/* ===== CSS Variables - Light Theme ===== */
:root {
    --primary-color: #0176D3;
    --primary-dark: #014486;
    --primary-light: #1589EE;
    --accent-color: #0176D3;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.1);
}

/* ===== CSS Variables - Dark Theme (Default) ===== */
[data-theme="dark"] {
    --primary-color: #0176D3;
    --primary-dark: #014486;
    --primary-light: #1589EE;
    --accent-color: #0176D3;
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --bg-primary: #111827;
    --bg-secondary: #1f2937;
    --bg-tertiary: #374151;
    --border-color: #374151;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.5);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    perspective: 1000px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* Default to dark theme */
html {
    color-scheme: dark;
}

/* Ensure all decorative Font Awesome icons use Salesforce blue */
.skill-icon,
.skill-icon .fas,
.skill-icon .fab,
.cert-icon,
.cert-icon .fas,
.cert-icon .fab,
.cert-icon .fa,
.project-icon,
.project-icon .fas,
.contact-item i {
    color: var(--primary-color);
}

html:not([data-theme]) {
    --primary-color: #0176D3;
    --primary-dark: #014486;
    --primary-light: #1589EE;
    --accent-color: #0176D3;
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --bg-primary: #111827;
    --bg-secondary: #1f2937;
    --bg-tertiary: #374151;
    --border-color: #374151;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.5);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(17, 24, 39, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    box-shadow: var(--shadow-sm);
    transition: all 0.6s ease-in-out;
}

[data-theme="light"] .navbar {
    background: rgba(255, 255, 255, 0.95);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.6s ease-in-out;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.6s ease-in-out;
}

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

.nav-link:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.bar {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    transition: all 0.6s ease-in-out;
    border-radius: 2px;
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8rem 2rem 4rem;
    background: linear-gradient(135deg, #1f2937 0%, #111827 100%);
}

[data-theme="light"] .hero {
    background: linear-gradient(135deg, #f9fafb 0%, #ffffff 100%);
}

.hero-content {
    max-width: 800px;
    text-align: center;
    animation: fadeInUp 1.5s ease-out;
}

.hero-greeting {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    font-weight: 400;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-family: 'Poppins', sans-serif;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.8;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.btn {
    padding: 0.875rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.6s ease-in-out;
    display: inline-block;
    border: 2px solid transparent;
    font-size: 1rem;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-md);
    transform-style: preserve-3d;
    transition: transform 0.8s cubic-bezier(0.4, 0, 0.2, 1), background 0.8s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: transform;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translate3d(0, -5px, 0) scale(1.05);
    box-shadow: 0 10px 25px rgba(1, 118, 211, 0.4), 0 0 20px rgba(1, 118, 211, 0.2);
}

.btn-primary:active {
    transform: translate3d(0, -2px, 0) scale(1.02);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
    transform-style: preserve-3d;
    transition: transform 0.8s cubic-bezier(0.4, 0, 0.2, 1), background 0.8s cubic-bezier(0.4, 0, 0.2, 1), color 0.8s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: transform;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translate3d(0, -5px, 0) scale(1.05) rotateX(5deg);
    box-shadow: 0 10px 25px rgba(1, 118, 211, 0.3);
}

.btn-secondary:active {
    transform: translate3d(0, -2px, 0) scale(1.02);
}

.hero-social {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.social-link {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    text-decoration: none;
    transition: transform 0.9s cubic-bezier(0.4, 0, 0.2, 1), background 0.9s cubic-bezier(0.4, 0, 0.2, 1), color 0.9s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.9s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid var(--border-color);
    transform-style: preserve-3d;
    will-change: transform;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

.social-link:hover {
    background: var(--primary-color);
    color: white;
    transform: translate3d(0, -8px, 0) rotateY(360deg) scale(1.15);
    box-shadow: 0 10px 25px rgba(1, 118, 211, 0.4), 0 0 20px rgba(1, 118, 211, 0.2);
}

/* ===== Section Styles ===== */
section {
    padding: 5rem 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-primary);
    font-family: 'Poppins', sans-serif;
}

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

.about-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 4rem;
    align-items: center;
    max-width: 1000px;
    margin: 0 auto;
}

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

.profile-image-container {
    position: relative;
    width: 100%;
    max-width: 350px;
    aspect-ratio: 1;
    border-radius: 50%;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: transform 1.1s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 1.1s cubic-bezier(0.4, 0, 0.2, 1);
    transform-style: preserve-3d;
    perspective: 1000px;
    will-change: transform;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

.profile-image-container img {
    display: block !important;
    opacity: 1 !important;
    visibility: visible !important;
}

[data-theme="dark"] .profile-image-container img {
    display: block !important;
    opacity: 1 !important;
    visibility: visible !important;
}

.profile-image-container:hover {
    transform: translate3d(0, -10px, 0) rotateY(5deg) scale(1.05);
    box-shadow: 0 25px 50px rgba(1, 118, 211, 0.3), 0 0 40px rgba(1, 118, 211, 0.2);
}

.profile-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    display: block !important;
    opacity: 1 !important;
    visibility: visible !important;
}

.profile-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
    color: white;
    border-radius: 50%;
}

.profile-frame {
    display: none;
}

.about-text p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.stat-card {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 16px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: transform 0.9s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.9s cubic-bezier(0.4, 0, 0.2, 1), border-color 0.9s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border-color);
    transform-style: preserve-3d;
    perspective: 1000px;
    will-change: transform;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

.stat-card:hover {
    transform: translate3d(0, -10px, 0) rotateX(5deg) scale(1.05);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ===== Skills Section ===== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.skill-card {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    transition: transform 0.9s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.9s cubic-bezier(0.4, 0, 0.2, 1), border-color 0.9s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border-color);
    text-align: center;
    transform-style: preserve-3d;
    perspective: 1000px;
    will-change: transform;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

.skill-card:hover {
    transform: translate3d(0, -12px, 0) rotateX(5deg) scale(1.05);
    box-shadow: 0 15px 35px rgba(1, 118, 211, 0.2), 0 5px 15px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-color);
}

.skill-card:hover .skill-icon {
    transform: rotateY(360deg) scale3d(1.15, 1.15, 1);
}

.skill-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    transition: transform 1.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-block;
    transform-style: preserve-3d;
    will-change: transform;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

.skill-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.skill-list {
    list-style: none;
    text-align: left;
}

.skill-list li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: 1.5rem;
}

.skill-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 600;
}

/* ===== Certifications Section ===== */
.certifications {
    background: var(--bg-primary);
}

.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
}

.certification-card {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    transition: transform 1.1s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 1.1s cubic-bezier(0.4, 0, 0.2, 1), border-color 1.1s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border-color);
    text-align: center;
    transform-style: preserve-3d;
    perspective: 1000px;
    position: relative;
    overflow: hidden;
    will-change: transform;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

.certification-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(1, 118, 211, 0.1), transparent);
    transition: left 1.2s ease-in-out;
}

.certification-card:hover::before {
    left: 100%;
}

.certification-card:hover {
    transform: translate3d(0, -15px, 0) rotateY(5deg) rotateX(-5deg) scale(1.08);
    box-shadow: 0 20px 40px rgba(1, 118, 211, 0.3), 0 0 30px rgba(1, 118, 211, 0.1);
    border-color: var(--primary-color);
}

.certification-card:hover .cert-icon {
    transform: rotateY(360deg) scale3d(1.2, 1.2, 1);
    color: var(--primary-color);
}

.certification-card:hover .cert-title {
    transform: translateZ(20px);
    color: var(--primary-color);
}

.cert-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    transition: transform 1.3s cubic-bezier(0.4, 0, 0.2, 1), color 1.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-block;
    transform-style: preserve-3d;
    will-change: transform;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

.cert-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    line-height: 1.4;
    transition: all 0.9s ease-in-out;
    transform-style: preserve-3d;
}

.cert-issuer {
    font-size: 0.95rem;
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.cert-date {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.cert-id {
    font-size: 0.8rem;
    color: var(--text-secondary);
    opacity: 0.7;
    font-family: 'Courier New', monospace;
}

/* ===== Experience Section ===== */
.experience {
    background: var(--bg-secondary);
}

.experience-timeline {
    max-width: 1000px;
    margin: 0 auto;
    position: relative;
    padding-left: 180px;
}

.experience-timeline::before {
    content: '';
    position: absolute;
    left: 80px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

.experience-item {
    position: relative;
    padding-left: 0;
    margin-bottom: 3rem;
}

.experience-item::before {
    content: '';
    position: absolute;
    left: 74px;
    top: 0.75rem;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--primary-color);
    border: 3px solid var(--bg-secondary);
    z-index: 1;
}

.experience-date {
    position: absolute;
    left: -180px;
    top: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
    white-space: nowrap;
    width: 160px;
    text-align: right;
    padding-right: 1rem;
    line-height: 1.4;
}

