/* ===== CSS Variables ===== */
:root {
    /* Light Mode Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --accent-primary: #007bff;
    --accent-secondary: #6c63ff;
    --accent-hover: #0056b3;
    --border-color: #dee2e6;
    --shadow: rgba(0, 0, 0, 0.1);
    --shadow-hover: rgba(0, 0, 0, 0.2);
    --card-bg: #ffffff;
    --navbar-bg: rgba(255, 255, 255, 0.95);
    --particle-color: #007bff;
    --transition: all 0.3s ease;
}

/* Dark Mode Colors */
[data-theme="dark"] {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-tertiary: #0f3460;
    --text-primary: #eaeaea;
    --text-secondary: #a0a0a0;
    --accent-primary: #4d9fff;
    --accent-secondary: #9d8cff;
    --accent-hover: #6baeff;
    --border-color: #2d3748;
    --shadow: rgba(0, 0, 0, 0.3);
    --shadow-hover: rgba(0, 0, 0, 0.5);
    --card-bg: #16213e;
    --navbar-bg: rgba(26, 26, 46, 0.95);
    --particle-color: #4d9fff;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

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

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--navbar-bg);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px var(--shadow);
    z-index: 1000;
    transition: var(--transition);
}

/* Scroll Progress Indicator */
.scroll-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    width: 0%;
    transition: width 0.1s ease;
    border-radius: 0 3px 3px 0;
    z-index: 1001;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand a {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent-primary);
    text-decoration: none;
    transition: var(--transition);
}

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-menu a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-primary);
    transition: width 0.3s ease;
}

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

.nav-menu a.active {
    color: var(--accent-primary);
}

.nav-menu a.active::after {
    width: 100%;
}

.nav-controls {
    display: flex;
    gap: 15px;
    align-items: center;
}

.control-btn {
    background: var(--bg-tertiary);
    border: none;
    padding: 8px 15px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    transition: var(--transition);
    color: var(--text-primary);
}

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

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    transition: var(--transition);
    border-radius: 2px;
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

#particles-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 20px;
    animation: fadeInUp 1s ease;
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 1s ease 0.2s both;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    animation: fadeInUp 1s ease 0.4s both;
}

.hero-cta {
    display: flex;
    gap: 20px;
    justify-content: center;
    animation: fadeInUp 1s ease 0.6s both;
}

/* ===== Buttons ===== */
.btn {
    padding: 15px 40px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    display: inline-block;
    cursor: pointer;
    border: 2px solid transparent;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px var(--shadow-hover);
}

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

.btn-secondary:hover {
    background: var(--accent-primary);
    color: white;
    transform: translateY(-3px);
}

/* ===== Scroll Indicator ===== */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: var(--text-secondary);
    z-index: 2;
    animation: bounce 2s infinite;
}

.scroll-arrow {
    width: 2px;
    height: 40px;
    background: var(--accent-primary);
    margin: 10px auto;
    position: relative;
}

.scroll-arrow::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: -4px;
    width: 10px;
    height: 10px;
    border-right: 2px solid var(--accent-primary);
    border-bottom: 2px solid var(--accent-primary);
    transform: rotate(45deg);
}

/* ===== Quick Intro Section ===== */
.quick-intro {
    padding: 100px 20px;
    background: var(--bg-secondary);
}

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

/* Home Page Extended Content */
.home-about {
    padding: 80px 20px;
    background: var(--bg-primary);
}

.home-about-content {
    max-width: 1000px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text-home h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-text-home p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.about-highlights-home {
    display: grid;
    gap: 15px;
    margin-top: 30px;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background: var(--bg-secondary);
    border-radius: 10px;
    transition: var(--transition);
}

.highlight-item:hover {
    transform: translateX(10px);
    box-shadow: 0 5px 15px var(--shadow);
}

.highlight-icon {
    font-size: 2rem;
    min-width: 50px;
    text-align: center;
}

.highlight-text h4 {
    font-size: 1.1rem;
    margin-bottom: 5px;
    color: var(--text-primary);
}

.highlight-text p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
}

.goals-section {
    padding: 80px 20px;
    background: var(--bg-secondary);
}

.goals-content {
    max-width: 1000px;
    margin: 0 auto;
    text-align: center;
}

.goals-content h2 {
    font-size: 2.5rem;
    margin-bottom: 40px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.goals-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.goal-card {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 5px 15px var(--shadow);
    transition: var(--transition);
}

.goal-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px var(--shadow-hover);
}

