@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,400;0,9..144,600;0,9..144,700;1,9..144,500&family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  /* DARK THEME (default) */
  --ink:        #0b0e14;
  --surface:    #12161d;
  --surface-2:  #191f29;
  --line:       #262d38;
  --paper:      #ede7db;
  --paper-dim:  #b9b3a4;
  --brass:      #e2a63c;
  --brass-dim:  #ad7f2e;
  --teal:       #5fb8ab;
  --muted:      #7c8494;
}

/* LIGHT THEME */
html[data-theme="light"] {
  --ink: #f8fafc;
  --surface: #ffffff;
  --surface-2: #f1f5f9;
  --line: #d6dce5;

  --paper: #111827;
  --paper-dim: #4b5563;
  --muted: #6b7280;

  --brass: #c18a1b;
  --brass-dim: #a77416;
  --teal: #0f766e;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { margin: 0; padding: 0; list-style: none; }

.wrap {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
}

::selection { background: var(--brass); color: var(--ink); }

:focus-visible {
  outline: 2px solid var(--brass);
  outline-offset: 3px;
}

/* ---------- Eyebrow / mono labels ---------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--brass);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.eyebrow::before {
  content: "";
  width: 16px;
  height: 1px;
  background: var(--brass);
  display: inline-block;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  margin: 0;
  color: var(--paper);
  letter-spacing: -0.01em;
}

.section-head { margin-bottom: 44px; }
.section-head h2 {
  font-size: clamp(28px, 4vw, 40px);
  margin-top: 10px;
}
.section-head p {
  color: var(--muted);
  max-width: 1200px;
  margin-top: 10px;
  text-align: justify;
}

section { padding: 96px 0; }
section.tight { padding: 64px 0; }

hr.rule {
  border: none;
  border-top: 1px solid var(--line);
  margin: 0;
}

/* ---------- Contour signature (background + divider) ---------- */
.contour-field {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  opacity: 0.5;
}
.contour-field svg { width: 100%; height: 100%; }
.contour-field path {
  fill: none;
  stroke: var(--line);
  stroke-width: 1;
}
.contour-field path.accent { stroke: var(--brass-dim); opacity: 0.55; }

.contour-divider {
  width: 100%;
  height: 34px;
  display: block;
  color: var(--line);
}

/* ---------- Nav ---------- */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;

  background: rgba(18, 22, 29, 0.60);
  backdrop-filter: blur(14px);

  border-bottom: 1px solid var(--line);

  transition: all 0.3s ease;
}
.site-nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.brand {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 20px;
  color: var(--paper);
  display: flex;
  align-items: center;
  gap: 8px;
}
.brand span { color: var(--brass); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-links a {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--paper-dim);
  padding: 8px 14px;
  border-radius: 6px;
  transition: color 0.2s ease, background 0.2s ease;
}
.nav-links a:hover { color: var(--paper); background: var(--surface-2); }
.nav-links a.active { color: var(--brass); }

.nav-cta {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink) !important;
  background: var(--brass);
  padding: 9px 16px !important;
  border-radius: 6px;
  font-weight: 600;
}
.nav-cta:hover { background: var(--paper) !important; color: var(--ink) !important; }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--paper);
  width: 40px; height: 40px;
  font-size: 18px;
  cursor: pointer;
}

.theme-toggle {
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--surface);

  color: var(--paper);
  display: flex;
  align-items: center;
  justify-content: center;

  cursor: pointer;

  transition: all 0.25s ease;
  box-shadow: 0 6px 18px rgba(0,0,0,0.08);
}

/* icon */
.theme-toggle i {
  font-size: 18px;
  transition: transform 0.3s ease;
}

/* hover */
.theme-toggle:hover {
  color: var(--brass);
  border-color: var(--brass);
  transform: translateY(-2px) rotate(15deg);
  box-shadow: 0 10px 25px rgba(226,166,60,0.15);
}

/* click effect */
.theme-toggle:active {
  transform: scale(0.92);
}

/* LIGHT theme improvement */
html[data-theme="light"] .theme-toggle {
  background: #fff;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
}

@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute;
    top: 68px; left: 0; right: 0;
    background: var(--ink);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: stretch;
    padding: 12px;
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 14px; }
}

/* ---------- Buttons ---------- */
.btn {
  font-family: var(--font-mono);
  font-size: 13.5px;
  font-weight: 500;
  padding: 13px 22px;
  border-radius: 7px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
  cursor: pointer;
  border: 1px solid transparent;
}
.btn-solid { background: var(--brass); color: var(--ink); }
.btn-solid:hover { background: #f0b654; transform: translateY(-2px); }
.btn-line { border-color: var(--line); color: var(--paper); }
.btn-line:hover { border-color: var(--brass); color: var(--brass); transform: translateY(-2px); }

