:root {
  --lavender-light: #F5F2FA;
  --lavender-muted: #EAE5F8;
  --lavender-base: #C8BFE7;
  --lavender-dark: #A079D0;
  --lavender-pressed: #8860B8;
  --lavender-pressed-darker: #774CA0;
  --accent-butterfly: #D4C0EB;
  --text-primary: #4E3C78;
  --text-title: #7F52AC;
  --gradient-pink: #FFB3DE;
  --gradient-purple: #D4C0EB;
}

.navbar-brand {
  background-color: --text-title !important;
}

#game-board {
  max-width: 80%;
  margin: 0 auto;
}

#game-board > .mb-3 {
  margin-bottom: 0.25rem !important;
}

body {
  background-color: var(--lavender-light);
  color:            var(--text-primary);
}

.navbar {
  background-color: var(--lavender-muted) !important;
  position: relative;
}
.navbar::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--gradient-pink), var(--gradient-purple), var(--gradient-pink));
  background-size: 200% 100%;
  animation: gradient-marquee 4s linear infinite;
}
@keyframes gradient-marquee {
  0% { background-position: 0% 0; }
  100% { background-position: -200% 0; }
}

.form-select {
  border-color: var(--lavender-dark);
}
.form-select:focus {
  border-color: var(--lavender-dark);
  box-shadow: none;
}

.btn {
  outline: none;
  box-shadow: none;
}

.btn-primary {
  background-color: var(--lavender-dark) !important;
  border-color: var(--lavender-dark) !important;
}
.btn-primary:hover {
  background-color: var(--lavender-pressed) !important;
  border-color: var(--lavender-pressed) !important;
}
.btn-primary:active {
  background-color: var(--lavender-pressed-darker) !important;
  border-color: var(--lavender-pressed-darker) !important;
}

.btn-secondary {
  background-color: var(--lavender-muted) !important;
  border-color: var(--lavender-muted) !important;
  color: var(--text-primary) !important;
}
.btn-secondary:hover {
  background-color: var(--lavender-base) !important;
  border-color: var(--lavender-base) !important;
}
.btn-secondary:focus,
.btn-secondary:active {
  background-color: var(--lavender-base) !important;
  border-color: var(--lavender-base) !important;
  box-shadow: none !important;
}
.btn-secondary:disabled {
  opacity: 0.6;
}

.btn-outline-secondary.nav-underline {
  color: var(--text-primary) !important;
  background: transparent !important;
  border: none !important;
}
.btn-outline-secondary.nav-underline:hover,
.btn-outline-secondary.nav-underline:focus,
.btn-outline-secondary.nav-underline:active {
  background: transparent !important;
  border: none !important;
  color: var(--text-primary) !important;
  box-shadow: none !important;
}

.nav-underline {
  position: relative;
  padding-bottom: 0.25rem;
}
.nav-underline::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background-color: var(--accent-butterfly);
  transform: scaleX(0);
  transform-origin: bottom right;
  transition: transform 0.3s ease-out;
}
.nav-underline:hover::after {
  transform: scaleX(1);
  transform-origin: bottom left;
}

/* Flip-card animations */
.flip-card {
  perspective: 1000px;
  width: 80%;
  aspect-ratio: 1;
}
.flip-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.6s ease;
}
.flip-card-inner.flipped {
  transform: rotateY(180deg);
}
.flip-card-front,
.flip-card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  backface-visibility: hidden;
}
.flip-card-back {
  transform: rotateY(180deg);
}

body.dark-mode {
  --lavender-light:         #1a1a2e;
  --lavender-muted:         #2a283a;
  --lavender-base:          #352f4a;
  --lavender-dark:          #423b57;
  --lavender-pressed:       #504668;
  --lavender-pressed-darker:#362f4c;
  --accent-butterfly:       #9b5de5;
  --text-primary:           #e0dfee;
  --text-title:             #f0f0f5;
  --gradient-pink:          #7f5af0;
  --gradient-purple:        #4c4cff;
}