/* ===== Variables ===== */
:root {
  --bg: #06080f;
  --bg-alt: #0a0e1a;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-strong: rgba(255, 255, 255, 0.07);
  --border: rgba(255, 255, 255, 0.08);
  --text: #e7eaf2;
  --text-dim: #9aa3b8;
  --blue: #00d4ff;
  --cyan: #2cffe0;
  --purple: #a855f7;
  --gradient: linear-gradient(135deg, var(--blue), var(--purple));
  --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.15);
  --radius: 16px;
  --transition: 0.3s ease;
  --font-main: 'Space Grotesk', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-main);
  overflow-x: hidden;
  line-height: 1.6;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.glass {
  background: var(--surface);
  border: 1px solid var(--border);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-radius: var(--radius);
}
.accent { color: var(--blue); }

/* ===== Preloader ===== */
#preloader {
  position: fixed; inset: 0; z-index: 9999;
  background: var(--bg);
  display: flex; align-items: center; justify-content: center;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}
#preloader.hidden { opacity: 0; visibility: hidden; }
.loader-content { font-family: var(--font-mono); font-size: clamp(1.2rem, 4vw, 2rem); color: var(--blue); }
.loader-bracket { color: var(--purple); }
.loader-text::after { content: '|'; animation: blink 0.8s step-start infinite; }

/* ===== Particle Canvas ===== */
#particle-canvas {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  z-index: -2; background: radial-gradient(ellipse at top, #0a1024, var(--bg) 70%);
}
.cursor-glow {
  position: fixed; width: 320px; height: 320px; border-radius: 50%;
  background: radial-gradient(circle, rgba(0,212,255,0.08), transparent 70%);
  pointer-events: none; z-index: -1; transform: translate(-50%, -50%);
  transition: opacity 0.3s;
  display: none;
}
@media (min-width: 992px) { .cursor-glow { display: block; } }

/* ===== Navbar ===== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(6, 8, 15, 0.55);
  border-bottom: 1px solid var(--border);
  border-radius: 0;
  transition: var(--transition);
}
.nav-container {
  max-width: 1200px; margin: 0 auto; padding: 16px 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.logo { font-family: var(--font-mono); font-weight: 600; font-size: 1.1rem; white-space: nowrap; }
.logo-bracket { color: var(--purple); }
.nav-links { display: flex; gap: 28px; flex: 1; justify-content: center; }
.nav-link {
  font-size: 0.92rem; color: var(--text-dim); position: relative; transition: var(--transition);
}
.nav-link::after {
  content: ''; position: absolute; left: 0; bottom: -6px; width: 0; height: 2px;
  background: var(--gradient); transition: width 0.3s;
}
.nav-link:hover, .nav-link.active { color: var(--text); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }
.nav-cta { white-space: nowrap; }
.hamburger { display: none; flex-direction: column; gap: 5px; z-index: 1100; }
.hamburger span { width: 24px; height: 2px; background: var(--text); transition: var(--transition); }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 24px; border-radius: 10px; font-weight: 600; font-size: 0.92rem;
  transition: var(--transition); cursor: pointer; white-space: nowrap;
}
.btn-primary { background: var(--gradient); color: #03060f; box-shadow: var(--shadow-glow); }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 0 40px rgba(0, 212, 255, 0.35); }
.btn-outline { border: 1px solid var(--border); color: var(--text); }
.btn-outline:hover { border-color: var(--blue); color: var(--blue); transform: translateY(-3px); }
.btn-ghost { color: var(--text-dim); }
.btn-ghost:hover { color: var(--text); }
.full-width { width: 100%; justify-content: center; }
.btn-sm {
  display: inline-flex; align-items: center; gap: 6px; font-size: 0.8rem; font-weight: 600;
  padding: 8px 14px; border: 1px solid var(--border); border-radius: 8px; color: var(--text-dim);
  transition: var(--transition);
}
.btn-sm:hover { color: var(--blue); border-color: var(--blue); }

