/* ===== VARIABLES CSS ===== */
:root {
    /* Colores - Naranja y Gris como el logo de Mastermin */
    --primary-color: #e67e22;
    --primary-dark: #d35400;
    --primary-light: #f39c12;
    --secondary-color: #7f8c8d;
    --secondary-dark: #5d6d7e;
    --accent-color: #e67e22;
    
    /* Colores de fondo */
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --bg-dark: #2c3e50;
    
    /* Colores de texto */
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --text-light: #bdc3c7;
    --white-color: #ffffff;
    
    /* Tipografía */
    --font-primary: 'Montserrat', sans-serif;
    --font-secondary: 'Roboto', sans-serif;
    
    /* Tamaños de fuente */
    --fs-xs: 0.75rem;
    --fs-sm: 0.875rem;
    --fs-base: 1rem;
    --fs-md: 1.125rem;
    --fs-lg: 1.25rem;
    --fs-xl: 1.5rem;
    --fs-2xl: 2rem;
    --fs-3xl: 2.5rem;
    --fs-4xl: 3rem;
    --fs-5xl: 4rem;
    
    /* Espaciado */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    
    /* Border radius */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 16px;
    --border-radius-xl: 24px;
    --border-radius-full: 50%;
    
    /* Sombras */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 12px 40px rgba(0, 0, 0, 0.2);
    
    /* Transiciones */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Z-index */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal: 400;
    --z-tooltip: 500;
}

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

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

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

ul {
    list-style: none;
}

a {
    text-decoration: none;
    color: inherit;
}

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    outline: none;
}

input,
textarea,
select {
    font-family: inherit;
    font-size: inherit;
}

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

.section__subtitle {
    display: inline-block;
    font-family: var(--font-primary);
    font-size: var(--fs-sm);
    font-weight: 600;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: var(--spacing-sm);
}

.section__title {
    font-family: var(--font-primary);
    font-size: var(--fs-3xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.section__description {
    font-size: var(--fs-md);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.section__header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section__header--light .section__title,
.section__header--light .section__description {
    color: var(--white-color);
}

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

/* ===== BOTONES ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-family: var(--font-primary);
    font-size: var(--fs-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: var(--border-radius-md);
    transition: var(--transition-normal);
    cursor: pointer;
}

.btn--primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--white-color);
    box-shadow: 0 4px 15px rgba(230, 126, 34, 0.4);
}

.btn--primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(230, 126, 34, 0.5);
}

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

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

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

.btn--white:hover {
    background: var(--bg-light);
    transform: translateY(-2px);
}

.btn--whatsapp {
    background: #25d366;
    color: var(--white-color);
}

.btn--whatsapp:hover {
    background: #128c7e;
    transform: translateY(-2px);
}

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

/* ===== HEADER ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: var(--z-fixed);
    background: transparent;
    transition: var(--transition-normal);
}

.header.scroll-header {
    background: var(--white-color);
    box-shadow: var(--shadow-md);
}

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

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

.nav__logo-img {
    height: 50px;
    width: auto;
}

.nav__logo-text {
    display: flex;
    flex-direction: column;
}

.nav__logo-name {
    font-family: var(--font-primary);
    font-size: var(--fs-lg);
    font-weight: 700;
    color: var(--white-color);
    line-height: 1.2;
    transition: var(--transition-normal);
}

.nav__logo-tagline {
    font-size: var(--fs-xs);
    color: var(--primary-light);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.scroll-header .nav__logo-name {
    color: var(--text-primary);
}

.nav__list {
    display: flex;
    gap: var(--spacing-xl);
}

.nav__link {
    font-family: var(--font-primary);
    font-size: var(--fs-sm);
    font-weight: 500;
    color: var(--white-color);
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    padding: var(--spacing-sm) 0;
    transition: var(--transition-normal);
}

.scroll-header .nav__link {
    color: var(--text-primary);
}

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

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

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

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

.nav__cta {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--primary-color);
    color: var(--white-color);
    border-radius: var(--border-radius-md);
    font-family: var(--font-primary);
    font-size: var(--fs-sm);
    font-weight: 600;
    transition: var(--transition-normal);
}

.nav__cta:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.nav__cta--brochure {
    background: var(--secondary-color);
}

.nav__cta--brochure:hover {
    background: #1a252f;
}

.nav__toggle,
.nav__close {
    display: none;
    font-size: var(--fs-xl);
    color: var(--white-color);
    cursor: pointer;
}

.scroll-header .nav__toggle {
    color: var(--text-primary);
}

/* ===== HERO ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--bg-dark) 0%, #1a252f 100%);
    overflow: hidden;
}

