/* ============================================
   VARIABLES CSS - Colores y tipografía
   ============================================ */
:root {
    /* Colores principales */
    --primary: #0052CC;
    --primary-dark: #003D99;
    --primary-light: #0065FF;
    --secondary: #4C9AFF;
    --accent: #36B37E;
    
    /* Colores de fondo */
    --bg: #FFFFFF;
    --bg-light: #F5F7FA;
    --bg-dark: #172B4D;
    
    /* Colores de texto */
    --text-dark: #172B4D;
    --text-medium: #42526E;
    --text-light: #6B778C;
    
    /* Espaciado */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
    
    /* Tipografía */
    --font-family: 'Poppins', sans-serif;
    --font-size-base: 16px;
    --font-size-sm: 0.875rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    
    /* Sombras */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    
    /* Bordes */
    --border-radius: 8px;
    --border-radius-lg: 12px;
    
    /* Transiciones */
    --transition: all 0.3s ease;
}

/* ============================================
   RESET Y BASE
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg);
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

/* ============================================
   UTILIDADES
   ============================================ */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section__title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--text-dark);
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

.section__subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-medium);
    text-align: center;
    margin-bottom: var(--spacing-xl);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* Botones */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius);
    font-weight: 500;
    font-size: var(--font-size-base);
    cursor: pointer;
    border: none;
    transition: var(--transition);
    text-align: center;
}

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

.btn--primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

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

.btn--block {
    width: 100%;
}

/* ============================================
   HEADER
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-md);
    height: 70px;
    gap: var(--spacing-md);
}

.nav__brand {
    flex-shrink: 0;
}

.nav__logo {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.5px;
}

.nav__logo:hover {
    color: var(--primary-dark);
}

.nav__menu {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
    flex-wrap: wrap;
    justify-content: flex-end;
    flex: 1;
    min-width: 0;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav__item {
    white-space: nowrap;
    flex-shrink: 0;
    display: flex;
    align-items: center;
}

.nav__link {
    font-weight: 500;
    color: var(--text-dark);
    position: relative;
    padding: var(--spacing-xs) 0;
    white-space: nowrap;
    font-size: 0.95rem;
}

.nav__link--util {
    font-size: 0.9rem;
    padding: var(--spacing-xs) var(--spacing-sm);
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary);
    transition: width 0.3s ease;
}

.nav__link:hover::after,
.nav__link.active::after {
    width: 100%;
}

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

.nav__toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.nav__toggle-line {
    width: 25px;
    height: 3px;
    background-color: var(--text-dark);
    border-radius: 2px;
    transition: var(--transition);
}

/* ============================================
   HERO
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    padding-top: 70px;
    padding-bottom: var(--spacing-xxl);
    overflow: hidden;
}

.hero--page {
    min-height: 35vh;
    padding-top: 80px;
    padding-bottom: 2rem;
}

.hero__carousel {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.hero__slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 1s ease-in-out;
}

.hero__slide.active {
    opacity: 1;
}

/* Contenido dentro de cada slide del carrusel */
.hero__slide-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 3rem 2rem 6rem;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7) 0%, rgba(0, 0, 0, 0.3) 50%, transparent 100%);
    z-index: 2;
    color: white;
    text-align: center;
}

.hero__slide-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: white;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero__slide-description {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.95);
    max-width: 800px;
    margin: 0 auto;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
    line-height: 1.6;
}

/* Overlay más sutil cuando hay carrusel - solo una ligera sombra para legibilidad */
.hero__carousel + .hero__overlay {
    background: rgba(0, 0, 0, 0.2);
    /* Removido el overlay azul opaco */
}

.hero__carousel-controls {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 1rem;
    z-index: 3;
}

.hero__carousel-btn {
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.5);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.5rem;
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
}

.hero__carousel-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.8);
    transform: scale(1.1);
}

.hero__carousel-dots {
    display: flex;
    gap: 0.5rem;
}

.hero__carousel-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.5);
    background: transparent;
    cursor: pointer;
    transition: all 0.3s ease;
}

