:root {
    --navy-950: #0f1b2d;
    --navy-900: #142640;
    --navy-800: #1c3357;
    --navy-700: #274674;
    --ink: #1a2233;
    --ink-soft: #4b5568;
    --border: #dfe3ea;
    --border-soft: #eceff3;
    --bg: #f4f6f9;
    --card: #ffffff;
    --accent: #2f5fb3;
    --accent-dark: #1f4384;
    --green: #1a7f4e;
    --green-bg: #e5f5ec;
    --amber: #9a6400;
    --amber-bg: #fdf1da;
    --red: #b3261e;
    --red-bg: #fce8e6;
    --gray-bg: #eef0f3;
    --radius: 8px;
    --sidebar-w: 230px;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    font-size: 14px;
    line-height: 1.5;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 { margin: 0 0 .5em; font-weight: 600; color: var(--navy-950); }
h1 { font-size: 22px; }
h2 { font-size: 18px; }
h3 { font-size: 15px; }
p { margin: 0 0 1em; }

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

/* Sidebar */
.sidebar {
    width: var(--sidebar-w);
    flex-shrink: 0;
    background: var(--navy-950);
    color: #cdd7e6;
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
}
.sidebar .brand {
    padding: 18px 20px;
    font-weight: 700;
    font-size: 16px;
    color: #fff;
    border-bottom: 1px solid rgba(255,255,255,.08);
    letter-spacing: .2px;
}
.sidebar .brand small {
    display: block;
    font-weight: 400;
    font-size: 11px;
    color: #93a2ba;
    margin-top: 2px;
}
.sidebar nav { padding: 10px; flex: 1; }
.sidebar nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 12px;
    border-radius: 6px;
    color: #cdd7e6;
    font-size: 13.5px;
    font-weight: 500;
    text-decoration: none;
    margin-bottom: 2px;
}
.sidebar nav a:hover { background: rgba(255,255,255,.06); text-decoration: none; }
.sidebar nav a.active { background: var(--accent); color: #fff; }
.sidebar .user-box {
    padding: 14px 18px;
    border-top: 1px solid rgba(255,255,255,.08);
    font-size: 12.5px;
}
.sidebar .user-box .name { color: #fff; font-weight: 600; }
.sidebar .user-box a { color: #93a2ba; }

/* Main column */
.main {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
}
.topbar {
    background: #fff;
    border-bottom: 1px solid var(--border);
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.topbar form.search { flex: 1; max-width: 360px; }
.topbar input[type=search] {
    width: 100%;
}
.content { padding: 24px; flex: 1; }

.page-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 18px;
}
.page-head .actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* Cards */
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px 20px;
    margin-bottom: 18px;
}
.card-title {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: .04em;
    color: var(--ink-soft);
    margin-bottom: 6px;
    font-weight: 600;
}
.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 14px;
    margin-bottom: 18px;
}
.stat-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 18px;
}
.stat-card .value { font-size: 24px; font-weight: 700; color: var(--navy-950); }
.stat-card .label { font-size: 12.5px; color: var(--ink-soft); margin-top: 2px; }
.stat-card.warn .value { color: var(--red); }

.two-col {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 18px;
    align-items: start;
}
@media (max-width: 900px) {
    .two-col { grid-template-columns: 1fr; }
}

/* Tables */
table { width: 100%; border-collapse: collapse; }
th, td {
    text-align: left;
    padding: 9px 10px;
    border-bottom: 1px solid var(--border-soft);
    font-size: 13.5px;
    vertical-align: middle;
}
th {
    font-size: 11.5px;
    text-transform: uppercase;
    letter-spacing: .03em;
    color: var(--ink-soft);
    font-weight: 600;
    background: #fafbfc;
}
tbody tr:hover { background: #f8fafc; }
.table-wrap { overflow-x: auto; }
td.num, th.num { text-align: right; }
.empty-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--ink-soft);
}
.empty-state h3 { color: var(--ink-soft); }

