/* 全局变量定义 */
:root {
    --primary-color: #4a90e2;
    --primary-hover: #357abd;
    --danger-color: #ff6b6b;
    --danger-hover: #ee5253;
    --success-color: #2ecc71;
    --warning-color: #f1c40f;
    --text-color: #2c3e50;
    --text-light: #7f8c8d;
    --bg-color: #f4f6f9;
    --card-bg: #ffffff;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
    --radius-md: 12px;
    --radius-lg: 16px;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

/* 布局调整 */
.add-account-section {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: 30px;
    padding: 30px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    border: 1px solid rgba(0,0,0,0.02);
}

.add-account-section:hover {
    box-shadow: var(--shadow-lg);
}

.add-account-section h2 {
    margin-top: 0;
    margin-bottom: 25px;
    font-size: 1.5rem;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

/* 表单样式优化 */
.account-form {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 25px;
    align-items: flex-end;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-color);
    margin-left: 2px;
}

.form-group input {
    padding: 12px 16px;
    border: 2px solid #eef2f7;
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: all 0.3s ease;
    background-color: #fcfdfe;
}

.form-group input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
    outline: none;
    background-color: #fff;
}

/* 按钮通用样式 */
button.btn {
    font-weight: 600;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

button.btn-start {
    background: linear-gradient(135deg, var(--primary-color), #2980b9);
    color: white;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    box-shadow: 0 4px 10px rgba(74, 144, 226, 0.3);
    height: 48px; /* 与输入框对齐 */
}

button.btn-start:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(74, 144, 226, 0.4);
}

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

/* 列表区域优化 */
.accounts-list-section {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: 30px;
    border: 1px solid rgba(0,0,0,0.02);
}

.list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 2px solid #f0f2f5;
}

.list-header h2 {
    margin: 0;
    font-size: 1.5rem;
    color: var(--text-color);
}

/* 统计卡片 */
.stats {
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    padding: 12px 24px;
    border-radius: var(--radius-md);
    color: var(--text-color);
    font-weight: 500;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.03);
    border: 1px solid rgba(0,0,0,0.05);
}

.stats span span {
    color: var(--danger-color);
    font-size: 1.4rem;
    font-weight: 700;
    margin: 0 4px;
}

/* 表格优化 */
.table-responsive {
    overflow-x: auto;
    border-radius: var(--radius-md);
}

table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin-top: 5px;
}

th {
    background-color: #f8f9fa;
    color: var(--text-light);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
    padding: 16px;
    border-bottom: 2px solid #eef2f7;
    text-align: left;
}

td {
    padding: 20px 16px;
    border-bottom: 1px solid #f0f2f5;
    color: var(--text-color);
    vertical-align: middle;
    transition: background-color 0.2s;
}

tr:last-child td {
    border-bottom: none;
}

tr:hover td {
    background-color: #fcfcfc;
}

tr.expired {
    opacity: 0.6;
    background-color: #f9f9f9;
}

tr.expired td {
    color: var(--text-light);
}

/* 状态标签样式 */
.remaining-time {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    line-height: 1;
}

.time-warning {
    background-color: #fff8e1;
    color: #f39c12;
    border: 1px solid rgba(243, 156, 18, 0.2);
}

.time-danger {
    background-color: #ffebee;
    color: #e74c3c;
    border: 1px solid rgba(231, 76, 60, 0.2);
}

.time-ok {
    background-color: #e8f5e9;
    color: #27ae60;
    border: 1px solid rgba(39, 174, 96, 0.2);
}

/* 操作按钮 */
.btn-edit, .btn-delete {
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.2s ease;
}

.btn-edit {
    background-color: #eef2f7;
    color: var(--primary-color);
    margin-right: 8px;
}

.btn-edit:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 2px 8px rgba(74, 144, 226, 0.3);
}

.btn-delete {
    background-color: #ffebee;
    color: var(--danger-color);
}

.btn-delete:hover {
    background-color: var(--danger-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 2px 8px rgba(231, 76, 60, 0.3);
}

/* 弹窗样式优化 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: white;
    padding: 40px;
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 500px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.15);
    animation: modalSlideUp 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
    transform-origin: center bottom;
}

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

.modal-content h2 {
    margin-top: 0;
    color: var(--text-color);
    border-bottom: none;
    padding-bottom: 0;
    margin-bottom: 30px;
    font-size: 1.6rem;
    text-align: center;
}

.modal-buttons {
    display: flex;
    justify-content: space-between;
    gap: 15px;
    margin-top: 35px;
}

.modal-buttons button {
    flex: 1;
    padding: 12px;
    border-radius: var(--radius-md);
    font-weight: 600;
}

.btn-save {
    background: linear-gradient(135deg, var(--success-color), #27ae60);
    color: white;
    box-shadow: 0 4px 12px rgba(46, 204, 113, 0.3);
}

.btn-save:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(46, 204, 113, 0.4);
}

.btn-cancel {
    background-color: #f1f3f5;
    color: var(--text-light);
}

.btn-cancel:hover {
    background-color: #e9ecef;
    color: var(--text-color);
}

/* 响应式调整 */
@media (max-width: 768px) {
    .account-form {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .btn-start {
        width: 100%;
        margin-top: 10px;
    }
    
    .list-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .stats {
        width: 100%;
        box-sizing: border-box;
        text-align: center;
    }
    
    th, td {
        padding: 12px 10px;
        font-size: 0.9rem;
    }
    
    .modal-content {
        padding: 25px;
    }
}