/* ========================================
   ANA ROVINA STUDIO - LANDING PAGE
   Estilo: Minimalista, Técnico, Elegante
   Paleta: Preto, Branco, Verde Pantone 3275 U
   ======================================== */

/* === VARIÁVEIS CSS === */
:root {
    /* Cores principais */
    --color-primary: #024d7a;        /* Azul personalizado */
    --color-black: #000000;
    --color-white: #FFFFFF;
    --color-gray-100: #F5F5F5;
    --color-gray-200: #E5E5E5;
    --color-gray-300: #D4D4D4;
    --color-gray-400: #A3A3A3;
    --color-gray-500: #737373;
    --color-gray-600: #525252;
    --color-gray-700: #404040;
    --color-gray-800: #262626;
    --color-gray-900: #171717;

    /* Tipografia */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Espaçamento */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --spacing-xxl: 8rem;

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

    /* Bordas */
    --border-radius: 2px;
    --border-width: 1px;
}

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

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

body {
    font-family: var(--font-primary);
    font-weight: var(--font-weight-regular);
    color: var(--color-black);
    background-color: var(--color-white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* === TIPOGRAFIA === */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-semibold);
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 5vw, 4.5rem); }
h2 { font-size: clamp(2rem, 4vw, 3.5rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: 1.25rem; }

p {
    line-height: 1.8;
    color: var(--color-gray-600);
}

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

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

/* === NAVIGATION === */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    border-bottom: var(--border-width) solid var(--color-gray-200);
    z-index: 1000;
    transition: var(--transition-normal);
}

.nav.scrolled {
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
}

.logo {
    font-size: 1rem;
    font-weight: var(--font-weight-bold);
    letter-spacing: 0.05em;
    color: var(--color-black);
    display: flex;
    align-items: center;
}

.logo-image {
    height: 100px;
    width: auto;
    object-fit: contain;
}

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

.nav-link {
    font-size: 0.9rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-600);
    padding: var(--spacing-xs) var(--spacing-sm);
    transition: var(--transition-fast);
    letter-spacing: 0.02em;
}

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

.nav-link-cta {
    color: var(--color-primary);
    border: var(--border-width) solid var(--color-primary);
    border-radius: var(--border-radius);
    padding: var(--spacing-xs) var(--spacing-md);
}

.nav-link-cta:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.search-icon {
    background: none;
    border: none;
    color: var(--color-gray-600);
    cursor: pointer;
    padding: var(--spacing-xs);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

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

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    z-index: 1001;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--color-black);
    transition: var(--transition-fast);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

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

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('public/images/capa.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: -1;
}

.hero-background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.45);
}

.hero-container {
    text-align: center;
    z-index: 1;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
}

.hero-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: var(--font-weight-bold);
    letter-spacing: 0.15em;
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-xs) var(--spacing-sm);
    border: var(--border-width) solid var(--color-gray-300);
    border-radius: var(--border-radius);
}

.hero-title {
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
    animation: fadeInUp 0.8s ease;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-white);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
    animation: fadeInUp 0.8s ease 0.2s both;
}

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

.hero-scroll-indicator {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    animation: fadeIn 1s ease 0.5s both;
}

.hero-scroll-indicator span {
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    color: var(--color-gray-400);
}

.scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-gray-300), transparent);
    animation: scrollDown 2s ease infinite;
}

/* === BUTTONS === */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 0.95rem;
    font-weight: var(--font-weight-medium);
    letter-spacing: 0.02em;
    border: var(--border-width) solid transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-align: center;
}

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

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

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

.btn-secondary:hover {
    background-color: #013a5c;
    color: var(--color-white);
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
}

/* === SECTIONS === */
section {
    padding: var(--spacing-xxl) 0;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
}

.section-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: var(--font-weight-bold);
    letter-spacing: 0.15em;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.section-title {
    margin-bottom: var(--spacing-md);
    color: var(--color-black);
}

.section-title-primary {
    color: var(--color-primary);
}

.section-description {
    font-size: 1.1rem;
    color: var(--color-gray-600);
    line-height: 1.8;
}

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

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

.services-grid-two {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    max-width: 1200px;
    margin: 0 auto;
}