/* Badges */
.badge {
    display: inline-block;
    padding: 2px 9px;
    border-radius: 100px;
    font-size: 11.5px;
    font-weight: 600;
    white-space: nowrap;
}
.badge-green { background: var(--green-bg); color: var(--green); }
.badge-amber { background: var(--amber-bg); color: var(--amber); }
.badge-red { background: var(--red-bg); color: var(--red); }
.badge-gray { background: var(--gray-bg); color: var(--ink-soft); }
.badge-blue { background: #e6eefc; color: var(--accent-dark); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: #fff;
    color: var(--ink);
    font-size: 13.5px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    line-height: 1.2;
}
.btn:hover { background: #f5f7fa; text-decoration: none; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); }
.btn-danger { color: var(--red); border-color: #f0c9c6; }
.btn-danger:hover { background: var(--red-bg); }
.btn-sm { padding: 5px 10px; font-size: 12.5px; }
.btn-block { width: 100%; justify-content: center; }

/* Forms */
label { display: block; font-weight: 600; font-size: 12.5px; margin-bottom: 4px; color: var(--ink); }
.form-row { margin-bottom: 14px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 700px) { .form-grid { grid-template-columns: 1fr; } }
input[type=text], input[type=email], input[type=password], input[type=date],
input[type=number], input[type=search], input[type=datetime-local], input[type=tel],
select, textarea {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 13.5px;
    font-family: inherit;
    background: #fff;
    color: var(--ink);
}
textarea { resize: vertical; min-height: 70px; }
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(47,95,179,.15);
}
.help-text { font-size: 12px; color: var(--ink-soft); margin-top: 3px; }
.checkbox-row { display: flex; align-items: center; gap: 8px; }
.checkbox-row input { width: auto; }

/* Tabs */
.tabs {
    display: flex;
    gap: 2px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 18px;
    flex-wrap: wrap;
}
.tabs a {
    padding: 9px 14px;
    font-size: 13.5px;
    font-weight: 600;
    color: var(--ink-soft);
    border-bottom: 2px solid transparent;
    text-decoration: none;
}
.tabs a.active { color: var(--accent-dark); border-bottom-color: var(--accent); }
.tabs a:hover { color: var(--accent-dark); text-decoration: none; }

/* Flash messages */
.flash { padding: 10px 14px; border-radius: 6px; margin-bottom: 16px; font-size: 13.5px; }
.flash-success { background: var(--green-bg); color: var(--green); }
.flash-error { background: var(--red-bg); color: var(--red); }
.flash-info { background: #e6eefc; color: var(--accent-dark); }

/* Misc */
.muted { color: var(--ink-soft); }
.text-right { text-align: right; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-8 { gap: 8px; }
.timeline-item { padding: 10px 0; border-bottom: 1px solid var(--border-soft); font-size: 13px; }
.timeline-item .when { color: var(--ink-soft); font-size: 12px; }
.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--navy-950);
}
.login-card {
    background: #fff;
    border-radius: 10px;
    padding: 36px 34px;
    width: 100%;
    max-width: 380px;
    box-shadow: 0 20px 60px rgba(0,0,0,.35);
}
.login-card h1 { text-align: center; margin-bottom: 4px; }
.login-card .subtitle { text-align: center; color: var(--ink-soft); margin-bottom: 24px; font-size: 13px; }
.print-only { display: none; }

@media (max-width: 780px) {
    .app-shell { flex-direction: column; }
    .sidebar {
        width: 100%;
        height: auto;
        position: static;
        flex-direction: row;
        flex-wrap: wrap;
        align-items: center;
    }
    .sidebar .brand { border-bottom: none; padding: 14px 16px; width: 100%; }
    .sidebar nav {
        display: flex;
        overflow-x: auto;
        padding: 4px 10px 10px;
        gap: 2px;
        flex: none;
        width: 100%;
    }
    .sidebar nav a { white-space: nowrap; margin-bottom: 0; }
    .sidebar .user-box { width: 100%; border-top: 1px solid rgba(255,255,255,.08); }
    .topbar { flex-wrap: wrap; }
    .topbar form.search { max-width: none; order: 2; flex-basis: 100%; }
    .content { padding: 16px; }
    .stat-grid { grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }
}

@media print {
    .no-print { display: none !important; }
    .print-only { display: block; }
    body { background: #fff; }
    .content { padding: 0; }
}