/* ===========================
   Variables CSS (Design System)
   =========================== */
:root {
    /* Colores Primarios - Paleta Salmon Profesional */
    --color-primary: #FF8A65;
    --color-primary-dark: #FF6F47;
    --color-primary-light: #FFB899;
    --color-primary-lightest: #FFE8DF;

    /* Colores Secundarios */
    --color-secondary: #0F172A;
    --color-secondary-light: #1E293B;
    --color-secondary-lighter: #334155;

    /* Colores de Acento */
    --color-accent: #60A5FA;
    --color-accent-dark: #3B82F6;

    /* Colores de Fondo */
    --color-bg: #F8FAFC;
    --color-bg-dark: #E2E8F0;
    --color-white: #FFFFFF;

    /* Colores de Texto */
    --color-text: #334155;
    --color-text-light: #64748B;
    --color-text-lighter: #94A3B8;

    /* Gradientes */
    --gradient-primary: linear-gradient(135deg, #FF8A65 0%, #FF6F47 100%);
    --gradient-secondary: linear-gradient(135deg, #60A5FA 0%, #3B82F6 100%);
    --gradient-hero: linear-gradient(135deg, rgba(255, 138, 101, 0.1) 0%, rgba(96, 165, 250, 0.1) 100%);

    /* Sombras */
    --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);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-primary: 0 10px 30px -5px rgba(255, 138, 101, 0.3);

    /* Tipografía */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;

    /* Espaciado */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    /* Transiciones */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Contenedor */
    --container-width: 1200px;
    --container-padding: 1.5rem;
}

/* ===========================
   Reset y Base Styles
   =========================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

/* ===========================
   Utilidades Generales
   =========================== */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

section {
    padding: var(--spacing-3xl) 0;
}

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

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

ul {
    list-style: none;
}

/* ===========================
   Componentes Reutilizables
   =========================== */

/* Botones */
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.button--primary {
    background: var(--gradient-primary);
    color: var(--color-white);
    box-shadow: var(--shadow-primary);
}

.button--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 35px -5px rgba(255, 138, 101, 0.4);
}

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

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

.button--full {
    width: 100%;
}

/* Section Headers */
.section__subtitle {
    display: inline-block;
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.section__title {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.section__description {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    max-width: 600px;
}

.section__header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section__header .section__description {
    margin: 0 auto;
}

/* ===========================
   HEADER & NAVIGATION
   =========================== */
.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: all var(--transition-base);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.nav__logo-img {
    height: 60px;
    width: auto;
    transition: transform var(--transition-base);
}

.nav__logo-img:hover {
    transform: scale(1.05);
}

.nav__list {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav__link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    position: relative;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
}

.nav__link:hover::after,
.nav__link.active::after {
    width: 80%;
}

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

.nav__toggle,
.nav__close {
    display: none;
    cursor: pointer;
    color: var(--color-secondary);
}

/* ===========================
   HERO SECTION
   =========================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(255, 138, 101, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 20s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -50%;
    left: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(96, 165, 250, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 15s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(-30px, -30px); }
}

.hero__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero__content {
    animation: fadeInUp 1s ease-out;
}

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

.hero__title {
    font-size: var(--font-size-6xl);
    font-weight: 800;
    color: var(--color-secondary);
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
}

.hero__title-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
}

.hero__description {
    font-size: var(--font-size-xl);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

.hero__buttons {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

.hero__stats {
    display: flex;
    gap: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-bg-dark);
}

.stat__number {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat__label {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    margin-top: 0.25rem;
}

.hero__image {
    position: relative;
    animation: fadeInRight 1s ease-out 0.3s both;
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.hero__img {
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
    animation: levitate 6s ease-in-out infinite;
}

@keyframes levitate {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.scroll-down {
    position: absolute;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: translate(-50%, 0); }
    50% { transform: translate(-50%, 10px); }
}

/* ===========================
   SERVICES SECTION
   =========================== */
.services {
    background-color: var(--color-white);
}

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

.service__card {
    background-color: var(--color-bg);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.service__card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.service__card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary-light);
}

.service__card:hover::before {
    transform: scaleX(1);
}

.service__card--featured {
    background: linear-gradient(135deg, rgba(255, 138, 101, 0.05) 0%, rgba(96, 165, 250, 0.05) 100%);
    border-color: var(--color-primary);
}

.service__badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: var(--gradient-primary);
    color: var(--color-white);
    font-size: var(--font-size-xs);
    font-weight: 600;
    padding: 0.375rem 0.875rem;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.service__icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
}

.service__title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-sm);
}

.service__description {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.service__features {
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
}

.service__features li {
    color: var(--color-text);
    font-size: var(--font-size-sm);
    display: flex;
    align-items: center;
}

/* ===========================
   TECHNOLOGIES SECTION
   =========================== */
.technologies {
    background-color: var(--color-secondary);
    color: var(--color-white);
}

.technologies .section__subtitle {
    color: var(--color-primary-light);
}

.technologies .section__title {
    color: var(--color-white);
}

.technologies__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--spacing-md);
}

