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

:root {
  --bg:        #0a0a0a;
  --bg-2:      #111111;
  --bg-3:      #181818;
  --border:    #222222;
  --border-hi: #333333;
  --text:      #e8e8e8;
  --dim:       #555555;
  --dim-2:     #3a3a3a;
  --accent:    #00d4ff;
  --accent-lo: rgba(0, 212, 255, 0.08);
  --accent-md: rgba(0, 212, 255, 0.15);
  --green:     #39d353;
  --mono:      'JetBrains Mono', monospace;
  --sans:      'Syne', sans-serif;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.7;
  overflow-x: hidden;
}

/* ─── UTILITIES ─────────────────────────────────── */
.prompt   { color: var(--accent); user-select: none; }
.dim      { color: var(--dim); }
.accent   { color: var(--accent); }

.cursor-blink {
  animation: blink 1.1s step-end infinite;
  color: var(--accent);
}
@keyframes blink { 50% { opacity: 0; } }

/* ─── NAV ────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 999;
  background: rgba(10,10,10,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-family: var(--mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}
.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
}
.nl {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--dim);
  text-decoration: none;
  transition: color 0.2s;
  letter-spacing: 0.05em;
}
.nl::before {
  content: attr(data-num) ' ';
  color: var(--accent);
  opacity: 0.5;
}
.nl:hover, .nl.active { color: var(--text); }

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.burger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--text);
  transition: all 0.3s;
}

.mobile-menu {
  display: none;
  flex-direction: column;
  padding: 1rem 2rem;
  border-top: 1px solid var(--border);
  gap: 1rem;
}
.mobile-menu.open { display: flex; }
.mm-link {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--dim);
  text-decoration: none;
  transition: color 0.2s;
}
.mm-link:hover { color: var(--accent); }

/* ─── SECTIONS ───────────────────────────────────── */
.section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 7rem 2rem 4rem;
}
.section-header {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: 4rem;
}
.sec-num {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--accent);
  opacity: 0.6;
}
.sec-title {
  font-family: var(--sans);
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.03em;
  line-height: 1;
}
.sec-line {
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ─── HOME ───────────────────────────────────────── */
.s-home { padding-top: 8rem; }

.sys-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0 2.5rem;
  font-size: 0.72rem;
  color: var(--dim);
  margin-bottom: 4rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}
.sys-item { display: flex; gap: 0.5rem; align-items: center; }
.sys-item .dim { color: var(--dim-2); }
.blink-dot { color: var(--green); }
.dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--green);
  animation: pulse-dot 2s ease infinite;
}
@keyframes pulse-dot {
  0%,100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* hero grid */
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
  margin-bottom: 5rem;
}
.hero-label {
  font-size: 0.78rem;
  color: var(--dim);
  margin-bottom: 1.5rem;
  letter-spacing: 0.04em;
}
.hero-name {
  font-family: var(--sans);
  font-size: clamp(3rem, 5.5vw, 5.5rem);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.04em;
  margin-bottom: 1.5rem;
}
.name-line { display: block; }
.accent-line { color: var(--accent); }

.hero-title {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--text);
  margin-bottom: 1.5rem;
  line-height: 1.6;
}
.hero-bio {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--dim);
  max-width: 480px;
  line-height: 1.8;
  margin-bottom: 2.5rem;
}
.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}
.cta-primary {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--bg);
  background: var(--accent);
  text-decoration: none;
  padding: 0.7rem 1.5rem;
  border-radius: 2px;
  transition: opacity 0.2s;
}
.cta-primary:hover { opacity: 0.85; }
.cta-ghost {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--dim);
  text-decoration: none;
  padding: 0.7rem 1.2rem;
  border: 1px solid var(--border);
  border-radius: 2px;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.cta-ghost:hover { color: var(--accent); border-color: var(--accent); }

/* photo */
.hero-right { display: flex; flex-direction: column; gap: 1.5rem; }
.photo-frame {
  position: relative;
  width: 100%;
  max-width: 320px;
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
}
.photo-tag {
  position: absolute;
  top: 0.8rem; left: 0.8rem;
  font-size: 0.68rem;
  color: var(--dim);
  background: rgba(10,10,10,0.8);
  padding: 0.2rem 0.5rem;
  border-radius: 2px;
  z-index: 2;
}
.hero-photo {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
  display: block;
  filter: grayscale(15%);
  transition: filter 0.4s;
}
.hero-photo:hover { filter: grayscale(0%); }
.photo-overlay-line {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 3px;
  background: var(--accent);
}

/* stack terminal */
.stack-terminal {
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
}
.term-header {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 0.8rem;
  background: var(--bg-3);
  border-bottom: 1px solid var(--border);
}
.term-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
}
.term-dot.r { background: #ff5f57; }
.term-dot.y { background: #ffbd2e; }
.term-dot.g { background: #28c840; }
.term-title {
  font-size: 0.7rem;
  color: var(--dim);
  margin-left: auto;
}
.term-body {
  padding: 1rem;
  background: var(--bg-2);
}
.term-line {
  font-size: 0.75rem;
  color: var(--dim);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.mt-sm { margin-top: 0.5rem; }

.stack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(72px, 1fr));
  gap: 0.8rem;
  margin-top: 0.8rem;
}
.stack-item {
  display: flex;
  min-height: 80px;
  justify-content: center;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  padding: 0.7rem 0.3rem;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: var(--bg-3);
  transition: border-color 0.2s, background 0.2s;
  cursor: default;
}
.stack-item:hover {
  border-color: var(--accent);
  background: var(--accent-lo);
}
.stack-item img {
  width: 28px;
  height: 28px;
  object-fit: contain;
}
.stack-item span {
  font-size: 0.6rem;
  color: var(--dim);
  text-align: center;
  white-space: normal;
  word-break: normal;
  overflow-wrap: break-word;
}

