/* ========================================
   宇泽创新科技 - 后台管理系统样式
   ======================================== */

:root {
    --color-primary: #0066ff;
    --color-primary-dark: #0044cc;
    --color-accent: #00d4ff;
    --color-accent-2: #7c3aed;
    --color-success: #00ff88;
    --color-warning: #ffaa00;
    --color-danger: #ff4757;

    --bg-darkest: #050810;
    --bg-dark: #0a0e1a;
    --bg-dark-2: #111827;
    --bg-sidebar: #0d1220;
    --bg-card: rgba(15, 23, 42, 0.8);
    --bg-input: #1a1f2e;
    --bg-hover: rgba(0, 102, 255, 0.1);

    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    --text-tertiary: #64748b;

    --gradient-primary: linear-gradient(135deg, #0066ff 0%, #00d4ff 100%);
    --gradient-text: linear-gradient(135deg, #00d4ff 0%, #7c3aed 100%);

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 30px rgba(0, 102, 255, 0.3);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;

    --sidebar-width: 240px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--bg-darkest);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
}

/* === Login Page === */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.login-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.login-bg::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(0, 102, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 102, 255, 0.05) 1px, transparent 1px);
    background-size: 40px 40px;
}

.login-bg .glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
}

.login-bg .glow-1 {
    width: 400px; height: 400px;
    background: var(--color-primary);
    top: -100px; right: -100px;
    opacity: 0.3;
}

.login-bg .glow-2 {
    width: 300px; height: 300px;
    background: var(--color-accent-2);
    bottom: -50px; left: -50px;
    opacity: 0.2;
}

.login-card {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 420px;
    padding: 48px 40px;
    background: rgba(10, 14, 26, 0.8);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(0, 212, 255, 0.15);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

.login-logo {
    text-align: center;
    margin-bottom: 32px;
}

.login-logo .logo-icon {
    width: 120px; height: 120px;
    border-radius: var(--radius-md);
    display: block;
    object-fit: contain;
    background: transparent;
    box-shadow: none;
    margin: 0 auto 16px;
    filter: drop-shadow(0 0 12px rgba(255, 255, 255, 0.2));
}

.login-logo h1 {
    font-size: 1.4rem;
    font-weight: 700;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-logo p {
    color: var(--text-tertiary);
    font-size: 0.85rem;
    margin-top: 4px;
}

.login-form .form-group {
    margin-bottom: 20px;
}

.login-form label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.login-form input {
    width: 100%;
    padding: 14px 16px;
    background: var(--bg-input);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    transition: var(--transition);
}

.login-form input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.login-form .btn-login {
    width: 100%;
    padding: 14px;
    background: var(--gradient-primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-glow);
}

.login-form .btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 40px rgba(0, 102, 255, 0.5);
}

.login-hint {
    text-align: center;
    margin-top: 24px;
    padding: 12px;
    background: rgba(0, 212, 255, 0.05);
    border: 1px solid rgba(0, 212, 255, 0.1);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    color: var(--text-tertiary);
}

/* === Admin Layout === */
.admin-layout {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-sidebar);
    border-right: 1px solid rgba(0, 212, 255, 0.08);
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    display: flex;
    align-items: center;
    gap: 12px;
}

.sidebar-header .logo-icon {
    width: 48px; height: 48px;
    border-radius: var(--radius-sm);
    display: block;
    object-fit: contain;
    background: transparent;
    box-shadow: none;
    flex-shrink: 0;
    filter: drop-shadow(0 0 6px rgba(255, 255, 255, 0.2));
}

.sidebar-header span {
    font-size: 1rem;
    font-weight: 600;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar-nav {
    flex: 1;
    padding: 16px 0;
    overflow-y: auto;
}

.sidebar-nav .nav-section {
    padding: 8px 20px;
    font-size: 0.7rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 12px;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: var(--transition);
    border-left: 3px solid transparent;
}

.sidebar-nav a:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.sidebar-nav a.active {
    background: var(--bg-hover);
    color: var(--color-accent);
    border-left-color: var(--color-accent);
}