.tech__item {
    background-color: var(--color-secondary-light);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    text-align: center;
    font-weight: 600;
    border: 2px solid transparent;
    transition: all var(--transition-base);
}

.tech__item:hover {
    border-color: var(--color-primary);
    transform: translateY(-5px);
    box-shadow: var(--shadow-primary);
}

/* ===========================
   ABOUT SECTION
   =========================== */
.about {
    background-color: var(--color-white);
}

.about__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.about__image {
    position: relative;
}

.about__img {
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
}

.about__content .section__title {
    text-align: left;
}

.about__description {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
    font-size: var(--font-size-lg);
}

.about__values {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.value__item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--color-bg);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--color-primary);
}

.value__item svg {
    color: var(--color-primary);
    flex-shrink: 0;
    margin-top: 0.25rem;
}

.value__item h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-secondary);
    margin-bottom: 0.25rem;
}

.value__item p {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
}

/* ===========================
   CONTACT SECTION
   =========================== */
.contact {
    background: var(--gradient-hero);
}

.contact__grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--spacing-3xl);
}

.contact__info .section__title {
    text-align: left;
}

.contact__description {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

.contact__details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

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

.contact__item svg {
    color: var(--color-primary);
    flex-shrink: 0;
}

.contact__item h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-secondary);
    margin-bottom: 0.25rem;
}

.contact__item a,
.contact__item p {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
}

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

/* Form Styles */
.contact__form {
    background-color: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
}

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

.form__label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-secondary);
    margin-bottom: 0.5rem;
}

.form__input {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--color-bg-dark);
    border-radius: var(--radius-md);
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    color: var(--color-text);
    transition: all var(--transition-base);
    background-color: var(--color-bg);
}

.form__input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(255, 138, 101, 0.1);
}

.form__textarea {
    resize: vertical;
    min-height: 120px;
}

/* ===========================
   FOOTER
   =========================== */
.footer {
    background-color: var(--color-secondary);
    color: var(--color-white);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

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

.footer__logo {
    height: 50px;
    width: auto;
    margin-bottom: var(--spacing-md);
    filter: brightness(0) invert(1);
}

.footer__description {
    color: var(--color-text-lighter);
    line-height: 1.7;
}

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

.footer__links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer__links a {
    color: var(--color-text-lighter);
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
}

.footer__links a:hover {
    color: var(--color-primary);
    padding-left: 0.5rem;
}

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

.social__link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-secondary-light);
    border-radius: var(--radius-md);
    color: var(--color-white);
    transition: all var(--transition-base);
}

.social__link:hover {
    background: var(--gradient-primary);
    transform: translateY(-3px);
}

.footer__bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-secondary-lighter);
    color: var(--color-text-lighter);
    font-size: var(--font-size-sm);
}

.footer__legal {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

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

/* ===========================
   SCROLL TO TOP BUTTON
   =========================== */
.scroll-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: var(--color-white);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-xl);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 999;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-2xl);
}

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

/* Tablet */
@media screen and (max-width: 968px) {
    :root {
        --font-size-6xl: 2.5rem;
        --font-size-5xl: 2rem;
        --font-size-4xl: 1.875rem;
        --font-size-3xl: 1.5rem;
        --spacing-3xl: 4rem;
    }

    .hero__container,
    .about__grid,
    .contact__grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .hero__image {
        order: -1;
    }

    .hero__buttons {
        flex-direction: column;
    }

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

    .footer__col:first-child {
        grid-column: 1 / -1;
    }
}

/* Mobile */
@media screen and (max-width: 768px) {
    .nav__menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 350px;
        height: 100vh;
        background-color: var(--color-white);
        padding: var(--spacing-xl);
        box-shadow: var(--shadow-2xl);
        transition: right var(--transition-base);
    }

    .nav__menu.show-menu {
        right: 0;
    }

    .nav__list {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
        margin-top: var(--spacing-2xl);
    }

    .nav__link {
        display: block;
        width: 100%;
        padding: var(--spacing-sm);
    }

    .nav__toggle,
    .nav__close {
        display: block;
    }

    .nav__close {
        position: absolute;
        top: var(--spacing-md);
        right: var(--spacing-md);
    }

    .hero__stats {
        flex-wrap: wrap;
    }

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

    .technologies__grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .footer__bottom {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }
}

@media screen and (max-width: 480px) {
    :root {
        --font-size-6xl: 2rem;
        --font-size-4xl: 1.5rem;
        --container-padding: 1rem;
        --spacing-2xl: 2.5rem;
        --spacing-3xl: 3rem;
    }

    .button {
        padding: 0.75rem 1.5rem;
        font-size: var(--font-size-sm);
    }

    .hero {
        padding-top: 60px;
    }

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

/* ===========================
   ANIMACIONES & EFECTOS
   =========================== */

/* Fade in on scroll */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Loading animation */
@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading {
    animation: spin 1s linear infinite;
}

/* Pulse animation */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.pulse {
    animation: pulse 2s ease-in-out infinite;
}