/* ==================== CSS Variables (Design System) ==================== */
:root {
    /* Colors - HSL format */
    --background: hsl(0, 0%, 100%);
    --foreground: hsl(210, 11%, 15%);
    
    --primary: hsl(210, 100%, 25%);
    --primary-foreground: hsl(0, 0%, 100%);
    
    --secondary: hsl(210, 11%, 71%);
    --secondary-foreground: hsl(210, 11%, 15%);
    
    --accent: hsl(30, 100%, 50%);
    --accent-foreground: hsl(0, 0%, 100%);
    
    --muted: hsl(210, 20%, 95%);
    --muted-foreground: hsl(210, 11%, 46%);
    
    --border: hsl(210, 20%, 90%);
    --input: hsl(210, 20%, 90%);
    
    --card: hsl(0, 0%, 100%);
    --card-foreground: hsl(210, 11%, 15%);
    
    --construction-blue: hsl(210, 100%, 25%);
    --construction-orange: hsl(30, 100%, 50%);
    --construction-gray: hsl(210, 11%, 25%);
    --construction-light: hsl(210, 20%, 98%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Border Radius */
    --radius: 0.5rem;
    --radius-md: 0.375rem;
    --radius-sm: 0.25rem;
    
    /* 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);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--background);
    color: var(--foreground);
    line-height: 1.6;
    overflow-x: hidden;
}

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

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

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

/* ==================== Layout ==================== */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: 5rem 0;
}

.section-muted {
    background-color: var(--muted);
}

/* ==================== Navigation ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 50;
    background-color: #ffffff;
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.navbar.scrolled {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 6.5rem;
    padding: 0.5rem 0;
    transition: height 0.3s ease;
}

.navbar.scrolled .nav-container {
    height: 5.5rem;
}

.nav-brand {
    display: flex;
    align-items: center;
    text-decoration: none;
    flex-shrink: 0;
}

.nav-logo {
    width: 220px;
    height: auto;
    max-height: 85px;
    object-fit: contain;
    transition: all 0.3s ease;
}

.nav-logo:hover {
    transform: scale(1.05);
    opacity: 0.9;
}

.navbar.scrolled .nav-logo {
    width: 180px;
    max-height: 70px;
}

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

.nav-link {
    color: var(--foreground);
    transition: var(--transition-fast);
    font-weight: 500;
    text-decoration: none;
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 2rem;
    height: 2rem;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
}

.hamburger {
    width: 1.5rem;
    height: 2px;
    background-color: var(--foreground);
    position: relative;
    transition: var(--transition);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 2px;
    background-color: var(--foreground);
    transition: var(--transition);
}

.hamburger::before {
    top: -0.5rem;
}

.hamburger::after {
    bottom: -0.5rem;
}

.mobile-menu-btn.active .hamburger {
    background-color: transparent;
}

.mobile-menu-btn.active .hamburger::before {
    top: 0;
    transform: rotate(45deg);
}

.mobile-menu-btn.active .hamburger::after {
    bottom: 0;
    transform: rotate(-45deg);
}

/* Tablet Responsive */
@media (max-width: 968px) {
    .nav-container {
        height: 5.5rem;
    }
    
    .navbar.scrolled .nav-container {
        height: 5rem;
    }
    
    .nav-logo {
        width: 180px;
        max-height: 70px;
    }
    
    .navbar.scrolled .nav-logo {
        width: 150px;
        max-height: 60px;
    }
    
    .nav-menu {
        gap: var(--spacing-md);
    }
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .nav-container {
        height: 5rem;
    }
    
    .navbar.scrolled .nav-container {
        height: 4.5rem;
    }
    
    .nav-logo {
        width: 160px;
        max-height: 65px;
    }
    
    .navbar.scrolled .nav-logo {
        width: 140px;
        max-height: 55px;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 5rem;
        left: 0;
        right: 0;
        background-color: #ffffff;
        flex-direction: column;
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--border);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: var(--transition);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    .nav-container {
        height: 4.5rem;
    }
    
