/* ===================================
   CSS Variables & Root Styles
   =================================== */
:root {
    --primary-color: #1a1f3a;
    --secondary-color: #2d3561;
    --accent-color: #00bcd4;
    --accent-light: #4dd0e1;
    --text-color: #1a1f3a;
    --text-light: #6c757d;
    --white: #ffffff;
    --light-gray: #f8f9fa;
    --border-color: #dee2e6;
    --success-color: #28a745;
    --error-color: #dc3545;
    --transition: all 0.3s ease;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
}

/* ===================================
   Global Reset & Base Styles
   =================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===================================
   Layout Components
   =================================== */
.site-wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.main-content {
    flex: 1;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===================================
   Header & Navigation
   =================================== */
.site-header {
    background: var(--primary-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-md);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
}

.logo-link {
    display: flex;
    text-decoration: none;
    transition: var(--transition);
}

.logo-link:hover {
    opacity: 0.9;
}

.logo-text {
    color: var(--white);
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    line-height: 1;
}

.logo-image {
    height: 60px;
    width: auto;
    object-fit: contain;
}

.logo-slogan {
    color: var(--accent-color);
    font-size: 0.65rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    opacity: 0.95;
}

.logo-accent {
    color: var(--accent-color);
}

.nav-menu {
    display: flex;
    align-items: center;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 4px;
    padding: 8px;
}

.hamburger {
    width: 25px;
    height: 3px;
    background: var(--white);
    transition: var(--transition);
}

.nav-list {
    display: flex;
    gap: 2rem;
    list-style: none;
    align-items: center;
}

.nav-item {
    position: relative;
}

.nav-link {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 0;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent-light);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-light);
    transition: var(--transition);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.btn-contact {
    background: var(--accent-color);
    color: var(--white);
    padding: 0.75rem 1.5rem;
    border-radius: 25px;
    font-weight: 600;
    transition: var(--transition);
    box-shadow: 0 2px 8px rgba(0, 188, 212, 0.3);
}

.btn-contact:hover {
    background: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 188, 212, 0.4);
}

/* ===================================
   Footer
   =================================== */
.site-footer {
    background: var(--primary-color);
    color: var(--white);
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--white);
    padding-left: 5px;
}

.footer-text {
    color: rgba(255, 255, 255, 0.8);
    margin: 0.25rem 0;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

/* ===================================
   Hero Section
   =================================== */
.hero-section {
    position: relative;
    background: linear-gradient(135deg, #1a1f3a 0%, #2d3561 100%);
    color: var(--white);
    padding: 8rem 2rem;
    text-align: center;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="40" height="40" patternUnits="userSpaceOnUse"><path d="M 40 0 L 0 0 0 40" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-description {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.95;
    line-height: 1.8;
}

/* ===================================
   Page Header
   =================================== */
.page-header {
    background: linear-gradient(135deg, #1a1f3a 0%, #2d3561 100%);
    color: var(--white);
    padding: 4rem 2rem;
    text-align: center;
}

.page-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.page-description {
    font-size: 1.1rem;
    opacity: 0.95;
    max-width: 800px;
    margin: 0 auto;
}

/* ===================================
   Statistics Section
   =================================== */
.stats-section {
    background: var(--white);
    padding: 4rem 2rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.stat-card {
    text-align: center;
    padding: 2rem;
    background: var(--light-gray);
    border-radius: 12px;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1.1rem;
    color: var(--text-light);
}

/* ===================================
   Section Common Styles
   =================================== */
section {
    padding: 4rem 2rem;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 700px;
    margin: 0 auto;
}

/* ===================================
   Services Section
   =================================== */
.services-overview {
    background: var(--light-gray);
}

.services-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.service-tab {
    padding: 1rem 2rem;
    background: var(--white);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

.service-tab:hover {
    border-color: var(--accent-color);
    transform: translateY(-2px);
}

.service-tab.active {
    background: var(--accent-color);
    color: var(--white);
    border-color: var(--accent-color);
}

