:root {
    --color-primary: #15649B;
    --color-primary-light: #1B7CB8;
    --color-bg-light: #FAFAFA;
    --color-bg-light-secondary: #FFFFFF;
    --color-text-light: #1F2937;
    --color-text-light-secondary: #6B7280;
    --color-border-light: #E5E7EB;
    
    --color-bg-dark: #0F172A;
    --color-bg-dark-secondary: #1E293B;
    --color-text-dark: #F1F5F9;
    --color-text-dark-secondary: #CBD5E1;
    --color-border-dark: #334155;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Verdana', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    background-color: var(--color-bg-light);
    color: var(--color-text-light);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

body.dark-mode {
    background-color: var(--color-bg-dark);
    color: var(--color-text-dark);
}

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

/* Header */
.header {
    background: var(--color-bg-light-secondary);
    border-bottom: 1px solid var(--color-border-light);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: all 0.3s ease;
}

body.dark-mode .header {
    background: var(--color-bg-dark-secondary);
    border-bottom: 1px solid var(--color-border-dark);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo h1 {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-primary);
}

.tagline {
    font-size: 12px;
    color: var(--color-text-light-secondary);
    font-weight: 500;
    letter-spacing: 1px;
}

body.dark-mode .tagline {
    color: var(--color-text-dark-secondary);
}

.nav {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-link {
    color: var(--color-text-light);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

body.dark-mode .nav-link {
    color: var(--color-text-dark);
}

.nav-link:hover {
    color: var(--color-primary);
}

.theme-toggle {
    background: none;
    border: none;
    font-size: 20px;
    cursor: pointer;
    padding: 5px;
    transition: transform 0.3s ease;
}

.theme-toggle:hover {
    transform: scale(1.2);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: white;
    padding: 100px 0;
    position: relative;
}

.hero-content {
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
}

.hero-image {
    position: absolute;
    bottom: -170px;
    left: -300px;
    max-width: 700px;
    height: auto;
    z-index: 1;
}

.hero-text {
    position: relative;
    z-index: 2;
}

.hero-content h2 {
    font-size: 48px;
    margin-bottom: 15px;
    font-weight: 700;
}

.hero-content p {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.95;
}

@media (max-width: 768px) {
    .hero-image {
        display: none;
    }
}

.cta-button {
    display: inline-block;
    background: white;
    color: var(--color-primary);
    padding: 14px 40px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    border: 1px solid rgba(0, 0, 0, 0.2);
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 16px;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.cta-button:active {
    transform: translateY(0);
}

.blue {
    background-color: var(--color-primary);
    color: var(--color-text-dark);
}

/* About Section */
.about {
    padding: 80px 0;
    background: var(--color-bg-light-secondary);
}

body.dark-mode .about {
    background: var(--color-bg-dark-secondary);
}

.about h2 {
    font-size: 36px;
    margin-bottom: 30px;
    color: var(--color-primary);
}

.intro-text {
    font-size: 16px;
    margin-bottom: 50px;
    color: var(--color-text-light-secondary);
    line-height: 1.8;
}

body.dark-mode .intro-text {
    color: var(--color-text-dark-secondary);
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.stat-item {
    padding: 30px;
    border: 1px solid var(--color-border-light);
    border-radius: 8px;
    text-align: center;
    transition: all 0.3s ease;
}

body.dark-mode .stat-item {
    border-color: var(--color-border-dark);
}

.stat-item:hover {
    border-color: var(--color-primary);
    box-shadow: 0 5px 15px rgba(21, 100, 155, 0.1);
}

body.dark-mode .stat-item:hover {
    box-shadow: 0 5px 15px rgba(21, 100, 155, 0.2);
}

.stat-item h3 {
    color: var(--color-primary);
    font-size: 20px;
    margin-bottom: 10px;
}

