/* ── Reset & Base ──────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

:root {
  --bg:       #0a0e17;
  --surface:  #111827;
  --surface2: #162033;
  --border:   #1e2d45;
  --text:     #e2e8f0;
  --muted:    #64748b;
  --accent:   #00d4ff;
  --accent2:  #7c3aed;
  --font:     'Inter', sans-serif;
  --mono:     'JetBrains Mono', monospace;
  --radius:   12px;
  --trans:    0.3s ease;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.7;
  overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }

.accent { color: var(--accent); }

.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section-label {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: lowercase;
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 3rem;
  letter-spacing: -0.02em;
}

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

/* ── Selection ──────────────────────────────────────── */
::selection { background: var(--accent); color: var(--bg); }

/* ── Navigation ─────────────────────────────────────── */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  transition: background var(--trans), box-shadow var(--trans), backdrop-filter var(--trans);
}

#navbar.scrolled {
  background: rgba(10, 14, 23, 0.9);
  backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--border);
}

.nav-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--mono);
  font-size: 1.25rem;
  font-weight: 500;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  gap: 2.5rem;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--muted);
  transition: color var(--trans);
  letter-spacing: 0.02em;
}

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

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--trans), opacity var(--trans);
}

.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Hero ───────────────────────────────────────────── */
#hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

#hero-canvas {
  position: absolute;
  inset: 0;
  z-index: 0;
  display: block;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 0 1.5rem;
}

.hero-badge {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--accent);
  border: 1px solid rgba(0, 212, 255, 0.25);
  padding: 0.35rem 1rem;
  border-radius: 999px;
  margin-bottom: 1.5rem;
  letter-spacing: 0.08em;
  background: rgba(0, 212, 255, 0.06);
}

.hero-name {
  font-size: clamp(3.5rem, 10vw, 7rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  margin-bottom: 0.75rem;
  background: linear-gradient(135deg, #fff 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-title {
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  font-weight: 300;
  color: var(--muted);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}

.hero-typed {
  font-family: var(--mono);
  font-size: clamp(0.9rem, 2vw, 1.05rem);
  color: var(--muted);
  margin-bottom: 2.5rem;
  min-height: 1.6em;
}

#typed-word {
  color: var(--accent);
}

.typed-cursor {
  color: var(--accent);
  animation: blink 1s step-end infinite;
}

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

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 2rem;
  background: var(--accent);
  color: var(--bg);
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: var(--radius);
  transition: opacity var(--trans), transform var(--trans), box-shadow var(--trans);
  box-shadow: 0 0 24px rgba(0, 212, 255, 0.3);
}

.btn-primary:hover {
  opacity: 0.88;
  transform: translateY(-2px);
  box-shadow: 0 0 40px rgba(0, 212, 255, 0.5);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  padding: 0.8rem 2rem;
  border: 1px solid var(--border);
  color: var(--text);
  font-weight: 500;
  font-size: 0.9rem;
  border-radius: var(--radius);
  transition: border-color var(--trans), background var(--trans), transform var(--trans);
}

.btn-outline:hover {
  border-color: var(--accent);
  background: rgba(0, 212, 255, 0.06);
  transform: translateY(-2px);
}

.hero-scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.scroll-label {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: var(--muted);
  text-transform: uppercase;
}

.scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--muted), transparent);
  animation: scrollDown 1.8s ease-in-out infinite;
}

@keyframes scrollDown {
  0%   { transform: scaleY(0); transform-origin: top; opacity: 1; }
  50%  { transform: scaleY(1); transform-origin: top; opacity: 1; }
  51%  { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; opacity: 0; }
}

/* ── About ──────────────────────────────────────────── */
#about {
  padding: 7rem 0;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 5rem;
  align-items: center;
}

.about-desc {
  color: var(--muted);
  font-size: 1.0625rem;
  margin-bottom: 1.25rem;
  line-height: 1.8;
}

.about-stats {
  display: flex;
  gap: 2.5rem;
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.about-stat {
  display: flex;
  flex-direction: column;
}

.stat-num {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  letter-spacing: -0.03em;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 0.25rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.about-photo-wrap {
  position: relative;
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.about-photo-frame {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(0, 212, 255, 0.2);
  box-shadow:
    0 0 0 1px rgba(0, 212, 255, 0.08),
    0 0 40px rgba(0, 212, 255, 0.12),
    0 24px 64px rgba(0, 0, 0, 0.6);
  width: 100%;
  max-width: 380px;
}

.about-photo {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: brightness(0.92) contrast(1.05);
}

.about-photo-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to bottom, transparent 60%, rgba(0, 212, 255, 0.04) 100%),
    linear-gradient(135deg, rgba(0, 212, 255, 0.04) 0%, transparent 50%);
  pointer-events: none;
}

.sphere-float {
  position: absolute;
  bottom: -24px;
  right: -24px;
  width: 130px !important;
  height: 130px !important;
  z-index: 2;
  pointer-events: none;
}