/* ===== Hero ===== */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  padding-top: 110px; padding-bottom: 60px;
}
.hero-grid-overlay {
  position: absolute; inset: 0; z-index: -1;
  background-image: linear-gradient(rgba(0,212,255,0.05) 1px, transparent 1px), linear-gradient(90deg, rgba(0,212,255,0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 30% 30%, black, transparent 70%);
}
.hero-container {
  display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center;
}
.hero-greet {
  font-family: var(--font-mono); color: var(--cyan); font-size: 0.85rem; margin-bottom: 18px;
  display: flex; align-items: center; gap: 8px;
}
.terminal-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 10px var(--cyan); animation: pulse 1.6s infinite; }
.hero-title { font-size: clamp(2.2rem, 5vw, 3.4rem); font-weight: 700; line-height: 1.15; margin-bottom: 12px; }
.hero-role { font-size: clamp(1.1rem, 2.4vw, 1.5rem); color: var(--text-dim); font-weight: 500; margin-bottom: 18px; min-height: 2.2em; }
#typedRole { color: var(--blue); }
.cursor-blink { animation: blink 0.8s step-start infinite; color: var(--purple); }
.hero-sub { color: var(--text-dim); max-width: 520px; margin-bottom: 30px; font-size: 1.02rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 48px; }
.hero-stats { display: grid; grid-template-columns: repeat(4, auto); gap: 32px; }
.stat { font-family: var(--font-mono); }
.stat-num { font-size: 1.8rem; font-weight: 700; color: var(--blue); }
.stat-plus { font-size: 1.4rem; color: var(--purple); font-weight: 700; }
.stat p { font-size: 0.78rem; color: var(--text-dim); margin-top: 4px; }

.hero-visual { position: relative; display: flex; justify-content: center; }
.hero-card { width: 100%; max-width: 420px; padding: 0; overflow: hidden; position: relative; z-index: 2; }
.terminal-bar { display: flex; align-items: center; gap: 8px; padding: 12px 16px; border-bottom: 1px solid var(--border); }
.t-dot { width: 10px; height: 10px; border-radius: 50%; }
.t-dot.red { background: #ff5f57; } .t-dot.yellow { background: #febc2e; } .t-dot.green { background: #28c840; }
.terminal-title { margin-left: 8px; font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-dim); }
.terminal-body { padding: 20px; font-family: var(--font-mono); font-size: 0.82rem; line-height: 1.7; overflow-x: auto; }
.tk-key { color: var(--purple); } .tk-var { color: var(--blue); } .tk-prop { color: var(--cyan); }
.tk-str { color: #ffd479; } .tk-comment { color: var(--text-dim); }
.orbit-ring {
  position: absolute; width: 480px; height: 480px; border: 1px dashed rgba(0,212,255,0.15);
  border-radius: 50%; top: 50%; left: 50%; transform: translate(-50%, -50%);
  animation: spin 30s linear infinite; z-index: 1;
}
.scroll-indicator {
  position: absolute; bottom: 18px; left: 50%; transform: translateX(-50%);
  width: 26px; height: 42px; border: 2px solid var(--border); border-radius: 14px;
}
.scroll-indicator span {
  position: absolute; top: 6px; left: 50%; width: 4px; height: 8px; margin-left: -2px;
  background: var(--blue); border-radius: 2px; animation: scrollDown 1.6s infinite;
}

/* ===== Sections ===== */
.section { padding: 110px 0; position: relative; }
.section-alt { background: linear-gradient(180deg, transparent, rgba(168,85,247,0.03), transparent); }
.section-tag {
  font-family: var(--font-mono); color: var(--purple); font-size: 0.85rem; margin-bottom: 12px;
  letter-spacing: 0.5px;
}
.section-title { font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 700; margin-bottom: 18px; }
.section-desc { color: var(--text-dim); max-width: 620px; margin-bottom: 50px; }

