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

:root {
  --navy:      #0f2340;
  --blue:      #1a4a8a;
  --accent:    #2a7fff;
  --orange:    #e05c1a;
  --text:      #1a1a2e;
  --muted:     #5a6a7e;
  --bg:        #f0f4f9;
  --white:     #ffffff;
  --border:    #d0daea;

  /* tag colors */
  --cloud-bg:  #dbeafe; --cloud-fg: #1e40af;
  --lang-bg:   #dcfce7; --lang-fg:  #166534;
  --sec-bg:    #fef3c7; --sec-fg:   #92400e;
  --net-bg:    #f3e8ff; --net-fg:   #6b21a8;
  --db-bg:     #ffe4e6; --db-fg:    #9f1239;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'IBM Plex Sans', sans-serif;
  background: var(--bg);
  color: var(--text);
  padding-top: 64px;
  font-size: 15px;
  line-height: 1.6;
}

/* ── Nav ──────────────────────────────────────────────────── */
#topnav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 56px;
  background: var(--navy);
  z-index: 100;
  transition: box-shadow 0.3s;
}
#topnav.scrolled {
  box-shadow: 0 2px 16px rgba(0,0,0,0.25);
}
.nav-inner {
  max-width: 900px;
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
}
.nav-name {
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 600;
  color: var(--accent);
  font-size: 0.9rem;
  letter-spacing: 0.05em;
}
.nav-links { display: flex; gap: 24px; }
.nav-links a {
  color: #94a3c0;
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: color 0.2s;
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--white);
  border-bottom-color: var(--accent);
}

/* ── Container ────────────────────────────────────────────── */
.container {
  max-width: 900px;
  margin: 0 auto;
  background: var(--white);
  padding: 56px 64px;
  border-radius: 0 0 12px 12px;
  box-shadow: 0 4px 32px rgba(0,0,0,0.07);
  min-height: calc(100vh - 64px);
}

/* ── Fade-in ──────────────────────────────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Header ───────────────────────────────────────────────── */
header {
  text-align: center;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 40px;
}
.header-tag {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 0.15em;
  margin-bottom: 12px;
  text-transform: uppercase;
}
h1 {
  font-size: 2.6rem;
  font-weight: 600;
  color: var(--navy);
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 8px;
}
.tagline {
  color: var(--muted);
  font-size: 1rem;
  font-weight: 300;
  margin-bottom: 16px;
}
.contact {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--muted);
}
.contact a { color: var(--blue); text-decoration: none; }
.contact a:hover { text-decoration: underline; }
.sep { color: var(--border); }

/* Copy button */
.copy-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.75rem;
  padding: 2px 10px;
  border-radius: 20px;
  cursor: pointer;
  font-family: 'IBM Plex Sans', sans-serif;
  transition: all 0.2s;
}
.copy-btn:hover {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}
.copy-confirm {
  font-size: 0.78rem;
  color: #166534;
  background: #dcfce7;
  padding: 2px 10px;
  border-radius: 20px;
  display: inline-block;
  margin-top: 6px;
  opacity: 0;
  transition: opacity 0.3s;
  height: 22px;
}
.copy-confirm.show { opacity: 1; }

/* ── Section headings ─────────────────────────────────────── */
section { margin-bottom: 40px; }

h2 {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}
h2::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}
.section-num {
  color: var(--accent);
  font-weight: 600;
}

p { color: var(--text); font-size: 0.93rem; line-height: 1.7; }

ul { padding-left: 18px; }
li { margin-bottom: 7px; font-size: 0.9rem; line-height: 1.65; color: #2a3444; }

code {
  background: #f0f4f8;
  padding: 1px 6px;
  border-radius: 4px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.82rem;
  color: var(--orange);
}

/* ── Certs ────────────────────────────────────────────────── */
.cert-list { list-style: none; padding: 0; }
.cert-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.92rem;
}
.cert-list li:last-child { border-bottom: none; }
.cert-badge {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.8rem;
  font-weight: 600;
  color: #166534;
  background: #dcfce7;
  padding: 2px 8px;
  border-radius: 4px;
  min-width: 28px;
  text-align: center;
}
.cert-badge.in-progress {
  color: #92400e;
  background: #fef3c7;
}

/* ── Education ────────────────────────────────────────────── */
.edu-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.92rem;
}
.edu-item:last-child { border-bottom: none; }

/* ── Skill tags ───────────────────────────────────────────── */
.skill-group {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 14px;
}
.skill-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  min-width: 80px;
  padding-top: 5px;
}
.skill-tags { display: flex; flex-wrap: wrap; gap: 7px; }

.tag {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 3px 11px;
  border-radius: 20px;
  letter-spacing: 0.02em;
  transition: transform 0.15s, box-shadow 0.15s;
  cursor: default;
}
.tag:hover {
  transform: translateY(-2px);
  box-shadow: 0 3px 8px rgba(0,0,0,0.12);
}
.tag-cloud { background: var(--cloud-bg); color: var(--cloud-fg); }
.tag-lang  { background: var(--lang-bg);  color: var(--lang-fg);  }
.tag-sec   { background: var(--sec-bg);   color: var(--sec-fg);   }
.tag-net   { background: var(--net-bg);   color: var(--net-fg);   }
.tag-db    { background: var(--db-bg);    color: var(--db-fg);    }

/* ── Experience ───────────────────────────────────────────── */
.job { padding: 16px 0; }
.job-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
  gap: 12px;
}
.job-title {
  font-weight: 600;
  font-size: 1rem;
  color: var(--navy);
}
.job-company {
  font-size: 0.87rem;
  color: var(--muted);
  margin-top: 2px;
}

/* ── Projects ─────────────────────────────────────────────── */
.project {
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
}
.project:last-child { border-bottom: none; }
.project-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.project-title {
  font-weight: 600;
  font-size: 0.97rem;
  color: var(--navy);
}
.project-tags { display: flex; flex-wrap: wrap; gap: 5px; }

/* ── Date tag ─────────────────────────────────────────────── */
.date-tag {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.75rem;
  color: var(--muted);
  background: var(--bg);
  padding: 2px 8px;
  border-radius: 4px;
  white-space: nowrap;
}

/* ── Footer ───────────────────────────────────────────────── */
.footer-line {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.75rem;
  color: var(--muted);
}

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 680px) {
  .container { padding: 32px 24px; }
  h1 { font-size: 1.9rem; }
  .nav-links { gap: 14px; }
  .skill-group { flex-direction: column; gap: 8px; }
  .skill-label { min-width: unset; }
  .job-header, .project-header { flex-direction: column; }
  .footer-line { flex-direction: column; gap: 6px; text-align: center; }
}