/* ============================================
   Design System - CSS Variables
   ============================================ */
:root {
    /* Colors */
    --color-primary: #1B1F3B;
    --color-accent: #3D8BFF;
    --color-accent-hover: #2B7CE8;
    --color-accent-alt: #FFD166;
    --color-surface: #F8FAFC;
    --color-border: #E2E8F0;
    --color-muted: #64748B;
    --color-text: #0F172A;
    --color-text-muted: #475569;
    
    /* Dark Mode Colors */
    --color-bg-dark: #0B1B2E;
    --color-card-dark: #152B46;
    --color-text-light: #FFFFFF;
    --color-text-light-muted: #9DAEC7;
    
    /* Spacing Scale (8px base) */
    --space-1: 8px;
    --space-2: 12px;
    --space-3: 16px;
    --space-4: 24px;
    --space-5: 32px;
    --space-6: 48px;
    --space-7: 64px;
    --space-8: 96px;
    
    /* Typography */
    --font-heading: 'Poppins', system-ui, sans-serif;
    --font-body: 'Inter', system-ui, sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    --font-size-3xl: 36px;
    --font-size-4xl: 48px;
    
    /* Borders & Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Container */
    --container-max: 1280px;
    --container-gutter: 24px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg-dark);
    color: var(--color-text-light);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* Performance optimizations */
.skill-icon-img,
.cluster-icon {
    will-change: transform;
}

.skill-card,
.skill-cluster,
.project-card,
.service-card {
    will-change: transform;
}

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

ul, ol {
    list-style: none;
}

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

/* ============================================
   Container & Grid
   ============================================ */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-gutter);
}

section {
    padding: var(--space-8) 0;
}

@media (max-width: 768px) {
    section {
        padding: var(--space-7) 0;
    }
}

/* ============================================
   Typography
   ============================================ */
.section-label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-accent);
    letter-spacing: 1.5px;
    text-transform: uppercase;
    margin-bottom: var(--space-3);
}

.section-title {
    font-family: var(--font-heading);
    font-size: var(--font-size-3xl);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-5);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-light-muted);
    margin-bottom: var(--space-6);
}

@media (max-width: 768px) {
    .section-title {
        font-size: var(--font-size-2xl);
    }
}

/* ============================================
   Buttons
   ============================================ */
.btn-primary, .btn-ghost {
    display: inline-block;
    padding: 12px var(--space-4);
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-hover));
    color: #FFFFFF;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-accent-hover), #1B3FB8);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(61, 139, 255, 0.3);
}

.btn-large {
    padding: 16px var(--space-5);
    font-size: var(--font-size-lg);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-light);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-2px);
}

/* ============================================
   Header & Navigation
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(11, 27, 46, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: var(--space-3) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

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

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

.logo-link {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-hover));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--font-size-lg);
    color: #FFFFFF;
}

.icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.logo-text {
    font-weight: 700;
    font-size: var(--font-size-lg);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-5);
}

.nav-link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-light-muted);
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-accent);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-accent);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 32px;
    height: 32px;
    padding: 0;
}

.hamburger-line {
    width: 100%;
    height: 3px;
    background: var(--color-text-light);
    border-radius: 3px;
    transition: all 0.3s ease;
}

.mobile-menu-toggle.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

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

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

/* ============================================
   Hero Section
   ============================================ */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, var(--color-bg-dark), #11253D);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
    align-items: center;
}

.hero-content {
    animation: fadeUp 0.8s ease-out;
}

.hero-label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-accent);
    letter-spacing: 1.5px;
    text-transform: uppercase;
    margin-bottom: var(--space-3);
}

.hero-title {
    font-family: var(--font-heading);
    font-size: var(--font-size-4xl);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--space-5);
    text-align: center;
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-light-muted);
    margin-bottom: var(--space-5);
    max-width: 540px;
    text-align: center;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
    justify-content: center;
}

.hero-photo {
    animation: fadeUp 0.8s ease-out 0.2s both;
}

.photo-card {
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
    background: linear-gradient(135deg, #152B46, #1E3A5F);
    border-radius: var(--radius-xl);
    padding: 8px;
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.photo-img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    aspect-ratio: 3 / 4;
    object-fit: cover;
    background: #2a3f5f;
}

.social-icons {
    display: flex;
    gap: var(--space-3);
    justify-content: center;
}

.social-icon {
    width: 44px;
    height: 44px;
    border: 2px solid var(--color-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
    transition: all 0.3s ease;
}

.social-icon:hover {
    background: var(--color-accent);
    color: #FFFFFF;
    transform: translateY(-2px);
}

/* ============================================
   Stats Section
   ============================================ */
.stats {
    background: rgba(21, 43, 70, 0.5);
    padding: var(--space-6) 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.stat-card {
    text-align: center;
    padding: var(--space-5);
}

