/* ── Reset & tokens ───────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:      #f7f4ef;
  --bg-alt:  #f0ece3;
  --surface: #e8e3d8;
  --border:  #b0a898;
  --text:    #111111;
  --muted:   #7a6e60;
  --accent:  #d62828;
  --tr:      .2s ease;
}

html { scroll-behavior: smooth; }

/* Graph-paper background */
body {
  background-color: var(--bg);
  background-image:
    linear-gradient(rgba(0,0,0,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,.05) 1px, transparent 1px),
    linear-gradient(rgba(0,0,0,.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,.02) 1px, transparent 1px);
  background-size: 100px 100px, 100px 100px, 20px 20px, 20px 20px;
  color: var(--text);
  font-family: system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}

/* ── Utility ──────────────────────────────────────────────── */
.container { max-width: 1060px; margin-inline: auto; padding-inline: 1.5rem; }
.container--narrow { max-width: 680px; }

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center;
  padding: .6rem 1.4rem;
  border-radius: 0;
  font-family: 'Courier New', monospace;
  font-size: .8rem; font-weight: 700;
  letter-spacing: .08em; text-transform: uppercase;
  text-decoration: none; cursor: pointer;
  border: 1.5px solid transparent;
  transition: background var(--tr), color var(--tr), border-color var(--tr);
  filter: url(#sketch);
}
.btn--primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn--primary:hover { background: #b01f1f; border-color: #b01f1f; }
.btn--ghost { background: transparent; color: var(--text); border-color: var(--text); }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn--full { width: 100%; justify-content: center; }

/* ── Nav ──────────────────────────────────────────────────── */
.nav {
  position: fixed; inset: 0 0 auto; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem 2rem;
  background: var(--bg);
  border-bottom: 1px solid transparent;
  transition: border-color var(--tr);
}
.nav.scrolled { border-color: var(--border); }

.nav__logo {
  font-family: 'Courier New', monospace;
  font-size: .9rem; font-weight: 700; letter-spacing: .1em;
  color: var(--text);
}

.nav__links { list-style: none; display: flex; gap: 2rem; }
.nav__links a {
  font-family: 'Courier New', monospace;
  color: var(--muted); text-decoration: none;
  font-size: .75rem; font-weight: 500;
  letter-spacing: .08em; text-transform: uppercase;
  transition: color var(--tr);
}
.nav__links a:hover,
.nav__links a.active { color: var(--accent); }

.nav__toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
.nav__toggle span { display: block; width: 22px; height: 1.5px; background: var(--text); }

@media (max-width: 640px) {
  .nav__toggle { display: flex; }
  .nav__links {
    position: fixed; inset: 0; background: var(--bg);
    flex-direction: column; align-items: center; justify-content: center;
    gap: 2.5rem; transform: translateX(100%); transition: transform var(--tr);
  }
  .nav__links.open { transform: translateX(0); }
  .nav__links a { font-size: 1rem; }
}

/* ── Hero ─────────────────────────────────────────────────── */
.hero {
  min-height: 100svh;
  display: flex; align-items: center; justify-content: space-between;
  gap: 4rem; padding: 8rem 2rem 4rem;
  max-width: 1060px; margin-inline: auto;
}

.hero__role {
  font-family: 'Courier New', monospace;
  font-size: .72rem; letter-spacing: .15em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 1rem;
}
.hero__title {
  font-family: 'Courier New', monospace;
  font-size: clamp(2.2rem, 5.5vw, 3.8rem);
  font-weight: 700; line-height: 1.1; margin-bottom: 1.25rem;
}
.hero__title .name { color: var(--accent); }
.hero__sub {
  color: var(--muted); max-width: 460px;
  font-size: .95rem; margin-bottom: 2rem; line-height: 1.8;
}
.hero__actions { display: flex; gap: .75rem; flex-wrap: wrap; }

/* Square avatar — like a technical drawing title block */
.hero__avatar {
  flex-shrink: 0;
  width: 260px; height: 300px;
  border: 1.5px solid var(--text);
  outline: 1px solid var(--border);
  outline-offset: 5px;
  display: grid; place-items: center;
  font-family: 'Courier New', monospace;
  font-size: 2rem; font-weight: 700;
  color: var(--accent); letter-spacing: .1em;
  background: var(--bg-alt);
  filter: url(#sketch);
  overflow: hidden;
}
.hero__avatar img {
  width: 100%; height: 100%;
  object-fit: cover; object-position: center top;
  display: block;
}

@media (max-width: 768px) {
  .hero {
    flex-direction: column-reverse; justify-content: center;
    text-align: center; padding-top: 6rem; gap: 2rem;
  }
  .hero__sub { margin-inline: auto; }
  .hero__actions { justify-content: center; }
  .hero__avatar { width: 160px; height: 185px; font-size: 1.5rem; }
}

