/* --- Base Styles --- */
:root {
  --bg-color: #0d0e15;
  --bg-gradient: linear-gradient(135deg, #0d0e15 0%, #1a1b26 50%, #2a2b38 100%);
  --text-primary: #f8f9fa;
  --text-secondary: #a1a1aa;
  --accent-color: #6366f1;
  --accent-hover: #4f46e5;
  --card-bg: rgba(255, 255, 255, 0.03);
  --card-border: rgba(255, 255, 255, 0.08);
  --font-main: 'Inter', sans-serif;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --glass-bg: rgba(13, 14, 21, 0.7);
  --glass-border: rgba(255, 255, 255, 0.1);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg-color: #f8f9fa;
    --bg-gradient: linear-gradient(135deg, #f8f9fa 0%, #e8eaf6 50%, #d1c4e9 100%);
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --card-bg: rgba(255, 255, 255, 0.6);
    --card-border: rgba(0, 0, 0, 0.05);
    --glass-bg: rgba(248, 249, 250, 0.7);
    --glass-border: rgba(0, 0, 0, 0.1);
  }
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-main); background: var(--bg-gradient); background-attachment: fixed; color: var(--text-primary); line-height: 1.6; overflow-x: hidden; -webkit-font-smoothing: antialiased; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; }
.section { padding: 6rem 0; overflow: hidden; }
.section-title { font-size: 2.5rem; font-weight: 700; margin-bottom: 3rem; text-align: center; background: linear-gradient(to right, var(--text-primary), var(--text-secondary)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }

.btn { display: inline-flex; align-items: center; justify-content: center; padding: 0.75rem 1.5rem; border-radius: 9999px; font-weight: 500; transition: var(--transition); cursor: pointer; border: none; font-family: var(--font-main); gap: 0.5rem; }
.btn-primary { background-color: var(--accent-color); color: white; }
.btn-primary:hover { background-color: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 10px 25px -5px rgba(99, 102, 241, 0.4); }
.btn-outline { background-color: transparent; color: var(--text-primary); border: 1px solid var(--text-primary); }
.btn-outline:hover { background-color: var(--text-primary); color: var(--bg-color); transform: translateY(-2px); }

/* --- Navbar --- */
.navbar { position: fixed; top: 0; left: 0; width: 100%; z-index: 100; padding: 1.5rem 0; transition: var(--transition); }
.navbar.scrolled { padding: 1rem 0; background: var(--glass-bg); backdrop-filter: blur(10px); border-bottom: 1px solid var(--glass-border); }
.nav-container { display: flex; justify-content: space-between; align-items: center; }
.nav-logo { font-size: 1.5rem; font-weight: 700; letter-spacing: -0.5px; }
.nav-logo span { color: var(--accent-color); }
.nav-menu { display: flex; gap: 2rem; }
.nav-link { font-weight: 500; font-size: 0.95rem; color: var(--text-secondary); transition: var(--transition); }
.nav-link:hover { color: var(--text-primary); }
.mobile-toggle { display: none; cursor: pointer; color: var(--text-primary); font-size: 1.5rem; }
.mobile-menu { position: absolute; top: 100%; left: 0; width: 100%; background: var(--glass-bg); backdrop-filter: blur(10px); padding: 1.5rem 2rem; display: flex; flex-direction: column; gap: 1.5rem; border-bottom: 1px solid var(--glass-border); transform: translateY(-20px); opacity: 0; pointer-events: none; transition: var(--transition); }
.mobile-menu.active { transform: translateY(0); opacity: 1; pointer-events: auto; }
.mobile-link { font-weight: 500; font-size: 1.1rem; color: var(--text-primary); }
@media (max-width: 768px) { .nav-menu { display: none; } .mobile-toggle { display: block; } }

