/* Microsoft-style Header */
.ms-header {
    background: var(--fluent-white);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.ms-header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 48px;
    padding: 0 24px;
    max-width: 1600px;
    margin: 0 auto;
}

.ms-header-left {
    display: flex;
    align-items: center;
    gap: 32px;
}

.ms-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    gap: 8px;
    font-size: 16px;
    font-weight: 600;
    color: var(--fluent-neutral-dark);
}

.ms-logo:hover {
    color: var(--fluent-neutral-dark);
}

.ms-logo-icon {
    width: 24px;
    height: 24px;
    background: var(--fluent-primary);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 12px;
    font-weight: 700;
}

.ms-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.ms-nav-item {
    position: relative;
}

.ms-nav-link {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 14px 12px;
    font-size: 13px;
    font-weight: 400;
    color: var(--fluent-neutral-primary);
    text-decoration: none;
    transition: all 0.1s ease;
    border-bottom: 2px solid transparent;
}

.ms-nav-link:hover {
    color: var(--fluent-neutral-dark);
    background: var(--fluent-neutral-lighter);
}

.ms-nav-link.active {
    color: var(--fluent-primary);
    border-bottom-color: var(--fluent-primary);
}

.ms-nav-link i.fa-chevron-down {
    font-size: 10px;
    transition: transform 0.2s ease;
}

.ms-nav-item:hover .ms-nav-link i.fa-chevron-down {
    transform: rotate(180deg);
}

/* Mega Dropdown */
.ms-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--fluent-white);
    border-radius: 0 0 8px 8px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
    padding: 24px;
    min-width: 320px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s ease;
    z-index: 1001;
}

.ms-nav-item:hover .ms-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.ms-dropdown-title {
    font-size: 11px;
    font-weight: 600;
    color: var(--fluent-neutral-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--fluent-neutral-light);
}

.ms-dropdown-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.ms-dropdown-item {
    margin-bottom: 4px;
}

.ms-dropdown-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: 6px;
    text-decoration: none;
    color: var(--fluent-neutral-primary);
    transition: all 0.1s ease;
}

.ms-dropdown-link:hover {
    background: var(--fluent-neutral-lighter);
    color: var(--fluent-primary);
}

.ms-dropdown-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: var(--fluent-primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--fluent-primary);
    font-size: 16px;
    flex-shrink: 0;
}

.ms-dropdown-link:hover .ms-dropdown-icon {
    background: var(--fluent-primary);
    color: white;
}

.ms-dropdown-text h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--fluent-neutral-dark);
    margin: 0 0 2px 0;
}

.ms-dropdown-text p {
    font-size: 12px;
    color: var(--fluent-neutral-secondary);
    margin: 0;
}

.ms-dropdown-link:hover .ms-dropdown-text h4 {
    color: var(--fluent-primary);
}

/* Header Right */
.ms-header-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.ms-header-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 600;
    border-radius: 4px;
    text-decoration: none;
    transition: all 0.1s ease;
}

.ms-btn-text {
    color: var(--fluent-neutral-primary);
    background: transparent;
    border: none;
}

.ms-btn-text:hover {
    color: var(--fluent-primary);
    background: var(--fluent-neutral-lighter);
}

.ms-btn-primary {
    background: var(--fluent-primary);
    color: white;
    border: none;
}

.ms-btn-primary:hover {
    background: var(--fluent-primary-dark);
    color: white;
}

/* User Dropdown */
.ms-user-dropdown {
    position: relative;
}

.ms-user-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: transparent;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.1s ease;
}

.ms-user-btn:hover {
    background: var(--fluent-neutral-lighter);
}

.ms-user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--fluent-primary) 0%, var(--fluent-primary-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 13px;
    font-weight: 600;
}

.ms-user-avatar img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

.ms-user-name {
    font-size: 13px;
    font-weight: 400;
    color: var(--fluent-neutral-primary);
}

.ms-user-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--fluent-white);
    border-radius: 8px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
    min-width: 200px;
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s ease;
    z-index: 1001;
}

.ms-user-dropdown:hover .ms-user-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.ms-user-menu-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    font-size: 13px;
    color: var(--fluent-neutral-primary);
    text-decoration: none;
    transition: all 0.1s ease;
}

.ms-user-menu-item:hover {
    background: var(--fluent-neutral-lighter);
    color: var(--fluent-primary);
}

.ms-user-menu-item i {
    width: 16px;
    color: var(--fluent-neutral-secondary);
}

.ms-user-menu-item:hover i {
    color: var(--fluent-primary);
}

.ms-user-menu-divider {
    height: 1px;
    background: var(--fluent-neutral-light);
    margin: 8px 0;
}

.ms-user-menu-item.logout {
    color: var(--fluent-error);
}

.ms-user-menu-item.logout:hover {
    background: rgba(209, 52, 56, 0.1);
}

.ms-user-menu-item.logout i {
    color: var(--fluent-error);
}

/* Mobile Toggle */
.ms-mobile-toggle {
    display: none;
    background: transparent;
    border: none;
    padding: 8px;
    cursor: pointer;
    color: var(--fluent-neutral-primary);
    font-size: 20px;
}

/* Mobile Styles */
@media (max-width: 991px) {
    .ms-header-container {
        padding: 0 16px;
    }

    .ms-mobile-toggle {
        display: block;
    }

    .ms-nav-wrapper {
        position: fixed;
        top: 48px;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--fluent-white);
        padding: 24px;
        display: none;
        flex-direction: column;
        overflow-y: auto;
        z-index: 1000;
    }

    .ms-nav-wrapper.active {
        display: flex;
    }

    .ms-nav {
        flex-direction: column;
        gap: 0;
    }

    .ms-nav-link {
        padding: 16px 0;
        border-bottom: 1px solid var(--fluent-neutral-light);
    }

    .ms-dropdown {
        position: static;
        box-shadow: none;
        padding: 0 0 0 16px;
        opacity: 1;
        visibility: visible;
        transform: none;
        display: none;
    }

    .ms-nav-item.mobile-open .ms-dropdown {
        display: block;
    }

    .ms-header-right {
        margin-top: 24px;
        padding-top: 24px;
        border-top: 1px solid var(--fluent-neutral-light);
        flex-direction: column;
        align-items: stretch;
    }

    .ms-header-btn {
        justify-content: center;
        padding: 12px 16px;
    }
}