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

:root {
    --color-primary: #1e3a5f;
    --color-primary-dark: #152840;
    --color-accent: #3b82f6;
    --color-accent-light: #60a5fa;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-white: #ffffff;
    --color-text: #1f2937;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --container-max-width: 1200px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --border-radius: 0.5rem;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

body {
    font-family: var(--font-family);
    color: var(--color-text);
    line-height: 1.6;
    background-color: var(--color-white);
}

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

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

#header {
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
    gap: var(--spacing-md);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

.nav {
    display: none;
    gap: var(--spacing-lg);
}

.nav-link {
    color: var(--color-gray-700);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.btn-primary {
    background-color: var(--color-accent);
    color: var(--color-white);
    border: none;
    padding: 0.625rem 1.25rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease;
    font-size: 0.875rem;
}

.btn-primary:hover,
.btn-primary:focus {
    background-color: var(--color-accent-light);
}

.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    padding: var(--spacing-2xl) 0;
}

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

.hero-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.95;
}

.search-container {
    margin-bottom: var(--spacing-lg);
}

.search-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.search-input-wrapper {
    position: relative;
    flex: 1;
}

.search-input {
    width: 100%;
    padding: 0.875rem 2.5rem 0.875rem 1rem;
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--color-accent-light);
}

.clear-btn {
    position: absolute;
    right: 0.5rem;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    color: var(--color-gray-400);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    line-height: 1;
    display: none;
}

.clear-btn:hover {
    color: var(--color-gray-600);
}

.search-input:not(:placeholder-shown) ~ .clear-btn {
    display: block;
}

.btn-search {
    background-color: var(--color-accent-light);
    color: var(--color-white);
    border: none;
    padding: 0.875rem 2rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease;
    font-size: 1rem;
}

.btn-search:hover,
.btn-search:focus {
    background-color: var(--color-accent);
}

.search-help {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.875rem;
}

.hero-badge {
    display: inline-block;
    background-color: rgba(255, 255, 255, 0.15);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    font-size: 0.875rem;
    font-weight: 500;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--color-primary);
}

.historia {
    padding: var(--spacing-2xl) 0;
    background-color: var(--color-gray-100);
}

.historia-content {
    max-width: 800px;
    margin: 0 auto;
}

.historia-text {
    margin-bottom: var(--spacing-md);
    color: var(--color-gray-700);
    text-align: center;
}

.timeline {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.timeline-item {
    background-color: var(--color-white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.timeline-year {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: var(--spacing-xs);
}

.timeline-desc {
    color: var(--color-gray-700);
}

.solucion {
    padding: var(--spacing-2xl) 0;
}

.cards-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

.card {
    background-color: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-accent);
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.card-text {
    color: var(--color-gray-600);
}

.confianza {
    padding: var(--spacing-2xl) 0;
    background-color: var(--color-gray-100);
}

.logos-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.logo-placeholder {
    background-color: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    text-align: center;
    color: var(--color-gray-400);
    font-weight: 600;
    box-shadow: var(--shadow-sm);
}

.testimonial {
    max-width: 700px;
    margin: 0 auto;
    background-color: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
}

.testimonial-text {
    font-style: italic;
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.testimonial-author {
    color: var(--color-gray-600);
    font-weight: 600;
    font-size: 0.875rem;
}

.footer {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.footer-subtitle {
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.footer-text {
    opacity: 0.9;
    line-height: 1.8;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: var(--spacing-md);
    text-align: center;
    opacity: 0.8;
    font-size: 0.875rem;
}

.tracking-result {
    background-color: var(--color-white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    margin-top: var(--spacing-lg);
    overflow: hidden;
}

.tracking-status {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: var(--spacing-md);
    font-weight: 600;
    font-size: 1rem;
}

.status-en-transito {
    background-color: #3b82f6;
    color: var(--color-white);
}

.status-entregado {
    background-color: #10b981;
    color: var(--color-white);
}

.status-icon {
    font-size: 1.5rem;
}

.status-text {
    flex: 1;
}

.tracking-events {
    padding: var(--spacing-md);
}

.event-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-gray-200);
}

.event-item:last-child {
    border-bottom: none;
}

.event-time {
    min-width: 70px;
    text-align: left;
    color: var(--color-gray-600);
}

.event-day {
    font-size: 0.875rem;
    font-weight: 500;
    line-height: 1.2;
}

.event-hour {
    font-size: 0.875rem;
    line-height: 1.2;
}

.event-details {
    flex: 1;
}

.event-description {
    color: var(--color-gray-800);
    font-weight: 500;
    margin-bottom: 0.25rem;
    line-height: 1.4;
}

.event-place {
    color: var(--color-gray-500);
    font-size: 0.875rem;
    line-height: 1.3;
}

.loading-skeleton {
    background: linear-gradient(90deg, var(--color-gray-200) 25%, var(--color-gray-100) 50%, var(--color-gray-200) 75%);
    background-size: 200% 100%;
    animation: loading 1.5s ease-in-out infinite;
    border-radius: var(--border-radius);
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-card {
    background-color: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    margin-top: var(--spacing-lg);
}

.skeleton-title {
    height: 1.5rem;
    width: 60%;
    margin-bottom: var(--spacing-md);
}

.skeleton-line {
    height: 1rem;
    margin-bottom: var(--spacing-sm);
}

.skeleton-line:last-child {
    width: 80%;
}

.error-message, .empty-message {
    background-color: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    margin-top: var(--spacing-lg);
    text-align: center;
}

.error-message {
    border-left: 4px solid #ef4444;
    color: var(--color-gray-700);
}

.empty-message {
    border-left: 4px solid var(--color-gray-400);
    color: var(--color-gray-600);
}

@media (min-width: 640px) {
    .search-form {
        flex-direction: row;
    }
    
    .btn-search {
        width: auto;
    }
}

@media (min-width: 768px) {
    .nav {
        display: flex;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .timeline {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .cards-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .logos-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .footer-content {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1024px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .container {
        padding: 0 var(--spacing-lg);
    }
}