:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --bg-hover: #1c2128;
    --border: #30363d;
    --text-primary: #c9d1d9;
    --text-secondary: #8b949e;
    --text-muted: #484f58;
    --accent-blue: #58a6ff;
    --accent-green: #3fb950;
    --accent-red: #f85149;
    --accent-yellow: #d29922;
    --accent-purple: #bc8cff;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,0.3);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 14px; line-height: 1.5; color: var(--text-primary); background: var(--bg-primary);
}

.app { display: flex; min-height: 100vh; }

.sidebar {
    width: 220px; background: var(--bg-secondary); border-right: 1px solid var(--border);
    display: flex; flex-direction: column; flex-shrink: 0; position: fixed; top: 0; bottom: 0; z-index: 100;
}
.sidebar-header { padding: 16px; border-bottom: 1px solid var(--border); }
.logo { font-size: 18px; font-weight: 700; color: var(--accent-blue); }
.nav-links { list-style: none; padding: 8px 0; flex: 1; }
.nav-link {
    display: flex; align-items: center; gap: 10px; padding: 10px 16px;
    color: var(--text-secondary); text-decoration: none; transition: all 0.15s;
}
.nav-link:hover { background: var(--bg-tertiary); color: var(--text-primary); }
.nav-link.active { color: var(--accent-blue); background: rgba(88,166,255,0.1); border-right: 3px solid var(--accent-blue); }
.nav-icon { font-size: 12px; width: 16px; text-align: center; }

.content { flex: 1; margin-left: 220px; display: flex; flex-direction: column; min-height: 100vh; }

.top-bar {
    display: flex; align-items: center; gap: 16px; padding: 12px 24px;
    background: var(--bg-secondary); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 50;
}
.top-bar-left, .top-bar-right { display: flex; align-items: center; gap: 12px; }
.top-bar-right { margin-left: auto; }
.menu-toggle { display: none; background: none; border: none; color: var(--text-primary); font-size: 20px; cursor: pointer; }

.page-content { padding: 24px; flex: 1; }
.page-title { font-size: 22px; font-weight: 600; margin-bottom: 20px; }

.badge { display: inline-block; padding: 4px 12px; border-radius: 12px; font-size: 12px; font-weight: 600; }
.badge-success { background: rgba(63,185,80,0.2); color: var(--accent-green); }
.badge-warning { background: rgba(210,153,34,0.2); color: var(--accent-yellow); }
.badge-error { background: rgba(248,81,73,0.2); color: var(--accent-red); }
.badge-secondary { background: var(--bg-tertiary); color: var(--text-secondary); }
.badge-info { background: rgba(88,166,255,0.2); color: var(--accent-blue); }

.dashboard-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 24px; }
.settings-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); gap: 16px; margin-bottom: 24px; }

.card {
    background: var(--bg-secondary); border: 1px solid var(--border); border-radius: var(--radius);
    padding: 16px; box-shadow: var(--shadow);
}
.card h3 { font-size: 13px; color: var(--text-secondary); margin-bottom: 12px; text-transform: uppercase; letter-spacing: 0.5px; }
.card-label { font-size: 12px; color: var(--text-secondary); margin-bottom: 4px; }
.card-value { font-size: 22px; font-weight: 600; }
.card-value-sm { font-size: 14px; }
.card-sub { font-size: 12px; color: var(--text-muted); margin-top: 4px; }
.full-width { grid-column: 1 / -1; }
.card-green .card-value { color: var(--accent-green); }
.card-red .card-value { color: var(--accent-red); }
.card-blue .card-value { color: var(--accent-blue); }
.card-purple .card-value { color: var(--accent-purple); }
.card-yellow .card-value { color: var(--accent-yellow); }

.text-muted { color: var(--text-muted); }
.text-center { text-align: center; }
.positive { color: var(--accent-green) !important; }
.negative { color: var(--accent-red) !important; }

