/* 儿童友好的专业音乐教学主题 */

/* 主色调 - 温和且专业 */
:root {
    /* 主色系 - 温和的蓝绿色，有助于专注 */
    --primary-color: #4dabf7;
    --primary-dark: #339af0;
    --primary-light: #74c0fc;
    
    /* 辅助色系 - 温暖且友好 */
    --secondary-color: #fd7e14;
    --success-color: #51cf66;
    --warning-color: #ffd43b;
    --danger-color: #ff6b6b;
    --info-color: #74c0fc;
    
    /* 背景色系 - 柔和护眼 */
    --body-bg: linear-gradient(135deg, #e3f2fd 0%, #f3e5f5 100%);
    --card-bg: rgba(255, 255, 255, 0.95);
    --light-bg: #f8f9ff;
    
    /* 边框和阴影 */
    --border-color: rgba(116, 192, 252, 0.3);
    --shadow-soft: 0 8px 32px rgba(77, 171, 247, 0.15);
    --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.08);
    
    /* 文字色彩 */
    --text-primary: #2d3748;
    --text-muted: #718096;
    --text-white: #ffffff;
    
    /* 音符颜色 */
    --note-high: #e53e3e;    /* 高音 - 红色 */
    --note-middle: #2d3748;  /* 中音 - 深灰 */
    --note-low: #3182ce;     /* 低音 - 蓝色 */
}

/* 整体页面背景 */
body {
    background: url('../images/music-background.jpg') no-repeat center center fixed,
                linear-gradient(135deg, rgba(227, 242, 253, 0.9) 0%, rgba(243, 229, 245, 0.9) 100%);
    background-size: cover;
    background-blend-mode: overlay;
    font-family: 'Comic Neue', 'Microsoft YaHei', 'PingFang SC', cursive, sans-serif;
    color: var(--text-primary);
}

/* 导航栏美化 */
.navbar {
    background: linear-gradient(45deg, rgba(77, 171, 247, 0.95), rgba(51, 154, 240, 0.95)) !important;
    box-shadow: var(--shadow-soft);
    border-bottom: 3px solid var(--primary-light);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
}

.navbar .header-content {
    line-height: 1.3;
}

.navbar .app-title {
    font-size: 1.4rem;
    font-weight: 700;
}

.navbar .welcome-message {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.9);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.4rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* 卡片美化 */
.card {
    background: rgba(255, 255, 255, 0.9);
    border: 2px solid var(--border-color);
    border-radius: 20px;
    box-shadow: var(--shadow-card);
    backdrop-filter: blur(15px);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 40px rgba(77, 171, 247, 0.2);
}

.card-header {
    background: linear-gradient(135deg, var(--primary-light), var(--info-color));
    border-radius: 18px 18px 0 0 !important;
    border-bottom: 2px solid var(--border-color);
    color: var(--text-white);
    font-weight: 600;
    padding: 1.2rem 1.5rem;
}

.card-header h5 {
    margin: 0;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.card-body {
    padding: 1.5rem;
}

/* 按钮美化 */
.btn {
    border-radius: 15px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color), #40c057);
    border-color: var(--success-color);
    color: var(--text-white);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.btn-success:hover {
    background: linear-gradient(135deg, #40c057, #37b24d);
    border-color: #37b24d;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-color: var(--primary-color);
}

.btn-outline-primary {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: rgba(77, 171, 247, 0.05);
}

.btn-outline-primary:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--text-white);
}

.btn-outline-warning {
    border-color: var(--warning-color);
    color: #f59f00;
    background: rgba(255, 212, 59, 0.05);
}

/* 生成按钮特殊样式 */
#generate-btn {
    background: linear-gradient(135deg, #ff6b6b, #ffd43b, #51cf66, #74c0fc);
    background-size: 300% 300%;
    animation: rainbow-gradient 3s ease infinite;
    border: none;
    color: var(--text-white);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

#generate-btn:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.25);
}

@keyframes rainbow-gradient {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* 表单控件美化 */
.form-control, .form-select {
    border-radius: 12px;
    border: 2px solid var(--border-color);
    background: rgba(255, 255, 255, 0.8);
    transition: all 0.3s ease;
    font-weight: 500;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(77, 171, 247, 0.25);
    background: rgba(255, 255, 255, 0.95);
}

/* 练习模式按钮组优化 */
.btn-check:checked + .btn-outline-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-color: var(--primary-color);
    color: #ffffff;
    box-shadow: 0 4px 16px rgba(77, 171, 247, 0.3);
    transform: translateY(-2px);
}

.btn-outline-primary {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    background: rgba(255, 255, 255, 0.9);
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-outline-primary:hover {
    background: rgba(77, 171, 247, 0.1);
    border-color: var(--primary-dark);
    transform: translateY(-1px);
}

