/* ===== CSS VARIABLES ===== */
:root {
    /* Colors */
    --primary: #0383a0;
    --primary-dark: #026b85;
    --primary-light: #4da6c0;
    --secondary: #f97d09;
    --secondary-dark: #e06d08;
    --secondary-light: #ffa040;
    
    /* Neutrals */
    --white: #ffffff;
    --black: #000000;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-light) 100%);
    --gradient-hero: linear-gradient(135deg, rgba(3, 131, 160, 0.9) 0%, rgba(249, 125, 9, 0.8) 100%);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 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);
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 0.15s ease-out;
    --transition-base: 0.3s ease-out;
    --transition-slow: 0.5s ease-out;
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--white);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul {
    list-style: none;
}

/* ===== UTILITY CLASSES ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--space-6);
    }
}

@media (min-width: 1024px) {
    .container {
        padding: 0 var(--space-8);
    }
}

.section {
    padding: var(--space-16) 0;
}

@media (min-width: 768px) {
    .section {
        padding: var(--space-20) 0;
    }
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-16);
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--space-4);
    position: relative;
}

@media (min-width: 768px) {
    .section-title {
        font-size: var(--font-size-4xl);
    }
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -var(--space-2);
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--gradient-secondary);
    border-radius: var(--radius-full);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ===== LOADING SCREEN ===== */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loading-spinner {
    text-align: center;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--gray-200);
    border-top: 4px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--space-4);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-spinner p {
    color: var(--gray-600);
    font-weight: 500;
}

/* ===== HEADER ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    z-index: var(--z-fixed);
    transition: all var(--transition-base);
}

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

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) 0;
    max-width: 1200px;
    margin: 0 auto;
    padding-left: var(--space-4);
    padding-right: var(--space-4);
}

@media (min-width: 768px) {
    .navbar {
        padding-left: var(--space-6);
        padding-right: var(--space-6);
    }
}

@media (min-width: 1024px) {
    .navbar {
        padding-left: var(--space-8);
        padding-right: var(--space-8);
    }
}

.logo-container {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 40px;
    width: auto;
    transition: transform var(--transition-base);
}

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

@media (min-width: 768px) {
    .logo-img {
        height: 50px;
    }
}

/* Desktop Navigation */
.nav-links {
    display: none;
    gap: var(--space-8);
}

@media (min-width: 1024px) {
    .nav-links {
        display: flex;
    }
}

.nav-link {
    font-weight: 500;
    color: var(--gray-700);
    position: relative;
    padding: var(--space-2) 0;
    transition: color var(--transition-base);
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-secondary);
    transition: width var(--transition-base);
}

.nav-link:hover::after {
    width: 100%;
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: var(--space-2);
    z-index: var(--z-modal);
    transition: transform var(--transition-base);
}

@media (min-width: 1024px) {
    .menu-toggle {
        display: none;
    }
}

.hamburger-line {
    width: 24px;
    height: 2px;
    background: var(--gray-700);
    transition: all var(--transition-base);
    transform-origin: center;
}

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

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

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

/* Mobile Menu Overlay */
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    z-index: var(--z-modal-backdrop);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.mobile-menu-overlay.active {
    opacity: 1;
    visibility: visible;
}

.mobile-menu {
    position: absolute;
    top: 0;
    right: 0;
    width: 280px;
    height: 100vh;
    background: var(--white);
    padding: var(--space-20) var(--space-6) var(--space-6);
    transform: translateX(100%);
    transition: transform var(--transition-base);
    box-shadow: var(--shadow-xl);
    overflow-y: auto;
}

.mobile-menu-overlay.active .mobile-menu {
    transform: translateX(0);
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.mobile-nav-link {
    font-size: var(--font-size-lg);
    font-weight: 500;
    color: var(--gray-700);
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--gray-200);
    transition: color var(--transition-base);
}

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

/* ===== HERO SECTION ===== */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('../img/bkg2.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    z-index: -2;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-hero);
    z-index: -1;
}

.hero-content {
    text-align: center;
    color: var(--white);
    max-width: 800px;
    padding: 0 var(--space-4);
    z-index: 1;
}

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

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-6);
}

@media (min-width: 768px) {
    .hero-title {
        font-size: var(--font-size-5xl);
    }
}

@media (min-width: 1024px) {
    .hero-title {
        font-size: var(--font-size-6xl);
    }
}

.hero-title-line {
    display: block;
    animation: fadeInUp 1s ease-out;
}

.hero-title-line:nth-child(2) {
    animation-delay: 0.2s;
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    font-weight: 400;
    margin-bottom: var(--space-8);
    opacity: 0.9;
    animation: fadeInUp 1s ease-out 0.4s both;
}

