/* ── CSS Custom Properties ──────────────────────────────── */
:root {
    --color-sidebar-bg:    #002E62;
    --color-sidebar-text:  rgba(255,255,255,.65);
    --color-accent:        #0078D4;
    --color-accent-hover:  #006BBF;
    --color-bg:            #f7fafc;
    --color-surface:       #ffffff;
    --color-border:        #e2e8f0;
    --color-text:          #1a202c;
    --color-text-muted:    #718096;
    --color-success:       #48bb78;
    --color-warning:       #ecc94b;
    --color-danger:        #e53e3e;
    --sidebar-width:       260px;
    --sidebar-collapsed:   70px;
    --topbar-height:       52px;
    --radius:              8px;
    --shadow-sm:           0 1px 3px rgba(0,0,0,0.08);
    --shadow-md:           0 4px 12px rgba(0,0,0,0.10);
    --transition:          0.2s ease;
}

/* ── Reset & Base ───────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { overflow-x: hidden; }
html { font-size: 16px; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Inter', sans-serif;
       background: var(--color-bg); color: var(--color-text); line-height: 1.5; }
:root { --color-bg: #f4f6fb; }
a { color: var(--color-accent); text-decoration: none; }
a:hover { color: var(--color-accent-hover); }

/* ── App Shell ──────────────────────────────────────────── */
.app-body { display: flex; min-height: 100vh; }
.app-main  { flex: 1; display: flex; flex-direction: column; min-width: 0;
             margin-left: var(--sidebar-width); transition: margin-left var(--transition); }
.app-body.sidebar-collapsed .app-main { margin-left: var(--sidebar-collapsed); }
.app-content { flex: 1; padding: 24px; overflow-x: auto; }

/* ── Sidebar ────────────────────────────────────────────── */
.sidebar { position: fixed; top: 0; left: 0; bottom: 0; width: var(--sidebar-width);
           background: linear-gradient(180deg, #003270 0%, #001f4d 100%);
           display: flex; flex-direction: column;
           overflow: hidden; transition: width var(--transition); z-index: 200;
           box-shadow: 2px 0 12px rgba(0,0,0,.18); }
.app-body.sidebar-collapsed .sidebar { width: var(--sidebar-collapsed); }

.sidebar-logo { display: flex; align-items: center; gap: 10px; padding: 14px;
                border-bottom: 1px solid rgba(255,255,255,0.08); flex-shrink: 0; }
.sidebar-logo-icon { width: 28px; height: 28px; background: var(--color-accent);
                     border-radius: 6px; flex-shrink: 0; display: flex; align-items: center;
                     justify-content: center; overflow: hidden; }
.sidebar-logo-icon img, .sidebar-logo-icon span { width: 28px; height: 28px;
    object-fit: contain; font-size: 10px; font-weight: 800; color: #fff;
    display: flex; align-items: center; justify-content: center; }
.sidebar-logo-text { color: #e8f0fe; font-size: 14px; font-weight: 700;
                     white-space: nowrap; overflow: hidden; }

.sidebar-nav { flex: 1; overflow-y: auto; overflow-x: hidden; padding: 8px 0; }
.nav-group { margin-bottom: 4px; }
.nav-group-label { padding: 10px 14px 4px; font-size: 0.62rem; font-weight: 700;
                   text-transform: uppercase; letter-spacing: 0.1em;
                   color: rgba(255,255,255,.3); white-space: nowrap; overflow: hidden; }
.nav-item { display: flex; align-items: center; gap: 10px; padding: 7px 14px;
            color: var(--color-sidebar-text); white-space: nowrap; overflow: hidden;
            transition: all .15s; border-radius: 0;
            border-left: 3px solid transparent; }
.nav-item:hover { background: rgba(255,255,255,.07); color: #fff;
                  border-left-color: rgba(255,255,255,.2); }
.nav-item.active { background: rgba(255,255,255,.1); color: #fff;
                   border-left-color: #60A5FA; }

/* ── Submenu ─────────────────────────────────────────────── */
.nav-toggle { width: 100%; background: none; border: none; cursor: pointer; text-align: left;
              border-left: 3px solid transparent; transition: all .15s; }
.nav-toggle:hover { background: rgba(255,255,255,.07); color: #fff;
                    border-left-color: rgba(255,255,255,.2); }
.nav-toggle.active { background: rgba(255,255,255,.1); color: #fff;
                     border-left-color: #60A5FA; }
.nav-toggle:focus-visible { outline: 2px solid rgba(255,255,255,0.4); outline-offset: -2px; }