/* principles */
.principles {
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}
.prin-label {
  font-size: 0.72rem;
  color: var(--dim);
  white-space: nowrap;
}
.prin-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.8rem;
  align-items: center;
}
.prin-item {
  font-size: 0.72rem;
  color: var(--dim);
  font-style: italic;
}
.prin-sep { color: var(--dim-2); }

/* ─── WORK ───────────────────────────────────────── */
.s-work { border-top: 1px solid var(--border); }

.work-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}
.col-label {
  font-size: 0.75rem;
  color: var(--dim);
  margin-bottom: 2rem;
  letter-spacing: 0.04em;
}

/* project cards */
.project-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  transition: border-color 0.2s;
}
.project-card:hover { border-color: var(--border-hi); }
.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}
.card-num {
  font-size: 0.68rem;
  color: var(--accent);
  opacity: 0.6;
}
.card-link {
  font-size: 0.75rem;
  color: var(--dim);
  text-decoration: none;
  transition: color 0.2s;
}
.card-link:hover { color: var(--accent); }
.card-img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-radius: 2px;
  margin-bottom: 1rem;
  border: 1px solid var(--border);
  filter: grayscale(20%);
  transition: filter 0.3s;
}
.project-card:hover .card-img { filter: grayscale(0%); }
.card-title {
  font-family: var(--sans);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.6rem;
  letter-spacing: -0.01em;
}
.card-desc {
  font-size: 0.78rem;
  color: var(--dim);
  line-height: 1.7;
  margin-bottom: 1rem;
}
.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1rem;
}
.card-repo {
  font-size: 0.75rem;
  color: var(--dim);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: color 0.2s;
  border-top: 1px solid var(--border);
  padding-top: 1rem;
  width: 100%;
}
.card-repo:hover { color: var(--accent); }

/* tags shared */
.tag {
  font-size: 0.65rem;
  color: var(--accent);
  background: var(--accent-lo);
  border: 1px solid rgba(0, 212, 255, 0.2);
  padding: 0.15rem 0.55rem;
  border-radius: 2px;
  letter-spacing: 0.03em;
}

/* experience */
.exp-item {
  margin-bottom: 2rem;
}
.exp-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.6rem;
}
.exp-date { font-size: 0.7rem; color: var(--dim); }
.exp-status {
  font-size: 0.62rem;
  padding: 0.1rem 0.5rem;
  border-radius: 10px;
  letter-spacing: 0.05em;
}
.exp-status.active {
  background: rgba(57, 211, 83, 0.12);
  color: var(--green);
  border: 1px solid rgba(57, 211, 83, 0.25);
}
.exp-role {
  font-family: var(--sans);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.2rem;
  letter-spacing: -0.01em;
}
.exp-company {
  font-size: 0.75rem;
  color: var(--accent);
  margin-bottom: 0.8rem;
  opacity: 0.8;
}
.exp-desc {
  font-size: 0.78rem;
  color: var(--dim);
  line-height: 1.7;
  margin-bottom: 0.8rem;
}
.exp-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.exp-divider {
  width: 100%;
  height: 1px;
  background: var(--border);
  margin: 1.5rem 0;
}

/* ─── CONTACT ─────────────────────────────────────── */
.s-contact { border-top: 1px solid var(--border); }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}
.contact-terminal {
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
  max-width: 420px;
}
.contact-link {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--dim);
  text-decoration: none;
  font-size: 0.78rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
  transition: all 0.2s;
}
.contact-link:hover { color: var(--accent); }
.contact-link i { width: 14px; text-align: center; }
.cl-label {
  color: var(--accent);
  opacity: 0.6;
  min-width: 70px;
}
.cl-value { color: var(--text); }
.blink-cursor { margin-top: 0.5rem; }

.contact-headline {
  font-family: var(--sans);
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 1rem;
}
.contact-sub { font-size: 0.78rem; }

/* ─── FOOTER ─────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  font-size: 0.7rem;
  color: var(--dim);
}

/* ─── SCROLL ANIMATIONS ──────────────────────────── */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── RESPONSIVE ─────────────────────────────────── */
@media (max-width: 900px) {
  .hero-grid     { grid-template-columns: 1fr; gap: 3rem; }
  .hero-right    { flex-direction: row; flex-wrap: wrap; gap: 1.5rem; }
  .photo-frame   { max-width: 200px; }
  .stack-terminal{ flex: 1; min-width: 260px; }
  .work-grid     { grid-template-columns: 1fr; gap: 3rem; }
  .contact-grid  { grid-template-columns: 1fr; gap: 3rem; }
}

@media (max-width: 620px) {
  .nav-links    { display: none; }
  .burger       { display: flex; }
  .sys-bar      { gap: 0.8rem 1.5rem; font-size: 0.68rem; }
  .sec-title    { font-size: 2rem; }
  .hero-name    { font-size: 2.8rem; }
  .stack-grid   { grid-template-columns: repeat(4, 1fr); }
  .footer       { flex-direction: column; gap: 0.5rem; text-align: center; }
  .photo-frame  { max-width: 180px; }
  .hero-right   { flex-direction: column; }
  .contact-headline { font-size: 1.6rem; }
}