/* ====================================
   ELearning - 基于小熊健身色彩系统
   ==================================== */

/* ====================================
   1. CSS 变量定义
   ==================================== */

:root {
    /* 品牌核心色 */
    --brand-bear-brown: #C58A56;
    --brand-outline: #5A3E28;
    --brand-orange: #F36A38;
    --brand-pink: #F2A4A0;
    
    /* 系统主色 */
    --primary-orange: #FF7A45;
    --primary-orange-light: #FFE3D3;
    --primary-orange-hover: #FF9D78;
    --primary-orange-disabled: #FFD9C7;
    --soft-yellow: #FFF6D1;
    
    /* 辅助色 */
    --fitness-blue: #5A90FF;
    --mint-green: #6CD9A3;
    --soft-lavender: #C8B6FF;
    
    /* 中性色 - 背景 */
    --bg-cream: #FFF9F3;
    --bg-white: #FFFFFF;
    --bg-warm-grey: #F4EFEA;
    
    /* 中性色 - 文字 */
    --text-title: #2A2A2A;
    --text-body: #5F5F5F;
    --text-caption: #9A9A9A;
    --border-line: #E8E2DC;
    
    /* 语义色 */
    --success-color: #6CD9A3;
    --warning-color: #FFBE55;
    --error-color: #FF6B6B;
    
    /* UI 规范 */
    --card-radius: 20px;
    --button-radius: 12px;
    --shadow-soft: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-medium: 0 8px 24px rgba(0, 0, 0, 0.12);
}

/* ====================================
   2. 全局样式
   ==================================== */

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, 
                 "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
    background-color: var(--bg-cream);
    color: var(--text-body);
    min-height: 100vh;
    padding-bottom: 2rem;
    line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--text-title);
    font-weight: 600;
}

/* ====================================
   3. 导航栏
   ==================================== */

.navbar {
    background: var(--bg-cream) !important;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    border-bottom: 1px solid var(--border-line);
}

.navbar-brand {
    font-weight: 700;
    color: var(--primary-orange) !important;
    font-size: 1.25rem;
}

.navbar-brand:hover {
    color: var(--primary-orange-hover) !important;
}

.nav-link {
    color: var(--text-caption) !important;
    font-weight: 500;
    transition: all 0.3s ease;
    border-radius: 8px;
    padding: 0.5rem 1rem !important;
}

.nav-link:hover {
    color: var(--primary-orange) !important;
    background: var(--primary-orange-light);
}

.nav-link.active {
    color: var(--primary-orange) !important;
    background: var(--primary-orange-light);
}

/* ====================================
   4. 卡片样式
   ==================================== */

.card {
    border: none;
    border-radius: var(--card-radius);
    box-shadow: var(--shadow-soft);
    background: var(--bg-white);
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: var(--shadow-medium);
    transform: translateY(-2px);
}

.card-title {
    color: var(--text-title);
    font-weight: 600;
}

.card-body {
    padding: 1.5rem;
}

/* ====================================
   5. 按钮样式
   ==================================== */

/* Primary 主按钮 */
.btn-primary {
    background: var(--primary-orange) !important;
    border: none !important;
    color: var(--bg-white) !important;
    border-radius: var(--button-radius);
    font-weight: 600;
    padding: 0.625rem 1.5rem;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background: var(--primary-orange-hover) !important;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 122, 69, 0.3);
}

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

.btn-primary:disabled {
    background: var(--primary-orange-disabled) !important;
    transform: none;
}

/* Secondary 次按钮 */
.btn-secondary {
    background: var(--primary-orange-light) !important;
    border: none !important;
    color: var(--primary-orange) !important;
    border-radius: var(--button-radius);
    font-weight: 600;
}

.btn-secondary:hover {
    background: var(--primary-orange-disabled) !important;
    color: var(--primary-orange-hover) !important;
}

/* Outline 按钮 */
.btn-outline-primary {
    border: 2px solid var(--primary-orange) !important;
    color: var(--primary-orange) !important;
    border-radius: var(--button-radius);
    font-weight: 600;
    background: transparent;
}

.btn-outline-primary:hover {
    background: var(--primary-orange) !important;
    color: var(--bg-white) !important;
}

/* Success 按钮 */
.btn-success {
    background: var(--success-color) !important;
    border: none !important;
    color: var(--bg-white) !important;
    border-radius: var(--button-radius);
}

.btn-success:hover {
    background: #5BC990 !important;
}

/* Warning 按钮 */
.btn-warning {
    background: var(--warning-color) !important;
    border: none !important;
    color: var(--text-title) !important;
    border-radius: var(--button-radius);
}

