/* 全局样式 */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 1rem;
    line-height: 1.4;
    min-height: 100vh;
}

.container-fluid {
    height: calc(100vh - 80px);
    padding: 1% 10%;
}

/* 导航栏样式 */
.navbar {
    background: rgba(255, 255, 255, 0.1) !important;
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.3rem;
    color: white !important;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
}

.navbar-brand:hover {
    transform: scale(1.05);
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.4);
}

.navbar-text {
    color: rgba(255, 255, 255, 0.9) !important;
    font-weight: 500;
}

.nav-link {
    color: rgba(255, 255, 255, 0.9) !important;
    font-weight: 500;
    transition: all 0.3s ease;
    border-radius: 8px;
    padding: 0.5rem 1rem !important;
}

.nav-link:hover {
    color: white !important;
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}

/* 日历样式 */
.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 2px;
    background: linear-gradient(145deg, #e2e8f0, #cbd5e0);
    border-radius: 12px;
    padding: 4px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.calendar-header-cell {
    background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    color: white;
    padding: 12px 4px;
    text-align: center;
    font-weight: 600;
    font-size: 0.8rem;
    border-radius: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 2px 8px rgba(79, 70, 229, 0.3);
}

.calendar-cell {
    background: white;
    height: 70px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    border: 2px solid transparent;
}

.calendar-cell:hover {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    border-color: #e2e8f0;
}

.calendar-cell.other-month {
    color: #94a3b8;
    background: #f8fafc;
    opacity: 0.6;
}

.calendar-cell.selected {
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    color: white;
    transform: scale(1.05);
    box-shadow: 0 12px 35px rgba(59, 130, 246, 0.4);
    border-color: #1e40af;
}

.calendar-cell.today {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
    font-weight: 700;
    box-shadow: 0 8px 25px rgba(16, 185, 129, 0.4);
    border-color: #047857;
}

.calendar-cell.today::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, #10b981, #3b82f6, #8b5cf6);
    border-radius: 10px;
    z-index: -1;
    animation: pulse-border 2s infinite;
}

@keyframes pulse-border {
    0%, 100% { opacity: 0.7; }
    50% { opacity: 1; }
}

.calendar-cell.selected.today {
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
}

.todo-count {
    position: absolute;
    top: 4px;
    right: 4px;
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
    border-radius: 50%;
    width: 18px;
    height: 18px;
    font-size: 10px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.4);
    border: 2px solid white;
    animation: bounce-in 0.3s ease-out;
}

@keyframes bounce-in {
    0% { transform: scale(0); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

/* 代办事项列表样式 */
.todo-list {
    max-height: calc(100vh - 220px);
    overflow-y: auto;
    padding: 8px;
}

.todo-item {
    border: none;
    border-radius: 12px;
    margin-bottom: 12px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    overflow: hidden;
    position: relative;
}

.todo-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    transition: width 0.3s ease;
}

.todo-item:hover {
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
    transform: translateY(-4px);
    background: rgba(255, 255, 255, 1);
}

.todo-item:hover::before {
    width: 6px;
}

.todo-item.completed {
    opacity: 0.8;
    background: rgba(248, 250, 252, 0.9);
}

.todo-item.completed::before {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.todo-item.completed .todo-title {
    text-decoration: line-through;
    color: #64748b;
}

.todo-header {
    padding: 5px 20px;
    border-bottom: 1px solid rgba(226, 232, 240, 0.8);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.todo-title {
    font-weight: 600;
    margin: 0;
    color: #1e293b;
    font-size: 1rem;
    background: linear-gradient(135deg, #1e293b 0%, #475569 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.todo-actions {
    display: flex;
    gap: 6px;
}

.todo-actions .btn {
    padding: 6px 12px;
    font-size: 0.8rem;
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.3s ease;
    border: none;
    position: relative;
    overflow: hidden;
}

.todo-actions .btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.todo-actions .btn:hover::before {
    left: 100%;
}

.todo-actions .btn-success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

.todo-actions .btn-warning {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    box-shadow: 0 2px 8px rgba(245, 158, 11, 0.3);
}

.todo-actions .btn-danger {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.3);
}

.todo-body {
    padding: 5px 20px;
}

.todo-description {
    color: #64748b;
    margin: 0;
    line-height: 1.6;
    font-size: 0.9rem;
}

.todo-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-top: 8px;
    font-size: 0.85rem;
    color: #64748b;
}

