:root {
    --bg-app: #faf9f6;
    --bg-surface: #ffffff;
    --bg-sidebar: #f6f3ee;
    --bg-sidebar-hover: #ece7dd;
    --border: #e7e2d8;
    --border-strong: #d9d2c4;
    --text: #262420;
    --text-muted: #78726a;
    --accent: #2f6feb;
    --accent-hover: #2558bf;
    --accent-tint: #e4edfb;
    --success: #3f7a57;
    --success-tint: #e5efe8;
    --danger: #b3432d;
    --danger-tint: #f6e6e1;
    --warning: #a9752b;
    --warning-tint: #f3ead9;
    --info: #4a6fa5;
    --info-tint: #e6ecf4;
    --radius: 10px;
    --radius-lg: 14px;
    --sidebar-w: 264px;
    --sidebar-w-collapsed: 72px;
}

* { box-sizing: border-box; }

html, body {
    height: 100%;
}

body {
    background: var(--bg-app);
    color: var(--text);
    font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 14.5px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

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

/* ---------- App shell ------------------------------------- */

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

.sidebar {
    width: var(--sidebar-w);
    flex-shrink: 0;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    transition: width 0.18s ease;
    overflow-x: hidden;
}

.app-shell.sidebar-collapsed .sidebar {
    width: var(--sidebar-w-collapsed);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 1.1rem 1.1rem 0.9rem;
    font-weight: 600;
    font-size: 1.02rem;
    white-space: nowrap;
    color: var(--text);
}

.sidebar-brand .mark {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    background: var(--accent);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
    flex-shrink: 0;
}

.sidebar-toggle {
    margin-left: auto;
    border: none;
    background: transparent;
    color: var(--text-muted);
    width: 28px;
    height: 28px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.sidebar-toggle:hover { background: var(--bg-sidebar-hover); color: var(--text); }
.app-shell.sidebar-collapsed .sidebar-toggle { display: none; }

.sidebar-expand-toggle {
    display: none;
    border: none;
    background: transparent;
    color: var(--text-muted);
    width: 32px;
    height: 32px;
    border-radius: 6px;
    align-items: center;
    justify-content: center;
    margin: 0.4rem auto 0.2rem;
}
.app-shell.sidebar-collapsed .sidebar-expand-toggle { display: flex; }
.sidebar-expand-toggle:hover { background: var(--bg-sidebar-hover); color: var(--text); }

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 0.4rem 0.7rem 1rem;
}

.sidebar-group {
    margin-top: 1.15rem;
}
.sidebar-group:first-child { margin-top: 0.2rem; }

.sidebar-group-label {
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    color: var(--text-muted);
    padding: 0 0.6rem 0.35rem;
    white-space: nowrap;
}
.app-shell.sidebar-collapsed .sidebar-group-label { display: none; }

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.5rem 0.6rem;
    border-radius: var(--radius);
    color: var(--text);
    font-size: 0.88rem;
    white-space: nowrap;
    margin-bottom: 0.1rem;
}
.sidebar-link:hover { background: var(--bg-sidebar-hover); color: var(--text); }
.sidebar-link.active { background: var(--accent-tint); color: var(--accent-hover); font-weight: 600; }

.sidebar-link .icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}
.sidebar-link .icon svg { width: 100%; height: 100%; }

.app-shell.sidebar-collapsed .sidebar-link span.label { display: none; }
.app-shell.sidebar-collapsed .sidebar-link { justify-content: center; }

.sidebar-footer {
    padding: 0.8rem;
    border-top: 1px solid var(--border);
}

/* ---------- Main column ------------------------------------ */

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

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.9rem 1.5rem;
    border-bottom: 1px solid var(--border);
    background: var(--bg-app);
    position: sticky;
    top: 0;
    z-index: 5;
}

.topbar-title {
    font-size: 1rem;
    font-weight: 600;
}

.topbar-user {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.content-area {
    padding: 1.5rem;
    max-width: 1180px;
    width: 100%;
}

/* With the sidebar collapsed the page uses the whole width instead of leaving a gap on the right. */
.app-shell.sidebar-collapsed .content-area {
    max-width: none;
}

/* ---------- Bootstrap component reskin ---------------------- */

.card {
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: none;
    background: var(--bg-surface);
}
.card-header {
    background: transparent;
    border-bottom: 1px solid var(--border);
    font-weight: 600;
    font-size: 0.88rem;
    padding: 0.85rem 1.1rem;
}
.card-body { padding: 1.1rem; }

.btn {
    border-radius: 8px;
    font-size: 0.87rem;
    font-weight: 500;
    padding: 0.45rem 0.9rem;
    border-width: 1px;
}

