/* ============================================
   VARIABLES CSS - Personalización fácil
   ============================================ */
:root {
    /* Colores */
    --color-primary: #1a1a1a;       /* Negro carbón */
    --color-secondary: #ffffff;     /* Blanco puro */
    --color-accent: #ff6b35;        /* Naranja energético */
    --color-accent-light: #ff8b5c;
    --color-gray: #666666;          /* Texto secundario */
    --color-light-gray: #f9f9f9;    /* Fondos claros */
    --color-border: #eaeaea;
    --color-success: #4caf50;
    --color-error: #f44336;

    /* Tipografía */
    --font-heading: 'Bebas Neue', sans-serif;
    --font-body: 'Open Sans', sans-serif;
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Tamaños de fuente (mobile-first) */
    --fs-xs: 0.75rem;   /* 12px */
    --fs-sm: 0.875rem;  /* 14px */
    --fs-base: 1rem;    /* 16px */
    --fs-md: 1.125rem;  /* 18px */
    --fs-lg: 1.5rem;    /* 24px */
    --fs-xl: 2rem;      /* 32px */
    --fs-2xl: 2.5rem;   /* 40px */
    --fs-3xl: 3.5rem;   /* 56px */

    /* Espaciados */
    --space-xs: 0.5rem;   /* 8px */
    --space-sm: 1rem;     /* 16px */
    --space-md: 1.5rem;   /* 24px */
    --space-lg: 2rem;     /* 32px */
    --space-xl: 3rem;     /* 48px */
    --space-2xl: 4rem;    /* 64px */

    /* Bordes y sombras */
    --border-radius: 8px;
    --border-radius-lg: 16px;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.15);
    --shadow-accent: 0 6px 20px rgba(255, 107, 53, 0.3);

    /* Transiciones */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Breakpoints */
    --breakpoint-tablet: 768px;
    --breakpoint-desktop: 1200px;
}

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

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

body {
    font-family: var(--font-body);
    font-weight: var(--font-weight-regular);
    color: var(--color-primary);
    background-color: var(--color-secondary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

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

ul, ol {
    list-style: none;
}

button, input, select, textarea {
    font-family: inherit;
    font-size: inherit;
    border: none;
    background: none;
    outline: none;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

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

.section__title {
    font-family: var(--font-heading);
    font-size: var(--fs-2xl);
    text-align: center;
    margin-bottom: var(--space-sm);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.section__title span {
    color: var(--color-accent);
}

.section__subtitle {
    text-align: center;
    color: var(--color-gray);
    margin-bottom: var(--space-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--border-radius);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
    white-space: nowrap;
}

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

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

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

.btn--secondary:hover {
    background-color: #333;
    transform: translateY(-2px);
}

.btn--outline {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.btn--outline:hover {
    background-color: var(--color-accent);
    color: var(--color-secondary);
}

/* ============================================
   HEADER / NAVBAR
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    box-shadow: var(--shadow);
    z-index: 1000;
    padding: var(--space-sm) 0;
}

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

.nav__logo {
    font-family: var(--font-heading);
    font-size: var(--fs-xl);
    color: var(--color-primary);
}

.nav__logo span {
    color: var(--color-accent);
}

.nav__list {
    display: none; /* Oculto en mobile */
    gap: var(--space-lg);
    align-items: center;
}

.nav__list li a {
    font-weight: var(--font-weight-medium);
    position: relative;
}

.nav__list li a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: width var(--transition-normal);
}

.nav__list li a:hover::after {
    width: 100%;
}

.nav__toggle {
    width: 40px;
    height: 30px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    cursor: pointer;
}

.nav__toggle span {
    display: block;
    height: 3px;
    width: 100%;
    background-color: var(--color-primary);
    transition: transform var(--transition-normal), opacity var(--transition-normal);
}

/* ============================================
   HERO
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    color: var(--color-secondary);
    padding-top: 80px; /* Compensa navbar fija */
}

.hero__bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    z-index: -1;
}

.hero__bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0,0,0,0.7) 0%, rgba(0,0,0,0.4) 100%);
}

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

.hero__title {
    font-family: var(--font-heading);
    font-size: var(--fs-3xl);
    line-height: 1.1;
    margin-bottom: var(--space-md);
}

.hero__title span {
    color: var(--color-accent);
}

.hero__subtitle {
    font-size: var(--fs-md);
    margin-bottom: var(--space-xl);
    opacity: 0.9;
}

.hero__cta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    justify-content: center;
    margin-bottom: var(--space-2xl);
}

