:root {
  --bg:           #121212;
  --bg-panel:     #1A1A1A;
  --bg-panel-2:   #1F1F1F;
  --line:         rgba(255, 255, 255, 0.10);
  --line-strong:  rgba(255, 255, 255, 0.20);

  --accent:       #00ADB5;
  --accent-soft:  rgba(0, 173, 181, 0.14);
  --accent-glow:  rgba(0, 173, 181, 0.35);

  --text:         #FFFFFF;
  --text-mid:     rgba(255, 255, 255, 0.72);
  --text-dim:     rgba(255, 255, 255, 0.50);

  --font-body: 'Inter', sans-serif;

  --max-w: 1180px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text-mid);
  font-family: var(--font-body);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, textarea { font: inherit; }

h1, h2, h3, h4 {
  font-family: var(--font-body);
  color: var(--text);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.01em;
}

strong { color: var(--text); font-weight: 600; }

::selection { background: var(--accent-soft); color: var(--text); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.loader {
  position: fixed; inset: 0; z-index: 9999;
  background: var(--bg);
  display: flex; align-items: center; justify-content: center;
  transition: opacity 0.6s var(--ease), visibility 0.6s var(--ease);
}
.loader.hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.loader-inner { display: flex; flex-direction: column; align-items: center; gap: 16px; }
.loader-logo {
  width: 56px; height: 56px; border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 1.2rem; color: var(--text);
  background: linear-gradient(135deg, var(--accent), #007A80);
  box-shadow: 0 0 30px var(--accent-glow);
}
.loader-bar-track {
  width: 200px; height: 3px; background: var(--line); border-radius: 2px; overflow: hidden;
}
.loader-bar-fill {
  height: 100%; width: 0%; background: var(--accent);
  animation: loaderFill 1.4s var(--ease) forwards;
}
@keyframes loaderFill { to { width: 100%; } }
.loader-status { font-size: 0.8rem; color: var(--text-dim); }

.scroll-progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 0%;
  background: var(--accent);
  z-index: 1001;
  box-shadow: 0 0 10px var(--accent-glow);
  transition: width 0.1s linear;
}

.ambient-bg {
  position: fixed; inset: 0; z-index: 0; overflow: hidden; pointer-events: none;
}
.ambient-blob {
  position: absolute; border-radius: 50%; filter: blur(90px); opacity: 0.18;
  background: var(--accent);
  animation: floatBlob 18s ease-in-out infinite;
}
.blob-1 { width: 420px; height: 420px; top: -100px; left: -80px; animation-duration: 22s; }
.blob-2 { width: 520px; height: 520px; top: 40%; right: -160px; animation-duration: 26s; animation-delay: -6s; }
.blob-3 { width: 380px; height: 380px; bottom: -140px; left: 30%; animation-duration: 20s; animation-delay: -12s; }

@keyframes floatBlob {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(40px, -30px) scale(1.08); }
  66% { transform: translate(-30px, 30px) scale(0.94); }
}

.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 18px 0;
  transition: padding 0.3s var(--ease), background 0.3s var(--ease), border-color 0.3s var(--ease);
  border-bottom: 1px solid transparent;
}
.navbar.scrolled {
  padding: 12px 0;
  background: rgba(18, 18, 18, 0.82);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: var(--max-w); margin: 0 auto; padding: 0 28px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.nav-brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 0.85rem; color: var(--text);
  background: linear-gradient(135deg, var(--accent), #007A80);
}
.brand-name { font-weight: 600; font-size: 0.95rem; color: var(--text); }

.nav-links { display: flex; gap: 28px; }
.nav-link {
  position: relative; font-size: 0.9rem; color: var(--text-mid);
  transition: color 0.2s ease;
  padding-bottom: 4px;
}
.nav-link::after {
  content: ''; position: absolute; left: 0; right: 100%; bottom: 0; height: 2px;
  background: var(--accent); transition: right 0.25s var(--ease);
}
.nav-link:hover, .nav-link.active { color: var(--text); }
.nav-link:hover::after, .nav-link.active::after { right: 0; }

