/* ===================================
   CSS RESET & BASE STYLES
   =================================== */

:root {
    /* Colors */
    --primary-color: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --secondary-color: #10b981;
    --accent-color: #f59e0b;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #f9fafb;
    --background-primary: #ffffff;
    --background-secondary: #f9fafb;
    --background-dark: #111827;
    --border-color: #e5e7eb;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --shadow-hover: rgba(99, 102, 241, 0.15);
    
    /* Typography */
    --font-family: 'Inter', 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;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 2.5rem;
    --spacing-3xl: 3rem;
    --spacing-4xl: 4rem;
    --spacing-5xl: 5rem;
    
    /* Layout */
    --max-width: 1200px;
    --header-height: 80px;
    --border-radius: 0.5rem;
    --border-radius-lg: 1rem;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 100%;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

/* Scroll progress bar */
::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    width: 0%;
    z-index: 1001;
    transition: width 0.1s ease;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===================================
   TYPOGRAPHY
   =================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

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

a:hover {
    color: var(--primary-dark);
}

/* ===================================
   UTILITY CLASSES
   =================================== */

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-4xl);
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.highlight {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===================================
   BUTTONS
   =================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    box-shadow: 0 4px 14px 0 rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
    color: white;
}

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

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.2);
}

.btn-full {
    width: 100%;
}

.btn-loading {
    display: none;
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* ===================================
   NAVIGATION
   =================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 4px 20px var(--shadow-color);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
}

.nav-brand {
    display: flex;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 700;
    font-size: var(--font-size-xl);
    color: var(--text-primary);
}

.logo-img {
    width: 32px;
    height: 32px;
}

.logo-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-link {
    font-weight: 500;
    color: var(--text-secondary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    transition: var(--transition);
    position: relative;
    display: flex;
    align-items: center;
}

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

.nav-link.active {
    color: var(--primary-color);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(16, 185, 129, 0.1));
    font-weight: 600;
}

.nav-link.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
    border-radius: 3px;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.nav-toggle .bar {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 3px;
    transition: var(--transition);
}

/* ===================================
   HERO SECTION
   =================================== */

.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite;
    padding: calc(var(--header-height) + var(--spacing-4xl)) 0 var(--spacing-4xl);
    color: white;
    position: relative;
    overflow: hidden;
}

@keyframes gradientBG {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.2);
    z-index: 1;
}

.hero .container {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-4xl);
    align-items: center;
    min-height: 70vh;
}

.hero-content {
    text-align: center;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-lg);
    color: white;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: rgba(255, 255, 255, 0.9);
    max-width: 600px;
    margin: 0 auto var(--spacing-2xl);
    line-height: 1.7;
}

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

.hero-image {
    text-align: center;
}

.hero-img {
    max-width: 100%;
    height: auto;
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.3));
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.scroll-arrow {
    width: 30px;
    height: 30px;
    border: 2px solid rgba(255, 255, 255, 0.8);
    border-radius: 50%;
    position: relative;
    animation: bounce 2s infinite;
    cursor: pointer;
}

.scroll-arrow::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 8px;
    height: 8px;
    border-bottom: 2px solid rgba(255, 255, 255, 0.8);
    border-right: 2px solid rgba(255, 255, 255, 0.8);
    transform: translateX(-50%) 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); }
}

/* Section transition animations */
@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* ===================================
   ABOUT SECTION
   =================================== */

.about {
    padding: var(--spacing-5xl) 0;
    background: linear-gradient(180deg, var(--background-secondary) 0%, var(--background-primary) 100%);
    transition: var(--transition);
}

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

.about-content h3 {
    font-size: var(--font-size-3xl);
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

.stat-item {
    text-align: center;
    padding: var(--spacing-lg);
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: 0 4px 6px var(--shadow-color);
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px var(--shadow-color);
}

.stat-number {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: 500;
}

.about-image {
    text-align: center;
}

.about-img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius-lg);
    box-shadow: 0 20px 40px var(--shadow-color);
}

/* ===================================
   SERVICES SECTION
   =================================== */

.services {
    padding: var(--spacing-5xl) 0;
    background: linear-gradient(180deg, var(--background-primary) 0%, rgba(99, 102, 241, 0.02) 100%);
    position: relative;
    transition: var(--transition);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-2xl);
}

