:root {
    --bg-color: #10101a;
    --primary-color: #8a2be2;
    --accent-color: #00d2ff;
    --text-color: #f0f0f0;
    --text-dim: #a0a0b0;
    --success-color: #00ff88;
    --danger-color: #ff4757;
    --gold-color: #ffd700;
    --card-bg: rgba(20, 20, 30, 0.7);
    --border-color: rgba(255, 255, 255, 0.1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow: hidden;
    background: radial-gradient(circle, #2a0a4a, var(--bg-color));
}

#app-container { width: 100%; max-width: 500px; padding: 20px; }

/* --- Screen Transitions --- */
.screen { display: none; }
.screen.active {
    display: block;
    animation: screenEnter 0.7s cubic-bezier(0.25, 1, 0.5, 1) forwards;
}
.hidden { display: none !important; }

@keyframes screenEnter {
    from { opacity: 0; transform: translateY(30px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

/* --- General UI --- */
.glass-card {
    background: var(--card-bg);
    backdrop-filter: blur(15px);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 30px 40px;
    text-align: center;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    margin-bottom: 20px;
}
.title {
    font-family: 'Orbitron', sans-serif;
    font-size: 2.5rem;
    margin-bottom: 10px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.subtitle { color: var(--text-dim); margin-bottom: 30px; }
.input-group { margin-bottom: 20px; }
input[type="text"] {
    width: 100%;
    padding: 15px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-color);
    font-size: 1rem;
    text-align: center;
    transition: all 0.3s ease;
}
input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 15px rgba(138, 43, 226, 0.5);
}
.btn {
    width: 100%;
    padding: 15px;
    border: none;
    border-radius: 50px;
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
    font-size: 1rem;
    letter-spacing: 1px;
    cursor: pointer;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    color: white;
    transition: all 0.3s ease;
    text-transform: uppercase;
}
.btn:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}
.btn:active { transform: translateY(-1px) scale(0.98); }
.btn-secondary { background: transparent; border: 2px solid var(--primary-color); color: var(--primary-color); }
.btn-small { padding: 10px 20px; font-size: 0.9rem; }

/* --- Avatar Selection --- */
.avatar-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 15px; margin-bottom: 30px; }
.avatar {
    width: 60px; height: 60px;
    border-radius: 50%;
    display: flex; justify-content: center; align-items: center;
    font-size: 2.5rem; cursor: pointer;
    transition: all 0.3s cubic-bezier(0.25, 1, 0.5, 1);
    background-color: rgba(255, 255, 255, 0.1);
}
.avatar:hover { transform: scale(1.15) rotate(5deg); }
.avatar.selected {
    border: 3px solid var(--accent-color);
    transform: scale(1.1);
    box-shadow: 0 0 20px var(--accent-color);
    animation: pulse 1.5s infinite;
}
@keyframes pulse { 0%, 100% { transform: scale(1.1); } 50% { transform: scale(1.15); } }

/* --- Main Menu --- */
.app-header { display: flex; justify-content: space-between; align-items: center; padding: 0 10px 20px; }
.profile-display { display: flex; align-items: center; gap: 10px; }
.profile-display .avatar { width: 45px; height: 45px; font-size: 1.8rem; }
#logout-btn { width: auto; padding: 8px 15px; font-size: 0.8rem; }
.wallet-info { padding: 20px; }
.balance-display { display: flex; justify-content: space-between; align-items: center; margin-bottom: 15px; }
.balance-label { color: var(--text-dim); }
.balance-amount { font-family: 'Orbitron', sans-serif; font-size: 1.8rem; color: var(--success-color); }
.wallet-address { font-family: monospace; font-size: 0.9rem; color: var(--text-dim); margin-bottom: 20px; }
.wallet-actions { display: flex; gap: 10px; }
.stake-selection .stake-buttons { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }

/* --- Game & Result Animations --- */
.spinner { width: 50px; height: 50px; border: 5px solid var(--border-color); border-top-color: var(--primary-color); border-radius: 50%; animation: spin 1s linear infinite; margin: 20px auto; }
@keyframes spin { to { transform: rotate(360deg); } }
.game-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.player-info { text-align: center; }
.player-info .avatar { margin: 0 auto 10px; }
.vs-text { font-family: 'Orbitron', sans-serif; font-size: 2.5rem; font-weight: 900; }
.pot-display { text-align: center; font-family: 'Orbitron', sans-serif; font-size: 2rem; margin-bottom: 40px; color: var(--gold-color); }
.choice-buttons { display: flex; gap: 20px; }
.choice-btn { font-size: 1.5rem; transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.3s ease; }
.split-btn { background: linear-gradient(90deg, #00c6ff, #0072ff); }
.steal-btn { background: linear-gradient(90deg, #ff4757, #e056fd); }
.choice-btn.selected { transform: scale(1.1) !important; box-shadow: 0 0 40px 5px currentColor; }
.choice-btn:hover { transform: translateY(-5px) scale(1.05); }

.result-card { background: var(--card-bg); border: 1px solid var(--border-color); border-radius: 20px; padding: 30px 40px; text-align: center; animation: resultFadeIn 0.8s cubic-bezier(0.25, 1, 0.5, 1); }
@keyframes resultFadeIn { from { opacity: 0; transform: scale(0.8); } to { opacity: 1; transform: scale(1); } }
.reveal-area { display: flex; justify-content: center; gap: 30px; margin-bottom: 30px; perspective: 1000px; }
.choice-reveal { width: 100px; height: 100px; display: flex; justify-content: center; align-items: center; border-radius: 15px; font-size: 3rem; font-weight: 700; transform-style: preserve-3d; position: relative; }
.choice-reveal::before { content: '?'; position: absolute; width: 100%; height: 100%; display: flex; justify-content: center; align-items: center; background: #444; border-radius: 15px; backface-visibility: hidden; -webkit-backface-visibility: hidden; }
.choice-reveal::after { content: attr(data-choice); position: absolute; width: 100%; height: 100%; display: flex; justify-content: center; align-items: center; border-radius: 15px; backface-visibility: hidden; -webkit-backface-visibility: hidden; transform: rotateY(180deg); }
.choice-reveal.split::after { background-color: var(--success-color); color: var(--bg-color); content: '🤝'; }
.choice-reveal.steal::after { background-color: var(--danger-color); color: white; content: '💀'; }
.player-reveal { animation: reveal 1.5s cubic-bezier(.5,-0.65,.5,1.55) forwards; animation-delay: 0.5s; }
.opponent-reveal { animation: reveal 1.5s cubic-bezier(.5,-0.65,.5,1.55) forwards; animation-delay: 1.5s; }
@keyframes reveal { 0% { transform: scale(0.8) rotateY(0deg); } 40% { transform: scale(1.1) rotateY(0deg); } 60% { transform: scale(1.1) rotateY(180deg); } 100% { transform: scale(1) rotateY(180deg); } }
#result-title { font-size: 2rem; margin-bottom: 10px; opacity: 0; animation: resultTextEnter 0.5s 2.5s forwards; }
#result-message { font-size: 1.1rem; color: var(--text-dim); margin-bottom: 30px; opacity: 0; animation: resultTextEnter 0.5s 2.7s forwards; }
#play-again-btn { opacity: 0; animation: resultTextEnter 0.5s 2.9s forwards; }
@keyframes resultTextEnter { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }