray); }

/* GEAR GRID */
.gear-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
}
.gear-card {
  background: var(--navy-mid);
  border: 1px solid rgba(13,79,124,.4);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
  transition: border-color .2s, transform .2s;
}
.gear-card:hover { border-color: var(--aqua); transform: translateY(-3px); }
.gear-icon {
  margin: 0 auto 14px;
  width: 60px; height: 60px;
  display: flex; align-items: center; justify-content: center;
}
.gear-card h4 { color: var(--white); font-size: 1rem; font-weight: 700; margin-bottom: 6px; }
.gear-card p { color: var(--gray); font-size: .85rem; }

/* TESTIMONIALS */
.testi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 22px;
}
.testi-card {
  background: var(--navy-mid);
  border-left: 4px solid var(--aqua);
  border-radius: var(--radius);
  padding: 24px 22px;
}
.stars { color: var(--gold); font-size: 1rem; margin-bottom: 10px; }
.testi-card blockquote { color: var(--text); font-size: .95rem; line-height: 1.6; font-style: italic; margin-bottom: 14px; }
.testi-author { font-weight: 700; color: var(--white); font-size: .9rem; }
.testi-role { color: var(--gray); font-size: .82rem; }

/* INSTRUCTORS */
.instructor-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 24px;
}
.instructor-card {
  background: var(--navy-mid);
  border: 1px solid rgba(13,79,124,.4);
  border-radius: var(--radius);
  padding: 28px 22px;
  text-align: center;
}
.instructor-avatar {
  width: 80px; height: 80px;
  border-radius: 50%;
  margin: 0 auto 16px;
  display: flex; align-items: center; justify-content: center;
  font-size: 2rem;
  font-weight: 900;
  color: var(--white);
}
.instructor-card h3 { color: var(--white); font-size: 1.05rem; font-weight: 700; margin-bottom: 4px; }
.instructor-cert { color: var(--aqua); font-size: .85rem; margin-bottom: 10px; }
.instructor-card p { color: var(--gray); font-size: .88rem; }

/* PACKAGES */
.pkg-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 24px;
  align-items: stretch;
}
.pkg-card {
  background: var(--navy-mid);
  border: 2px solid rgba(13,79,124,.4);
  border-radius: var(--radius);
  padding: 32px 26px;
  display: flex; flex-direction: column;
  transition: border-color .2s, transform .2s;
}
.pkg-card:hover { border-color: var(--aqua); transform: translateY(-4px); }
.pkg-card.featured {
  border-color: var(--gold);
  position: relative;
}
.pkg-card.featured::before {
  content: 'TERPOPULER';
  position: absolute;
  top: -14px; left: 50%; transform: translateX(-50%);
  background: var(--gold);
  color: var(--navy);
  font-size: .72rem;
  font-weight: 900;
  letter-spacing: .08em;
  padding: 3px 14px;
  border-radius: 20px;
}
.pkg-name { color: var(--aqua); font-size: .85rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 8px; }
.pkg-price { font-size: 2rem; font-weight: 900; color: var(--white); margin-bottom: 4px; }
.pkg-price span { font-size: 1rem; font-weight: 400; color: var(--gray); }
.pkg-desc { color: var(--gray); font-size: .88rem; margin-bottom: 20px; }
.pkg-features { list-style: none; flex: 1; margin-bottom: 24px; }
.pkg-features li {
  padding: 6px 0;
  color: var(--text);
  font-size: .9rem;
  display: flex;
  align-items: flex-start;
  gap: 8px;
  border-bottom: 1px solid rgba(13,79,124,.2);
}
.pkg-features li::before {
  content: '';
  display: block;
  width: 18px; height: 18px; flex-shrink: 0;
  background: var(--teal);
  border-radius: 50%;
  margin-top: 2px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M5 13l4 4L19 7' stroke='%23fff' stroke-width='2.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-size: 12px;
  background-repeat: no-repeat;
  background-position: center;
}

/* FORM */
.form-section { background: var(--navy-mid); }
.form-wrap { max-width: 640px; margin: 0 auto; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; color: var(--text); font-size: .9rem; font-weight: 600; margin-bottom: 6px; }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  background: rgba(10,22,40,.7);
  border: 1.5px solid rgba(13,79,124,.5);
  border-radius: 7px;
  color: var(--white);
  padding: 11px 14px;
  font-size: .95rem;
  font-family: inherit;
  transition: border-color .2s;
  outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--aqua); }
.form-group textarea { resize: vertical; min-height: 110px; }
.form-group select option { background: var(--navy); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 560px) { .form-row { grid-template-columns: 1fr; } }
.form-note { color: var(--gray); font-size: .82rem; margin-top: 10px; }

/* DIVIDER WAVE */
.wave-divider {
  width: 100%;
  height: 60px;
  overflow: hidden;
  line-height: 0;
}
.wave-divider svg { display: block; width: 100%; height: 60px; }

/* INFO BOX */
.info-box {
  background: rgba(0,151,167,.12);
  border: 1px solid var(--teal);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 24px;
}
.info-box p { color: var(--text); font-size: .93rem; }

