/* ── Base ───────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
    --bg: #f4f5f7;
    --surface: #fff;
    --border: #dde1e6;
    --text: #1a1a2e;
    --text-muted: #6b7280;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --danger: #dc2626;
    --danger-hover: #b91c1c;
    --success: #16a34a;
    --warning: #f59e0b;
    --exceeded-bg: #fef2f2;
    --exceeded-border: #fca5a5;
    --sidebar-w: 320px;
    --nav-h: 52px;
    --radius: 6px;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 14px;
    line-height: 1.5;
}

/* ── Nav ────────────────────────────────────────────── */
.top-nav {
    height: var(--nav-h);
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    padding: 0 16px;
    gap: 16px;
    position: sticky;
    top: 0;
    z-index: 100;
}
.top-nav .app-title {
    font-weight: 700;
    font-size: 16px;
    white-space: nowrap;
}
.nav-tabs {
    display: flex;
    gap: 4px;
    flex: 1;
}
.nav-tab {
    padding: 6px 14px;
    border-radius: var(--radius);
    cursor: pointer;
    color: var(--text-muted);
    font-weight: 500;
    text-decoration: none;
}
.nav-tab:hover { background: var(--bg); }
.nav-tab.active { background: var(--primary); color: #fff; }
.nav-right {
    display: flex;
    align-items: center;
    gap: 12px;
    white-space: nowrap;
}
.role-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
}
.role-admin { background: #dbeafe; color: #1e40af; }
.role-editor { background: #fef3c7; color: #92400e; }
.role-viewer { background: #f3f4f6; color: #4b5563; }

/* ── Admin sub-nav ──────────────────────────────────── */
.admin-sub-nav {
    display: flex;
    gap: 4px;
    padding: 8px 16px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}

/* ── Buttons ────────────────────────────────────────── */
.btn-primary, .btn-secondary, .btn-sm, .btn-danger {
    border: none;
    border-radius: var(--radius);
    padding: 8px 16px;
    cursor: pointer;
    font-weight: 500;
    font-size: 13px;
    transition: background 0.15s;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-secondary { background: var(--bg); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: #e5e7eb; }
.btn-sm { padding: 4px 10px; font-size: 12px; background: var(--bg); border: 1px solid var(--border); }
.btn-sm:hover { background: #e5e7eb; }
.btn-danger { background: var(--danger); color: #fff; padding: 4px 10px; font-size: 12px; }
.btn-danger:hover { background: var(--danger-hover); }
button:disabled { opacity: 0.5; cursor: not-allowed; }

/* ── Forms ──────────────────────────────────────────── */
input[type="text"], input[type="email"], input[type="password"],
input[type="datetime-local"], textarea, select, .form-control {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 13px;
    background: var(--surface);
    margin-bottom: 12px;
}
textarea { min-height: 60px; resize: vertical; }
label { display: block; font-weight: 500; margin-bottom: 4px; font-size: 13px; }

/* ── Spinner ────────────────────────────────────────── */
.spinner, .spinner-sm {
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    margin: 20px auto;
}
.spinner { width: 32px; height: 32px; }
.spinner-sm { width: 18px; height: 18px; border-width: 2px; margin: 8px auto; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Messages ───────────────────────────────────────── */
.error-msg { color: var(--danger); padding: 8px; font-size: 13px; }
.success-msg { color: var(--success); padding: 8px; font-size: 13px; }
.empty-msg, .placeholder-msg { color: var(--text-muted); padding: 20px; text-align: center; }

/* ── Data tables ────────────────────────────────────── */
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}
.data-table th {
    text-align: left;
    padding: 8px 10px;
    background: var(--bg);
    border-bottom: 2px solid var(--border);
    font-weight: 600;
    white-space: nowrap;
    position: sticky;
    top: 0;
}
.data-table td {
    padding: 6px 10px;
    border-bottom: 1px solid var(--border);
}
.data-table tr:hover td { background: #f9fafb; }
.data-table tr.limit-exceeded td { background: var(--exceeded-bg); }
.exceeded-badge {
    color: var(--danger);
    font-weight: 700;
    font-size: 11px;
}
.data-table-wrapper { overflow-x: auto; margin-top: 16px; }
.data-summary { text-align: center; color: var(--text-muted); padding: 12px; }
.action-cell { white-space: nowrap; display: flex; gap: 4px; }