.nav-cta {
  font-size: 0.85rem; font-weight: 600; padding: 10px 20px;
  border-radius: 30px; color: var(--bg); background: var(--accent);
  transition: transform 0.25s var(--ease), box-shadow 0.25s ease;
  white-space: nowrap;
}
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 10px 24px var(--accent-glow); }

.nav-toggle { display: none; flex-direction: column; gap: 5px; width: 26px; }
.nav-toggle span { height: 2px; width: 100%; background: var(--text); border-radius: 2px; transition: transform 0.25s ease, opacity 0.25s ease; }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

main { position: relative; z-index: 1; }

.section { padding: 120px 0; position: relative; }
.section-alt { background: linear-gradient(180deg, rgba(26,26,26,0) 0%, rgba(26,26,26,0.55) 12%, rgba(26,26,26,0.55) 88%, rgba(26,26,26,0) 100%); }
.section-inner { max-width: var(--max-w); margin: 0 auto; padding: 0 28px; }

.section-eyebrow {
  font-size: 0.82rem; font-weight: 600; color: var(--accent);
  letter-spacing: 0.06em; text-transform: uppercase; margin-bottom: 12px;
}
.section-title { font-size: clamp(1.8rem, 3.4vw, 2.6rem); margin-bottom: 16px; }
.section-lead { color: var(--text-dim); max-width: 60ch; margin-bottom: 48px; font-size: 1.02rem; }

.card-glass {
  background: linear-gradient(180deg, rgba(255,255,255,0.045), rgba(255,255,255,0.015));
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(14px);
}

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-size: 0.92rem; font-weight: 600;
  padding: 14px 28px; border-radius: 30px;
  transition: transform 0.25s var(--ease), box-shadow 0.25s ease, border-color 0.25s ease, background 0.25s ease;
}
.btn-primary {
  background: var(--accent); color: var(--bg);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 30px var(--accent-glow); }
.btn-ghost { border: 1px solid var(--line-strong); color: var(--text); }
.btn-ghost:hover { border-color: var(--accent); background: var(--accent-soft); transform: translateY(-2px); }
.btn-full { width: 100%; }
.btn-small { padding: 10px 20px; font-size: 0.8rem; }

.reveal {
  opacity: 0; transform: translateY(26px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
.reveal.in-view { opacity: 1; transform: translateY(0); }

.hero {
  min-height: 100vh; display: flex; flex-direction: column; justify-content: center;
  padding: 150px 0 60px; position: relative;
}
.hero-inner {
  max-width: var(--max-w); margin: 0 auto; padding: 0 28px;
  display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 60px; align-items: center;
  width: 100%;
}
.hero-card {
  background: linear-gradient(180deg, rgba(255,255,255,0.05), rgba(255,255,255,0.015));
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(18px);
  padding: 48px;
}
.hero-title { font-size: clamp(2.4rem, 5.4vw, 3.8rem); margin-top: 4px; margin-bottom: 12px; }
.hero-role { font-size: clamp(1.05rem, 2vw, 1.25rem); color: var(--accent); font-weight: 600; margin-bottom: 20px; }
.hero-tagline { max-width: 56ch; font-size: 1.04rem; color: var(--text-mid); margin-bottom: 34px; }
.hero-cta-row { display: flex; gap: 16px; margin-bottom: 46px; flex-wrap: wrap; }

.hero-stats { display: grid; grid-template-columns: repeat(3, auto); gap: 34px; }
.hero-stat { display: flex; flex-direction: column; }
.stat-num { font-size: 1.8rem; color: var(--text); font-weight: 800; }
.stat-label { font-size: 0.75rem; color: var(--text-dim); margin-top: 2px; }