/* ── Sections ─────────────────────────────────────────────── */
.section { padding: 6rem 0; }
.section--alt { background: var(--bg-alt); }

/* Auto-number sections like blueprint annotations */
body { counter-reset: section; }
.section__title {
  counter-increment: section;
  font-family: 'Courier New', monospace;
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  font-weight: 700; margin-bottom: 2.5rem; color: var(--text);
}
.section__title::before {
  content: '[0' counter(section) '] ';
  color: var(--accent); font-size: .8em; font-weight: 400;
}

/* ── About ────────────────────────────────────────────────── */
.about__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; }
.about__grid > p { color: var(--muted); font-size: .95rem; line-height: 1.85; }

.stats { display: flex; gap: 2.5rem; flex-wrap: wrap; }
.stat { display: flex; flex-direction: column; gap: .2rem; }
.stat__num {
  font-family: 'Courier New', monospace;
  font-size: 2.5rem; font-weight: 700; color: var(--accent); line-height: 1;
}
.stat__label { font-size: .78rem; color: var(--muted); }

@media (max-width: 640px) { .about__grid { grid-template-columns: 1fr; gap: 2rem; } }

/* ── Projects ─────────────────────────────────────────────── */
.projects {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

/* Outer card shell — fixed height so all cards are equal */
.card {
  height: 320px;
  perspective: 900px;
  cursor: pointer;
  opacity: 0; transform: translateY(16px);
  transition: opacity .5s ease, transform .5s ease;
}
.card.visible { opacity: 1; transform: translateY(0); }

/* 3-D rotating inner */
.card__inner {
  position: relative;
  width: 100%; height: 100%;
  transform-style: preserve-3d;
  transition: transform .55s cubic-bezier(.4, 0, .2, 1);
}
.card.flipped .card__inner { transform: rotateY(180deg); }

/* Shared front / back face styles */
.card__front,
.card__back {
  position: absolute; inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border: 1px solid var(--border);
  background: var(--bg-alt);
  display: flex; flex-direction: column;
  transition: border-color var(--tr);
  overflow: hidden;
}
.card__back { transform: rotateY(180deg); }
.card:hover .card__front,
.card:hover .card__back { border-color: var(--text); }

/* Corner accent marks — top-left and bottom-right diagonal */
.card__front::before,
.card__back::before {
  content: ''; position: absolute;
  top: -1px; left: -1px;
  width: 14px; height: 14px;
  border-top: 2px solid var(--accent);
  border-left: 2px solid var(--accent);
  pointer-events: none;
}
.card__front::after,
.card__back::after {
  content: ''; position: absolute;
  bottom: -1px; right: -1px;
  width: 14px; height: 14px;
  border-bottom: 2px solid var(--accent);
  border-right: 2px solid var(--accent);
  pointer-events: none;
}

/* ── Front face ───────── */
.card__header {
  display: flex; align-items: flex-start;
  justify-content: space-between; gap: .75rem;
  padding: 1.1rem 1.25rem .9rem;
  border-bottom: 1px dashed var(--border);
  flex-shrink: 0;
}
.card__tags { display: flex; gap: .35rem; flex-wrap: wrap; }
.card__tags span {
  font-family: 'Courier New', monospace;
  font-size: .65rem; font-weight: 700; letter-spacing: .04em;
  padding: .15rem .5rem;
  color: var(--accent); border: 1px solid var(--accent);
  background: transparent;
}
.card__period {
  font-family: 'Courier New', monospace;
  font-size: .65rem; color: var(--muted); white-space: nowrap;
  flex-shrink: 0; padding-top: .1rem;
}

.card__body {
  padding: 1.1rem 1.25rem;
  display: flex; flex-direction: column;
  flex: 1; overflow: hidden;
}
.card__title-block { margin-bottom: .6rem; }
.card__company {
  font-family: 'Courier New', monospace;
  font-size: 1rem; font-weight: 700; color: var(--text);
  line-height: 1.2; margin-bottom: .15rem;
}
.card__role {
  font-family: 'Courier New', monospace;
  font-size: .72rem; color: var(--muted); font-weight: 400;
}
.card__body p {
  color: var(--muted); font-size: .82rem; line-height: 1.6;
  flex: 1;
}

.card__foot {
  display: flex; align-items: center;
  justify-content: space-between; gap: 1rem;
  margin-top: .75rem;
}
.card__link {
  font-family: 'Courier New', monospace;
  color: var(--accent); text-decoration: none;
  font-size: .72rem; font-weight: 700;
  letter-spacing: .06em; text-transform: uppercase;
}
.card__link:hover { text-decoration: underline; }
.card__hint {
  font-family: 'Courier New', monospace;
  font-size: .65rem; color: var(--muted);
  letter-spacing: .04em; pointer-events: none;
}