/* ── Lot browser ────────────────────────────────────── */
.lot-browser {
    display: flex;
    height: calc(100vh - var(--nav-h));
}
.lot-sidebar {
    width: var(--sidebar-w);
    min-width: var(--sidebar-w);
    background: var(--surface);
    border-right: 1px solid var(--border);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}
.sidebar-search {
    padding: 10px;
    border-bottom: 1px solid var(--border);
}
.sidebar-search input { margin-bottom: 0; }
.kwo-list { flex: 1; overflow-y: auto; }
.kwo-group { border-bottom: 1px solid var(--border); }
.kwo-header {
    padding: 10px 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
}
.kwo-header:hover { background: var(--bg); }
.kwo-toggle { font-size: 10px; color: var(--text-muted); width: 14px; text-align: center; }
.kwo-meta { color: var(--text-muted); font-size: 12px; margin-left: auto; }
.kwo-lots { padding-left: 28px; }
.lot-row {
    padding: 8px 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    border-top: 1px solid #f0f0f0;
}
.lot-row:hover { background: #f0f4ff; }
.lot-row.selected { background: #dbeafe; }
.lot-number { font-weight: 500; }
.lot-type-badge {
    display: inline-block;
    padding: 1px 8px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 600;
    background: #e0e7ff;
    color: #3730a3;
}
.lot-dates { color: var(--text-muted); font-size: 12px; margin-left: auto; }
.lot-main { flex: 1; overflow-y: auto; padding: 20px; }

/* ── Lot detail ─────────────────────────────────────── */
.lot-detail h2 { margin-bottom: 12px; }
.lot-meta-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-bottom: 16px;
}
.lot-sensors { margin-bottom: 16px; }
.lot-sensors h3 { font-size: 14px; margin-bottom: 8px; }
.sensor-source { font-weight: 400; color: var(--text-muted); font-size: 12px; }
.sensor-list { display: flex; flex-wrap: wrap; gap: 6px; }
.sensor-chip {
    display: inline-block;
    padding: 3px 10px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 999px;
    font-size: 12px;
}
.lot-actions { display: flex; gap: 8px; margin-bottom: 16px; }

/* ── Explorer ───────────────────────────────────────── */
.explorer-layout {
    display: flex;
    height: calc(100vh - var(--nav-h));
}
.explorer-sidebar {
    width: var(--sidebar-w);
    min-width: var(--sidebar-w);
    background: var(--surface);
    border-right: 1px solid var(--border);
    overflow-y: auto;
    padding: 12px;
}
.explorer-sidebar h3 { margin-bottom: 8px; }
.explorer-main { flex: 1; overflow-y: auto; padding: 20px; }
.explorer-controls {
    display: flex;
    align-items: flex-end;
    gap: 12px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}
.explorer-controls label { font-size: 12px; }
.explorer-controls input[type="datetime-local"] { width: 200px; margin-bottom: 0; }

/* ── Device tree (shared) ───────────────────────────── */
.device-tree, .device-tree-select { font-size: 13px; }
.device-node { margin-bottom: 4px; }
.device-header, .device-header-check {
    padding: 6px 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    border-radius: var(--radius);
}
.device-header:hover, .device-header-check:hover { background: var(--bg); }
.tree-toggle { font-size: 10px; color: var(--text-muted); width: 14px; }
.sensor-list-tree { padding-left: 26px; }
.sensor-check {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 3px 0;
    cursor: pointer;
    font-size: 13px;
}
.sensor-check input { width: auto; margin-bottom: 0; }

/* ── Admin views ────────────────────────────────────── */
.admin-view { padding: 20px; max-width: 1000px; }
.admin-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}
.filter-bar {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
}
.filter-bar input, .filter-bar select { margin-bottom: 0; }
.filter-bar input { flex: 1; max-width: 300px; }
.filter-bar select { width: 160px; }

/* ── Modal ──────────────────────────────────────────── */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
}
.modal-box {
    background: var(--surface);
    border-radius: 8px;
    padding: 24px;
    width: 400px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 8px 30px rgba(0,0,0,0.15);
}
.modal-box.modal-wide { width: 600px; }
.modal-actions { display: flex; gap: 8px; margin-top: 16px; justify-content: flex-end; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 16px; }
.form-error { color: var(--danger); font-size: 13px; margin-bottom: 8px; }

/* ── Login ──────────────────────────────────────────── */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: var(--bg);
}
.login-box {
    background: var(--surface);
    padding: 32px;
    border-radius: 8px;
    width: 360px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}
.login-box h2 { margin-bottom: 20px; text-align: center; }
.login-box .btn-primary { width: 100%; margin-top: 8px; }

/* ── Cold start overlay ─────────────────────────────── */
.cold-start-overlay {
    position: fixed;
    inset: 0;
    background: rgba(255,255,255,0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 300;
}
.cold-start-box {
    text-align: center;
    padding: 32px;
}
.cold-start-box p { margin-top: 12px; color: var(--text-muted); }

/* ── Role select in table ───────────────────────────── */
.role-select {
    width: auto;
    padding: 3px 6px;
    font-size: 12px;
    margin-bottom: 0;
}