/* --- Hero --- */
.hero-section { min-height: 100vh; display: flex; align-items: center; padding-top: 80px; }
.hero-container { display: flex; align-items: center; justify-content: space-between; gap: 4rem; }
.hero-content { flex: 1; max-width: 600px; }
.hero-greeting { font-size: 1.5rem; color: var(--accent-color); margin-bottom: 0.5rem; }
.hero-name { font-size: 4.5rem; font-weight: 800; line-height: 1.1; margin-bottom: 1rem; background: linear-gradient(to right, var(--text-primary), var(--text-secondary)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero-role { font-size: 2rem; font-weight: 600; color: var(--text-secondary); margin-bottom: 1.5rem; }
.hero-role .highlight { color: var(--text-primary); opacity: 0.8; }
.hero-desc { font-size: 1.1rem; color: var(--text-secondary); margin-bottom: 2.5rem; line-height: 1.8; }
.hero-cta { display: flex; gap: 1.5rem; }
.hero-image-wrapper { flex: 1; display: flex; justify-content: center; align-items: center; position: relative; }
.hero-blob { position: absolute; width: 400px; height: 400px; background: var(--accent-color); border-radius: 50%; filter: blur(100px); opacity: 0.2; z-index: 0; animation: pulse 4s infinite alternate; }
.hero-image { width: 350px; height: 350px; border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%; background: var(--card-bg); border: 2px solid var(--card-border); box-shadow: 0 25px 50px -12px rgba(0,0,0,0.25); z-index: 1; overflow: hidden; display: flex; align-items: center; justify-content: center; animation: morph 8s ease-in-out infinite; backdrop-filter: blur(10px); }
.hero-image img { width: 100%; height: 100%; object-fit: cover; }
@keyframes pulse { 0% { opacity: 0.2; transform: scale(0.95); } 100% { opacity: 0.4; transform: scale(1.05); } }
@keyframes morph { 0% { border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%; } 50% { border-radius: 30% 60% 70% 40% / 50% 60% 30% 60%; } 100% { border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%; } }
@media (max-width: 992px) { .hero-container { flex-direction: column-reverse; text-align: center; padding-top: 4rem; } .hero-cta { justify-content: center; } }
@media (max-width: 576px) { .hero-name { font-size: 2.8rem; } .hero-image { width: 250px; height: 250px; } }

/* --- About --- */
.about-content { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; }
.story-card { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 20px; padding: 3rem; box-shadow: 0 10px 30px rgba(0,0,0,0.1); backdrop-filter: blur(10px); }
.story-card h3 { font-size: 1.8rem; margin-bottom: 1.5rem; color: var(--accent-color); }
.story-card p { color: var(--text-secondary); margin-bottom: 1.5rem; font-size: 1.05rem; }
.personal-details { margin-top: 2rem; padding-top: 2rem; border-top: 1px solid var(--card-border); display: flex; flex-direction: column; gap: 1rem; }
.detail-item { display: flex; align-items: center; }
.detail-item .label { width: 120px; font-weight: 600; color: var(--text-primary); }
.detail-item .value { color: var(--text-secondary); }
.about-skills h3 { font-size: 1.8rem; margin-bottom: 2rem; color: var(--text-primary); }
.skills-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 1.5rem; }
.skill-item { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 12px; padding: 1.5rem 1rem; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 1rem; transition: var(--transition); cursor: pointer; }
.skill-item:hover { transform: translateY(-5px); background: rgba(255,255,255,0.05); box-shadow: 0 10px 20px rgba(0,0,0,0.1); }
@media (prefers-color-scheme: light) { .skill-item:hover { background: rgba(0,0,0,0.05); } }
.skill-icon { font-size: 3rem; }
.skill-name { font-weight: 500; color: var(--text-primary); text-align: center; }
@media (max-width: 992px) { .about-content { grid-template-columns: 1fr; } }