.toolbar { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }

.data-table { width: 100%; border-collapse: collapse; }
.data-table th, .data-table td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); }
.data-table th { font-size: 11px; color: var(--text-secondary); font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; }
.data-table tr:hover { background: var(--bg-tertiary); }
.data-table td { font-size: 13px; }

.form-group { margin-bottom: 12px; }
.form-label { display: block; font-size: 12px; color: var(--text-secondary); margin-bottom: 4px; font-weight: 500; }
.form-input, .form-select {
    width: 100%; padding: 8px 12px; background: var(--bg-tertiary); border: 1px solid var(--border);
    border-radius: 6px; color: var(--text-primary); font-size: 13px; outline: none; transition: border-color 0.15s;
}
.form-input:focus, .form-select:focus { border-color: var(--accent-blue); }
.form-select { cursor: pointer; }
.form-select-sm { width: auto; padding: 6px 10px; font-size: 12px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-actions { display: flex; align-items: center; gap: 12px; margin-top: 16px; }

.btn {
    padding: 8px 16px; border: 1px solid var(--border); border-radius: 6px; cursor: pointer;
    font-size: 13px; font-weight: 500; transition: all 0.15s; background: var(--bg-tertiary); color: var(--text-primary);
}
.btn:hover { background: var(--bg-hover); }
.btn-primary { background: var(--accent-blue); border-color: var(--accent-blue); color: #fff; }
.btn-primary:hover { opacity: 0.9; }
.btn-success { background: var(--accent-green); border-color: var(--accent-green); color: #fff; }
.btn-danger { background: var(--accent-red); border-color: var(--accent-red); color: #fff; }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-lg { padding: 10px 24px; font-size: 14px; }
.btn-group { display: flex; gap: 8px; }

.toggle { display: flex; align-items: center; gap: 10px; cursor: pointer; padding: 8px 0; color: var(--text-primary); font-size: 13px; }
.toggle input { display: none; }
.toggle-slider {
    width: 36px; height: 20px; background: var(--bg-tertiary); border-radius: 10px; position: relative; transition: background 0.2s;
}
.toggle-slider::after {
    content: ''; position: absolute; top: 2px; left: 2px; width: 16px; height: 16px;
    background: var(--text-secondary); border-radius: 50%; transition: transform 0.2s;
}
.toggle input:checked + .toggle-slider { background: var(--accent-blue); }
.toggle input:checked + .toggle-slider::after { transform: translateX(16px); background: #fff; }
.toggle-group { display: flex; flex-direction: column; gap: 4px; }
.toggle-inline { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; color: var(--text-secondary); cursor: pointer; }

.log-viewer {
    background: var(--bg-primary); border: 1px solid var(--border); border-radius: 6px;
    padding: 12px; max-height: 500px; overflow-y: auto; font-family: 'Consolas', 'Monaco', monospace; font-size: 12px;
    line-height: 1.8;
}
.log-line { padding: 2px 0; border-bottom: 1px solid rgba(48,54,61,0.3); }
.log-time { color: var(--text-muted); }
.log-info { color: var(--accent-blue); }
.log-warning { color: var(--accent-yellow); }
.log-error { color: var(--accent-red); }
.log-category { color: var(--accent-purple); }

.health-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; }
.health-item { display: flex; justify-content: space-between; padding: 8px 0; border-bottom: 1px solid var(--border); }
.health-label { color: var(--text-secondary); font-size: 13px; }

.position-card {
    background: var(--bg-tertiary); border: 1px solid var(--border); border-radius: 6px;
    padding: 12px 16px; margin-bottom: 8px; display: flex; justify-content: space-between; align-items: center;
}
.position-info { display: flex; gap: 24px; align-items: center; }
.position-symbol { font-weight: 600; font-size: 14px; }
.position-details { font-size: 12px; color: var(--text-secondary); }
.position-pnl { font-size: 16px; font-weight: 600; }