/* ---------- Card base (used by every page) ---------- */
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 26px;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.card:hover {
  transform: translateY(-6px);
  border-color: var(--brass-dim);
  box-shadow: 0 20px 40px rgba(0,0,0,0.35);
}

/* ---------- Project cards (used on home + projects page) ---------- */
.project-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.project-card { position: relative; }
.project-year {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
}
.project-card h3 { font-size: 21px; margin-top: 10px; }
.project-card p.desc {
  color: var(--muted);
  font-size: 14px;
  margin-top: 10px;
  line-height: 1.55;
}
.stack-line {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.stack-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--teal);
  border: 1px solid rgba(95,184,171,0.35);
  padding: 4px 9px;
  border-radius: 5px;
}
.project-status {
  position: absolute;
  top: 26px; right: 26px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--brass);
  border: 1px solid var(--brass-dim);
  padding: 4px 9px;
  border-radius: 20px;
}
@media (max-width: 760px) {
  .project-grid { grid-template-columns: 1fr; }
}

/* ---------- Summary block (used on home + about) ---------- */
.summary-block {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 40px;
}
.summary-block p { color: var(--paper-dim); font-size: 16px; max-width: 1200px; text-align: justify; }

/* ---------- Featured credential spotlight (used on home + about) ---------- */
.credential-spotlight {
  position: relative;
  background: linear-gradient(155deg, var(--surface) 0%, var(--surface-2) 100%);
  border: 1px solid var(--brass-dim);
  border-radius: 16px;
  padding: 40px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 28px;
  align-items: flex-start;
  overflow: hidden;
}
.credential-spotlight::after {
  content: "";
  position: absolute;
  top: -40%; right: -10%;
  width: 260px; height: 260px;
  background: radial-gradient(circle, rgba(226,166,60,0.14), transparent 70%);
  pointer-events: none;
}
.credential-icon {
  width: 56px; height: 56px;
  border-radius: 14px;
  background: var(--brass);
  color: var(--ink);
  display: flex; align-items: center; justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
}
.credential-spotlight .duration-tag {
  position: absolute;
  top: 28px; right: 32px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--brass);
  border: 1px solid var(--brass-dim);
  padding: 5px 10px;
  border-radius: 20px;
}
.credential-spotlight h3 { font-size: 22px; }
.credential-spotlight .credential-org {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--muted);
  margin-top: 4px;
}
.credential-spotlight p.desc {
  color: var(--paper-dim);
  font-size: 14.5px;
  margin-top: 14px;
  max-width: 1200px;
  line-height: 1.6;
  text-align: justify;
}
@media (max-width: 640px) {
  .credential-spotlight { grid-template-columns: 1fr; }
  .credential-spotlight .duration-tag { position: static; display: inline-block; margin-top: 14px; }
}

/* ---------- CTA band (used on home, about, projects) ---------- */
.cta-band {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.cta-band h3 { font-size: 26px; }
.cta-band p { color: var(--muted); margin-top: 8px; }

/* ---------- Page header (about, projects, contact) ---------- */
.page-head {
  padding: 150px 0 60px;
  position: relative;
  overflow: hidden;
}
.page-head h1 {
  font-size: clamp(34px, 5vw, 52px);
  margin-top: 12px;
}
.page-head p { color: var(--muted); margin-top: 14px; max-width: 1200px;text-align: justify; }

/* ---------- Footer (every page) ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding-top: 70px;
  position: relative;
  overflow: hidden;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.1fr;
  gap: 40px;
  padding-bottom: 50px;
}
.footer-brand-block .brand { font-size: 17px; }
.footer-brand-block p {
  color: var(--muted);
  font-size: 14px;
  margin-top: 14px;
  max-width: 280px;
  line-height: 1.6;
}
.footer-col h5 {
  font-family: var(--font-mono);
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--brass);
  margin-bottom: 18px;
}
.footer-col ul li { margin-bottom: 11px; }
.footer-col a {
  color: var(--paper-dim);
  font-size: 14px;
  transition: color 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.footer-col a:hover { color: var(--brass); }
.footer-col a i { font-size: 13px; color: var(--muted); }

.footer-bottom {
  border-top: 1px solid var(--line);
  padding: 22px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
}
.footer-bottom .foot-brand {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--muted);
}
.foot-social { display: flex; gap: 10px; }
.foot-social a {
  width: 36px; height: 36px;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: var(--paper-dim);
  transition: 0.2s ease;
}
.foot-social a:hover { color: var(--brass); border-color: var(--brass-dim); }

@media (max-width: 860px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 540px) {
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
}

/* ---------- Scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.in { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}