.nav-chevron {
    width: 14px; height: 14px; flex-shrink: 0; margin-left: auto;
    display: inline-block; background-color: currentColor;
    -webkit-mask-image: url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'><path fill='black' d='M7 10l5 5 5-5H7z'/></svg>");
    mask-image: url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'><path fill='black' d='M7 10l5 5 5-5H7z'/></svg>");
    -webkit-mask-repeat: no-repeat; mask-repeat: no-repeat;
    -webkit-mask-position: center; mask-position: center;
    -webkit-mask-size: contain; mask-size: contain;
    transition: transform 0.2s ease; opacity: 0.55;
}
.nav-has-sub.open .nav-chevron { transform: rotate(180deg); opacity: 0.8; }

.nav-submenu {
    max-height: 0; overflow: hidden;
    transition: max-height 0.25s ease;
    background: rgba(0,0,0,0.15);
}
.nav-has-sub.open .nav-submenu { max-height: 400px; }

.nav-subitem {
    display: block; padding: 5px 14px 5px 42px;
    font-size: 11.5px; color: rgba(255,255,255,0.6);
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
    transition: background var(--transition), color var(--transition);
    border-left: 2px solid transparent;
}
.nav-subitem:hover { color: #fff; background: rgba(255,255,255,0.06); border-left-color: rgba(255,255,255,0.25); }
.nav-subitem.active { color: #fff; font-weight: 600; border-left-color: #60A5FA; background: rgba(96,165,250,.1); }

/* ── Collapsed / icon-only mode ─────────────────────────── */
.app-body.sidebar-collapsed .sidebar-logo-text { opacity: 0; width: 0; overflow: hidden; }
.app-body.sidebar-collapsed .nav-group-label   { opacity: 0; height: 0; padding: 0; overflow: hidden; }
.app-body.sidebar-collapsed .nav-label         { display: none; }
.app-body.sidebar-collapsed .nav-chevron       { display: none; }
.app-body.sidebar-collapsed .nav-submenu       { display: none !important; }
.app-body.sidebar-collapsed .sidebar-logo-text-sub { display: none; }
.app-body.sidebar-collapsed .nav-item          { padding: .55rem; justify-content: center; gap: 0;
                                                 border-left: 3px solid transparent; }
.app-body.sidebar-collapsed .nav-item.active   { border-left-color: #60A5FA; }
.app-body.sidebar-collapsed .nav-toggle        { padding: .55rem; justify-content: center; gap: 0;
                                                 border-left: 3px solid transparent; }
.app-body.sidebar-collapsed .nav-toggle.active { border-left-color: #60A5FA; }
.app-body.sidebar-collapsed .nav-icon          { margin: 0; }

/* Tooltip on hover when collapsed */
.app-body.sidebar-collapsed .nav-item,
.app-body.sidebar-collapsed .nav-toggle        { position: relative; }
.app-body.sidebar-collapsed .nav-item:hover::after,
.app-body.sidebar-collapsed .nav-toggle:hover::after {
    content: attr(data-label);
    position: absolute; left: calc(var(--sidebar-collapsed) - 4px); top: 50%;
    transform: translateY(-50%);
    background: #1E293B; color: #E2E8F0;
    padding: .35rem .75rem; border-radius: 6px;
    font-size: .8rem; white-space: nowrap;
    box-shadow: 0 4px 12px rgba(0,0,0,.3);
    z-index: 9999; pointer-events: none;
}
/* ── Icons (Bootstrap Icons — font-based) ───────────────── */
.nav-icon {
    font-size: 1rem;
    width: 20px;
    text-align: center;
    flex-shrink: 0;
    line-height: 1;
    opacity: .85;
    transition: opacity .15s;
}
.nav-item:hover .nav-icon,
.nav-item.active .nav-icon,
.nav-toggle:hover .nav-icon,
.nav-toggle.active .nav-icon { opacity: 1; }
.nav-label { font-size: 12.5px; font-weight: 500; overflow: hidden; text-overflow: ellipsis; }

