/* ===========================
   VARIABLES Y ESTILOS GLOBALES
   =========================== */

:root {
    --primary-color: #0052CC;
    --secondary-color: #F5F5F5;
    --dark-bg: #0F1117;
    --text-dark: #1F2937;
    --text-light: #6B7280;
    --border-color: #E5E7EB;
    --success-color: #10B981;
    --warning-color: #F59E0B;
    --padding-lg: 80px;
    --padding-md: 40px;
    --padding-sm: 20px;
    --transition: all 0.3s ease;
}

* {
    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;
    color: var(--text-dark);
    background-color: #FFFFFF;
    line-height: 1.6;
}

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

/* ===========================
   HEADER / NAVBAR
   =========================== */

.header {
    background: white;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 1rem 0;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
}

.logo svg {
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-menu a {
    color: var(--text-dark);
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.95rem;
}

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

.btn-login {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.7rem 1.5rem;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.btn-login:hover {
    background: #0047B2;
    transform: translateY(-2px);
}

/* ===========================
   BOTONES
   =========================== */

.btn {
    padding: 0.8rem 2rem;
    border: none;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
}

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

.btn-primary:hover {
    background: #0047B2;
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(0, 82, 204, 0.3);
}

.btn:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.btn-secondary {
    background: white;
    color: var(--text-dark);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
}

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

/* ===========================
   HERO SECTION
   =========================== */

.hero {
    padding: var(--padding-lg) var(--padding-sm);
    text-align: center;
    background: linear-gradient(135deg, #F9FAFB 0%, #F3F4F6 100%);
}

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

.hero h1 {
    font-size: 3rem;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
    font-weight: 700;
}

.hero p {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 4rem;
    flex-wrap: wrap;
}

/* ===========================
   DASHBOARD PREVIEW
   =========================== */

.dashboard-preview {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    margin-top: 3rem;
    text-align: left;
}

.dashboard-preview h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
    font-weight: 600;
}

.active-shipments {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.status-dot {
    color: var(--success-color);
    font-size: 1.2rem;
}

.shipments-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.shipment-card {
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    background: white;
    transition: var(--transition);
}

.shipment-card:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(0, 82, 204, 0.1);
}

.shipment-card.shipment-warning {
    border-color: var(--warning-color);
    background: #FFF8F0;
}

.shipment-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.shipment-id {
    font-weight: 600;
    color: var(--text-dark);
}

.badge {
    font-size: 0.75rem;
    padding: 0.35rem 0.7rem;
    border-radius: 4px;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-normal {
    background: #D1FAE5;
    color: #065F46;
}

.badge-warning {
    background: #FED7AA;
    color: #92400E;
}

.shipment-data h4 {
    font-size: 2rem;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.shipment-data p {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* ===========================
   CARACTERÍSTICAS SECTION
   =========================== */

.caracteristicas {
    padding: var(--padding-lg) var(--padding-sm);
    background: white;
}

.caracteristicas .container {
    max-width: 1100px;
}

.caracteristicas h2,
.como-funciona h2,
.beneficios h2,
.cta h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.section-subtitle {
    text-align: center;
    color: var(--text-light);
    font-size: 1.1rem;
    margin-bottom: 3rem;
}

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

.feature-card {
    padding: 2rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: white;
    transition: var(--transition);
    text-align: center;
}

.feature-card:hover {
    border-color: var(--primary-color);
    box-shadow: 0 12px 24px rgba(0, 82, 204, 0.15);
    transform: translateY(-8px);
}

.feature-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #EBF2FF;
    border-radius: 8px;
    color: var(--primary-color);
}

.feature-icon.icon-alert {
    background: #FFE8E8;
    color: #EF4444;
}

.feature-icon.icon-history {
    background: #E8F8F0;
    color: var(--success-color);
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.7;
}

/* ===========================
   CÓMO FUNCIONA SECTION
   =========================== */

.como-funciona {
    padding: var(--padding-lg) var(--padding-sm);
    background: white;
}

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

.step-card {
    text-align: center;
}

.step-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    font-size: 1.5rem;
    font-weight: bold;
    margin: 0 auto 1.5rem;
}

.step-card h3 {
    font-size: 1.15rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
    font-weight: 600;
}

.step-card p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* ===========================
   BENEFICIOS SECTION
   =========================== */

.beneficios {
    padding: var(--padding-lg) var(--padding-sm);
    background: var(--primary-color);
    color: white;
}

.beneficios h2 {
    color: white;
}

.beneficios .section-subtitle {
    color: rgba(255, 255, 255, 0.8);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.benefit-card {
    text-align: center;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
}

.benefit-card:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-4px);
}

.benefit-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 8px;
}

.benefit-card h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.benefit-card p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ===========================
   CTA SECTION
   =========================== */

.cta {
    padding: var(--padding-lg) var(--padding-sm);
    text-align: center;
    background: white;
}

.cta h2 {
    margin-bottom: 1rem;
}

.cta p {
    color: var(--text-light);
    font-size: 1.1rem;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ===========================
   FOOTER
   =========================== */

.footer {
    background: var(--dark-bg);
    color: #E5E7EB;
    padding: var(--padding-lg) var(--padding-sm) var(--padding-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.25rem;
    font-weight: bold;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.footer-column h4 {
    color: white;
    margin-bottom: 1rem;
    font-weight: 600;
}

.footer-column p {
    color: #9CA3AF;
    font-size: 0.9rem;
    line-height: 1.6;
}

.footer-column ul {
    list-style: none;
}

.footer-column ul li {
    margin-bottom: 0.7rem;
}

.footer-column a {
    color: #9CA3AF;
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.9rem;
}

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

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 2rem;
    text-align: center;
    color: #6B7280;
    font-size: 0.9rem;
}

/* ===========================
   RESPONSIVE DESIGN
   =========================== */

@media (max-width: 768px) {
    .header-content {
        flex-wrap: wrap;
        gap: 1rem;
    }

    .nav-menu {
        gap: 1rem;
        order: 3;
        width: 100%;
        flex-direction: column;
        display: none;
    }

    .hero {
        padding: var(--padding-md) var(--padding-sm);
    }

    .hero h1 {
        font-size: 2rem;
    }

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

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }

    .caracteristicas,
    .como-funciona,
    .beneficios,
    .cta {
        padding: var(--padding-md) var(--padding-sm);
    }

    .caracteristicas h2,
    .como-funciona h2,
    .beneficios h2,
    .cta h2 {
        font-size: 1.75rem;
    }

    .features-grid,
    .steps-grid,
    .benefits-grid {
        grid-template-columns: 1fr;
    }

    .shipments-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    :root {
        --padding-lg: 40px;
        --padding-md: 20px;
    }

    .hero h1 {
        font-size: 1.5rem;
    }

    .hero-buttons {
        gap: 0.5rem;
    }

    .dashboard-preview {
        padding: 1rem;
    }

    .btn,
    .btn-login {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }

    .feature-card,
    .step-card {
        padding: 1.5rem;
    }

    .shipment-data h4 {
        font-size: 1.5rem;
    }

    .footer-content {
        flex-direction: column;
        gap: 2rem;
    }
}

/* ===========================
   OPTIMIZACIONES MOBILE
   =========================== */

@media (max-width: 640px) {
    .nav-menu {
        display: none;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 0.5rem;
    }

    .btn {
        width: 100%;
    }

    .shipments-grid {
        grid-template-columns: 1fr;
    }

    .container {
        padding: 0 1rem;
    }
}