/* Base Styles & CSS Variables */
:root {
    --bg-color: #0d1117;
    --surface-color: #161b22;
    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --accent-color: #58a6ff;
    --accent-glow: rgba(88, 166, 255, 0.4);
    --border-color: #30363d;
    --glass-bg: rgba(22, 27, 34, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.light-theme {
    --bg-color: #ffffff;
    --surface-color: #f6f8fa;
    --text-primary: #24292f;
    --text-secondary: #57606a;
    --accent-color: #0969da;
    --accent-glow: rgba(9, 105, 218, 0.3);
    --border-color: #d0d7de;
    --glass-bg: rgba(255, 255, 255, 0.8);
    --glass-border: rgba(0, 0, 0, 0.1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.4s ease, color 0.4s ease;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Outfit', sans-serif;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

.section {
    padding: 100px 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 50px;
    text-align: center;
    position: relative;
    color: var(--text-primary);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--accent-color);
    border-radius: 2px;
}

/* Glassmorphism Card Style */
.card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 30px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: var(--transition);
}

.hover-effect:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
    border-color: var(--accent-color);
}

/* Navigation */
#navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: var(--glass-bg);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
    padding: 15px 0;
}

#navbar.scrolled {
    padding: 10px 0;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

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

.logo {
    font-size: 1.8rem;
    font-weight: 800;
    font-family: 'Outfit', sans-serif;
    color: var(--accent-color);
    letter-spacing: -1px;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    font-weight: 500;
    font-size: 1rem;
    color: var(--text-secondary);
    transition: var(--transition);
    position: relative;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--accent-color);
}

.nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background-color: var(--accent-color);
    transition: var(--transition);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

#theme-toggle {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition);
    margin-left: 20px;
}

#theme-toggle:hover {
    color: var(--accent-color);
    transform: rotate(30deg);
}

/* Hamburger Menu */
.hamburger {
    display: none;
    cursor: pointer;
}

.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    transition: var(--transition);
    background-color: var(--text-primary);
}

/* Hero Section */
.hero {
    position: relative;
    padding-top: 100px;
    justify-content: center;
    text-align: center;
    overflow: hidden;
}

.hero-content {
    max-width: 800px;
    z-index: 2;
    padding: 0 20px;
}

.greeting {
    color: var(--accent-color);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 10px;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.name {
    font-size: 4.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 20px;
    background: linear-gradient(90deg, var(--text-primary), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.title {
    font-size: 2rem;
    color: var(--text-secondary);
    margin-bottom: 25px;
}

.cursor {
    color: var(--accent-color);
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

.summary {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px auto;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 40px;
}

.btn {
    padding: 12px 28px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.primary-btn {
    background-color: var(--accent-color);
    color: #fff;
    border: 2px solid var(--accent-color);
    box-shadow: 0 4px 15px var(--accent-glow);
}

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

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

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

.social-links-hero {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.social-links-hero a {
    color: var(--text-secondary);
    font-size: 1.5rem;
    transition: var(--transition);
}

.social-links-hero a:hover {
    color: var(--accent-color);
    transform: translateY(-3px);
}

/* Hero Shapes (Background Animation) */
.hero-shapes {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    overflow: hidden;
    pointer-events: none;
}

.shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: float 10s infinite alternate cubic-bezier(0.4, 0, 0.2, 1);
}

.shape-1 {
    width: 400px;
    height: 400px;
    background: var(--accent-color);
    top: -100px;
    right: -100px;
}

.shape-2 {
    width: 300px;
    height: 300px;
    background: #a371f7;
    bottom: -50px;
    left: -100px;
    animation-delay: -5s;
}

.shape-3 {
    width: 200px;
    height: 200px;
    background: #2ea043;
    top: 40%;
    left: 40%;
    animation-duration: 15s;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(30px, 50px) scale(1.1); }
}

.scroll-down {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--text-secondary);
    font-size: 1.5rem;
    animation: bounce 2s infinite;
    z-index: 2;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0) translateX(-50%); }
    40% { transform: translateY(-15px) translateX(-50%); }
    60% { transform: translateY(-7px) translateX(-50%); }
}