.tab-content {
    background: var(--white);
    padding: 3rem;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.tab-panel h3 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.content-text p {
    margin-bottom: 1rem;
    line-height: 1.8;
}

.content-image,
.placeholder-image {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--light-gray);
    border-radius: 12px;
    min-height: 300px;
}

.activities-list,
.innovations-grid {
    display: grid;
    gap: 1.5rem;
}

.innovations-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.activity-item,
.innovation-card {
    padding: 1.5rem;
    background: var(--light-gray);
    border-radius: 12px;
    border-left: 4px solid var(--accent-color);
    transition: var(--transition);
}

.activity-item:hover,
.innovation-card:hover {
    border-left-width: 6px;
    transform: translateX(5px);
    box-shadow: var(--shadow-md);
}

.activity-item h4,
.innovation-card h4 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

/* ===================================
   Service Types & Activities
   =================================== */
.service-types,
.field-activities {
    background: var(--white);
}

.service-type-grid,
.activities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.service-type-card,
.activity-card {
    padding: 2rem;
    background: var(--light-gray);
    border-radius: 12px;
    transition: var(--transition);
}

.service-type-card:hover,
.activity-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.service-type-icon {
    margin-bottom: 1.5rem;
}

.activity-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.service-type-card h3,
.activity-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.feature-list {
    list-style: none;
    margin-top: 1rem;
}

.feature-list li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: bold;
}

/* ===================================
   Customer & Career Pages
   =================================== */
.customer-segments,
.roles-opportunities {
    background: var(--white);
}

.segments-grid,
.roles-grid {
    display: grid;
    gap: 2rem;
}

.segment-card,
.role-card {
    background: var(--light-gray);
    padding: 2rem;
    border-radius: 12px;
}

.segment-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.segment-icon {
    font-size: 2.5rem;
}

.segment-card h2,
.role-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.benefits-list {
    list-style: none;
    margin-top: 1rem;
}

.benefits-list li {
    padding: 0.75rem 0;
    padding-left: 2rem;
    position: relative;
}

.benefits-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: bold;
}

/* ===================================
   Why Partner & Principles
   =================================== */
.why-partner,
.business-principles,
.mission-principles {
    background: var(--light-gray);
}

.partner-benefits,
.principles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.benefit-item,
.principle-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.benefit-item:hover,
.principle-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.benefit-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.principle-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.principle-card h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

/* ===================================
   Culture, Team & Coverage
   =================================== */
.culture-benefits,
.company-overview,
.global-coverage {
    background: var(--white);
}

.content-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.content-text h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.content-text p {
    margin-bottom: 1rem;
    line-height: 1.8;
}

.content-stats,
.content-image.large {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.stat-highlight {
    background: var(--light-gray);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
}

.coverage-regions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.region-card {
    background: var(--light-gray);
    padding: 2rem;
    border-radius: 12px;
}

.region-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* ===================================
   Testimonial Section
   =================================== */
.testimonial-section {
    background: var(--primary-color);
    color: var(--white);
}

.testimonial {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.testimonial blockquote {
    font-size: 1.5rem;
    font-style: italic;
    line-height: 1.8;
    margin-bottom: 2rem;
}

.testimonial-author {
    margin-top: 2rem;
}

.author-name {
    font-weight: 600;
    font-size: 1.1rem;
}

.author-title {
    opacity: 0.8;
}

/* ===================================
   Contact Form
   =================================== */
.contact-section {
    background: var(--white);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 3rem;
}

.contact-form-container h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.form-description {
    color: var(--text-light);
    margin-bottom: 2rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 500;
    color: var(--text-color);
}

.form-input {
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
}

.form-input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.checkbox-label {
    display: flex;
    gap: 0.5rem;
    align-items: flex-start;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    margin-top: 0.25rem;
}

.contact-info {
    background: var(--light-gray);
    padding: 2rem;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.info-section h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.info-item {
    margin-bottom: 1rem;
}

.info-item h4 {
    color: var(--text-color);
    margin-bottom: 0.25rem;
}

.note {
    font-style: italic;
    color: var(--text-light);
    font-size: 0.9rem;
}

