/* Hide color mode switch in navbar and enforce dark visuals */
.theme-switch { display: none !important; }

/* Animated snowflake overlay for core-xmas theme */
:root[data-bs-theme='dark'] {
  --bs-body-bg: #030615;
  --xmas-sky: #072a4a;
  --bs-body-color: #e6eef7;
  --bs-secondary-color: rgba(255,255,255,0.85);

  /* Bootstrap dark variables */
  --bs-dark: #030615;
  --bs-dark-rgb: 3, 6, 21;
  --bs-body-bg-rgb: 3, 6, 21;
  --bs-gradient: none;

  /* Christmas palette */
  --bs-primary: #c0392b; /* festive red */
  --bs-primary-rgb: 192, 57, 43;
  --bs-danger: #c0392b;
  --bs-danger-rgb: 192, 57, 43;
  --bs-secondary: #2e7d32; /* green */
  --bs-secondary-rgb: 46, 125, 50;
  --bs-success: #2e7d32;
  --bs-success-rgb: 46, 125, 50;
  --bs-warning: #d4af37; /* gold */
  --bs-warning-rgb: 212, 175, 55;

  --xmas-silver: #bdc3c7; /* silver */
  --xmas-snow: #ecf0f1; /* snow white */

  --bs-primary-text-emphasis: #fbe183;
}

/* Links */
a {
  color: var(--bs-warning);
  transition: color 0.2s ease;
}
a:hover {
  color: var(--xmas-snow);
}

/* Buttons */
.btn-primary {
  --bs-btn-bg: var(--bs-primary);
  --bs-btn-border-color: var(--bs-primary);
  --bs-btn-hover-bg: #e74c3c;
  --bs-btn-hover-border-color: #e74c3c;
  --bs-btn-color: var(--xmas-snow);
  --bs-btn-hover-color: var(--xmas-snow);
}

.btn-secondary {
  --bs-btn-bg: var(--bs-secondary);
  --bs-btn-border-color: var(--bs-secondary);
  --bs-btn-hover-bg: #388e3c;
  --bs-btn-hover-border-color: #388e3c;
  --bs-btn-color: var(--xmas-snow);
  --bs-btn-hover-color: var(--xmas-snow);
}

/* Logo */
.navbar-brand img {
  filter: drop-shadow(0 0 5px var(--xmas-silver));
}

/* Root background */
html, body {
  background: var(--bs-body-bg) !important;
  color: var(--bs-body-color) !important;
}

/* BG-sensitive components */
[data-bs-theme='dark'] .bg-light,
[data-bs-theme='dark'] .bg-white,
[data-bs-theme='dark'] .card,
[data-bs-theme='dark'] .modal-content,
[data-bs-theme='dark'] .dropdown-menu,
[data-bs-theme='dark'] .offcanvas,
[data-bs-theme='dark'] .jumbotron,
[data-bs-theme='dark'] .jumbotron .container {
  background-color: var(--bs-body-bg) !important;
  color: var(--bs-body-color) !important;
  border-color: var(--xmas-silver) !important;
  box-shadow: none !important;
}

[data-bs-theme='dark'] .btn.btn-light,
[data-bs-theme='dark'] .btn.btn-white,
[data-bs-theme='dark'] .text-bg-light {
  background-color: var(--bs-body-bg) !important;
  color: var(--bs-body-color) !important;
}

[data-bs-theme='dark'] .bg-gradient {
  background-image: none !important;
}

/* Navbar */
[data-bs-theme='dark'] .navbar.bg-dark,
[data-bs-theme='dark'] .navbar-dark {
  background-color: var(--bs-dark) !important;
  color: var(--bs-body-color) !important;
  border-bottom: 1px solid rgba(255,255,255,0.04) !important;
}

[data-bs-theme='dark'] .navbar .navbar-brand,
[data-bs-theme='dark'] .navbar .nav-link,
[data-bs-theme='dark'] .navbar .dropdown-toggle,
[data-bs-theme='dark'] .navbar .navbar-text {
  color: var(--bs-body-color) !important;
}

/* Snow overlay container */
.xmas-overlay {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 0;
  background: transparent;
  overflow: hidden;
}

/* keyframes for slow drifting */
@keyframes drift-slow {
  0% { transform: translateY(-10vh) rotate(0deg); }
  100% { transform: translateY(110vh) rotate(360deg); }
}

.xmas-overlay .snowflake {
  position: absolute;
  opacity: 0.9;
  background-size: contain;
  background-repeat: no-repeat;
  animation: drift-slow linear infinite;
  color: white;
}

/* LARGE — 64x64 */
.xmas-overlay .snowflake.large {
  width: 64px;
  height: 64px;
  background-image: url('/themes/core-xmas/static/img/snowflake-large.svg');
  animation-duration: 22s;
  opacity: 0.9;
}

/* MEDIUM — 48x48 */
.xmas-overlay .snowflake.medium {
  width: 48px;
  height: 48px;
  background-image: url('/themes/core-xmas/static/img/snowflake-med.svg');
  animation-duration: 17s;
  opacity: 0.85;
}

