/* ============================================================
   TOKENS
   ============================================================ */
:root {
  --navy:       #141572;
  --midnight:   #0B0E40;
  --ivory:      #F4EFE6;
  --ivory-dark: #E8E2D9;
  --copper:     #C9A84C;
  --copper-dim: rgba(201, 168, 76, 0.18);
  --charcoal:   #2A2A2A;
  --white:      #FFFFFF;

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

  --radius:     4px;
  --ease:       0.2s ease;
  --max-w:      880px;
}

/* ============================================================
   RESET & BASE
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  line-height: 1.65;
  color: var(--charcoal);
  background: var(--ivory);
  opacity: 0;
  transition: opacity 0.4s ease;
}

body.loaded { opacity: 1; }

img { display: block; max-width: 100%; }

ul { list-style: none; }

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

/* ============================================================
   NAVIGATION
   ============================================================ */
.site-nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  height: 56px;
  background: var(--midnight);
  border-bottom: 1px solid var(--copper-dim);
}

.nav-name {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--white);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  font-size: 0.78rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.6);
  letter-spacing: 0.07em;
  text-transform: uppercase;
  transition: color var(--ease);
}

.nav-links a:hover { color: var(--copper); }

.nav-burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.nav-burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--ease);
}

@media (max-width: 640px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--midnight);
    border-bottom: 1px solid var(--copper-dim);
    padding: 0.5rem 0 1rem;
  }

  .nav-links.open { display: flex; }

  .nav-links a {
    display: block;
    padding: 0.65rem 2rem;
    font-size: 0.85rem;
  }

  .nav-burger { display: flex; }
}

/* ============================================================
   HERO
   ============================================================ */
#hero {
  min-height: 100svh;
  background: var(--midnight);
  display: flex;
  align-items: center;
  padding: 7rem 2rem 4rem;
}

.hero-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 3rem;
  align-items: center;
}

.avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--copper);
}

.hero-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--copper);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 0.6rem;
}

.hero-text h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 700;
  color: var(--white);
  line-height: 1.1;
  margin-bottom: 1.1rem;
}

.hero-tagline {
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2.2vw, 1.4rem);
  font-weight: 500;
  color: var(--copper);
  line-height: 1.4;
  margin-bottom: 0.9rem;
}

.hero-sub {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.55);
  max-width: 500px;
  line-height: 1.75;
  margin-bottom: 2rem;
}

.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  align-items: center;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1.2rem;
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: all var(--ease);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--copper);
  color: var(--midnight);
}

.btn-primary:hover {
  background: #dab95e;
}

.btn-secondary {
  background: transparent;
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.28);
}

.btn-secondary:hover {
  border-color: var(--copper);
  color: var(--copper);
}

.btn-ghost {
  color: rgba(255, 255, 255, 0.5);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 400;
  text-decoration: underline;
  text-underline-offset: 3px;
  padding: 0;
}

.btn-ghost:hover { color: var(--white); }

@media (max-width: 580px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    text-align: center;
  }

  .avatar {
    margin: 0 auto;
    width: 96px;
    height: 96px;
  }

  .hero-sub { margin-left: auto; margin-right: auto; }
  .hero-links { justify-content: center; }
}

/* ============================================================
   METRICS STRIP
   ============================================================ */
#metrics {
  background: var(--navy);
  padding: 3.5rem 2rem;
}

.metrics-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 2rem 1rem;
  text-align: center;
}

.metric-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
}

.metric-number {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  color: var(--copper);
  line-height: 1;
}

.metric-label {
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.45);
  letter-spacing: 0.07em;
  text-transform: uppercase;
  max-width: 120px;
  line-height: 1.4;
}

/* ============================================================
   SHARED SECTION STYLES
   ============================================================ */
.section-header {
  max-width: var(--max-w);
  margin: 0 auto 2.5rem;
  padding: 0 0.5rem;
}

.section-header h2 {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.8vw, 1.8rem);
  font-weight: 700;
  color: var(--charcoal);
  padding-bottom: 0.6rem;
  position: relative;
  display: inline-block;
}

.section-header h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 2.2rem;
  height: 3px;
  background: var(--copper);
  border-radius: 2px;
}

/* light variant (dark background) */
.section-header--light h2 {
  color: var(--white);
}

/* ============================================================
   EXPERIENCE — TIMELINE
   ============================================================ */
#experience {
  padding: 5rem 2rem;
  background: var(--ivory);
}

.timeline {
  max-width: var(--max-w);
  margin: 0 auto;
  position: relative;
  padding-left: 2.25rem;
}

/* The copper thread */
.timeline::before {
  content: '';
  position: absolute;
  left: 4px;
  top: 16px;
  bottom: 16px;
  width: 2px;
  background: linear-gradient(to bottom, var(--copper), rgba(201, 168, 76, 0.2));
}

.timeline-item {
  position: relative;
  margin-bottom: 0.5rem;
}

.timeline-node {
  position: absolute;
  left: -2.25rem;
  top: 18px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--copper);
  border: 2px solid var(--ivory);
  box-shadow: 0 0 0 2px var(--copper);
}

.timeline-content {
  border-radius: var(--radius);
  overflow: hidden;
}

.timeline-toggle {
  width: 100%;
  background: none;
  border: none;
  text-align: left;
  cursor: pointer;
  padding: 1.1rem 1.25rem;
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  gap: 0.2rem 0.75rem;
  border-radius: var(--radius);
  transition: background var(--ease);
}

