/* ============================================================
   DESIGN TOKENS — "Fresh Ocean"
   ============================================================ */
:root {
  --primary: #0EA5E9;
  --primary-600: #0284C7;
  --primary-700: #0369A1;
  --fresh: #22D3EE;
  --fresh-soft: #A5F3FC;

  --bg: #F6FAFD;
  --surface: #FFFFFF;
  --surface-2: #EEF6FB;
  --border: #DCE7F0;
  --text: #0B1B2B;
  --text-muted: #4B6478;
  --text-faint: #7C93A5;

  --shadow-color: 205 60% 30%;
  --shadow-sm: 0 1px 2px hsl(var(--shadow-color) / 0.06);
  --shadow-md: 0 8px 24px hsl(var(--shadow-color) / 0.10);
  --shadow-lg: 0 20px 48px hsl(var(--shadow-color) / 0.16);

  --font-display: 'Space Grotesk', ui-sans-serif, sans-serif;
  --font-body: 'Inter', ui-sans-serif, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', monospace;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;

  --maxw: 1120px;
  color-scheme: light;
}

html[data-theme="dark"] {
  --bg: #08121C;
  --surface: #0E1C2C;
  --surface-2: #122436;
  --border: #1D3348;
  --text: #E8F2FA;
  --text-muted: #93ABC0;
  --text-faint: #5E7891;
  --shadow-color: 210 80% 3%;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background 0.25s ease, color 0.25s ease;
}

a { color: inherit; text-decoration: none; }
h1, h2, h3 { font-family: var(--font-display); margin: 0; letter-spacing: -0.01em; }
p { margin: 0; }
ul, dl, dd, dt { margin: 0; padding: 0; }

.icon-btn.mobile-only { display: none; }

/* subtle grain so flat blue fields don't look sterile */
.noise-overlay {
  position: fixed; inset: 0; pointer-events: none; z-index: 999;
  opacity: 0.025; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ============================================================
   TOPBAR
   ============================================================ */
.topbar {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.topbar-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 16px 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.brand {
  font-family: var(--font-display); font-weight: 600; font-size: 1.05rem;
  color: var(--text); white-space: nowrap; letter-spacing: -0.01em;
}

.main-nav { display: flex; gap: 28px; }
.main-nav a {
  font-family: var(--font-mono); font-size: 0.88rem; color: var(--text-muted);
  transition: color 0.15s ease;
}
.main-nav a:hover { color: var(--primary); }
.route-dim { color: var(--text-faint); }

.topbar-controls { display: flex; align-items: center; gap: 10px; }

.pill-toggle {
  font-family: var(--font-mono); font-size: 0.8rem; font-weight: 600;
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 999px; padding: 7px 12px; cursor: pointer; color: var(--text-muted);
  display: flex; align-items: center; gap: 4px;
}
.pill-toggle .lang-opt { padding: 2px 3px; border-radius: 6px; transition: all 0.15s ease; }
.pill-toggle .lang-opt[data-active="true"] { color: var(--primary-700); background: color-mix(in srgb, var(--primary) 16%, transparent); }
html[data-theme="dark"] .pill-toggle .lang-opt[data-active="true"] { color: var(--fresh-soft); }
.lang-sep { color: var(--text-faint); }

.icon-btn {
  width: 36px; height: 36px; display: grid; place-items: center;
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 999px; cursor: pointer; color: var(--text);
}
.icon-btn svg { width: 18px; height: 18px; }
.icon-moon { display: none; }
html[data-theme="dark"] .icon-sun { display: none; }
html[data-theme="dark"] .icon-moon { display: block; }

.mobile-nav {
  display: none; flex-direction: column; padding: 4px 24px 16px;
  border-top: 1px solid var(--border);
}
.mobile-nav a { font-family: var(--font-mono); padding: 10px 0; color: var(--text-muted); border-bottom: 1px solid var(--border); }
.mobile-nav.open { display: flex; }

/* ============================================================
   SHARED SECTION LAYOUT
   ============================================================ */
.section-inner, .hero-inner, .footer-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 0 24px;
}
.section { padding: 88px 0; }
.section-alt { background: var(--surface-2); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