.service-card {
    padding: var(--spacing-lg);
    border: var(--border-width) solid var(--color-gray-200);
    border-radius: var(--border-radius);
    transition: all var(--transition-normal);
}

.service-card-detailed {
    padding: var(--spacing-xl);
    display: block;
}

.service-card-with-image {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: var(--spacing-xl);
    align-items: stretch;
}

.service-card-reverse {
    grid-template-columns: 400px 1fr;
}

.service-content {
    display: flex;
    flex-direction: column;
}

.service-image-placeholder {
    background: var(--color-gray-100);
    border-radius: var(--border-radius);
    min-height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.service-image-placeholder .service-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.service-image-placeholder::after {
    content: 'Espaço para Imagem';
    color: var(--color-gray-400);
    font-size: 0.9rem;
    font-weight: var(--font-weight-medium);
    letter-spacing: 0.05em;
}

.service-image-placeholder:has(.service-image)::after {
    content: none;
}

.service-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
}

.service-icon {
    font-size: 2rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.service-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.service-description {
    flex-grow: 0;
}

.service-deliverables,
.service-target {
    margin-top: var(--spacing-lg);
}

.service-deliverables {
    flex-grow: 0;
}

.service-deliverables h4,
.service-target h4 {
    font-size: 0.9rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.service-deliverables ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.service-deliverables li {
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-md);
    position: relative;
    font-size: 0.95rem;
    line-height: 1.6;
}

.service-deliverables li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-primary);
}

.service-target p {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--color-gray-600);
}

.service-description {
    font-size: 0.95rem;
    color: var(--color-gray-600);
    line-height: 1.7;
}

/* === SPECIALTY SECTIONS === */
.specialty-section {
    background-color: var(--color-gray-100);
}

.specialty-section-alt {
    background-color: var(--color-white);
}

.produto-digital-bg {
    background-image: linear-gradient(rgba(0, 0, 0, 0.75), rgba(0, 0, 0, 0.75)), url('public/images/foto2_ia.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.produto-digital-bg .section-tag,
.produto-digital-bg .section-title,
.produto-digital-bg .specialty-description,
.produto-digital-bg .timeline-content,
.produto-digital-bg .timeline-content strong,
.produto-digital-bg .timeline-content span {
    color: var(--color-white);
}

.produto-digital-bg .timeline-icon {
    background-color: rgba(255, 255, 255, 0.2);
    color: var(--color-white);
}

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

.specialty-content-reverse {
    direction: rtl;
}

.specialty-content-reverse > * {
    direction: ltr;
}

.specialty-content-full {
    max-width: 100%;
}

.specialty-text-center {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.specialty-text {
    max-width: 550px;
}

.specialty-description {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.specialty-list {
    list-style: none;
    margin-bottom: var(--spacing-lg);
}

.specialty-list li {
    padding: var(--spacing-md) 0;
    border-bottom: var(--border-width) solid var(--color-gray-200);
}

.specialty-list li:first-child {
    border-top: var(--border-width) solid var(--color-gray-200);
}

.specialty-list strong {
    display: block;
    font-weight: var(--font-weight-semibold);
    color: var(--color-black);
    margin-bottom: var(--spacing-xs);
}

.specialty-list span {
    font-size: 0.9rem;
    color: var(--color-gray-600);
}

/* === TIMELINE HORIZONTAL === */
.timeline-horizontal {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md) 0;
}

.timeline-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    min-width: 200px;
    flex: 1;
    position: relative;
}

.timeline-item:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 32px;
    left: calc(100% + var(--spacing-sm));
    width: calc(var(--spacing-lg) - var(--spacing-sm) * 2);
    height: 2px;
    background: var(--color-gray-300);
}

.timeline-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background-color: var(--color-white);
    border: 2px solid var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
    transition: all var(--transition-normal);
}

.timeline-item:hover .timeline-icon {
    background-color: var(--color-primary);
    color: var(--color-white);
    transform: scale(1.1);
}

.timeline-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.timeline-content strong {
    font-weight: var(--font-weight-semibold);
    color: var(--color-black);
    font-size: 1rem;
}

.timeline-content span {
    font-size: 0.85rem;
    color: var(--color-gray-600);
    line-height: 1.5;
}

