/* ===================================
   CSS Variables & Theme Configuration
   =================================== */

:root {
    /* Light Mode Colors */
    --bg-primary: #F8F9FA;
    --bg-secondary: #ffeab9;
    --bg-tertiary: #3498DB;
    --text-primary: #2C3E50;
    --text-secondary: #5D6D7E;
    --text-tertiary: #95A5A6;
    --accent-primary: #3498DB;
    --accent-secondary: #5DADE2;
    --accent-highlight: #2ECC71;
    --border-color: #a9d2f1;
    --shadow-color: rgba(52, 152, 219, 0.08);
    --card-bg: #FFFFFF;
    --nav-bg: rgba(255, 255, 255, 0.98);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;

    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'Courier New', Courier, monospace;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
}

[data-theme="dark"] {
    /* Dark Mode Colors */
    --bg-primary: #000000;
    --bg-secondary: #0a0a0a;
    --bg-tertiary: #87CEEB;
    --text-primary: #FFFFFF;
    --text-secondary: #B0B0B0;
    --text-tertiary: #808080;
    --accent-primary: #87CEEB;
    --accent-secondary: #A0D8F0;
    --accent-highlight: #87CEEB;
    --border-color: #1a1a1a;
    --shadow-color: rgba(135, 206, 235, 0.1);
    --card-bg: #0f0f0f;
    --nav-bg: rgba(10, 10, 10, 0.98);
}

/* ===================================
   Global Styles & Reset
   =================================== */

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color var(--transition-normal), color var(--transition-normal);
    overflow-x: hidden;
}

/* ===================================
   Typography
   =================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: 3rem;
}

h2 {
    font-size: 2.5rem;
}

h3 {
    font-size: 1.75rem;
}

h4 {
    font-size: 1.5rem;
}

h5 {
    font-size: 1.25rem;
}

h6 {
    font-size: 1rem;
}

p {
    margin-bottom: var(--spacing-sm);
}

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

a:hover {
    color: var(--accent-secondary);
}

/* ===================================
   Utility Classes
   =================================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section {
    padding: var(--spacing-2xl) 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: var(--spacing-xl);
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-highlight));
    border-radius: 2px;
}

/* Fade-in Animation */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===================================
   Navigation Bar
   =================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--nav-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px var(--shadow-color);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-lg);
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo-accent {
    color: var(--accent-primary);
    margin-left: 4px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.nav-link {
    color: var(--text-primary);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.nav-link:hover {
    color: var(--accent-primary);
    background-color: var(--bg-secondary);
}

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

.theme-toggle,
.mobile-toggle {
    background: transparent;
    border: 2px solid var(--border-color);
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    color: var(--text-primary);
}

.theme-toggle:hover,
.mobile-toggle:hover {
    background-color: var(--bg-secondary);
    border-color: var(--accent-primary);
    transform: scale(1.05);
}

.theme-icon {
    font-size: 1.25rem;
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
}

.hamburger {
    width: 20px;
    height: 2px;
    background-color: var(--text-primary);
    transition: all var(--transition-fast);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--nav-bg);
        backdrop-filter: blur(10px);
        padding: var(--spacing-lg);
        gap: var(--spacing-sm);
        transform: translateX(100%);
        transition: transform var(--transition-normal);
        box-shadow: 0 10px 30px var(--shadow-color);
    }

    .nav-links.active {
        transform: translateX(0);
    }

    .mobile-toggle {
        display: flex;
    }

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

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

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

/* ===================================
   Hero Section
   =================================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at top right, var(--accent-primary)10, transparent 50%);
    opacity: 0.1;
    pointer-events: none;
}

.hero-container {
    position: relative;
    z-index: 1;
}

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

.hero-text {
    animation: fadeInUp 0.8s ease;
}

.hero-greeting {
    font-size: 1.25rem;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.hero-name {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--text-primary), var(--accent-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-title {
    font-size: 1.75rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.btn {
    padding: 0.875rem 2rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-highlight));
    color: white;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(52, 152, 219, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--accent-primary);
    border: 2px solid var(--accent-primary);
}

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

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

.social-link {
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: white;
    transform: translateY(-3px);
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.image-wrapper {
    position: relative;
    width: 420px;
    height: 420px;
    border-radius: 50%;
    overflow: hidden;
    border: 6px solid var(--accent-primary);
    box-shadow: 0 20px 60px var(--shadow-color);
    animation: float 3s ease-in-out infinite;
}