.eyebrow {
  font-family: var(--font-mono); font-size: 0.82rem; font-weight: 600;
  color: var(--primary-700); margin: 0 0 14px; display: flex; align-items: center; gap: 10px;
}
html[data-theme="dark"] .eyebrow { color: var(--fresh-soft); }
.eyebrow-status {
  font-size: 0.72rem; color: var(--fresh); background: color-mix(in srgb, var(--fresh) 14%, transparent);
  padding: 2px 8px; border-radius: 999px; border: 1px solid color-mix(in srgb, var(--fresh) 35%, transparent);
}
.eyebrow-count { font-size: 0.72rem; color: var(--text-faint); }

.section-title { font-size: clamp(1.7rem, 3vw, 2.3rem); font-weight: 700; margin-bottom: 14px; }
.section-lede { color: var(--text-muted); max-width: 640px; margin-bottom: 40px; font-size: 1.02rem; }

/* ============================================================
   HERO + CONSOLE (signature element)
   ============================================================ */
.hero { padding: 64px 0 96px; }
.hero-inner {
  display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px; align-items: center;
}

.console {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg); overflow: hidden;
  animation: consoleIn 0.6s ease both;
}
@keyframes consoleIn { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: translateY(0); } }

.console-topbar {
  display: flex; align-items: center; gap: 7px; padding: 12px 16px;
  background: var(--surface-2); border-bottom: 1px solid var(--border);
}
.dot { width: 9px; height: 9px; border-radius: 50%; }
.dot-r { background: #F87171; } .dot-y { background: #FBBF24; } .dot-g { background: #34D399; }
.console-filename { margin-left: 8px; font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-faint); }

.console-body { padding: 22px 20px 24px; font-family: var(--font-mono); font-size: 0.86rem; }
.console-line { padding: 3px 0; white-space: pre-wrap; word-break: break-word; }
.method { color: #fff; background: var(--primary); border-radius: 5px; padding: 1px 7px; font-weight: 700; font-size: 0.78rem; }
.path { color: var(--text); font-weight: 600; }
.proto { color: var(--text-faint); }
.hdr-key { color: var(--text-faint); }
.console-divider { height: 1px; background: var(--border); margin: 12px 0; }

.resp-status { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 8px; }
.status-code { color: var(--fresh); font-weight: 700; }
html[data-theme="dark"] .status-code { color: var(--fresh); }
.pulse-wrap { display: flex; align-items: center; gap: 8px; color: var(--text-muted); font-size: 0.8rem; }
.pulse-dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--fresh);
  box-shadow: 0 0 0 0 color-mix(in srgb, var(--fresh) 60%, transparent);
  animation: pulse 2s ease-in-out infinite;
}
.pulse-dot-sm { width: 6px; height: 6px; }
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--fresh) 55%, transparent); }
  70% { box-shadow: 0 0 0 8px color-mix(in srgb, var(--fresh) 0%, transparent); }
  100% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--fresh) 0%, transparent); }
}

.resp-body { margin: 14px 0 0; padding: 14px 16px; background: var(--surface-2); border-radius: var(--radius-sm); border: 1px solid var(--border); white-space: pre-wrap; word-break: break-word; }
.tok-key { color: var(--primary-700); } html[data-theme="dark"] .tok-key { color: var(--fresh-soft); }
.tok-str { color: #C2410C; } html[data-theme="dark"] .tok-str { color: #FDBA74; }
.tok-brace { color: var(--text-faint); }

.hero-copy { display: flex; flex-direction: column; gap: 20px; }
.hero-title { font-size: clamp(1.9rem, 3.4vw, 2.7rem); font-weight: 700; line-height: 1.16; }
.hero-sub { color: var(--text-muted); font-size: 1.05rem; max-width: 52ch; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 4px; }

.btn {
  font-family: var(--font-body); font-weight: 600; font-size: 0.95rem;
  padding: 12px 22px; border-radius: 999px; display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid transparent; transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 8px 20px color-mix(in srgb, var(--primary) 35%, transparent); }
.btn-primary:hover { box-shadow: 0 10px 26px color-mix(in srgb, var(--primary) 45%, transparent); }
.btn-ghost { background: transparent; border-color: var(--border); color: var(--text); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary-700); }

