:root {
    /* KRV Transporte Colors (Dunkelgrün) */
    --primary-green: #006400;
    --primary-dark: #1a1a1a;
    --primary-black: #000000;
    
    /* KRV Mobility Solutions Colors */
    --tech-blue: #0066B3;
    --tech-green: #7AC143;
    --tech-light: #E8F5E9;
    
    /* Neutral Colors */
    --white: #FFFFFF;
    --off-white: #F8F9FA;
    --gray-100: #F1F3F5;
    --gray-300: #DEE2E6;
    --gray-500: #6C757D;
    --gray-700: #495057;
    --gray-900: #212529;
    
    /* Typography */
    --font-heading: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-body: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 6rem;
    
    /* Transitions */
    --transition-fast: 200ms ease;
    --transition-base: 300ms ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-700);
    background: var(--white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.3;
    color: var(--gray-900);
}

h1 { font-size: clamp(2rem, 5vw, 3rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }

/* Header / Navigation */
.header {
    background: var(--primary-dark);
    padding: 0.5rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo img {
    height: 60px;
    width: auto;
}

.logo-text {
    color: var(--white);
    font-size: 1.1rem;
    font-weight: 400;
    letter-spacing: 0.5px;
}

.social-icons {
    display: flex;
    gap: 1rem;
    margin-left: auto;
    margin-right: 2rem;
}

.social-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid var(--primary-green);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-green);
    transition: all var(--transition-base);
    text-decoration: none;
    font-size: 1.2rem;
}

.social-icon:hover {
    background: var(--primary-green);
    color: var(--white);
    transform: scale(1.1);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 0;
    align-items: center;
}

.nav-menu li {
    position: relative;
}

.nav-link {
    display: block;
    padding: 1.2rem 1.5rem;
    color: var(--white);
    text-decoration: none;
    font-size: 1rem;
    transition: all var(--transition-base);
    border-bottom: 3px solid transparent;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-green);
    border-bottom-color: var(--primary-green);
}

/* Dropdown Menu */
.dropdown {
    position: relative;
}

.dropdown-toggle::after {
    content: ' ▼';
    font-size: 0.7rem;
    margin-left: 0.3rem;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--gray-900);
    min-width: 250px;
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-base);
    box-shadow: 0 5px 20px rgba(0,0,0,0.3);
}

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

.dropdown-menu .nav-link {
    border-bottom: none;
    border-left: 3px solid transparent;
}

.dropdown-menu .nav-link:hover {
    background: rgba(0, 100, 0, 0.1);
    border-left-color: var(--primary-green);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--white);
    transition: all var(--transition-base);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 600px;
    display: flex;
    align-items: center;
    color: var(--white);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 100, 0, 0.9) 0%, rgba(0, 80, 0, 0.95) 100%);
    z-index: -1;
}

.hero-content {
    max-width: 900px;
    text-align: center;
    margin: 0 auto;
    animation: fadeInUp 1s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero h1 {
    color: var(--white);
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.3rem);
    margin-bottom: 2rem;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
}

.hero p {
    font-size: clamp(0.95rem, 1.5vw, 1.1rem);
    margin-bottom: 2rem;
    line-height: 1.8;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 4px;
    transition: all var(--transition-base);
    border: 2px solid transparent;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: var(--primary-green);
    color: var(--white);
    border-color: var(--primary-green);
}

.btn-primary:hover {
    background: #005200;
    border-color: #005200;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 100, 0, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border-color: var(--white);
}

.btn-secondary:hover {
    background: var(--white);
    color: var(--primary-green);
}

/* Content Sections */
section {
    padding: var(--space-xl) 0;
}

.section-light {
    background: var(--white);
}

.section-gray {
    background: var(--gray-100);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-lg);
}

.section-title {
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: var(--primary-green);
}

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

.card {
    background: var(--white);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: all var(--transition-base);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

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

.card ul {
    list-style: none;
}

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

.card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-green);
    font-weight: bold;
}

/* Two Column Layout */
.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

/* Contact Form */
.contact-form {
    background: var(--gray-100);
    padding: 2rem;
    border-radius: 8px;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--gray-900);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--gray-300);
    border-radius: 4px;
    font-family: var(--font-body);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-green);
}

/* Footer */
.footer {
    background: var(--primary-dark);
    color: var(--white);
    padding: var(--space-lg) 0 var(--space-md);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer h4 {
    color: var(--primary-green);
    margin-bottom: 1rem;
}

.footer ul {
    list-style: none;
}

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

.footer a:hover {
    color: var(--primary-green);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
}

/* Mobility Solutions Page - Tech Theme */
.tech-header {
    background: linear-gradient(135deg, var(--tech-blue) 0%, var(--tech-green) 100%);
}

.tech-hero {
    background: linear-gradient(135deg, var(--tech-blue) 0%, var(--tech-green) 100%);
}

.tech-card {
    border-left: 4px solid var(--tech-blue);
}

.tech-card:hover {
    border-left-color: var(--tech-green);
}

.tech-icon {
    font-size: 3rem;
    color: var(--tech-blue);
    margin-bottom: 1rem;
}

.app-showcase {
    background: var(--tech-light);
    padding: 3rem;
    border-radius: 12px;
    border: 2px solid var(--tech-green);
}

/* Responsive Design */
@media (max-width: 968px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--gray-900);
        flex-direction: column;
        padding: 1rem 0;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
        gap: 0;
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .social-icons {
        margin-right: 1rem;
    }
    
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: rgba(0,0,0,0.3);
        max-height: 0;
        overflow: hidden;
    }
    
    .dropdown.active .dropdown-menu {
        max-height: 500px;
    }
    
    .two-col,
    .card-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 640px) {
    .logo img {
        height: 50px;
    }
    
    .logo-text {
        font-size: 0.9rem;
    }
    
    .social-icons {
        display: none;
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-green { color: var(--primary-green); }
.text-blue { color: var(--tech-blue); }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mt-2 { margin-top: 2rem; }