:root {
    --navy: #10233f;
    --navy-dark: #0a1730;
    --accent: #1b6fb0;
    --accent-light: #e8f2fb;
    --border: #dbe2ea;
    --text: #1f2733;
    --muted: #64748b;
    --green: #1b8a5a;
    --red: #c0392b;
    --amber: #b8860b;
    --bg: #f4f7fb;
    --surface: #ffffff;
}
body.dark {
    --navy: #0d1a2e;
    --navy-dark: #060d1a;
    --accent: #4a9fd8;
    --accent-light: #17293d;
    --border: #2c3a4d;
    --text: #e6edf5;
    --muted: #93a3b8;
    --green: #2fbd7e;
    --red: #e2665a;
    --amber: #d9a441;
    --bg: #0f1722;
    --surface: #16202e;
}
body.dark table tr:hover td { background: #1b2635; }
body.dark input[type=text], body.dark input[type=password], body.dark input[type=date],
body.dark input[type=number], body.dark select, body.dark textarea {
    background: var(--surface);
    color: var(--text);
    border-color: var(--border);
}
body.dark .login-wrap, body.dark .card { background: var(--surface); }
body.dark th { background: var(--accent-light); color: #cfe3f5; }
* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: 'Segoe UI', Arial, Helvetica, sans-serif;
    background: var(--bg);
    color: var(--text);
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
    background: var(--navy);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 24px;
    flex-wrap: wrap;
    gap: 10px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-icon {
    background: #fff;
    color: var(--navy);
    font-weight: 700;
    width: 40px; height: 40px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 14px;
}
.brand-title { font-weight: 700; font-size: 15px; letter-spacing: .3px; }
.brand-sub { font-size: 12px; color: #b7c4d9; }

.topnav { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.topnav a { color: #dbe8f7; font-size: 14px; }
.topnav a:hover { color: #fff; }
.nav-user { color: #9fb3cc; font-size: 13px; margin-left: 8px; }
.logout-link {
    background: var(--accent);
    color: #fff !important;
    padding: 6px 14px;
    border-radius: 6px;
}
.logout-link:hover { background: #145a8c; text-decoration: none; }

.page-wrap { max-width: 1100px; margin: 24px auto; padding: 0 20px 40px; }

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 22px;
    margin-bottom: 20px;
    box-shadow: 0 1px 2px rgba(16,35,63,0.04);
}
.card h2, .card h3 { margin-top: 0; }

.page-header {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 16px; flex-wrap: wrap; gap: 10px;
}
.page-header h1 { font-size: 22px; margin: 0; }

.btn {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    border: none;
    padding: 9px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
}
.btn:hover { background: #145a8c; text-decoration: none; color: #fff; }
.btn-secondary { background: #eef2f7; color: var(--text); }
.btn-secondary:hover { background: #e0e6ed; color: var(--text); }
.btn-danger { background: var(--red); }
.btn-danger:hover { background: #96291e; }
.btn-sm { padding: 5px 10px; font-size: 12px; }

table { width: 100%; border-collapse: collapse; }
th, td {
    text-align: left;
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
}
th { background: var(--accent-light); color: var(--navy); font-weight: 600; }
tr:hover td { background: #fafcff; }

