/* 默认样式（日间模式） */
.rng-container {
    background-color: #ffffff;
    color: #333333;
    margin: 20px auto;
    padding: 15px;
    width: 100%;
    max-width: 600px;
    box-sizing: border-box;
    text-align: center;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
.rng-header {
    margin-bottom: 15px;
}
.rng-container h2 {
    font-size: clamp(1.4rem, 3vw, 2rem);
    margin: 0;
    line-height: 1.4;
    color: #333333;
}
.rng-button-group {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
}
.rng-container button.rng-btn {
    border: none;
    padding: 12px 20px;
    font-size: clamp(1rem, 2vw, 1.2rem);
    font-weight: 500;
    cursor: pointer;
    border-radius: 6px;
    flex: 1;
    min-width: 120px;
    max-width: 200px;
    transition: background-color 0.3s ease, transform 0.1s ease;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
    line-height: 1.5;
}
.rng-container button.rng-btn.rng-btn-add,
.rng-container button.rng-btn.rng-btn-remove,
.rng-container button.rng-btn.rng-btn-reroll {
    background-color: #e74c3c;
    color: #ffffff;
}
.rng-container button.rng-btn.rng-toggle-btn {
    background-color: #3498db;
    color: #ffffff;
}
.rng-container button.rng-btn.rng-btn-add:hover,
.rng-container button.rng-btn.rng-btn-remove:hover,
.rng-container button.rng-btn.rng-btn-reroll:hover {
    background-color: #c0392b;
    transform: translateY(-1px);
}
.rng-container button.rng-btn.rng-toggle-btn:hover {
    background-color: #2980b9;
    transform: translateY(-1px);
}
.rng-container button.rng-btn:disabled {
    background-color: #d3d3d3;
    color: #7f8c8d;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}
.rng-result {
    background-color: #f0f0f0;
    padding: 15px;
    border-radius: 10px;
    margin-top: 15px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
}
.rng-slot {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    min-width: 50px;
}
.rng-letter {
    color: #c0392b;
    font-weight: bold;
    font-size: clamp(1rem, 2vw, 1.2rem);
    margin-bottom: 5px;
    line-height: 1.5;
}
.rng-number {
    background-color: #b0c4de;
    padding: 8px;
    border-radius: 5px;
    width: 30px;
    text-align: center;
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: #333333;
    will-change: transform;
    line-height: 1.5;
}
.rng-scrolling .rng-number {
    animation: rng-scroll 2s ease-in-out forwards;
}
@keyframes rng-scroll {
    0% { transform: translateY(-100px); opacity: 0.3; }
    50% { transform: translateY(20px); opacity: 0.7; }
    100% { transform: translateY(0); opacity: 1; }
}

/* 夜间模式（html.theme-dark） */
html.theme-dark .rng-container {
    background-color: #1a1a1a;
    color: #ffffff;
    box-shadow: none;
}
html.theme-dark .rng-container h2 {
    color: #ffffff;
}
html.theme-dark .rng-result {
    background-color: #2c2c2c;
}
html.theme-dark .rng-letter {
    color: #e74c3c;
}
html.theme-dark .rng-number {
    background-color: #34495e;
    color: #ffffff;
}
html.theme-dark .rng-container button.rng-btn.rng-btn-add,
html.theme-dark .rng-container button.rng-btn.rng-btn-remove,
html.theme-dark .rng-container button.rng-btn.rng-btn-reroll {
    background-color: #e74c3c;
}
html.theme-dark .rng-container button.rng-btn.rng-toggle-btn {
    background-color: #3498db;
}
html.theme-dark .rng-container button.rng-btn.rng-btn-add:hover,
html.theme-dark .rng-container button.rng-btn.rng-btn-remove:hover,
html.theme-dark .rng-container button.rng-btn.rng-btn-reroll:hover {
    background-color: #c0392b;
}
html.theme-dark .rng-container button.rng-btn.rng-toggle-btn:hover {
    background-color: #2980b9;
}
html.theme-dark .rng-container button.rng-btn:disabled {
    background-color: #7f8c8d;
    color: #d3d3d3;
}

/* 移动端 */
@media (max-width: 600px) {
    .rng-container h2 {
        font-size: clamp(1.4rem, 3vw, 1.6rem);
    }
    .rng-container button.rng-btn {
        padding: 10px 15px;
        font-size: clamp(1rem, 2vw, 1.1rem);
        min-width: 100px;
    }
    .rng-result {
        padding: 10px;
        gap: 8px;
    }
    .rng-slot {
        min-width: 40px;
    }
    .rng-letter {
        font-size: clamp(1rem, 2vw, 1.1rem);
    }
    .rng-number {
        width: 25px;
        padding: 6px;
        font-size: clamp(1rem, 2vw, 1.1rem);
    }
    @keyframes rng-scroll {
        0% { transform: translateY(-60px); opacity: 0.3; }
        50% { transform: translateY(15px); opacity: 0.7; }
        100% { transform: translateY(0); opacity: 1; }
    }
}

/* 大屏 */
@media (min-width: 1200px) {
    .rng-container h2 {
        font-size: clamp(1.8rem, 3vw, 2.2rem);
    }
    .rng-container button.rng-btn {
        font-size: clamp(1.1rem, 2vw, 1.3rem);
    }
    .rng-letter {
        font-size: clamp(1.1rem, 2vw, 1.3rem);
    }
    .rng-number {
        font-size: clamp(1.1rem, 2vw, 1.3rem);
    }
}