.profile-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    /* Move image down so the head is not cut */
    border-radius: 50%;
    display: block;
}


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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-20px);
    }
}

@media (max-width: 768px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-name {
        font-size: 2.5rem;
    }

    .hero-cta {
        flex-direction: column;
    }

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

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

/* ===================================
   About Section
   =================================== */

.about-section {
    background-color: var(--bg-secondary);
}

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

.about-text {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.about-text strong {
    color: var(--accent-primary);
    font-weight: 600;
}

/* ===================================
   Skills Section
   =================================== */

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

.skill-category {
    background: var(--card-bg);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 20px var(--shadow-color);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    border: 1px solid var(--border-color);
}

.skill-category:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px var(--shadow-color);
}

.skill-category-title {
    color: var(--accent-primary);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
    font-weight: 600;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.skill-tag {
    background: linear-gradient(135deg, var(--accent-primary)15, var(--accent-secondary)10);
    color: var(--accent-primary);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid var(--accent-primary)30;
    transition: all var(--transition-fast);
    cursor: default;
}

.skill-tag:hover {
    background: var(--accent-primary);
    color: white;
    transform: scale(1.05);
}

/* ===================================
   Projects Section
   =================================== */

.projects-section {
    background-color: var(--bg-secondary);
}

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

.project-card {
    background: var(--card-bg);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 20px var(--shadow-color);
    transition: all var(--transition-fast);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px var(--shadow-color);
    border-color: var(--accent-primary);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
}

.project-title {
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    flex: 1;
}

.project-badge {
    background: var(--accent-primary)20;
    color: var(--accent-primary);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    white-space: nowrap;
    margin-left: var(--spacing-sm);
}

.project-link {
    color: var(--accent-primary);
    transition: all var(--transition-fast);
}

.project-link:hover {
    color: var(--accent-highlight);
    transform: scale(1.1);
}

.project-description {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
    flex: 1;
}

.project-description strong {
    color: var(--accent-primary);
    font-weight: 600;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.tech-tag {
    background: var(--bg-primary);
    color: var(--text-secondary);
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.813rem;
    border: 1px solid var(--border-color);
}

.project-footer {
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.project-highlight {
    color: var(--accent-highlight);
    font-weight: 600;
    font-size: 0.875rem;
}

/* ===================================
   Experience Section
   =================================== */

.experience-timeline {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.experience-card {
    background: var(--card-bg);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 20px var(--shadow-color);
    border-left: 4px solid var(--accent-primary);
    transition: all var(--transition-fast);
}

.experience-card:hover {
    transform: translateX(8px);
    box-shadow: 0 8px 30px var(--shadow-color);
}

.experience-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.experience-title {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.experience-company {
    color: var(--accent-primary);
    font-size: 1.125rem;
    font-weight: 600;
}

.experience-date {
    color: var(--text-tertiary);
    font-size: 0.938rem;
    font-weight: 500;
    white-space: nowrap;
}

.experience-list {
    list-style: none;
    padding-left: 0;
}

.experience-list li {
    padding-left: 1.5rem;
    margin-bottom: var(--spacing-sm);
    position: relative;
    color: var(--text-secondary);
    line-height: 1.7;
}

.experience-list li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
    font-weight: bold;
    font-size: 1.25rem;
}

/* ===================================
   Education Section
   =================================== */

.education-section {
    background-color: var(--bg-secondary);
}

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

.education-card {
    background: var(--card-bg);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 20px var(--shadow-color);
    text-align: center;
    transition: all var(--transition-fast);
    border: 1px solid var(--border-color);
}

.education-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px var(--shadow-color);
}

.education-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.education-degree {
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.education-school {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.5;
}

.education-details {
    display: flex;
    justify-content: space-between;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
    font-size: 0.875rem;
}

.education-date {
    color: var(--text-tertiary);
}

.education-grade {
    color: var(--accent-primary);
    font-weight: 600;
}

/* ===================================
   Certifications Section
   =================================== */

.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-md);
}

.certification-card {
    background: var(--card-bg);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 20px var(--shadow-color);
    border-left: 4px solid var(--accent-highlight);
    transition: all var(--transition-fast);
}

.certification-card:hover {
    transform: translateX(8px);
    box-shadow: 0 8px 30px var(--shadow-color);
}

.cert-badge {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-highlight));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
}

