/* ============================================
   工作助手系统 - UI 增强样式
   主题：海洋蓝调 + 流畅交互
   ============================================ */

/* ========== 1. 渐变色系统 ========== */
:root {
    /* 主题渐变 - 蓝色系 */
    --gradient-primary: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    --gradient-success: linear-gradient(135deg, #0891b2 0%, #06b6d4 100%);
    --gradient-warning: linear-gradient(135deg, #4f46e5 0%, #6366f1 100%);
    --gradient-danger: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
    --gradient-info: linear-gradient(135deg, #0ea5e9 0%, #38bdf8 100%);
    --gradient-purple: linear-gradient(135deg, #4338ca 0%, #6366f1 100%);

    /* 优先级渐变 - 红橙黄蓝 */
    --gradient-urgent-important: linear-gradient(135deg, #dc2626 0%, #ef4444 100%);  /* 红色 */
    --gradient-important: linear-gradient(135deg, #ea580c 0%, #f97316 100%);  /* 橙色 */
    --gradient-urgent: linear-gradient(135deg, #eab308 0%, #fbbf24 100%);  /* 黄色 */
    --gradient-normal: linear-gradient(135deg, #3b82f6 0%, #60a5fa 100%);  /* 蓝色 */

    /* 玻璃态 */
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.18);
    --glass-shadow: 0 8px 32px 0 rgba(59, 130, 246, 0.15);
}

/* ========== 2. 顶部导航栏增强 ========== */
.navbar.navbar-dark.bg-primary {
    background: var(--gradient-primary) !important;
    box-shadow: 0 4px 20px rgba(30, 64, 175, 0.3);
    backdrop-filter: blur(10px);
    border: none;
}

.navbar-brand {
    font-weight: 700;
    transition: all 0.3s ease;
}

.navbar-brand:hover {
    transform: scale(1.05);
    text-shadow: 0 0 20px rgba(255, 255, 255, 0.5);
}

.navbar-brand i {
    transition: all 0.3s ease;
}

.navbar-brand:hover i {
    transform: rotate(10deg) scale(1.1);
}

.nav-link {
    position: relative;
    transition: all 0.3s ease;
    border-radius: 8px;
    margin: 0 5px;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 3px;
    background: white;
    transform: translateX(-50%);
    transition: width 0.3s ease;
    border-radius: 3px 3px 0 0;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 80%;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.nav-link i {
    transition: all 0.3s ease;
}

.nav-link:hover i {
    transform: scale(1.2) rotate(5deg);
}

/* ========== 3. 统计卡片增强 ========== */
.stat-card {
    position: relative;
    overflow: hidden;
    border: none !important;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08) !important;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1) !important;
}

/* 今日待办 - 深蓝渐变 */
.stat-card:nth-child(1) {
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%) !important;
}

/* 超期待办 - 中蓝渐变 */
.stat-card:nth-child(2) {
    background: linear-gradient(135deg, #1e40af 0%, #60a5fa 100%) !important;
}

/* 待解决问题 - 靛蓝渐变 */
.stat-card:nth-child(3) {
    background: linear-gradient(135deg, #4338ca 0%, #7c3aed 100%) !important;
}

/* 完成率 - 青蓝渐变 */
.stat-card:nth-child(4) {
    background: linear-gradient(135deg, #0891b2 0%, #06b6d4 100%) !important;
}

/* 悬停时发光 + 抬升 */
.stat-card:hover {
    transform: translateY(-10px) scale(1.03) !important;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.2) !important;
}

/* 光泽扫过效果 */
.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.6s ease;
}

.stat-card:hover::before {
    left: 100%;
}

/* 图标区域 - 白色半透明 */
.stat-icon {
    background: rgba(255, 255, 255, 0.3) !important;
    color: white !important;
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.4);
    transition: all 0.3s ease !important;
}

.stat-card:hover .stat-icon {
    transform: scale(1.1) rotate(10deg);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

/* 文字颜色 - 白色 */
.stat-card .stat-label,
.stat-card .stat-value {
    color: white !important;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

/* 数字跳动动画 */
.stat-value {
    animation: countUp 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes countUp {
    0% {
        transform: scale(0.5);
        opacity: 0;
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

/* ========== 4. 按钮增强 ========== */
.btn {
    position: relative;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-weight: 600;
    border: none;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

/* 涟漪效果 */
.btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:active::after {
    width: 300px;
    height: 300px;
}

/* 主要按钮渐变 */
.btn-primary {
    background: var(--gradient-primary) !important;
    border: none;
}

.btn-success {
    background: var(--gradient-success) !important;
    border: none;
}

.btn-danger {
    background: var(--gradient-danger) !important;
    border: none;
}

.btn-warning {
    background: var(--gradient-warning) !important;
    border: none;
    color: white !important;
}

.btn-info {
    background: var(--gradient-info) !important;
    border: none;
}

/* 加载状态 */
.btn-loading {
    pointer-events: none;
    position: relative;
    color: transparent !important;
}

.btn-loading::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

@keyframes spin {
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

/* ========== 5. 卡片增强 ========== */
.card {
    border: none !important;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05) !important;
    transition: all 0.3s ease !important;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1) !important;
}

