:root {
  --ocean-bg: #031827;
  --ocean-panel: rgba(4, 22, 36, 0.86);
  --ocean-panel-strong: rgba(5, 27, 43, 0.95);
  --ocean-card: rgba(255, 255, 255, 0.92);
  --ocean-card-soft: rgba(255, 255, 255, 0.84);
  --ocean-border: rgba(126, 224, 255, 0.26);
  --ocean-accent: #39d6ff;
  --ocean-accent-2: #73f3d6;
  --ocean-text: #eafaff;
  --ocean-muted: #a9cad5;
}
body.theme-manta-blue {
  background:
    linear-gradient(180deg, rgba(1, 19, 32, 0.48), rgba(1, 15, 27, 0.88)),
    url("assets/manta-background.jpg") center top/cover fixed no-repeat;
  color: #102030;
}
body.theme-manta-blue::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(
      circle at 48% 5%,
      rgba(111, 246, 255, 0.22),
      transparent 28%
    ),
    linear-gradient(
      90deg,
      rgba(0, 8, 20, 0.72),
      rgba(0, 75, 98, 0.22),
      rgba(0, 10, 24, 0.78)
    );
  z-index: -1;
}
body.theme-manta-blue header {
  background: linear-gradient(
    90deg,
    rgba(1, 13, 24, 0.95),
    rgba(3, 47, 67, 0.88)
  );
  border-bottom: 1px solid var(--ocean-border);
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.32);
  backdrop-filter: blur(10px);
}
body.theme-manta-blue .brand {
  letter-spacing: 0.02em;
  text-shadow: 0 0 18px rgba(57, 214, 255, 0.38);
}
body.theme-manta-blue .brand small {
  color: var(--ocean-accent-2);
  font-weight: 600;
}
body.theme-manta-blue nav a {
  color: #d7f8ff;
  border-radius: 999px;
  padding: 7px 10px;
  margin-right: 5px;
  border-bottom: 0;
}
body.theme-manta-blue nav a.active,
body.theme-manta-blue nav a:hover {
  color: #001521;
  background: linear-gradient(
    135deg,
    var(--ocean-accent),
    var(--ocean-accent-2)
  );
  border-bottom: 0;
}
body.theme-manta-blue main {
  background: linear-gradient(
    180deg,
    rgba(1, 18, 31, 0.5),
    rgba(1, 16, 28, 0.28)
  );
  border: 1px solid rgba(121, 230, 255, 0.14);
  border-radius: 24px;
  padding: 18px;
  box-shadow: 0 22px 70px rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(3px);
}
body.theme-manta-blue h1,
body.theme-manta-blue h2,
body.theme-manta-blue h3 {
  color: #e9fbff;
}
body.theme-manta-blue .card,
body.theme-manta-blue .metric,
body.theme-manta-blue .stat {
  background: var(--ocean-card);
  border: 1px solid rgba(255, 255, 255, 0.58);
  box-shadow: 0 18px 45px rgba(0, 22, 38, 0.3);
}
body.theme-manta-blue .card .card,
body.theme-manta-blue .inline-edit {
  background: var(--ocean-card-soft);
  border-color: rgba(20, 112, 140, 0.16);
}
body.theme-manta-blue .card h1,
body.theme-manta-blue .card h2,
body.theme-manta-blue .card h3,
body.theme-manta-blue .metric h1,
body.theme-manta-blue .metric h2,
body.theme-manta-blue .metric h3,
body.theme-manta-blue .stat h1,
body.theme-manta-blue .stat h2,
body.theme-manta-blue .stat h3 {
  color: #072235;
}
body.theme-manta-blue .small,
body.theme-manta-blue .muted,
body.theme-manta-blue .metric span,
body.theme-manta-blue .stat span {
  color: #426171;
}
body.theme-manta-blue table {
  background: rgba(255, 255, 255, 0.93);
  border-radius: 12px;
  overflow: hidden;
}
body.theme-manta-blue th {
  background: linear-gradient(180deg, #e8fbff, #d8f3fb);
  color: #0b3446;
}
body.theme-manta-blue td {
  border-bottom-color: rgba(8, 63, 83, 0.13);
}
body.theme-manta-blue input,
body.theme-manta-blue select,
body.theme-manta-blue textarea {
  background: rgba(255, 255, 255, 0.92);
  border-color: rgba(21, 116, 146, 0.34);
  color: #092437;
}
body.theme-manta-blue input:focus,
body.theme-manta-blue select:focus,
body.theme-manta-blue textarea:focus {
  outline: 2px solid rgba(57, 214, 255, 0.42);
  border-color: var(--ocean-accent);
}
body.theme-manta-blue button,
body.theme-manta-blue .btn {
  background: linear-gradient(135deg, #034964, #0887a5);
  box-shadow: 0 8px 18px rgba(0, 69, 98, 0.25);
}
body.theme-manta-blue button:hover,
body.theme-manta-blue .btn:hover {
  filter: brightness(1.08);
}
body.theme-manta-blue .btn.secondary {
  background: linear-gradient(135deg, #425b68, #617783);
}
body.theme-manta-blue .danger {
  background: linear-gradient(135deg, #8d1230, #bd2444) !important;
}
body.theme-manta-blue .flash {
  background: rgba(196, 251, 255, 0.92);
  border-color: rgba(57, 214, 255, 0.65);
  color: #063042;
}
body.theme-manta-blue .calendar-grid {
  background: rgba(0, 30, 46, 0.45);
  border-color: rgba(121, 230, 255, 0.22);
}
body.theme-manta-blue .calendar-head {
  background: linear-gradient(135deg, #032237, #075d78);
}
body.theme-manta-blue .calendar-cell {
  background: rgba(255, 255, 255, 0.88);
}
body.theme-manta-blue .calendar-event {
  background: linear-gradient(135deg, #e1fbff, #c8f5ff);
  color: #06364d;
  border: 1px solid rgba(57, 214, 255, 0.34);
}
body.theme-manta-blue .chip {
  background: #dff9ff;
  border-color: #bfeef9;
  color: #073244;
}
@media print {
  body.theme-manta-blue {
    background: #fff !important;
    color: #222 !important;
  }
  body.theme-manta-blue main {
    background: #fff !important;
    border: 0 !important;
    box-shadow: none !important;
    padding: 0 !important;
  }
  body.theme-manta-blue .card {
    background: #fff !important;
    box-shadow: none !important;
  }
}