#sphere-canvas {
  display: block;
}

/* ── Skills ─────────────────────────────────────────── */
#skills {
  padding: 7rem 0;
  background: var(--surface);
}

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

.skills-group {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.skills-group-title {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.25rem;
}

.skill-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.skill-card:last-child { margin-bottom: 0; }

.skill-icon {
  width: 44px;
  height: 44px;
  min-width: 44px;
  border-radius: 8px;
  background: var(--c, var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 0.6rem;
  font-weight: 500;
  color: #fff;
  letter-spacing: 0.04em;
}

.skill-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.skill-name {
  font-size: 0.875rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.skill-bar {
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}

.skill-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--accent2), var(--accent));
  border-radius: 2px;
  transition: width 1s cubic-bezier(0.4, 0, 0.2, 1);
}

.skill-pct {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--muted);
  text-align: right;
}

/* ── Timeline ───────────────────────────────────────── */
#experience {
  padding: 7rem 0;
}

.timeline {
  position: relative;
  padding: 1rem 0;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0; bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--border) 10%, var(--border) 90%, transparent);
}

.tl-item {
  position: relative;
  width: 50%;
  padding: 0 3rem 3rem;
}

.tl-item.tl-right {
  margin-left: 50%;
}

.tl-dot {
  position: absolute;
  top: 6px;
  width: 14px;
  height: 14px;
  background: var(--accent);
  border: 3px solid var(--bg);
  border-radius: 50%;
  box-shadow: 0 0 12px rgba(0, 212, 255, 0.5);
}

.tl-left .tl-dot  { right: -7px; }
.tl-right .tl-dot { left: -7px; }

.tl-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 1.75rem;
  transition: border-color var(--trans), box-shadow var(--trans);
}

.tl-card:hover {
  border-color: rgba(0, 212, 255, 0.3);
  box-shadow: 0 0 24px rgba(0, 212, 255, 0.08);
}

.tl-date {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--accent);
  letter-spacing: 0.08em;
}

.tl-role {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-top: 0.4rem;
}

.tl-company {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 0.2rem;
  margin-bottom: 0.8rem;
}

.tl-desc {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 1rem;
}

.tl-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tl-tags span {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--accent);
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid rgba(0, 212, 255, 0.2);
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  letter-spacing: 0.04em;
}

/* ── Contact ────────────────────────────────────────── */
#contact {
  padding: 7rem 0;
  background: var(--surface);
}

.contact-sub {
  font-size: 1.0625rem;
  color: var(--muted);
  margin-top: -2rem;
  margin-bottom: 3rem;
}

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

.contact-card {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 1.75rem;
  transition: border-color var(--trans), transform var(--trans), box-shadow var(--trans);
}

.contact-card:hover {
  border-color: rgba(0, 212, 255, 0.4);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0, 212, 255, 0.1);
}

.contact-icon {
  width: 48px;
  height: 48px;
  min-width: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid rgba(0, 212, 255, 0.15);
  border-radius: 10px;
  color: var(--accent);
}

.contact-icon svg {
  width: 22px;
  height: 22px;
}

.contact-details {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.contact-label {
  font-size: 0.75rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.2rem;
}

.contact-value {
  font-size: 0.9rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── Footer ─────────────────────────────────────────── */
footer {
  padding: 2rem 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-text {
  font-size: 0.875rem;
  color: var(--muted);
}

.footer-mono {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--border);
}

/* ── Scroll-reveal ──────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-tl {
  opacity: 0;
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.tl-left.reveal-tl  { transform: translateX(-24px); }
.tl-right.reveal-tl { transform: translateX(24px); }

.reveal-tl.visible {
  opacity: 1;
  transform: translateX(0);
}

/* ── Responsive ─────────────────────────────────────── */
@media (max-width: 1024px) {
  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: fixed;
    top: 64px; left: 0; right: 0;
    background: rgba(10, 14, 23, 0.97);
    backdrop-filter: blur(16px);
    flex-direction: column;
    align-items: center;
    gap: 0;
    border-top: 1px solid var(--border);
    padding: 1rem 0 2rem;
  }

  .nav-links.open { display: flex; }
  .nav-links a {
    padding: 0.9rem 2rem;
    font-size: 1rem;
  }

  .nav-hamburger { display: flex; }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .about-canvas-wrap { order: -1; }
  #sphere-canvas { width: 260px; height: 260px; }

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

  .timeline::before { left: 1.25rem; }

  .tl-item {
    width: 100%;
    padding-left: 3.5rem;
    padding-right: 0;
    margin-left: 0 !important;
  }

  .tl-dot { left: 18px !important; right: auto !important; }
  .tl-left.reveal-tl,
  .tl-right.reveal-tl { transform: translateX(0); opacity: 0; }

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

  .footer-inner { flex-direction: column; gap: 0.5rem; text-align: center; }

  .about-stats { gap: 1.5rem; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; align-items: center; }
  .btn-primary, .btn-outline { width: 100%; justify-content: center; max-width: 280px; }
  .about-stats { flex-wrap: wrap; }
}