.hero-visual { display: flex; justify-content: center; align-items: center; }
.tech-orbit { position: relative; width: min(360px, 100%); aspect-ratio: 1/1; }
.orbit-core {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 92px; height: 92px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #007A80);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 0 50px var(--accent-glow);
  z-index: 2;
}
.orbit-core-icon { font-size: 2.2rem; }
.orbit-ring {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  border: 1px dashed var(--line-strong); border-radius: 50%;
}
.ring-a { width: 70%; height: 70%; animation: spin 26s linear infinite; }
.ring-b { width: 100%; height: 100%; animation: spin 40s linear infinite reverse; }
@keyframes spin { to { transform: translate(-50%, -50%) rotate(360deg); } }

.tech-icon {
  position: absolute; width: 52px; height: 52px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center; font-size: 1.4rem;
  background: rgba(255,255,255,0.06); border: 1px solid var(--line);
  backdrop-filter: blur(8px);
  animation: floatIcon 6s ease-in-out infinite;
}
.icon-1 { top: 4%; left: 46%; animation-delay: 0s; }
.icon-2 { top: 28%; right: 2%; animation-delay: 1s; }
.icon-3 { bottom: 24%; right: 8%; animation-delay: 2s; }
.icon-4 { bottom: 2%; left: 40%; animation-delay: 3s; }
.icon-5 { top: 30%; left: 0%; animation-delay: 4s; }
@keyframes floatIcon {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.scroll-cue {
  position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%);
  width: 26px; height: 42px; border: 1px solid var(--line-strong); border-radius: 20px;
  display: flex; justify-content: center; padding-top: 8px;
}
.scroll-cue span {
  width: 4px; height: 8px; border-radius: 2px; background: var(--accent);
  animation: scrollCue 1.8s ease-in-out infinite;
}
@keyframes scrollCue {
  0% { transform: translateY(0); opacity: 1; }
  70% { transform: translateY(12px); opacity: 0; }
  100% { opacity: 0; }
}

.about-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 56px; align-items: start; }
.about-text p { margin-bottom: 18px; }
.about-focus { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.focus-chip {
  font-size: 0.8rem; font-weight: 500; padding: 8px 16px;
  border: 1px solid var(--line); border-radius: 20px; color: var(--accent);
  background: var(--accent-soft);
}

.id-card { padding: 26px; }
.id-row {
  display: flex; justify-content: space-between; gap: 12px;
  padding: 12px 0; border-bottom: 1px solid var(--line);
  font-size: 0.88rem;
}
.id-row:last-of-type { border-bottom: none; }
.id-row span:first-child { color: var(--text-dim); font-size: 0.72rem; letter-spacing: 0.05em; font-weight: 600; }
.id-row span:last-child { color: var(--text); text-align: right; }
.status-active { display: flex; align-items: center; gap: 6px; color: var(--accent) !important; }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 8px var(--accent); }

.skills-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.skill-card {
  padding: 26px; border-radius: var(--radius-md); border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.01));
  transition: transform 0.3s var(--ease), border-color 0.3s ease, box-shadow 0.3s ease;
}
.skill-card:hover {
  transform: translateY(-6px); border-color: var(--line-strong);
  box-shadow: 0 20px 50px rgba(0,0,0,0.35), 0 0 0 1px var(--accent-soft);
}
.skill-card-head { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.skill-icon { font-size: 1.4rem; }
.skill-card h3 { font-size: 1.02rem; }
.skill-tags { margin-bottom: 20px; }
.skill-tags li {
  font-size: 0.86rem; color: var(--text-mid); padding: 5px 0;
  border-bottom: 1px dashed var(--line);
}
.skill-tags li:last-child { border-bottom: none; }
.skill-bar { height: 4px; border-radius: 2px; background: var(--line); overflow: hidden; }
.skill-bar-fill {
  height: 100%; width: 0%; border-radius: 2px;
  background: var(--accent);
  transition: width 1.4s var(--ease);
}