.global-locations {
    background: var(--light-gray);
}

.locations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.location-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
}

.location-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* ===================================
   Buttons
   =================================== */
.btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.btn-primary {
    background: var(--accent-color);
    color: var(--white);
    border-radius: 25px;
    box-shadow: 0 2px 8px rgba(0, 188, 212, 0.3);
}

.btn-primary:hover {
    background: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 188, 212, 0.4);
}

.btn-primary:disabled {
    background: var(--text-light);
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background: transparent;
    color: var(--accent-color);
    border: 2px solid var(--accent-color);
    border-radius: 25px;
}

.btn-secondary:hover {
    background: var(--accent-color);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 188, 212, 0.3);
}

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===================================
   Alerts
   =================================== */
.alert {
    padding: 1rem 1.5rem;
    border-radius: 6px;
    margin: 1rem 0;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* ===================================
   CTA Section
   =================================== */
.cta-section {
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--accent-light) 100%);
    color: var(--white);
    text-align: center;
    padding: 5rem 2rem;
}

.cta-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta-description {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

/* ===================================
   Innovations & Academy
   =================================== */
.innovations-section,
.technician-academy {
    background: var(--light-gray);
}

.innovations-list,
.academy-features {
    display: grid;
    gap: 2rem;
}

.innovation-item,
.feature-item {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

.innovation-content h3,
.feature-item strong {
    color: var(--primary-color);
    display: block;
    margin-bottom: 0.5rem;
}

.academy-content {
    max-width: 900px;
    margin: 0 auto;
}

.academy-content h2 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    text-align: center;
}

.academy-features {
    margin-top: 2rem;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* ===================================
   Join Steps & Commitments
   =================================== */
.how-to-join,
.service-delivery,
.sustainability {
    background: var(--white);
}

.join-steps,
.delivery-commitments,
.commitments-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.step-item,
.commitment-item,
.commitment-card {
    text-align: center;
    padding: 2rem;
    background: var(--light-gray);
    border-radius: 12px;
    transition: var(--transition);
}

.step-item:hover,
.commitment-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.step-number {
    width: 50px;
    height: 50px;
    background: var(--accent-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 1rem;
}

.step-item h3,
.commitment-item h4,
.commitment-card h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.delivery-content,
.sustainability-content {
    max-width: 1000px;
    margin: 0 auto;
}

.delivery-content h2,
.sustainability-content h2 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    text-align: center;
}

/* ===================================
   Leadership Team
   =================================== */
.leadership-team {
    background: var(--light-gray);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.team-member {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.team-member:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.member-avatar {
    margin-bottom: 1rem;
    display: flex;
    justify-content: center;
}

.team-member h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.member-title {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* ===================================
   Holistic Solutions
   =================================== */
.holistic-solutions {
    background: var(--light-gray);
}

.solution-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.solution-content h2 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.solution-content p {
    margin-bottom: 2rem;
    line-height: 1.8;
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 992px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .content-grid,
    .content-split,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .service-type-grid,
    .activities-grid,
    .segments-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-list {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--primary-color);
        flex-direction: column;
        padding: 2rem;
        gap: 1rem;
        transform: translateX(-100%);
        transition: var(--transition);
    }

    .nav-list.active {
        transform: translateX(0);
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .stats-grid,
    .partner-benefits,
    .principles-grid,
    .coverage-regions,
    .locations-grid,
    .team-grid {
        grid-template-columns: 1fr;
    }

    .services-tabs {
        flex-direction: column;
    }

    .tab-content {
        padding: 1.5rem;
    }

    .cta-buttons {
        flex-direction: column;
    }
}

@media (max-width: 576px) {
    section {
        padding: 2rem 1rem;
    }

    .hero-section {
        padding: 4rem 1rem;
    }

    .page-header {
        padding: 2rem 1rem;
    }

    .hero-title,
    .page-title {
        font-size: 1.75rem;
    }

    .btn-large {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
    }
}

/* ===================================
   Utilities
   =================================== */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }