/* Root Variables */
:root {
    --primary-color: #7c3aed;
    --primary-dark: #6d28d9;
    --primary-light: #a78bfa;
    --secondary-color: #ec4899;
    --accent-color: #06b6d4;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #ffffff;
    --bg-gray: #f9fafb;
    --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --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, 0.15);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

/* Dark Theme Variables */
body.dark-theme {
    --text-dark: #f9fafb;
    --text-light: #d1d5db;
    --bg-light: #1f2937;
    --bg-gray: #111827;
    --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);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-light);
    transition: var(--transition);
}

html {
    scroll-behavior: smooth;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background: var(--bg-light);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--text-dark);
}

.logo-icon {
    font-size: 1.5rem;
}

nav {
    display: flex;
    gap: 30px;
}

nav a {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    padding: 8px 16px;
    border-radius: 20px;
}

nav a:hover {
    background: var(--primary-color);
    color: white;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

.social-icon {
    font-size: 1.3rem;
    text-decoration: none;
    transition: var(--transition);
}

.social-icon:hover {
    transform: scale(1.2);
}

.linkedin-icon {
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-image {
    width: 60px;
    height: 60px;
    object-fit: contain;
}

.theme-toggle {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 1rem;
    transition: var(--transition);
}

.theme-toggle:hover {
    background: var(--primary-dark);
    transform: scale(1.05);
}

/* Hero Section */
.hero {
    background: var(--bg-gradient);
    padding: 80px 0;
    color: white;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content {
    animation: fadeInLeft 1s ease-out;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.95;
    line-height: 1.7;
}

.role-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.badge {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: 10px 20px;
    border-radius: 25px;
    font-weight: 600;
    border: 2px solid rgba(255, 255, 255, 0.3);
    transition: var(--transition);
}

.badge:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.hero-image {
    display: flex;
    justify-content: center;
    animation: fadeInRight 1s ease-out;
}

.profile-photo-placeholder {
    width: 400px;
    height: 500px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border-radius: 30px;
    border: 3px dashed rgba(255, 255, 255, 0.4);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 15px;
    transition: var(--transition);
}

.profile-photo-placeholder:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.6);
}

.placeholder-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
}

.placeholder-note {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.8);
    font-style: italic;
}

.profile-photo {
    width: 100%;
    max-width: 400px;
    height: auto;
    border-radius: 30px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    object-fit: cover;
    aspect-ratio: 3 / 4;
    animation: fadeInRight 1s ease-out;
}

/* Expertise Section */
.expertise {
    padding: 80px 0;
    background: var(--bg-gray);
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.expertise-card {
    background: var(--bg-light);
    padding: 40px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    text-align: center;
}

.expertise-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.expertise-card h3 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.expertise-card p {
    color: var(--text-light);
    line-height: 1.7;
}

/* Achievements Section */
.achievements {
    padding: 80px 0;
    background: var(--bg-light);
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 50px;
    color: var(--text-dark);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: var(--primary-color);
    margin: 20px auto 0;
    border-radius: 2px;
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.achievement-card {
    background: var(--bg-gray);
    padding: 40px;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 2px solid transparent;
}

.achievement-card:hover {
    border-color: var(--primary-color);
    transform: scale(1.05);
}

.achievement-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.achievement-label {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.achievement-card p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* Experience Section */
.experience {
    padding: 80px 0;
    background: var(--bg-gray);
}

.timeline {
    position: relative;
    padding-left: 50px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--primary-light);
}

.timeline-item {
    position: relative;
    margin-bottom: 50px;
}

.timeline-marker {
    position: absolute;
    left: -38px;
    top: 0;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border: 4px solid var(--bg-gray);
    border-radius: 50%;
    box-shadow: 0 0 0 4px var(--primary-light);
}

.timeline-content {
    background: var(--bg-light);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.timeline-content:hover {
    box-shadow: var(--shadow-lg);
    transform: translateX(5px);
}

.timeline-date {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 10px;
}

.timeline-content h3 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: 5px;
}

.timeline-content h4 {
    font-size: 1.2rem;
    color: var(--text-light);
    font-weight: 500;
    margin-bottom: 10px;
}

.timeline-content p {
    color: var(--text-light);
    margin-bottom: 15px;
}

.timeline-content ul {
    list-style: none;
    padding-left: 0;
}

.timeline-content li {
    color: var(--text-light);
    margin-bottom: 10px;
    padding-left: 25px;
    position: relative;
}

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

/* Skills Section */
.skills {
    padding: 80px 0;
    background: var(--bg-light);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
}

.skill-category h3 {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary-light);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.skill-tag {
    background: var(--bg-gray);
    color: var(--text-dark);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
    border: 2px solid transparent;
}

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

/* Contact Section */
.contact {
    padding: 80px 0;
    background: var(--bg-gradient);
    color: white;
}

.contact .section-title {
    color: white;
}

.contact .section-title::after {
    background: white;
}

.contact-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.contact-intro {
    font-size: 1.2rem;
    margin-bottom: 40px;
    opacity: 0.95;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.contact-item {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 25px;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    gap: 15px;
    justify-content: center;
    transition: var(--transition);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.contact-item:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-5px);
}

.contact-icon {
    font-size: 1.8rem;
}

.contact-logo {
    width: 70px;
    height: 70px;
    object-fit: contain;
}

.contact-item a {
    color: white;
    text-decoration: none;
    font-weight: 500;
}

.contact-item span {
    font-weight: 500;
}

/* Footer */
footer {
    background: var(--bg-gray);
    padding: 40px 0;
    text-align: center;
    color: var(--text-light);
}

footer p {
    margin-bottom: 10px;
}

.footer-note {
    font-size: 0.9rem;
    font-style: italic;
}

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

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

/* Responsive Design */
@media (max-width: 968px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

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

    .role-badges {
        justify-content: center;
    }

    .profile-photo-placeholder {
        width: 300px;
        height: 400px;
    }

    nav {
        gap: 15px;
    }

    nav a {
        padding: 6px 12px;
        font-size: 0.9rem;
    }
}

@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        text-align: center;
    }

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

    .hero-subtitle {
        font-size: 1rem;
    }

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

    .timeline {
        padding-left: 30px;
    }

    .timeline::before {
        left: 10px;
    }

    .timeline-marker {
        left: -28px;
    }

    .profile-photo-placeholder {
        width: 250px;
        height: 350px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 50px 0;
    }

    .hero-title {
        font-size: 1.8rem;
    }

    .expertise,
    .achievements,
    .experience,
    .skills,
    .contact {
        padding: 50px 0;
    }

    .badge {
        padding: 8px 16px;
        font-size: 0.9rem;
    }

    .achievement-number {
        font-size: 2.5rem;
    }

    .profile-photo-placeholder {
        width: 200px;
        height: 300px;
    }

    .placeholder-text {
        font-size: 1.2rem;
    }
}