/* ── Back face ───────── */
.card__back-header {
  display: flex; align-items: flex-start;
  justify-content: space-between; gap: .75rem;
  padding: .9rem 1.25rem;
  border-bottom: 1px dashed var(--border);
  flex-shrink: 0;
}
.card__back-header .card__hint {
  font-size: .65rem; font-weight: 400;
  flex-shrink: 0; padding-top: .1rem;
}

.card__bullets {
  list-style: none;
  padding: .9rem 1.25rem;
  overflow-y: auto; flex: 1;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
.card__bullets li {
  font-size: .78rem; color: var(--muted); line-height: 1.55;
  padding: .3rem 0;
  border-bottom: 1px solid rgba(0,0,0,.05);
}
.card__bullets li::before {
  content: '— ';
  color: var(--accent); font-family: 'Courier New', monospace;
}

/* ── Skills ───────────────────────────────────────────────── */
.skills__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; }

.skill-group h4 {
  font-family: 'Courier New', monospace;
  font-size: .72rem; font-weight: 600; color: var(--muted);
  text-transform: uppercase; letter-spacing: .12em; margin-bottom: 1.5rem;
}
.skill-bar { margin-bottom: 1.25rem; }
.skill-bar__header { display: flex; justify-content: space-between; margin-bottom: .4rem; }
.skill-bar__header span {
  font-family: 'Courier New', monospace; font-size: .8rem; color: var(--text);
}
.skill-bar__header span:last-child { color: var(--muted); }
.bar { height: 2px; background: var(--surface); overflow: hidden; }
.bar__fill { height: 100%; width: 0; background: var(--accent); transition: width 1s ease; }

@media (max-width: 640px) { .skills__grid { grid-template-columns: 1fr; } }

/* ── Contact ──────────────────────────────────────────────── */
.contact__sub { color: var(--muted); margin-bottom: 2rem; font-size: .95rem; }

.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 540px) { .form__row { grid-template-columns: 1fr; } }

.form__group { display: flex; flex-direction: column; margin-bottom: 1rem; }
.form__group label {
  font-family: 'Courier New', monospace;
  font-size: .68rem; font-weight: 600; margin-bottom: .4rem;
  color: var(--muted); text-transform: uppercase; letter-spacing: .1em;
}
.form__group input,
.form__group textarea {
  background: var(--bg);
  border: 1px solid var(--border); border-radius: 0;
  padding: .75rem 1rem; color: var(--text);
  font-size: .9rem; font-family: inherit;
  transition: border-color var(--tr); resize: vertical;
}
.form__group input:focus,
.form__group textarea:focus { outline: none; border-color: var(--accent); }
.form__group input.error,
.form__group textarea.error { border-color: var(--accent); }

.form__success {
  font-family: 'Courier New', monospace;
  color: var(--accent); font-weight: 600; text-align: center;
  margin-top: 1rem; font-size: .875rem;
}

/* ── Footer ───────────────────────────────────────────────── */
.footer {
  padding: 2rem; text-align: center;
  border-top: 1px solid var(--border);
  font-family: 'Courier New', monospace;
  color: var(--muted); font-size: .78rem; letter-spacing: .04em;
}
.footer__links { display: flex; gap: 1.5rem; justify-content: center; margin-bottom: .5rem; }
.footer__links a { color: var(--muted); text-decoration: none; transition: color var(--tr); }
.footer__links a:hover { color: var(--accent); }

/* ── Marker highlight ────────────────────────────────────── */
/* Red marker — like a red pencil annotation on a blueprint   */
strong {
  font-weight: 600;
  color: var(--text);
  background: linear-gradient(
    104deg,
    rgba(214,40,40, 0)    0%,
    rgba(214,40,40, .12)  2.5%,
    rgba(214,40,40, .20)  15%,
    rgba(214,40,40, .16)  48%,
    rgba(214,40,40, .20)  71%,
    rgba(214,40,40, .10)  97%,
    rgba(214,40,40, 0)   100%
  );
  padding: .08em .3em;
  margin: 0 -.12em;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}

/* Yellow marker — optional second level (e.g. <mark>) */
mark {
  color: inherit;
  background: linear-gradient(
    104deg,
    rgba(245,195,0, 0)    0%,
    rgba(245,195,0, .22)  3%,
    rgba(245,195,0, .38)  18%,
    rgba(245,195,0, .32)  50%,
    rgba(245,195,0, .36)  78%,
    rgba(245,195,0, .16)  97%,
    rgba(245,195,0, 0)   100%
  );
  padding: .08em .3em;
  margin: 0 -.12em;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}

/* ── Reveal animation ─────────────────────────────────────── */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .5s ease, transform .5s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }