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

    :root {
      --bg:      #0f1117;
      --surface: #1a1d27;
      --border:  #2a2d3a;
      --text:    #e2e8f0;
      --muted:   #64748b;
      --accent:  #f59e0b;
      --green:   #10b981;
      --red:     #ef4444;
    }

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

    /* Header */
    header { display: flex; justify-content: space-between; align-items: center; padding: 13px 24px; background: var(--surface); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 50; }
    header h1 { font-size: 1.05rem; font-weight: 600; color: var(--accent); }
    .status { display: flex; align-items: center; gap: 8px; font-size: 0.8rem; color: var(--muted); }
    .dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }

    /* Tabs */
    .tabs { display: flex; gap: 2px; padding: 0 24px; background: var(--surface); border-bottom: 1px solid var(--border); }
    .tab { padding: 10px 18px; font-size: 0.85rem; color: var(--muted); cursor: pointer; border-bottom: 2px solid transparent; transition: color 0.15s, border-color 0.15s; user-select: none; }
    .tab:hover { color: var(--text); }
    .tab.active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; }

    /* Layout */
    .panel { padding: 24px; max-width: 1000px; margin: 0 auto; }
    .grid  { display: grid; grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); gap: 16px; margin-bottom: 20px; }

    /* Cards */
    .card { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 18px 20px; }
    .card-title { font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin-bottom: 14px; }
    .row { display: flex; justify-content: space-between; align-items: center; padding: 7px 0; font-size: 0.88rem; border-bottom: 1px solid var(--border); }
    .row:last-child { border-bottom: none; }
    .row-label { color: var(--muted); }
    .row-value { font-weight: 500; font-variant-numeric: tabular-nums; }

    /* Battery bar */
    .batt-pct { font-size: 2.2rem; font-weight: 700; line-height: 1; margin-bottom: 10px; }
    .bar-track { background: var(--border); border-radius: 4px; height: 7px; overflow: hidden; margin-bottom: 14px; }
    .bar-fill  { height: 100%; border-radius: 4px; transition: width 0.6s ease, background 0.6s ease; }

    /* Chart container */
    .chart-wrap { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 16px 20px; margin-bottom: 20px; }
    .chart-wrap .card-title { margin-bottom: 12px; }
    .chart-wrap .plotly-chart { width: 100%; }

    /* Profile */
    .profile-card { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 18px 20px; margin-bottom: 20px; }
    .profile-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
    .profile-btns { display: flex; gap: 10px; flex-wrap: wrap; }
    .profile-btn { flex: 1; min-width: 110px; padding: 9px 14px; border: 1px solid var(--border); border-radius: 6px; background: var(--bg); color: var(--text); font-size: 0.88rem; cursor: pointer; transition: border-color 0.15s, color 0.15s, background 0.15s; }
    .profile-btn:not([disabled]):hover { border-color: var(--accent); color: var(--accent); }
    .profile-btn.active { border-color: var(--accent); background: rgba(245,158,11,0.08); color: var(--accent); font-weight: 600; }
    .profile-btn[disabled] { opacity: 0.35; cursor: not-allowed; }

    /* Params table */
    .param-table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
    .param-table th { text-align: left; padding: 7px 10px; font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); border-bottom: 1px solid var(--border); }
    .param-table td { padding: 8px 10px; border-bottom: 1px solid var(--border); }
    .param-table tr:last-child td { border-bottom: none; }
    .param-table td:first-child { color: var(--muted); }

    /* Energy tiles */
    .energy-period { margin-bottom: 28px; }
    .energy-period h3 { font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin-bottom: 12px; }
    .energy-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; }
    .energy-tile { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 16px; }
    .energy-tile .label { font-size: 0.75rem; color: var(--muted); margin-bottom: 6px; }
    .energy-tile .value { font-size: 1.5rem; font-weight: 700; font-variant-numeric: tabular-nums; }
    .energy-tile .unit  { font-size: 0.78rem; color: var(--muted); margin-top: 2px; }
    .energy-tile.gen .value { color: var(--green); }
    .energy-tile.con .value { color: var(--accent); }

