/* 
 * BJ Security Fencing Wire - Main Stylesheet
 * Industrial Design Theme with Modern UI
 * Color Palette: Primary Blue #0B5FFF, Deep Navy #071126, Metallic Silver #BFC7CF, White #FFFFFF, Light Gray #F5F7FA
 */

/* CSS Custom Properties (Variables) */
:root {
    /* Colors */
    --primary-blue: #0B5FFF;
    --deep-navy: #071126;
    --metallic-silver: #BFC7CF;
    --white: #FFFFFF;
    --light-gray: #F5F7FA;
    --dark-gray: #2D3748;
    --medium-gray: #4A5568;
    --border-color: #E2E8F0;
    --success-color: #38A169;
    --error-color: #E53E3E;
    --warning-color: #D69E2E;
    
    /* Typography */
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* Spacing */
    --container-max-width: 1200px;
    --section-padding: 5rem 0;
    --section-padding-mobile: 3rem 0;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --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);
    
    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
}

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

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

body {
    font-family: var(--font-body);
    line-height: 1.6;
    color: var(--dark-gray);
    background-color: var(--white);
    overflow-x: hidden;
}

/* Accessibility - Skip Link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--primary-blue);
    color: var(--white);
    padding: 8px;
    text-decoration: none;
    border-radius: var(--radius-sm);
    z-index: 1000;
    transition: var(--transition-fast);
}

.skip-link:focus {
    top: 6px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--deep-navy);
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1.125rem; }

p {
    margin-bottom: 1rem;
    color: var(--medium-gray);
}

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

a:hover {
    color: var(--deep-navy);
}

/* Container */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 1rem;
}

@media (min-width: 640px) {
    .container {
        padding: 0 2rem;
    }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn--primary {
    background: linear-gradient(135deg, var(--primary-blue), #0052CC);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: var(--white);
}

.btn--primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--transition-slow);
}

.btn--primary:hover::before {
    left: 100%;
}

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

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

.btn--large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

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

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition-normal);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-md);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
}

.nav__brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav__logo {
    width: 40px;
    height: 40px;
}

.nav__brand-text {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--deep-navy);
}

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

.nav__list {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav__link {
    font-weight: 500;
    color: var(--medium-gray);
    transition: var(--transition-fast);
    position: relative;
}

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

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -0.5rem;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-blue);
    transition: var(--transition-fast);
}

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

.nav__actions {
    display: flex;
    gap: 1rem;
}

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
    padding: 0.5rem;
}

.nav__toggle-line {
    width: 25px;
    height: 3px;
    background: var(--deep-navy);
    transition: var(--transition-fast);
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero__background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.hero__video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: none;
}

.hero__overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
  135deg,
  rgba(7, 17, 38, 0.95) 0%,
  rgba(21, 102, 252, 0.6) 45%,
  rgba(22, 108, 194, 0.913) 100%
);
}

.hero__content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--white);
    max-width: 800px;
}

.hero__title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.hero__title-highlight {
    color: var(--metallic-silver);
    display: block;
}

.hero__subtitle {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    opacity: 0.9;
    line-height: 1.6;
}

.hero__actions {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.hero__scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--white);
    opacity: 0.8;
    animation: bounce 2s infinite;
}

.hero__scroll-text {
    font-size: 0.875rem;
    font-weight: 500;
}

.hero__scroll-arrow {
    width: 2px;
    height: 30px;
    background: var(--white);
    position: relative;
}

.hero__scroll-arrow::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: -3px;
    width: 8px;
    height: 8px;
    border-right: 2px solid var(--white);
    border-bottom: 2px solid var(--white);
    transform: rotate(45deg);
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* Sections */
.section {
    padding: var(--section-padding);
}

.section__header {
    text-align: center;
    margin-bottom: 4rem;
}

.section__title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.section__subtitle {
    font-size: 1.125rem;
    color: var(--medium-gray);
    max-width: 600px;
    margin: 0 auto;
}

/* Why Us Section */
.why-us__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.why-us__card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: var(--transition-normal);
    border: 1px solid var(--border-color);
}

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

.why-us__icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, var(--primary-blue), #0052CC);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
}

.why-us__title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--deep-navy);
}

.why-us__description {
    color: var(--medium-gray);
    line-height: 1.6;
}

/* Services Section */
.services {
    background: var(--light-gray);
}

.services__slider {
    position: relative;
    overflow: hidden;
}

.services__track {
    display: flex;
    transition: var(--transition-normal);
    gap: 2rem;
}

.services__card {
    flex: 0 0 350px;
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
}

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

.services__image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.services__content {
    padding: 2rem;
}

.services__title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--deep-navy);
}

.services__description {
    color: var(--medium-gray);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.services__specs {
    margin-bottom: 1.5rem;
}

.services__spec {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
}

.services__spec-label {
    color: var(--medium-gray);
}

.services__spec-value {
    font-weight: 600;
    color: var(--deep-navy);
}

.services__price {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 1.5rem;
}

