:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a25;
    --text-primary: #e4e4e7;
    --text-secondary: #a1a1aa;
    --accent-primary: #7c3aed;
    --accent-secondary: #a855f7;
    --accent-glow: rgba(124, 58, 237, 0.3);
    --border-color: #27273a;
    --gradient-1: linear-gradient(135deg, #7c3aed 0%, #a855f7 100%);
    --gradient-2: linear-gradient(135deg, #06b6d4 0%, #7c3aed 100%);
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-secondary);
    text-decoration: none;
    font-family: 'Fira Code', monospace;
    transition: color 0.3s ease;
}

.logo:hover {
    color: var(--accent-primary);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-1);
    transition: width 0.3s ease;
}

.nav-links a:hover {
    color: var(--text-primary);
}

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

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

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s ease;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 70px;
    overflow: hidden;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    width: 70%;
    height: 70%;
    top: -10%;
    left: 15%;
    background: radial-gradient(ellipse at center, var(--accent-glow) 0%, transparent 70%);
    animation: glow-drift 9s ease-in-out infinite alternate;
    pointer-events: none;
    z-index: 0;
    border-radius: 50%;
    filter: blur(20px);
}

.hero .container {
    position: relative;
    z-index: 1;
}

@keyframes glow-drift {
    0%   { transform: translate(-20%, 0%)  scale(1);   opacity: 0.8; }
    25%  { transform: translate(25%, 15%)  scale(1.2); opacity: 1;   }
    50%  { transform: translate(10%, 30%)  scale(0.9); opacity: 0.7; }
    75%  { transform: translate(-15%, 20%) scale(1.1); opacity: 1;   }
    100% { transform: translate(20%, 5%)   scale(1);   opacity: 0.8; }
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-text,
.hero-visual {
    min-width: 0;
}

.greeting {
    color: var(--accent-secondary);
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.name {
    font-size: 4rem;
    font-weight: 700;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
    margin-bottom: 0.5rem;
}

.title {
    font-size: 2rem;
    color: var(--text-secondary);
    font-weight: 400;
    margin-bottom: 1.5rem;
}

.description {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 2rem;
    max-width: 500px;
}

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

.btn {
    padding: 0.875rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 1rem;
}

.btn-primary {
    background: var(--gradient-1);
    color: white;
    border: 2px solid transparent;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px var(--accent-glow);
}

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

.btn-secondary:hover {
    border-color: var(--accent-secondary);
    background: rgba(124, 58, 237, 0.1);
}

/* Code Block */
.code-block {
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    width: 100%;
    max-width: 500px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
    min-width: 0;
}

.code-header {
    display: flex;
    gap: 8px;
    padding: 1rem;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27ca40; }

.code-block pre {
    padding: 1.5rem;
    overflow-x: auto;
}

.code-block code {
    font-family: 'Fira Code', monospace;
    font-size: 0.9rem;
    line-height: 1.8;
    white-space: pre;
}

.keyword { color: #c678dd; }
.class { color: #e5c07b; }
.function { color: #61afef; }
.string { color: #98c379; }

/* Section Styles */
section {
    padding: 6rem 0;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-1);
    border-radius: 2px;
}

/* About Section */
.about {
    background: var(--bg-secondary);
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.stat-card {
    background: var(--bg-tertiary);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

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

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

/* Infinity animation */
.infinity-svg {
    display: inline-block;
    vertical-align: middle;
}

.ink-line {
    fill: none;
    stroke: url(#infinity-gradient);
    stroke-width: 12;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-dasharray: 260;
    stroke-dashoffset: 260;
}

.ink-line.animate {
    animation: draw 2.5s ease-in-out forwards;
}

@keyframes draw {
    0% { stroke-dashoffset: 260; }
    100% { stroke-dashoffset: 0; }
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.skill-category {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: border-color 0.3s ease;
}

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

.skill-category h3 {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
    color: var(--accent-secondary);
}

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

.skill-tag {
    background: var(--bg-tertiary);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.9rem;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.skill-tag:hover {
    border-color: var(--accent-secondary);
    transform: translateY(-2px);
}

.skill-tag.highlight {
    background: rgba(124, 58, 237, 0.2);
    border-color: var(--accent-primary);
    color: var(--accent-secondary);
}

/* Projects Section */
.projects {
    background: var(--bg-secondary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.project-card {
    background: var(--bg-tertiary);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-1);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

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

.project-card:hover::before {
    transform: scaleX(1);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.folder-icon {
    color: var(--accent-secondary);
}