.hero__bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('../images/arcotecho_hero.jpeg') center/cover no-repeat;
}

.hero__bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(230, 126, 34, 0.85) 0%, rgba(44, 62, 80, 0.9) 100%);
}

.hero::before {
    display: none;
}

.hero__overlay {
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: linear-gradient(to left, rgba(0,0,0,0.3), transparent);
}

.hero__content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    padding-top: 80px;
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius-xl);
    color: var(--white-color);
    font-size: var(--fs-sm);
    font-weight: 500;
    margin-bottom: var(--spacing-xl);
}

.hero__badge i {
    color: var(--primary-light);
}

.hero__title {
    font-family: var(--font-primary);
    font-size: var(--fs-5xl);
    font-weight: 800;
    color: var(--white-color);
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
}

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

.hero__description {
    font-size: var(--fs-lg);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-2xl);
    max-width: 600px;
}

.hero__buttons {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-3xl);
}

.hero__stats {
    display: flex;
    gap: var(--spacing-3xl);
    padding-top: var(--spacing-2xl);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.hero__stat {
    text-align: center;
}

.hero__stat-number {
    display: block;
    font-family: var(--font-primary);
    font-size: var(--fs-3xl);
    font-weight: 700;
    color: var(--primary-light);
}

.hero__stat-text {
    font-size: var(--fs-sm);
    color: rgba(255, 255, 255, 0.8);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ===== ABOUT ===== */
.about {
    padding: var(--spacing-4xl) 0;
    background: var(--bg-white);
}

.about__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
    align-items: center;
}

.about__text {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.about__text strong {
    color: var(--primary-color);
}

.about__features {
    margin-top: var(--spacing-2xl);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

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

.feature i {
    font-size: var(--fs-2xl);
    color: var(--primary-color);
    background: rgba(230, 126, 34, 0.1);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
}

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

.feature p {
    font-size: var(--fs-sm);
    color: var(--text-secondary);
}

.about__img-container {
    position: relative;
}

.about__img {
    width: 100%;
    height: 500px;
    object-fit: cover;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
}

.about__experience {
    position: absolute;
    bottom: -30px;
    left: -30px;
    background: var(--primary-color);
    color: var(--white-color);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.about__experience-number {
    display: block;
    font-family: var(--font-primary);
    font-size: var(--fs-4xl);
    font-weight: 700;
}

.about__experience-text {
    font-size: var(--fs-sm);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ===== SERVICES ===== */
.services {
    padding: var(--spacing-4xl) 0;
    background: var(--bg-light);
}

.services__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.service-card {
    background: var(--white-color);
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    transform: scaleX(0);
    transition: var(--transition-normal);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card--featured {
    grid-row: span 2;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--white-color);
}

.service-card--featured::before {
    display: none;
}

.service-card--featured .service-card__icon {
    background: rgba(255, 255, 255, 0.2);
    color: var(--white-color);
}

.service-card--featured .service-card__features li {
    color: rgba(255, 255, 255, 0.9);
}

.service-card--featured .service-card__features i {
    color: var(--white-color);
}

.service-card__icon {
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(230, 126, 34, 0.1);
    color: var(--primary-color);
    font-size: var(--fs-2xl);
    border-radius: var(--border-radius-md);
    margin-bottom: var(--spacing-lg);
}

.service-card__title {
    font-family: var(--font-primary);
    font-size: var(--fs-xl);
    margin-bottom: var(--spacing-md);
}

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

.service-card--featured .service-card__description {
    color: rgba(255, 255, 255, 0.9);
}

.service-card__features {
    margin-bottom: var(--spacing-lg);
}

.service-card__features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    font-size: var(--fs-sm);
    color: var(--text-secondary);
}

.service-card__features i {
    color: var(--primary-color);
    font-size: var(--fs-xs);
}

.service-card__link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--primary-color);
    font-weight: 600;
    font-size: var(--fs-sm);
    transition: var(--transition-normal);
}

.service-card__link:hover {
    gap: var(--spacing-md);
}

/* ===== PROJECTS ===== */
.projects {
    padding: var(--spacing-4xl) 0;
    background: var(--bg-white);
}

.projects__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.project-card {
    position: relative;
    height: 300px;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    cursor: pointer;
}

.project-card__image {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-normal);
}

.project-card:hover .project-card__image img {
    transform: scale(1.1);
}

.project-card__image i {
    font-size: 4rem;
    color: rgba(255, 255, 255, 0.3);
}

