:root {
  --bg: #02131C;
  --surface: #08222F;
  --surface-sec: #103446;
  --deep: #0C3B57;
  --crystal: #3CB7E7;
  --aqua: #42D4C8;
  --emerald: #37A98A;
  --pearl: #D8E7EF;
  --gold: #D8B36C;
  --cyan: #A9E8F5;
  --text-pri: #F2FCFF;
  --text-sec: #C5E6EE;
  --muted: #83AEBB;
  --grad-acc: linear-gradient(135deg, #42D4C8, #3CB7E7);
  --grad-sec: linear-gradient(135deg, #D8B36C, #37A98A);
  
  --glass-border: 1px solid rgba(60, 183, 231, 0.2);
  --glass-bg: rgba(8, 34, 47, 0.6);
  --trans: 0.25s ease;
}

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

body {
  background-color: var(--bg);
  color: var(--text-pri);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--trans);
}

a:hover {
  color: var(--crystal);
}

/* BUTTONS */
.btn-primary, .btn-secondary, .btn-submit, .btn-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  border: none;
  transition: transform var(--trans), box-shadow var(--trans);
}

.btn-primary {
  background: var(--grad-acc);
  color: var(--bg);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(66, 212, 200, 0.3);
}

.btn-secondary {
  background: transparent;
  color: var(--text-pri);
  border: 1px solid var(--crystal);
}

.btn-secondary:hover {
  background: rgba(60, 183, 231, 0.1);
  transform: translateY(-2px);
}

.text-link {
  color: var(--aqua);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.text-link:hover {
  color: var(--crystal);
}

/* OCEAN STATUS RIBBON */
.status-ribbon {
  background: var(--deep);
  color: var(--text-sec);
  font-size: 0.8rem;
  text-align: center;
  padding: 6px 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  border-bottom: var(--glass-border);
}

/* FLOATING MARINE HEADER */
.header-wrapper {
  position: sticky;
  top: 15px;
  z-index: 100;
  padding: 0 20px;
}

.main-header {
  max-width: 1200px;
  margin: 0 auto;
  background: rgba(12, 59, 87, 0.85);
  backdrop-filter: blur(10px);
  border: var(--glass-border);
  border-radius: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 24px;
}

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

.logo-img {
  height: 48px;
  width: auto;
  display: block;
  transition: transform var(--trans);
}

.logo-wave:hover .logo-img {
  transform: scale(1.02);
}

.main-nav {
  display: flex;
  gap: 24px;
}

.main-nav a {
  font-size: 0.9rem;
  color: var(--text-sec);
  font-weight: 500;
}

.main-nav a:hover {
  color: var(--text-pri);
}

/* PANORAMIC OCEAN ENTRANCE */
.entrance-section {
  max-width: 1200px;
  margin: 40px auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 40px;
  align-items: center;
}

.entrance-left h1 {
  font-size: 3.2rem;
  line-height: 1.1;
  margin-bottom: 20px;
  background: var(--grad-acc);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.entrance-left p {
  font-size: 1.1rem;
  color: var(--text-sec);
  margin-bottom: 30px;
}

.entrance-actions {
  display: flex;
  gap: 16px;
}

.entrance-right {
  position: relative;
  height: 400px;
}

.hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 20px;
  border: var(--glass-border);
}

.preview-panels {
  position: absolute;
  bottom: -20px;
  left: -20px;
  display: flex;
  gap: 15px;
}

.panel {
  background: var(--glass-bg);
  backdrop-filter: blur(8px);
  border: var(--glass-border);
  border-radius: 12px;
  padding: 12px 20px;
  font-size: 0.85rem;
  color: var(--cyan);
  font-weight: 600;
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

/* MARINE DISCOVERY WALK */
.discovery-walk {
  max-width: 1200px;
  margin: 50px auto;
  padding: 24px;
  background: var(--surface);
  border: var(--glass-border);
  border-radius: 16px;
  display: flex;
  justify-content: space-around;
}

.discovery-item {
  text-align: center;
  color: var(--pearl);
  font-size: 0.95rem;
  font-weight: 500;
  position: relative;
  flex: 1;
}

.discovery-item:not(:last-child)::after {
  content: '↓';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%) rotate(-90deg);
  color: var(--muted);
  opacity: 0.5;
}

/* OCEAN DOME (GAME) */
.ocean-dome {
  max-width: 1020px;
  margin: 60px auto;
  padding: 0 20px;
}

.dome-container {
  background: var(--glass-bg);
  border: 1px solid var(--crystal);
  border-radius: 30px;
  padding: 10px;
  box-shadow: 0 0 40px rgba(60, 183, 231, 0.15), inset 0 0 20px rgba(216, 231, 239, 0.05);
}

.dome-frame {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  background: #000;
  aspect-ratio: 16/9;
}

.dome-frame iframe {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}

.dome-controls {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 20px;
}

/* CORAL OBSERVATORY */
.coral-observatory {
  max-width: 1200px;
  margin: 60px auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.observatory-card {
  background: var(--surface);
  border: var(--glass-border);
  border-radius: 16px;
  overflow: hidden;
  transition: transform var(--trans);
}

.observatory-card:hover {
  transform: translateY(-5px);
}

.observatory-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-bottom: var(--glass-border);
}

.obs-content {
  padding: 20px;
}

.obs-content h3 {
  font-size: 1.1rem;
  color: var(--cyan);
  margin-bottom: 8px;
}

.obs-content p {
  font-size: 0.85rem;
  color: var(--text-sec);
  margin-bottom: 16px;
}

