:root {
    /* Base Colors - Light Professional Palette */
    --gold: #d97706;
    --gold-hover: #b45309;
    --navy-bg: #f8fafc;
    --navy-card: #ffffff;
    --navy-input: #f1f5f9;
    --white: #ffffff;

    /* Typography & Contrast */
    --text-main: #0f172a !important;
    --text-muted: #475569 !important;
    --text-dim: #94a3b8 !important;

    /* Borders & Shadows */
    --border-color: #e2e8f0;
    --border-color-focus: rgba(217, 119, 6, 0.4);
    --shadow-main: 0 4px 20px -2px rgba(15, 23, 42, 0.06);
    --shadow-card: 0 10px 30px -5px rgba(15, 23, 42, 0.08);

    /* Dimensions & Transitions */
    --nav-height: 84px;
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.manage-admin {
    padding-top: 104px;
}

html {
    scroll-behavior: smooth !important;
}

/* Base Reset cho Component Header */
.site-header * {
    box-sizing: border-box;
}

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1030;
    height: var(--nav-height);
    background: var(--navy-card);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-main);
    display: flex;
    align-items: center;
}

.site-header__container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Logo - Scaled Up */
.site-header__logo {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-weight: 800;
    font-size: 1.75rem;
    color: var(--text-main);
    text-decoration: none;
    letter-spacing: -0.02em;
}

.site-header__logo:hover {
    color: rgb(15, 23, 42);
}

.site-header__logo-icon {
    font-size: 2rem;
    color: var(--gold);
}

.site-header__logo-accent {
    color: var(--gold);
}

/* Navigation Links - Scaled Up */
.site-header__menu {
    display: flex;
    align-items: center;
    gap: 36px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.site-header__link {
    color: var(--text-muted);
    font-weight: 600;
    font-size: 1.05rem;
    text-decoration: none;
    position: relative;
    padding: 8px 0;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: color var(--transition);
}

.site-header__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--gold);
    transition: width var(--transition);
    border-radius: 2px;
}

/* Ẩn mũi tên caret của Bootstrap trên dropdown-toggle trong header */
.site-header__link.dropdown-toggle::after {
    display: none;
}

.site-header__link:hover,
.site-header__link.active {
    color: var(--gold);
}

.site-header__link:hover::after,
.site-header__link.active::after {
    width: 100%;
}

/* Actions & Buttons - Scaled Up */
.site-header__actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.site-header__btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 10px 24px;
    border-radius: 50px;
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition);
}

.site-header__btn--primary {
    background: var(--gold);
    color: var(--white);
    border: none;
}

.site-header__btn--primary:hover {
    background: var(--gold-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(217, 119, 6, 0.25);
}

.site-header__btn--outline {
    background: transparent;
    color: var(--text-main);
    border: 1.5px solid var(--border-color);
}

.site-header__btn--outline:hover {
    background: var(--navy-bg);
    border-color: var(--gold);
    color: var(--gold);
}

.site-header__btn--user {
    background: var(--navy-bg);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 8px 20px;
    font-size: 0.95rem;
}

.site-header__username {
    font-weight: 600;
}

.site-header__badge {
    background: #dc2626;
    color: var(--white);
    font-size: 0.7rem;
    padding: 2px 8px;
    border-radius: 12px;
}

/* Dropdowns Desktop */
.site-header__dropdown-menu {
    border-radius: 12px;
    margin-top: 12px !important;
    padding: 10px 0;
    min-width: 240px;
    background: var(--white);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-card);
}

.site-header__dropdown-menu .dropdown-item {
    padding: 10px 20px;
    font-size: 0.9rem;
    color: var(--text-muted);
    transition: all var(--transition);
}

.site-header__dropdown-menu .dropdown-item:hover {
    background: var(--navy-bg);
    color: var(--gold);
    transform: translateX(4px);
}

@media (min-width: 992px) {
    .dropdown-submenu {
        position: relative;
    }
    .dropdown-submenu > .dropdown-menu {
        top: 0;
        left: 100%;
        margin-top: -6px;
        display: none;
    }
    .dropdown-submenu:hover > .dropdown-menu {
        display: block;
    }
}