.hero__carousel-dot.active,
.hero__carousel-dot:hover {
    background: white;
    border-color: white;
    transform: scale(1.2);
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('../img/hero-tech.jpg');
    background-size: cover;
    background-position: center;
    opacity: 0.15;
    z-index: 0;
}

.hero__overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.2); /* Overlay más sutil - solo sombra ligera */
    z-index: 1;
}

.hero__content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
    max-width: 900px;
    padding: var(--spacing-lg) 0;
}

.hero--page .hero__content {
    padding: var(--spacing-sm) 0;
}

.hero__title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.8s ease;
}

.hero__description {
    font-size: var(--font-size-lg);
    line-height: 1.8;
    margin-bottom: var(--spacing-xl);
    opacity: 0.95;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero__buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.4s both;
}

/* ============================================
   SERVICIOS
   ============================================ */
.services {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg);
}

.services__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.service-card {
    background-color: var(--bg);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid #E4E7EB;
}

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

.service-card__icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.service-card__image {
    width: 100%;
    height: 200px;
    margin-bottom: var(--spacing-md);
    border-radius: var(--border-radius);
    overflow: hidden;
    background-color: var(--bg-light);
}

.service-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.service-card:hover .service-card__image img {
    transform: scale(1.05);
}

.service-card__title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
}

.service-card__description {
    color: var(--text-medium);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.service-card__list {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-md);
}

.service-card__list li {
    color: var(--text-medium);
    margin-bottom: var(--spacing-xs);
    position: relative;
    padding-left: var(--spacing-md);
}

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

.service-card__btn {
    display: inline-block;
    color: var(--primary);
    font-weight: 500;
    padding: var(--spacing-xs) 0;
    border-bottom: 2px solid transparent;
}

.service-card__btn:hover {
    border-bottom-color: var(--primary);
}

/* ============================================
   POR QUÉ ELEGIRNOS
   ============================================ */
.why-us {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg-light);
}

.why-us__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.why-card {
    background-color: var(--bg);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.why-card__icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.why-card__title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
}

.why-card__description {
    color: var(--text-medium);
    line-height: 1.7;
}

/* ============================================
   PROYECTOS
   ============================================ */
.projects {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg);
}

.projects__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.project-card {
    background-color: var(--bg);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid #E4E7EB;
    position: relative;
}

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

.project-card__badge {
    display: inline-block;
    background-color: var(--primary);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    font-weight: 500;
    margin-bottom: var(--spacing-md);
}

.project-card__title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
}

.project-card__description {
    color: var(--text-medium);
    line-height: 1.7;
}

/* ============================================
   CONTACTO
   ============================================ */
.contact {
    padding: var(--spacing-xxl) 0;
    background-color: var(--bg-light);
}

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

.contact__form-wrapper {
    background-color: var(--bg);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
}

.form__group {
    margin-bottom: var(--spacing-md);
}

.form__label {
    display: block;
    font-weight: 500;
    color: var(--text-dark);
    margin-bottom: var(--spacing-xs);
}

.form__input,
.form__textarea {
    width: 100%;
    padding: var(--spacing-sm);
    border: 2px solid #E4E7EB;
    border-radius: var(--border-radius);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    transition: var(--transition);
}

.form__input:focus,
.form__textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.form__textarea {
    resize: vertical;
}

.contact__info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.contact__info-item {
    display: flex;
    gap: var(--spacing-md);
    background-color: var(--bg);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
}

.contact__info-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.contact__info-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: var(--spacing-xs);
}

.contact__info-text {
    color: var(--text-medium);
}

.contact__info-text a {
    color: var(--primary);
}

.contact__info-text a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background-color: var(--bg-dark);
    color: #B3BAC5;
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
}

.footer__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer__logo {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: white;
    margin-bottom: var(--spacing-sm);
}

.footer__description {
    line-height: 1.7;
    color: #B3BAC5;
}

.footer__title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: white;
    margin-bottom: var(--spacing-md);
}

