/* ============================================================================
   PLACEHOLDER THEME
   Colors below are neutral defaults. Once the menu/background reference
   images are provided, replace the --sidebar-bg, --accent, --content-bg
   variables (and the brand mark in _Layout.cshtml) to match exactly.
   ============================================================================ */
:root {
    --sidebar-bg: #1f2a37;
    --sidebar-text: #cbd5e1;
    --sidebar-text-active: #ffffff;
    --accent: #2563eb;
    --content-bg: #f4f6f8;
    --card-bg: #ffffff;
    --border: #e2e8f0;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --success: #16a34a;
    --danger: #dc2626;
    --warning: #d97706;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: "Segoe UI", Arial, sans-serif;
    color: var(--text-primary);
    background: var(--content-bg);
}

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

.sidebar {
    width: 240px;
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    padding: 16px 0;
    flex-shrink: 0;
}
.brand { display: flex; align-items: center; gap: 10px; padding: 8px 16px 20px; }
.brand-mark {
    background: var(--accent); color: #fff; font-weight: 700;
    width: 36px; height: 36px; border-radius: 8px;
    display: flex; align-items: center; justify-content: center; font-size: 13px;
}
.brand-text { font-weight: 600; font-size: 14px; color: var(--sidebar-text-active); }

.menu { display: flex; flex-direction: column; }
.menu-section {
    font-size: 11px; text-transform: uppercase; letter-spacing: .05em;
    color: #8896a6; padding: 16px 16px 6px;
}
.menu a {
    color: var(--sidebar-text); text-decoration: none; padding: 8px 16px;
    font-size: 14px; border-left: 3px solid transparent;
}
.menu a:hover { background: rgba(255,255,255,0.06); color: var(--sidebar-text-active); }

.main-column { flex: 1; display: flex; flex-direction: column; min-width: 0; }

.topbar {
    height: 56px; background: var(--card-bg); border-bottom: 1px solid var(--border);
    display: flex; align-items: center; justify-content: space-between; padding: 0 24px;
}
.topbar-title { font-weight: 600; font-size: 16px; }
.topbar-user { font-size: 13px; color: var(--text-secondary); display: flex; gap: 12px; align-items: center; }

.content { padding: 24px; flex: 1; }

.alert { padding: 10px 14px; border-radius: 6px; margin-bottom: 16px; font-size: 14px; }
.alert-success { background: #ecfdf5; color: var(--success); border: 1px solid #a7f3d0; }
.alert-error { background: #fef2f2; color: var(--danger); border: 1px solid #fecaca; }

.card { background: var(--card-bg); border: 1px solid var(--border); border-radius: 8px; padding: 20px; margin-bottom: 20px; }
.card h2, .card h3 { margin-top: 0; }

table.grid { width: 100%; border-collapse: collapse; font-size: 14px; }
table.grid th, table.grid td { border: 1px solid var(--border); padding: 8px 10px; text-align: left; }
table.grid th { background: #f8fafc; font-weight: 600; }

.form-group { margin-bottom: 14px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 4px; }
.form-control {
    width: 100%; padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px; font-size: 14px;
}
.form-row { display: flex; gap: 16px; flex-wrap: wrap; }
.form-row .form-group { flex: 1; min-width: 200px; }

.btn {
    display: inline-block; padding: 8px 16px; border-radius: 6px; font-size: 14px;
    border: 1px solid transparent; cursor: pointer; text-decoration: none;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-secondary { background: #fff; color: var(--text-primary); border-color: var(--border); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-success { background: var(--success); color: #fff; }

.status-badge {
    display: inline-block; padding: 2px 10px; border-radius: 12px; font-size: 12px; font-weight: 600;
}
.status-pending { background: #fef3c7; color: var(--warning); }
.status-approved { background: #dcfce7; color: var(--success); }
.status-rejected { background: #fee2e2; color: var(--danger); }
.status-draft { background: #e5e7eb; color: var(--text-secondary); }

.link-button { background: none; border: none; color: var(--accent); cursor: pointer; font-size: 13px; padding: 0; }
.inline-form { display: inline; }

.po-print { max-width: 900px; margin: 0 auto; background: #fff; padding: 32px; }
.po-print table { width: 100%; border-collapse: collapse; }
.po-print th, .po-print td { border: 1px solid #000; padding: 6px 8px; font-size: 13px; }