.stack-strip {
  margin-top: 8px; font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-faint);
  display: flex; flex-wrap: wrap; gap: 8px;
}

/* ============================================================
   ABOUT
   ============================================================ */
.about-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 48px; align-items: start; }
.about-text { color: var(--text-muted); font-size: 1.05rem; max-width: 58ch; }
.about-facts { display: flex; flex-direction: column; gap: 20px; }
.fact dt { font-family: var(--font-mono); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-faint); margin-bottom: 4px; }
.fact dd { font-weight: 600; }
.fact-sub { font-weight: 400; color: var(--text-muted); font-size: 0.9rem; }

/* ============================================================
   EXPERIENCE — changelog
   ============================================================ */
.changelog { border: 1px solid var(--border); border-radius: var(--radius-lg); background: var(--surface); overflow: hidden; margin-bottom: 28px; }
.changelog-company {
  display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: 6px;
  padding: 18px 24px; background: var(--surface-2); border-bottom: 1px solid var(--border);
}
.company-mark { font-family: var(--font-display); font-weight: 700; font-size: 1.05rem; }
.company-loc { font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-faint); }

.changelog-entry { padding: 24px; border-bottom: 1px solid var(--border); position: relative; }
.changelog-entry:last-child { border-bottom: none; }
.changelog-entry::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--border);
}
.changelog-entry.is-current::before { background: var(--fresh); }

.entry-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 6px; }
.entry-version { font-family: var(--font-mono); font-weight: 700; color: var(--primary-700); font-size: 0.85rem; }
html[data-theme="dark"] .entry-version { color: var(--fresh-soft); }
.entry-current-badge {
  font-family: var(--font-mono); font-size: 0.68rem; font-weight: 700; letter-spacing: 0.04em;
  color: var(--fresh); background: color-mix(in srgb, var(--fresh) 14%, transparent); border-radius: 999px; padding: 2px 9px;
  border: 1px solid color-mix(in srgb, var(--fresh) 35%, transparent);
}
.entry-role { font-weight: 700; font-size: 1.08rem; margin-bottom: 2px; }
.entry-meta { font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-faint); margin-bottom: 12px; }
.entry-bullets { margin: 0; padding-left: 20px; color: var(--text-muted); display: flex; flex-direction: column; gap: 6px; }
.entry-bullets li { padding-left: 2px; }

.achievement-card {
  border: 1px solid var(--border); border-radius: var(--radius-md); background: var(--surface);
  padding: 22px 24px; margin-top: 16px;
}
.achievement-card-secondary { background: transparent; }
.achv-tag {
  font-family: var(--font-mono); font-size: 0.7rem; font-weight: 700; letter-spacing: 0.06em;
  color: var(--primary-700); margin-bottom: 8px;
}
html[data-theme="dark"] .achv-tag { color: var(--fresh-soft); }
.achv-title { font-size: 1.05rem; font-weight: 700; margin-bottom: 4px; }
.achv-meta { font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-faint); margin-bottom: 10px; }
.achv-desc { color: var(--text-muted); max-width: 68ch; }

/* ============================================================
   SKILLS
   ============================================================ */
.skills-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.skill-group h3 { font-size: 0.95rem; margin-bottom: 14px; color: var(--text); }
.chip-row { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  font-family: var(--font-mono); font-size: 0.78rem; padding: 6px 12px; border-radius: 999px;
  background: var(--surface); border: 1px solid var(--border); color: var(--text-muted);
}

/* ============================================================
   CERTIFICATIONS
   ============================================================ */
.cert-tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 28px; }
.cert-tab {
  font-family: var(--font-mono); font-size: 0.82rem; font-weight: 600; cursor: pointer;
  padding: 8px 16px; border-radius: 999px; border: 1px solid var(--border); background: var(--surface); color: var(--text-muted);
}
.cert-tab[aria-selected="true"] { background: var(--primary); border-color: var(--primary); color: #fff; }