/* Mobile Toggle Button */
.site-header__mobile-toggle {
    display: none;
    background: transparent;
    border: none;
    color: var(--text-main);
    font-size: 1.75rem;
    cursor: pointer;
    padding: 6px;
}

/* Off-canvas Side Drawer */
.mobile-drawer-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(4px);
    z-index: 1040;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition), visibility var(--transition);
}

.mobile-drawer-backdrop.active {
    opacity: 1;
    visibility: visible;
}

.mobile-drawer {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 320px;
    max-width: 85vw;
    background: var(--white);
    z-index: 1050;
    display: flex;
    flex-direction: column;
    transform: translateX(100%);
    transition: transform var(--transition);
    box-shadow: var(--shadow-card);
}

.mobile-drawer.open {
    transform: translateX(0);
}

.mobile-drawer__header {
    padding: 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
}

.mobile-drawer__close {
    background: transparent;
    border: none;
    color: var(--text-main);
    font-size: 1.5rem;
    cursor: pointer;
}

.mobile-drawer__body {
    padding: 24px;
    overflow-y: auto;
    flex: 1;
}

.mobile-drawer__user {
    display: flex;
    align-items: center;
    gap: 14px;
    padding-bottom: 20px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.mobile-drawer__user-avatar {
    font-size: 2.5rem;
    color: var(--gold);
}

.mobile-drawer__user-name {
    display: block;
    color: var(--text-main);
    font-weight: 600;
    font-size: 1.05rem;
}

.mobile-drawer__user-role {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.mobile-drawer__menu {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.mobile-drawer__link {
    color: var(--text-main);
    text-decoration: none;
    font-size: 1rem;
    font-weight: 500;
    display: block;
    padding: 4px 0;
}

.mobile-drawer__footer {
    padding: 24px;
    border-top: 1px solid var(--border-color);
}

/* Accordion Mobile */
.mobile-drawer__accordion-toggle {
    width: 100%;
    background: none;
    border: none;
    color: var(--text-main);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 4px 0;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
}

.mobile-drawer__accordion-menu {
    display: none;
    list-style: none;
    padding-left: 16px;
    margin-top: 10px;
}

.mobile-drawer__accordion-menu a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    display: block;
    padding: 8px 0;
}

.mobile-drawer__accordion.active .mobile-drawer__accordion-menu {
    display: block;
}

.mobile-drawer__accordion.active .arrow {
    transform: rotate(180deg);
}

/* ============================================
   RESPONSIVE OPTIMIZATION
   ============================================ */

/* Tablet & Small Laptops (992px – 1200px) – Thu nhỏ header, ẩn icon menu */
@media (max-width: 1200px) and (min-width: 992px) {
    .site-header__container {
        padding: 0 20px;
    }

    .site-header__menu {
        gap: 20px;
    }

    .site-header__link {
        font-size: 0.9rem;
        gap: 4px;
    }

    /* Ẩn icon trên menu để tiết kiệm không gian */
    .site-header__link-icon {
        display: none;
    }

    .site-header__logo {
        font-size: 1.5rem;
    }

    .site-header__logo-icon {
        font-size: 1.7rem;
    }

    .site-header__btn {
        padding: 8px 16px;
        font-size: 0.85rem;
    }

    .site-header__btn--user {
        padding: 6px 14px;
        font-size: 0.85rem;
    }
}

/* Mobile & Tablet nhỏ (dưới 992px) – Chuyển sang off-canvas menu */
@media (max-width: 991px) {
    .site-header__nav {
        display: none;
    }
    .site-header__mobile-toggle {
        display: block;
    }

    .site-header__container {
        padding: 0 16px;
    }

    .site-header__logo {
        font-size: 1.3rem;
    }
    .site-header__logo-icon {
        font-size: 1.5rem;
    }
    .site-header__btn--user {
        padding: 6px 12px;
        font-size: 0.8rem;
    }
    .site-header__username {
        display: none; /* Ẩn tên user trên mobile để tiết kiệm chỗ */
    }
}