.specialty-visual {
    position: relative;
}

.specialty-placeholder {
    aspect-ratio: 4/3;
    background-color: var(--color-white);
    border: var(--border-width) solid var(--color-gray-200);
    border-radius: var(--border-radius);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.specialty-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.placeholder-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1px;
    height: 100%;
    background-color: var(--color-gray-200);
}

.placeholder-item {
    background-color: var(--color-gray-100);
}

.placeholder-interface {
    display: grid;
    grid-template-columns: 60px 1fr;
    grid-template-rows: 50px 1fr;
    gap: 1px;
    height: 100%;
    background-color: var(--color-gray-200);
}

.interface-header {
    grid-column: 1 / -1;
    background-color: var(--color-gray-100);
}

.interface-sidebar {
    background-color: var(--color-gray-100);
}

.interface-content {
    background-color: var(--color-white);
}

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

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-md);
}

.portfolio-item {
    cursor: pointer;
    transition: var(--transition-normal);
}

.portfolio-item:hover {
    transform: translateY(-8px);
}

.portfolio-item:hover .portfolio-placeholder {
    border-color: var(--color-primary);
}

.portfolio-image {
    margin-bottom: var(--spacing-md);
    position: relative;
    overflow: hidden;
}

.portfolio-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    aspect-ratio: 16/10;
    border-radius: var(--border-radius);
    transition: var(--transition-normal);
}

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

.portfolio-placeholder {
    aspect-ratio: 16/10;
    background-color: var(--color-gray-100);
    border: var(--border-width) solid var(--color-gray-200);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-gray-300);
    letter-spacing: 0.1em;
    transition: var(--transition-normal);
}

.portfolio-info {
    padding: 0 var(--spacing-xs);
}

.portfolio-title {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-black);
}

.portfolio-category {
    font-size: 0.85rem;
    color: var(--color-gray-500);
    letter-spacing: 0.02em;
    display: block;
    margin-bottom: var(--spacing-xs);
}

.portfolio-services {
    font-size: 0.8rem;
    color: var(--color-gray-400);
    line-height: 1.6;
    margin-top: var(--spacing-xs);
    font-weight: var(--font-weight-normal);
}

/* === TESTIMONIALS SECTION === */
.testimonials {
    background-color: var(--color-gray-100);
}

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

.testimonial-card {
    background-color: var(--color-white);
    padding: var(--spacing-lg);
    border: var(--border-width) solid var(--color-gray-200);
    border-radius: var(--border-radius);
}

.testimonial-text {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-md);
}

.testimonial-author strong {
    display: block;
    font-weight: var(--font-weight-semibold);
    color: var(--color-black);
    margin-bottom: 4px;
}

.testimonial-author span {
    font-size: 0.9rem;
    color: var(--color-gray-500);
}

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

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.contact-description {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.contact-image-placeholder {
    background: var(--color-gray-100);
    border-radius: var(--border-radius);
    flex-grow: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    margin-top: var(--spacing-md);
    min-height: 300px;
    overflow: hidden;
}

.contact-image-placeholder .contact-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.contact-image-placeholder::after {
    content: 'Espaço para Imagem';
    color: var(--color-gray-400);
    font-size: 0.9rem;
    font-weight: var(--font-weight-medium);
}

.contact-image-placeholder:has(.contact-image)::after {
    content: none;
}

.contact-title {
    color: var(--color-primary);
}

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

.contact-detail-item strong {
    display: block;
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-500);
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: var(--spacing-xs);
}

.contact-detail-item a {
    color: var(--color-black);
    font-size: 1.1rem;
}

.contact-detail-item a:hover {
    color: var(--color-primary);
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    font-size: 0.95rem;
    color: var(--color-gray-600);
    padding-bottom: 4px;
    border-bottom: var(--border-width) solid transparent;
}

.social-link:hover {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

/* === CONTACT FORM === */
.contact-form-wrapper {
    background-color: var(--color-gray-100);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
}

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

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-group label {
    font-size: 0.9rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-700);
    letter-spacing: 0.02em;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: var(--spacing-sm);
    font-family: var(--font-primary);
    font-size: 0.95rem;
    color: var(--color-black);
    background-color: var(--color-white);
    border: var(--border-width) solid var(--color-gray-300);
    border-radius: var(--border-radius);
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