.grid { display: grid; gap: 28px; }

/* ===== About ===== */
.about-grid { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 60px; align-items: center; }
.avatar-frame {
  position: relative; aspect-ratio: 1; max-width: 360px; margin: 0 auto;
  display: flex; align-items: center; justify-content: center; overflow: visible;
}
.avatar-initials {
  font-family: var(--font-mono); font-size: 5rem; font-weight: 700;
  background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.badge-float {
  position: absolute; width: 56px; height: 56px; border-radius: 50%;
  background: var(--surface-strong); border: 1px solid var(--border); backdrop-filter: blur(10px);
  display: flex; align-items: center; justify-content: center; font-size: 1.4rem; color: var(--blue);
  animation: floatY 4s ease-in-out infinite;
}
.badge-1 { top: -10px; right: 10px; animation-delay: 0s; }
.badge-2 { bottom: 30px; left: -20px; animation-delay: 1s; color: var(--purple); }
.badge-3 { bottom: -10px; right: 40px; animation-delay: 2s; color: var(--cyan); }
.about-content p { color: var(--text-dim); margin-bottom: 16px; }
.about-tags { display: flex; flex-wrap: wrap; gap: 10px; margin: 24px 0; }
.chip {
  font-size: 0.8rem; padding: 8px 14px; border-radius: 20px; border: 1px solid var(--border);
  color: var(--text); background: var(--surface);
}

/* ===== Services ===== */
.services-grid { grid-template-columns: repeat(3, 1fr); }
.service-card { padding: 32px 26px; transition: var(--transition); }
.service-card:hover { transform: translateY(-8px); border-color: rgba(0,212,255,0.4); box-shadow: var(--shadow-glow); }
.service-icon {
  width: 56px; height: 56px; border-radius: 12px; background: var(--gradient);
  display: flex; align-items: center; justify-content: center; font-size: 1.4rem; color: #03060f;
  margin-bottom: 18px;
}
.service-card h3 { font-size: 1.1rem; margin-bottom: 10px; }
.service-card p { color: var(--text-dim); font-size: 0.92rem; }

/* ===== Skills (tabbed rings) ===== */
.skill-tabs { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 44px; }
.skill-tab {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 22px; border-radius: 24px; border: 1px solid var(--border); color: var(--text-dim);
  font-size: 0.88rem; font-weight: 600; transition: var(--transition);
}
.skill-tab.active, .skill-tab:hover { color: #03060f; background: var(--gradient); border-color: transparent; }
.skill-panel { display: none; }
.skill-panel.active { display: block; }
.skill-ring-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 24px; }
.skill-ring-item {
  text-align: center; padding: 26px 12px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--border); transition: var(--transition);
}
.skill-ring-item:hover { transform: translateY(-6px); border-color: rgba(0,212,255,0.35); box-shadow: var(--shadow-glow); }
.skill-ring {
  width: 84px; height: 84px; border-radius: 50%; margin: 0 auto 14px; position: relative;
  background: conic-gradient(var(--blue) calc(var(--p) * 1%), rgba(255,255,255,0.07) 0);
  display: flex; align-items: center; justify-content: center;
}
.skill-ring::before { content: ''; position: absolute; inset: 7px; border-radius: 50%; background: var(--bg); }
.skill-ring i { position: relative; z-index: 1; font-size: 1.5rem; color: var(--text); }
.skill-ring-item h4 { font-size: 0.88rem; margin-bottom: 4px; }
.skill-ring-item span { font-size: 0.78rem; color: var(--blue); font-family: var(--font-mono); }

/* ===== Certifications ===== */
.cert-grid { grid-template-columns: repeat(4, 1fr); }
.cert-card { padding: 30px 24px; text-align: center; transition: var(--transition); }
.cert-card:hover { transform: translateY(-8px); border-color: rgba(168,85,247,0.4); box-shadow: var(--shadow-glow); }
.cert-icon {
  width: 56px; height: 56px; border-radius: 12px; background: var(--gradient); margin: 0 auto 18px;
  display: flex; align-items: center; justify-content: center; font-size: 1.5rem; color: #03060f;
}
.cert-card h3 { font-size: 0.98rem; margin-bottom: 8px; }
.cert-issuer { color: var(--text-dim); font-size: 0.82rem; margin-bottom: 14px; }
.cert-id {
  display: inline-block; font-family: var(--font-mono); font-size: 0.72rem; color: var(--cyan);
  border: 1px solid rgba(44,255,224,0.25); border-radius: 12px; padding: 5px 12px;
}