.stat-item p {
    color: var(--color-text-light-secondary);
}

body.dark-mode .stat-item p {
    color: var(--color-text-dark-secondary);
}

/* Services Section */
.services {
    padding: 80px 0;
    background: var(--color-bg-light);
}

body.dark-mode .services {
    background: var(--color-bg-dark);
}

.services h2 {
    font-size: 36px;
    margin-bottom: 50px;
    color: var(--color-primary);
    text-align: center;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--color-bg-light-secondary);
    padding: 30px;
    border-radius: 8px;
    border-left: 4px solid var(--color-primary);
    transition: all 0.3s ease;
}

body.dark-mode .service-card {
    background: var(--color-bg-dark-secondary);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(21, 100, 155, 0.15);
}

body.dark-mode .service-card:hover {
    box-shadow: 0 10px 30px rgba(21, 100, 155, 0.25);
}

.service-card h3 {
    color: var(--color-primary);
    font-size: 20px;
    margin-bottom: 15px;
}

.service-card p {
    color: var(--color-text-light-secondary);
    font-size: 15px;
}

body.dark-mode .service-card p {
    color: var(--color-text-dark-secondary);
}

/* Clients Section */
.clients {
    padding: 80px 0;
    background: var(--color-bg-light-secondary);
}

body.dark-mode .clients {
    background: var(--color-bg-dark-secondary);
}

.clients h2 {
    font-size: 36px;
    margin-bottom: 30px;
    color: var(--color-primary);
    text-align: center;
}

.clients p {
    font-size: 16px;
    margin-bottom: 20px;
    color: var(--color-text-light-secondary);
    text-align: center;
}

body.dark-mode .clients p {
    color: var(--color-text-dark-secondary);
}

.cargo-list {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    justify-content: center;
    margin-top: 40px;
}

.cargo-item {
    display: inline-block;
    background: var(--color-primary);
    color: white;
    padding: 10px 20px;
    border-radius: 25px;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.cargo-item:hover {
    background: var(--color-primary-light);
    transform: scale(1.05);
}

.clients-text {
    text-align: center;
    margin: 20px 0 !important;
    font-weight: 500;
}

/* Contact Section */
.contact {
    padding: 80px 0;
    background: var(--color-bg-light);
}

body.dark-mode .contact {
    background: var(--color-bg-dark);
}

.contact h2 {
    font-size: 36px;
    margin-bottom: 50px;
    color: var(--color-primary);
    text-align: center;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: start;
}

@media (max-width: 768px) {
    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

.contact-info {
    background: var(--color-bg-light-secondary);
    padding: 40px;
    border-radius: 8px;
    border-top: 4px solid var(--color-primary);
}

body.dark-mode .contact-info {
    background: var(--color-bg-dark-secondary);
}

.contact-info h3 {
    color: var(--color-primary);
    font-size: 20px;
    margin-bottom: 20px;
}

.contact-info p {
    color: var(--color-text-light-secondary);
    margin-bottom: 15px;
    font-size: 16px;
}

body.dark-mode .contact-info p {
    color: var(--color-text-dark-secondary);
}

.contact-info strong {
    color: var(--color-text-light);
}

body.dark-mode .contact-info strong {
    color: var(--color-text-dark);
}

.contact-detail a {
    display: flex;
    align-items: center;
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.contact-detail a:hover {
    color: var(--color-primary-light);
}

.contact-text {
    margin-left: 1rem;
}

/* Contact Form */
.contact-form {
    background: var(--color-bg-light-secondary);
    padding: 40px;
    border-radius: 8px;
    border-top: 4px solid var(--color-primary);
}

body.dark-mode .contact-form {
    background: var(--color-bg-dark-secondary);
}

.contact-form h3 {
    color: var(--color-primary);
    font-size: 20px;
    margin-bottom: 25px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: flex;
    color: var(--color-text-light);
    font-weight: 500;
    margin-bottom: 8px;
    font-size: 14px;
}