    /* Buttons */
    .btn { padding: 5px 12px; border-radius: 5px; font-size: 0.78rem; cursor: pointer; border: 1px solid; background: transparent; transition: background 0.15s, color 0.15s, border-color 0.15s; }
    .btn-accent  { border-color: var(--accent); color: var(--accent); }
    .btn-accent:hover { background: rgba(245,158,11,0.1); }
    .btn-muted   { border-color: var(--border); color: var(--muted); }
    .btn-muted:hover { border-color: var(--red); color: var(--red); }
    .btn-action  { padding: 7px 14px; border-color: var(--border); color: var(--text); font-size: 0.85rem; }
    .btn-action:not([disabled]):hover { border-color: var(--accent); color: var(--accent); }
    .btn-action[disabled] { opacity: 0.4; cursor: not-allowed; }
    .btn-danger  { padding: 7px 14px; border: 1px solid var(--red); border-radius: 6px; background: transparent; color: var(--red); font-size: 0.85rem; cursor: pointer; }
    .btn-danger:hover { background: rgba(239,68,68,0.1); }

    .section-actions { display: flex; justify-content: flex-end; gap: 8px; margin-bottom: 20px; }

    /* Badges */
    .badge { display: inline-block; padding: 2px 8px; border-radius: 4px; font-size: 0.75rem; font-weight: 600; }
    .badge-ok   { background: rgba(16,185,129,0.15); color: var(--green); }
    .badge-err  { background: rgba(239,68,68,0.15);  color: var(--red); }
    .badge-sim  { background: rgba(139,92,246,0.18); color: #a78bfa; letter-spacing: 0.05em; }

    /* Modals */
    .overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.65); z-index: 200; align-items: flex-start; justify-content: center; padding: 40px 16px; overflow-y: auto; }
    .overlay.open { display: flex; }
    .modal { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 28px; width: 100%; max-width: 480px; }
    .modal h2 { font-size: 1.05rem; font-weight: 600; margin-bottom: 20px; }
    .modal-section { font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin: 18px 0 10px; padding-bottom: 6px; border-bottom: 1px solid var(--border); }
    .modal-actions { display: flex; gap: 10px; margin-top: 20px; }

    .field { margin-bottom: 12px; }
    .field label { display: block; font-size: 0.78rem; color: var(--muted); margin-bottom: 4px; }
    .field input { width: 100%; padding: 7px 10px; background: var(--bg); border: 1px solid var(--border); border-radius: 6px; color: var(--text); font-size: 0.88rem; outline: none; }
    .field input:focus { border-color: var(--accent); }
    .field-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

    .form-error { font-size: 0.78rem; color: var(--red); min-height: 16px; margin: 4px 0; }

    .btn-primary   { flex: 1; padding: 8px; background: var(--accent); border: none; border-radius: 6px; color: #000; font-weight: 700; font-size: 0.88rem; cursor: pointer; }
    .btn-primary:hover { opacity: 0.88; }
    .btn-secondary { padding: 8px 14px; background: transparent; border: 1px solid var(--border); border-radius: 6px; color: var(--muted); font-size: 0.88rem; cursor: pointer; }
    .btn-secondary:hover { border-color: var(--text); color: var(--text); }


    /* Settings panel */
    .settings-section { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 18px 20px; margin-bottom: 16px; }
    .settings-title { font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin-bottom: 14px; padding-bottom: 8px; border-bottom: 1px solid var(--border); }
    .settings-row { display: flex; justify-content: space-between; align-items: center; padding: 12px 0; gap: 16px; }
    .settings-row + .settings-row { border-top: 1px solid var(--border); }
    .settings-label { font-size: 0.88rem; font-weight: 500; }
    .settings-hint  { font-size: 0.76rem; color: var(--muted); margin-top: 3px; }
    .settings-input { width: 90px; padding: 6px 10px; background: var(--bg); border: 1px solid var(--border); border-radius: 6px; color: var(--text); font-size: 0.88rem; outline: none; text-align: right; }
    .settings-input:focus { border-color: var(--accent); }

    /* Toggle switch */
    .toggle { position: relative; display: inline-block; width: 40px; height: 22px; flex-shrink: 0; cursor: pointer; }
    .toggle input { opacity: 0; width: 0; height: 0; position: absolute; }
    .toggle-slider { position: absolute; inset: 0; background: var(--border); border-radius: 22px; transition: background 0.2s; }
    .toggle-slider::before { content: ''; position: absolute; width: 16px; height: 16px; left: 3px; bottom: 3px; background: #fff; border-radius: 50%; transition: transform 0.2s; }
    .toggle input:checked + .toggle-slider { background: var(--accent); }
    .toggle input:checked + .toggle-slider::before { transform: translateX(18px); }