/* --- Projects --- */
.projects-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 2rem; }
.project-card { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 16px; overflow: hidden; display: flex; flex-direction: column; transition: var(--transition); position: relative; z-index: 1; }
.project-card::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: linear-gradient(to bottom right, rgba(99,102,241,0.1), transparent); z-index: -1; opacity: 0; transition: var(--transition); }
.project-card:hover { transform: translateY(-10px); box-shadow: 0 20px 40px rgba(0,0,0,0.2); border-color: rgba(99,102,241,0.3); }
.project-card:hover::before { opacity: 1; }
@media (prefers-color-scheme: light) { .project-card:hover { box-shadow: 0 20px 40px rgba(0,0,0,0.08); } }
.project-content { padding: 2.5rem; flex: 1; }
.project-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 1.5rem; }
.project-header h3 { font-size: 1.5rem; color: var(--text-primary); line-height: 1.3; }
.project-links { display: flex; gap: 1rem; }
.project-link { color: var(--text-secondary); font-size: 1.25rem; transition: var(--transition); }
.project-link:hover { color: var(--accent-color); }
.project-desc { color: var(--text-secondary); margin-bottom: 2rem; font-size: 1rem; }
.project-tech-list { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.project-tech-list li { font-family: monospace; font-size: 0.85rem; color: var(--accent-color); background: rgba(99,102,241,0.1); padding: 0.25rem 0.75rem; border-radius: 20px; }
.project-footer { padding: 0 2.5rem 2.5rem; }
.btn-view-project { display: flex; align-items: center; justify-content: center; width: 100%; padding: 0.8rem; background: transparent; color: var(--text-primary); border: 1px solid var(--card-border); border-radius: 8px; font-weight: 500; transition: var(--transition); cursor: pointer; }
.btn-view-project:hover { background: var(--accent-color); border-color: var(--accent-color); color: white; }

/* --- Services --- */
.services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }
.service-card { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 16px; padding: 3rem 2rem; text-align: center; transition: var(--transition); position: relative; overflow: hidden; z-index: 1; }
.service-card::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 4px; background: var(--accent-color); transform: scaleX(0); transform-origin: left; transition: transform 0.4s ease; z-index: -1; }
.service-card:hover { transform: translateY(-10px); box-shadow: 0 20px 40px rgba(0,0,0,0.1); background: rgba(255,255,255,0.05); }
@media (prefers-color-scheme: light) { .service-card:hover { background: rgba(0,0,0,0.02); } }
.service-card:hover::before { transform: scaleX(1); }
.service-icon { font-size: 3rem; color: var(--accent-color); margin-bottom: 1.5rem; display: inline-block; padding: 1rem; background: rgba(99,102,241,0.1); border-radius: 50%; transition: var(--transition); }
.service-card:hover .service-icon { transform: scale(1.1) rotate(5deg); background: var(--accent-color); color: white; }
.service-title { font-size: 1.5rem; color: var(--text-primary); margin-bottom: 1rem; }
.service-desc { color: var(--text-secondary); font-size: 1rem; line-height: 1.7; }

/* --- Education --- */
.timeline-container { max-width: 800px; margin: 0 auto; position: relative; padding: 2rem 0; }
.timeline-line { position: absolute; top: 0; bottom: 0; left: 30px; width: 2px; background: var(--card-border); z-index: 0; }
.timeline-item { position: relative; padding-left: 80px; margin-bottom: 4rem; }
.timeline-dot { position: absolute; left: 10px; top: 0; width: 42px; height: 42px; border-radius: 50%; background: var(--accent-color); color: white; display: flex; align-items: center; justify-content: center; font-size: 1.2rem; z-index: 1; box-shadow: 0 0 0 4px var(--bg-color), 0 0 15px rgba(99,102,241,0.5); transition: var(--transition); }
.timeline-item:hover .timeline-dot { transform: scale(1.1); background: white; color: var(--accent-color); }
.timeline-content { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 16px; padding: 2rem; box-shadow: 0 10px 30px rgba(0,0,0,0.05); transition: var(--transition); position: relative; }
.timeline-content::after { content: ''; position: absolute; top: 15px; left: -10px; border-width: 10px 10px 10px 0; border-style: solid; border-color: transparent var(--card-border) transparent transparent; }
.timeline-item:hover .timeline-content { transform: translateY(-5px); box-shadow: 0 15px 35px rgba(0,0,0,0.1); border-color: rgba(99,102,241,0.3); }
.timeline-date { display: inline-block; padding: 0.3rem 1rem; background: rgba(99,102,241,0.1); color: var(--accent-color); border-radius: 20px; font-size: 0.85rem; font-weight: 600; margin-bottom: 1rem; }
.timeline-title { font-size: 1.4rem; color: var(--text-primary); margin-bottom: 0.5rem; }
.timeline-institution { font-size: 1.1rem; color: var(--accent-color); font-weight: 500; margin-bottom: 1rem; }
.timeline-desc { color: var(--text-secondary); line-height: 1.7; }
@media (max-width: 768px) { .timeline-line { left: 20px; } .timeline-dot { left: 0; top: 5px; width: 40px; height: 40px; } .timeline-item { padding-left: 65px; } .timeline-content { padding: 1.5rem; } }

