.coin-display {
    font-size: 120px;
    transition: transform 0.1s;
}

.coin-flip {
    animation: flip 0.2s ease-in-out;
}

@keyframes flip {
    0% { transform: rotateY(0deg); }
    50% { transform: rotateY(180deg); }
    100% { transform: rotateY(360deg); }
}

body {
    background: linear-gradient(135deg, #f5f3ef 0%, #e8e4d9 50%, #d4cfc4 100%);
    min-height: 100vh;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.card {
    border: none;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    border-radius: 12px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.16);
}

.card-header {
    background: linear-gradient(135deg, #2c5f2d 0%, #3e7d3f 100%);
    color: white;
    border-radius: 12px 12px 0 0 !important;
}

.btn-primary {
    background: linear-gradient(135deg, #2c5f2d 0%, #3e7d3f 100%);
    border: none;
    box-shadow: 0 4px 12px rgba(44, 95, 45, 0.4);
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #1e431f 0%, #2d5a2e 100%);
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(44, 95, 45, 0.5);
}

.btn-danger {
    background: linear-gradient(135deg, #8b2635 0%, #a4161a 100%);
    border: none;
    box-shadow: 0 4px 12px rgba(139, 38, 53, 0.4);
    transition: all 0.3s ease;
}

.btn-danger:hover {
    background: linear-gradient(135deg, #6b1f2a 0%, #8b151a 100%);
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(139, 38, 53, 0.5);
}

.progress-bar {
    background: linear-gradient(90deg, #2c5f2d 0%, #52b788 100%);
}

.alert-info {
    background: linear-gradient(135deg, #e8f5e9 0%, #c8e6c9 100%);
    border-color: #a5d6a7;
    color: #1b5e20;
}

.form-range::-webkit-slider-thumb {
    background: linear-gradient(135deg, #2c5f2d 0%, #3e7d3f 100%);
}

.form-range::-moz-range-thumb {
    background: linear-gradient(135deg, #2c5f2d 0%, #3e7d3f 100%);
}