:root {
    --bg: #0f172a;
    --bg-card: #1e293b;
    --bg-card-hover: #263348;
    --bg-input: #1e293b;
    --border: #334155;
    --text: #f1f5f9;
    --text-muted: #94a3b8;
    --text-dim: #64748b;
    --primary: #6366f1;
    --primary-hover: #818cf8;
    --success: #10b981;
    --success-bg: rgba(16,185,129,0.12);
    --danger: #ef4444;
    --danger-bg: rgba(239,68,68,0.12);
    --warning: #f59e0b;
    --warning-bg: rgba(245,158,11,0.12);
    --info: #3b82f6;
    --info-bg: rgba(59,130,246,0.12);
    --purple: #a78bfa;
    --purple-bg: rgba(167,139,250,0.12);
    --amber: #fbbf24;
    --amber-bg: rgba(251,191,36,0.12);
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,0.3), 0 1px 2px rgba(0,0,0,0.2);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.4);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.5;
}

/* Navbar */
.navbar {
    background: #0b1120;
    border-bottom: 1px solid var(--border);
    padding: 0 24px;
    height: 56px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(12px);
}
.nav-left { display: flex; align-items: center; gap: 12px; }
.nav-right { display: flex; align-items: center; gap: 16px; }
.nav-logo { color: var(--primary); display: flex; }
.nav-brand { font-size: 16px; font-weight: 600; letter-spacing: -0.02em; }
.nav-status {
    display: flex; align-items: center; gap: 6px;
    font-size: 12px; color: var(--text-muted);
    padding: 4px 12px;
    background: var(--bg-card);
    border-radius: 20px;
    border: 1px solid var(--border);
}
.pulse-dot {
    width: 8px; height: 8px;
    background: var(--success);
    border-radius: 50%;
    display: inline-block;
    animation: pulse 2s infinite;
}
.pulse-dot.disconnected {
    background: var(--danger);
    animation: none;
}
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}
.btn-nav {
    display: flex; align-items: center; gap: 6px;
    padding: 6px 14px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.15s;
    text-decoration: none;
}
.btn-nav:hover { color: var(--text); border-color: var(--text-dim); background: var(--bg-card); }

/* Container */
.container { max-width: 1100px; margin: 0 auto; padding: 28px 24px; }

/* Page header */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 28px;
}
.page-header h1 {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 4px;
}
.page-subtitle { color: var(--text-muted); font-size: 14px; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    color: var(--text);
    cursor: pointer;
    font-size: 13px;
    font-family: inherit;
    font-weight: 500;
    transition: all 0.15s;
    text-decoration: none;
    white-space: nowrap;
}
.btn:hover { background: var(--bg-card-hover); border-color: var(--text-dim); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-full { width: 100%; justify-content: center; }

.btn-outline { background: transparent; }
.btn-outline:hover { background: var(--bg-card); }

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

.btn-success { background: var(--success-bg); border-color: rgba(16,185,129,0.3); color: var(--success); }
.btn-success:hover { background: rgba(16,185,129,0.2); border-color: var(--success); }

.btn-danger { background: var(--danger-bg); border-color: rgba(239,68,68,0.3); color: var(--danger); }
.btn-danger:hover { background: rgba(239,68,68,0.2); border-color: var(--danger); }

.btn-warning { background: var(--warning-bg); border-color: rgba(245,158,11,0.3); color: var(--warning); }
.btn-warning:hover { background: rgba(245,158,11,0.2); border-color: var(--warning); }

.btn-action { background: transparent; border-color: var(--border); color: var(--text-muted); }
.btn-action:hover { color: var(--text); background: var(--bg-card-hover); border-color: var(--text-dim); }

/* Spinner */
.spinner {
    width: 14px; height: 14px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    display: inline-block;
    animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Cards */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    transition: border-color 0.15s, box-shadow 0.15s;
}
.card:hover { border-color: var(--text-dim); box-shadow: var(--shadow); }

.card-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 14px;
}

.card-icon {
    width: 42px; height: 42px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.card-icon-green { background: var(--success-bg); color: var(--success); }
.card-icon-blue { background: var(--info-bg); color: var(--info); }
.card-icon-amber { background: var(--amber-bg); color: var(--amber); }
.card-icon-purple { background: var(--purple-bg); color: var(--purple); }

.card-title {
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 0.02em;
    margin-bottom: 4px;
}

.card-meta {
    font-size: 12px;
    color: var(--text-dim);
    margin-bottom: 4px;
    font-family: 'SF Mono', 'Fira Code', monospace;
}

