/* 随机答案之书 - 淡绿色清新风格样式（与随机唱歌音频一致） */

/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #a8e6cf 0%, #dcedc1 50%, #ffd3a5 100%);
    min-height: 100vh;
    color: #2d5016;
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
}

/* 头部 */
.header {
    text-align: center;
    margin-bottom: 20px;
    background: rgba(255, 255, 255, 0.85);
    border-radius: 20px;
    padding: 24px;
    box-shadow: 0 8px 25px rgba(45, 80, 22, 0.08);
    backdrop-filter: blur(10px);
}

.header h1 {
    font-size: 2rem;
    color: #2d5016;
    margin-bottom: 10px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.header p {
    color: #5a7c65;
    font-size: 1rem;
}

/* 按钮 */
.btn {
    background: linear-gradient(135deg, #81c784 0%, #66bb6a 100%);
    color: white;
    border: none;
    padding: 10px 18px;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s ease;
    box-shadow: 0 4px 12px rgba(129, 199, 132, 0.35);
    text-decoration: none;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(129, 199, 132, 0.45);
}

/* 加载与错误 */
.loading, .error {
    text-align: center;
    padding: 30px;
    background: rgba(255, 255, 255, 0.85);
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(45, 80, 22, 0.08);
}

.spinner {
    width: 36px;
    height: 36px;
    border: 4px solid #e8f5e8;
    border-top: 4px solid #81c784;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 18px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 动画 */
.fade-in {
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 答案卡片 */
.answer-card {
    background: rgba(255, 255, 255, 0.9);
    padding: 16px;
    border-radius: 15px;
    box-shadow: 0 4px 18px rgba(45, 80, 22, 0.08);
    margin-bottom: 15px;
    text-align: center;
}

.answer-text {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: #1b5e20;
    word-break: break-word;
}

.answer-en {
    color: #5a7c65;
    font-size: 1rem;
    margin-bottom: 10px;
}

.meta {
    color: #5a7c65;
    font-size: 0.95rem;
}

.actions {
    display: flex;
    gap: 12px;
    align-items: center;
    justify-content: center;
    margin-top: 12px;
}

/* 手机端优先优化 */
@media (max-width: 767px) {
    .container { padding: 12px; }
    .header { padding: 18px; }
    .header h1 { font-size: 1.6rem; gap: 8px; }

    .answer-card { padding: 16px; }
    .answer-text { font-size: 1.3rem; }
    .answer-en { font-size: 0.95rem; }

    .actions {
        flex-direction: column;
        gap: 15px;
    }

    .btn {
        width: 100%;
        max-width: 220px;
        text-align: center;
    }
}