/* CHECKLIST */
.checklist { list-style: none; }
.checklist li {
  padding: 8px 0 8px 32px;
  position: relative;
  color: var(--text);
  font-size: .95rem;
  border-bottom: 1px solid rgba(13,79,124,.2);
}
.checklist li::before {
  content: '';
  position: absolute;
  left: 0; top: 12px;
  width: 18px; height: 18px;
  background: var(--teal);
  border-radius: 50%;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M5 13l4 4L19 7' stroke='%23fff' stroke-width='2.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-size: 11px;
  background-repeat: no-repeat;
  background-position: center;
}

/* LOCATION */
.location-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: start; }
@media (max-width: 720px) { .location-grid { grid-template-columns: 1fr; } }
.location-map-placeholder {
  background: linear-gradient(135deg, var(--navy-mid), var(--ocean));
  border: 1px solid rgba(0,188,212,.3);
  border-radius: var(--radius);
  height: 280px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--gray);
  font-size: .9rem;
  text-align: center;
}
.contact-info-list { list-style: none; }
.contact-info-list li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(13,79,124,.3);
}
.contact-info-list li:last-child { border-bottom: none; }
.ci-icon {
  width: 40px; height: 40px; flex-shrink: 0;
  background: rgba(13,79,124,.4);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
}
.ci-label { color: var(--gray); font-size: .8rem; }
.ci-value { color: var(--white); font-size: .95rem; font-weight: 600; }

/* FOOTER */
footer {
  background: var(--navy-mid);
  border-top: 2px solid var(--ocean);
  padding: 48px 20px 24px;
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 36px;
}
@media (max-width: 680px) { .footer-inner { grid-template-columns: 1fr; } }
.footer-brand p { color: var(--gray); font-size: .88rem; line-height: 1.6; margin-top: 10px; max-width: 280px; }
.footer-col h4 { color: var(--white); font-size: .95rem; font-weight: 700; margin-bottom: 14px; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { color: var(--gray); text-decoration: none; font-size: .88rem; transition: color .2s; }
.footer-col ul li a:hover { color: var(--aqua); }
.footer-bottom {
  max-width: 1100px;
  margin: 0 auto;
  padding-top: 20px;
  border-top: 1px solid rgba(13,79,124,.4);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--gray);
  font-size: .82rem;
}
.footer-bottom a { color: var(--aqua); text-decoration: none; }

/* PAGE HERO (inner pages) */
.page-hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--ocean) 100%);
  padding: 60px 20px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 60px;
  background: var(--navy);
  clip-path: ellipse(60% 100% at 50% 100%);
}
.page-hero h1 { font-size: clamp(1.8rem,5vw,2.8rem); font-weight: 900; color: var(--white); margin-bottom: 12px; position: relative; z-index: 1; }
.page-hero p { color: var(--text); opacity: .85; max-width: 520px; margin: 0 auto; position: relative; z-index: 1; }

/* FAQ */
.faq-item {
  border-bottom: 1px solid rgba(13,79,124,.35);
}
.faq-q {
  width: 100%;
  background: none;
  border: none;
  color: var(--white);
  text-align: left;
  padding: 18px 0;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.faq-q .faq-arrow { color: var(--aqua); font-size: 1.3rem; flex-shrink: 0; }
.faq-a { display: none; color: var(--gray); font-size: .93rem; padding-bottom: 16px; line-height: 1.7; }
input.faq-toggle { display: none; }
input.faq-toggle:checked ~ .faq-a { display: block; }
input.faq-toggle:checked ~ .faq-q .faq-arrow { transform: rotate(45deg); }

/* BREADCRUMB */
.breadcrumb {
  background: var(--navy-mid);
  padding: 10px 20px;
  font-size: .82rem;
  color: var(--gray);
}
.breadcrumb a { color: var(--aqua); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb span { margin: 0 6px; }

/* ALERT */
.alert {
  padding: 14px 18px;
  border-radius: var(--radius);
  margin-bottom: 20px;
  font-size: .9rem;
  font-weight: 600;
}
.alert-success { background: rgba(0,151,167,.15); border: 1px solid var(--teal); color: var(--seafoam); }

/* TWO COL */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; align-items: center; }
@media (max-width: 720px) { .two-col { grid-template-columns: 1fr; } }

/* DIVE ILLUSTRATION */
.diver-visual {
  width: 100%;
  max-width: 380px;
  margin: 0 auto;
  display: block;
}

/* TABLE WRAP */
.table-wrap { overflow-x: auto; border-radius: var(--radius); }

/* SCHEDULE GRID */
.schedule-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
}
.sch-card {
  background: var(--navy-mid);
  border: 1px solid rgba(13,79,124,.4);
  border-radius: var(--radius);
  padding: 18px 16px;
  text-align: center;
}
.sch-day { color: var(--aqua); font-weight: 700; font-size: .85rem; text-transform: uppercase; letter-spacing: .06em; margin-bottom: 6px; }
.sch-time { color: var(--white); font-size: 1.1rem; font-weight: 800; }
.sch-level { color: var(--gray); font-size: .8rem; margin-top: 4px; }

@media (max-width: 600px) {
  section { padding: 48px 16px; }
  .hero { padding: 60px 16px 80px; }
}