.hero__stats {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-xl);
}

.stat {
    text-align: center;
}

.stat__number {
    font-family: var(--font-heading);
    font-size: var(--fs-2xl);
    color: var(--color-accent);
    margin-bottom: var(--space-xs);
}

.stat__label {
    font-size: var(--fs-sm);
    opacity: 0.9;
}

/* ============================================
   ABOUT
   ============================================ */
.about__grid {
    display: grid;
    gap: var(--space-xl);
}

.about__image img {
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
}

.about__bio {
    font-size: var(--fs-md);
    margin-bottom: var(--space-lg);
}

.about__certifications h3 {
    font-size: var(--fs-lg);
    margin-bottom: var(--space-sm);
}

.about__certifications ul {
    margin-bottom: var(--space-lg);
}

.about__certifications li {
    padding-left: var(--space-md);
    position: relative;
    margin-bottom: var(--space-xs);
}

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

.about__quote {
    font-style: italic;
    font-size: var(--fs-md);
    border-left: 4px solid var(--color-accent);
    padding-left: var(--space-md);
    color: var(--color-gray);
}

/* ============================================
   SERVICES
   ============================================ */
.services__grid {
    display: grid;
    gap: var(--space-lg);
}

.service {
    background: var(--color-secondary);
    border-radius: var(--border-radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.service:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.service__icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--space-md);
    background-color: rgba(255, 107, 53, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.service__icon svg {
    width: 30px;
    height: 30px;
    stroke: var(--color-accent);
}

.service h3 {
    font-size: var(--fs-lg);
    margin-bottom: var(--space-sm);
}

.service p {
    color: var(--color-gray);
    margin-bottom: var(--space-md);
}

.service__price {
    font-size: var(--fs-md);
    margin-bottom: var(--space-md);
}

/* ============================================
   PROCESS TIMELINE
   ============================================ */
.process__timeline {
    display: grid;
    gap: var(--space-lg);
    position: relative;
}

.process__timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 30px;
    width: 2px;
    background-color: var(--color-accent);
    display: none;
}

.timeline__step {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
}

.step__number {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: var(--color-accent);
    color: var(--color-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-size: var(--fs-xl);
}

.timeline__step h3 {
    font-size: var(--fs-lg);
    margin-bottom: var(--space-xs);
}

/* ============================================
   TRANSFORMATIONS GALLERY
   ============================================ */
.transformations__gallery {
    display: grid;
    gap: var(--space-xl);
}

.gallery__item {
    background: var(--color-secondary);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.gallery__item > div {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

.before, .after {
    position: relative;
}

.before img, .after img {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.label {
    position: absolute;
    bottom: 10px;
    left: 10px;
    background-color: rgba(0, 0, 0, 0.7);
    color: var(--color-secondary);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--border-radius);
    font-size: var(--fs-xs);
}

.gallery__info {
    padding: var(--space-lg);
}

.gallery__info h4 {
    font-size: var(--fs-md);
    margin-bottom: var(--space-xs);
}

/* ============================================
   TESTIMONIALS SLIDER
   ============================================ */
.testimonials__slider {
    position: relative;
    overflow: hidden;
}

.slider__track {
    display: flex;
    transition: transform var(--transition-normal);
    gap: var(--space-lg);
}

.testimonial {
    flex: 0 0 100%;
    background: var(--color-secondary);
    border-radius: var(--border-radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow);
}

.testimonial__header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.testimonial__header img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
}

.stars {
    color: #ffc107;
    font-size: var(--fs-md);
}

.testimonial__goal {
    display: inline-block;
    margin-top: var(--space-md);
    padding: var(--space-xs) var(--space-sm);
    background-color: rgba(255, 107, 53, 0.1);
    color: var(--color-accent);
    border-radius: var(--border-radius);
    font-size: var(--fs-xs);
    font-weight: var(--font-weight-medium);
}

.slider__btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--color-secondary);
    color: var(--color-primary);
    box-shadow: var(--shadow);
    cursor: pointer;
    display: none;
    z-index: 10;
}

.slider__btn--prev {
    left: var(--space-md);
}

.slider__btn--next {
    right: var(--space-md);
}

.slider__dots {
    display: flex;
    justify-content: center;
    gap: var(--space-xs);
    margin-top: var(--space-lg);
}

/* ============================================
   FAQ ACCORDION
   ============================================ */
.faq__accordion {
    max-width: 800px;
    margin: 0 auto;
}

.accordion__item {
    border-bottom: 1px solid var(--color-border);
}

.accordion__question {
    width: 100%;
    text-align: left;
    padding: var(--space-lg) 0;
    font-weight: var(--font-weight-semibold);
    font-size: var(--fs-md);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.accordion__question::after {
    content: '+';
    font-size: var(--fs-xl);
    color: var(--color-accent);
    transition: transform var(--transition-normal);
}

