/* ===== 带标签的按钮容器 ===== */
.btn-with-label {
    position: fixed;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
    z-index: 1000;
}
.btn-with-label .btn-label {
    font-size: 0.7rem;
    color: var(--antique-gold);
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.8);
    white-space: nowrap;
    opacity: 0.9;
}

/* 按钮定位 */
.fullscreen-label-wrapper { top: 20px; right: 20px; }
.audio-label-wrapper { bottom: 20px; right: 20px; }
.answer-card-label-wrapper { bottom: 20px; left: 20px; }
.submit-label-wrapper { bottom: 20px; left: 20px; }

/* ===== 通用按钮样式 ===== */
.fullscreen-btn, .audio-control, .answer-card-btn, .submit-corner-btn {
    width: 50px; height: 50px;
    background: rgba(201, 162, 39, 0.2);
    border: 2px solid var(--antique-gold);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--antique-gold);
    transition: all 0.3s ease;
}
.fullscreen-btn:hover, .audio-control:hover, .answer-card-btn:hover, .submit-corner-btn:hover {
    background: rgba(201, 162, 39, 0.4);
    transform: scale(1.1);
}
.fullscreen-btn { font-size: 1.5rem; }
.audio-control.muted { opacity: 0.5; }

/* ===== 弹窗通用样式 ===== */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 2000;
    justify-content: center;
    align-items: center;
}
.modal-overlay.show { display: flex; }

.modal-content {
    background: var(--deep-indigo);
    padding: 2rem;
    border-radius: 20px;
    border: 2px solid var(--antique-gold);
    max-width: 500px;
    width: 90%;
    position: relative;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-close {
    position: absolute;
    top: 10px; right: 15px;
    background: none;
    border: none;
    color: var(--antique-gold);
    font-size: 1.5rem;
    cursor: pointer;
}

.modal-title {
    color: var(--antique-gold);
    text-align: center;
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
}

/* ===== 表单通用样式 ===== */
.form-group {
    margin-bottom: 1rem;
}
.form-group label {
    display: block;
    margin-bottom: 0.3rem;
    color: var(--antique-gold);
    font-size: 0.9rem;
    font-weight: 600;
}
.form-group input, .form-group textarea {
    width: 100%;
    padding: 0.7rem 1rem;
    border: 1px solid var(--antique-gold);
    border-radius: 10px;
    background: rgba(26, 26, 46, 0.5);
    color: var(--cream);
    font-size: 0.95rem;
}
.form-group input::placeholder {
    color: rgba(245, 245, 220, 0.4);
}

/* ===== 主按钮样式 ===== */
.primary-btn {
    padding: 1rem 3rem;
    font-size: 1.2rem;
    font-family: 'Noto Sans SC', sans-serif;
    font-weight: 500;
    color: var(--deep-indigo);
    background: linear-gradient(135deg, var(--nailong-yellow) 0%, var(--antique-gold) 100%);
    border: none;
    border-radius: 50px;
    cursor: pointer;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(255, 217, 61, 0.3), 0 0 30px rgba(201, 162, 39, 0.2);
}
.primary-btn:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 8px 25px rgba(255, 217, 61, 0.4), 0 0 50px rgba(201, 162, 39, 0.3);
}

.secondary-btn {
    padding: 0.8rem 2rem;
    background: transparent;
    border: 1px solid var(--antique-gold);
    border-radius: 25px;
    color: var(--antique-gold);
    cursor: pointer;
    transition: all 0.3s ease;
}
.secondary-btn:hover {
    background: var(--antique-gold);
    color: var(--deep-indigo);
}

/* ===== 答题卡弹窗 ===== */
.answer-card-modal {
    display: none;
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 2000;
    justify-content: center;
    align-items: center;
}
.answer-card-content {
    background: var(--deep-indigo);
    padding: 2rem;
    border-radius: 20px;
    border: 2px solid var(--antique-gold);
    max-width: 500px;
    width: 90%;
    position: relative;
}
.answer-card-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 10px;
}
.answer-card-cell {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(201, 162, 39, 0.1);
    border: 2px solid var(--antique-gold);
    border-radius: 10px;
    color: var(--cream);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}
.answer-card-cell:hover { background: rgba(201, 162, 39, 0.3); transform: scale(1.1); }
.answer-card-cell.current { background: var(--nailong-yellow); color: var(--deep-indigo); border-color: var(--nailong-yellow); font-weight: 700; }
.answer-card-cell.answered { background: rgba(0, 200, 0, 0.2); border-color: #90EE90; }