.sidebar-footer { padding: 10px 10px 12px; border-top: 1px solid rgba(255,255,255,0.09);
                  flex-shrink: 0; display: flex; flex-direction: column; gap: 4px; }
.user-chip { display: flex; align-items: center; gap: 9px; padding: 6px 6px; border-radius: 8px;
             transition: background .15s; }
.user-chip:hover { background: rgba(255,255,255,.06); }
.user-avatar { width: 32px; height: 32px; background: linear-gradient(135deg, #3b82f6, #1d4ed8);
               border-radius: 8px; display: flex; align-items: center; justify-content: center;
               font-size: 12px; font-weight: 700; color: #fff; flex-shrink: 0;
               box-shadow: 0 2px 6px rgba(0,0,0,.25); }
.user-avatar.sm { width: 28px; height: 28px; font-size: 11px; border-radius: 6px; }
.user-info { overflow: hidden; flex: 1; }
.user-name { font-size: 12px; color: rgba(255,255,255,.9); font-weight: 600;
             white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.user-role { font-size: 10px; color: rgba(255,255,255,.4); text-transform: capitalize; }
.sidebar-logout { display: flex; align-items: center; gap: 9px; padding: 6px 6px;
                  border-radius: 8px; color: rgba(255,255,255,.45); font-size: 12px;
                  transition: all .15s; text-decoration: none; }
.sidebar-logout:hover { background: rgba(239,68,68,.15); color: #fca5a5; }
.sidebar-logout i { font-size: 1rem; width: 20px; text-align: center; }
.app-body.sidebar-collapsed .sidebar-logout .nav-label { display: none; }
.app-body.sidebar-collapsed .user-info { display: none; }
.app-body.sidebar-collapsed .sidebar-footer { padding: 10px 8px 12px; }
.app-body.sidebar-collapsed .user-chip { justify-content: center; padding: 6px 4px; }
.app-body.sidebar-collapsed .sidebar-logout { justify-content: center; padding: 6px 4px; }

/* ── Topbar ─────────────────────────────────────────────── */
.topbar { height: var(--topbar-height); background: var(--color-surface);
          border-bottom: 1px solid var(--color-border); display: flex; align-items: center;
          gap: 12px; padding: 0 20px; position: sticky; top: 0; z-index: 50;
          box-shadow: 0 1px 0 var(--color-border), 0 2px 8px rgba(0,0,0,.04); }
.topbar-toggle { width: 34px; height: 34px; border-radius: 8px; background: transparent;
                 border: 1px solid var(--color-border); cursor: pointer;
                 display: flex; align-items: center; justify-content: center;
                 color: var(--color-text-muted); font-size: 1.15rem;
                 transition: all var(--transition); }
.topbar-toggle:hover { background: var(--color-bg); color: var(--color-text); border-color: #cbd5e0; }
.topbar-breadcrumb { flex: 1; font-size: 13px; color: var(--color-text-muted);
                     display: flex; align-items: center; gap: 6px; }
.topbar-breadcrumb .bc-sep { opacity: .35; font-size: 11px; }
.topbar-breadcrumb strong { color: var(--color-text); font-weight: 600; }
.topbar-actions { display: flex; align-items: center; gap: 6px; }
.topbar-notif { position: relative; width: 34px; height: 34px; border-radius: 8px;
                background: transparent; border: 1px solid var(--color-border);
                display: flex; align-items: center; justify-content: center;
                color: var(--color-text-muted); font-size: 1.05rem;
                transition: all var(--transition); }
.topbar-notif:hover { background: var(--color-bg); color: var(--color-accent); border-color: #cbd5e0; }
.notif-badge { position: absolute; top: 5px; right: 5px; min-width: 7px; height: 7px;
               background: #ef4444; border-radius: 10px; border: 2px solid #fff;
               font-size: 8px; color: #fff; display: flex; align-items: center;
               justify-content: center; padding: 0 2px; }
.topbar-user-menu { position: relative; cursor: pointer; display: flex; align-items: center;
                    gap: 8px; padding: 4px 8px 4px 4px; border-radius: 8px;
                    border: 1px solid var(--color-border); transition: all var(--transition); }
.topbar-user-menu:hover { background: var(--color-bg); border-color: #cbd5e0; }
.topbar-username { font-size: 12.5px; font-weight: 600; color: var(--color-text); white-space: nowrap; }
.dropdown-menu { display: none; position: absolute; right: 0; top: calc(100% + 6px);
                 background: var(--color-surface); border: 1px solid var(--color-border);
                 border-radius: 10px; box-shadow: 0 8px 24px rgba(0,0,0,.12);
                 min-width: 160px; z-index: 200; padding: 4px; overflow: hidden; }
.dropdown-menu.open { display: block; }
.dropdown-item { display: flex; align-items: center; gap: 8px; padding: 8px 12px;
                 font-size: 13px; border-radius: 7px;
                 color: var(--color-text); transition: background var(--transition); }
.dropdown-item:hover { background: var(--color-bg); color: var(--color-accent); }
.dropdown-divider { height: 1px; background: var(--color-border); margin: 4px 0; }
.dropdown-item.danger { color: #dc2626; }
.dropdown-item.danger:hover { background: #fff5f5; }

/* ── Cards & Widgets ────────────────────────────────────── */
.card { background: var(--color-surface); border: 1px solid var(--color-border);
        border-radius: var(--radius); padding: 16px; }
.card-title { font-size: 12px; font-weight: 700; text-transform: uppercase;
              letter-spacing: 0.5px; color: var(--color-text-muted); margin-bottom: 12px; }
.stat-value { font-size: 28px; font-weight: 700; color: var(--color-text); }
.stat-label { font-size: 12px; color: var(--color-text-muted); margin-top: 2px; }