.project-links a {
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

.project-links a:hover {
    color: var(--accent-secondary);
}

.project-title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.project-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.project-tech span {
    background: rgba(124, 58, 237, 0.1);
    color: var(--accent-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.85rem;
    font-family: 'Fira Code', monospace;
}

/* Contact Section */
.contact {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.contact-description {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto 3rem;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.contact-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: var(--bg-secondary);
    padding: 1.5rem 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.3s ease;
}

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

.contact-icon {
    color: var(--accent-secondary);
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    padding: 2rem 0;
    border-top: 1px solid var(--border-color);
}

.footer p {
    text-align: center;
    color: var(--text-secondary);
}

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

    .hero-visual {
        order: -1;
    }

    .hero-buttons {
        justify-content: center;
    }

    .name {
        font-size: 3rem;
    }

    .description {
        margin-left: auto;
        margin-right: auto;
    }

    .availability-badge {
        margin-left: auto;
        margin-right: auto;
    }

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

    .about-stats {
        flex-direction: row;
        justify-content: center;
    }

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

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

    .nav-links {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    section {
        padding: 4rem 0;
    }
}

@media (max-width: 640px) {
    .container {
        padding: 0 1rem;
    }

    .name {
        font-size: 2.5rem;
    }

    .title {
        font-size: 1.5rem;
    }

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

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

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

    .btn-outline {
        justify-content: center;
    }

    .avatar-ring {
        width: 160px;
        height: 160px;
    }

    .code-block {
        width: 100%;
        font-size: 0.75rem;
    }

    .code-block pre {
        padding: 1rem;
        overflow-x: auto;
    }

    .code-block code {
        font-size: 0.78rem;
    }

    .about-stats {
        flex-direction: column;
    }

    .stat-card {
        width: 100%;
    }

    .contact-links {
        flex-direction: column;
        align-items: center;
    }

    .contact-card {
        width: 100%;
        justify-content: center;
    }

    .timeline-content {
        padding: 1.25rem;
    }

    section {
        padding: 3rem 0;
    }
}

/* Extra small phones */
@media (max-width: 480px) {
    .name {
        font-size: 2rem;
    }

    .greeting {
        font-size: 1rem;
    }

    .description {
        font-size: 1rem;
    }

    .hero-visual {
        gap: 1.25rem;
    }

    .avatar-ring {
        width: 130px;
        height: 130px;
    }

    .code-block {
        display: none;
    }

    .nav-container {
        height: 60px;
    }

    .logo {
        font-size: 1.2rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .project-card {
        padding: 1.25rem;
    }

    .skill-category {
        padding: 1.25rem;
    }

    .footer-inner {
        font-size: 0.85rem;
    }

    .back-to-top {
        bottom: 1rem;
        right: 1rem;
        width: 40px;
        height: 40px;
    }
}

/* =============================================
   Custom Scrollbar
   ============================================= */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--accent-primary); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent-secondary); }

/* =============================================
   Keyboard Focus Styles (Accessibility)
   ============================================= */
:focus-visible {
    outline: 2px solid var(--accent-secondary);
    outline-offset: 3px;
    border-radius: 4px;
}
a:focus-visible, button:focus-visible {
    outline: 2px solid var(--accent-secondary);
    outline-offset: 3px;
    border-radius: 4px;
}

/* =============================================
   Skip to Content Link
   ============================================= */
.skip-link {
    position: absolute;
    top: -100px;
    left: 1rem;
    z-index: 9999;
    background: var(--accent-primary);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 0 0 8px 8px;
    text-decoration: none;
    font-weight: 600;
    transition: top 0.3s ease;
}
.skip-link:focus {
    top: 0;
    outline: 2px solid white;
    outline-offset: -4px;
}

/* =============================================
   Scroll Progress Bar
   ============================================= */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    width: 0%;
    background: var(--gradient-1);
    z-index: 1001;
    transition: width 0.1s linear;
}

/* =============================================
   Back to Top Button
   ============================================= */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 999;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--gradient-1);
    border: none;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transform: translateY(10px);
    transition: opacity 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 15px var(--accent-glow);
}
.back-to-top.visible {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}
.back-to-top:hover {
    box-shadow: 0 8px 25px var(--accent-glow);
    transform: translateY(-3px);
}

/* =============================================
   Availability Badge
   ============================================= */
.availability-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
    color: #22c55e;
    padding: 0.4rem 1rem;
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 1.25rem;
}
.badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #22c55e;
    animation: pulse-green 2s infinite;
}
@keyframes pulse-green {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.4); }
    50% { opacity: 0.8; box-shadow: 0 0 0 5px rgba(34, 197, 94, 0); }
}

