/* === Reset & Base === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --nav-bg: #1a1a2e;
    --nav-text: #e0e0e0;
    --primary: #4CAF50;
    --primary-hover: #43A047;
    --danger: #f44336;
    --danger-hover: #e53935;
    --info: #2196F3;
    --info-hover: #1E88E5;
    --bg: #f0f2f5;
    --card-bg: #ffffff;
    --border: #e0e0e0;
    --text: #333333;
    --text-secondary: #666666;
    --text-muted: #999999;
    --shadow: 0 2px 8px rgba(0,0,0,0.08);
    --radius: 8px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
}

/* === Navigation Sidebar === */
#nav-sidebar {
    width: 220px;
    min-width: 220px;
    background: var(--nav-bg);
    color: var(--nav-text);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    transition: transform 0.3s;
}

#nav-sidebar .nav-header {
    padding: 20px 16px;
    font-size: 16px;
    font-weight: 700;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    text-align: center;
    letter-spacing: 1px;
}

#nav-sidebar .nav-status {
    padding: 10px 16px;
    font-size: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.nav-status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}
.nav-status-dot.connected { background: #4CAF50; box-shadow: 0 0 6px #4CAF50; }
.nav-status-dot.disconnected { background: #f44336; box-shadow: 0 0 6px #f44336; }
.nav-status-dot.connecting { background: #FF9800; animation: pulse 1s infinite; }

@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }

#nav-sidebar nav { flex: 1; padding: 8px 0; }

#nav-sidebar nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    color: var(--nav-text);
    text-decoration: none;
    font-size: 14px;
    transition: background 0.2s;
    border-left: 3px solid transparent;
}

#nav-sidebar nav a:hover { background: rgba(255,255,255,0.08); }
#nav-sidebar nav a.active { background: rgba(255,255,255,0.12); border-left-color: var(--primary); }

#nav-sidebar .nav-footer {
    padding: 12px 16px;
    border-top: 1px solid rgba(255,255,255,0.08);
}

#nav-sidebar .nav-footer button {
    width: 100%;
    padding: 8px;
    background: rgba(255,255,255,0.1);
    color: var(--nav-text);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 4px;
    cursor: pointer;
    font-size: 13px;
}
#nav-sidebar .nav-footer button:hover { background: rgba(255,255,255,0.18); }

/* === Main Content === */
#main-content {
    margin-left: 220px;
    flex: 1;
    min-height: 100vh;
    padding: 24px;
}

.page { display: none; }
.page.active { display: block; }

/* === Login Page (no sidebar) === */
body.login-page #nav-sidebar { display: none; }
body.login-page #main-content { margin-left: 0; display: flex; align-items: center; justify-content: center; }

.login-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: 0 4px 24px rgba(0,0,0,0.12);
    padding: 48px 40px;
    width: 400px;
    max-width: 90vw;
    text-align: center;
}

.login-card h1 {
    font-size: 22px;
    color: var(--nav-bg);
    margin-bottom: 4px;
}

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

.login-card .form-group {
    margin-bottom: 16px;
    text-align: left;
}

.login-card label {
    display: block;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.login-card input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 14px;
    transition: border-color 0.2s;
}

.login-card input:focus { outline: none; border-color: var(--primary); }

.login-card input:disabled {
    background: #f5f5f5;
    color: var(--text-muted);
    cursor: not-allowed;
}

.login-card .login-btn {
    width: 100%;
    padding: 12px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 15px;
    cursor: pointer;
    margin-top: 8px;
    transition: background 0.2s;
}

.login-card .login-btn:hover { background: var(--primary-hover); }

.login-card .login-hint {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 16px;
}

/* === Dashboard === */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

@media (max-width: 1200px) { .dashboard-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 768px) { .dashboard-grid { grid-template-columns: 1fr; } }

.dash-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 32px 24px;
    text-align: center;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    text-decoration: none;
    color: var(--text);
    display: block;
}

.dash-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.14);
}

.dash-card .card-icon { font-size: 36px; margin-bottom: 12px; }

.dash-card .card-title {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 4px;
}

.dash-card .card-desc {
    font-size: 13px;
    color: var(--text-muted);
}

.dash-card.out { border-top: 4px solid #FF9800; }
.dash-card.in  { border-top: 4px solid #2196F3; }
.dash-card.yk  { border-top: 4px solid #f44336; }
.dash-card.ao  { border-top: 4px solid #4CAF50; }
.dash-card.param { border-top: 4px solid #9C27B0; }
.dash-card.monitor { border-top: 4px solid #607D8B; }

/* === Page Header === */
.page-header {
    margin-bottom: 20px;
}

.page-header h2 {
    font-size: 20px;
    color: var(--nav-bg);
}

.page-header p {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 2px;
}

/* === Toolbar / Form Row === */
.toolbar {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 16px 20px;
    margin-bottom: 16px;
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    align-items: flex-end;
}

.toolbar .field { display: flex; flex-direction: column; gap: 4px; }

.toolbar .field label {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 500;
}

.toolbar input, .toolbar select {
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 14px;
}

.toolbar input:focus, .toolbar select:focus { outline: none; border-color: var(--primary); }