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

.goal-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--accent-primary);
}

.goal-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.intro-card {
    background: var(--card-bg);
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 15px var(--shadow);
    transition: var(--transition);
    opacity: 0;
    transform: translateY(30px);
}

.intro-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px var(--shadow-hover);
}

.intro-card.visible {
    opacity: 1;
    transform: translateY(0);
}

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

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

.intro-card p {
    color: var(--text-secondary);
}

/* ===== About Highlights (for about.html) ===== */
.about-highlights {
    margin-top: 30px;
}

.about-highlights h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--accent-primary);
}

.about-highlights ul {
    list-style: none;
    padding: 0;
}

.about-highlights li {
    padding: 10px 0;
    font-size: 1.05rem;
    color: var(--text-primary);
}

/* ===== About Page ===== */
.about-section {
    padding: 120px 20px 80px;
    min-height: 100vh;
}

.about-container {
    max-width: 1000px;
    margin: 0 auto;
}

.about-header {
    text-align: center;
    margin-bottom: 60px;
    animation: fadeInUp 0.8s ease;
}

.about-header h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 50px;
    align-items: start;
}

.about-image {
    text-align: center;
    animation: fadeInLeft 0.8s ease;
}

.profile-img {
    width: 250px;
    height: 250px;
    border-radius: 50%;
    object-fit: cover;
    border: 5px solid var(--accent-primary);
    box-shadow: 0 10px 30px var(--shadow);
    transition: var(--transition);
}

.profile-img:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 40px var(--shadow-hover);
}

.about-text {
    animation: fadeInRight 0.8s ease;
}

.about-text h2 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--accent-primary);
}

.about-text p {
    margin-bottom: 20px;
    line-height: 1.8;
    color: var(--text-secondary);
}

.motto {
    background: var(--bg-secondary);
    padding: 20px;
    border-left: 4px solid var(--accent-primary);
    border-radius: 8px;
    font-style: italic;
    margin-top: 30px;
}

/* Career Timeline */
.timeline-section {
    margin-top: 60px;
    padding: 40px 0;
}

.timeline-section h2 {
    font-size: 2rem;
    margin-bottom: 50px;
    text-align: center;
    color: var(--accent-primary);
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding: 20px 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 4px;
}

.timeline-item {
    position: relative;
    margin-bottom: 50px;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.timeline-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-left: auto;
    text-align: left;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-right: auto;
    text-align: right;
}

.timeline-content {
    position: relative;
    width: calc(50% - 40px);
    padding: 25px;
    background: var(--card-bg);
    border-radius: 15px;
    box-shadow: 0 5px 15px var(--shadow);
    transition: var(--transition);
}

.timeline-content:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 30px var(--shadow-hover);
}

.timeline-year {
    display: inline-block;
    padding: 8px 20px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    border-radius: 20px;
    font-weight: bold;
    margin-bottom: 15px;
    font-size: 0.9rem;
}

.timeline-role {
    font-size: 1.3rem;
    font-weight: bold;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.timeline-company {
    font-size: 1rem;
    color: var(--accent-primary);
    margin-bottom: 10px;
}

.timeline-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 15px;
}

.timeline-achievements {
    list-style: none;
    padding: 0;
    margin-top: 15px;
}

.timeline-achievements li {
    padding: 5px 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.timeline-achievements li::before {
    content: '✓ ';
    color: var(--accent-primary);
    font-weight: bold;
    margin-right: 8px;
}

.timeline-dot {
    position: absolute;
    left: 50%;
    top: 30px;
    transform: translateX(-50%);
    width: 20px;
    height: 20px;
    background: var(--accent-primary);
    border: 4px solid var(--bg-primary);
    border-radius: 50%;
    z-index: 10;
    box-shadow: 0 0 0 4px var(--accent-secondary);
    transition: var(--transition);
}

.timeline-item:hover .timeline-dot {
    transform: translateX(-50%) scale(1.3);
    box-shadow: 0 0 0 6px var(--accent-secondary);
}

/* ===== Skills Page ===== */
.skills-section {
    padding: 120px 20px 80px;
    min-height: 100vh;
}

.skills-header {
    text-align: center;
    margin-bottom: 60px;
}

.skills-header h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.search-container {
    max-width: 500px;
    margin: 0 auto 40px;
}

.search-box {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid var(--border-color);
    border-radius: 50px;
    font-size: 1rem;
    background: var(--bg-secondary);
    color: var(--text-primary);
    transition: var(--transition);
}