.service-card {
    background: white;
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 4px 6px var(--shadow-color);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}

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

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px var(--shadow-hover);
}

.service-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    color: white;
}

.service-icon svg {
    width: 30px;
    height: 30px;
}

.service-title {
    font-size: var(--font-size-xl);
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.service-description {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===================================
   PORTFOLIO SECTION
   =================================== */

.portfolio {
    padding: var(--spacing-5xl) 0;
    background: linear-gradient(180deg, var(--background-primary) 0%, var(--background-secondary) 100%);
    transition: var(--transition);
}

.portfolio-filter {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-4xl);
    flex-wrap: wrap;
}

.filter-btn {
    background: white;
    color: var(--text-secondary);
    border: 2px solid var(--border-color);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

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

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-2xl);
}

.portfolio-item {
    background: white;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: 0 4px 6px var(--shadow-color);
    transition: var(--transition);
}

.portfolio-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px var(--shadow-color);
}

.portfolio-image {
    position: relative;
    overflow: hidden;
}

.portfolio-image img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    transition: var(--transition);
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(99, 102, 241, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

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

.portfolio-item:hover .portfolio-image img {
    transform: scale(1.1);
}

.portfolio-info {
    text-align: center;
    color: white;
    padding: var(--spacing-lg);
}

.portfolio-info h4 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
    color: white;
}

.portfolio-info p {
    margin-bottom: var(--spacing-lg);
    color: rgba(255, 255, 255, 0.9);
}

.portfolio-link {
    background: white;
    color: var(--primary-color);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius);
    font-weight: 500;
    transition: var(--transition);
}

.portfolio-link:hover {
    background: var(--primary-light);
    color: white;
}

/* ===================================
   CONTACT SECTION
   =================================== */

.contact {
    padding: var(--spacing-5xl) 0;
    background: linear-gradient(180deg, var(--background-secondary) 0%, var(--background-primary) 100%);
    position: relative;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-4xl);
}

.contact-info h3 {
    font-size: var(--font-size-3xl);
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
    padding: var(--spacing-lg);
    background: var(--background-secondary);
    border-radius: var(--border-radius-lg);
    transition: var(--transition);
}

.contact-item:hover {
    background: white;
    box-shadow: 0 4px 6px var(--shadow-color);
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.contact-icon svg {
    width: 24px;
    height: 24px;
}

.contact-item h4 {
    font-size: var(--font-size-lg);
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.contact-item p {
    color: var(--text-secondary);
    margin: 0;
}

/* ===================================
   FORM STYLES
   =================================== */

.contact-form {
    background: white;
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 4px 6px var(--shadow-color);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.form-group {
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-lg) var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    background: var(--background-secondary);
    transition: var(--transition);
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: white;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group label {
    position: absolute;
    top: var(--spacing-lg);
    left: var(--spacing-md);
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    transition: var(--transition);
    pointer-events: none;
    background: var(--background-secondary);
    padding: 0 var(--spacing-xs);
}

.form-group input:focus + label,
.form-group textarea:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:not(:placeholder-shown) + label {
    top: -10px;
    left: calc(var(--spacing-md) - var(--spacing-xs));
    font-size: var(--font-size-sm);
    color: var(--primary-color);
    background: white;
}

/* ===================================
   FOOTER
   =================================== */

.footer {
    background: linear-gradient(135deg, var(--background-dark) 0%, rgba(17, 24, 39, 0.95) 100%);
    color: var(--text-light);
    padding: var(--spacing-4xl) 0 var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    position: relative;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-4xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-brand {
    max-width: 400px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 700;
    font-size: var(--font-size-xl);
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
}

.footer-description {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-lg);
}

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

.social-link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    transition: var(--transition);
}

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

.social-link svg {
    width: 20px;
    height: 20px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-2xl);
}

.footer-section h4 {
    font-size: var(--font-size-lg);
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: var(--spacing-sm);
}

.footer-section a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.footer-section a:hover {
    color: var(--primary-light);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-copyright,
.footer-credits {
    color: rgba(255, 255, 255, 0.6);
    font-size: var(--font-size-sm);
}

/* ===================================
   SCROLL TO TOP
   =================================== */

.scroll-top {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.3);
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
}

