/* GEO优化方案生成系统 - 全局样式 - 深色科技风 */
:root {
    --bg: #0a0e1a;
    --bg-card: #111827;
    --bg-input: #0f172a;
    --border: #1e293b;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --primary-dark: #1d4ed8;
    --accent: #fbbf24;
    --success: #22c55e;
    --danger: #ef4444;
    --warn: #f59e0b;
    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --text-dim: #64748b;
    --radius: 8px;
    --shadow: 0 4px 24px rgba(0,0,0,0.4);
}

* { margin:0; padding:0; box-sizing:border-box; }
body {
    font-family: 'Microsoft YaHei', 'PingFang SC', sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.6;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--accent); }

/* 布局 */
.layout { display: flex; min-height: 100vh; }

.sidebar {
    width: 240px;
    background: var(--bg-card);
    border-right: 1px solid var(--border);
    padding: 20px 0;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    overflow-y: auto;
}

.sidebar-logo {
    padding: 0 20px 20px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 16px;
}

.sidebar-logo h2 {
    font-size: 16px;
    color: var(--primary);
    line-height: 1.4;
}

.sidebar-logo .sub {
    font-size: 11px;
    color: var(--text-dim);
    margin-top: 2px;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    color: var(--text-muted);
    font-size: 14px;
    transition: all 0.2s;
    border-left: 3px solid transparent;
}

.sidebar-nav a:hover, .sidebar-nav a.active {
    background: rgba(59,130,246,0.1);
    color: var(--primary);
    border-left-color: var(--primary);
}

.sidebar-nav .icon { font-size: 18px; width: 24px; text-align: center; }

.main-content {
    margin-left: 240px;
    flex: 1;
    padding: 24px 32px;
    min-height: 100vh;
}

/* 顶部栏 */
.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 28px;
}

.topbar h1 { font-size: 22px; font-weight: 600; }

.topbar-right {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 13px;
    color: var(--text-muted);
}

/* 卡片 */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 20px;
}

.card-header {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header .badge {
    font-size: 12px;
    padding: 3px 10px;
    border-radius: 12px;
    background: rgba(59,130,246,0.15);
    color: var(--primary);
}

/* 统计卡片 */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.stat-card .stat-value { font-size: 36px; font-weight: 700; color: var(--primary); }
.stat-card .stat-label { font-size: 13px; color: var(--text-muted); margin-top: 4px; }
.stat-card.accent .stat-value { color: var(--accent); }
.stat-card.success .stat-value { color: var(--success); }

/* 表单 */
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 13px; color: var(--text-muted); margin-bottom: 6px; font-weight: 500; }
.form-group label .required { color: var(--danger); margin-left: 2px; }

input[type="text"], input[type="password"], input[type="email"], input[type="date"], input[type="number"],
textarea, select {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-size: 14px;
    font-family: inherit;
    transition: border-color 0.2s;
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59,130,246,0.15);
}

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

select { cursor: pointer; }
select option { background: var(--bg-card); color: var(--text); }

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

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

.btn-accent { background: var(--accent); color: #000; }
.btn-accent:hover { background: #f59e0b; }

.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #16a34a; }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #dc2626; }

.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }

.btn-sm { padding: 6px 14px; font-size: 12px; }
.btn-lg { padding: 14px 28px; font-size: 16px; }

.btn-group { display: flex; gap: 10px; flex-wrap: wrap; }

/* 表格 */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--border); font-size: 13px; }
th { color: var(--text-muted); font-weight: 600; background: rgba(15,23,42,0.5); }
tr:hover td { background: rgba(59,130,246,0.05); }

/* 标签 */
.tag {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 12px;
}
.tag-blue { background: rgba(59,130,246,0.15); color: var(--primary); }
.tag-green { background: rgba(34,197,94,0.15); color: var(--success); }
.tag-yellow { background: rgba(251,191,36,0.15); color: var(--accent); }
.tag-red { background: rgba(239,68,68,0.15); color: var(--danger); }
.tag-purple { background: rgba(139,92,246,0.15); color: #a78bfa; }

/* 弹窗 */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    z-index: 200;
    justify-content: center;
    align-items: center;
}

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

.modal {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 28px;
    max-width: 520px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
}

.modal h3 { font-size: 18px; margin-bottom: 20px; }

/* 消息提示 */
.msg { padding: 12px 16px; border-radius: 6px; margin-bottom: 16px; font-size: 14px; }
.msg-success { background: rgba(34,197,94,0.1); border:1px solid rgba(34,197,94,0.3); color: var(--success); }
.msg-error { background: rgba(239,68,68,0.1); border:1px solid rgba(239,68,68,0.3); color: var(--danger); }
.msg-info { background: rgba(59,130,246,0.1); border:1px solid rgba(59,130,246,0.3); color: var(--primary); }

/* 登录页 */
.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: var(--bg);
}

.login-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 40px;
    width: 400px;
    max-width: 90%;
}

.login-card h1 {
    font-size: 24px;
    color: var(--primary);
    text-align: center;
    margin-bottom: 8px;
}

.login-card .subtitle {
    text-align: center;
    color: var(--text-dim);
    font-size: 13px;
    margin-bottom: 32px;
}

/* 方案预览样式 (iframe内) */
.plan-preview {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 0;
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-dim);
}

.empty-state .icon { font-size: 48px; margin-bottom: 16px; }
.empty-state h3 { color: var(--text-muted); margin-bottom: 8px; }
.empty-state p { font-size: 14px; }

/* 响应式 */
@media (max-width: 768px) {
    .sidebar { width: 60px; }
    .sidebar-logo { display: none; }
    .sidebar-nav a span:not(.icon) { display: none; }
    .sidebar-nav a { padding: 12px; justify-content: center; }
    .main-content { margin-left: 60px; padding: 20px 16px; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
}