/* =============================================
   CV Download Button
   ============================================= */
.btn-outline {
    background: transparent;
    color: var(--accent-secondary);
    border: 2px solid var(--accent-primary);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}
.btn-outline:hover {
    background: rgba(124, 58, 237, 0.15);
    border-color: var(--accent-secondary);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px var(--accent-glow);
}

/* =============================================
   Hero Avatar
   ============================================= */
.hero-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
    min-width: 0;
    max-width: 100%;
}
.avatar-card {
    display: flex;
    justify-content: center;
}
.avatar-ring {
    width: 220px;
    height: 220px;
    border-radius: 50%;
    background: var(--gradient-1);
    padding: 3px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 30px var(--accent-glow);
    animation: avatar-glow 3s ease-in-out infinite alternate;
}
@keyframes avatar-glow {
    from { box-shadow: 0 0 20px var(--accent-glow); }
    to   { box-shadow: 0 0 50px rgba(124, 58, 237, 0.5); }
}
.avatar-photo {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    object-position: center top;
    display: block;
}

/* =============================================
   Education / Timeline Section
   ============================================= */
.education {
    background: var(--bg-primary);
}
.timeline {
    position: relative;
    padding-left: 2rem;
}
.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--gradient-1);
    border-radius: 2px;
}
.timeline-item {
    position: relative;
    padding-bottom: 3rem;
}
.timeline-item:last-child { padding-bottom: 0; }
.timeline-dot {
    position: absolute;
    left: -2.45rem;
    top: 4px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--gradient-1);
    border: 3px solid var(--bg-primary);
    box-shadow: 0 0 10px var(--accent-glow);
}
.timeline-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    transition: border-color 0.3s ease, transform 0.3s ease;
}
.timeline-content:hover {
    border-color: var(--accent-secondary);
    transform: translateX(5px);
}
.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}
.timeline-header h3 {
    font-size: 1.25rem;
    color: var(--text-primary);
}
.timeline-date {
    background: rgba(124, 58, 237, 0.15);
    color: var(--accent-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: 100px;
    font-size: 0.85rem;
    font-family: 'Fira Code', monospace;
    white-space: nowrap;
}
.timeline-institution {
    color: var(--accent-secondary);
    font-weight: 500;
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
}
.timeline-description {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.7;
    margin-bottom: 1.25rem;
}
.timeline-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}
.timeline-tags span {
    background: rgba(124, 58, 237, 0.1);
    color: var(--accent-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.85rem;
    font-family: 'Fira Code', monospace;
}

/* =============================================
   Footer Social Icons
   ============================================= */
.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}
.footer-social {
    display: flex;
    gap: 1rem;
}
.footer-social a {
    color: var(--text-secondary);
    transition: color 0.3s ease, transform 0.3s ease;
    display: flex;
}
.footer-social a:hover {
    color: var(--accent-secondary);
    transform: translateY(-3px);
}

/* =============================================
   Nav Active Link (moved from JS)
   ============================================= */
.nav-links a.active {
    color: var(--accent-secondary);
}
.nav-links a.active::after {
    width: 100%;
}

/* =============================================
   Mobile Nav Toggle Animation (moved from JS)
   ============================================= */
.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

@media (max-width: 968px) {
    .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-secondary);
        padding: 2rem;
        border-bottom: 1px solid var(--border-color);
        gap: 1.5rem;
        z-index: 999;
    }
    .hero-visual {
        flex-direction: column;
        align-items: center;
    }
    .avatar-card {
        order: -1;
    }
    .timeline-header {
        flex-direction: column;
    }
    .footer-inner {
        flex-direction: column;
        text-align: center;
    }
    .hero-buttons {
        flex-wrap: wrap;
    }
}

/* =============================================
   Code Line Animation (moved from JS)
   ============================================= */
.code-line {
    display: block;
    animation: fadeIn 0.5s ease forwards;
    opacity: 0;
}
@keyframes fadeIn {
    to { opacity: 1; }
}

/* =============================================
   Typewriter Cursor on Hero Title
   ============================================= */
.title .cursor {
    display: inline-block;
    width: 3px;
    height: 1em;
    background: var(--accent-secondary);
    margin-left: 4px;
    vertical-align: middle;
    animation: blink 0.8s step-end infinite;
}
@keyframes blink {
    50% { opacity: 0; }
}

/* =============================================
   Scroll-triggered Animation Classes (set via JS)
   ============================================= */
.js-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.js-animate.visible {
    opacity: 1;
    transform: translateY(0);
}