.footer__menu {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer__link {
    color: #B3BAC5;
    transition: var(--transition);
}

.footer__link:hover {
    color: white;
    padding-left: var(--spacing-xs);
}

.footer__text {
    margin-bottom: var(--spacing-xs);
    color: #B3BAC5;
}

.footer__social-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer__social-link {
    color: #B3BAC5;
    transition: var(--transition);
}

.footer__social-link:hover {
    color: white;
}

.footer__bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-lg);
    text-align: center;
}

.footer__copyright {
    color: #B3BAC5;
}

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

/* ============================================
   RESPONSIVE - TABLET (768px - 1024px)
   ============================================ */
@media (max-width: 1024px) {
    .hero__title {
        font-size: var(--font-size-3xl);
    }
    
    .section__title {
        font-size: var(--font-size-2xl);
    }
    
    .contact__grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   RESPONSIVE - TABLET Y PANTALLAS GRANDES
   ============================================ */
@media (min-width: 769px) and (max-width: 1200px) {
    .nav {
        padding: var(--spacing-md) var(--spacing-sm);
    }
    
    .nav__menu {
        gap: var(--spacing-sm);
        flex-wrap: wrap;
    }
    
    .nav__link {
        font-size: 0.9rem;
        padding: var(--spacing-xs) 0.25rem;
    }
    
    .nav__link--util {
        font-size: 0.85rem;
        padding: var(--spacing-xs) 0.5rem;
    }
}

@media (min-width: 1201px) and (max-width: 1400px) {
    .nav__menu {
        gap: var(--spacing-md);
    }
    
    .nav__link {
        font-size: 0.95rem;
    }
}

@media (min-width: 1401px) {
    .nav {
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    .nav__menu {
        gap: var(--spacing-lg);
        justify-content: flex-end;
    }
    
    .nav__link {
        font-size: 1rem;
    }
}

/* ============================================
   RESPONSIVE - MÓVIL (< 768px)
   ============================================ */
@media (max-width: 768px) {
    :root {
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.75rem;
        --font-size-2xl: 1.5rem;
        --spacing-xxl: 3rem;
        --spacing-xl: 2rem;
    }
    
    /* Header Mobile */
    .nav__menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background-color: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding: var(--spacing-xl) 0;
        gap: var(--spacing-lg);
        transition: left 0.3s ease;
        box-shadow: var(--shadow-lg);
    }
    
    .nav__menu.active {
        left: 0;
    }
    
    .nav__toggle {
        display: flex;
    }
    
    .nav__toggle.active .nav__toggle-line:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }
    
    .nav__toggle.active .nav__toggle-line:nth-child(2) {
        opacity: 0;
    }
    
    .nav__toggle.active .nav__toggle-line:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    /* Hero Mobile */
    .hero {
        min-height: 90vh;
        padding: 100px 0 var(--spacing-xl);
    }
    
    .hero__content {
        padding: var(--spacing-md) 0;
    }
    
    .hero__title {
        font-size: var(--font-size-2xl);
    }
    
    .hero__description {
        font-size: var(--font-size-base);
    }
    
    .hero__buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .hero__buttons .btn {
        width: 100%;
    }
    
    /* Secciones Mobile */
    .services__grid,
    .why-us__grid,
    .projects__grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .services,
    .why-us,
    .projects,
    .contact {
        padding: var(--spacing-xl) 0;
    }
    
    /* Footer Mobile */
    .footer__grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    /* Contacto Mobile */
    .contact__form-wrapper {
        padding: var(--spacing-lg);
    }
}

/* ============================================
   RESPONSIVE - MÓVIL PEQUEÑO (< 480px)
   ============================================ */
@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .section__title {
        font-size: var(--font-size-xl);
    }
    
    .section__subtitle {
        font-size: var(--font-size-base);
    }
    
    .service-card,
    .project-card,
    .why-card {
        padding: var(--spacing-md);
    }
}