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

.form-message {
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    text-align: center;
    font-weight: var(--font-weight-medium);
}

.form-message.success {
    background-color: rgba(0, 167, 142, 0.1);
    color: var(--color-primary);
    border: var(--border-width) solid var(--color-primary);
}

.form-message.error {
    background-color: rgba(239, 68, 68, 0.1);
    color: #dc2626;
    border: var(--border-width) solid #dc2626;
}

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

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

.footer-brand {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.footer-brand h3 {
    font-size: 1rem;
    font-weight: var(--font-weight-bold);
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-xs);
}

.footer-logo {
    height: 80px;
    width: auto;
    object-fit: contain;
    margin-bottom: 4px;
    margin-top: 40px;
}

.footer-brand p {
    font-size: 0.85rem;
    color: var(--color-white);
}

.footer-legal p {
    font-size: 0.85rem;
    color: var(--color-white);
}

.footer-contact {
    color: var(--color-white);
}

.footer-contact a {
    color: var(--color-white);
    text-decoration: none;
    transition: opacity 0.3s ease;
    font-size: 0.9rem;
}

.footer-contact a:hover {
    opacity: 0.8;
}

.footer-contact strong {
    color: var(--color-white);
}

.footer-brand .social-links {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: 2px;
}

.footer-brand .social-link {
    color: var(--color-white);
    text-decoration: none;
    font-size: 0.75rem;
    transition: opacity 0.3s ease;
}

.footer-brand .social-link:hover {
    opacity: 0.8;
}

/* === ANIMATIONS === */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

@keyframes scrollDown {
    0%, 100% {
        opacity: 1;
        transform: translateY(0);
    }
    50% {
        opacity: 0.5;
        transform: translateY(20px);
    }
}

.fade-in {
    animation: fadeInUp 0.8s ease;
}

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

/* Tablets */
@media (max-width: 992px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
        --spacing-xxl: 6rem;
    }

    .specialty-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .contact-image-placeholder {
        min-height: 250px;
    }

    .specialty-content-reverse {
        direction: ltr;
    }

    .services-grid,
    .portfolio-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
}

/* Mobile */
@media (max-width: 768px) {
    :root {
        --spacing-md: 1.5rem;
        --spacing-lg: 2.5rem;
        --spacing-xl: 3rem;
        --spacing-xxl: 4rem;
    }

    .nav-links {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background-color: var(--color-white);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        display: none;
        z-index: 1000;
    }

    .nav-links.active {
        display: flex;
    }

    .nav-link {
        padding: var(--spacing-sm) var(--spacing-md);
        border-bottom: 1px solid var(--color-gray-200);
        width: 100%;
    }

    .nav-link:last-child {
        border-bottom: none;
    }

    .search-icon {
        margin-top: var(--spacing-sm);
    }

    .hero {
        min-height: 90vh;
        padding-top: 60px;
    }

    .hero-title br {
        display: none;
    }

    .hero-subtitle br {
        display: none;
    }

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

    .section-description br {
        display: none;
    }

    .services-grid,
    .portfolio-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }

    .service-card-with-image {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .service-card-reverse {
        grid-template-columns: 1fr;
    }

    .service-image-placeholder {
        min-height: 300px;
        order: -1;
    }

    .service-card {
        padding: var(--spacing-md);
    }

    .footer-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }

    .contact-detail-item {
        text-align: center;
    }

    .social-links {
        justify-content: center;
    }

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

    .timeline-item {
        flex-direction: row;
        text-align: left;
        min-width: auto;
    }

    .timeline-item:not(:last-child)::after {
        display: none;
    }

    .timeline-icon {
        width: 48px;
        height: 48px;
        margin-bottom: 0;
        margin-right: var(--spacing-md);
        flex-shrink: 0;
    }

    .timeline-icon svg {
        width: 20px;
        height: 20px;
    }

    .timeline-content {
        display: flex;
        flex-direction: column;
        align-items: flex-start;
    }

    .timeline-content strong {
        font-size: 1rem;
        margin-bottom: 0.25rem;
    }

    .timeline-content span {
        font-size: 0.85rem;
        line-height: 1.4;
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    .btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.9rem;
    }

    .specialty-list li {
        padding: var(--spacing-sm) 0;
    }
}