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

/* ===================================
   NEWSLETTER SECTION
   =================================== */

.newsletter {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    padding: var(--spacing-5xl) 0;
    position: relative;
    overflow: hidden;
}

.newsletter::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 500px;
    height: 500px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    z-index: 1;
}

.newsletter-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    color: white;
}

.newsletter-text h2 {
    font-size: var(--font-size-4xl);
    color: white;
    margin-bottom: var(--spacing-md);
}

.newsletter-text p {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-2xl);
}

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

.form-row {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    justify-content: center;
}

.newsletter-form input {
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    flex: 1;
    min-width: 250px;
    background: white;
    color: var(--text-primary);
    transition: var(--transition);
}

.newsletter-form input:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.2);
}

.newsletter-form .btn {
    padding: var(--spacing-md) var(--spacing-2xl);
    font-weight: 600;
    white-space: nowrap;
}

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

/* Large Desktop */
@media (min-width: 1200px) {
    .hero .container {
        grid-template-columns: 1fr 1fr;
        text-align: left;
    }
    
    .hero-content {
        text-align: left;
    }
    
    .hero-buttons {
        justify-content: flex-start;
    }
    
    .about-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr 2fr;
    }
}

/* Desktop */
@media (min-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .portfolio-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Tablet */
@media (max-width: 768px) {
    :root {
        --font-size-5xl: 2.5rem;
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.5rem;
        --spacing-5xl: 4rem;
        --spacing-4xl: 3rem;
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: -100%;
        width: 100%;
        height: calc(100vh - var(--header-height));
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: var(--spacing-4xl);
        transition: var(--transition);
        box-shadow: 0 4px 20px var(--shadow-color);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active .bar:nth-child(1) {
        transform: rotate(-45deg) translate(-5px, 6px);
    }
    
    .nav-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active .bar:nth-child(3) {
        transform: rotate(45deg) translate(-5px, -6px);
    }
    
    .hero {
        padding: calc(var(--header-height) + var(--spacing-2xl)) 0 var(--spacing-2xl);
        text-align: center;
    }
    
    .hero-title {
        font-size: var(--font-size-4xl);
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .portfolio-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
    
    .stats {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

/* Mobile */
@media (max-width: 480px) {
    :root {
        --font-size-5xl: 2rem;
        --font-size-4xl: 1.75rem;
        --spacing-5xl: 3rem;
        --spacing-4xl: 2rem;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero-buttons {
        gap: var(--spacing-md);
    }
    
    .btn {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: var(--font-size-sm);
    }
    
    .services-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .service-card {
        padding: var(--spacing-lg);
    }
    
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    
    .portfolio-filter {
        gap: var(--spacing-sm);
    }
    
    .filter-btn {
        padding: var(--spacing-xs) var(--spacing-md);
        font-size: var(--font-size-sm);
    }
    
    .stats {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .contact-form {
        padding: var(--spacing-lg);
    }
    
    .scroll-top {
        width: 45px;
        height: 45px;
        bottom: var(--spacing-md);
        right: var(--spacing-md);
    }
}

/* ===================================
   ANIMATIONS & EFFECTS
   =================================== */

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

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

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.fade-in-left {
    animation: fadeInLeft 0.8s ease-out;
}

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

.fade-in-right {
    animation: fadeInRight 0.8s ease-out;
}

/* Loading animation for form submission */
.form-loading .btn-loading {
    display: inline-block;
}

.form-loading .btn-primary {
    pointer-events: none;
    opacity: 0.7;
}

/* Smooth scrolling behavior */
html {
    scroll-behavior: smooth;
}

/* Focus styles for accessibility */
*:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

button:focus,
input:focus,
textarea:focus,
.btn:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #000080;
        --text-secondary: #000000;
        --border-color: #000000;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Dark mode support (optional) */
@media (prefers-color-scheme: dark) {
    :root {
        --background-primary: #111827;
        --background-secondary: #1f2937;
        --text-primary: #f9fafb;
        --text-secondary: #d1d5db;
        --border-color: #374151;
        --shadow-color: rgba(0, 0, 0, 0.3);
    }
    
    .navbar {
        background: rgba(17, 24, 39, 0.95);
    }
    
    .service-card,
    .portfolio-item,
    .contact-form {
        background: var(--background-secondary);
        border-color: var(--border-color);
    }
}