/* Bootstrap 5.3 resolves .btn-primary's colors through its own --bs-btn-*
   custom properties, which can win over a plain `background` override in
   some states. Setting those variables directly is the reliable fix. */
.btn-primary {
    --bs-btn-color: #fff;
    --bs-btn-bg: var(--accent);
    --bs-btn-border-color: var(--accent);
    --bs-btn-hover-color: #fff;
    --bs-btn-hover-bg: var(--accent-hover);
    --bs-btn-hover-border-color: var(--accent-hover);
    --bs-btn-active-color: #fff;
    --bs-btn-active-bg: var(--accent-hover);
    --bs-btn-active-border-color: var(--accent-hover);
    --bs-btn-disabled-bg: var(--accent);
    --bs-btn-disabled-border-color: var(--accent);
    --bs-btn-focus-shadow-rgb: 47, 111, 235;
    color: #fff;
    background-color: var(--accent);
    border-color: var(--accent);
}
.btn-primary:hover, .btn-primary:focus, .btn-primary:active {
    color: #fff !important;
    background-color: var(--accent-hover) !important;
    border-color: var(--accent-hover) !important;
}

.btn-outline-primary {
    --bs-btn-color: var(--accent);
    --bs-btn-border-color: var(--accent);
    --bs-btn-hover-bg: var(--accent);
    --bs-btn-hover-border-color: var(--accent);
    --bs-btn-active-bg: var(--accent);
    --bs-btn-active-border-color: var(--accent);
    color: var(--accent);
    border-color: var(--accent);
}
.btn-outline-primary:hover, .btn-outline-primary:active {
    color: #fff !important;
    background-color: var(--accent) !important;
    border-color: var(--accent) !important;
}
.btn-outline-secondary, .btn-link { color: var(--text); }
.btn-outline-danger { color: var(--danger); border-color: var(--danger); }
.btn-outline-danger:hover { background: var(--danger); border-color: var(--danger); }
.btn-outline-success { color: var(--success); border-color: var(--success); }
.btn-outline-success:hover { background: var(--success); border-color: var(--success); }
.btn-outline-dark { color: var(--text); border-color: var(--border-strong); }
.btn-outline-light { color: var(--text-muted); border-color: transparent; }

.form-control, .form-select {
    border-radius: 8px;
    border-color: var(--border-strong);
    font-size: 0.88rem;
}
.form-control:focus, .form-select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-tint);
}
.form-label { font-size: 0.83rem; font-weight: 500; color: var(--text); margin-bottom: 0.3rem; }
.form-text { color: var(--text-muted); font-size: 0.78rem; }

.table { font-size: 0.86rem; color: var(--text); }
.table thead th {
    background: transparent;
    border-bottom: 1px solid var(--border);
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.74rem;
    letter-spacing: 0.01em;
    text-transform: none;
}
.table td, .table th { border-color: var(--border); vertical-align: middle; }
.table-hover tbody tr:hover { background: var(--bg-sidebar); }

.badge { font-weight: 500; border-radius: 6px; padding: 0.32em 0.55em; font-size: 0.74rem; }
.text-bg-secondary { background: var(--bg-sidebar-hover) !important; color: var(--text) !important; }
.text-bg-success { background: var(--success-tint) !important; color: var(--success) !important; }
.text-bg-danger { background: var(--danger-tint) !important; color: var(--danger) !important; }
.text-bg-warning { background: var(--warning-tint) !important; color: var(--warning) !important; }
.text-bg-info { background: var(--info-tint) !important; color: var(--info) !important; }

.alert { border-radius: var(--radius); border: 1px solid transparent; font-size: 0.87rem; }
.alert-success { background: var(--success-tint); color: var(--success); border-color: var(--success-tint); }
.alert-danger { background: var(--danger-tint); color: var(--danger); border-color: var(--danger-tint); }

dt { color: var(--text-muted); font-size: 0.8rem; font-weight: 500; }
dd { font-size: 0.88rem; }

.page-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 1.25rem;
}
.page-title { font-size: 1.3rem; font-weight: 600; margin: 0; }
.page-subtitle { color: var(--text-muted); font-size: 0.85rem; margin-top: 0.15rem; }

.empty-state {
    text-align: center;
    color: var(--text-muted);
    padding: 2.5rem 1rem;
    font-size: 0.88rem;
}

/* ---------- Responsive: sidebar becomes an overlay ---------- */

@media (max-width: 860px) {
    .sidebar {
        position: fixed;
        inset: 0 auto 0 0;
        z-index: 20;
        transform: translateX(-100%);
        box-shadow: 0 0 0 100vw rgba(0,0,0,0.15);
    }
    .app-shell.sidebar-collapsed .sidebar { width: var(--sidebar-w); transform: translateX(-100%); }
    .app-shell.sidebar-open .sidebar { transform: translateX(0); }
    .app-shell.sidebar-open .sidebar .sidebar-group-label,
    .app-shell.sidebar-open .sidebar-link span.label { display: block; }
    .sidebar-expand-toggle { display: flex !important; }
}