.btn-warning:hover {
    background: #FFD073 !important;
}

/* Danger 按钮 */
.btn-danger {
    background: var(--error-color) !important;
    border: none !important;
    color: var(--bg-white) !important;
    border-radius: var(--button-radius);
}

/* ====================================
   6. 训练模块卡片
   ==================================== */

.module-card {
    border-radius: var(--card-radius);
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.module-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
}

.module-card.running {
    border-color: var(--primary-orange);
    background: linear-gradient(135deg, var(--bg-white) 0%, var(--soft-yellow) 100%);
}

.module-card.completed {
    border-color: var(--success-color);
    background: linear-gradient(135deg, var(--bg-white) 0%, #E8F9F0 100%);
}

.module-card.locked {
    opacity: 0.7;
    background: var(--bg-warm-grey);
}

.module-icon {
    font-size: 2rem;
    display: inline-block;
    margin-right: 0.5rem;
}

.module-status-badge .badge {
    border-radius: 20px;
    padding: 0.375rem 0.875rem;
    font-weight: 600;
}

.badge.bg-primary {
    background: var(--primary-orange) !important;
}

.badge.bg-success {
    background: var(--success-color) !important;
}

.badge.bg-secondary {
    background: var(--text-caption) !important;
}

.badge.bg-danger {
    background: var(--error-color) !important;
}

/* ====================================
   7. 进度条
   ==================================== */

.progress {
    background: var(--bg-warm-grey);
    border-radius: 10px;
    overflow: hidden;
}

.progress-bar {
    background: var(--primary-orange);
    transition: width 0.3s ease;
}

.progress-bar.bg-success {
    background: var(--success-color) !important;
}

.progress-bar.bg-primary {
    background: var(--primary-orange) !important;
}

.progress-bar.bg-danger {
    background: var(--error-color) !important;
}

/* 自定义音频进度条 */
.form-range {
    height: 8px;
    border-radius: 10px;
    background: var(--bg-warm-grey);
    outline: none;
    -webkit-appearance: none;
}

.form-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-orange);
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(255, 122, 69, 0.4);
    border: 3px solid var(--bg-white);
    transition: all 0.2s ease;
}

.form-range::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 4px 12px rgba(255, 122, 69, 0.5);
}

.form-range::-webkit-slider-thumb:active {
    transform: scale(1.1);
}

.form-range::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-orange);
    cursor: pointer;
    border: 3px solid var(--bg-white);
    box-shadow: 0 2px 8px rgba(255, 122, 69, 0.4);
}

.form-range::-webkit-slider-runnable-track {
    background: var(--primary-orange);
    height: 8px;
    border-radius: 10px;
}

/* ====================================
   8. Alert 提示
   ==================================== */

.alert {
    border: none;
    border-radius: 12px;
    padding: 1rem 1.25rem;
}

.alert-info {
    background: linear-gradient(135deg, #E6F0FF 0%, #F0F7FF 100%);
    color: var(--fitness-blue);
    border-left: 4px solid var(--fitness-blue);
}

.alert-success {
    background: linear-gradient(135deg, #E8F9F0 0%, #F0FDF4 100%);
    color: #059669;
    border-left: 4px solid var(--success-color);
}

.alert-warning {
    background: linear-gradient(135deg, #FFF8E6 0%, #FFFBF0 100%);
    color: #D97706;
    border-left: 4px solid var(--warning-color);
}

.alert-danger {
    background: linear-gradient(135deg, #FFEBEE 0%, #FFF5F5 100%);
    color: #DC2626;
    border-left: 4px solid var(--error-color);
}

/* ====================================
   9. 自定义音频控制
   ==================================== */

.custom-audio-controls {
    background: var(--bg-white);
    border: 2px solid var(--border-line) !important;
    border-radius: 16px;
    padding: 1.25rem !important;
}

.custom-audio-controls .btn-primary {
    background: var(--primary-orange) !important;
    border: none !important;
    min-width: 56px;
    width: 56px;
    height: 56px;
    border-radius: 50% !important;
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    padding: 0 !important;
    flex-shrink: 0;
}

.custom-audio-controls .btn-primary i {
    font-size: 24px;
    margin: 0;
    padding: 0;
}

.custom-audio-controls .btn-primary:hover {
    background: var(--primary-orange-hover) !important;
    box-shadow: 0 4px 12px rgba(255, 122, 69, 0.3);
}

.custom-audio-controls .btn-group-sm .btn {
    background: var(--bg-warm-grey);
    border: none;
    color: var(--text-body);
    border-radius: 8px;
    font-size: 0.875rem;
    padding: 0.375rem 0.75rem;
    font-weight: 600;
}

.custom-audio-controls .btn-group-sm .btn.active {
    background: var(--primary-orange);
    color: var(--bg-white);
}

