:root {
  --bg: #0d1117;
  --bg-soft: #161b22;
  --bg-card: #161b22;
  --border: #21262d;
  --border-soft: #2d333b;
  --text: #e6edf3;
  --text-dim: #9aa5b1;
  --text-faint: #6e7681;
  --accent: #ef4444;       /* red */
  --accent-soft: rgba(239, 68, 68, 0.12);
  --link: #38bdf8;         /* celeste — hyperlinks */
  --live: #3fb950;
  --dev: #d29922;
  --max: 920px;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "Inter", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  background-image:
    radial-gradient(900px 500px at 80% -10%, rgba(239, 68, 68, 0.06), transparent),
    radial-gradient(700px 400px at 0% 0%, rgba(88, 166, 255, 0.05), transparent);
  background-attachment: fixed;
}

a { color: inherit; text-decoration: none; }

/* ===== HEADER (sticky: nav row + tab bar) ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(13, 17, 23, 0.82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 0.8rem max(1.5rem, calc((100% - var(--max)) / 2));
}
.nav-brand { font-weight: 800; font-size: 1.15rem; letter-spacing: -0.02em; display: inline-flex; align-items: center; }
.nav-brand .dot { color: var(--accent); }
.nav-brand .leaf {
  width: 1em;
  height: 1em;
  margin-right: 0.18em;
  fill: #6db33f;            /* Spring Boot green */
  transform: rotate(-8deg);
  transition: transform 0.2s;
}
.nav-brand:hover .leaf { transform: rotate(0deg) scale(1.08); }
/* ===== TAB BAR ===== */
.tabbar {
  display: flex;
  gap: 0.3rem;
  padding: 0 max(1.5rem, calc((100% - var(--max)) / 2));
  overflow-x: auto;
  scrollbar-width: none;
}
.tabbar::-webkit-scrollbar { display: none; }
.tab {
  flex: none;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-dim);
  font-family: inherit;
  font-size: 0.92rem;
  font-weight: 500;
  padding: 0.65rem 0.7rem;
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.15s, border-color 0.15s;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }

.lang-toggle {
  font-family: var(--mono);
  font-size: 0.8rem;
  background: var(--bg-soft);
  border: 1px solid var(--border-soft);
  border-radius: 7px;
  padding: 0.35rem 0.6rem;
  color: var(--text-faint);
  cursor: pointer;
  display: flex;
  gap: 0.35rem;
  transition: border-color 0.15s;
}
.lang-toggle:hover { border-color: var(--accent); }
.lang-opt { transition: color 0.15s; }
.lang-opt.active { color: var(--accent); font-weight: 600; }
.lang-sep { color: var(--text-faint); }

/* ===== LAYOUT ===== */
main { max-width: var(--max); margin: 0 auto; padding: 0 1.5rem; }
.panel { padding: 1rem 0 4.5rem; border-top: 1px solid var(--border); }
.panel[hidden] { display: none; }

.section-title {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 2rem;
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
}
.section-title .num {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 500;
}

/* ===== HERO ===== */
.hero { padding: 5.5rem 0 4rem; }
.hero-eyebrow {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 1rem;
}
.hero-name {
  font-size: clamp(2.6rem, 7vw, 4.2rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: 1.2rem;
}
.hero-subtitle {
  font-size: clamp(1.1rem, 2.2vw, 1.3rem);
  font-weight: 600;
  color: var(--accent);
  letter-spacing: -0.01em;
  margin-bottom: 1.5rem;
}
.hero-quote {
  position: relative;
  max-width: 640px;
  margin: 0 0 2.2rem;
  padding-left: 1.4rem;
  border-left: 2px solid var(--border-soft);
}
.hero-quote p {
  font-size: clamp(1.05rem, 2.2vw, 1.3rem);
  font-style: italic;
  color: var(--text-dim);
  line-height: 1.6;
}
.hero-quote .accent { color: var(--text); font-style: italic; font-weight: 500; }

.hero-links { display: flex; flex-wrap: wrap; gap: 0.7rem; }
.btn {
  font-size: 0.92rem;
  font-weight: 500;
  padding: 0.6rem 1.1rem;
  border: 1px solid var(--border-soft);
  border-radius: 9px;
  background: var(--bg-soft);
  color: var(--text);
  transition: border-color 0.15s, transform 0.15s, background 0.15s;
}
.btn:hover { border-color: var(--accent); transform: translateY(-2px); }
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); font-weight: 600; }
.btn-primary:hover { background: #dc2626; }

/* ===== ABOUT ===== */
.about-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 3rem; }
.about-text p { margin-bottom: 1.1rem; color: var(--text-dim); }
.about-text p:first-child { color: var(--text); font-size: 1.05rem; }