.experience-content {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: transform 0.9s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.9s cubic-bezier(0.4, 0, 0.2, 1), border-color 0.9s cubic-bezier(0.4, 0, 0.2, 1);
    transform-style: preserve-3d;
    perspective: 1000px;
    will-change: transform;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

.experience-content:hover {
    box-shadow: 0 15px 35px rgba(1, 118, 211, 0.2), 0 5px 15px rgba(0, 0, 0, 0.1);
    transform: translate3d(10px, 0, 0) rotateY(-2deg) scale(1.02);
    border-color: var(--primary-color);
}

.experience-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.experience-company {
    font-size: 1.1rem;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
    font-weight: 500;
}

.experience-location {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.experience-details {
    list-style: none;
    margin-top: 1rem;
}

.experience-details li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: 1.5rem;
    line-height: 1.6;
}

.experience-details li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 600;
}

/* ===== Projects Section ===== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    transition: transform 0.9s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.9s cubic-bezier(0.4, 0, 0.2, 1), border-color 0.9s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border-color);
    transform-style: preserve-3d;
    perspective: 1000px;
    position: relative;
    overflow: hidden;
    will-change: transform;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

.project-card::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(1, 118, 211, 0.1) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    transition: width 1.3s ease-in-out, height 1.3s ease-in-out;
}

.project-card:hover::after {
    width: 300px;
    height: 300px;
}

.project-card:hover {
    transform: translate3d(0, -12px, 0) rotateY(-5deg) rotateX(5deg) scale(1.05);
    box-shadow: 0 20px 40px rgba(1, 118, 211, 0.25), 0 0 30px rgba(1, 118, 211, 0.1);
    border-color: var(--primary-color);
}

.project-card:hover .project-icon {
    transform: rotateY(360deg) scale3d(1.2, 1.2, 1);
}

.project-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    transition: transform 1.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-block;
    transform-style: preserve-3d;
    position: relative;
    z-index: 1;
    will-change: transform;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

.project-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.project-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.project-tags span {
    padding: 0.4rem 1rem;
    background: var(--bg-secondary);
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--primary-color);
    border: 1px solid var(--border-color);
}

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

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-description {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 2rem;
    line-height: 1.8;
}

.contact-details {
    margin-bottom: 2rem;
}

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

.contact-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-top: 0.25rem;
}

.contact-item h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.contact-item p,
.contact-item a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.6s ease-in-out;
}

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

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

.social-btn {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    text-decoration: none;
    transition: transform 0.9s cubic-bezier(0.4, 0, 0.2, 1), background 0.9s cubic-bezier(0.4, 0, 0.2, 1), color 0.9s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.9s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid var(--border-color);
    will-change: transform;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

.social-btn:hover {
    background: var(--primary-color);
    color: white;
    transform: translate3d(0, -3px, 0);
    box-shadow: var(--shadow-md);
}

.contact-form {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.875rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.6s ease-in-out;
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(1, 118, 211, 0.1);
}

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

/* ===== Footer ===== */
.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    text-align: center;
    color: var(--text-secondary);
}

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

/* ===== Responsive Design ===== */
@media (min-width: 1200px) {
    .experience-timeline {
        padding-left: 200px;
    }

    .experience-timeline::before {
        left: 90px;
    }

    .experience-item::before {
        left: 84px;
        top: 0.75rem;
    }

    .experience-date {
        left: -200px;
        width: 180px;
        top: 0.5rem;
    }
}

@media (max-width: 968px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--bg-primary);
        width: 100%;
        text-align: center;
        transition: 0.6s ease-in-out;
        box-shadow: var(--shadow-lg);
        padding: 2rem 0;
        gap: 1rem;
    }

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

    .theme-toggle-container {
        margin-right: 0.5rem;
    }

    .theme-toggle {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .nav-toggle.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

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

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .about-image-wrapper {
        order: -1;
    }

    .profile-image-container {
        max-width: 280px;
    }

    .about-stats {
        grid-template-columns: 1fr;
    }

    .certifications-grid {
        grid-template-columns: 1fr;
    }

    .experience-timeline {
        padding-left: 0;
    }

    .experience-timeline::before {
        left: 15px;
    }

    .experience-item {
        padding-left: 50px;
    }

    .experience-item::before {
        left: 9px;
    }

    .experience-date {
        position: static;
        margin-bottom: 0.5rem;
        font-weight: 600;
        color: var(--primary-color);
        width: auto;
        text-align: left;
    }
}

@media (max-width: 568px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

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

    .container {
        padding: 0 1rem;
    }

    section {
        padding: 3rem 0;
    }
}