.form-group { margin-bottom: 16px; }
label { display: block; font-weight: 600; margin-bottom: 6px; font-size: 14px; }
input[type=text], input[type=password], input[type=date], input[type=number],
select, textarea {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    background: var(--surface);
}
textarea { resize: vertical; }
/* Full rich-text editor used by results, remarks and comment templates. */
.richtext-toolbar { display:flex; gap:4px; flex-wrap:wrap; margin-bottom:4px; padding:5px; border:1px solid var(--border); border-radius:6px 6px 0 0; background:#f8fafc; }
.richtext-toolbar button, .richtext-toolbar select {
    height:30px; border:1px solid var(--border); border-radius:5px;
    background:var(--surface); cursor:pointer; font-size:13px; color:var(--navy);
    padding:0 7px;
}
.richtext-toolbar button { min-width:30px; }
.richtext-toolbar button:hover, .richtext-toolbar select:hover { background:var(--accent-light); }
.richtext-toolbar button.active { background:var(--accent); color:#fff; border-color:var(--accent); }
.richtext-editor {
    width:100%; min-height:120px; padding:10px 12px; border:1px solid var(--border);
    border-radius:0 0 6px 6px; font-size:14px; background:var(--surface); line-height:1.55;
    overflow:auto;
}
.richtext-editor:empty:before { content:attr(data-placeholder); color:#94a3b8; }
.richtext-editor[contenteditable="false"] { background:#f1f5f9; color:#64748b; }
.richtext-editor h1,.richtext-editor h2,.richtext-editor h3 { margin:8px 0 4px; }
.richtext-editor ul,.richtext-editor ol { margin:4px 0 8px 24px; }
.richtext-editor blockquote { margin:6px 0; padding-left:12px; border-left:3px solid var(--border); color:#64748b; }
.richtext-editor table, .result-rich-table { border-collapse:collapse; width:100%; margin:8px 0; }
.richtext-editor th,.richtext-editor td,.result-rich-table th,.result-rich-table td {
    border:1px solid var(--border); padding:6px 8px; min-width:55px; vertical-align:top;
}
.richtext-editor th,.result-rich-table th { font-weight:700; background:#f8fafc; }
.richtext-table-wrap { overflow-x:auto; margin:6px 0; }
.richtext-help { color:#64748b; font-size:12px; margin:5px 0 0; }
.form-row { display: flex; gap: 16px; flex-wrap: wrap; }
.form-row .form-group { flex: 1; min-width: 200px; }

.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}
.badge-pending { background: #fdf1d6; color: var(--amber); }
.badge-completed { background: #dceffb; color: var(--accent); }
.badge-approved { background: #dcf3e6; color: var(--green); }
.badge-voided { background: #fde8e8; color: var(--red); }
.badge-high { background: #fde8e8; color: var(--red); }
.badge-low { background: #fdf1d6; color: var(--amber); }

.alert { padding: 12px 16px; border-radius: 6px; margin-bottom: 16px; font-size: 14px; }
.alert-error { background: #fdecea; color: var(--red); border: 1px solid #f5c6c1; }
.alert-success { background: #e8f8ee; color: var(--green); border: 1px solid #bfe8cf; }

.login-wrap {
    max-width: 380px;
    margin: 60px auto;
    background: var(--surface);
    padding: 32px;
    border-radius: 10px;
    border: 1px solid var(--border);
    box-shadow: 0 2px 10px rgba(16,35,63,0.06);
}
.login-wrap h1 { font-size: 18px; text-align: center; margin-bottom: 4px; }
.login-wrap p.sub { text-align: center; color: var(--muted); font-size: 13px; margin-top: 0; margin-bottom: 24px; }

.category-block { margin-bottom: 18px; }
.category-block h4 {
    background: var(--navy);
    color: #fff;
    padding: 8px 12px;
    border-radius: 6px 6px 0 0;
    margin: 0;
    font-size: 13px;
    letter-spacing: .4px;
}
.category-tests {
    border: 1px solid var(--border);
    border-top: none;
    border-radius: 0 0 6px 6px;
    padding: 10px 14px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 6px 16px;
}
.checkbox-row { display: flex; align-items: center; gap: 8px; font-size: 13px; }
.checkbox-row input { width: auto; }

.result-row { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 12px; align-items: center; padding: 8px 0; border-bottom: 1px solid var(--border); }
.result-row:last-child { border-bottom: none; }
.result-row .test-name { font-weight: 600; font-size: 14px; }
.result-row .test-range { font-size: 12px; color: var(--muted); }

.signature-preview img { max-width: 220px; border: 1px solid var(--border); border-radius: 6px; padding: 6px; background:#fff; }

.footer {
    text-align: center;
    color: var(--muted);
    font-size: 12px;
    padding: 20px;
}

.stat-cards { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 20px; }
.stat-card { flex: 1; min-width: 160px; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 16px; text-align: center; }
.stat-card .num { font-size: 28px; font-weight: 700; color: var(--navy); }
.stat-card .label { color: var(--muted); font-size: 13px; }