.sidebar-nav a .icon {
    width: 20px;
    text-align: center;
    font-size: 1.1rem;
}

.sidebar-nav a .badge {
    margin-left: auto;
    background: var(--color-danger);
    color: #fff;
    font-size: 0.7rem;
    padding: 2px 8px;
    border-radius: 50px;
    min-width: 20px;
    text-align: center;
}

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.sidebar-footer a {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-tertiary);
    font-size: 0.85rem;
    padding: 8px 0;
    transition: var(--transition);
}

.sidebar-footer a:hover {
    color: var(--color-accent);
}

/* Main Content */
.admin-main {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 0;
    min-height: 100vh;
}

.admin-header {
    background: rgba(10, 14, 26, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 212, 255, 0.08);
    padding: 16px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 50;
}

.admin-header h1 {
    font-size: 1.3rem;
    font-weight: 600;
}

.admin-header .header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.admin-header .user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 16px;
    background: var(--bg-input);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.admin-header .user-avatar {
    width: 32px; height: 32px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 600;
}

.admin-header .user-name {
    font-size: 0.85rem;
}

.admin-content {
    padding: 32px;
}

/* === Dashboard Cards === */
.stats-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card:hover {
    border-color: rgba(0, 212, 255, 0.2);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

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

.stat-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.stat-card-icon {
    width: 48px; height: 48px;
    border-radius: var(--radius-sm);
    background: var(--bg-hover);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
}

.stat-card-trend {
    font-size: 0.8rem;
    padding: 4px 10px;
    border-radius: 50px;
}

.stat-card-trend.up {
    background: rgba(0, 255, 136, 0.1);
    color: var(--color-success);
}

.stat-card-trend.down {
    background: rgba(255, 71, 87, 0.1);
    color: var(--color-danger);
}

.stat-card-value {
    font-size: 2rem;
    font-weight: 800;
    line-height: 1;
}

.stat-card-label {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: 8px;
}

/* === Dashboard Grid === */
.dashboard-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 20px;
    margin-bottom: 32px;
}

.panel {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.panel-header {
    padding: 20px 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.panel-header h3 {
    font-size: 1rem;
    font-weight: 600;
}

.panel-header a {
    font-size: 0.8rem;
    color: var(--color-accent);
}

.panel-body {
    padding: 20px 24px;
}

/* Chart placeholder */
.chart-placeholder {
    height: 280px;
    display: flex;
    align-items: flex-end;
    justify-content: space-around;
    gap: 12px;
    padding: 20px 0;
}

.chart-bar {
    flex: 1;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    position: relative;
    transition: var(--transition);
    min-height: 20px;
    opacity: 0.8;
}

.chart-bar:hover {
    opacity: 1;
    box-shadow: var(--shadow-glow);
}

.chart-bar .bar-label {
    position: absolute;
    bottom: -24px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.75rem;
    color: var(--text-tertiary);
    white-space: nowrap;
}

.chart-bar .bar-value {
    position: absolute;
    top: -24px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 600;
}

/* Recent list */
.recent-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.recent-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    cursor: pointer;
}

.recent-item:hover {
    background: var(--bg-hover);
}

.recent-item .recent-icon {
    width: 36px; height: 36px;
    border-radius: var(--radius-sm);
    background: var(--bg-hover);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
}

.recent-item .recent-info {
    flex: 1;
    min-width: 0;
}

.recent-item .recent-title {
    font-size: 0.85rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.recent-item .recent-time {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

/* === Data Table === */
.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th {
    text-align: left;
    padding: 14px 16px;
    font-size: 0.8rem;
    color: var(--text-tertiary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.data-table td {
    padding: 14px 16px;
    font-size: 0.9rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.data-table tr:hover td {
    background: var(--bg-hover);
}

.data-table .status-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 500;
}

.status-published, .status-active, .status-read {
    background: rgba(0, 255, 136, 0.1);
    color: var(--color-success);
}