.form-label {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.8rem;
}

/* 节拍器美化 */
.metronome-display {
    background: linear-gradient(135deg, rgba(116, 192, 252, 0.1), rgba(255, 255, 255, 0.8));
    border: 2px solid var(--border-color);
    border-radius: 15px;
    box-shadow: inset 0 2px 8px rgba(77, 171, 247, 0.1);
}

.beat-number {
    color: var(--primary-color);
    font-weight: 800;
    font-size: 22px;
}

.beat-dot {
    background: linear-gradient(135deg, #ddd, #bbb);
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.1);
}

.beat-dot.active {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    box-shadow: 0 2px 8px rgba(77, 171, 247, 0.4);
}

/* 警告框美化 */
.alert {
    border-radius: 15px;
    border: none;
    font-weight: 500;
    box-shadow: var(--shadow-card);
}

.alert-info {
    background: linear-gradient(135deg, rgba(116, 192, 252, 0.1), rgba(227, 242, 253, 0.8));
    color: var(--primary-dark);
    border-left: 4px solid var(--primary-color);
}

/* 帘子美化 - 纯色高不透明度 */
.music-curtain {
    background: rgba(74, 144, 226, 0.98);
    backdrop-filter: blur(15px);
}

.curtain-content .btn {
    background: rgba(255, 255, 255, 0.9);
    color: var(--primary-dark);
    border: 2px solid rgba(255, 255, 255, 0.5);
    font-weight: 700;
}

.curtain-content .btn:hover {
    background: rgba(255, 255, 255, 1);
    transform: translateY(-2px) scale(1.05);
}

/* 响应式优化 */
@media (max-width: 768px) {
    .card {
        margin: 0.5rem;
        border-radius: 15px;
    }
    
    .btn {
        border-radius: 12px;
    }
    
    #generate-btn {
        padding: 1rem 2rem !important;
    }
    
    .navbar-brand {
        font-size: 1.2rem;
    }
}

/* 对照模式上下布局样式 */
.dual-top {
    margin-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 1rem;
}

.dual-bottom {
    margin-top: 1rem;
    padding-top: 1rem;
}

/* 高音低音颜色 */
.note-high {
    color: var(--note-high) !important;
    font-weight: 700;
}

.note-low {
    color: var(--note-low) !important;
    font-weight: 700;
}

.note-middle {
    color: var(--note-middle) !important;
    font-weight: 600;
}

/* 高低音点样式 */
.high-dot {
    position: relative;
    top: -0.8em;
    font-size: 0.5em;
    color: var(--note-high);
}

.low-dot {
    position: relative;
    bottom: -0.8em;
    font-size: 0.5em;
    color: var(--note-low);
}

/* 简化的单位拍框线样式 */
.beat-group {
    display: inline-block;
    margin: 4px;
    padding: 8px;
    border: 2px solid #666;
    border-radius: 8px;
    background: transparent;
}

/* 简谱音符增大样式 */
.numbered-note {
    font-size: 36px !important;
    font-weight: bold !important;
    min-width: 50px;
    min-height: 50px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin: 2px;
    padding: 4px;
    border: none;
    background: transparent;
}

/* 版权信息美化 */
footer {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--text-white);
    box-shadow: 0 -4px 20px rgba(77, 171, 247, 0.2);
}

footer small {
    font-weight: 500;
    opacity: 0.9;
}

/* 五彩光边框闪烁动画 */
@keyframes rainbow-glow {
    0% { 
        border-color: #ff4444;
        box-shadow: 0 0 20px #ff4444, 0 0 40px #ff4444;
    }
    16.66% { 
        border-color: #ff8844;
        box-shadow: 0 0 20px #ff8844, 0 0 40px #ff8844;
    }
    33.33% { 
        border-color: #ffff44;
        box-shadow: 0 0 20px #ffff44, 0 0 40px #ffff44;
    }
    50% { 
        border-color: #44ff44;
        box-shadow: 0 0 20px #44ff44, 0 0 40px #44ff44;
    }
    66.66% { 
        border-color: #4444ff;
        box-shadow: 0 0 20px #4444ff, 0 0 40px #4444ff;
    }
    83.33% { 
        border-color: #8844ff;
        box-shadow: 0 0 20px #8844ff, 0 0 40px #8844ff;
    }
    100% { 
        border-color: #ff4444;
        box-shadow: 0 0 20px #ff4444, 0 0 40px #ff4444;
    }
}

/* 乐谱容器五彩闪烁效果 */
.score-container.beat-flash {
    animation: rainbow-glow 0.3s ease-in-out;
    border: 3px solid #ff4444;
}

.score-container.strong-beat-flash {
    animation: rainbow-glow 0.5s ease-in-out;
    border: 4px solid #ff4444;
}