/* ========================================
   AI 探险家 - 组件样式 (v5.0)
   ======================================== */

/* ========================================
   按钮组件 - 温暖风
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-family: var(--font-cn);
    font-size: 14px;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-normal);
    text-decoration: none;
    letter-spacing: 0.5px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    box-shadow: 0 4px 15px rgba(255, 107, 107, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(255, 107, 107, 0.4);
}

.btn-primary:active { transform: translateY(0); }

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-secondary {
    background: var(--warm-card);
    color: var(--text-primary);
    border: 2px solid var(--warm-border);
}

.btn-secondary:hover {
    border-color: var(--primary-light);
    background: rgba(255, 107, 107, 0.04);
}

.btn-secondary:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-back {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: var(--transition-normal);
    font-family: var(--font-cn);
}

.btn-back:hover {
    color: var(--primary);
    background: rgba(255, 107, 107, 0.06);
}

.btn-icon { font-size: 16px; }

/* ========================================
   课程卡片 - 支持动态主题颜色
   ======================================== */
.level-card {
    position: relative;
    background: var(--warm-card);
    border-radius: var(--radius-lg);
    padding: 24px;
    border: 2px solid var(--warm-border);
    cursor: pointer;
    transition: var(--transition-normal);
    overflow: hidden;
}

.level-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: var(--level-card-gradient, linear-gradient(90deg, var(--primary), var(--secondary)));
    opacity: 0;
    transition: var(--transition-normal);
}

.level-card:hover {
    transform: translateY(-4px);
    border-color: var(--level-card-primary-light, var(--primary-light));
    box-shadow: 0 8px 32px var(--level-card-glow, rgba(255, 107, 107, 0.16));
}

.level-card:hover::before { opacity: 1; }

.level-card.locked {
    opacity: 0.5;
    cursor: not-allowed;
}

.level-card.locked:hover {
    transform: none;
    box-shadow: none;
}

.level-card.completed {
    border-color: var(--success);
}

.level-card.completed::before {
    opacity: 1;
    background: linear-gradient(90deg, var(--success), var(--secondary));
}

.level-card.theme-colored {
    border-color: var(--level-card-border, var(--warm-border));
}

.level-card.theme-colored:hover {
    border-color: var(--level-card-primary, var(--primary));
}

.level-card.theme-colored .btn-start-level {
    background: var(--level-card-gradient, linear-gradient(135deg, var(--primary), var(--primary-light)));
}

.level-status {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    background: var(--warm-bg);
}

.level-status.completed {
    background: rgba(0, 184, 148, 0.15);
}

.level-status.locked {
    background: rgba(255, 118, 117, 0.1);
}

.level-header {
    display: flex;
    gap: 14px;
    margin-bottom: 14px;
    align-items: flex-start;
}

.level-icon {
    font-size: 36px;
    flex-shrink: 0;
}

.level-info { flex: 1; }

.level-title {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
    line-height: 1.4;
}

.level-description {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.level-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 16px;
}

.level-meta-item {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 12px;
    color: var(--text-muted);
}

.level-meta-item span:first-child { font-size: 14px; }

.level-actions {
    padding-top: 12px;
    border-top: 1px solid var(--warm-border);
}

.btn-start-level {
    width: 100%;
    padding: 12px 20px;
    font-size: 15px;
    border-radius: var(--radius-md);
    box-shadow: 0 4px 15px var(--level-card-glow, rgba(255, 107, 107, 0.3));
}

.btn-start-level:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px var(--level-card-glow, rgba(255, 107, 107, 0.4));
}

.level-title.theme-colored {
    color: var(--level-card-primary-dark, var(--text-primary));
}

.level-status.theme-colored {
    background: var(--level-card-bg-decoration, rgba(255, 107, 107, 0.06));
}

.level-card.theme-colored .level-title {
    color: var(--level-card-primary-dark, var(--text-primary));
}

/* ========================================
   响应式
   ======================================== */
@media (max-width: 768px) {
    .level-card { padding: 18px; }
    .levels-grid { grid-template-columns: 1fr; }
    .btn-start { padding: 14px 36px !important; font-size: 16px !important; }
}

/* ========================================
   TTS 语音播报控制栏
   ======================================== */
.tts-control-bar {
    background: linear-gradient(135deg, rgba(255, 107, 107, 0.12), rgba(255, 193, 7, 0.08));
    border: 1px solid rgba(255, 107, 107, 0.35);
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    overflow: hidden;
    animation: ttsSlideIn 0.3s ease;
    position: relative;
    z-index: 1000;
    min-height: 50px;
}

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

.tts-main {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 15px;
    background: rgba(0, 0, 0, 0.25);
}

.tts-icon-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 107, 107, 0.15);
    border: 1px solid rgba(255, 107, 107, 0.4);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 18px;
    line-height: 1;
    padding: 0;
    color: var(--primary);
    min-width: 36px;
}

.tts-icon-btn:hover:not(:disabled) {
    background: rgba(255, 107, 107, 0.35);
    border-color: var(--primary);
    transform: scale(1.08);
    box-shadow: 0 0 15px rgba(255, 107, 107, 0.3);
}

.tts-icon-btn:active:not(:disabled) {
    transform: scale(0.95);
}

.tts-icon-btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

.tts-icon-btn.tts-play-btn {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    font-weight: bold;
    border-color: var(--primary);
    box-shadow: 0 0 12px rgba(255, 107, 107, 0.4);
}

.tts-icon-btn.tts-play-btn:hover:not(:disabled) {
    background: linear-gradient(135deg, #ff6b6b, #ff8e53);
    box-shadow: 0 0 20px rgba(255, 107, 107, 0.6);
}

.tts-status-mini {
    font-size: 12px;
    color: var(--text-muted);
    padding: 2px 8px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 4px;
}

.tts-status-mini.tts-status-playing {
    color: var(--success);
    background: rgba(76, 175, 80, 0.12);
}

.tts-status-mini.tts-status-paused {
    color: var(--warning, #ffc107);
    background: rgba(255, 193, 7, 0.12);
}

.tts-status-mini.tts-status-ended {
    color: var(--primary);
    background: rgba(255, 107, 107, 0.12);
}

.tts-status-mini.tts-status-error {
    color: var(--danger);
    background: rgba(244, 67, 54, 0.12);
}

.tts-spacer {
    flex: 1;
}

.tts-auto-play-label {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    color: var(--text-muted);
    cursor: pointer;
}

.tts-auto-play-label input[type="checkbox"] {
    width: 14px;
    height: 14px;
    cursor: pointer;
}

.tts-close-btn {
    margin-left: auto;
}