body.dark-mode .form-group label {
    color: var(--color-text-dark);
}

.form-group input[type="checkbox"]:checked {
    accent-color: var(--color-primary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--color-border-light);
    border-radius: 6px;
    font-family: inherit;
    font-size: 14px;
    background: var(--color-bg-light);
    color: var(--color-text-light);
    transition: all 0.3s ease;
}

body.dark-mode .form-group input,
body.dark-mode .form-group textarea {
    background: var(--color-bg-dark);
    border-color: var(--color-border-dark);
    color: var(--color-text-dark);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(21, 100, 155, 0.1);
}

body.dark-mode .form-group input:focus,
body.dark-mode .form-group textarea:focus {
    box-shadow: 0 0 0 3px rgba(21, 100, 155, 0.2);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-message {
    margin-top: 15px;
    padding: 12px;
    border-radius: 6px;
    display: none;
    font-size: 14px;
    font-weight: 500;
}

.form-message.success {
    background: rgba(34, 197, 94, 0.1);
    color: #22c55e;
    display: block;
    border-left: 4px solid #22c55e;
}

.form-message.error {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    display: block;
    border-left: 4px solid #ef4444;
}

/* Footer */
.footer {
    display: flex;
    align-items: center;
    background: var(--color-bg-dark-secondary);
    color: var(--color-text-dark);
    padding: 30px 0;
    text-align: center;
    border-top: 1px solid var(--color-border-dark);
}

body.dark-mode .footer {
    background: var(--color-bg-dark-secondary);
    color: var(--color-text-dark);
}

.footer p {
    margin: 0;
    font-size: 14px;
    color: var(--color-text-dark-secondary);
}

.footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;     
}

.footer .container img {
    height: 2rem;
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 15px;
    }

    .logo h1 {
        font-size: 20px;
    }

    .nav {
        gap: 15px;
    }

    .hero-content h2 {
        font-size: 32px;
    }

    .hero-content p {
        font-size: 16px;
    }

    .about h2,
    .services h2,
    .clients h2,
    .contact h2 {
        font-size: 28px;
    }

    .services-grid,
    .stats {
        grid-template-columns: 1fr;
    }
}

/* switch */
.switch {
  position: relative;
  display: inline-block;
  width: 50px;
  height: 27px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  -webkit-transition: 0.4s;
  transition: 0.4s;
}

.slider:before {
  position: absolute;
  content: "";
  height: 22.5px;
  width: 22.5px;
  left: 2px;
  bottom: 2px;
  background-color: var(--color-bg-light);
  -webkit-transition: 0.4s;
  transition: 0.4s;
}

input:checked + .slider {
  background-color: var(--color-primary);
}

input:checked + .slider:before {
  -webkit-transform: translateX(23px);
  -ms-transform: translateX(23px);
  transform: translateX(23px);
}

.slider {
  border-radius: 34px;
}

.slider:before {
  border-radius: 50%;
}

.checkbox-group {
    margin: 15px 0;
}

.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: 14px;
}

.checkbox-label input[type="checkbox"] {
    margin-right: 8px;
    margin-top: 3px;
    cursor: pointer;
    width: 18px;
    height: 18px;
}

.checkbox-label span {
    line-height: 1.4;
}

/* Modern Select Styles */
.select-wrapper {
    position: relative;
    display: block;
}

.select-wrapper select {
    width: 100%;
    padding: 12px 40px 12px 12px;
    border: 1px solid var(--color-border-light);
    border-radius: 6px;
    font-size: 14px;
    background: var(--color-bg-light);
    color: var(--color-text-light);
    cursor: pointer;
    transition: all 0.3s ease;
}

body.dark-mode .select-wrapper select {
    background: var(--color-bg-dark);
    border-color: var(--color-border-dark);
    color: var(--color-text-dark);
}

.confirm-text, .confirm-text:visited {
    color: var(--color-text-light);
}

body.dark-mode .confirm-text, body.dark-mode .confirm-text:visited {
    color: var(--color-text-dark);
}

select, input, textarea, label, button {
    font-family: 'Verdana', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
}