.side-block { margin-bottom: 1.8rem; }
.side-block h3 {
  font-family: var(--mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-faint);
  margin-bottom: 0.8rem;
}
.tag-list { list-style: none; display: flex; flex-wrap: wrap; gap: 0.45rem; }
.tag-list li {
  font-size: 0.82rem;
  font-family: var(--mono);
  padding: 0.25rem 0.6rem;
  background: var(--accent-soft);
  border: 1px solid rgba(239, 68, 68, 0.2);
  border-radius: 6px;
  color: var(--accent);
}
.lang-block { list-style: none; display: flex; flex-direction: column; gap: 0.65rem; }
.lang-block li { font-size: 0.9rem; color: var(--text-dim); }
.lang-block strong { color: var(--text); display: inline-block; min-width: 5.5rem; }

/* ===== TIMELINE (experience / education) ===== */
.timeline { display: flex; flex-direction: column; gap: 1.1rem; }
.job {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 2px solid var(--accent);
  border-radius: 10px;
  padding: 1.4rem 1.5rem;
}
.job-head { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.job-head h3 { font-size: 1.1rem; font-weight: 700; letter-spacing: -0.01em; }
.job-date { font-family: var(--mono); font-size: 0.78rem; color: var(--text-faint); white-space: nowrap; }
.job-company { color: var(--accent); font-size: 0.9rem; font-weight: 500; margin: 0.15rem 0 0.9rem; }
.job-bullets { list-style: none; display: flex; flex-direction: column; gap: 0.6rem; margin-bottom: 1rem; }
.job-bullets li { position: relative; padding-left: 1.1rem; color: var(--text-dim); font-size: 0.92rem; }
.job-bullets li::before { content: "▹"; position: absolute; left: 0; color: var(--accent); }
.job .stack-row { margin-bottom: 0; }

/* ===== PROJECTS ===== */
.projects { display: grid; gap: 1.1rem; }
.project {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem 1.6rem;
  transition: border-color 0.2s, transform 0.2s;
}
.project:hover { border-color: var(--border-soft); transform: translateY(-3px); }
.project-head { display: flex; align-items: center; gap: 0.8rem; margin-bottom: 0.7rem; flex-wrap: wrap; }
.project-head h3 { font-size: 1.18rem; font-weight: 700; letter-spacing: -0.01em; }
.project p { color: var(--text-dim); font-size: 0.95rem; margin-bottom: 1rem; }

.badge {
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.55rem;
  border-radius: 20px;
}
.badge-live { color: var(--live); background: rgba(63, 185, 80, 0.12); border: 1px solid rgba(63, 185, 80, 0.3); }
.badge-dev { color: var(--dev); background: rgba(210, 153, 34, 0.12); border: 1px solid rgba(210, 153, 34, 0.3); }

.components { list-style: none; display: flex; flex-direction: column; gap: 0.85rem; margin-bottom: 1.2rem; }
.component { display: flex; gap: 0.85rem; align-items: flex-start; }
.comp-status {
  flex: none;
  width: 6.2rem;
  margin-top: 0.15rem;
  font-family: var(--mono);
  font-size: 0.66rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-align: center;
  padding: 0.2rem 0.3rem;
  border-radius: 20px;
}
.component.done .comp-status { color: var(--live); background: rgba(63, 185, 80, 0.12); border: 1px solid rgba(63, 185, 80, 0.3); }
.component.dev .comp-status { color: var(--dev); background: rgba(210, 153, 34, 0.12); border: 1px solid rgba(210, 153, 34, 0.3); }
.component strong { display: block; font-size: 0.95rem; color: var(--text); margin-bottom: 0.1rem; }
.component > div span { display: block; font-size: 0.88rem; color: var(--text-dim); margin-bottom: 0; }
.comp-link { display: inline-block; margin-top: 0.35rem; font-size: 0.85rem; color: var(--link); font-weight: 500; transition: opacity 0.15s; }
.comp-link:hover { opacity: 0.7; }

.stack-row { list-style: none; display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1rem; }
.stack-row li {
  font-size: 0.76rem;
  font-family: var(--mono);
  color: var(--text-faint);
  padding: 0.18rem 0.5rem;
  border: 1px solid var(--border-soft);
  border-radius: 5px;
}
.project-links { display: flex; flex-wrap: wrap; gap: 1.2rem; }
.project-links a { font-size: 0.88rem; color: var(--link); font-weight: 500; transition: opacity 0.15s; }
.project-links a:hover { opacity: 0.7; }

.project-note {
  font-size: 0.85rem !important;
  color: var(--text-faint) !important;
  border-left: 2px solid var(--border-soft);
  padding-left: 0.8rem;
  margin: 0.2rem 0 1rem !important;
}

/* ===== CONTACT ===== */
.panel-contact { text-align: center; }
.panel-contact .section-title { justify-content: center; }
.contact-lead { color: var(--text-dim); margin-bottom: 2rem; font-size: 1.1rem; }
.panel-contact .hero-links { justify-content: center; }

/* ===== FOOTER ===== */
.footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 3.5rem;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-faint);
  font-size: 0.85rem;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 720px) {
  .about-grid { grid-template-columns: 1fr; gap: 2.2rem; }
  .panel { padding: 1rem 0 3rem; }
  .hero { padding: 3rem 0 2.5rem; }
  .tabbar { gap: 0.1rem; }
  .tab { padding: 0.6rem 0.55rem; font-size: 0.86rem; }
}