/* SMALL — 32x32 */
.xmas-overlay .snowflake.small {
  width: 32px;
  height: 32px;
  background-image: url('/themes/core-xmas/static/img/snowflake-small.svg');
  animation-duration: 13s;
  opacity: 0.8;
}

/* ----------------------------- */
/* Gift-wrapped challenge boxes  */
/* ----------------------------- */

[data-bs-theme='dark'] .challenge-button {
  padding: 0;
  background: none !important;
  border: none !important;
  position: relative;
  overflow: visible;
}

[data-bs-theme='dark'] .challenge-button .challenge-inner {
  position: relative;
  z-index: 2;
  display: block;
  padding: 1.5rem 1rem;
  border-radius: 8px;
  background-color: var(--bs-primary) !important;
  color: var(--bs-white) !important;
  text-align: center;
  box-shadow: 0 8px 20px rgba(0,0,0,0.45) !important;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

[data-bs-theme='dark'] .challenge-button:hover .challenge-inner {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(0,0,0,0.55) !important;
}

/* Hide content before solving */
[data-bs-theme='dark'] .challenge-button:not(.challenge-solved) .challenge-inner > * {
  visibility: hidden;
  opacity: 0;
}

/* RIBBONS & BOW */
[data-bs-theme='dark'] .challenge-button .challenge-inner::before,
[data-bs-theme='dark'] .challenge-button .challenge-inner::after {
  content: '';
  position: absolute;
  background-color: var(--bs-warning) !important;
  background-image: linear-gradient(180deg, rgba(255,255,255,0.2), rgba(0,0,0,0.2));
  box-shadow: 0 2px 6px rgba(0,0,0,0.45) inset;
  z-index: 1;
  transition: all 0.12s ease;
}

/* Vertical ribbon */
[data-bs-theme='dark'] .challenge-button .challenge-inner::before {
  top: 12px;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  width: 18px;
  border-radius: 3px;
}

/* Horizontal ribbon */
[data-bs-theme='dark'] .challenge-button .challenge-inner::after {
  left: 12px;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  height: 18px;
  border-radius: 3px;
}

/* Bow Knot */
[data-bs-theme='dark'] .challenge-button::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 24px;
  height: 24px;
  background: var(--bs-warning);
  border-radius: 50%;
  z-index: 12;
  box-shadow: 0 0 8px rgba(0,0,0,0.5);
  transition: all 0.12s ease;
}

/* Bow Loops */
[data-bs-theme='dark'] .challenge-button::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(45deg);
  width: 40px;
  height: 40px;
  border: 8px solid var(--bs-warning);
  border-radius: 50% 50% 0 50%;
  z-index: 11;
  box-shadow: 0 0 8px rgba(0,0,0,0.5);
  transition: all 0.12s ease;
}

[data-bs-theme='dark'] .challenge-button:hover::before,
[data-bs-theme='dark'] .challenge-button:hover::after {
  transform: translate(-50%, -50%) scale(1.1);
}

/* Content above ribbons */
[data-bs-theme='dark'] .challenge-button .challenge-inner > * {
  position: relative;
  z-index: 20;
}

/* Solved green-wrapped variant */
[data-bs-theme='dark'] .challenge-button.challenge-solved .challenge-inner {
  background-color: var(--bs-success) !important;
}

/* Hide ribbons when solved */
[data-bs-theme='dark'] .challenge-button.challenge-solved .challenge-inner::before,
[data-bs-theme='dark'] .challenge-button.challenge-solved .challenge-inner::after {
  opacity: 0;
  transform: scale(0.8) translateY(-6px);
}

/* Opened lid illusion */
[data-bs-theme='dark'] .challenge-button.challenge-solved::before {
  content: '';
  position: absolute;
  left: 8px;
  right: 8px;
  top: -14px;
  height: 26px;
  background: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(0,0,0,0.06));
  border-radius: 8px 8px 0 0;
  transform: rotate(-3deg) translateY(-6px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.45);
  z-index: 2;
}

[data-bs-theme='dark'] .challenge-button.challenge-solved::after {
  content: '';
  position: absolute;
  left: 12px;
  right: 12px;
  top: 6px;
  bottom: 12px;
  background: rgba(0,0,0,0.12);
  border-radius: 6px;
  z-index: 1;
}

/* Festive headers */
h1, h2, h3, h4, h5, h6 {
  text-shadow: 0 0 8px var(--xmas-silver);
}

/* Challenge modal */
.nav-tabs .nav-link {
  color: var(--bs-secondary-color);
  border-color: transparent;
}
.nav-tabs .nav-link.active {
  color: var(--bs-warning);
  border-color: var(--bs-warning);
  background: transparent;
}
.nav-tabs .nav-link:hover {
  color: var(--xmas-snow);
}

.challenge-submit.btn-outline-secondary {
  --bs-btn-color: var(--bs-warning);
  --bs-btn-border-color: var(--bs-warning);
  --bs-btn-hover-bg: var(--bs-warning);
  --bs-btn-hover-border-color: var(--bs-warning);
  --bs-btn-hover-color: var(--xmas-snow);
}

.table-striped > tbody > tr:nth-of-type(odd) > * {
  --bs-table-accent-bg: rgba(255, 255, 255, 0.03);
}