    .navbar.scrolled .nav-container {
        height: 4rem;
    }
    
    .nav-logo {
        width: 140px;
        max-height: 55px;
    }
    
    .navbar.scrolled .nav-logo {
        width: 120px;
        max-height: 48px;
    }
    
    .nav-menu {
        top: 4.5rem;
    }
}
/* ==================== Hero Section ==================== */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding-top: 4rem;
}
.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--construction-gray) 50%, var(--background) 100%);
    opacity: 0.9;
}
.hero-pattern {
    position: absolute;
    inset: 0;
    background-image: url('data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iNjAiIGhlaWdodD0iNjAiIHZpZXdCb3g9IjAgMCA2MCA2MCIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIj48ZyBmaWxsPSJub25lIiBmaWxsLXJ1bGU9ImV2ZW5vZGQiPjxwYXRoIGQ9Ik0zNiAxOGMzLjMxNCAwIDYgMi42ODYgNiA2cy0yLjY4NiA2LTYgNi02LTIuNjg2LTYtNiAyLjY4Ni02IDYtNnpNMTIgNDhjMy4zMTQgMCA2IDIuNjg2IDYgNnMtMi42ODYgNi02IDYtNi0yLjY4Ni02LTYgMi42ODYtNiA2LTZ6IiBzdHJva2U9IiNmZmYiIHN0cm9rZS1vcGFjaXR5PSIuMSIgc3Ryb2tlLXdpZHRoPSIyIi8+PC9nPjwvc3ZnPg==');
    opacity: 0.2;
}
.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
}

/* Mobile padding for hero content */
@media (max-width: 768px) {
    .hero-content {
        padding-top: 3rem;
        padding-bottom: 3rem;
    }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    color: var(--primary-foreground);
    margin-bottom: 1.5rem;
    line-height: 1.2;
}
.accent-text {
    color: var(--accent);
}
.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.5rem);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
    max-width: 48rem;
    margin-left: auto;
    margin-right: auto;
}
.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    justify-content: center;
    align-items: center;
    margin-bottom: 5rem;
}
.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-lg);
    margin-top: 5rem;
}
.stat-item {
    text-align: center;
}
.stat-number {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 0.5rem;
}
.stat-label {
    color: rgba(255, 255, 255, 0.8);
}
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    background: #10b981;
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 5px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    display: none;
    z-index: 1000;
    animation: slideIn 0.3s ease-out;
    min-width: 300px;
    text-align: center;
}
/* ==================== Section Headers ==================== */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--foreground);
}

.section-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--muted-foreground);
    max-width: 48rem;
    margin: 0 auto;
}

/* ==================== About Section ==================== */
/* About Section Intro */
.about-intro {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.about-intro-text {
    font-size: 1.125rem;
    line-height: 1.8;
    color: #6b7280;
    margin-bottom: 1rem;
}

/* Expandable Content */
.about-expandable {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease-out;
}

.about-expandable.expanded {
    max-height: 1000px;
    transition: max-height 0.7s ease-in;
}

.about-hidden-content {
    padding-top: 1rem;
    text-align: left;
}

.about-hidden-content p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: #6b7280;
    margin-bottom: 1.5rem;
}

.consultation-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 1rem;
    margin-top: 1.5rem;
}

.services-list {
    list-style: none;
    padding: 0;
    margin: 0 0 1.5rem 0;
}

.services-list li {
    font-size: 1.125rem;
    line-height: 1.8;
    color: #6b7280;
    padding: 0.5rem 0 0.5rem 2rem;
    position: relative;
}

.services-list li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #f97316;
    font-weight: bold;
    font-size: 1.25rem;
}

/* Read More Button */
.read-more-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: #f97316;
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 1rem;
}

.read-more-btn:hover {
    background: #ea580c;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(249, 115, 22, 0.3);
}

.read-more-btn svg {
    transition: transform 0.3s ease;
}

/* About Grid */
#about .about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    margin-top: 3rem;
}