.cert-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 18px; }
.cert-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-md);
  overflow: hidden; cursor: pointer; text-align: left; padding: 0; display: flex; flex-direction: column;
  transition: transform 0.15s ease, box-shadow 0.15s ease; font-family: var(--font-body); color: var(--text);
}
.cert-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.cert-thumb { width: 100%; aspect-ratio: 4/3; object-fit: cover; background: var(--surface-2); display: block; }
.cert-body { padding: 13px 15px 16px; }
.cert-title { font-weight: 600; font-size: 0.92rem; line-height: 1.35; margin-bottom: 4px; }
.cert-meta { font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-faint); }

.cert-pagination {
  display: flex; align-items: center; justify-content: center; gap: 6px;
  margin-top: 32px; flex-wrap: wrap; font-family: var(--font-mono);
}
.page-btn {
  min-width: 38px; height: 38px; padding: 0 10px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--surface); color: var(--text-muted);
  font-family: var(--font-mono); font-size: 0.85rem; font-weight: 600; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
  transition: border-color 0.15s ease, color 0.15s ease;
}
.page-btn:hover:not(:disabled) { border-color: var(--primary); color: var(--primary-700); }
html[data-theme="dark"] .page-btn:hover:not(:disabled) { color: var(--fresh-soft); }
.page-btn[aria-current="true"] { background: var(--primary); border-color: var(--primary); color: #fff; }
.page-btn:disabled { opacity: 0.35; cursor: not-allowed; }
.page-ellipsis { color: var(--text-faint); padding: 0 4px; }

/* ============================================================
   CONTACT
   ============================================================ */
.contact-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 16px; }
.contact-card {
  display: flex; flex-direction: column; gap: 6px; padding: 22px; border-radius: var(--radius-md);
  background: var(--surface); border: 1px solid var(--border); transition: border-color 0.15s ease, transform 0.15s ease;
}
.contact-card:not(.contact-card-static):hover { border-color: var(--primary); transform: translateY(-2px); }
.contact-icon { display: flex; align-items: center; justify-content: center; width: 34px; height: 34px; border-radius: var(--radius-sm, 8px); background: var(--bg-alt, rgba(127,127,127,0.1)); color: var(--primary); margin-bottom: 4px; }
.contact-icon svg { width: 18px; height: 18px; }
.contact-label { font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-faint); }
.contact-value { font-weight: 600; font-size: 1.02rem; word-break: break-word; }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer { border-top: 1px solid var(--border); padding: 26px 0; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; }
.footer-inner { font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-faint); }
.footer-status { display: flex; align-items: center; gap: 7px; }
.status-code-sm { color: var(--fresh); font-weight: 600; }

/* ============================================================
   LIGHTBOX
   ============================================================ */
.lightbox {
  position: fixed; inset: 0; background: rgba(4, 10, 18, 0.86); z-index: 1000;
  display: none; align-items: center; justify-content: center; flex-direction: column; padding: 40px 20px;
  backdrop-filter: blur(4px);
}
.lightbox.open { display: flex; }
.lightbox img { max-width: min(90vw, 900px); max-height: 78vh; border-radius: var(--radius-sm); box-shadow: var(--shadow-lg); }
.lightbox-caption { color: #DCEAF4; font-family: var(--font-mono); font-size: 0.85rem; margin-top: 16px; text-align: center; }
.lightbox-close {
  position: absolute; top: 20px; right: 24px; width: 42px; height: 42px; border-radius: 50%;
  background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.2); color: #fff; font-size: 1.5rem;
  cursor: pointer; line-height: 1;
}

/* ============================================================
   FOCUS STATES
   ============================================================ */
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 4px;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .console { order: 2; }
  .about-grid { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .main-nav { display: none; }
  .icon-btn.mobile-only { display: grid; }
  .section { padding: 60px 0; }
  .hero { padding: 40px 0 60px; }
  .skills-grid { grid-template-columns: 1fr; }
  .cert-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
  .topbar-inner { padding: 14px 18px; }
  .section-inner, .hero-inner, .footer-inner { padding: 0 18px; }
}