/* ==========================================
   RESPONSIVE DESIGN - MOBILE FIRST APPROACH
   ========================================== */

/* ==========================================
   TABLET STYLES (768px and down)
   ========================================== */
@media screen and (max-width: 768px) {
    /* Typography Adjustments */
    :root {
        --text-6xl: 2.5rem;
        --text-5xl: 2.25rem;
        --text-4xl: 1.875rem;
        --text-3xl: 1.5rem;
        --container-padding: 1rem;
    }

    /* Navigation */
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding: var(--spacing-4xl) var(--spacing-xl);
        transition: left var(--transition-normal);
        border-top: 1px solid rgba(43, 76, 126, 0.1);
        z-index: 999;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-item {
        width: 100%;
        text-align: center;
        margin-bottom: var(--spacing-lg);
    }

    .nav-link {
        display: block;
        padding: var(--spacing-lg);
        font-size: var(--text-lg);
        width: 100%;
        border-radius: var(--radius-lg);
    }

    .nav-link.cta-button {
        margin-top: var(--spacing-lg);
        background: var(--gradient-primary);
        color: var(--white);
    }

    .nav-toggle {
        display: flex;
    }

    /* Hero Section */
    .hero {
        min-height: 90vh;
        padding: var(--spacing-2xl) 0;
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
        text-align: center;
    }

    .hero-title {
        font-size: var(--text-4xl);
    }

    .hero-subtitle {
        font-size: var(--text-lg);
    }

    .hero-features {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
        justify-items: center;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-md);
    }

    .hero-cta .btn {
        width: 100%;
        justify-content: center;
        max-width: 300px;
    }

    .image-container {
        width: 300px;
        height: 300px;
    }

    .profile-photo {
        font-size: 6rem;
    }

    .floating-card {
        font-size: var(--text-sm);
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .floating-card.card-1 {
        top: 10%;
        left: -10%;
    }

    .floating-card.card-2 {
        top: 70%;
        right: -10%;
    }

    .floating-card.card-3 {
        bottom: 10%;
        left: -5%;
    }

    /* About Section */
    .about-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .about-stats {
        position: static;
    }

    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-md);
    }

    .stat-item {
        padding: var(--spacing-md);
    }

    .stat-number {
        font-size: var(--text-3xl);
    }

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

    .expertise-icon {
        margin: 0 auto;
    }

    /* Services Section */
    .services-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .service-card.featured {
        transform: none;
    }

    /* Testimonials */
    .testimonials-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .summary-stats {
        flex-direction: column;
        gap: var(--spacing-xl);
    }

    /* Contact Section */
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .contact-methods .contact-method {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-md);
    }

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

    /* Footer */
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
        text-align: center;
    }

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

    .footer-links {
        align-items: center;
    }

    .footer-contact {
        align-items: center;
    }
}

/* ==========================================
   MOBILE STYLES (480px and down)
   ========================================== */
@media screen and (max-width: 480px) {
    /* Further Typography Adjustments */
    :root {
        --text-6xl: 2rem;
        --text-5xl: 1.875rem;
        --text-4xl: 1.5rem;
        --text-3xl: 1.25rem;
        --spacing-4xl: 3rem;
        --spacing-3xl: 2rem;
        --spacing-2xl: 1.5rem;
        --container-padding: 0.75rem;
    }

    /* Navigation Logo */
    .nav-logo .logo-text {
        font-size: var(--text-lg);
    }

    .nav-logo .logo-subtitle {
        font-size: var(--text-xs);
    }

    /* Hero Adjustments */
    .hero {
        padding: var(--spacing-xl) 0;
    }

    .hero-title {
        font-size: var(--text-3xl);
        line-height: 1.2;
    }

    .hero-subtitle {
        font-size: var(--text-base);
    }

    .image-container {
        width: 250px;
        height: 250px;
    }

    .profile-photo {
        font-size: 4rem;
    }

    .floating-card {
        display: none; /* Hide floating elements on small screens */
    }

    /* Button Adjustments */
    .btn {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: var(--text-sm);
    }

    .btn-large {
        padding: var(--spacing-md) var(--spacing-xl);
        font-size: var(--text-base);
    }

    /* Section Spacing */
    .about,
    .services,
    .testimonials,
    .contact {
        padding: var(--spacing-3xl) 0;
    }

    /* Stats Grid */
    .stats-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    .stat-item {
        padding: var(--spacing-sm);
    }

    /* Service Cards */
    .service-card {
        padding: var(--spacing-xl);
    }

    .service-icon {
        width: 60px;
        height: 60px;
        font-size: var(--text-2xl);
    }

