/* ========== 基础变量 ========== */
:root {
    /* 深色主题配色 */
    --bg-primary: #0f0f0f;
    --bg-secondary: #1a1a2e;
    --bg-card: #16213e;
    --bg-card-hover: #1f3056;
    --bg-overlay: rgba(0, 0, 0, 0.7);

    /* 强调色 */
    --accent-primary: #e94560;
    --accent-secondary: #0f3460;
    --accent-gradient: linear-gradient(135deg, #e94560 0%, #0f3460 100%);
    --accent-glow: 0 0 20px rgba(233, 69, 96, 0.4);

    /* 文字颜色 */
    --text-primary: #eee;
    --text-secondary: #aaa;
    --text-muted: #666;

    /* 边框和阴影 */
    --border-color: rgba(255, 255, 255, 0.1);
    --shadow-1: 0 2px 10px rgba(0, 0, 0, 0.3);
    --shadow-2: 0 8px 30px rgba(0, 0, 0, 0.5);

    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;

    /* 间距 */
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;

    /* 动画 */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ========== 重置样式 ========== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
}

/* ========== 背景动画 ========== */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 20% 80%, rgba(233, 69, 96, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(15, 52, 96, 0.2) 0%, transparent 50%),
        var(--bg-primary);
    z-index: -1;
    pointer-events: none;
}

/* ========== 主容器 ========== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

/* ========== 视图控制 ========== */
.view {
    display: none;
}

.view.active {
    display: block;
}

/* 隐藏元素 */
.hidden {
    display: none !important;
}

/* ========== 密码验证页面 ========== */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: var(--spacing-lg);
}

.login-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow-2);
    border: 1px solid var(--border-color);
    animation: slideUp 0.5s ease;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-card h1 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-md);
    text-align: center;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-card p {
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

/* ========== 表单元素 ========== */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.form-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.2);
}

.form-input::placeholder {
    color: var(--text-muted);
}

/* ========== 按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(233, 69, 96, 0.5);
}

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

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-card);
    border-color: var(--accent-primary);
}

.btn-danger {
    background: #dc3545;
    color: white;
}

.btn-danger:hover {
    background: #c82333;
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.875rem;
}

.btn-full {
    width: 100%;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* ========== 页面头部 ========== */
.page-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.page-header h1 {
    font-size: 1.5rem;
    flex: 1;
}

.back-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
    cursor: pointer;
    background: none;
    border: none;
    font-size: 1rem;
}

.back-btn:hover {
    color: var(--accent-primary);
}

/* ========== 板块卡片列表 ========== */
.groups-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.group-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.group-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent-gradient);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.group-card:hover {
    background: var(--bg-card-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-2);
}

.group-card:hover::before {
    transform: scaleX(1);
}

.group-card h3 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xs);
}

.group-card .item-count {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.group-card .item-count span {
    color: var(--accent-primary);
    font-weight: 600;
}

/* ========== 物品列表 ========== */
.items-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.item-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
}

.item-row:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-secondary);
}

.item-name {
    flex: 1;
    font-size: 0.95rem;
    word-break: break-all;
}

.item-actions {
    display: flex;
    gap: var(--spacing-xs);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.item-row:hover .item-actions {
    opacity: 1;
}

/* ========== 模态框 ========== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-overlay);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-2);
    border: 1px solid var(--border-color);
    transform: scale(0.9);
    transition: transform var(--transition-normal);
}

.modal-overlay.active .modal {
    transform: scale(1);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    font-size: 1.2rem;
}

.modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--bg-secondary);
    color: var(--accent-primary);
}

.modal-body {
    padding: var(--spacing-lg);
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.modal-footer .btn {
    white-space: nowrap;
    min-width: 80px;
}

/* ========== 搜索区域 ========== */
.search-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

/* ========== 筛选区域 ========== */
.filter-section {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
    align-items: center;
}

.filter-section .form-group {
    flex: 1;
    min-width: 120px;
    margin-bottom: 0;
}

.filter-section .form-input {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.9rem;
}

.search-results {
    max-height: 300px;
    overflow-y: auto;
}

.search-results .item-row {
    cursor: pointer;
}

.search-results .item-row:hover {
    border-color: var(--accent-primary);
}

.search-results .item-row.selected {
    background: var(--accent-secondary);
    border-color: var(--accent-primary);
}

/* ========== 加载状态 ========== */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ========== 消息提示 ========== */
.toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--bg-card);
    color: var(--text-primary);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-2);
    border: 1px solid var(--border-color);
    z-index: 2000;
    opacity: 0;
    transition: all var(--transition-normal);
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.toast.success {
    border-color: #28a745;
}

.toast.error {
    border-color: #dc3545;
}

/* ========== 空状态 ========== */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
}

.empty-state svg {
    width: 80px;
    height: 80px;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

/* ========== 确认对话框 ========== */
.confirm-dialog {
    text-align: center;
}

.confirm-dialog p {
    margin-bottom: var(--spacing-lg);
    color: var(--text-secondary);
}

.confirm-dialog .btn-group {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
}

/* ========== 响应式 ========== */
@media (max-width: 768px) {
    .container {
        padding: var(--spacing-md);
    }

    .groups-grid {
        grid-template-columns: 1fr;
    }

    .page-header {
        flex-direction: column;
        gap: var(--spacing-sm);
        align-items: stretch;
    }

    .page-header > div {
        flex-direction: column;
        gap: var(--spacing-xs);
        align-items: flex-start !important;
    }

    .page-header h1 {
        order: 0;
        width: 100%;
        margin-top: 0;
        font-size: 1.2rem;
    }

    .page-header .btn {
        width: 100%;
    }

    .search-section {
        grid-template-columns: 1fr;
    }

    .filter-section {
        flex-direction: column;
    }

    .filter-section .form-group {
        width: 100%;
    }

    .filter-section .btn {
        width: 100%;
    }

    .item-actions {
        opacity: 1;
    }

    .item-row {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-xs);
    }

    .item-row .item-name {
        padding-right: 0;
    }

    .item-row .item-actions {
        justify-content: flex-end;
    }

    /* 模态框优化 */
    .modal-overlay {
        padding: var(--spacing-sm);
    }

    .modal {
        max-width: 100%;
        max-height: 95vh;
    }

    .modal-header {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .modal-body {
        padding: var(--spacing-md);
    }

    .modal-footer {
        padding: var(--spacing-sm) var(--spacing-md);
        flex-direction: column;
        gap: var(--spacing-xs);
    }

    .modal-footer .btn {
        width: 100%;
    }

    .group-card {
        padding: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .container {
        padding: var(--spacing-sm);
    }

    .page-header {
        padding-bottom: var(--spacing-sm);
        margin-bottom: var(--spacing-sm);
    }

    .group-card {
        padding: var(--spacing-sm);
    }

    .group-card h3 {
        font-size: 1rem;
    }
}

/* ========== 滚动条美化 ========== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--accent-secondary);
    border-radius: 4px;
}

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