.accordion__item.active .accordion__question::after {
    transform: rotate(45deg);
}

.accordion__answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
}

.accordion__answer p {
    padding-bottom: var(--space-lg);
    color: var(--color-gray);
}

/* ============================================
   CONTACT FORM
   ============================================ */
.contact__grid {
    display: grid;
    gap: var(--space-xl);
}

.contact__motivation {
    font-size: var(--fs-md);
    margin-bottom: var(--space-lg);
}

.contact__info li {
    margin-bottom: var(--space-sm);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.contact__form {
    background: var(--color-secondary);
    border-radius: var(--border-radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-lg);
}

.contact__form h3 {
    font-size: var(--fs-lg);
    margin-bottom: var(--space-lg);
    text-align: center;
}

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

.form__group input,
.form__group select,
.form__group textarea {
    width: 100%;
    padding: var(--space-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background-color: var(--color-light-gray);
    transition: border-color var(--transition-fast);
}

.form__group input:focus,
.form__group select:focus,
.form__group textarea:focus {
    border-color: var(--color-accent);
}

.error {
    display: block;
    color: var(--color-error);
    font-size: var(--fs-xs);
    margin-top: var(--space-xs);
    min-height: 1em;
}

.form__note {
    margin-top: var(--space-md);
    font-size: var(--fs-sm);
    color: var(--color-gray);
    text-align: center;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background-color: var(--color-primary);
    color: var(--color-secondary);
    padding: var(--space-2xl) 0 var(--space-lg);
}

.footer__grid {
    display: grid;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.footer__logo {
    font-family: var(--font-heading);
    font-size: var(--fs-xl);
    margin-bottom: var(--space-sm);
    display: inline-block;
}

.footer__logo span {
    color: var(--color-accent);
}

.footer__social {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-md);
}

.footer__social a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--color-secondary);
    transition: background-color var(--transition-fast);
}

.footer__social a:hover {
    background-color: var(--color-accent);
}

.footer__social svg {
    width: 20px;
    height: 20px;
}

.footer__links h4,
.footer__contact h4 {
    font-size: var(--fs-lg);
    margin-bottom: var(--space-md);
    color: var(--color-accent);
}

.footer__links ul li {
    margin-bottom: var(--space-xs);
}

.footer__links a:hover {
    color: var(--color-accent);
}

.footer__contact p {
    margin-bottom: var(--space-xs);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

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

.footer__bottom a {
    color: var(--color-accent);
}

.footer__bottom a:hover {
    text-decoration: underline;
}

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

@keyframes countUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   MEDIA QUERIES (TABLET)
   ============================================ */
@media (min-width: 768px) {
    .section__title {
        font-size: var(--fs-3xl);
    }

    .hero__title {
        font-size: 4rem;
    }

    .about__grid {
        grid-template-columns: 1fr 1fr;
        align-items: center;
    }

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

    .process__timeline {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--space-md);
    }

    .process__timeline::before {
        display: none;
    }

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

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

    .gallery__item:last-child {
        grid-column: span 2;
    }

    .contact__grid {
        grid-template-columns: 1fr 1fr;
        align-items: start;
    }

    .footer__grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .slider__btn {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .testimonial {
        flex: 0 0 calc(50% - var(--space-lg) / 2);
    }
}

/* ============================================
   MEDIA QUERIES (DESKTOP)
   ============================================ */
@media (min-width: 1200px) {
    .nav__list {
        display: flex;
    }

    .nav__toggle {
        display: none;
    }

    .services__grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .transformations__gallery {
        grid-template-columns: repeat(3, 1fr);
    }

    .gallery__item:last-child {
        grid-column: auto;
    }

    .testimonial {
        flex: 0 0 calc(33.333% - var(--space-lg) * 2 / 3);
    }
}

/* ============================================
   ESTADOS ESPECIALES
   ============================================ */
.nav--open .nav__list {
    display: flex;
    position: fixed;
    top: 80px;
    left: 0;
    width: 100%;
    background-color: var(--color-secondary);
    flex-direction: column;
    padding: var(--space-lg);
    box-shadow: var(--shadow);
    z-index: 999;
}

.nav--open .nav__toggle span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.nav--open .nav__toggle span:nth-child(2) {
    opacity: 0;
}

.nav--open .nav__toggle span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

.form__group input.invalid,
.form__group select.invalid {
    border-color: var(--color-error);
}

.form__group input.valid,
.form__group select.valid {
    border-color: var(--color-success);
}