.empty-state { text-align: center; padding: 40px; color: var(--text-muted); }

.metric-inline { font-size: 13px; font-weight: 500; }
.user-chip {
    color: var(--accent-blue);
    background: rgba(88,166,255,0.1);
    border: 1px solid rgba(88,166,255,0.25);
    border-radius: 999px;
    padding: 4px 10px;
}
.logout-form { margin: 0; }
.bot-controls { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 8px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.login-page { min-height: 100vh; background: var(--bg-primary); }
.login-shell {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}
.login-card {
    width: min(420px, 100%);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    box-shadow: var(--shadow);
}
.login-brand { color: var(--accent-blue); font-size: 18px; font-weight: 700; margin-bottom: 18px; }
.login-card h1 { font-size: 22px; margin-bottom: 16px; }
.login-submit { width: 100%; margin-top: 8px; }
.alert { padding: 10px 12px; border-radius: 6px; margin-bottom: 14px; font-size: 13px; }
.alert-error { color: var(--accent-red); background: rgba(248,81,73,0.12); border: 1px solid rgba(248,81,73,0.35); }

/* Toast notifications */
.toast-container {
    position: fixed; top: 20px; right: 20px; z-index: 9999;
    display: flex; flex-direction: column; gap: 8px; pointer-events: none;
}
.toast {
    pointer-events: auto; padding: 12px 20px; border-radius: 8px;
    font-size: 13px; font-weight: 500; color: #fff; min-width: 280px; max-width: 420px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.4); display: flex; align-items: center; gap: 10px;
    animation: toastIn 0.3s ease-out;
}
.toast.removing { animation: toastOut 0.3s ease-in forwards; }
.toast-success { background: #1a4731; border: 1px solid var(--accent-green); }
.toast-error { background: #4a1d1d; border: 1px solid var(--accent-red); }
.toast-info { background: #1a3a5c; border: 1px solid var(--accent-blue); }
.toast-warning { background: #4a3a1d; border: 1px solid var(--accent-yellow); }
.toast-icon { font-size: 16px; flex-shrink: 0; }
.toast-msg { flex: 1; }
.toast-close { background: none; border: none; color: rgba(255,255,255,0.6); cursor: pointer; font-size: 16px; padding: 0 4px; }
.toast-close:hover { color: #fff; }
@keyframes toastIn { from { opacity: 0; transform: translateX(40px); } to { opacity: 1; transform: translateX(0); } }
@keyframes toastOut { from { opacity: 1; transform: translateX(0); } to { opacity: 0; transform: translateX(40px); } }

/* Loading spinner */
.spinner { display: inline-block; width: 14px; height: 14px; border: 2px solid rgba(255,255,255,0.3); border-top-color: #fff; border-radius: 50%; animation: spin 0.6s linear infinite; vertical-align: middle; margin-right: 6px; }
.spinner-dark { border-color: rgba(0,0,0,0.2); border-top-color: var(--accent-blue); }
@keyframes spin { to { transform: rotate(360deg); } }
.btn-loading { pointer-events: none; opacity: 0.7; }

/* Broker status card */
.broker-status-card {
    display: flex; align-items: center; gap: 10px; padding: 10px 14px;
    background: var(--bg-tertiary); border-radius: 6px; font-size: 13px;
}
.broker-status-dot {
    width: 8px; height: 8px; border-radius: 50%; background: var(--text-muted); flex-shrink: 0;
}
.broker-status-card.connected .broker-status-dot { background: var(--accent-green); box-shadow: 0 0 6px var(--accent-green); }
.broker-status-card.error .broker-status-dot { background: var(--accent-red); box-shadow: 0 0 6px var(--accent-red); }
.broker-status-msg { margin-top: 10px; font-size: 12px; min-height: 18px; }

@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); transition: transform 0.2s; }
    .sidebar.open { transform: translateX(0); }
    .content { margin-left: 0; }
    .menu-toggle { display: block; }
    .dashboard-grid { grid-template-columns: 1fr 1fr; }
    .settings-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .page-content { padding: 16px; }
    .position-card { flex-direction: column; gap: 8px; align-items: flex-start; }
}

@media (max-width: 480px) {
    .dashboard-grid { grid-template-columns: 1fr; }
}