/* ===== Experience Timeline ===== */
.timeline { position: relative; padding-left: 44px; }
.timeline::before {
  content: ''; position: absolute; left: 9px; top: 6px; bottom: 6px; width: 2px;
  background: linear-gradient(var(--blue), var(--purple));
}
.timeline-item { position: relative; margin-bottom: 36px; }
.timeline-item:last-child { margin-bottom: 0; }
.timeline-dot {
  position: absolute; left: -44px; top: 28px; width: 20px; height: 20px; border-radius: 50%;
  background: var(--bg-alt); border: 2px solid var(--blue);
}
.timeline-item.current .timeline-dot { border-color: var(--cyan); box-shadow: 0 0 14px var(--cyan); animation: pulse 1.6s infinite; }
.timeline-content { padding: 28px 30px; }
.timeline-period {
  display: inline-flex; align-items: center; gap: 8px; font-family: var(--font-mono);
  font-size: 0.8rem; color: var(--cyan); margin-bottom: 10px;
}
.badge-current {
  background: var(--gradient); color: #03060f; padding: 2px 10px; border-radius: 10px;
  font-size: 0.68rem; font-weight: 700; letter-spacing: 0.3px;
}
.timeline-content h3 { font-size: 1.15rem; margin-bottom: 6px; }
.timeline-company { display: block; font-size: 0.88rem; color: var(--text-dim); margin-bottom: 16px; }
.timeline-company i { color: var(--purple); margin-right: 6px; }
.timeline-content ul { padding-left: 18px; color: var(--text-dim); font-size: 0.9rem; }
.timeline-content li { margin-bottom: 8px; }

/* ===== Projects ===== */
.filter-bar { display: flex; gap: 12px; margin-bottom: 40px; flex-wrap: wrap; }
.filter-btn {
  padding: 10px 20px; border-radius: 20px; border: 1px solid var(--border); color: var(--text-dim);
  font-size: 0.85rem; font-weight: 600; transition: var(--transition);
}
.filter-btn.active, .filter-btn:hover { color: #03060f; background: var(--gradient); border-color: transparent; }
.projects-grid { grid-template-columns: repeat(3, 1fr); }
.project-card { overflow: hidden; transition: var(--transition); display: flex; flex-direction: column; }
.project-card.hide { display: none; }
.project-card:hover { transform: translateY(-6px); border-color: rgba(168,85,247,0.4); }
.project-shot {
  height: 160px; display: flex; align-items: center; justify-content: center;
  font-size: 2.6rem; color: var(--blue);
  background: linear-gradient(135deg, rgba(0,212,255,0.08), rgba(168,85,247,0.08));
  border-bottom: 1px solid var(--border);
}
.project-body { padding: 24px; display: flex; flex-direction: column; flex: 1; }
.project-body h3 { margin-bottom: 8px; font-size: 1.08rem; }
.project-body p { color: var(--text-dim); font-size: 0.88rem; margin-bottom: 16px; flex: 1; }
.tech-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 18px; }
.tech-tags span {
  font-size: 0.72rem; padding: 4px 10px; border-radius: 12px; background: rgba(0,212,255,0.08);
  color: var(--cyan); border: 1px solid rgba(0,212,255,0.18);
}
.project-actions { display: flex; gap: 10px; }

/* ===== Why ===== */
.why-grid { grid-template-columns: repeat(3, 1fr); }
.why-card { padding: 30px; text-align: left; transition: var(--transition); }
.why-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-glow); }
.why-card i { font-size: 1.6rem; color: var(--purple); margin-bottom: 14px; }
.why-card h3 { font-size: 1rem; margin-bottom: 8px; }
.why-card p { color: var(--text-dim); font-size: 0.88rem; }

/* ===== Testimonials ===== */
.testimonial-track { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.testimonial-card { padding: 32px; position: relative; }
.quote-icon { color: var(--purple); opacity: 0.4; font-size: 1.4rem; margin-bottom: 14px; }
.testimonial-card p { color: var(--text-dim); font-size: 0.92rem; margin-bottom: 22px; font-style: italic; }
.testimonial-author { display: flex; align-items: center; gap: 12px; }
.author-avatar {
  width: 42px; height: 42px; border-radius: 50%; background: var(--gradient);
  display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 0.85rem; color: #03060f;
}
.testimonial-author strong { display: block; font-size: 0.9rem; }
.testimonial-author span { font-size: 0.78rem; color: var(--text-dim); }