    /* Reset button */
    .btn-reset { padding: 5px 8px; font-size: 0.82rem; border-radius: 5px; border: 1px solid var(--border); color: var(--muted); background: transparent; cursor: pointer; line-height: 1; transition: color 0.15s, border-color 0.15s; }
    .btn-reset:hover { color: var(--accent); border-color: var(--accent); }

    /* Setup warning banner */
    .setup-banner { display: flex; align-items: center; gap: 10px; background: rgba(245,158,11,0.1); border: 1px solid rgba(245,158,11,0.35); border-radius: 8px; padding: 11px 16px; margin-bottom: 20px; font-size: 0.85rem; color: var(--accent); }
    .setup-banner a { color: var(--accent); font-weight: 600; cursor: pointer; text-decoration: underline; }

    /* Feedback banners */
    .feedback-ok  { background: rgba(16,185,129,0.12); color: var(--green); border: 1px solid rgba(16,185,129,0.25); border-radius: 6px; padding: 8px 14px; font-size: 0.82rem; margin-bottom: 14px; }
    .feedback-err { background: rgba(239,68,68,0.12);  color: var(--red);   border: 1px solid rgba(239,68,68,0.25);  border-radius: 6px; padding: 8px 14px; font-size: 0.82rem; margin-bottom: 14px; }

    /* Admin header bar (logout) */
    .admin-bar { display: flex; justify-content: flex-end; align-items: center; margin-bottom: 20px; gap: 8px; font-size: 0.82rem; color: var(--muted); }

    /* History table */
    .hist-toolbar { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-bottom: 16px; }
    .hist-input   { padding: 6px 10px; background: var(--bg); border: 1px solid var(--border); border-radius: 6px; color: var(--text); font-size: 0.84rem; outline: none; }
    .hist-input:focus { border-color: var(--accent); }
    .hist-select  { padding: 6px 10px; background: var(--bg); border: 1px solid var(--border); border-radius: 6px; color: var(--text); font-size: 0.84rem; outline: none; cursor: pointer; }
    .hist-summary { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 8px; font-size: 0.8rem; color: var(--muted); margin-bottom: 10px; }
    .hist-table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 8px; }
    .hist-table   { width: 100%; border-collapse: collapse; font-size: 0.8rem; white-space: nowrap; }
    .hist-table th { padding: 8px 12px; text-align: right; font-size: 0.68rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); background: var(--surface); border-bottom: 1px solid var(--border); }
    .hist-table th:first-child { text-align: left; }
    .hist-table td { padding: 7px 12px; text-align: right; border-bottom: 1px solid var(--border); font-variant-numeric: tabular-nums; }
    .hist-table td:first-child { text-align: left; color: var(--muted); font-size: 0.75rem; }
    .hist-table tr:last-child td { border-bottom: none; }
    .hist-table tr:hover td { background: rgba(255,255,255,0.025); }
    .hist-empty { padding: 40px; text-align: center; color: var(--muted); font-size: 0.88rem; }
    .hist-placeholder { text-align: center; padding: 48px 20px; color: var(--muted); }
    .hist-placeholder .icon { font-size: 1.8rem; margin-bottom: 10px; }

    /* Logs tab */
    .log-panes { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
    @media (max-width: 900px) { .log-panes { grid-template-columns: 1fr; } }
    .log-pane { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; display: flex; flex-direction: column; min-height: 0; }
    .log-pane-header { display: flex; justify-content: space-between; align-items: center; padding: 14px 16px 0 16px; }
    .log-box { margin: 12px 16px 16px 16px; padding: 10px 12px; background: var(--bg); border: 1px solid var(--border); border-radius: 6px; max-height: 65vh; overflow-y: auto; font-family: 'SF Mono', Menlo, Consolas, monospace; font-size: 0.75rem; line-height: 1.5; }
    .log-line { white-space: pre-wrap; word-break: break-all; color: var(--text); padding: 1px 0; }
    .log-line:hover { background: rgba(255,255,255,0.03); }
    .log-empty { padding: 30px 16px; text-align: center; color: var(--muted); font-size: 0.85rem; }