.status-draft, .status-unread {
    background: rgba(255, 170, 0, 0.1);
    color: var(--color-warning);
}

.status-archived {
    background: rgba(100, 116, 139, 0.1);
    color: var(--text-tertiary);
}

/* === Table Actions === */
.table-actions {
    display: flex;
    gap: 8px;
}

.action-btn {
    width: 32px; height: 32px;
    border-radius: var(--radius-sm);
    background: var(--bg-input);
    border: 1px solid rgba(255, 255, 255, 0.06);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.85rem;
}

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

.action-btn.danger:hover {
    background: rgba(255, 71, 87, 0.1);
    border-color: var(--color-danger);
}

/* === Toolbar === */
.toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 16px;
}

.toolbar-left {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
}

.toolbar-right {
    display: flex;
    gap: 12px;
}

.search-box {
    position: relative;
}

.search-box input {
    padding: 10px 16px 10px 40px;
    background: var(--bg-input);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: inherit;
    width: 260px;
    transition: var(--transition);
}

.search-box input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.search-box .search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-tertiary);
}

.filter-select {
    padding: 10px 16px;
    background: var(--bg-input);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: inherit;
    cursor: pointer;
}

.filter-select:focus {
    outline: none;
    border-color: var(--color-accent);
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-family: inherit;
}

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

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 0 30px rgba(0, 102, 255, 0.5);
}

.btn-secondary {
    background: var(--bg-input);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

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

.btn-danger {
    background: rgba(255, 71, 87, 0.15);
    color: var(--color-danger);
    border: 1px solid rgba(255, 71, 87, 0.3);
}

.btn-danger:hover {
    background: var(--color-danger);
    color: #fff;
}

/* === Modal === */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-overlay.show {
    display: flex;
}

.modal {
    background: var(--bg-dark-2);
    border: 1px solid rgba(0, 212, 255, 0.15);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 560px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-md);
}

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-tertiary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
    line-height: 1;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

/* === Form === */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-input);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

/* === Empty State === */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-tertiary);
}

.empty-state .empty-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.empty-state p {
    font-size: 0.9rem;
}

/* === Welcome Banner === */
.welcome-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 28px 32px;
    background: linear-gradient(135deg, rgba(0,102,255,0.08) 0%, rgba(0,212,255,0.05) 100%);
    border: 1px solid rgba(0,212,255,0.12);
    border-radius: var(--radius-md);
    margin-bottom: 24px;
}

.welcome-banner h2 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.welcome-banner p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.welcome-actions {
    display: flex;
    gap: 12px;
}

/* === Header Enhancements === */
.header-left {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.header-breadcrumb {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.header-btn {
    padding: 8px 16px;
    background: var(--bg-input);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.85rem;
    text-decoration: none;
    transition: var(--transition);
}

.header-btn:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
}

/* === Info Text === */
.info-text {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.info-text strong {
    color: var(--text-primary);
}

/* === Quick Actions === */
.quick-actions {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 12px;
    margin-bottom: 24px;
}

.quick-action-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 20px 8px;
    background: var(--bg-card);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: var(--transition);
}

.quick-action-item:hover {
    border-color: rgba(0,212,255,0.2);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.quick-action-item .qa-icon {
    font-size: 1.5rem;
}

.quick-action-item .qa-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.quick-action-item:hover .qa-label {
    color: var(--color-accent);
}

/* === Code tag in tables === */
.data-table code {
    background: var(--bg-input);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
}

/* === Responsive === */
@media (max-width: 1280px) {
    .quick-actions {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 1024px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    .quick-actions {
        grid-template-columns: repeat(4, 1fr);
    }
    .stats-cards {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .admin-main {
        margin-left: 0;
    }

    .stats-cards {
        grid-template-columns: 1fr 1fr;
    }

    .toolbar {
        flex-direction: column;
        align-items: stretch;
    }

    .search-box input {
        width: 100%;
    }

    .data-table {
        font-size: 0.8rem;
    }

    .data-table th, .data-table td {
        padding: 10px 8px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }
}