.cert-title {
    font-size: 1.125rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.cert-skills {
    color: var(--text-secondary);
    font-size: 0.938rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
}

.cert-date {
    color: var(--accent-primary);
    font-size: 0.875rem;
    font-weight: 600;
}

/* ===================================
   Publications & Patents Section
   =================================== */

.publications-section {
    background-color: var(--bg-secondary);
}

.publication-category {
    margin-bottom: var(--spacing-xl);
}

.publication-category:last-child {
    margin-bottom: 0;
}

.pub-category-title {
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--border-color);
}

.publication-card {
    background: var(--card-bg);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 20px var(--shadow-color);
    margin-bottom: var(--spacing-md);
    display: flex;
    gap: var(--spacing-md);
    transition: all var(--transition-fast);
    border: 1px solid var(--border-color);
}

.publication-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px var(--shadow-color);
}

.patent-card {
    border-left: 4px solid var(--accent-highlight);
}

.pub-icon {
    font-size: 2.5rem;
    flex-shrink: 0;
}

.pub-content {
    flex: 1;
}

.pub-title {
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.pub-authors,
.pub-venue {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    font-size: 1rem;
}

.pub-details {
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

.pub-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    align-items: center;
    margin-top: var(--spacing-sm);
}

.pub-link {
    color: var(--accent-primary);
    font-weight: 500;
    text-decoration: underline;
}

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

.pub-date {
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

.pub-status {
    background: var(--accent-primary)20;
    color: var(--accent-primary);
    padding: 0.375rem 0.875rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
}

/* ===================================
   Blog Section
   =================================== */

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.blog-card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 4px 20px var(--shadow-color);
    transition: all var(--transition-fast);
    border: 1px solid var(--border-color);
}

.blog-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px var(--shadow-color);
}

.blog-image {
    height: 200px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    display: flex;
    align-items: center;
    justify-content: center;
}

.blog-placeholder {
    color: white;
    opacity: 0.8;
}

.blog-content {
    padding: var(--spacing-lg);
}

.blog-date {
    color: var(--accent-primary);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.blog-title {
    font-size: 1.25rem;
    color: var(--text-primary);
    margin: var(--spacing-sm) 0;
    line-height: 1.4;
}

.blog-excerpt {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.blog-link {
    color: var(--accent-primary);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all var(--transition-fast);
}

.blog-link:hover {
    color: var(--accent-highlight);
    gap: 0.75rem;
}

/* ===================================
   Contact Section
   =================================== */

.contact-section {
    background-color: var(--bg-secondary);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-xl);
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.contact-text {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--text-secondary);
}

.contact-item svg {
    flex-shrink: 0;
    color: var(--accent-primary);
}

.contact-item a {
    color: var(--text-primary);
    transition: color var(--transition-fast);
}

.contact-item a:hover {
    color: var(--accent-primary);
}

.contact-form {
    background: var(--card-bg);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 20px var(--shadow-color);
    border: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
    font-weight: 600;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.875rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-primary)20;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-message {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    display: none;
    font-weight: 500;
}

.form-message.success {
    display: block;
    background: var(--accent-highlight)20;
    color: var(--accent-highlight);
    border: 1px solid var(--accent-highlight);
}

.form-message.error {
    display: block;
    background: #e7484820;
    color: #e74848;
    border: 1px solid #e74848;
}

@media (max-width: 768px) {
    .contact-content {
        grid-template-columns: 1fr;
    }
}

/* ===================================
   Footer
   =================================== */

.footer {
    background: var(--bg-secondary);
    padding: var(--spacing-lg) 0;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-text {
    color: var(--text-secondary);
    font-size: 0.938rem;
}

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

.footer-social a {
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.footer-social a:hover {
    color: var(--accent-primary);
    transform: scale(1.1);
}

@media (max-width: 768px) {
    .footer-content {
        justify-content: center;
        text-align: center;
    }
}

/* ===================================
   Responsive Typography
   =================================== */

@media (max-width: 768px) {
    html {
        font-size: 14px;
    }

    h1 {
        font-size: 2.5rem;
    }

    h2 {
        font-size: 2rem;
    }

    h3 {
        font-size: 1.5rem;
    }

    .section {
        padding: var(--spacing-xl) 0;
    }

    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }

    .projects-grid,
    .skills-grid,
    .education-grid,
    .certifications-grid,
    .blog-grid {
        grid-template-columns: 1fr;
    }
}