.card-divider {
    height: 1px;
    background: var(--border);
    margin: 14px 0;
}

.card-actions { display: flex; flex-direction: column; gap: 8px; }
.action-row { display: flex; flex-wrap: wrap; gap: 6px; }

/* Status */
.status-indicator {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 500;
    padding: 4px 10px;
    border-radius: 20px;
}
.status-indicator.active {
    background: var(--success-bg);
    color: var(--success);
}
.status-indicator.inactive {
    background: var(--danger-bg);
    color: var(--danger);
}
.status-dot-sm {
    width: 6px; height: 6px;
    border-radius: 50%;
    background: currentColor;
    display: inline-block;
}

/* Login */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: radial-gradient(ellipse at top, #1e293b 0%, var(--bg) 70%);
}
.login-box {
    width: 100%;
    max-width: 400px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 36px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
}
.login-header { text-align: center; margin-bottom: 28px; }
.login-logo { margin-bottom: 16px; }
.login-header h2 { font-size: 22px; font-weight: 700; margin-bottom: 6px; }
.login-subtitle { color: var(--text-muted); font-size: 14px; }

.form-group { margin-bottom: 18px; }
.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-muted);
}
.form-group input {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: inherit;
    background: var(--bg-input);
    color: var(--text);
    transition: border-color 0.15s;
}
.form-group input::placeholder { color: var(--text-dim); }
.form-group input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(99,102,241,0.15); }

/* Alert */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    font-size: 13px;
    border: 1px solid transparent;
}
.alert-error { background: var(--danger-bg); color: var(--danger); border-color: rgba(239,68,68,0.3); }

/* Output panel */
.output-panel {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-top: 8px;
}
.output-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}
.output-header h3 { font-size: 15px; font-weight: 600; }
.output-panel pre {
    background: #0b1120;
    color: #a5f3a5;
    padding: 16px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    overflow-x: auto;
    max-height: 500px;
    overflow-y: auto;
    font-size: 12px;
    font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
    line-height: 1.6;
    white-space: pre-wrap;
    word-break: break-all;
}

/* Modal */
.modal {
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}
.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 28px;
    border-radius: var(--radius);
    max-width: 420px;
    width: 90%;
    box-shadow: var(--shadow-lg);
    text-align: center;
}
.modal-icon { margin-bottom: 12px; }
.modal-content h3 { margin-bottom: 8px; font-size: 17px; }
.modal-content p { margin-bottom: 24px; color: var(--text-muted); font-size: 14px; }
.modal-actions { display: flex; gap: 10px; justify-content: center; }

/* Toast */
.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    padding: 12px 20px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    z-index: 200;
    animation: slideIn 0.3s ease;
    box-shadow: var(--shadow-lg);
}
.toast-success { background: var(--success); color: #fff; }
.toast-error { background: var(--danger); color: #fff; }
.toast-info { background: var(--info); color: #fff; }
@keyframes slideIn {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* Log Viewer */
.log-tabs {
    display: flex; gap: 4px;
    margin-bottom: 16px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 0;
}
.log-tab {
    padding: 8px 18px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-muted);
    text-decoration: none;
    border-bottom: 2px solid transparent;
    transition: all 0.15s;
    margin-bottom: -1px;
}
.log-tab:hover { color: var(--text); }
.log-tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.log-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 12px;
    padding: 12px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}
.log-controls-left,
.log-controls-right {
    display: flex; align-items: center; gap: 10px;
}
.control-label {
    font-size: 12px; color: var(--text-muted); font-weight: 500;
    display: flex; align-items: center; gap: 4px;
}
.log-select, .log-input {
    padding: 5px 10px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 13px;
    font-family: inherit;
}
.log-select:focus, .log-input:focus {
    outline: none; border-color: var(--primary);
}
.log-input { width: 80px; }

.log-terminal {
    background: #0b1120;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    max-height: calc(100vh - 280px);
    min-height: 400px;
    overflow-y: auto;
}
.log-terminal pre {
    color: #e2e8f0;
    padding: 16px;
    margin: 0;
    font-size: 12px;
    font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
    line-height: 1.6;
    white-space: pre-wrap;
    word-break: break-all;
}

/* Responsive */
@media (max-width: 640px) {
    .container { padding: 16px; }
    .cards { grid-template-columns: 1fr; }
    .page-header { flex-direction: column; gap: 12px; }
    .navbar { padding: 0 16px; }
    .nav-status { display: none; }
}