/* Universal rich-text result editor: every test uses the same full editor. */
.result-rich-card { background: #fff; }
.result-rich-heading { display:flex; justify-content:space-between; align-items:flex-start; gap:16px; margin-bottom:7px; }
.result-editor-meta { color:#64748b; font-size:12px; white-space:nowrap; }
.result-rich-editor { min-height:150px; background:#fff; border:1px solid var(--border); border-radius:0 0 7px 7px; padding:12px; line-height:1.55; overflow:auto; }
.result-rich-editor:focus { outline:2px solid var(--accent-light); border-color:var(--accent); }
.result-rich-editor table { min-width:420px; }
.result-rich-preview table { border-collapse:collapse; width:100%; }
.result-rich-preview th,.result-rich-preview td { border:1px solid #cbd5e1; padding:5px 7px; }
.table-btn { font-weight:700; }

/* Collapsible application sidebar navigation */
.topbar { position: sticky; top: 0; z-index: 1100; min-height: 64px; }
.topbar-left { display:flex; align-items:center; gap:12px; min-width:0; }
.topbar-actions { display:flex; align-items:center; gap:10px; }
.sidebar-toggle { width:40px; height:40px; border:1px solid rgba(255,255,255,.2); background:rgba(255,255,255,.08); color:#fff; border-radius:7px; cursor:pointer; font-size:22px; line-height:1; }
.sidebar-toggle:hover { background:rgba(255,255,255,.16); }
.app-sidebar { position:fixed; top:64px; left:0; bottom:0; width:260px; background:var(--navy-dark); color:#dbe8f7; z-index:1050; overflow-y:auto; box-shadow:3px 0 14px rgba(0,0,0,.12); transition:transform .22s ease, width .22s ease; }
.app-sidebar.closed { transform:translateX(-100%); }
.sidebar-header { height:52px; display:flex; align-items:center; justify-content:space-between; padding:0 14px 0 20px; font-size:12px; text-transform:uppercase; letter-spacing:.08em; color:#9fb3cc; border-bottom:1px solid rgba(255,255,255,.08); }
.sidebar-close { display:none; border:0; background:transparent; color:#dbe8f7; font-size:26px; cursor:pointer; }
.side-nav { padding:10px 10px 24px; }
.side-nav a { display:flex; align-items:center; gap:11px; min-height:42px; padding:9px 12px; margin:2px 0; border-radius:7px; color:#dbe8f7; font-size:13px; text-decoration:none; transition:background .15s ease,color .15s ease; }
.side-nav a span { width:20px; text-align:center; flex:0 0 20px; font-size:15px; }
.side-nav a:hover { background:rgba(255,255,255,.08); color:#fff; text-decoration:none; }
.side-nav a.active { background:var(--accent); color:#fff; font-weight:600; }
.side-nav .side-logout { margin-top:8px; background:rgba(192,57,43,.15); color:#ffb4ad; }
.side-nav .side-logout:hover { background:rgba(192,57,43,.28); color:#fff; }
.side-nav-divider { height:1px; background:rgba(255,255,255,.08); margin:10px 6px; }
.nav-count { margin-left:auto; background:#c0392b; color:#fff; border-radius:12px; padding:1px 7px; font-size:11px; }
.critical-nav:not(.active) { color:#ffb4ad !important; }
.page-wrap { margin-left:260px; max-width:none; width:auto; padding-left:28px; padding-right:28px; transition:margin-left .22s ease; }
body.sidebar-closed .page-wrap { margin-left:0; }
.sidebar-overlay { display:none; }
@media (max-width:899px) {
    .topbar { padding:10px 14px; }
    .topbar-actions .nav-user { display:none; }
    .app-sidebar { top:0; width:min(300px,86vw); z-index:1200; }
    .sidebar-close { display:block; }
    .sidebar-overlay { position:fixed; inset:0; background:rgba(0,0,0,.45); z-index:1150; }
    .sidebar-overlay.show { display:block; }
    .page-wrap { margin-left:0; padding:18px 14px 32px; }
    body.sidebar-closed .page-wrap { margin-left:0; }
    .topbar-actions .btn { display:none; }
}