.toolbar input[type="text"] { width: 260px; }
.toolbar select { width: 130px; }

/* === Buttons === */
.btn {
    padding: 8px 18px;
    border: none;
    border-radius: 4px;
    font-size: 14px;
    cursor: pointer;
    transition: background 0.2s;
    white-space: nowrap;
}

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

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

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

.btn-outline {
    background: #fff;
    color: var(--text-secondary);
    border: 1px solid var(--border);
}
.btn-outline:hover { background: #f5f5f5; }

.btn-sm { padding: 5px 12px; font-size: 12px; }

.btn-success { background: #4CAF50; color: #fff; }
.btn-success:hover { background: #43A047; }

.btn-warn { background: #FF9800; color: #fff; }
.btn-warn:hover { background: #F57C00; }

/* === Table === */
.table-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.table-wrapper {
    max-height: 58vh;
    overflow-y: auto;
}

.signal-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.signal-table thead th {
    position: sticky;
    top: 0;
    background: #2c3e50;
    color: #fff;
    padding: 10px 12px;
    text-align: left;
    z-index: 10;
    font-weight: 500;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.signal-table tbody td {
    padding: 9px 12px;
    border-bottom: 1px solid #f0f0f0;
}

.signal-table tbody tr:hover { background: #f8f9fa; }

.signal-table .val-input {
    width: 100px;
    padding: 5px 8px;
    border: 1px solid var(--border);
    border-radius: 3px;
    font-size: 13px;
}

.signal-table .val-input:focus { outline: none; border-color: var(--primary); }

.signal-table .empty-row td {
    text-align: center;
    color: var(--text-muted);
    padding: 40px;
    font-size: 14px;
}

/* === Expandable Row (Param/定值) === */
.expand-row { cursor: pointer; }
.expand-row:hover { background: #f0f4ff !important; }
.expand-icon { display: inline-block; transition: transform 0.2s; font-size: 12px; margin-right: 4px; }
.expand-icon.open { transform: rotate(90deg); }

.zone-sub-row td { padding: 0 !important; border-bottom: none !important; }

.zone-sub-table {
    width: 100%;
    border-collapse: collapse;
    background: #f8f9fb;
    border-left: 3px solid #9C27B0;
}

.zone-sub-table thead th {
    background: #eceff1;
    color: #555;
    font-size: 11px;
    padding: 7px 10px;
    position: static;
}

.zone-sub-table tbody td {
    padding: 7px 10px;
    font-size: 12px;
    border-bottom: 1px solid #e8e8e8;
}

/* === Monitor Page === */
.monitor-stats {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 12px 20px;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 13px;
}

.monitor-stats .stat-label { color: var(--text-muted); }
.monitor-stats .stat-value { font-weight: 600; }

.monitor-log {
    background: #1e1e2e;
    color: #cdd6f4;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 8px 0;
    height: 68vh;
    overflow-y: auto;
    font-family: "SF Mono", "Fira Code", "Cascadia Code", monospace;
    font-size: 12px;
}

.monitor-empty {
    padding: 40px;
    text-align: center;
    color: #6c7086;
    font-size: 13px;
}

/* 每条记录 */
.mon-item {
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.mon-item.open {
    background: rgba(255,255,255,0.03);
}

.mon-item-head {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 16px;
    cursor: pointer;
    transition: background 0.15s;
}

.mon-item-head:hover {
    background: rgba(255,255,255,0.05);
}

.mon-time { color: #6c7086; white-space: nowrap; font-size: 11px; }

.mon-dir {
    font-weight: 700;
    white-space: nowrap;
    font-size: 11px;
    padding: 2px 6px;
    border-radius: 3px;
}
.mon-dir.mon-up   { color: #a6e3a1; background: rgba(166,227,161,0.12); }
.mon-dir.mon-down { color: #89b4fa; background: rgba(137,180,250,0.12); }

.mon-addr {
    color: #9399b2;
    white-space: nowrap;
    font-size: 11px;
}

.mon-summary {
    color: #cdd6f4;
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 12px;
}

.mon-expand-icon {
    color: #6c7086;
    font-size: 10px;
    white-space: nowrap;
    min-width: 14px;
    text-align: center;
}

/* 展开的详情 */
.mon-item-body {
    padding: 0 16px 12px 16px;
}

.mon-item-body pre {
    background: rgba(0,0,0,0.25);
    color: #cdd6f4;
    padding: 12px;
    border-radius: 4px;
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-all;
    font-size: 11px;
    line-height: 1.6;
    margin: 0;
    border-left: 3px solid #585b70;
}

/* === Utility === */
.hidden { display: none !important; }

/* === Responsive === */
@media (max-width: 768px) {
    #nav-sidebar { width: 180px; min-width: 180px; }
    #main-content { margin-left: 180px; padding: 16px; }
    .toolbar { flex-direction: column; }
    .toolbar input[type="text"] { width: 100%; }
    .dashboard-grid { grid-template-columns: 1fr; }
    .signal-table { font-size: 12px; }
    .signal-table thead th, .signal-table tbody td { padding: 6px 8px; }
}