.services__actions {
    display: flex;
    gap: 1rem;
}

.services__btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    background: var(--white);
    border: 2px solid var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-normal);
    z-index: 10;
}

.services__btn:hover {
    background: var(--primary-blue);
    color: var(--white);
}

.services__btn--prev {
    left: -25px;
}

.services__btn--next {
    right: -25px;
}

/* Projects Section */
.projects__filters {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.projects__filter {
    padding: 0.75rem 1.5rem;
    background: var(--white);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
}

.projects__filter:hover,
.projects__filter.active {
    background: var(--primary-blue);
    color: var(--white);
    border-color: var(--primary-blue);
}

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

.projects__item {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    cursor: pointer;
}

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

.projects__image {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.projects__content {
    padding: 1.5rem;
}

.projects__category {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--primary-blue);
    color: var(--white);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
}

.projects__title {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--deep-navy);
}

.projects__description {
    color: var(--medium-gray);
    font-size: 0.875rem;
    line-height: 1.5;
}

/* Testimonials Section */
.testimonials {
    background: var(--light-gray);
}

.testimonials__slider {
    position: relative;
    overflow: hidden;
}

.testimonials__track {
    display: flex;
    transition: var(--transition-normal);
    gap: 2rem;
}

.testimonials__card {
    flex: 0 0 400px;
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
}

.testimonials__stars {
    display: flex;
    justify-content: center;
    gap: 0.25rem;
    margin-bottom: 1.5rem;
}

.testimonials__star {
    color: #FCD34D;
    font-size: 1.25rem;
}

.testimonials__quote {
    font-size: 1.125rem;
    font-style: italic;
    color: var(--medium-gray);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.testimonials__author {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

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

.testimonials__author-info h4 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
    color: var(--deep-navy);
}

.testimonials__author-info p {
    font-size: 0.875rem;
    color: var(--medium-gray);
    margin: 0;
}

.testimonials__btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    background: var(--white);
    border: 2px solid var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-normal);
    z-index: 10;
}

.testimonials__btn:hover {
    background: var(--primary-blue);
    color: var(--white);
}

.testimonials__btn--prev {
    left: -25px;
}

.testimonials__btn--next {
    right: -25px;
}

/* Contact Section */
.contact__content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact__title {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--deep-navy);
}

.contact__description {
    font-size: 1.125rem;
    color: var(--medium-gray);
    margin-bottom: 2rem;
}

.contact__details {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact__item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.contact__icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-blue), #0052CC);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    flex-shrink: 0;
}

.contact__text h4 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
    color: var(--deep-navy);
}

.contact__text p {
    margin-bottom: 0.25rem;
}

.contact__text a {
    color: var(--primary-blue);
    font-weight: 500;
}

/* Forms */
.form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form__group {
    display: flex;
    flex-direction: column;
}

.form__label {
    font-weight: 600;
    color: var(--deep-navy);
    margin-bottom: 0.5rem;
}

.form__input,
.form__select,
.form__textarea {
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.form__input:focus,
.form__select:focus,
.form__textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(11, 95, 255, 0.1);
}

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

.form__file {
    padding: 0.5rem;
}

.form__file-info {
    font-size: 0.875rem;
    color: var(--medium-gray);
    margin-top: 0.25rem;
}

/* Footer */
.footer {
    background: var(--deep-navy);
    color: var(--white);
    padding: 4rem 0 2rem;
}

.footer__content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

.footer__brand {
    max-width: 300px;
}

.footer__logo {
    width: 50px;
    height: 50px;
    margin-bottom: 1rem;
}

.footer__brand-name {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--white);
}

.footer__description {
    color: var(--metallic-silver);
    line-height: 1.6;
}

.footer__links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.footer__title {
    font-size: 1.125rem;
    margin-bottom: 1rem;
    color: var(--white);
}

.footer__list {
    list-style: none;
}

.footer__list li {
    margin-bottom: 0.5rem;
}

.footer__link {
    color: var(--metallic-silver);
    transition: var(--transition-fast);
}

.footer__link:hover {
    color: var(--white);
}

.footer__contact p {
    margin-bottom: 0.5rem;
}

.footer__contact a {
    color: var(--metallic-silver);
    transition: var(--transition-fast);
}

.footer__contact a:hover {
    color: var(--white);
}

.footer__bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(191, 199, 207, 0.2);
}

.footer__trust {
    display: flex;
    gap: 1rem;
}

.footer__badge {
    padding: 0.5rem 1rem;
    background: rgba(11, 95, 255, 0.2);
    border: 1px solid var(--primary-blue);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--metallic-silver);
}

.footer__copyright {
    color: var(--metallic-silver);
    font-size: 0.875rem;
}

/* Modals */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal.active {
    display: flex;
}

.modal__overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
}

.modal__content {
    position: relative;
    background: var(--white);
    border-radius: var(--radius-lg);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
}

.modal__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 2rem 1rem;
    border-bottom: 1px solid var(--border-color);
}

.modal__title {
    font-size: 1.5rem;
    margin: 0;
    color: var(--deep-navy);
}

