/* ============================================
   OCEAN DEPTHS THEME
   SOURCE Cluster
   ============================================ */

.theme-ocean-depths {
  /* Color Palette */
  --color-primary: #2d8b8b;
  --color-primary-dark: #1a2332;
  --color-primary-light: #a8dadc;
  --color-accent: #a8dadc;
  --color-bg: #f1faee;
  --color-bg-alt: #1a2332;
  --color-text: #1a2332;
  --color-text-light: #f1faee;
  --color-text-muted: #4a5568;
  --color-border: #a8dadc;
  
  /* Typography */
  --font-header: 'Merriweather', Georgia, serif;
  --font-body: 'Open Sans', 'Helvetica Neue', sans-serif;
}

/* Deep Ocean Background */
.theme-ocean-depths .presentation {
  background: linear-gradient(180deg, 
    var(--color-bg) 0%, 
    rgba(168, 218, 220, 0.2) 100%);
}

/* Title Slide - Dark Depths */
.theme-ocean-depths .slide--title {
  background: var(--color-primary-dark);
  color: var(--color-text-light);
}

.theme-ocean-depths .slide--title h1 {
  color: var(--color-accent);
  text-shadow: 0 0 30px rgba(168, 218, 220, 0.3);
}

.theme-ocean-depths .slide--title p {
  color: var(--color-text-light);
}

/* Wave Decoration */
.theme-ocean-depths .slide::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 60px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 60'%3E%3Cpath fill='%232d8b8b' fill-opacity='0.1' d='M0,30 C360,60 720,0 1080,30 C1260,45 1350,45 1440,30 L1440,60 L0,60 Z'/%3E%3C/svg%3E");
  background-size: cover;
  pointer-events: none;
}

/* Cards */
.theme-ocean-depths .card {
  background: white;
  border: 1px solid var(--color-border);
  border-top: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.theme-ocean-depths .card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

/* Buttons */
.theme-ocean-depths .nav-btn {
  background-color: var(--color-primary);
  border-radius: var(--radius-full);
}

.theme-ocean-depths .nav-btn:hover {
  background-color: var(--color-primary-dark);
  box-shadow: 0 0 20px rgba(45, 139, 139, 0.4);
}

/* Progress Bar */
.theme-ocean-depths .progress-bar {
  background: linear-gradient(90deg, var(--color-primary-dark), var(--color-primary));
}

/* Table Styling */
.theme-ocean-depths table th {
  background-color: var(--color-primary-dark);
  color: var(--color-text-light);
}

.theme-ocean-depths table tr:nth-child(even) {
  background-color: rgba(168, 218, 220, 0.1);
}

/* Blockquotes */
.theme-ocean-depths blockquote {
  border-left: 4px solid var(--color-primary);
  padding: var(--space-4) var(--space-6);
  background: rgba(168, 218, 220, 0.1);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

/* Lists in cards */
.theme-ocean-depths .card ul {
  list-style: none;
  padding-left: 0;
}

.theme-ocean-depths .card li {
  padding-left: var(--space-6);
  position: relative;
}

.theme-ocean-depths .card li::before {
  content: '●';
  position: absolute;
  left: 0;
  color: var(--color-primary);
}

/* Slide counter */
.theme-ocean-depths .slide-counter {
  color: var(--color-text-muted);
}