/* ── Report viewer ─────────────────────────────────── */
.report-upload-section {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - var(--nav-h));
    padding: 32px;
}
.report-upload-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 32px;
    max-width: 540px;
    width: 100%;
}
.report-upload-card h2 { margin-bottom: 4px; }
.report-upload-card p { color: var(--text-muted); font-size: 13px; margin-bottom: 16px; }
.report-upload-card .btn-primary { width: 100%; margin-top: 12px; }
.report-drop-zone {
    border: 2px dashed var(--border);
    border-radius: 8px;
    padding: 36px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.15s;
    background: var(--bg);
    font-size: 14px;
    color: var(--text-muted);
}
.report-drop-zone:hover, .report-drop-zone.drag-over {
    border-color: var(--primary);
    background: #eff6ff;
}
.report-progress { margin-top: 12px; }
.report-progress-bar-wrap {
    background: var(--bg);
    border-radius: var(--radius);
    height: 6px;
    overflow: hidden;
}
.report-progress-bar {
    height: 100%;
    background: var(--primary);
    border-radius: var(--radius);
    transition: width 0.3s;
    width: 0%;
}
.report-toolbar {
    padding: 8px 20px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
}
.report-stream-bar {
    padding: 8px 20px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}
.report-layout {
    display: flex;
    min-height: calc(100vh - var(--nav-h) - 40px);
}
.report-sidebar {
    width: 280px;
    min-width: 280px;
    background: var(--surface);
    border-right: 1px solid var(--border);
    overflow-y: auto;
    position: sticky;
    top: var(--nav-h);
    height: calc(100vh - var(--nav-h));
    padding: 8px 0;
}
.report-sidebar-group {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    font-weight: 700;
    padding: 10px 16px 4px;
}
.report-sidebar-item {
    padding: 7px 16px;
    font-size: 13px;
    color: var(--text-muted);
    cursor: pointer;
    transition: background 0.1s;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.report-sidebar-item:hover { background: var(--bg); color: var(--text); }
.report-sidebar-item.active { background: var(--primary); color: #fff; }
.report-sidebar-item.loading { font-style: italic; }
.report-sidebar-item.loading::after {
    content: " ...";
    animation: report-ellipsis 1.2s steps(3, end) infinite;
}
@keyframes report-ellipsis {
    0%   { content: " ."; }
    33%  { content: " .."; }
    66%  { content: " ..."; }
}
.report-main {
    flex: 1;
    padding: 20px 28px;
    overflow-y: auto;
    min-width: 0;
}
.report-query-view { display: none; }
.report-query-view.active { display: block; }
.report-query-title { font-size: 1.2rem; font-weight: 700; margin-bottom: 2px; }
.report-query-subtitle { font-size: 12px; color: var(--text-muted); margin-bottom: 16px; }
.report-loading-msg {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 48px 20px;
    color: var(--text-muted);
    font-size: 14px;
    font-style: italic;
}
.report-chart-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: 16px;
    overflow: hidden;
}
.report-card-header {
    padding: 10px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid var(--border);
    font-size: 13px;
}
.report-card-dates {
    padding: 5px 16px;
    font-size: 12px;
    color: var(--text-muted);
    background: var(--bg);
    border-bottom: 1px solid var(--border);
}
.report-chart-wrap {
    padding: 12px;
    position: relative;
}
.report-chart-wrap canvas { width: 100% !important; height: 300px !important; }
.report-chart-wrap-tall canvas { height: 380px !important; }
.report-data-toggle {
    padding: 8px 16px;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 12px;
    color: var(--text-muted);
    user-select: none;
}
.report-data-toggle:hover { background: var(--bg); }
.report-toggle-arrow { transition: transform 0.2s; display: inline-block; }
.report-data-toggle.open .report-toggle-arrow { transform: rotate(90deg); }
.report-data-panel {
    display: none;
    max-height: 400px;
    overflow: auto;
    border-top: 1px solid var(--border);
}
.report-data-panel.open { display: block; }
.report-val-breach { color: var(--danger); font-weight: 600; }
.report-combined-card { margin-top: 8px; }

/* ── Sensor group management ───────────────────────── */
.sg-sensor-picker { max-height: 400px; overflow-y: auto; }
.sg-sensor-row {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 2px 0;
}
.sg-sensor-row .sensor-check { flex: 1; min-width: 0; }
.sg-limits {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
}
.sg-limit-input {
    width: 72px !important;
    padding: 4px 6px !important;
    font-size: 12px !important;
    margin-bottom: 0 !important;
}
.sg-group-list { max-height: 400px; overflow-y: auto; }
.sg-group-check {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    cursor: pointer;
    border-bottom: 1px solid var(--border);
    font-size: 13px;
}
.sg-group-check:hover { background: var(--bg); }
.sg-group-check input { width: auto; margin-bottom: 0; flex-shrink: 0; }
.sg-group-name { font-weight: 600; white-space: nowrap; }
.sg-group-meta { color: var(--text-muted); font-size: 12px; overflow: hidden; text-overflow: ellipsis; }

/* ── Misc links ─────────────────────────────────────── */
a { color: var(--primary); }
a:hover { text-decoration: underline; }