:root {
    --primary: #22d3ee;
    --primary-glow: rgba(34, 211, 238, 0.4);
    --bg-card: #1e293b;
    --bg-app: #0f172a;
}

body {
    -webkit-tap-highlight-color: transparent;
}

/* Scrollbar */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-thumb { background: #334155; border-radius: 2px; }

/* Safe Area for Mobile */
.safe-pb {
    padding-bottom: env(safe-area-inset-bottom);
}

/* Nav Active State */
.nav-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    color: #64748b;
    transition: all 0.2s ease;
    width: 60px;
}
.nav-btn.active {
    color: var(--primary);
    transform: translateY(-2px);
}

/* Cards */
.feature-card {
    background: linear-gradient(145deg, #1e293b, #0f172a);
    border: 1px solid rgba(255,255,255,0.05);
    border-radius: 1rem;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    transition: transform 0.2s, box-shadow 0.2s;
    cursor: pointer;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}
.feature-card:active {
    transform: scale(0.96);
}

.feature-icon {
    font-size: 2.5rem;
    filter: drop-shadow(0 0 10px rgba(255,255,255,0.1));
}

/* Transitions */
.view-enter {
    animation: fadeIn 0.3s ease-out forwards;
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 3D Dice Utilities */
.perspective-1000 {
    perspective: 1000px;
}
.transform-style-3d {
    transform-style: preserve-3d;
}
.die-face {
    backface-visibility: hidden; 
    -webkit-backface-visibility: hidden;
}
.die {
    will-change: transform;
}

/* Coin Utilities */
.coin-face {
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}
.backface-hidden {
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}
.rotate-y-180 {
    transform: rotateY(180deg);
}
.translate-z-\[-5px\] {
    transform: translateZ(-5px);
}

/* Vote Cards (Ranking Module) */
.vote-card {
    background: linear-gradient(145deg, #1e293b, #0f172a);
    border: 2px solid rgba(244, 63, 94, 0.2);
    border-radius: 1rem;
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s ease;
    cursor: pointer;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
}
.vote-card:hover {
    border-color: rgba(244, 63, 94, 0.5);
    transform: translateY(-4px);
    box-shadow: 0 10px 20px -5px rgba(244, 63, 94, 0.3);
}
.vote-card:active {
    transform: scale(0.98);
}

/* RPS Buttons */
.rps-btn {
    background: linear-gradient(145deg, #1e293b, #0f172a);
    border: 2px solid rgba(34, 211, 238, 0.2);
    border-radius: 1rem;
    padding: 1.25rem 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s ease;
    cursor: pointer;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
}
.rps-btn:hover {
    border-color: rgba(34, 211, 238, 0.5);
    transform: translateY(-4px);
    box-shadow: 0 10px 20px -5px rgba(34, 211, 238, 0.3);
}
.rps-btn:active {
    transform: scale(0.95);
}

.rps-emoji {
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.3));
}