.project-card__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(230, 126, 34, 0.95), transparent 70%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: var(--spacing-xl);
    color: var(--white-color);
    transform: translateY(30%);
    opacity: 0;
    transition: var(--transition-normal);
}

.project-card:hover .project-card__overlay {
    transform: translateY(0);
    opacity: 1;
}

.project-card__overlay h3 {
    font-family: var(--font-primary);
    font-size: var(--fs-lg);
    margin-bottom: var(--spacing-xs);
}

.project-card__overlay p {
    font-size: var(--fs-sm);
    opacity: 0.9;
    margin-bottom: var(--spacing-sm);
}

.project-card__category {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius-sm);
    font-size: var(--fs-xs);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ===== PROCESS ===== */
.process {
    padding: var(--spacing-4xl) 0;
    background: linear-gradient(135deg, var(--bg-dark), #1a252f);
}

.process__steps {
    display: flex;
    justify-content: space-between;
    position: relative;
}

.process__steps::before {
    content: '';
    position: absolute;
    top: 40px;
    left: 10%;
    right: 10%;
    height: 2px;
    background: rgba(255, 255, 255, 0.2);
}

.process__step {
    text-align: center;
    position: relative;
    z-index: 1;
    flex: 1;
}

.process__number {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-color);
    color: var(--white-color);
    font-family: var(--font-primary);
    font-size: var(--fs-xl);
    font-weight: 700;
    border-radius: var(--border-radius-full);
    margin: 0 auto var(--spacing-lg);
    box-shadow: 0 0 0 8px rgba(230, 126, 34, 0.2);
}

.process__content h3 {
    font-family: var(--font-primary);
    font-size: var(--fs-md);
    color: var(--white-color);
    margin-bottom: var(--spacing-sm);
}

.process__content p {
    font-size: var(--fs-sm);
    color: rgba(255, 255, 255, 0.7);
    max-width: 180px;
    margin: 0 auto;
}

/* ===== ADVANTAGES ===== */
.advantages {
    padding: var(--spacing-4xl) 0;
    background: var(--bg-light);
}

.advantages__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.advantage-card {
    text-align: center;
    padding: var(--spacing-2xl);
    background: var(--white-color);
    border-radius: var(--border-radius-lg);
    transition: var(--transition-normal);
}

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

.advantage-card i {
    font-size: var(--fs-3xl);
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
}

.advantage-card h3 {
    font-family: var(--font-primary);
    font-size: var(--fs-lg);
    margin-bottom: var(--spacing-md);
}

.advantage-card p {
    color: var(--text-secondary);
    font-size: var(--fs-sm);
}

/* ===== CONTACT ===== */
.contact {
    padding: var(--spacing-4xl) 0;
    background: var(--bg-white);
}

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

.contact__info {
    background: linear-gradient(135deg, var(--bg-dark), #1a252f);
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-lg);
    color: var(--white-color);
}

.contact__info-header {
    margin-bottom: var(--spacing-xl);
}

.contact__logo {
    height: 60px;
    width: auto;
}

.contact__info h3 {
    font-family: var(--font-primary);
    font-size: var(--fs-xl);
    margin-bottom: var(--spacing-md);
}

.contact__info > p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.7;
}

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

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

.contact__item i {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-color);
    color: var(--white-color);
    border-radius: var(--border-radius-md);
    font-size: var(--fs-md);
    flex-shrink: 0;
}

.contact__item h4 {
    font-size: var(--fs-sm);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--primary-light);
}

.contact__item p {
    font-size: var(--fs-sm);
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.5;
}

.contact__form-container {
    background: var(--bg-light);
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-lg);
}

.contact__form h3 {
    font-family: var(--font-primary);
    font-size: var(--fs-xl);
    margin-bottom: var(--spacing-xl);
    color: var(--text-primary);
}

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

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

.form__group label {
    display: block;
    font-size: var(--fs-sm);
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.form__group input,
.form__group select,
.form__group textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid #e0e0e0;
    border-radius: var(--border-radius-md);
    background: var(--white-color);
    transition: var(--transition-normal);
}

.form__group input:focus,
.form__group select:focus,
.form__group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(230, 126, 34, 0.1);
}

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

/* ===== CTA ===== */
.cta {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
}

.cta__content {
    text-align: center;
    color: var(--white-color);
}

.cta__content h2 {
    font-family: var(--font-primary);
    font-size: var(--fs-3xl);
    margin-bottom: var(--spacing-md);
}

.cta__content p {
    font-size: var(--fs-lg);
    opacity: 0.9;
    margin-bottom: var(--spacing-xl);
}