.card-header {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%) !important;
    font-weight: 700;
    border-bottom: 2px solid rgba(59, 130, 246, 0.1) !important;
}

/* ========== 6. 优先级标签 ========== */
.badge-priority {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    border: none;
    transition: all 0.3s ease;
    cursor: default;
}

.badge-priority:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

/* 重要紧急 - 红色脉动 */
.badge-urgent-important {
    background: var(--gradient-urgent-important);
    color: white;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(220, 38, 38, 0.7);
    }
    50% {
        box-shadow: 0 0 0 10px rgba(220, 38, 38, 0);
    }
}

/* 重要不紧急 - 橙色 */
.badge-important {
    background: var(--gradient-important);
    color: #fff;
}

/* 不重要紧急 - 黄色 */
.badge-urgent {
    background: var(--gradient-urgent);
    color: #fff;
}

/* 不重要不紧急 - 蓝色 */
.badge-normal {
    background: var(--gradient-normal);
    color: #fff;
}

/* ========== 7. 状态标签 ========== */
.badge-status {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.badge-status::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    animation: blink 1.5s ease-in-out infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* 未开始 */
.badge-not-started {
    background: #e5e7eb;
    color: #6b7280;
}

.badge-not-started::before {
    background: #9ca3af;
}

/* 进行中 - 蓝色闪烁 */
.badge-in-progress {
    background: linear-gradient(135deg, #60a5fa 0%, #3b82f6 100%);
    color: white;
}

.badge-in-progress::before {
    background: white;
    animation: pulse-dot 1.5s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.5);
        opacity: 0.5;
    }
}

/* 已完成 - 绿色 */
.badge-completed {
    background: var(--gradient-success);
    color: white;
}

.badge-completed::before {
    background: white;
}

/* 已超期 - 红色脉动 */
.badge-overdue {
    background: var(--gradient-danger);
    color: white;
    animation: shake 0.5s ease-in-out;
}

.badge-overdue::before {
    background: white;
    animation: pulse-dot 1s ease-in-out infinite;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* ========== 8. 表单输入增强 ========== */
.form-control:focus,
.form-select:focus {
    border-color: #3b82f6;
    box-shadow: 0 0 0 0.2rem rgba(59, 130, 246, 0.25),
                0 4px 15px rgba(59, 130, 246, 0.1);
    transform: translateY(-2px);
}

.form-control,
.form-select {
    border: 2px solid #e5e7eb;
    transition: all 0.3s ease;
    border-radius: 10px;
}

/* 输入框下划线动画 */
.form-floating {
    position: relative;
}

.form-floating::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--gradient-primary);
    transition: width 0.3s ease;
    border-radius: 3px;
}

.form-floating:focus-within::after {
    width: 100%;
}

/* ========== 9. Toast 通知增强 ========== */
.toast {
    animation: slideInRight 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15) !important;
    border: none;
    border-radius: 12px;
    overflow: hidden;
}

@keyframes slideInRight {
    0% {
        transform: translateX(400px);
        opacity: 0;
    }
    100% {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast-success {
    background: var(--gradient-success);
    color: white;
}

.toast-error {
    background: var(--gradient-danger);
    color: white;
}

.toast-warning {
    background: var(--gradient-warning);
    color: white;
}

.toast-info {
    background: var(--gradient-info);
    color: white;
}

/* ========== 10. 滚动条美化 ========== */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: #f1f5f9;
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    border-radius: 10px;
    transition: all 0.3s ease;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #3b82f6 0%, #1e3a8a 100%);
}

/* ========== 11. 加载动画 ========== */
.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(59, 130, 246, 0.2);
    border-top-color: #3b82f6;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.loading-dots {
    display: flex;
    gap: 8px;
}

.loading-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--gradient-primary);
    animation: bounce 1.4s ease-in-out infinite;
}

.loading-dots span:nth-child(2) {
    animation-delay: 0.2s;
}

.loading-dots span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes bounce {
    0%, 80%, 100% {
        transform: scale(0);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

/* ========== 12. 悬浮工具提示 ========== */
.tooltip-inner {
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    border-radius: 8px;
    padding: 8px 12px;
}

/* ========== 13. 特殊动画类 ========== */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.slide-up {
    animation: slideUp 0.4s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.scale-in {
    animation: scaleIn 0.3s ease-out;
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* 完成庆祝动画 */
.celebrate {
    animation: celebrate 0.6s ease-out;
}

@keyframes celebrate {
    0% { transform: scale(1); }
    25% { transform: scale(1.1) rotate(5deg); }
    50% { transform: scale(1.1) rotate(-5deg); }
    75% { transform: scale(1.1) rotate(5deg); }
    100% {
        transform: scale(0.95);
        opacity: 0.7;
    }
}

/* ========== 14. 响应式优化 ========== */
@media (max-width: 768px) {
    .stat-card {
        margin-bottom: 15px;
    }

    .nav-link {
        margin: 5px 0;
    }
}

/* ========== 15. 性能优化 ========== */
.stat-card,
.btn,
.card {
    will-change: transform;
    contain: layout style paint;
}

/* 禁用减少动画模式的用户的动画 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}