@media (min-width: 768px) {
    #about .about-grid {
        grid-template-columns: 1fr 1fr;
    }
}

#about .about-content {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

#about .about-title {
    font-size: 2rem;
    font-weight: 700;
    color: #1f2937;
}

#about .about-text {
    font-size: 1.125rem;
    color: #6b7280;
    line-height: 1.8;
}

#about .features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

@media (max-width: 640px) {
    #about .features-grid {
        grid-template-columns: 1fr;
    }
}

#about .feature-card {
    background-color: #ffffff;
    padding: 1.5rem;
    border-radius: 0.5rem;
    border: 1px solid #e5e7eb;
    transition: all 0.3s ease;
}

#about .feature-card:hover {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transform: translateY(-5px);
}

#about .feature-icon {
    color: #f97316;
    margin-bottom: 1rem;
}

#about .feature-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #1f2937;
}

#about .feature-text {
    color: #6b7280;
    line-height: 1.6;
}
/* ==================== Services Section ==================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.service-card {
    background-color: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    transition: var(--transition);
}

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

.service-icon {
    color: var(--accent);
    margin-bottom: 1.5rem;
}

.service-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--card-foreground);
}

.service-description {
    color: var(--muted-foreground);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.service-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.service-features li {
    display: flex;
    align-items: center;
    color: var(--muted-foreground);
}

.service-features li::before {
    content: '';
    width: 0.5rem;
    height: 0.5rem;
    background-color: var(--accent);
    border-radius: 50%;
    margin-right: 0.75rem;
    flex-shrink: 0;
}

/* ==================== Forms ==================== */
.consultation-wrapper {
    max-width: 48rem;
    margin: 0 auto;
}

.consultation-form,
.contact-form {
    background-color: var(--card);
    padding: 2rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

@media (min-width: 768px) {
    .form-row {
        grid-template-columns: 1fr 1fr;
    }
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--foreground);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 0.625rem 0.75rem;
    border: 1px solid var(--input);
    border-radius: var(--radius-md);
    background-color: var(--background);
    color: var(--foreground);
    font-size: 0.875rem;
    transition: var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(14, 90, 165, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 80px;
    font-family: inherit;
}

.form-note {
    text-align: center;
    font-size: 0.875rem;
    color: var(--muted-foreground);
    margin-top: 1rem;
}

/* ==================== Buttons ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
    white-space: nowrap;
}

.btn-lg {
    padding: 0.75rem 2rem;
    font-size: 1.125rem;
}

.btn-full {
    width: 100%;
}

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

.btn-primary:hover {
    background-color: hsl(210, 100%, 20%);
}

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

.btn-accent:hover {
    background-color: hsl(30, 100%, 45%);
}

.btn-outline {
    background-color: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--primary-foreground);
}

.btn-outline:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.btn-icon {
    margin-left: 0.5rem;
}

.btn-icon-left {
    margin-right: 0.5rem;
}

/* ==================== Projects Section ==================== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.project-card {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.project-card:hover {
    box-shadow: var(--shadow-2xl);
}

.project-image {
    aspect-ratio: 4 / 3;
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.project-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(26, 29, 41, 0.95) 0%, rgba(26, 29, 41, 0.5) 50%, transparent 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 1.5rem;
    opacity: 0;
    transition: var(--transition);
    color: var(--primary-foreground);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.project-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    background-color: var(--accent);
    color: var(--accent-foreground);
    border-radius: 9999px;
    margin-bottom: 0.75rem;
    width: fit-content;
}

.project-title-overlay {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.project-description-overlay {
    color: rgba(255, 255, 255, 0.9);
}

.project-content {
    background-color: var(--card);
    padding: 1.5rem;
}

.project-badge-small {
    display: inline-flex;
    padding: 0.125rem 0.625rem;
    font-size: 0.75rem;
    font-weight: 600;
    background-color: var(--secondary);
    color: var(--secondary-foreground);
    border-radius: 0.25rem;
    margin-bottom: 0.5rem;
}

.project-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--card-foreground);
}