@media (min-width: 768px) {
    .hero-subtitle {
        font-size: var(--font-size-xl);
    }
}

.hero-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    align-items: center;
    animation: fadeInUp 1s ease-out 0.6s both;
}

@media (min-width: 768px) {
    .hero-buttons {
        flex-direction: row;
        justify-content: center;
        gap: var(--space-6);
    }
}

/* Scroll Indicator */
.scroll-indicator {
    padding-top:15px;
    position: absolute;
    bottom: var(--space-8);
    left: auto;
    transform: translateX(-50%);
    display: none; /* Adicionado */
    flex-direction: column; /* Adicionado */
    align-items: center; /* Adicionado */
    justify-content: center; /* Adicionado */
    color: var(--white);
    animation: fadeInUp 1s ease-out 0.8s both;
    width: auto; /* Adicionado */
    white-space: nowrap; /* Adicionado */
}


.scroll-mouse {
    width: 24px;
    height: 40px;
    border: 2px solid var(--white);
    border-radius: 12px;
    margin: 0 auto var(--space-2);
    position: relative;
}

.scroll-wheel {
    width: 4px;
    height: 8px;
    background: var(--white);
    border-radius: 2px;
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll-wheel 2s infinite;
}

@keyframes scroll-wheel {
    0% { top: 6px; opacity: 1; }
    50% { top: 20px; opacity: 0.5; }
    100% { top: 6px; opacity: 1; }
}

.scroll-indicator p {
    font-size: var(--font-size-sm);
    opacity: 0.8;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-6);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-align: center;
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    text-decoration: none;
    border: 2px solid transparent;
}

.btn::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: left var(--transition-slow);
}

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

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

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

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

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

@media (min-width: 768px) {
    .btn {
        padding: var(--space-4) var(--space-8);
        font-size: var(--font-size-lg);
    }
}

/* ===== ABOUT SECTION ===== */
.about-section {
    background: var(--gray-50);
}

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

.about-text {
    display: grid;
    gap: var(--space-8);
}

@media (min-width: 768px) {
    .about-text {
        gap: var(--space-10);
    }
}

.about-card {
    display: flex;
    gap: var(--space-6);
    align-items: flex-start;
    padding: var(--space-6);
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transition: all var(--transition-base);
    animation: fadeInUp 0.6s ease-out;
}

.about-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.about-card:nth-child(2) {
    animation-delay: 0.2s;
}

.about-card:nth-child(3) {
    animation-delay: 0.4s;
}

.about-icon {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: var(--font-size-2xl);
}

.about-card p {
    font-size: var(--font-size-lg);
    line-height: 1.7;
    color: var(--gray-600);
}

/* ===== SOLUTIONS SECTION ===== */
.solutions-section {
    background: var(--white);
}

.solutions-grid {
    display: grid;
    gap: var(--space-8);
    margin-top: var(--space-16);
}

@media (min-width: 768px) {
    .solutions-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-10);
    }
}

@media (min-width: 1024px) {
    .solutions-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.solution-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    animation: fadeInUp 0.6s ease-out;
}

.solution-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-secondary);
}

.solution-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.solution-card:nth-child(2) {
    animation-delay: 0.2s;
}

.solution-card:nth-child(3) {
    animation-delay: 0.4s;
}

.solution-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: var(--font-size-3xl);
    margin-bottom: var(--space-6);
    transition: transform var(--transition-base);
}

.solution-card:hover .solution-icon {
    transform: scale(1.1);
}

.solution-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--primary);
    margin-bottom: var(--space-4);
}

.solution-description {
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--gray-600);
    margin-bottom: var(--space-6);
}

.solution-features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.feature-tag {
    padding: var(--space-1) var(--space-3);
    background: var(--gray-100);
    color: var(--gray-700);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

.solution-card:hover .feature-tag {
    background: var(--primary);
    color: var(--white);
}

/* ===== GALLERY SECTION ===== */
.gallery-section {
    background: var(--gray-50);
}

.gallery-container {
    margin-top: var(--space-16);
}

.gallery-grid {
    display: grid;
    gap: var(--space-6);
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

@media (min-width: 768px) {
    .gallery-grid {
        gap: var(--space-8);
        grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    }
}

.gallery-item {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all var(--transition-base);
    animation: fadeInUp 0.6s ease-out;
}

.gallery-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.gallery-item:nth-child(2) {
    animation-delay: 0.1s;
}

