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

/* ── Theme Variables ────────────────────────── */

:root {
  /* Default: Gruvbox Dark */
  --bg:           #282828;
  --surface:      #3c3836;
  --border:       #504945;
  --text:         #ebdbb2;
  --muted:        #a89984;
  --teal:         #83a598;
  --orange:       #fe8019;
  --connect-bg:   #32302f;
  --connect-bdr:  #504945;
  --header-bg:    rgba(40, 40, 40, 0.9);
  --speed-line:   rgba(254, 128, 25, 0.05);
  --watermark:    rgba(131, 165, 152, 0.07);
  --avatar-shadow: rgba(131, 165, 152, 0.12);
  --card-glow-1:  rgba(254, 128, 25, 0.22);
  --card-glow-2:  rgba(254, 128, 25, 0.14);
  --footer-bg:    #665c54;
  --footer-text:  #d5c4a1;
}

[data-theme="light"] {
  --bg:           #fbf1c7;
  --surface:      #f9f5d7;
  --border:       #d5c4a1;
  --text:         #3c3836;
  --muted:        #7c6f64;
  --teal:         #458588;
  --orange:       #d65d0e;
  --connect-bg:   #ebdbb2;
  --connect-bdr:  #d5c4a1;
  --header-bg:    rgba(251, 241, 199, 0.88);
  --speed-line:   rgba(69, 133, 136, 0.055);
  --watermark:    rgba(214, 93, 14, 0.07);
  --avatar-shadow: rgba(69, 133, 136, 0.12);
  --card-glow-1:  rgba(214, 93, 14, 0.2);
  --card-glow-2:  rgba(214, 93, 14, 0.12);
  --footer-bg:    #ebdbb2;
  --footer-text:  #7c6f64;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Animations ──────────────────────────────── */

@keyframes fade-up {
  from { opacity: 0; transform: translateY(22px); }
  to   { opacity: 1; transform: translateY(0);    }
}

.eyebrow     { animation: fade-up 0.5s  ease both; animation-delay: 0.05s; }
.hero-name   { animation: fade-up 0.55s ease both; animation-delay: 0.15s; }
.hero-bio    { animation: fade-up 0.55s ease both; animation-delay: 0.28s; }
.hero-avatar { animation: fade-up 0.55s ease both; animation-delay: 0.35s; }

/* ── Header ─────────────────────────────────── */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 2.5rem;
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.logo {
  display: flex;
  align-items: stretch;
  text-decoration: none;
  transition: opacity 0.15s;
  flex-shrink: 0;
}

.logo:hover { opacity: 0.8; }

/* Stacking: earlier segments sit on top so their arrows cover the next pip */
.logo > :nth-child(1) { z-index: 10; }
.logo > :nth-child(2) { z-index:  9; }
.logo > :nth-child(3) { z-index:  8; }
.logo > :nth-child(4) { z-index:  7; }
.logo > :nth-child(5) { z-index:  6; }
.logo > :nth-child(6) { z-index:  5; }
.logo > :nth-child(7) { z-index:  4; }
.logo > :nth-child(8) { z-index:  3; }

.logo-seg-1,
.logo-seg-2 {
  display: flex;
  align-items: center;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
  position: relative;
}

.logo-seg-1 {
  background: #3c3836;
  color: #ebdbb2;
  padding: 0.22rem 0.65rem;
  border-radius: 3px 0 0 3px;
}

.logo-seg-1::after {
  content: '';
  position: absolute;
  right: -9px;
  top: 50%;
  transform: translateY(-50%);
  width: 0; height: 0;
  border-top: 11px solid transparent;
  border-bottom: 11px solid transparent;
  border-left: 9px solid #3c3836;
}

/* Powerline rainbow pips */
.logo-pip {
  width: 9px;
  position: relative;
}

.logo-pip::after {
  content: '';
  position: absolute;
  right: -7px;
  top: 50%;
  transform: translateY(-50%);
  width: 0; height: 0;
  border-top: 11px solid transparent;
  border-bottom: 11px solid transparent;
  border-left-width: 7px;
  border-left-style: solid;
}

.pip-1 { background: #b8bb26; } .pip-1::after { border-left-color: #b8bb26; }
.pip-2 { background: #98971a; } .pip-2::after { border-left-color: #98971a; }
.pip-3 { background: #fe8019; } .pip-3::after { border-left-color: #fe8019; }
.pip-4 { background: #d65d0e; } .pip-4::after { border-left-color: #d65d0e; }
.pip-5 { background: #a89984; } .pip-5::after { border-left-color: #a89984; }
.pip-6 { background: #928374; } .pip-6::after { border-left-color: #928374; }

.logo-seg-2 {
  background: #504945;
  color: #ebdbb2;
  padding: 0.22rem 0.65rem 0.22rem 0.85rem;
}

.logo-seg-2::after {
  content: '';
  position: absolute;
  right: -9px;
  top: 50%;
  transform: translateY(-50%);
  width: 0; height: 0;
  border-top: 11px solid transparent;
  border-bottom: 11px solid transparent;
  border-left: 9px solid #504945;
}

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

.logo-cursor { animation: blink 1.2s step-end infinite; }

.nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.15s;
}

.nav-link:hover { color: var(--teal); }

.lang-sep {
  color: var(--border);
  user-select: none;
  font-size: 0.875rem;
}