.search-box:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

.skills-categories {
    display: grid;
    gap: 40px;
}

.skill-category {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 5px 15px var(--shadow);
    animation: fadeInUp 0.6s ease;
}

.skill-category h3 {
    font-size: 1.8rem;
    margin-bottom: 25px;
    color: var(--accent-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

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

.skills-grid {
    display: grid;
    gap: 20px;
}

.skill-item {
    position: relative;
}

.skill-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.skill-name {
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.tech-icon {
    width: 20px;
    height: 20px;
    filter: var(--icon-filter);
}

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

.skill-bar {
    height: 10px;
    background: var(--bg-tertiary);
    border-radius: 10px;
    overflow: hidden;
    position: relative;
}

.skill-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 10px;
    width: 0;
    transition: width 1.5s ease;
}

.skill-tooltip {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-10px);
    background: var(--bg-tertiary);
    padding: 10px 15px;
    border-radius: 8px;
    font-size: 0.85rem;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    box-shadow: 0 5px 15px var(--shadow);
}

.skill-item:hover .skill-tooltip {
    opacity: 1;
    transform: translateX(-50%) translateY(-5px);
}

/* ===== Projects Page ===== */
.projects-section {
    padding: 120px 20px 80px;
    min-height: 100vh;
}

.projects-header {
    text-align: center;
    margin-bottom: 60px;
}

.projects-header h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.projects-filters {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 25px;
    border: 2px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-radius: 25px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

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

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
}

.project-card {
    background: var(--card-bg);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 15px var(--shadow);
    transition: var(--transition);
    animation: fadeInUp 0.6s ease;
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px var(--shadow-hover);
}

.project-content {
    padding: 25px;
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 15px;
}

.project-card h3 {
    font-size: 1.5rem;
    color: var(--accent-primary);
    margin-bottom: 10px;
}

.project-card p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.6;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.tech-tag {
    background: var(--bg-tertiary);
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 0.85rem;
    color: var(--text-primary);
}

.project-links {
    display: flex;
    gap: 15px;
}

.project-link {
    padding: 8px 20px;
    border-radius: 20px;
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.project-link.github {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

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

.project-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px var(--shadow);
}

/* ===== Contact Page ===== */
.contact-section {
    padding: 120px 20px 80px;
    min-height: 100vh;
}

.contact-container {
    max-width: 1200px;
    margin: 0 auto;
}

.contact-header {
    text-align: center;
    margin-bottom: 60px;
}

.contact-header h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}

.contact-form {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 5px 15px var(--shadow);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    background: var(--bg-secondary);
    color: var(--text-primary);
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

.submit-btn {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.submit-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px var(--shadow-hover);
}

.contact-info {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 5px 15px var(--shadow);
}

.social-links {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.social-link {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background: var(--bg-secondary);
    border-radius: 10px;
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition);
}

.social-link:hover {
    background: var(--accent-primary);
    color: white;
    transform: translateX(10px);
}

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

.cv-download {
    margin-top: 30px;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 15px 30px;
    background: var(--accent-secondary);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition);
}

.download-btn:hover {
    background: var(--accent-primary);
    transform: translateY(-3px);
    box-shadow: 0 10px 25px var(--shadow-hover);
}

/* ===== Footer ===== */
.footer {
    background: var(--bg-secondary);
    padding: 40px 20px;
    margin-top: 80px;
    border-top: 1px solid var(--border-color);
}

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

.footer-links {
    display: flex;
    gap: 25px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

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

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

@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);
    }
}

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

.fade-in {
    animation: fadeInUp 0.8s ease;
}

/* ===== Responsive Design ===== */
@media (max-width: 968px) {
    .hero-title {
        font-size: 3rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .home-about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .timeline::before {
        left: 20px;
    }

    .timeline-item:nth-child(odd) .timeline-content,
    .timeline-item:nth-child(even) .timeline-content {
        width: calc(100% - 60px);
        margin-left: 60px;
        text-align: left;
    }

    .timeline-dot {
        left: 20px;
    }

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

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

    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--navbar-bg);
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 5px 15px var(--shadow);
    }

    .nav-menu.active {
        display: flex;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 640px) {
    .hero-title {
        font-size: 2.5rem;
    }

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

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

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

    .contact-form,
    .contact-info {
        padding: 25px;
    }

    .profile-img {
        width: 200px;
        height: 200px;
    }

    .timeline-item:nth-child(odd) .timeline-content,
    .timeline-item:nth-child(even) .timeline-content {
        width: calc(100% - 50px);
        margin-left: 50px;
    }
}