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

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

.about-text strong {
    color: var(--accent-color);
}

.about-stats {
    display: flex;
    justify-content: center;
    gap: 50px;
    margin-top: 40px;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--accent-color);
    line-height: 1;
}

.stat-label {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-top: 5px;
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.skill-category h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.skill-category h3 i {
    color: var(--accent-color);
}

.skill-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.skill-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 0.95rem;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background-color: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}

.progress {
    height: 100%;
    background-color: var(--accent-color);
    border-radius: 4px;
    position: relative;
    box-shadow: 0 0 10px var(--accent-glow);
    /* For animation in script.js */
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 1.5s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.progress.animate {
    transform: scaleX(1);
}

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

.timeline::before {
    content: '';
    position: absolute;
    width: 2px;
    height: 100%;
    background: var(--border-color);
    left: 20px;
    top: 0;
}

.timeline-item {
    position: relative;
    padding-left: 60px;
    margin-bottom: 40px;
}

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

.timeline-dot {
    position: absolute;
    left: 14px;
    top: 0;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent-color);
    box-shadow: 0 0 10px var(--accent-glow);
    border: 3px solid var(--bg-color);
}

.timeline-content .date {
    font-size: 0.9rem;
    color: var(--accent-color);
    font-weight: 600;
    display: inline-block;
    margin-bottom: 10px;
}

.timeline-content .title {
    font-size: 1.4rem;
    margin-bottom: 5px;
    color: var(--text-primary);
}

.timeline-content .subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 15px;
    font-style: italic;
}

.details-list {
    padding-left: 20px;
    color: var(--text-secondary);
    list-style-type: disc;
}

.details-list li {
    margin-bottom: 8px;
    line-height: 1.5;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 15px;
}

.tag {
    background-color: rgba(88, 166, 255, 0.1);
    color: var(--accent-color);
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 500;
    border: 1px solid rgba(88, 166, 255, 0.2);
}

/* Education Section */
.edu-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.column-title {
    font-size: 1.5rem;
    margin-bottom: 30px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.column-title i {
    color: var(--accent-color);
}

.edu-card {
    margin-bottom: 20px;
}

.edu-card .date {
    font-size: 0.85rem;
    color: var(--accent-color);
    font-weight: 600;
    margin-bottom: 8px;
    display: block;
}

.edu-card .degree {
    font-size: 1.2rem;
    margin-bottom: 5px;
}

.edu-card .institution {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 8px;
}

.edu-card .score {
    font-weight: 600;
    color: var(--text-primary);
}

.cert-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.cert-item {
    display: flex;
    align-items: center;
    padding: 20px;
}

.cert-date {
    min-width: 90px;
    font-size: 0.85rem;
    color: var(--accent-color);
    font-weight: 600;
}

.cert-details h4 {
    font-size: 1.05rem;
    margin-bottom: 2px;
}

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

/* Contact Section */
.contact-text {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto 40px auto;
}

.contact-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}

.contact-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 30px 20px;
}

.contact-card i {
    font-size: 2.5rem;
    color: var(--accent-color);
    margin-bottom: 15px;
}

.contact-card h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

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

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

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

/* Scroll Animation Classes */
.reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.8s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive Design */
@media (max-width: 992px) {
    .name { font-size: 3.5rem; }
    .title { font-size: 1.6rem; }
    .edu-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .section { padding: 80px 0; }
    .hamburger { display: block; }
    
    .nav-links {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--surface-color);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 30px 0;
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-links.active { left: 0; }
    .nav-item { margin: 15px 0; }
    
    .hamburger.active .bar:nth-child(2) { opacity: 0; }
    .hamburger.active .bar:nth-child(1) { transform: translateY(8px) rotate(45deg); }
    .hamburger.active .bar:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

    .name { font-size: 2.8rem; }
    .hero-buttons { flex-direction: column; padding: 0 20px; }
    .about-stats { flex-direction: column; gap: 30px; }
    .cert-item { flex-direction: column; align-items: flex-start; gap: 10px; }
}

@media (max-width: 480px) {
    .name { font-size: 2.2rem; }
    .section-title { font-size: 2rem; }
    .timeline { padding-left: 10px; }
    .timeline::before { left: 10px; }
    .timeline-dot { left: 4px; }
    .timeline-item { padding-left: 40px; }
}