.custom-audio-controls .btn-group-sm .btn:hover {
    background: var(--primary-orange-light);
    color: var(--primary-orange);
}

.audio-time {
    color: var(--text-body);
    font-weight: 600;
    font-size: 0.9375rem;
    min-width: 110px;
}

/* ====================================
   10. 计时器显示 - 简洁版
   ==================================== */

/* 紧凑计时器 */
.timer-compact {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.9375rem;
}

.timer-compact .timer-label {
    color: var(--text-caption);
    font-size: 0.8125rem;
    font-weight: 500;
}

.timer-compact .timer-value {
    color: var(--text-title);
    font-weight: 700;
    font-size: 1.125rem;
    font-variant-numeric: tabular-nums;
    font-family: 'Courier New', monospace;
}

.timer-compact .text-success {
    color: var(--success-color) !important;
}

.timer-divider {
    width: 1px;
    height: 20px;
    background: var(--border-line);
}

/* 旧版大卡片计时器（保留作为备用） */
.timer-display-large {
    background: linear-gradient(135deg, var(--soft-yellow) 0%, var(--primary-orange-light) 100%);
    border-radius: 16px;
    padding: 1.5rem;
    text-align: center;
    box-shadow: var(--shadow-soft);
}

.timer-display-large .timer-label {
    color: var(--text-caption);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.timer-display-large .timer-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-orange);
    font-variant-numeric: tabular-nums;
}

.daily-timer-display {
    text-align: right;
}

.daily-timer-display .timer-label {
    font-size: 0.75rem;
    color: var(--text-caption);
}

.daily-timer-display .timer-value {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--primary-orange);
}

/* ====================================
   11. Toast 提示
   ==================================== */

.toast {
    border: none;
    border-radius: 12px;
    box-shadow: var(--shadow-medium);
}

.toast-header {
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-line);
    border-radius: 12px 12px 0 0;
    color: var(--text-title);
    font-weight: 600;
}

.toast-body {
    background: var(--bg-white);
    color: var(--text-body);
}

/* ====================================
   12. 离线提示
   ==================================== */

.offline-indicator {
    position: fixed;
    top: 70px;
    right: 20px;
    background: var(--error-color);
    color: var(--bg-white);
    padding: 0.75rem 1.25rem;
    border-radius: 12px;
    box-shadow: var(--shadow-medium);
    z-index: 9999;
    font-weight: 600;
    animation: slideInRight 0.3s ease;
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* ====================================
   13. 文本样式
   ==================================== */

.text-primary {
    color: var(--primary-orange) !important;
}

.text-muted {
    color: var(--text-caption) !important;
}

.text-success {
    color: var(--success-color) !important;
}

.text-warning {
    color: var(--warning-color) !important;
}

.text-danger {
    color: var(--error-color) !important;
}

.small {
    font-size: 0.875rem;
}

/* ====================================
   14. 工具类
   ==================================== */

.shadow-sm {
    box-shadow: var(--shadow-soft) !important;
}

.shadow {
    box-shadow: var(--shadow-medium) !important;
}

.rounded {
    border-radius: var(--button-radius) !important;
}

.rounded-lg {
    border-radius: var(--card-radius) !important;
}

/* ====================================
   15. 响应式设计
   ==================================== */

@media (max-width: 768px) {
    .timer-value {
        font-size: 2rem;
    }
    
    .daily-timer-display .timer-value {
        font-size: 1.5rem;
    }
    
    .module-icon {
        font-size: 1.5rem;
    }
    
    .card-body {
        padding: 1rem;
    }
}

@media (max-width: 576px) {
    body {
        padding-bottom: 1rem;
    }
    
    .navbar-brand {
        font-size: 1.125rem;
    }
    
    .timer-value {
        font-size: 1.75rem;
    }
    
    .btn {
        font-size: 0.875rem;
    }
}

/* ====================================
   16. 动画效果
   ==================================== */

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

.card,
.alert,
.module-card {
    animation: fadeIn 0.4s ease;
}

/* ====================================
   17. 自定义滚动条
   ==================================== */

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-warm-grey);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: var(--text-caption);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-orange);
}

/* ====================================
   18. Toast 通知系统
   ==================================== */

#toast-container {
    pointer-events: none;
    max-width: 100vw;
}

#toast-container .toast {
    pointer-events: auto;
    margin-bottom: 12px;
    opacity: 0;
    transform: translateX(100%);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

#toast-container .toast.show {
    opacity: 1;
    transform: translateX(0);
}

/* Toast 响应式 */
@media (max-width: 576px) {
    #toast-container {
        left: 0;
        right: 0;
        padding: 0.75rem !important;
    }
    
    #toast-container .toast > div {
        min-width: 100% !important;
        max-width: 100% !important;
    }
}