.cta__buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
}

/* ===== FOOTER ===== */
.footer {
    background: var(--bg-dark);
    color: var(--white-color);
    padding: var(--spacing-4xl) 0 var(--spacing-xl);
}

.footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: var(--spacing-2xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__logo-img {
    height: 50px;
    width: auto;
    margin-bottom: var(--spacing-lg);
}

.footer__brand p {
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--fs-sm);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.footer__ruc {
    color: var(--primary-light);
    font-size: var(--fs-sm);
}

.footer__links h4,
.footer__contact h4 {
    font-family: var(--font-primary);
    font-size: var(--fs-md);
    margin-bottom: var(--spacing-lg);
    color: var(--white-color);
}

.footer__links ul li {
    margin-bottom: var(--spacing-sm);
}

.footer__links ul li a {
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--fs-sm);
    transition: var(--transition-normal);
}

.footer__links ul li a:hover {
    color: var(--primary-color);
    padding-left: var(--spacing-sm);
}

.footer__contact ul li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--fs-sm);
}

.footer__contact ul li i {
    color: var(--primary-color);
    margin-top: 3px;
}

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

.footer__social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    color: var(--white-color);
    border-radius: var(--border-radius-md);
    font-size: var(--fs-md);
    transition: var(--transition-normal);
}

.footer__social a:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.footer__bottom {
    text-align: center;
    padding-top: var(--spacing-xl);
}

.footer__bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: var(--fs-sm);
}

/* ===== WHATSAPP FLOAT ===== */
.whatsapp-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #25d366;
    color: var(--white-color);
    font-size: var(--fs-2xl);
    border-radius: var(--border-radius-full);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-fixed);
    transition: var(--transition-normal);
    animation: pulse 2s infinite;
}

.whatsapp-float:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-xl);
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.4);
    }
    70% {
        box-shadow: 0 0 0 15px rgba(37, 211, 102, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(37, 211, 102, 0);
    }
}

/* ===== RESPONSIVE ===== */
@media screen and (max-width: 1024px) {
    .services__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .service-card--featured {
        grid-row: span 1;
    }
    
    .projects__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .process__steps {
        flex-wrap: wrap;
        gap: var(--spacing-2xl);
    }
    
    .process__steps::before {
        display: none;
    }
    
    .process__step {
        flex: 0 0 calc(33.333% - var(--spacing-xl));
    }
    
    .footer__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media screen and (max-width: 768px) {
    :root {
        --fs-5xl: 2.5rem;
        --fs-4xl: 2rem;
        --fs-3xl: 1.75rem;
    }
    
    .nav__menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        height: 100vh;
        background: var(--white-color);
        box-shadow: var(--shadow-xl);
        padding: var(--spacing-4xl) var(--spacing-xl);
        transition: var(--transition-normal);
        z-index: var(--z-fixed);
    }
    
    .nav__menu.show-menu {
        right: 0;
    }
    
    .nav__list {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
    
    .nav__link {
        color: var(--text-primary);
        font-size: var(--fs-lg);
    }
    
    .nav__close {
        display: block;
        position: absolute;
        top: var(--spacing-lg);
        right: var(--spacing-lg);
        color: var(--text-primary);
    }
    
    .nav__toggle {
        display: block;
    }
    
    .nav__cta span {
        display: none;
    }
    
    .hero__buttons {
        flex-direction: column;
    }
    
    .hero__stats {
        flex-direction: column;
        gap: var(--spacing-lg);
        align-items: flex-start;
    }
    
    .about__grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .about__image {
        order: -1;
    }
    
    .about__img {
        height: 350px;
    }
    
    .about__experience {
        bottom: -20px;
        left: 20px;
        padding: var(--spacing-lg);
    }
    
    .about__experience-number {
        font-size: var(--fs-2xl);
    }
    
    .services__grid {
        grid-template-columns: 1fr;
    }
    
    .projects__grid {
        grid-template-columns: 1fr;
    }
    
    .process__step {
        flex: 0 0 100%;
    }
    
    .advantages__grid {
        grid-template-columns: 1fr;
    }
    
    .contact__grid {
        grid-template-columns: 1fr;
    }
    
    .form__row {
        grid-template-columns: 1fr;
    }
    
    .cta__buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .footer__grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer__social {
        justify-content: center;
    }
    
    .footer__contact ul li {
        justify-content: center;
    }
}

@media screen and (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .hero__title {
        font-size: var(--fs-3xl);
    }
    
    .btn {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: var(--fs-xs);
    }
    
    .whatsapp-float {
        bottom: 20px;
        right: 20px;
        width: 50px;
        height: 50px;
        font-size: var(--fs-xl);
    }
}