/* ── Alerts ─────────────────────────────────────────────── */
.alert { padding: 10px 14px; border-radius: 6px; font-size: 13px; margin-bottom: 16px; }
.alert-success { background: #f0fff4; color: #276749; border: 1px solid #c6f6d5; }
.alert-error   { background: #fff5f5; color: #c53030; border: 1px solid #fed7d7; }
.alert-info    { background: #ebf8ff; color: #2b6cb0; border: 1px solid #bee3f8; }

/* ── Forms ──────────────────────────────────────────────── */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 600;
                    color: var(--color-text); margin-bottom: 6px; }
.form-group input, .form-group select, .form-group textarea {
    width: 100%; padding: 8px 12px; border: 1px solid var(--color-border);
    border-radius: 6px; font-size: 14px; color: var(--color-text);
    background: var(--color-surface); transition: border-color var(--transition); }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none; border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(45,107,196,0.15); }

/* ── Buttons ─────────────────────────────────────────────── */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px;
       border-radius: 6px; font-size: 13px; font-weight: 600; cursor: pointer;
       border: none; transition: all var(--transition); }
.btn-primary { background: var(--color-accent); color: #fff; }
.btn-primary:hover { background: var(--color-accent-hover); }
.btn-secondary { background: var(--color-bg); color: var(--color-text);
                 border: 1px solid var(--color-border); }
.btn-danger { background: var(--color-danger); color: #fff; }
.btn-block { width: 100%; justify-content: center; }
.btn-link { background: none; border: none; color: var(--color-accent);
            font-size: 13px; cursor: pointer; padding: 4px 0; display: block; text-align: center; margin-top: 10px; }

/* ── Page header ─────────────────────────────────────────── */
.page-header { margin-bottom: 24px; }
.page-title { font-size: 22px; font-weight: 700; color: var(--color-text); }
.page-subtitle { font-size: 13px; color: var(--color-text-muted); margin-top: 2px; }

/* ── Tables ──────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th { padding: 10px 12px; text-align: left; font-size: 11px; font-weight: 700;
     text-transform: uppercase; letter-spacing: 0.5px; color: var(--color-text-muted);
     border-bottom: 2px solid var(--color-border); }
td { padding: 10px 12px; border-bottom: 1px solid var(--color-border); color: var(--color-text); }
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--color-bg); }

/* ── Badges ──────────────────────────────────────────────── */
.badge { display: inline-block; padding: 2px 8px; border-radius: 10px; font-size: 11px; font-weight: 600; }
.badge-success { background: #f0fff4; color: #276749; }
.badge-warning { background: #fffbeb; color: #92400e; }
.badge-danger  { background: #fff5f5; color: #c53030; }
.badge-info    { background: #ebf8ff; color: #2b6cb0; }
.badge-muted   { background: var(--color-bg); color: var(--color-text-muted); }

/* ── Login page ──────────────────────────────────────────── */
.login-page { display: flex; align-items: center; justify-content: center;
              min-height: 100vh; background: var(--color-bg); }
.login-card { background: var(--color-surface); border: 1px solid var(--color-border);
              border-radius: 12px; padding: 32px; width: 100%; max-width: 380px;
              box-shadow: var(--shadow-md); }
.login-logo { text-align: center; margin-bottom: 24px; }
.login-logo h1 { font-size: 20px; font-weight: 700; margin-top: 8px; }
.login-hint { font-size: 13px; color: var(--color-text-muted); margin-bottom: 16px; }
.totp-qr { text-align: center; margin: 16px 0; }
.totp-manual { font-size: 11px; color: var(--color-text-muted); margin-top: 8px; }
.text-center { text-align: center; }

/* ── Dashboard widgets ───────────────────────────────────── */
.dashboard-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.widget-card { background: var(--color-surface); border: 1px solid var(--color-border);
               border-radius: var(--radius); padding: 16px; min-height: 120px; }
.widget-loading { color: var(--color-text-muted); font-size: 13px; }

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 1024px) {
    .app-body:not(.sidebar-mobile-open) .sidebar { width: var(--sidebar-collapsed); }
    .app-body:not(.sidebar-mobile-open) .app-main { margin-left: var(--sidebar-collapsed); }
}
@media (max-width: 767px) {
    .sidebar { width: var(--sidebar-width); transform: translateX(-100%); transition: transform var(--transition); }
    .app-body.sidebar-mobile-open .sidebar { transform: translateX(0); }
    .app-main { margin-left: 0 !important; }
    .app-content { padding: 16px; }
    .dashboard-grid { grid-template-columns: 1fr; }
}