.modal__close {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.modal__close:hover {
    background: var(--light-gray);
}

.modal .form {
    padding: 2rem;
}

/* Lightbox */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.lightbox.active {
    display: flex;
}

.lightbox__overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
}

.lightbox__content {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.lightbox__close {
    position: absolute;
    top: -50px;
    right: 0;
    background: none;
    border: none;
    color: var(--white);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.lightbox__close:hover {
    background: rgba(255, 255, 255, 0.2);
}

.lightbox__image-container {
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.lightbox__image {
    width: 100%;
    height: auto;
    max-height: 70vh;
    object-fit: contain;
}

.lightbox__info {
    background: var(--white);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    text-align: center;
}

.lightbox__title {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--deep-navy);
}

.lightbox__description {
    color: var(--medium-gray);
    line-height: 1.6;
}

/* WhatsApp Float */
.whatsapp-float {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 1000;
}

.whatsapp-float__button {
    width: 60px;
    height: 60px;
    background: #25D366;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    transition: var(--transition-normal);
    color: var(--white);
}

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

.whatsapp-float__menu {
    position: absolute;
    bottom: 80px;
    right: 0;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: 1rem;
    min-width: 200px;
    display: none;
    flex-direction: column;
    gap: 0.5rem;
}

.whatsapp-float__menu.active {
    display: flex;
}

.whatsapp-float__item {
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-fast);
    font-weight: 500;
    color: var(--dark-gray);
}

.whatsapp-float__item:hover {
    background: var(--light-gray);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero__title {
        font-size: 3rem;
    }
    
    .section__title {
        font-size: 2rem;
    }
    
    .contact__content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .footer__content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .footer__links {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav__menu {
        position: fixed;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        padding: 2rem;
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition-normal);
    }
    
    .nav__menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav__list {
        flex-direction: column;
        gap: 1rem;
        margin-bottom: 2rem;
    }
    
    .nav__actions {
        flex-direction: column;
        width: 100%;
    }
    
    .nav__toggle {
        display: flex;
    }
    
    .nav__toggle.active .nav__toggle-line:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .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, -6px);
    }
    
    .hero__title {
        font-size: 2.5rem;
    }
    
    .hero__subtitle {
        font-size: 1.125rem;
    }
    
    .hero__actions {
        flex-direction: column;
        align-items: center;
    }
    
    .hero__video {
        display: none;
    }
    
    .hero__image {
        display: block;
    }
    
    .section {
        padding: var(--section-padding-mobile);
    }
    
    .section__title {
        font-size: 1.75rem;
    }
    
    .why-us__grid {
        grid-template-columns: 1fr;
    }
    
    .services__card {
        flex: 0 0 300px;
    }
    
    .services__btn--prev {
        left: 10px;
    }
    
    .services__btn--next {
        right: 10px;
    }
    
    .projects__grid {
        grid-template-columns: 1fr;
    }
    
    .testimonials__card {
        flex: 0 0 350px;
    }
    
    .testimonials__btn--prev {
        left: 10px;
    }
    
    .testimonials__btn--next {
        right: 10px;
    }
    
    .footer__links {
        grid-template-columns: 1fr;
    }
    
    .footer__bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .footer__trust {
        justify-content: center;
    }
    
    .whatsapp-float {
        bottom: 1rem;
        right: 1rem;
    }
    
    .whatsapp-float__button {
        width: 50px;
        height: 50px;
    }
    
    .whatsapp-float__menu {
        bottom: 70px;
        right: -50px;
        min-width: 180px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .hero__title {
        font-size: 2rem;
    }
    
    .hero__subtitle {
        font-size: 1rem;
    }
    
    .btn {
        padding: 0.625rem 1.25rem;
        font-size: 0.875rem;
    }
    
    .btn--large {
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
    }
    
    .modal__content {
        margin: 1rem;
        max-height: calc(100vh - 2rem);
    }
    
    .modal__header {
        padding: 1.5rem 1.5rem 1rem;
    }
    
    .modal .form {
        padding: 1.5rem;
    }
    
    .lightbox__content {
        max-width: 95vw;
        max-height: 95vh;
    }
    
    .lightbox__info {
        padding: 1rem;
    }
}

/* Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: var(--transition-slow);
}

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

.slide-in-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: var(--transition-slow);
}

.slide-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.slide-in-right {
    opacity: 0;
    transform: translateX(50px);
    transition: var(--transition-slow);
}

.slide-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* Loading States */
.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.hidden { display: none; }
.visible { display: block; }

/* Print Styles */
@media print {
    .header,
    .whatsapp-float,
    .modal,
    .lightbox {
        display: none !important;
    }
    
    .hero {
        height: auto;
        padding: 2rem 0;
    }
    
    .hero__background {
        display: none;
    }
    
    .hero__content {
        position: static;
        color: var(--dark-gray);
    }
    
    .section {
        padding: 1rem 0;
    }
    
    .btn {
        border: 1px solid var(--dark-gray);
        background: transparent;
        color: var(--dark-gray);
    }
}