.todo-status {
    display: flex;
    align-items: center;
    gap: 6px;
}

.status-badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.status-badge.pending {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    color: #92400e;
    border: 1px solid #f59e0b;
}

.status-badge.completed {
    background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
    color: #065f46;
    border: 1px solid #10b981;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .calendar-cell {
        height: 30px;
        font-size: 0.75rem;
    }
    
    .todo-count {
        width: 12px;
        height: 12px;
        font-size: 8px;
    }
    
    .container-fluid {
        height: auto;
        padding: 10px;
    }
    
    .card.h-100 {
        height: auto !important;
        margin-bottom: 15px;
    }
    
    .todo-list {
        max-height: 350px;
    }
}

/* 动画效果 */
.fade-in {
    animation: fadeIn 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* 浮动动画 */
@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-6px);
    }
}

.calendar-cell.today {
    animation: float 3s ease-in-out infinite;
}

/* 脉冲动画 */
@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(59, 130, 246, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(59, 130, 246, 0);
    }
}

.btn-primary:focus {
    animation: pulse 1.5s infinite;
}

/* 渐变背景动画 */
@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

body {
    background: linear-gradient(-45deg, #e2e8f0, #cbd5e1, #f1f5f9, #e4e7eb);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
}

/* 自定义滚动条 */
.todo-list::-webkit-scrollbar {
    width: 8px;
}

.todo-list::-webkit-scrollbar-track {
    background: rgba(241, 245, 249, 0.8);
    border-radius: 10px;
}

.todo-list::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #cbd5e1 0%, #94a3b8 100%);
    border-radius: 10px;
    border: 2px solid rgba(255, 255, 255, 0.5);
}

.todo-list::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #94a3b8 0%, #64748b 100%);
}

/* 加载状态 */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 60px;
    color: #64748b;
}

.loading .spinner-border {
    margin-right: 16px;
    color: #3b82f6;
}

/* 空状态样式 */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: #64748b;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 16px;
    margin: 20px 0;
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #94a3b8 0%, #cbd5e1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.8;
}

.empty-state p {
    font-size: 1.1rem;
    margin-bottom: 24px;
    font-weight: 500;
}

/* 表单样式优化 */
.form-control:focus {
    border-color: #3b82f6;
    box-shadow: 0 0 0 0.25rem rgba(59, 130, 246, 0.25);
    background: rgba(255, 255, 255, 0.95);
}

.form-control {
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
    border-radius: 10px;
    border: 2px solid #e2e8f0;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.form-label {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #475569;
    background: linear-gradient(135deg, #475569 0%, #64748b 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.btn {
    border-radius: 10px;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    padding: 0.75rem 1.5rem;
    font-size: 0.9rem;
    border: none;
    position: relative;
    overflow: hidden;
}

.btn::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 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.btn-primary {
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
}

.btn-success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
}

.btn-warning {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    box-shadow: 0 4px 15px rgba(245, 158, 11, 0.4);
}

.btn-danger {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.4);
}

.btn-light {
    background: rgba(255, 255, 255, 0.9);
    color: #475569;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

/* 卡片样式 */
.card {
    border: none;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    overflow: hidden;
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
}

.card-header {
    border-radius: 16px 16px 0 0 !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    font-weight: 700;
    padding: 20px 24px;
    font-size: 1rem;
    position: relative;
    overflow: hidden;
}

.card-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, rgba(255,255,255,0.1) 100%);
    pointer-events: none;
}

.card-header.bg-info {
    background: linear-gradient(135deg, #0ea5e9 0%, #0284c7 100%) !important;
    color: white;
}

.card-header.bg-primary {
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%) !important;
    color: white;
}

.card-body {
    padding: 24px;
    background: rgba(255, 255, 255, 0.5);
}

/* 模态框样式 */
.modal-content {
    border: none;
    border-radius: 20px;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.25);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    overflow: hidden;
}

.modal-header {
    border-bottom: 1px solid rgba(226, 232, 240, 0.5);
    border-radius: 20px 20px 0 0;
    padding: 1.5rem 2rem;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    position: relative;
}

.modal-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.8) 0%, rgba(255,255,255,0.4) 100%);
    pointer-events: none;
}

.modal-title {
    font-weight: 700;
    color: #1e293b;
    position: relative;
    z-index: 1;
}

.modal-body {
    padding: 2rem;
    background: rgba(255, 255, 255, 0.8);
}

.modal-footer {
    border-top: 1px solid rgba(226, 232, 240, 0.5);
    border-radius: 0 0 20px 20px;
    padding: 1.5rem 2rem;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
}