.gallery-item:nth-child(3) {
    animation-delay: 0.2s;
}

.gallery-item:nth-child(4) {
    animation-delay: 0.3s;
}

.gallery-item:nth-child(5) {
    animation-delay: 0.4s;
}

.gallery-image-container {
    position: relative;
    height: 250px;
    overflow: hidden;
}

.gallery-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.gallery-item:hover .gallery-image {
    transform: scale(1.05);
}

.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(3, 131, 160, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.gallery-item:hover .gallery-overlay {
    opacity: 1;
}

.gallery-icon {
    color: var(--white);
    font-size: var(--font-size-3xl);
    transform: scale(0.8);
    transition: transform var(--transition-base);
}

.gallery-item:hover .gallery-icon {
    transform: scale(1);
}

.gallery-caption {
    padding: var(--space-6);
}

.gallery-caption h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--primary);
    margin-bottom: var(--space-2);
}

.gallery-caption p {
    font-size: var(--font-size-sm);
    color: var(--gray-600);
    line-height: 1.6;
}

/* ===== PARTNERS SECTION ===== */
.partners-section {
    background: var(--white);
}

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

.partners-logos {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: var(--space-8);
    margin-bottom: var(--space-12);
}

@media (min-width: 768px) {
    .partners-logos {
        gap: var(--space-12);
    }
}

.partner-item {
    flex: 0 0 auto;
    animation: fadeInUp 0.6s ease-out;
}

.partner-item:nth-child(2) {
    animation-delay: 0.2s;
}

.partner-item:nth-child(3) {
    animation-delay: 0.4s;
}

.partner-logo {
    max-width: 150px;
    height: auto;
    filter: grayscale(100%) opacity(0.7);
    transition: all var(--transition-base);
}

.partner-logo:hover {
    filter: grayscale(0%) opacity(1);
    transform: scale(1.05);
}

.partners-description {
    text-align: center;
}

.partners-description p {
    font-size: var(--font-size-lg);
    line-height: 1.7;
    color: var(--gray-600);
}

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

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

.contact-section .section-subtitle {
    color: rgba(255, 255, 255, 0.9);
}

.contact-content {
    max-width: 800px;
    margin: 0 auto;
}

.contact-info {
    display: grid;
    gap: var(--space-6);
    margin-top: var(--space-16);
}

@media (min-width: 768px) {
    .contact-info {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-8);
    }
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-6);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all var(--transition-base);
    animation: fadeInUp 0.6s ease-out;
}

.contact-item:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

.contact-item:nth-child(2) {
    animation-delay: 0.1s;
}

.contact-item:nth-child(3) {
    animation-delay: 0.2s;
}

.contact-item:nth-child(4) {
    animation-delay: 0.3s;
}

.contact-icon {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    background: var(--gradient-secondary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
}

.contact-details h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--space-1);
    opacity: 0.9;
}

.contact-details a,
.contact-details span {
    font-size: var(--font-size-lg);
    font-weight: 500;
    transition: color var(--transition-base);
}

.contact-details a:hover {
    color: var(--secondary-light);
}

/* ===== FOOTER ===== */
.footer {
    background: var(--gray-900);
    color: var(--white);
    padding: var(--space-12) 0 var(--space-6);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-8);
    margin-bottom: var(--space-8);
}

@media (min-width: 768px) {
    .footer-content {
        flex-direction: row;
        justify-content: space-between;
    }
}

.footer-logo-img {
    height: 40px;
    width: auto;
    filter: brightness(0) invert(1);
}

.footer-social {
    display: flex;
    gap: var(--space-4);
}

.social-link {
    width: 50px;
    height: 50px;
    background: var(--gray-800);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    transition: all var(--transition-base);
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--space-6);
    border-top: 1px solid var(--gray-800);
}

.footer-bottom p {
    color: var(--gray-400);
    font-size: var(--font-size-sm);
}

/* ===== BACK TO TOP BUTTON ===== */
.back-to-top {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
    z-index: var(--z-fixed);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

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

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* ===== SCROLL ANIMATIONS ===== */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 767px) {
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .section {
        padding: var(--space-12) 0;
    }
    
    .section-title {
        font-size: var(--font-size-2xl);
    }
    
    .about-card {
        flex-direction: column;
        text-align: center;
    }
    
    .contact-info {
        grid-template-columns: 1fr;
    }
    
    .gallery-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* Focus styles for keyboard navigation */
a:focus,
button:focus {
    outline: 2px solid var(--secondary);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
        --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.5);
        --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.5);
    }
}