    /* Testimonial Cards */
    .testimonial-card {
        padding: var(--spacing-xl);
    }

    .testimonial-text {
        font-size: var(--text-base);
    }

    /* Contact Form */
    .contact-form-container {
        padding: var(--spacing-xl);
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
        padding: var(--spacing-sm);
    }

    /* Footer Adjustments */
    .footer {
        padding: var(--spacing-3xl) 0 var(--spacing-md);
    }

    .footer-content {
        gap: var(--spacing-lg);
    }
}

/* ==========================================
   LARGE DESKTOP STYLES (1200px and up)
   ========================================== */
@media screen and (min-width: 1200px) {
    :root {
        --container-max-width: 1400px;
        --container-padding: 2rem;
    }

    /* Enhanced Hero Section */
    .hero-title {
        font-size: 4.5rem;
    }

    .hero-subtitle {
        font-size: var(--text-2xl);
    }

    .image-container {
        width: 500px;
        height: 500px;
    }

    .profile-photo {
        font-size: 10rem;
    }

    /* Enhanced About Section */
    .about-content {
        gap: var(--spacing-4xl);
    }

    /* Enhanced Services */
    .services-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    /* Enhanced Contact */
    .contact-content {
        gap: var(--spacing-4xl);
    }
}

/* ==========================================
   ACCESSIBILITY IMPROVEMENTS
   ========================================== */

/* Focus Styles */
.btn:focus,
.nav-link:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 3px solid var(--primary-blue);
    outline-offset: 2px;
}

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

    .floating-card {
        animation: none;
    }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --primary-blue: #000080;
        --primary-green: #006400;
        --medium-gray: #000000;
        --light-gray: #FFFFFF;
    }

    .btn-outline {
        border-width: 3px;
    }

    .service-card,
    .testimonial-card,
    .contact-method {
        border: 2px solid var(--dark-gray);
    }
}

/* ==========================================
   PRINT STYLES
   ========================================== */
@media print {
    * {
        background: white !important;
        color: black !important;
        box-shadow: none !important;
    }

    .header,
    .nav-toggle,
    .hero-cta,
    .floating-elements,
    .contact-form,
    .footer {
        display: none;
    }

    .hero {
        min-height: auto;
        padding: var(--spacing-lg) 0;
    }

    .section-title::after {
        display: none;
    }

    .about,
    .services,
    .testimonials {
        padding: var(--spacing-lg) 0;
    }

    .container {
        padding: 0;
        max-width: 100%;
    }
}

/* ==========================================
   PERFORMANCE OPTIMIZATIONS
   ========================================== */

/* Hardware Acceleration for Smooth Animations */
.btn,
.service-card,
.testimonial-card,
.floating-card,
.nav-menu {
    will-change: transform;
    transform: translateZ(0);
}

/* Optimize Images */
.profile-photo,
.service-icon,
.expertise-icon {
    image-rendering: optimizeQuality;
}

/* Loading States */
.loading {
    opacity: 0.7;
    pointer-events: none;
}

.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* ==========================================
   BROWSER-SPECIFIC FIXES
   ========================================== */

/* Safari Fixes */
@supports (-webkit-appearance: none) {
    .hero {
        min-height: -webkit-fill-available;
    }

    .nav-menu {
        height: -webkit-fill-available;
    }
}

/* Firefox Fixes */
@-moz-document url-prefix() {
    .gradient-text {
        background: var(--primary-blue);
        color: var(--primary-blue);
    }
}

/* Internet Explorer 11 Fixes */
@media screen and (-ms-high-contrast: active), (-ms-high-contrast: none) {
    .hero-content,
    .about-content,
    .contact-content {
        display: block;
    }

    .services-grid,
    .testimonials-grid {
        display: block;
    }

    .service-card,
    .testimonial-card {
        display: inline-block;
        width: 48%;
        vertical-align: top;
        margin: 1%;
    }
}

/* ==========================================
   DARK MODE SUPPORT (Optional)
   ========================================== */
@media (prefers-color-scheme: dark) {
    :root {
        --white: #1A1A1A;
        --light-gray: #2D2D2D;
        --medium-gray: #B8BCC8;
        --dark-gray: #FFFFFF;
        --black: #FFFFFF;
    }

    .header {
        background: rgba(26, 26, 26, 0.95);
        border-bottom-color: rgba(255, 255, 255, 0.1);
    }

    .hero {
        background: linear-gradient(135deg, #1e3a5f 0%, #2d4a3a 100%);
    }

    .service-card,
    .testimonial-card,
    .contact-form-container {
        background: var(--light-gray);
        color: var(--medium-gray);
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
        background: var(--white);
        border-color: #404040;
        color: var(--medium-gray);
    }
}