.cert-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.cert-card {
  display: flex; flex-direction: column; gap: 16px;
  padding: 30px; border-radius: var(--radius-md); border: 1px solid var(--line);
  background: linear-gradient(160deg, var(--accent-soft), rgba(255,255,255,0.02));
  position: relative; overflow: hidden;
  transition: transform 0.3s var(--ease), box-shadow 0.3s ease;
}
.cert-card:hover { transform: translateY(-6px); box-shadow: 0 20px 50px rgba(0,0,0,0.35); }
.cert-badge {
  width: 56px; height: 56px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 0.85rem;
  border: 1px solid var(--line-strong); color: var(--accent);
  background: var(--accent-soft);
}
.cert-body h3 { font-size: 1.08rem; margin-bottom: 6px; }
.cert-org { color: var(--accent); font-size: 0.85rem; margin-bottom: 2px; font-weight: 500; }
.cert-date { font-size: 0.78rem; color: var(--text-dim); margin-bottom: 12px; }
.cert-desc { font-size: 0.9rem; }
.cert-link { font-size: 0.85rem; font-weight: 600; color: var(--accent); align-self: flex-start; }
.cert-link:hover { text-decoration: underline; }

.project-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.project-card {
  border-radius: var(--radius-md); border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.01));
  transition: transform 0.35s var(--ease), border-color 0.3s ease, box-shadow 0.35s ease;
  overflow: hidden;
}
.project-card:hover {
  transform: translateY(-8px);
  border-color: var(--accent-glow);
  box-shadow: 0 24px 60px rgba(0,0,0,0.4), 0 0 40px var(--accent-soft);
}
.project-media {
  height: 140px; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--accent-soft), rgba(255,255,255,0.02));
  border-bottom: 1px solid var(--line);
}
.project-media-icon { font-size: 2.6rem; }
.project-body { padding: 26px 30px 30px; }
.project-tag {
  font-size: 0.72rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em;
  color: var(--accent); border: 1px solid var(--line); padding: 4px 12px; border-radius: 20px;
  display: inline-block; margin-bottom: 14px;
}
.project-card h3 { font-size: 1.15rem; margin-bottom: 12px; }
.project-card p { font-size: 0.92rem; margin-bottom: 18px; }
.project-stack { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 22px; }
.project-stack span {
  font-size: 0.74rem; padding: 5px 12px; border-radius: 6px;
  background: rgba(255,255,255,0.05); color: var(--text-mid); border: 1px solid var(--line);
}
.project-links { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.project-link { font-size: 0.82rem; color: var(--accent); font-weight: 600; }
.project-link:hover { text-decoration: underline; }
.project-link-disabled { color: var(--text-dim); pointer-events: none; font-size: 0.82rem; }

.edu-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.edu-grid-single { grid-template-columns: minmax(0, 640px); justify-content: start; }
.edu-card {
  padding: 30px; border-radius: var(--radius-md); border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.01));
  transition: transform 0.3s var(--ease), box-shadow 0.3s ease;
}
.edu-card:hover { transform: translateY(-6px); box-shadow: 0 20px 50px rgba(0,0,0,0.3); }
.edu-card h3 { font-size: 1.2rem; margin-bottom: 10px; }
.edu-school { font-size: 0.92rem; color: var(--accent); font-weight: 600; margin-bottom: 4px; }
.edu-institute { color: var(--text-mid); font-weight: 500; margin-bottom: 16px; }
.edu-note { font-size: 0.9rem; }

.achieve-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.achieve-card {
  padding: 24px; text-align: center; border-radius: var(--radius-md); border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.01));
  transition: transform 0.3s var(--ease), box-shadow 0.3s ease;
}
.achieve-card:hover { transform: translateY(-6px) scale(1.02); box-shadow: 0 20px 45px rgba(0,0,0,0.3); }
.achieve-icon { font-size: 1.8rem; display: block; margin-bottom: 14px; }
.achieve-card h3 { font-size: 0.96rem; margin-bottom: 8px; }
.achieve-card p { font-size: 0.84rem; }

.contact-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 50px; }
.contact-info { display: flex; flex-direction: column; gap: 14px; }
.contact-item {
  display: flex; align-items: center; gap: 16px; padding: 18px 20px;
  border: 1px solid var(--line); border-radius: var(--radius-md);
  transition: border-color 0.25s ease, background 0.25s ease, transform 0.25s ease;
}
.contact-item:hover { border-color: var(--accent); background: var(--accent-soft); transform: translateX(4px); }
.contact-icon { font-size: 1.3rem; }
.contact-label { display: block; font-size: 0.72rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.05em; font-weight: 600; }
.contact-value { display: block; color: var(--text); font-size: 0.95rem; margin-top: 2px; }

.contact-form { padding: 30px; border: 1px solid var(--line); border-radius: var(--radius-md); background: rgba(255,255,255,0.03); }
.form-row { margin-bottom: 18px; display: flex; flex-direction: column; gap: 8px; }
.form-row label { font-size: 0.78rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.04em; font-weight: 600; }
.form-row input, .form-row textarea {
  background: rgba(255,255,255,0.04); border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: 12px 14px; color: var(--text); resize: vertical;
  transition: border-color 0.2s ease, background 0.2s ease;
}
.form-row input:focus, .form-row textarea:focus { border-color: var(--accent); background: rgba(255,255,255,0.06); outline: none; }
.form-status { margin-top: 14px; font-size: 0.85rem; min-height: 1.2em; color: var(--accent); }

.footer { border-top: 1px solid var(--line); padding: 40px 0; position: relative; z-index: 1; }
.footer-inner { max-width: var(--max-w); margin: 0 auto; padding: 0 28px; text-align: center; }
.footer-brand { font-weight: 700; color: var(--text); margin-bottom: 14px; }
.footer-socials { display: flex; justify-content: center; gap: 22px; margin-bottom: 14px; }
.footer-socials a { font-size: 0.85rem; color: var(--text-mid); transition: color 0.2s ease; }
.footer-socials a:hover { color: var(--accent); }
.footer-line, .footer-copy { font-size: 0.82rem; color: var(--text-dim); }
.footer-line { margin-bottom: 6px; }

.back-to-top {
  position: fixed; bottom: 28px; right: 28px; z-index: 90;
  width: 46px; height: 46px; border-radius: 50%;
  background: var(--bg-panel); border: 1px solid var(--line-strong); color: var(--text);
  display: flex; align-items: center; justify-content: center; font-size: 1.1rem;
  opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease, border-color 0.3s ease;
}
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { border-color: var(--accent); box-shadow: 0 0 20px var(--accent-glow); }

@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 50px; }
  .hero-visual { order: -1; }
  .tech-orbit { width: min(280px, 70vw); }
  .about-grid { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .edu-grid { grid-template-columns: 1fr; }
  .edu-grid-single { grid-template-columns: 1fr; }
  .achieve-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 860px) {
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .nav-links.open {
    display: flex; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0;
    background: rgba(18,18,18,0.97); backdrop-filter: blur(16px);
    padding: 20px 28px; gap: 18px; border-bottom: 1px solid var(--line);
  }
  .cert-grid, .project-grid { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: repeat(3, 1fr); row-gap: 20px; }
  .hero-card { padding: 34px 26px; }
}

@media (max-width: 600px) {
  .section { padding: 90px 0; }
  .hero { padding-top: 130px; }
  .skills-grid { grid-template-columns: 1fr; }
  .achieve-grid { grid-template-columns: 1fr; }
  .hero-cta-row { flex-direction: column; align-items: stretch; }
  .hero-stats { grid-template-columns: repeat(3, 1fr); gap: 14px; }
  .stat-num { font-size: 1.4rem; }
}