:root {
    --primary: #0048AE;
    --primary-dark: #003388;
    --primary-light: #1a5fc4;
    --sidebar-width: 260px;
    --sidebar-collapsed-width: 72px;
    --topbar-height: 64px;
    --transition: all 0.25s ease;

    --bs-primary: #0048AE;
    --bs-primary-rgb: 0, 72, 174;
    --bs-tertiary-bg: #F5F7FB;
    --bs-tertiary-bg-rgb: 245, 247, 251;
    
    --bs-primary-bg-subtle: #3B7FD4;
}

*, *::before, *::after {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    font-size: 16px;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background-color: #f0f2f8;
    color: #2d3748;
}

@media (min-width: 768px) {
    html { font-size: 15px; }
}

/* ─── SIDEBAR ─────────────────────────────────────────────── */

.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: linear-gradient(175deg, #003388 0%, #0048AE 60%, #1a5fc4 100%);
    display: flex;
    flex-direction: column;
    z-index: 1000;
    transition: var(--transition);
    overflow: hidden;
    box-shadow: 4px 0 20px rgba(0, 72, 174, 0.18);
}

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

/* Brand */
.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px 18px;
    min-height: var(--topbar-height);
    flex-shrink: 0;
}

.sidebar-brand-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 10px;
    font-size: 18px;
    color: #fff;
    flex-shrink: 0;
    backdrop-filter: blur(4px);
}

.sidebar-brand-text {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    white-space: nowrap;
    transition: var(--transition);
}

.sidebar-brand-text span {
    color: #fff;
    font-size: 15px;
    letter-spacing: 0.3px;
}

.sidebar-brand-text small {
    color: rgba(255, 255, 255, 0.6);
    font-size: 11px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.sidebar.collapsed .sidebar-brand-text {
    opacity: 0;
    width: 0;
}

/* Divider */
.sidebar-divider {
    border-color: rgba(255, 255, 255, 0.12);
    margin: 0 18px 8px;
}

/* Nav */
.sidebar-nav {
    flex: 1;
    padding: 0 10px;
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,0.15) transparent;
}

.sidebar-nav::-webkit-scrollbar { width: 4px; }
.sidebar-nav::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); border-radius: 4px; }

.sidebar-nav-label {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 1.2px;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.45);
    padding: 6px 10px 4px;
    white-space: nowrap;
    overflow: hidden;
    transition: var(--transition);
}

.sidebar.collapsed .sidebar-nav-label {
    opacity: 0;
}

.sidebar-nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: 10px;
    color: rgba(255, 255, 255, 0.75);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 2px;
    transition: var(--transition);
    white-space: nowrap;
    position: relative;
}

.sidebar-nav-item i {
    font-size: 18px;
    flex-shrink: 0;
    width: 22px;
    text-align: center;
}

.sidebar-nav-item span {
    overflow: hidden;
    transition: var(--transition);
}

.sidebar.collapsed .sidebar-nav-item span {
    opacity: 0;
    width: 0;
}

.sidebar-nav-item:hover {
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
}

.sidebar-nav-item.active {
    background: rgba(255, 255, 255, 0.18);
    color: #fff;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.sidebar-nav-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 60%;
    background: #fff;
    border-radius: 0 3px 3px 0;
}

/* Collapsed tooltip */
.sidebar.collapsed .sidebar-nav-item {
    justify-content: center;
}

/* Footer / user */
.sidebar-footer {
    padding: 12px 10px;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    flex-shrink: 0;
}

.sidebar-user {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.08);
    overflow: hidden;
    transition: var(--transition);
}

.sidebar-user:hover {
    background: rgba(255, 255, 255, 0.14);
}

.sidebar-user-avatar {
    width: 34px;
    height: 34px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    color: #fff;
    flex-shrink: 0;
}

.sidebar-user-info {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: var(--transition);
    white-space: nowrap;
}

.sidebar.collapsed .sidebar-user-info,
.sidebar.collapsed .sidebar-user-logout {
    opacity: 0;
    width: 0;
}

.sidebar-user-name {
    font-size: 13px;
    font-weight: 600;
    color: #fff;
}

.sidebar-user-role {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.55);
}

.sidebar-user-logout {
    color: rgba(255, 255, 255, 0.55);
    font-size: 16px;
    transition: var(--transition);
    text-decoration: none;
    display: flex;
    align-items: center;
}

.sidebar-user-logout:hover {
    color: #fff;
}

/* ─── MAIN CONTENT ────────────────────────────────────────── */

.main-content {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
}

.main-content.expanded {
    margin-left: var(--sidebar-collapsed-width);
}

/* Topbar */
.topbar {
    height: var(--topbar-height);
    background: #fff;
    border-bottom: 1px solid #e8edf5;
    display: flex;
    align-items: center;
    padding: 0 24px;
    gap: 16px;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}

.topbar-toggle {
    background: none;
    border: none;
    padding: 6px 8px;
    border-radius: 8px;
    font-size: 20px;
    color: #6b7a99;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
}

.topbar-toggle:hover {
    background: #f0f2f8;
    color: var(--primary);
}

.topbar-breadcrumb .breadcrumb {
    font-size: 13px;
}

.topbar-breadcrumb .breadcrumb-item + .breadcrumb-item::before {
    color: #b0bbc8;
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.topbar-action-btn {
    position: relative;
    background: none;
    border: none;
    padding: 8px;
    border-radius: 10px;
    font-size: 18px;
    color: #6b7a99;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
}

.topbar-action-btn:hover {
    background: #f0f2f8;
    color: var(--primary);
}

.topbar-badge {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 16px;
    height: 16px;
    background: #e53e3e;
    color: #fff;
    font-size: 9px;
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.topbar-user-avatar {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary), #1a5fc4);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    color: #fff;
    cursor: pointer;
    transition: var(--transition);
}

.topbar-user-avatar:hover {
    box-shadow: 0 0 0 3px rgba(0, 72, 174, 0.2);
}

/* Page content */
.page-content {
    flex: 1;
    padding: 28px 32px;
}

/* ─── MOBILE ──────────────────────────────────────────────── */

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.collapsed {
        width: var(--sidebar-width);
        transform: translateX(0);
    }

    .sidebar.collapsed .sidebar-brand-text,
    .sidebar.collapsed .sidebar-nav-item span,
    .sidebar.collapsed .sidebar-nav-label,
    .sidebar.collapsed .sidebar-user-info,
    .sidebar.collapsed .sidebar-user-logout {
        opacity: 1;
        width: auto;
    }

    .sidebar.collapsed .sidebar-nav-item {
        justify-content: flex-start;
    }

    .main-content {
        margin-left: 0 !important;
    }
}

/* ─── UTILITIES ───────────────────────────────────────────── */

.btn:focus, .btn:active:focus, .form-control:focus, .form-check-input:focus {
    box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem rgba(0, 72, 174, 0.35);
}

.form-floating > .form-control::placeholder {
    color: var(--bs-secondary-color);
    text-align: end;
}

.form-floating > .form-control:focus::placeholder {
    text-align: start;
}


.validation-summary-valid {
    display: none !important;
}

table {
    border-collapse: separate;
    border: 2px solid #e8edf5;
    border-radius: 10px;
}

td:first-child, th:first-child {
    border-left: none;
}

th:first-of-type {
    border-top-left-radius: 10px;
}
th:last-of-type {
    border-top-right-radius: 10px;
}
tr:last-of-type td:first-of-type {
    border-bottom-left-radius: 10px;
}
tr:last-of-type td:last-of-type {
    border-bottom-right-radius: 10px;
}