.stat-number {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: var(--space-2);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-light-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ============================================
   About Section
   ============================================ */
.about {
    background: var(--color-bg-dark);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--space-8);
    align-items: center;
}

.about-photo {
    justify-self: center;
}

.about-content {
    animation: fadeUp 0.8s ease-out;
}

.about-description {
    font-size: var(--font-size-base);
    color: var(--color-text-light-muted);
    line-height: 1.8;
    margin-bottom: var(--space-4);
}

.about-description:last-of-type {
    margin-bottom: var(--space-6);
}

/* ============================================
   Skills Section
   ============================================ */
.skills {
    background: linear-gradient(135deg, #11253D, #0F1C2E);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-8);
}

/* Skills Wrapper */
.skills-wrapper {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.skills-row {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--space-6);
    align-items: start;
}

.skills-col {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    transition: all 0.3s ease;
}

.skills-col:hover {
    border-color: rgba(61, 139, 255, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(61, 139, 255, 0.1);
}

.skills-col-full {
    grid-column: 1 / -1;
}

.skills-divider-vertical {
    width: 2px;
    background: linear-gradient(to bottom, transparent, rgba(61, 139, 255, 0.3), transparent);
    align-self: stretch;
}

/* Skills Section Headers */
.skills-section-header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.skills-icon-circle {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-hover));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #FFFFFF;
    font-size: var(--font-size-lg);
}

.skills-section-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: #FFFFFF;
}

.skills-section-group {
    margin-bottom: var(--space-5);
}

.skills-section-group:last-child {
    margin-bottom: 0;
}

/* Skills Content */
.skills-period {
    font-size: var(--font-size-sm);
    color: var(--color-accent);
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.skills-desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-light-muted);
    line-height: 1.6;
}

.skills-subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-text-light-muted);
    margin-bottom: var(--space-5);
    line-height: 1.6;
}

/* Skills Lists */
.skills-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.skills-list li {
    font-size: var(--font-size-sm);
    color: var(--color-text-light-muted);
    padding: var(--space-2) 0;
    padding-left: var(--space-5);
    position: relative;
    line-height: 1.5;
}

.skills-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-accent-alt);
    font-weight: 600;
}

/* Tech Skills Grid */
.tech-skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-4);
}

.tech-skill-pill {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    transition: all 0.3s ease;
}

.tech-skill-pill:hover {
    background: rgba(61, 139, 255, 0.1);
    border-color: rgba(61, 139, 255, 0.3);
    transform: translateY(-2px);
}

.tech-icon-img {
    width: 32px;
    height: 32px;
    object-fit: contain;
    flex-shrink: 0;
}

.tech-pill-content {
    flex: 1;
}

.tech-pill-name {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: #FFFFFF;
    margin-bottom: var(--space-1);
}

.tech-pill-sub {
    font-size: var(--font-size-xs);
    color: var(--color-text-light-muted);
    line-height: 1.4;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .skills-row {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    .skills-divider-vertical {
        display: none;
    }
    
    .tech-skills-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 768px) {
    .skills-col {
        padding: var(--space-4);
    }
    
    .tech-skills-grid {
        grid-template-columns: 1fr;
    }
    
    .tech-skill-pill {
        padding: var(--space-3);
    }
}

@media (max-width: 480px) {
    .skills-wrapper {
        gap: var(--space-4);
    }
    
    .skills-col {
        padding: var(--space-3);
    }
    
    .skills-icon-circle {
        width: 32px;
        height: 32px;
        font-size: var(--font-size-base);
    }
    
    .skills-section-title {
        font-size: var(--font-size-base);
    }
}

/* ============================================
   Projects Section
   ============================================ */
.projects {
    background: var(--color-bg-dark);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-5);
}

.project-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.3s ease;
}

.project-card:hover {
    transform: translateY(-8px);
    border-color: rgba(61, 139, 255, 0.3);
    box-shadow: 0 20px 40px rgba(61, 139, 255, 0.15);
}

.project-thumbnail {
    height: 200px;
    background: linear-gradient(135deg, #2a3f5f, #1e3a5f);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.thumbnail-icon {
    font-size: 48px;
    color: var(--color-accent);
    margin-bottom: var(--space-3);
}

.thumbnail-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--space-1);
}

.thumbnail-subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-text-light-muted);
}

.project-info {
    padding: var(--space-5);
}

.project-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--space-3);
}

.project-impact {
    margin-bottom: var(--space-4);
}

.project-impact li {
    font-size: var(--font-size-sm);
    color: var(--color-text-light-muted);
    padding: var(--space-1) 0;
    padding-left: var(--space-5);
    position: relative;
}

.project-impact li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-accent-alt);
    font-weight: 600;
}

.project-stack {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.stack-chip {
    background: rgba(37, 99, 235, 0.1);
    color: var(--color-accent);
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 500;
    border: 1px solid rgba(37, 99, 235, 0.2);
}