/* ==================== Contact Section ==================== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    max-width: 1200px;
    margin: 0 auto;
}

@media (min-width: 1024px) {
    .contact-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.contact-info-wrapper {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-info-card,
.contact-form-card {
    background-color: var(--card);
    padding: 2rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.contact-card-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--card-foreground);
}

.contact-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.contact-icon {
    color: var(--accent);
    flex-shrink: 0;
    margin-top: 0.25rem;
}

.contact-item-title {
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--card-foreground);
}

.contact-item p {
    color: var(--muted-foreground);
    font-size: 0.875rem;
}

.map-container {
    height: 16rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    overflow: hidden;
}

/* ==================== Footer ==================== */
.footer {
    background-color: var(--construction-gray);
    color: var(--primary-foreground);
    padding: 3rem 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-brand {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.footer-text {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition-fast);
}

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

.footer-links li {
    color: rgba(255, 255, 255, 0.8);
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition-fast);
}

.social-link:hover {
    color: var(--accent);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: 2rem;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.8);
}

/* ==================== Toast Notification ==================== */


/* ==================== Form Divider (WhatsApp) ==================== */
.form-divider {
    display: flex;
    align-items: center;
    text-align: center;
    margin: var(--spacing-lg) 0;
}

.form-divider::before,
.form-divider::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--border);
}

.form-divider-arrow-btn {
    background: linear-gradient(135deg, var(--primary) 0%, hsl(210, 100%, 30%) 100%);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
    border: 2px solid var(--primary);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.form-divider-arrow-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 0.5s;
}

.form-divider-arrow-btn:hover::before {
    left: 100%;
}

.form-divider-arrow-btn:hover {
    background: linear-gradient(135deg, hsl(210, 100%, 30%) 0%, var(--primary) 100%);
    transform: translateY(2px);
    box-shadow: var(--shadow-lg);
}

.form-divider-arrow-btn svg {
    transition: transform 0.3s ease;
}

.form-divider-arrow-btn:hover svg {
    transform: translateY(3px);
    animation: bounce 0.6s ease infinite;
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(4px);
    }
}

.btn-whatsapp {
    background: linear-gradient(135deg, hsl(142, 70%, 50%) 0%, hsl(142, 70%, 42%) 100%);
    color: hsl(0, 0%, 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    transition: var(--transition);
    box-shadow: var(--shadow-md);
    border: 2px solid hsl(142, 70%, 45%);
    font-weight: 700;
    font-size: 1rem;
    position: relative;
    overflow: hidden;
}

.btn-whatsapp::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 0.5s;
}

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

.btn-whatsapp:hover {
    background: linear-gradient(135deg, hsl(142, 70%, 45%) 0%, hsl(142, 70%, 37%) 100%);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px -5px hsla(142, 70%, 42%, 0.5);
    border-color: hsl(142, 70%, 40%);
}

.btn-whatsapp:active {
    transform: translateY(0);
    box-shadow: var(--shadow);
}

/* ==================== Back to Top Button ==================== */
.back-to-top {
    position: fixed;
    bottom: 100px;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary) 0%, hsl(210, 100%, 30%) 100%);
    color: white;
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: linear-gradient(135deg, hsl(210, 100%, 30%) 0%, var(--primary) 100%);
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.back-to-top svg {
    width: 24px;
    height: 24px;
}

@media (max-width: 768px) {
    .back-to-top {
        bottom: 80px;
        right: 1.5rem;
        width: 45px;
        height: 45px;
    }
    
    .back-to-top svg {
        width: 20px;
        height: 20px;
    }
}

/* ==================== Animations ==================== */
.fade-in {
    animation: fadeIn 0.6s ease-out;
}

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

/* ==================== Responsive Adjustments ==================== */
@media (max-width: 768px) {
    .section {
        padding: 3rem 0;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .hero-buttons .btn {
        width: 100%;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .toast {
        right: 1rem;
        left: 1rem;
        bottom: 1rem;
    }
}

@media (max-width: 480px) {
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
    }
}