.lang-switch {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--muted);
  transition: color 0.15s;
}

a.lang-switch:hover { color: var(--text); }

.lang-switch.lang-active {
  color: var(--orange);
  cursor: default;
}

/* ── Theme Toggle ────────────────────────────── */

.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.2rem;
  color: var(--muted);
  transition: color 0.15s;
  display: flex;
  align-items: center;
}

.theme-toggle:hover { color: var(--orange); }

.theme-toggle svg {
  width: 16px;
  height: 16px;
}

/* Show moon in dark mode, sun in light mode */
.icon-sun  { display: none; }
.icon-moon { display: block; }

[data-theme="light"] .icon-sun  { display: block; }
[data-theme="light"] .icon-moon { display: none; }

/* ── Hero ────────────────────────────────────── */

.hero {
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 2rem;
  max-width: 900px;
  margin: 0 auto;
  padding: 7rem 2.5rem 6rem;
  width: 100%;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-conic-gradient(
    from 0deg at 108% -8%,
    transparent 0deg 2deg,
    var(--speed-line) 2deg 2.5deg
  );
  pointer-events: none;
  z-index: 0;
}

.watermark {
  position: absolute;
  right: -0.05em;
  top: 50%;
  transform: translateY(-50%);
  font-size: clamp(9rem, 22vw, 18rem);
  font-weight: 700;
  line-height: 1;
  color: var(--watermark);
  pointer-events: none;
  user-select: none;
  z-index: 0;
}

.hero-inner {
  flex: 1;
  position: relative;
  z-index: 1;
}

.eyebrow {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--orange);
  margin-bottom: 1.25rem;
}

.hero-name {
  font-size: clamp(3.5rem, 9vw, 6.5rem);
  font-weight: 700;
  line-height: 1.0;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 2rem;
}

.hero-bio {
  font-size: 1.05rem;
  font-weight: 300;
  font-style: italic;
  color: var(--muted);
  max-width: 42ch;
  line-height: 1.75;
}

.hero-avatar {
  flex-shrink: 0;
  position: relative;
  z-index: 1;
  width: 130px;
  height: 130px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center 15%;
  border: 3px solid var(--teal);
  margin-top: 1rem;
  box-shadow: 0 0 0 6px var(--avatar-shadow);
}

/* ── Connect ─────────────────────────────────── */

.connect {
  background-color: var(--connect-bg);
  border-top: 1px solid var(--connect-bdr);
}

.connect-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 4rem 2.5rem 5rem;
  width: 100%;
}

.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 1.5rem;
}

.link-row {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.link-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.1rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--teal);
  border-radius: 10px;
  text-decoration: none;
  color: var(--text);
  transition: border-left-color 0.2s, box-shadow 0.2s, transform 0.15s;
}

.link-card:hover {
  border-left-color: var(--orange);
  box-shadow: 0 4px 28px var(--card-glow-1), 0 1px 6px var(--card-glow-2);
  transform: translateY(-2px);
}

.link-icon {
  width: 20px;
  height: 20px;
  fill: currentColor;
  flex-shrink: 0;
  color: var(--teal);
  transition: color 0.2s;
}

.link-card:hover .link-icon { color: var(--orange); }

.link-title {
  font-size: 0.925rem;
  font-weight: 500;
  line-height: 1.2;
}

.link-sub {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 0.1rem;
}

.arrow {
  width: 18px;
  height: 18px;
  color: var(--muted);
  margin-left: auto;
  flex-shrink: 0;
  transition: color 0.2s, transform 0.15s;
}

.link-card:hover .arrow {
  color: var(--orange);
  transform: translate(2px, -2px);
}

/* ── Certifications ─────────────────────────── */

.certs {
  border-top: 1px solid var(--connect-bdr);
}

.certs-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 4rem 2.5rem 5rem;
  width: 100%;
}

.cert-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
}

.cert-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 1.25rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  text-decoration: none;
  color: var(--text);
  width: 140px;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.15s;
}

a.cert-card:hover {
  border-color: var(--teal);
  box-shadow: 0 4px 28px var(--card-glow-1), 0 1px 6px var(--card-glow-2);
  transform: translateY(-2px);
}

.cert-badge {
  width: 80px;
  height: 80px;
  object-fit: contain;
}

.cert-name {
  font-size: 0.8rem;
  font-weight: 600;
  text-align: center;
  line-height: 1.3;
}

.cert-meta {
  font-size: 0.7rem;
  color: var(--muted);
  text-align: center;
}

.cert-expired {
  opacity: 0.5;
}

.cert-expired .cert-meta {
  color: var(--orange);
}

.cert-soon {
  opacity: 0.35;
  border-style: dashed;
  cursor: default;
}

/* ── Footer ──────────────────────────────────── */

.site-footer {
  background-color: var(--footer-bg);
  border-top: 1px solid var(--connect-bdr);
  padding: 1.25rem 2.5rem;
  font-size: 0.8rem;
  color: var(--footer-text);
  text-align: center;
}

/* ── Responsive ──────────────────────────────── */

@media (max-width: 600px) {
  .site-header {
    padding: 1rem 1.25rem;
  }

  .nav { gap: 0.75rem; }

  .nav-link { display: none; }

  .hero {
    flex-direction: column-reverse;
    padding: 4rem 1.25rem 3rem;
    gap: 1.5rem;
  }

  .hero-avatar {
    width: 90px;
    height: 90px;
    margin-top: 0;
  }

  .connect-inner { padding: 3rem 1.25rem 4rem; }
  .certs-inner   { padding: 3rem 1.25rem 4rem; }

  .cert-grid {
    justify-content: center;
  }

  .site-footer   { padding: 1rem 1.25rem; }
}