/* ===================================
   CSS Variables & Theme
   =================================== */
:root {
    /* Colors - Light Mode */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #f0f2f5;
    --text-primary: #1a1a2e;
    --text-secondary: #4a4a6a;
    --text-muted: #7a7a9a;
    --border-color: #e0e0e0;
    --accent: #6366f1;
    --accent-hover: #4f46e5;
    --accent-light: rgba(99, 102, 241, 0.1);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.12);
    --shadow-hover: 0 20px 50px rgba(0, 0, 0, 0.15);

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Spacing */
    --nav-height: 70px;
    --section-padding: 100px;
    --container-max: 1200px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

[data-theme="dark"] {
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #252540;
    --text-primary: #f0f0f5;
    --text-secondary: #b0b0c5;
    --text-muted: #8080a0;
    --border-color: #303050;
    --accent: #818cf8;
    --accent-hover: #a5b4fc;
    --accent-light: rgba(129, 140, 248, 0.15);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.5);
    --shadow-hover: 0 20px 50px rgba(0, 0, 0, 0.6);
}

/* ===================================
   Base Styles
   =================================== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-sans);
    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;
}

::selection {
    background-color: var(--accent);
    color: white;
}

.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* ===================================
   Navigation
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: all var(--transition-normal);
}

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

.nav-container {
    max-width: var(--container-max);
    height: 100%;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.nav-logo-img {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: contain;
}

.nav-menu {
    display: flex;
    gap: 32px;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent);
    transition: width var(--transition-normal);
}

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

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

.nav-toggles {
    display: flex;
    align-items: center;
    gap: 12px;
}

.toggle-btn {
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--bg-secondary);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.toggle-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.lang-toggle .lang-text {
    font-size: 0.75rem;
    font-weight: 600;
}

.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
}

.hamburger span {
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    transition: all var(--transition-fast);
}

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

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

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    text-align: center;
    padding: calc(var(--nav-height) + 80px) 24px 80px;
    position: relative;
}

.hero-content {
    max-width: 800px;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.hero-greeting {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    color: var(--accent);
    margin-bottom: 16px;
    min-height: 96px;
    white-space: pre-wrap;
    line-height: 1.6;
    display: flex;
    justify-content: center;
    width: 100%;
}

.typing-wrapper {
    display: inline;
    text-align: left;
}

.typing-text {
    display: inline;
}

.cursor {
    display: inline;
    color: var(--accent);
    animation: blink 1s step-end infinite;
    font-weight: 300;
}

@keyframes blink {
    50% { opacity: 0; }
}

.hero-title {
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 700;
    letter-spacing: -2px;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 16px;
    line-height: 1.7;
}

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

.hero-subtitle {
    font-size: 1.15rem;
    color: #16a34a;
    margin-bottom: 24px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    padding: 12px 24px;
    border: 1px solid rgba(22, 163, 74, 0.5);
    border-radius: 8px;
    background: rgba(22, 163, 74, 0.1);
}

.hero-stats {
    display: flex;
    gap: 48px;
    justify-content: center;
    margin-top: 20px;
    margin-bottom: 32px;
}

.hero-stats .stat {
    text-align: center;
}

.hero-stats .stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent);
}

.hero-stats .stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    margin-top: 10px;
    justify-content: center;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: none;
}

.btn-primary {
    background-color: var(--accent);
    color: white;
}

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

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

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

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

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

.btn-full {
    width: 100%;
    justify-content: center;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.mouse {
    width: 26px;
    height: 42px;
    border: 2px solid var(--text-muted);
    border-radius: 20px;
    position: relative;
}

.wheel {
    width: 4px;
    height: 8px;
    background-color: var(--accent);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 1.5s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

@keyframes scroll {
    0% { opacity: 1; top: 8px; }
    100% { opacity: 0; top: 24px; }
}

/* ===================================
   Sections Common
   =================================== */
.section {
    padding: var(--section-padding) 0;
}

.section:nth-child(even) {
    background-color: var(--bg-secondary);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 60px;
    position: relative;
    letter-spacing: -1px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background-color: var(--accent);
    border-radius: 2px;
}

/* ===================================
   About Section
   =================================== */
.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-text p {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.8;
}