.project-link {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-accent);
    transition: all 0.3s ease;
    display: inline-block;
}

.project-link:hover {
    transform: translateX(4px);
}

/* ============================================
   Services Section
   ============================================ */
.services {
    background: linear-gradient(135deg, #11253D, #0F1C2E);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-5);
}

.service-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    text-align: center;
    transition: all 0.3s ease;
}

.service-card:hover {
    transform: translateY(-4px);
    border-color: rgba(61, 139, 255, 0.3);
    box-shadow: 0 15px 30px rgba(61, 139, 255, 0.1);
}

.service-icon {
    font-size: 48px;
    color: var(--color-accent);
    margin-bottom: var(--space-4);
}

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

.service-outcomes {
    text-align: left;
}

.service-outcomes li {
    font-size: var(--font-size-sm);
    color: var(--color-text-light-muted);
    padding: var(--space-2) 0;
    padding-left: var(--space-5);
    position: relative;
}

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

/* ============================================
   Contact Section
   ============================================ */
.contact {
    background: var(--color-bg-dark);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.form-group label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-light);
}

.form-group span {
    color: var(--color-accent);
}

.form-group input,
.form-group textarea {
    padding: 12px var(--space-3);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: var(--color-text-light);
    font-family: inherit;
    font-size: var(--font-size-base);
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-message {
    padding: var(--space-3);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    transition: all 0.3s ease;
}

.form-message.success {
    background: rgba(34, 197, 94, 0.1);
    color: var(--color-accent-alt);
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

.contact-item {
    display: flex;
    gap: var(--space-4);
    align-items: flex-start;
}

.contact-icon {
    width: 44px;
    height: 44px;
    background: rgba(37, 99, 235, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: var(--font-size-lg);
    color: var(--color-accent);
}

.contact-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-light-muted);
    margin-bottom: var(--space-1);
}

.contact-link {
    font-size: var(--font-size-base);
    color: var(--color-text-light);
    transition: color 0.3s ease;
}

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

/* ============================================
   Footer
   ============================================ */
.footer {
    background: rgba(21, 43, 70, 0.5);
    padding: var(--space-7) 0 var(--space-4);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
    margin-bottom: var(--space-6);
}

.footer-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--space-4);
}

.footer-nav {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.footer-nav a {
    font-size: var(--font-size-sm);
    color: var(--color-text-light-muted);
    transition: color 0.3s ease;
}

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

.social-links {
    display: flex;
    gap: var(--space-3);
}

.social-links a {
    width: 40px;
    height: 40px;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-light-muted);
    transition: all 0.3s ease;
}

.social-links a:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    transform: translateY(-2px);
}

.copyright {
    text-align: center;
    padding-top: var(--space-5);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--color-text-light-muted);
    font-size: var(--font-size-sm);
}

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

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: rgba(11, 27, 46, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        align-items: flex-start;
        padding: 80px var(--space-5);
        gap: var(--space-4);
        transition: right 0.3s ease;
        z-index: 1000;
        box-shadow: -5px 0 25px rgba(0, 0, 0, 0.5);
    }
    
    .nav-links.active {
        right: 0;
    }
    
    .nav-link {
        font-size: var(--font-size-base);
        width: 100%;
        padding: var(--space-2) 0;
    }
    
    .nav-cta {
        width: 100%;
        text-align: center;
        margin-top: var(--space-4);
    }
    
    body.menu-open {
        overflow: hidden;
    }
    
    body.menu-open::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.5);
        z-index: 999;
    }
    
    .hero-grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
        text-align: center;
    }
    
    .hero-description {
        text-align: center;
    }
    
    .hero-actions {
        flex-direction: column;
        gap: var(--space-3);
    }
    
    .hero-actions .btn-large {
        width: 100%;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }
    
    .skills-cluster-grid {
        grid-template-columns: 1fr;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: var(--font-size-2xl);
    }
    
    .section-title {
        font-size: var(--font-size-xl);
    }
    
    .photo-card {
        max-width: 300px;
    }
    
    .skill-card {
        padding: var(--space-4);
    }
    
    .skill-icon-img {
        width: 40px;
        height: 40px;
    }
}

@media (max-width: 390px) {
    .hero-title {
        font-size: var(--font-size-xl);
    }
    
    .skill-card {
        padding: var(--space-3);
    }
    
    .container {
        padding: 0 var(--space-3);
    }
}

@media (max-width: 320px) {
    .hero-title {
        font-size: var(--font-size-lg);
    }
    
    .section-title {
        font-size: var(--font-size-lg);
    }
}

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

/* Focus states for accessibility */
.nav-link:focus-visible,
.btn-primary:focus-visible,
.btn-ghost:focus-visible,
.social-icon:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}