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

:root {
    /* Color Palette - Dark Mode with Purple Accent */
    --bg-primary: #0f1115;
    --bg-secondary: #1a1d24;
    --bg-tertiary: #252a34;
    
    --accent-primary: #a855f7; /* Vibrant Purple */
    --accent-hover: #9333ea;
    --accent-light: rgba(168, 85, 247, 0.15);
    
    --text-primary: #f9fafb;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    --border-color: rgba(255, 255, 255, 0.08);
    
    /* Layout */
    --container-width: 1100px;
    --nav-height: 80px;
    
    /* Typography */
    --font-primary: 'Inter', sans-serif;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

/* Typography Utilities */
.highlight {
    color: var(--accent-primary);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    letter-spacing: -0.02em;
}

/* Layout */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 6rem 0;
}

.dark-alt {
    background-color: var(--bg-secondary);
}

/* Buttons */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: var(--accent-primary);
    color: #fff;
    padding: 0.875rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    white-space: nowrap;
    transition: background-color var(--transition-fast), transform var(--transition-fast);
}

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

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: transparent;
    color: var(--text-primary);
    padding: 0.875rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn-secondary:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--text-secondary);
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    height: var(--nav-height);
    background-color: rgba(15, 17, 21, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.nav-content {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--accent-primary);
    letter-spacing: -0.05em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2.5rem;
}

.nav-links a:not(.btn-primary) {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.nav-links a:not(.btn-primary):hover {
    color: var(--text-primary);
}

/* Language Switcher */
.lang-switcher {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    margin-left: 1rem;
    padding-left: 1rem;
    border-left: 1px solid var(--border-color);
}

.lang-btn {
    background: transparent;
    border: 2px solid transparent;
    border-radius: 50%;
    width: 32px;
    height: 32px;
    padding: 2px;
    cursor: pointer;
    transition: all var(--transition-fast);
    opacity: 0.5;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lang-btn img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

.lang-btn:hover {
    opacity: 0.8;
}

.lang-btn.active {
    opacity: 1;
    border-color: var(--accent-primary);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--text-primary);
    margin: 5px 0;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--nav-height);
}

.hero-content {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 4rem;
}

.hero-text {
    flex: 1;
}

.greeting {
    font-size: 1.125rem;
    color: var(--accent-primary);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.name {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.title {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.crea-title {
    display: block;
    font-size: 0.65em;
    color: var(--text-tertiary, #8892b0);
    margin-top: 0.3rem;
    font-weight: 400;
}

.summary {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 540px;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: flex-end;
}

.image-wrapper {
    position: relative;
    width: 400px;
    height: 480px;
    border-radius: 20px;
    overflow: hidden;
}

.image-wrapper::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 20px;
    box-shadow: inset 0 0 0 1px rgba(255,255,255,0.1);
    pointer-events: none;
}

.image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scale(1.15); /* Zoom slightly more to hide the AI watermark completely */
    transition: transform var(--transition-smooth);
}

.image-wrapper:hover img {
    transform: scale(1.2);
}

/* About Section */
.about-grid {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.about-text p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.stats {
    display: flex;
    justify-content: center;
    gap: 4rem;
    flex-wrap: wrap;
    margin-top: 3rem;
    padding-top: 3rem;
    border-top: 1px solid var(--border-color);
    width: 100%;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-num {
    font-size: 3rem;
    font-weight: 800;
    color: var(--accent-primary);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-desc {
    font-size: 0.9rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
}

/* Research Section */
.research-card {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2.5rem;
    transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.research-card.focus {
    border-color: var(--accent-light);
    box-shadow: 0 10px 30px -10px rgba(168, 85, 247, 0.1);
}

.research-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-primary);
}

.research-desc {
    color: var(--text-secondary);
    margin: 1.5rem 0;
}

.tags {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.tags span {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

/* Timeline / Experience */
.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--border-color);
}

.timeline-item {
    position: relative;
    padding-left: 3rem;
    padding-bottom: 3rem;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: 9px;
    top: 5px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background-color: var(--accent-primary);
    border: 3px solid var(--bg-primary);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 0.25rem;
}

.card-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

.date {
    font-size: 0.9rem;
    color: var(--accent-primary);
    font-weight: 500;
}

.institution {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 1rem;
}

.timeline-content p {
    color: var(--text-secondary);
}

/* Education Grid */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.edu-card {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
}

.edu-card h3 {
    font-size: 1.15rem;
    margin-bottom: 0.25rem;
}

.edu-card .date {
    margin-bottom: 1rem;
}

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

/* Contact */
.contact-wrapper {
    background-color: var(--bg-secondary);
    border-radius: 20px;
    padding: 4rem;
    border: 1px solid var(--border-color);
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.contact-info p {
    color: var(--text-secondary);
    margin: 0 auto 2.5rem auto;
}

.contact-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    width: fit-content;
    margin: 0 auto;
}

.contact-links li {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 1rem;
    margin-bottom: 1.25rem;
    color: var(--text-secondary);
}

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

.contact-links .icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    font-size: 0.95rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: inherit;
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.form-note {
    margin-top: 1.5rem;
    font-size: 0.85rem;
    color: #ef4444; /* red */
    line-height: 1.4;
}

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

.footer p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 992px) {
    .hero-content {
        flex-direction: column-reverse;
        text-align: center;
        padding-top: 4rem;
    }
    
    .hero-image {
        justify-content: center;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr;
        padding: 2rem;
    }
    
    .grid-2 {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .name {
        font-size: 3rem;
    }
    
    .nav-links {
        display: none; /* simple mobile hide for now */
    }
    
    .menu-toggle {
        display: block;
    }
    
    .stats {
        flex-direction: column;
        gap: 2rem;
    }
    
    .timeline::before {
        left: 0;
    }
    
    .timeline-dot {
        left: -6px;
    }
    
    .timeline-item {
        padding-left: 2rem;
    }
    
    .card-header {
        flex-direction: column;
    }
}

/* New specific additions */
.tech-stack {
    margin-top: 1rem;
    font-size: 0.9rem;
    color: var(--text-primary) !important;
}

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

.subsection-title {
    color: var(--text-secondary);
    letter-spacing: -0.01em;
}

.edu-card.compact {
    padding: 1.5rem;
    background-color: var(--bg-tertiary);
    border: none;
}

.edu-card.compact h4 {
    font-size: 1rem;
    margin-bottom: 0.2rem;
    color: var(--text-primary);
}

.edu-card.compact h5 {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.edu-card.compact .date {
    margin-top: 0.5rem;
    font-size: 0.85rem;
    margin-bottom: 0;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    align-items: center;
    justify-content: center;
}

.modal.show {
    display: flex;
}

.modal-content {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 3rem;
    max-width: 500px;
    width: 90%;
    position: relative;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    animation: modalFadeIn 0.3s ease;
}

@keyframes modalFadeIn {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    font-size: 2rem;
    color: var(--text-secondary);
    background: none;
    border: none;
    cursor: pointer;
    transition: color 0.2s;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-options {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.modal-btn {
    width: 100%;
}