.about-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 8px;
}

/* ===================================
   About Mobile Section (Hidden on Desktop)
   =================================== */
.about-mobile {
    display: none;
}

.about-mobile-content {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 28px;
}

.about-mobile-content p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 24px;
}

.about-mobile-content p strong {
    color: var(--accent);
    font-weight: 600;
}

.about-mobile-stats {
    display: flex;
    justify-content: space-around;
    gap: 20px;
}

.about-mobile-stats .stat {
    text-align: center;
}

.about-mobile-stats .stat-number {
    display: block;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent);
}

.about-mobile-stats .stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

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

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

.timeline-item {
    position: relative;
    padding-left: 40px;
    margin-bottom: 50px;
}

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

.timeline-marker {
    position: absolute;
    left: -7px;
    top: 8px;
    width: 16px;
    height: 16px;
    background-color: var(--accent);
    border-radius: 50%;
    border: 4px solid var(--bg-primary);
    box-shadow: var(--shadow-sm);
}

[data-theme="dark"] .timeline-marker {
    border-color: var(--bg-secondary);
}

.timeline-content {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 28px;
    transition: all var(--transition-normal);
    position: relative;
}

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

.timeline-header {
    margin-bottom: 12px;
}

.timeline-logo {
    position: absolute;
    top: 20px;
    right: 20px;
    background-color: white;
    border-radius: 10px;
    padding: 10px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.timeline-logo img {
    max-height: 45px;
    max-width: 120px;
    object-fit: contain;
    display: block;
}

.timeline-header h3 {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.timeline-role {
    color: var(--accent);
    font-weight: 500;
}

.timeline-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 16px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.timeline-meta i {
    margin-right: 6px;
    color: var(--accent);
}

.timeline-details {
    list-style: none;
}

.timeline-details li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 10px;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

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

/* ===================================
   Hackathons / Projects Section
   =================================== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 24px;
}

.project-card {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 28px;
    transition: all var(--transition-normal);
    position: relative;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}

.project-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background-color: var(--accent-light);
    color: var(--accent);
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 16px;
    align-self: flex-start;
}

.project-badge.gold {
    background-color: rgba(245, 158, 11, 0.15);
    color: #f59e0b;
}

.project-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.project-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 20px;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
    flex-grow: 1;
}

.tech-tag {
    padding: 4px 12px;
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 500;
    height: fit-content;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--accent);
    font-weight: 500;
    font-size: 0.9rem;
    transition: all var(--transition-fast);
    margin-top: auto;
    margin-left: auto;
    padding: 8px 16px;
    border-radius: 8px;
    background: var(--accent-light);
    text-decoration: none;
}

.project-link::after {
    content: '→';
    transition: transform var(--transition-fast);
}

.project-link:hover {
    background: var(--accent);
    color: white;
}

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

/* ===================================
   Skills Section
   =================================== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.skill-category {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 28px;
    transition: all var(--transition-normal);
}

.skill-category:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.skill-category h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--accent);
    display: flex;
    align-items: center;
    gap: 10px;
}

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

.skill-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    background-color: var(--bg-tertiary);
    border-radius: 8px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.skill-item:hover {
    background-color: var(--accent-light);
    color: var(--accent);
}

.skill-item i {
    font-size: 1rem;
}

/* ===================================
   Education Section
   =================================== */
.education-grid {
    display: grid;
    gap: 24px;
    margin-bottom: 50px;
}

.education-card {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 28px;
    transition: all var(--transition-normal);
}

.education-card:hover {
    box-shadow: var(--shadow-lg);
}

.education-header {
    display: flex;
    align-items: flex-start;
    gap: 20px;
}

.education-icon {
    width: 100px;
    height: 100px;
    background-color: white;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    padding: 5px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

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

.education-icon i {
    font-size: 1.4rem;
    color: var(--accent);
}

.education-info {
    flex: 1;
}

.education-info h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.education-degree {
    color: var(--accent);
    font-weight: 500;
    display: block;
    margin-bottom: 8px;
}

.education-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.education-meta i {
    margin-right: 6px;
    color: var(--accent);
}

.gpa-badge {
    background-color: var(--accent-light);
    border-radius: 12px;
    padding: 12px 18px;
    text-align: center;
    flex-shrink: 0;
}

