/* 监控雷达 V2 - 轻量级样式 */

:root {
    --primary: #00d4aa;
    --secondary: #667eea;
    --danger: #f56565;
    --warning: #ed8936;
    --success: #48bb78;
    
    /* Light Theme (Default) */
    --bg: #f7fafc;
    --card-bg: #ffffff;
    --text: #1a202c;
    --text-muted: #4a5568;
    --border: #e2e8f0;
    --nav-bg: linear-gradient(135deg, var(--primary), var(--secondary));
}

[data-theme='dark'] {
    --bg: #1a202c;
    --card-bg: #2d3748;
    --text: #f7fafc;
    --text-muted: #a0aec0;
    --border: #4a5568;
    --nav-bg: #111;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    transition: background 0.3s, color 0.3s;
}

/* ==================== 导航栏 ==================== */

.navbar {
    background: var(--nav-bg);
    color: white;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: bold;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-links a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    transition: background 0.3s;
}

.nav-links a:hover,
.nav-links a.active {
    background: rgba(255, 255, 255, 0.2);
}

.theme-toggle {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.9rem;
}

/* ==================== 容器 ==================== */

.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

/* ==================== 登录页面 ==================== */

.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: var(--nav-bg);
}

.login-box {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 400px;
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-header h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.login-header p {
    color: var(--text-muted);
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.login-footer {
    text-align: center;
    margin-top: 1.5rem;
    color: var(--text-muted);
}

/* ==================== 表单 ==================== */

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

.form-group label {
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.75rem;
    border: 2px solid var(--border);
    border-radius: 5px;
    font-size: 1rem;
    background: var(--card-bg);
    color: var(--text);
    transition: border-color 0.3s;
}

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

/* ==================== 按钮 ==================== */

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background: var(--nav-bg);
    color: white;
}

.btn-secondary {
    background: var(--gray);
    color: white;
}

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

.btn-danger {
    background: var(--danger);
    color: white;
}

/* ==================== 仪表盘 ==================== */

.page-header {
    margin-bottom: 2rem;
}

.page-header h1 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.stats-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.stat-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    text-align: center;
    border: 1px solid var(--border);
}

.stat-value {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--primary);
}

.stat-label {
    color: var(--text-muted);
    margin-top: 0.5rem;
}

/* ==================== 消息列表 ==================== */

.messages-section {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--border);
}

.message-card {
    border-left: 4px solid var(--primary);
    background: var(--bg);
    padding: 1.5rem;
    border-radius: 5px;
    margin-bottom: 1rem;
    transition: transform 0.2s;
    border-top: 1px solid var(--border);
    border-right: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.message-card.priority-high { border-left-color: var(--danger); }
.message-card.priority-medium { border-left-color: var(--warning); }

.message-content {
    color: var(--text-muted);
}

/* ==================== 配置页面 ==================== */

.config-section {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    margin-bottom: 2rem;
    border: 1px solid var(--border);
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
    font-size: 0.875rem;
}

@media (max-width: 768px) {
    .navbar { flex-direction: column; gap: 1rem; }
    .nav-links { flex-direction: column; width: 100%; text-align: center; }
}