/* ===== Contact ===== */
.contact-grid { display: grid; grid-template-columns: 1.3fr 0.9fr; gap: 36px; }
.contact-form { padding: 36px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 0.82rem; color: var(--text-dim); margin-bottom: 8px; }
.form-group input, .form-group textarea {
  width: 100%; padding: 13px 16px; border-radius: 10px; border: 1px solid var(--border);
  background: rgba(255,255,255,0.03); color: var(--text); font-family: var(--font-main); font-size: 0.92rem;
  transition: var(--transition); resize: vertical;
}
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px rgba(0,212,255,0.1); }
.form-status { margin-top: 14px; font-size: 0.85rem; color: var(--cyan); min-height: 1.2em; }
.contact-info { display: flex; flex-direction: column; gap: 16px; }
.contact-item {
  display: flex; align-items: center; gap: 16px; padding: 18px 20px; transition: var(--transition);
}
.contact-item:hover { border-color: var(--blue); transform: translateX(4px); }
.contact-item i { font-size: 1.3rem; color: var(--blue); width: 30px; text-align: center; }
.contact-item strong { display: block; font-size: 0.9rem; }
.contact-item span { font-size: 0.8rem; color: var(--text-dim); }
.contact-cta { padding: 20px; display: flex; align-items: center; gap: 14px; }
.contact-cta i { font-size: 1.4rem; color: var(--purple); }
.contact-cta p { font-size: 0.85rem; color: var(--text-dim); }

/* ===== Footer ===== */
.footer { border-top: 1px solid var(--border); padding: 60px 0 24px; background: var(--bg-alt); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-grid p { color: var(--text-dim); font-size: 0.88rem; margin-top: 12px; }
.footer-nav h4, .footer-social h4 { margin-bottom: 16px; font-size: 0.9rem; }
.footer-nav a { display: block; color: var(--text-dim); font-size: 0.88rem; margin-bottom: 10px; transition: var(--transition); }
.footer-nav a:hover { color: var(--blue); }
.social-icons { display: flex; gap: 12px; }
.social-icons a {
  width: 38px; height: 38px; border-radius: 50%; border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center; transition: var(--transition);
}
.social-icons a:hover { border-color: var(--blue); color: var(--blue); transform: translateY(-3px); }
.footer-bottom { text-align: center; padding-top: 24px; border-top: 1px solid var(--border); color: var(--text-dim); font-size: 0.82rem; }

.back-to-top {
  position: fixed; bottom: 28px; right: 28px; width: 46px; height: 46px; border-radius: 50%;
  background: var(--gradient); color: #03060f; display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transition: var(--transition); z-index: 900; box-shadow: var(--shadow-glow);
}
.back-to-top.visible { opacity: 1; pointer-events: auto; }
.back-to-top:hover { transform: translateY(-4px); }

/* ===== Reveal Animation ===== */
[data-aos] { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease, transform 0.7s ease; }
[data-aos].aos-visible { opacity: 1; transform: translateY(0); }

/* ===== Keyframes ===== */
@keyframes blink { 50% { opacity: 0; } }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }
@keyframes spin { to { transform: translate(-50%, -50%) rotate(360deg); } }
@keyframes floatY { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }
@keyframes scrollDown { 0% { opacity: 1; top: 6px; } 100% { opacity: 0; top: 22px; } }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .hero-container { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
  .about-grid { grid-template-columns: 1fr; }
  .services-grid, .why-grid, .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .skill-ring-grid { grid-template-columns: repeat(3, 1fr); }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .testimonial-track { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 860px) {
  .nav-links { position: fixed; top: 70px; left: 0; right: 0; flex-direction: column; gap: 0;
    background: rgba(6,8,15,0.97); border-bottom: 1px solid var(--border);
    max-height: 0; overflow: hidden; transition: max-height 0.35s ease; }
  .nav-links.open { max-height: 420px; }
  .nav-links li { width: 100%; }
  .nav-link { display: block; padding: 16px 24px; border-bottom: 1px solid var(--border); }
  .nav-cta { display: none; }
  .hamburger { display: flex; }
  .hero-stats { grid-template-columns: repeat(2, auto); row-gap: 24px; }
}
@media (max-width: 640px) {
  .services-grid, .why-grid, .projects-grid { grid-template-columns: 1fr; }
  .skill-ring-grid { grid-template-columns: repeat(2, 1fr); }
  .cert-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { justify-content: center; }
  .timeline { padding-left: 32px; }
  .timeline-dot { left: -32px; }
}