.gpa-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
}

.gpa-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.education-courses {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.education-courses h4 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-secondary);
}

.course-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.course-tag {
    padding: 6px 14px;
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 500;
    position: relative;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.course-tag:hover {
    background-color: var(--accent);
    color: white;
}

.course-tag[data-tooltip]:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    padding: 12px 16px;
    border-radius: 10px;
    font-size: 0.8rem;
    font-weight: 400;
    line-height: 1.5;
    width: 300px;
    max-width: 90vw;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    z-index: 100;
    text-align: left;
}

.course-tag[data-tooltip]:hover::before {
    content: '';
    position: absolute;
    bottom: calc(100% + 2px);
    left: 50%;
    transform: translateX(-50%);
    border: 8px solid transparent;
    border-top-color: var(--border-color);
    z-index: 101;
}

/* Languages Section */
.languages-section {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 28px;
}

.languages-section h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--accent);
}

.languages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.language-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background-color: var(--bg-tertiary);
    border-radius: 10px;
}

.language-name {
    font-weight: 500;
    color: var(--text-primary);
}

.language-level {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ===================================
   Contact Section
   =================================== */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
    align-items: start;
}

.contact-info h3 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.contact-info p {
    color: var(--text-secondary);
    margin-bottom: 30px;
    line-height: 1.7;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.contact-link {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 14px 20px;
    background-color: var(--bg-tertiary);
    border-radius: 10px;
    color: var(--text-primary);
    text-decoration: none;
    transition: all var(--transition-normal);
}

.contact-link:hover {
    background-color: var(--accent-light);
    color: var(--accent);
    transform: translateX(8px);
}

.contact-link i {
    font-size: 1.2rem;
    color: var(--accent);
}

.contact-form {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 1rem;
    font-family: inherit;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

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

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

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

/* ===================================
   Footer
   =================================== */
.footer {
    padding: 30px 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

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

/* ===================================
   CV Modal
   =================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background-color: var(--bg-primary);
    border-radius: 16px;
    padding: 40px;
    max-width: 420px;
    width: 90%;
    text-align: center;
    position: relative;
    transform: scale(0.9) translateY(20px);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-hover);
}

.modal-overlay.active .modal {
    transform: scale(1) translateY(0);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
    border: none;
    background-color: var(--bg-tertiary);
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background-color: var(--accent-light);
    color: var(--accent);
}

.modal h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.modal p {
    color: var(--text-secondary);
    margin-bottom: 28px;
}

.modal-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
}

.modal-buttons .btn {
    flex: 1;
}

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

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

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 1024px) {
    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 70px;
        --nav-height: 60px;
    }

    .nav-menu {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background-color: var(--bg-primary);
        border-bottom: 1px solid var(--border-color);
        flex-direction: column;
        padding: 20px 24px;
        gap: 16px;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .hamburger {
        display: flex;
    }

    .hero {
        padding: calc(var(--nav-height) + 30px) 24px 60px;
    }

    .hero-greeting {
        min-height: 120px;
        font-size: 1.1rem;
        margin-bottom: 8px;
    }

    .hero-title {
        font-size: clamp(2.5rem, 10vw, 4rem);
        margin-bottom: 12px;
    }

    .hero-description {
        display: none;
    }

    .hero-stats {
        display: none;
    }

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

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .hero-buttons .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }

    .about-mobile {
        display: block;
    }

    .about-stats {
        gap: 30px;
    }

    .stat-number {
        font-size: 2rem;
    }

    .timeline::before {
        left: 8px;
    }

    .timeline-item {
        padding-left: 32px;
    }

    .timeline-marker {
        left: 1px;
    }

    .timeline-logo {
        padding: 6px;
        top: 15px;
        right: 15px;
    }

    .timeline-logo img {
        max-height: 30px;
        max-width: 80px;
    }

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

    .education-header {
        flex-direction: column;
    }

    .education-icon {
        width: 70px;
        height: 70px;
        padding: 8px;
    }

    .gpa-badge {
        align-self: flex-start;
    }

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

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .nav-toggles .toggle-btn {
        width: 36px;
        height: 36px;
    }

    .timeline-content {
        padding: 20px;
    }

    .project-card,
    .skill-category,
    .education-card,
    .contact-form {
        padding: 20px;
    }

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