/* --- Contact --- */
.contact-content { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; }
.contact-info h3 { font-size: 2rem; color: var(--text-primary); margin-bottom: 1rem; }
.contact-info p { color: var(--text-secondary); font-size: 1.1rem; line-height: 1.7; margin-bottom: 2.5rem; }
.info-items { display: flex; flex-direction: column; gap: 1.5rem; margin-bottom: 2.5rem; }
.info-item { display: flex; align-items: center; gap: 1.5rem; }
.info-icon { width: 50px; height: 50px; border-radius: 50%; background: rgba(99,102,241,0.1); color: var(--accent-color); display: flex; align-items: center; justify-content: center; font-size: 1.5rem; transition: var(--transition); }
.info-item:hover .info-icon { background: var(--accent-color); color: white; transform: translateY(-3px); box-shadow: 0 5px 15px rgba(99,102,241,0.3); }
.info-text h4 { font-size: 0.9rem; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 0.3rem; }
.info-text a, .info-text span { font-size: 1.1rem; color: var(--text-primary); font-weight: 500; transition: var(--transition); }
.info-text a:hover { color: var(--accent-color); }
.social-links { display: flex; gap: 1rem; }
.social-link { width: 45px; height: 45px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.2rem; color: var(--text-secondary); background: var(--card-bg); border: 1px solid var(--card-border); transition: var(--transition); }
.social-link:hover { background: var(--accent-color); border-color: var(--accent-color); color: white; transform: translateY(-3px); box-shadow: 0 5px 15px rgba(99,102,241,0.3); }
.contact-form-container { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 20px; padding: 3rem; box-shadow: 0 10px 30px rgba(0,0,0,0.1); }
.contact-form { display: flex; flex-direction: column; gap: 1.5rem; }
.form-group { width: 100%; }
.form-control { width: 100%; padding: 1rem 1.5rem; background: rgba(255,255,255,0.03); border: 1px solid var(--card-border); border-radius: 10px; color: var(--text-primary); font-size: 1rem; font-family: inherit; transition: var(--transition); }
@media (prefers-color-scheme: light) { .form-control { background: rgba(0,0,0,0.02); } }
.form-control:focus { outline: none; border-color: var(--accent-color); background: transparent; box-shadow: 0 0 0 4px rgba(99,102,241,0.1); }
.form-control::placeholder { color: var(--text-secondary); opacity: 0.7; }
textarea.form-control { resize: vertical; min-height: 120px; }
.btn-submit { width: 100%; padding: 1rem; font-size: 1.1rem; margin-top: 0.5rem; }
@media (max-width: 992px) { .contact-content { grid-template-columns: 1fr; } .contact-form-container { padding: 2rem; } }

/* --- Footer --- */
.footer { padding: 3rem 0; border-top: 1px solid var(--card-border); background: var(--bg-color); margin-top: 4rem; }
.footer-container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1.5rem; }
.footer-logo { font-size: 1.2rem; font-weight: 700; color: var(--text-primary); }
.footer-logo span { color: var(--accent-color); }
.copyright { color: var(--text-secondary); font-size: 0.9rem; }
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a { color: var(--text-secondary); font-size: 0.9rem; transition: var(--transition); }
.footer-links a:hover { color: var(--accent-color); }
@media (max-width: 768px) { .footer-container { flex-direction: column; text-align: center; } }

/* --- Animations via JS Classes --- */
.reveal-up { opacity: 0; transform: translateY(40px); transition: all 0.8s ease-out; }
.reveal-up.active { opacity: 1; transform: translateY(0); }

.reveal-left { opacity: 0; transform: translateX(-40px); transition: all 0.8s ease-out; }
.reveal-left.active { opacity: 1; transform: translateX(0); }

.reveal-right { opacity: 0; transform: translateX(40px); transition: all 0.8s ease-out; }
.reveal-right.active { opacity: 1; transform: translateX(0); }

.fade-in { opacity: 0; transition: opacity 0.8s ease-in; }
.fade-in.active { opacity: 1; }

.delay-1 { transition-delay: 0.2s; }
.delay-2 { transition-delay: 0.4s; }
.delay-3 { transition-delay: 0.6s; }
.delay-4 { transition-delay: 0.8s; }