/* OCEAN JOURNAL */
.ocean-journal {
  max-width: 1200px;
  margin: 60px auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.journal-img {
  width: 100%;
  height: 300px;
  object-fit: cover;
  border-radius: 16px;
  border: var(--glass-border);
}

.journal-text h2 {
  font-size: 2rem;
  margin-bottom: 16px;
  color: var(--pearl);
}

.journal-text p {
  color: var(--text-sec);
  margin-bottom: 16px;
  font-size: 0.95rem;
}

/* MARINE RESEARCH CENTER */
.research-center {
  max-width: 1200px;
  margin: 60px auto;
  padding: 20px;
  border-top: var(--glass-border);
  border-bottom: var(--glass-border);
  display: flex;
  justify-content: space-between;
  text-align: center;
}

.research-row {
  color: var(--emerald);
  font-weight: 600;
  font-size: 1rem;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.research-row span {
  font-size: 0.8rem;
  color: var(--muted);
  font-weight: 400;
}

/* EXPLORER LOUNGE */
.explorer-lounge {
  max-width: 1200px;
  margin: 60px auto;
  padding: 40px;
  background: var(--surface-sec);
  border-radius: 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  border: var(--glass-border);
}

.lounge-left h3 {
  font-size: 1.8rem;
  color: var(--aqua);
  margin-bottom: 16px;
}

.support-email {
  display: inline-block;
  font-size: 1.2rem;
  color: var(--text-pri);
  margin-bottom: 24px;
  padding-bottom: 5px;
  border-bottom: 1px solid var(--crystal);
}

.faq-mini h4 {
  color: var(--pearl);
  margin-bottom: 8px;
  margin-top: 16px;
}

.faq-mini p {
  color: var(--text-sec);
  font-size: 0.9rem;
}

.lounge-right form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-group input, .form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--deep);
  border: var(--glass-border);
  border-radius: 8px;
  color: var(--text-pri);
  font-family: inherit;
  outline: none;
}

.form-group input:focus, .form-group textarea:focus {
  border-color: var(--crystal);
}

.form-group textarea {
  resize: vertical;
  height: 100px;
}

/* FOOTER */
.site-footer {
  background: var(--surface);
  border-top: 1px solid rgba(60, 183, 231, 0.3);
  padding: 60px 20px 20px;
  margin-top: 80px;
}

.footer-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  margin-bottom: 60px;
}

.footer-col h5 {
  color: var(--aqua);
  font-size: 1rem;
  margin-bottom: 20px;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col ul li a {
  color: var(--text-sec);
  font-size: 0.9rem;
}

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

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  border-top: var(--glass-border);
  padding-top: 20px;
  text-align: center;
}

.footer-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.footer-logo-img {
  height: 48px;
  width: auto;
  display: block;
}

.footer-disclaimer {
  color: var(--muted);
  font-size: 0.75rem;
  max-width: 800px;
  margin: 0 auto;
}

.footer-address {
  color: var(--muted);
  font-size: 0.75rem;
  max-width: 800px;
  margin: 16px auto 0;
  line-height: 1.5;
}

/* COOKIE POPUP */
.cookie-popup {
  position: fixed;
  bottom: 20px;
  left: 20px;
  width: 320px;
  background: rgba(8, 34, 47, 0.95);
  backdrop-filter: blur(10px);
  border: var(--glass-border);
  border-radius: 22px;
  padding: 24px;
  z-index: 1000;
  display: none;
  box-shadow: 0 10px 40px rgba(0,0,0,0.5);
}

.cookie-popup.show {
  display: block;
}

.cookie-popup h4 {
  color: var(--cyan);
  margin-bottom: 10px;
  font-size: 1.1rem;
}

.cookie-popup p {
  color: var(--text-sec);
  font-size: 0.85rem;
  margin-bottom: 20px;
}

.cookie-actions {
  display: flex;
  gap: 12px;
}

.cookie-actions button {
  flex: 1;
  padding: 8px;
  border-radius: 12px;
  border: none;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.85rem;
}

.btn-accept {
  background: var(--aqua);
  color: var(--bg);
}
.btn-reject {
  background: transparent;
  border: 1px solid var(--muted);
  color: var(--text-sec);
}

/* SUBPAGE STYLES */
.subpage-wrapper {
  max-width: 900px;
  margin: 60px auto;
  padding: 40px;
  background: var(--surface);
  border: var(--glass-border);
  border-radius: 24px;
}

.return-home {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--aqua);
  font-weight: 600;
  margin-bottom: 30px;
  font-size: 0.9rem;
}

.return-home:hover {
  color: var(--crystal);
}

.subpage-title {
  font-size: 2.5rem;
  color: var(--pearl);
  margin-bottom: 24px;
  border-bottom: 1px solid rgba(60, 183, 231, 0.2);
  padding-bottom: 16px;
}

.subpage-content h2 {
  color: var(--cyan);
  margin: 24px 0 12px;
  font-size: 1.4rem;
}

.subpage-content p {
  color: var(--text-sec);
  margin-bottom: 16px;
}

.subpage-content ul {
  color: var(--text-sec);
  margin-bottom: 16px;
  padding-left: 20px;
}

.subpage-content li {
  margin-bottom: 8px;
}

/* Responsive constraints */
@media (max-width: 992px) {
  .entrance-section, .ocean-journal, .explorer-lounge {
    grid-template-columns: 1fr;
  }
  .coral-observatory {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .research-center, .discovery-walk {
    flex-direction: column;
    gap: 20px;
  }
  .discovery-item:not(:last-child)::after {
    display: none;
  }
  .entrance-right {
    height: 300px;
  }
}