.timeline-toggle:hover {
  background: rgba(20, 21, 114, 0.06);
}

.timeline-meta {
  grid-column: 1;
  grid-row: 1;
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.timeline-company {
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--copper);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.timeline-period {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: rgba(42, 42, 42, 0.4);
}

.timeline-role {
  grid-column: 1;
  grid-row: 2;
  font-family: var(--font-display);
  font-size: 0.97rem;
  font-weight: 600;
  color: var(--charcoal);
  line-height: 1.3;
}

.timeline-chevron {
  grid-column: 2;
  grid-row: 1 / 3;
  align-self: center;
  font-size: 1rem;
  color: var(--copper);
  transition: transform var(--ease);
  line-height: 1;
}

.timeline-toggle[aria-expanded="true"] .timeline-chevron {
  transform: rotate(180deg);
}

.timeline-detail {
  padding: 0 1.25rem 1.25rem 1.25rem;
}

.timeline-detail ul {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  margin-bottom: 1rem;
}

.timeline-detail li {
  font-size: 0.875rem;
  color: var(--charcoal);
  line-height: 1.65;
  padding-left: 1.1rem;
  position: relative;
}

.timeline-detail li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--copper);
  font-size: 0.75rem;
  top: 0.05em;
}

.detail-link {
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--navy);
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--copper);
  padding-bottom: 1px;
  transition: color var(--ease);
}

.detail-link:hover { color: var(--copper); }

/* ============================================================
   SKILLS
   ============================================================ */
#skills {
  padding: 5rem 2rem;
  background: var(--white);
}

.skills-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 2.5rem;
}

.skill-group h3 {
  font-family: var(--font-display);
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--navy);
  margin-bottom: 0.8rem;
  padding-bottom: 0.45rem;
  border-bottom: 2px solid var(--copper);
  display: inline-block;
}

.skill-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.chip {
  display: inline-block;
  padding: 0.28rem 0.65rem;
  background: var(--ivory);
  border: 1px solid var(--ivory-dark);
  border-radius: 100px;
  font-family: var(--font-body);
  font-size: 0.76rem;
  color: var(--charcoal);
  line-height: 1.5;
}

.chip.certified {
  background: rgba(20, 21, 114, 0.07);
  border-color: rgba(20, 21, 114, 0.25);
  color: var(--navy);
  font-weight: 500;
}

/* ============================================================
   BUILT
   ============================================================ */
#built {
  background: var(--midnight);
  padding: 4rem 2rem;
}

.built-strip {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 1.25rem;
}

.built-item {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 1.25rem 1.35rem;
  border: 1px solid var(--copper-dim);
  border-radius: var(--radius);
  transition: border-color var(--ease), background var(--ease);
}

.built-item:hover {
  border-color: var(--copper);
  background: rgba(201, 168, 76, 0.05);
}

.built-label {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--copper);
}

.built-desc {
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.45);
  line-height: 1.55;
}

/* ============================================================
   FORMATION
   ============================================================ */
#formation {
  padding: 4rem 2rem;
  background: var(--ivory);
}

.accordion-header {
  margin-bottom: 0;
}

.accordion-toggle {
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  text-align: left;
  width: fit-content;
}

.accordion-toggle h2 {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.8vw, 1.8rem);
  font-weight: 700;
  color: var(--charcoal);
  padding-bottom: 0.6rem;
  position: relative;
  display: inline-block;
}

.accordion-toggle h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 2.2rem;
  height: 3px;
  background: var(--copper);
  border-radius: 2px;
}

.accordion-chevron {
  font-size: 1rem;
  color: var(--copper);
  margin-top: 0.4rem;
  transition: transform var(--ease);
  flex-shrink: 0;
}

.accordion-toggle[aria-expanded="true"] .accordion-chevron {
  transform: rotate(180deg);
}

.formation-inner {
  max-width: var(--max-w);
  margin: 2rem auto 0;
}

.formation-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}

.formation-item {
  padding: 1.1rem 1.25rem;
  background: var(--white);
  border-radius: var(--radius);
  border-left: 3px solid var(--copper);
}

.formation-item h4 {
  font-family: var(--font-display);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--charcoal);
  margin-bottom: 0.3rem;
  line-height: 1.35;
}

.formation-item p {
  font-size: 0.78rem;
  color: rgba(42, 42, 42, 0.6);
  line-height: 1.55;
}

.formation-note {
  font-size: 0.75rem !important;
  color: var(--navy) !important;
  font-style: italic;
  margin-top: 0.2rem;
}

.formation-subheader {
  font-family: var(--font-display);
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--navy);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--ivory-dark);
}

.doc-link {
  display: inline-block;
  margin-top: 0.5rem;
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--navy);
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--copper);
  padding-bottom: 1px;
  transition: color var(--ease);
}

.doc-link:hover { color: var(--copper); }

/* ============================================================
   FOOTER / CONTACT
   ============================================================ */
footer {
  background: var(--midnight);
  padding: 4.5rem 2rem;
  text-align: center;
  border-top: 1px solid var(--copper-dim);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.65rem;
}

.footer-tagline {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 3vw, 1.6rem);
  font-weight: 700;
  color: var(--white);
}

.footer-email {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--copper);
  transition: opacity var(--ease);
}

.footer-email:hover { opacity: 0.75; }

.footer-links {
  display: flex;
  gap: 1.5rem;
  margin-top: 0.5rem;
}

.footer-links a {
  font-size: 0.72rem;
  color: rgba(255, 255, 255, 0.4);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: color var(--ease);
}

.footer-links a:hover { color: var(--copper); }

/* ============================================================
   REDUCED MOTION
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  html { scroll-behavior: auto; }
  body { opacity: 1; transition: none; }
}