/* =====================================================================
   Thanh điều hướng chung của site (_Layout.cshtml)
   Một hàng gọn trên máy tính (không bao giờ xuống dòng), menu dạng danh sách trên điện thoại
   ===================================================================== */
:root { --sn-h: 60px; --sn-primary: #4f46e5; --sn-text: #111827; --sn-muted: #6b7280; --sn-line: #e5e7eb; }

.sn {
    position: sticky; top: 0; z-index: 1030;
    background: rgba(255, 255, 255, 0.92); backdrop-filter: saturate(1.4) blur(10px); -webkit-backdrop-filter: saturate(1.4) blur(10px);
    border-bottom: 1px solid var(--sn-line);
}
.sn-inner { max-width: 1240px; margin: 0 auto; height: var(--sn-h); padding: 0 20px; display: flex; align-items: center; gap: 8px; }

.sn-brand { display: inline-flex; align-items: center; gap: 8px; margin-right: 12px; color: var(--sn-text); text-decoration: none; font-weight: 800; font-size: 1.12rem; letter-spacing: -0.02em; white-space: nowrap; }
.sn-brand:hover { color: var(--sn-primary); }
.sn-logo { display: inline-flex; align-items: center; justify-content: center; width: 34px; height: 34px; border-radius: 10px; background: #eef2ff; font-size: 1.1rem; }

/* Liên kết (máy tính) */
.sn-links { display: flex; align-items: center; gap: 2px; margin: 0; padding: 0; list-style: none; }
.sn-link {
    display: inline-flex; align-items: center; height: 38px; padding: 0 12px; border-radius: 10px;
    color: #4b5563; font-weight: 600; font-size: 0.92rem; text-decoration: none; white-space: nowrap; transition: background 0.15s, color 0.15s;
}
.sn-link:hover { background: #f3f4f6; color: var(--sn-text); }
.sn-link.active { background: #eef2ff; color: var(--sn-primary); }

.sn-spacer { flex: 1 1 auto; }

.sn-admin {
    display: inline-flex; align-items: center; gap: 6px; height: 36px; padding: 0 12px; border-radius: 10px;
    border: 1px solid #fcd34d; background: #fffbeb; color: #b45309; font-weight: 700; font-size: 0.86rem; text-decoration: none; white-space: nowrap;
}
.sn-admin:hover { background: #fef3c7; color: #92400e; }

/* Nút tài khoản */
.sn-user {
    display: inline-flex; align-items: center; gap: 8px; height: 40px; padding: 0 10px 0 4px; border-radius: 999px;
    border: 1px solid var(--sn-line); background: #fff; color: var(--sn-text); font-weight: 600; font-size: 0.9rem; cursor: pointer;
}
.sn-user:hover { border-color: #c7d2fe; }
.sn-user::after { content: ''; width: 6px; height: 6px; border-right: 2px solid #9ca3af; border-bottom: 2px solid #9ca3af; transform: rotate(45deg) translateY(-2px); margin-left: 2px; }
.sn-avatar { display: inline-flex; align-items: center; justify-content: center; width: 32px; height: 32px; border-radius: 50%; background: var(--sn-primary); color: #fff; font-weight: 800; font-size: 0.9rem; flex-shrink: 0; }
.sn-user-name { max-width: 140px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.sn-menu { min-width: 240px; padding: 6px; border-radius: 14px; border: 1px solid var(--sn-line); box-shadow: 0 18px 40px rgba(17, 24, 39, 0.14); }
.sn-menu-head { padding: 10px 12px 8px; }
.sn-menu-head b { display: block; font-size: 0.95rem; color: var(--sn-text); overflow: hidden; text-overflow: ellipsis; }
.sn-role { display: inline-block; margin-top: 4px; padding: 2px 8px; border-radius: 6px; font-size: 0.68rem; font-weight: 800; letter-spacing: 0.04em; text-transform: uppercase; }
.sn-role--admin { background: #fef2f2; color: #dc2626; }
.sn-role--user { background: #f3f4f6; color: #4b5563; }
.sn-menu .dropdown-item { display: flex; align-items: center; gap: 10px; padding: 9px 12px; border-radius: 10px; font-weight: 600; font-size: 0.9rem; color: #374151; }
.sn-menu .dropdown-item:hover { background: #f3f4f6; }
.sn-menu .dropdown-item.danger { color: #dc2626; }
.sn-menu .dropdown-item.danger:hover { background: #fef2f2; }
.sn-menu .dropdown-divider { margin: 6px 4px; }

/* Nút ☰ (điện thoại) */
.sn-burger { display: none; width: 42px; height: 42px; border-radius: 12px; border: 1px solid var(--sn-line); background: #fff; flex-direction: column; align-items: center; justify-content: center; gap: 4px; cursor: pointer; }
.sn-burger span { display: block; width: 18px; height: 2px; border-radius: 2px; background: #374151; transition: transform 0.2s, opacity 0.2s; }
.sn-burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.sn-burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.sn-burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* Menu thả xuống trên điện thoại */
.sn-mobile { border-top: 1px solid var(--sn-line); background: #fff; }
.sn-mobile-inner { padding: 8px 12px 14px; display: flex; flex-direction: column; gap: 2px; }
.sn-mobile a, .sn-mobile button.sn-mrow {
    display: flex; align-items: center; gap: 12px; width: 100%; min-height: 48px; padding: 0 12px; border-radius: 12px; border: 0; background: none;
    color: #374151; font-weight: 600; font-size: 1rem; text-decoration: none; text-align: left;
}
.sn-mobile a:hover, .sn-mobile button.sn-mrow:hover { background: #f3f4f6; }
.sn-mobile a.active { background: #eef2ff; color: var(--sn-primary); }
.sn-mobile .sn-ic { width: 24px; text-align: center; font-size: 1.1rem; }
.sn-mobile .sn-mrow--admin { color: #b45309; }
.sn-mobile .sn-mrow--danger, .sn-mobile button.sn-mrow--danger { color: #dc2626; }
.sn-mobile-sep { height: 1px; background: var(--sn-line); margin: 6px 4px; }
.sn-mobile-user { display: flex; align-items: center; gap: 10px; padding: 8px 12px; color: var(--sn-muted); font-size: 0.9rem; }
.sn-mobile-user b { color: var(--sn-text); }

@media (min-width: 992px) {
    .sn-mobile { display: none !important; }
}
@media (max-width: 1199.98px) {
    .sn-user-name { display: none; }
    .sn-user { padding-right: 8px; }
}
@media (max-width: 991.98px) {
    .sn-inner { padding: 0 12px; }
    .sn-links, .sn-admin { display: none; }
    .sn-burger { display: inline-flex; }
}