:root {
  --bg: #0a0a0a;
  --card: #141414;
  --card2: #1a1a1a;
  --cyan: #00e5ff;
  --cyan-dim: rgba(0, 229, 255, 0.1);
  --text: #f0f0f0;
  --muted: #888;
  --muted2: #555;
  --border: #222;
  --radius: 18px;
  --radius-sm: 10px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', sans-serif;
  overflow-x: hidden;
}

nav {
  position: fixed;
  top: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 0;
  background: rgba(20, 20, 20, 0.9);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: 50px;
  padding: 0.4rem 0.5rem;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

.nav-logo {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  padding: 0.4rem 1rem;
  margin-right: 0.5rem;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  gap: 0.1rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.8rem;
  color: var(--muted);
  text-decoration: none;
  padding: 0.45rem 1rem;
  border-radius: 50px;
  transition: color 0.2s, background 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
  background: var(--card2);
}

.nav-cta {
  margin-left: 0.5rem;
  background: var(--text);
  color: #000;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.45rem 1.1rem;
  border-radius: 50px;
  text-decoration: none;
  transition: opacity 0.2s;
  white-space: nowrap;
}

.nav-cta:hover {
  opacity: 0.85;
}

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

.section-wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 6rem 2rem;
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-header h2 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 700;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.section-header p {
  font-size: 0.9rem;
  color: var(--muted);
  font-weight: 500;
}

#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: left;
  padding: 8rem 2rem 4rem;
}

.hero-inner {
  max-width: 1100px;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4rem;
  align-items: center;
}

.hero-tag {
  font-size: 0.78rem;
  color: var(--muted);
  margin-bottom: 0.75rem;
  letter-spacing: 0.04em;
}

.hero-name {
  font-size: clamp(2.8rem, 6vw, 5.5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin-bottom: 1rem;
}

.hero-role {
  font-size: clamp(1rem, 2vw, 1.35rem);
  font-weight: 600;
  color: var(--cyan);
  margin-bottom: 1rem;
}

.hero-desc {
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.8;
  max-width: 500px;
  margin-bottom: 2rem;
}

.hero-btns {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.75rem 1.75rem;
  font-size: 0.82rem;
  font-weight: 600;
  background: var(--text);
  color: #000;
  border-radius: 50px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.2s;
}

.btn-primary:hover {
  opacity: 0.88;
  transform: translateY(-1px);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.75rem 1.75rem;
  font-size: 0.82rem;
  font-weight: 600;
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 50px;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
}

.btn-outline:hover {
  background: var(--card2);
  transform: translateY(-1px);
}

.hero-socials {
  display: flex;
  gap: 0.75rem;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color 0.2s, border-color 0.2s;
}

.social-link:hover {
  color: var(--text);
  border-color: var(--muted2);
}

.hero-stats-row {
  display: flex;
  gap: 2.5rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--border);
  margin-top: 2.5rem;
}

.hstat-num {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}

.hstat-label {
  font-size: 0.72rem;
  color: var(--muted);
  margin-top: 0.1rem;
}

.hero-badge-col {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: flex-end;
  justify-content: center;
}

.hero-badge {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  text-align: center;
  min-width: 140px;
}

.hero-badge-num {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: -0.02em;
}

.hero-badge-text {
  color: var(--text);
}

.hero-badge-small {
  font-size: 1rem;
  color: var(--muted);
}

.hero-badge-lbl {
  font-size: 0.7rem;
  color: var(--muted);
  margin-top: 0.2rem;
}

#about,
#skills,
#projects,
#education,
#achievements,
#contact {
  background: var(--bg);
}

.about-grid,
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}

.about-text-card,
.about-info-card,
.skill-card,
.proj-card,
.edu-card,
.ach-card,
.contact-link-item,
.contact-form-card {
  background: var(--card);
  border: 1px solid var(--border);
}

.about-text-card {
  border-radius: var(--radius);
  padding: 2.5rem;
}

.about-text-card p {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.85;
  margin-bottom: 1rem;
}

.about-text-card p:last-child {
  margin-bottom: 0;
}

.about-text-card p strong {
  color: var(--text);
  font-weight: 600;
}

.about-info-card {
  border-radius: var(--radius);
  padding: 2rem;
}

.about-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.83rem;
}

.about-row:last-child {
  border-bottom: none;
}

.about-row .lbl {
  color: var(--muted);
}

.about-row .val {
  color: var(--text);
  font-weight: 500;
  text-align: right;
}

.status-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #22c55e;
  margin-right: 6px;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.skill-card {
  border-radius: var(--radius);
  padding: 1.5rem;
}

.skill-card-title {
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 1.25rem;
  color: var(--text);
}

.skill-tags,
.proj-tags,
.edu-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-tag,
.proj-tag,
.edu-pill {
  border: 1px solid var(--border);
  border-radius: 50px;
  color: var(--muted);
  background: var(--card2);
}

.skill-tag {
  font-size: 0.75rem;
  padding: 0.3rem 0.8rem;
  transition: color 0.2s, border-color 0.2s;
}

.skill-tag:hover {
  color: var(--cyan);
  border-color: rgba(0, 229, 255, 0.3);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.proj-card {
  border-radius: var(--radius);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  transition: border-color 0.25s, transform 0.25s;
}

.proj-card:hover,
.ach-card:hover {
  border-color: #333;
}

.proj-card:hover {
  transform: translateY(-3px);
}

.proj-num {
  font-size: 0.68rem;
  color: var(--muted2);
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
}

.proj-name {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.proj-desc {
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.75;
  margin-bottom: 1.25rem;
  flex: 1;
}

.proj-tag {
  font-size: 0.68rem;
  padding: 0.22rem 0.65rem;
}

.proj-link {
  font-size: 0.78rem;
  color: var(--cyan);
  text-decoration: none;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: auto;
  transition: gap 0.2s;
}

.proj-link:hover {
  gap: 0.65rem;
}

.edu-card {
  border-radius: var(--radius);
  padding: 2.5rem;
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  gap: 2.5rem;
  align-items: flex-start;
}

.edu-year-badge {
  background: var(--card2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.9rem;
  font-size: 0.72rem;
  color: var(--cyan);
  white-space: nowrap;
  font-weight: 600;
  margin-top: 0.25rem;
}

.edu-degree {
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 0.4rem;
  letter-spacing: -0.01em;
}

.edu-school {
  font-size: 0.85rem;
  color: var(--cyan);
  font-weight: 500;
  margin-bottom: 0.75rem;
}

.edu-detail {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.75;
  margin-bottom: 1rem;
}

.edu-pill {
  font-size: 0.72rem;
  padding: 0.28rem 0.8rem;
}

.ach-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.1rem;
}

.ach-card {
  border-radius: var(--radius);
  padding: 1.4rem;
  transition: border-color 0.2s, transform 0.2s;
}

.ach-card:hover {
  transform: translateY(-2px);
}

.ach-icon {
  font-size: 1.3rem;
  margin-bottom: 0.65rem;
}

.ach-issuer {
  font-size: 0.65rem;
  color: var(--cyan);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.ach-title {
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1.35;
  margin-bottom: 0.35rem;
  color: var(--text);
}

.ach-date {
  font-size: 0.7rem;
  color: var(--muted);
}

.contact-copy {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.8;
  margin-bottom: 1.75rem;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.contact-link-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  text-decoration: none;
  color: var(--text);
  font-size: 0.82rem;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-sm);
  transition: border-color 0.2s;
}

.contact-link-item:hover {
  border-color: #444;
}

.contact-link-item .icon {
  width: 32px;
  height: 32px;
  background: var(--card2);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.contact-form-card {
  border-radius: var(--radius);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.contact-form-card input,
.contact-form-card textarea {
  background: var(--card2);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: 'Inter', sans-serif;
  font-size: 0.82rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  outline: none;
  resize: none;
  width: 100%;
  transition: border-color 0.2s;
}

.contact-form-card input:focus,
.contact-form-card textarea:focus {
  border-color: #444;
}

.contact-form-card input::placeholder,
.contact-form-card textarea::placeholder {
  color: var(--muted2);
}

.contact-submit {
  justify-content: center;
}

footer {
  border-top: 1px solid var(--border);
  padding: 2rem;
  text-align: center;
  font-size: 0.78rem;
  color: var(--muted);
}

footer strong {
  color: var(--text);
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

@media (max-width: 900px) {
  .nav-links {
    display: none;
  }

  .hero-inner,
  .about-grid,
  .projects-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .hero-badge-col {
    flex-direction: row;
    justify-content: flex-start;
  }

  .skills-grid,
  .ach-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .edu-card {
    flex-direction: column;
    gap: 1rem;
  }
}