/* ---------- tokens ---------- */
:root{
  /* drafting (light) — default theme */
  --bg: #f6f2e7;
  --bg-rgb: 246,242,231;
  --bg-alt: #efe8d5;
  --ink: #221f19;
  --ink-rgb: 34,31,25;
  --ink-dim: #5c5648;
  --ink-faint: #948c78;
  --line: #ddd4bd;
  --line-bright: #b8ac8a;
  --accent: #3f6b2c;
  --accent-rgb: 63,107,44;
  --accent-bright: #79ad5f;
  --accent-soft: rgba(63,107,44,0.08);
  --amber: #b5791f;
  --card: #fffdf8;
  --radius: 4px;
  --max: 1100px;
  --font-display: 'Fraunces', Georgia, serif;
  --font-mono: 'Oswald', 'Arial Narrow', sans-serif;
}

[data-theme="dark"]{
  --bg: #0a0e14;
  --bg-rgb: 10,14,20;
  --bg-alt: #0d1219;
  --ink: #e8ecf1;
  --ink-rgb: 232,236,241;
  --ink-dim: #8b97a8;
  --ink-faint: #4d5867;
  --line: #1e2733;
  --line-bright: #3a4a5c;
  --accent: #79ad5f;
  --accent-rgb: 121,173,95;
  --accent-bright: #79ad5f;
  --accent-soft: rgba(121,173,95,0.12);
  --amber: #f5b942;
  --card: #0f1520;
}

*{ box-sizing: border-box; }
*, *::before, *::after{ transition: background-color .25s ease, border-color .25s ease, color .25s ease; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.wrap{ max-width: var(--max); margin: 0 auto; padding: 0 28px; }
.mono{ font-family: var(--font-mono); }
.dim{ color: var(--ink-dim); }
.accent{ color: var(--accent); }

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

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

/* ---------- drawing sheet frame ---------- */
.sheet{ position: relative; margin: 16px; border: 1px solid var(--line-bright); }
.sheet::before{ content:""; position:absolute; inset: 7px; border: 1px solid var(--line); pointer-events: none; z-index: 1; }
.tick{ position: absolute; width: 14px; height: 14px; z-index: 2; pointer-events: none; }
.tick.tl{ top: 7px; left: 7px; border-top: 1px solid var(--line-bright); border-left: 1px solid var(--line-bright); }
.tick.tr{ top: 7px; right: 7px; border-top: 1px solid var(--line-bright); border-right: 1px solid var(--line-bright); }
.tick.bl{ bottom: 7px; left: 7px; border-bottom: 1px solid var(--line-bright); border-left: 1px solid var(--line-bright); }
.tick.br{ bottom: 7px; right: 7px; border-bottom: 1px solid var(--line-bright); border-right: 1px solid var(--line-bright); }

/* ---------- header ---------- */
.site-header{
  position: sticky; top: 0; z-index: 50;
  background: rgba(var(--bg-rgb), 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner{ display:flex; align-items:center; justify-content: space-between; height: 64px; }
.logo{
  font-family: var(--font-mono); font-weight: 600; font-size: 1.05rem;
  letter-spacing: 0.06em; text-transform: uppercase;
}
.site-nav{ display:flex; gap: 26px; align-items:center; }
.site-nav a{
  color: var(--ink-dim); transition: color .15s ease;
  font-family: var(--font-mono); font-size: 0.8rem; letter-spacing: 0.05em; text-transform: uppercase;
}
.site-nav a:hover{ color: var(--ink); }
.nav-cta{
  border: 1px solid var(--line-bright); padding: 7px 14px; border-radius: var(--radius);
  color: var(--ink) !important;
}
.nav-cta:hover{ border-color: var(--accent); color: var(--accent) !important; }
.theme-toggle{ display:flex; border: 1px solid var(--line-bright); flex-shrink: 0; }
.theme-btn{
  font-family: var(--font-mono); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.05em;
  padding: 8px 12px; background: none; border: none; cursor: pointer; color: var(--ink-dim);
}
.theme-btn:hover{ color: var(--ink); }
.theme-btn + .theme-btn{ border-left: 1px solid var(--line-bright); }
.theme-btn[aria-pressed="true"]{ background: var(--accent-bright); color: #10240b; font-weight: 600; }
.theme-btn[aria-pressed="true"]:hover{ color: #10240b; }
.nav-toggle{ display:none; flex-direction:column; gap:5px; background:none; border:none; cursor:pointer; padding: 8px; }
.nav-toggle span{ width: 22px; height: 2px; background: var(--ink); display:block; }

/* ---------- hero ---------- */
.hero{ position: relative; z-index: 1; padding: 96px 28px 60px; }
.label{
  color: var(--accent); font-size: 0.82rem; margin-bottom: 20px;
  text-transform: uppercase; letter-spacing: 0.1em;
}
.hero h1{ font-size: clamp(2.6rem, 6vw, 4.4rem); line-height: 1.05; font-weight: 600; }
.hero-sub{
  max-width: 620px; font-size: 1.15rem; color: var(--ink-dim); margin: 24px 0 28px;
}
.tag-row{ display:flex; flex-wrap: wrap; gap: 8px; margin-bottom: 34px; }
.tag{
  font-family: var(--font-mono); font-size: 0.75rem; color: var(--accent);
  text-transform: uppercase; letter-spacing: 0.04em;
  border: 1px solid var(--line-bright); background: var(--accent-soft);
  padding: 7px 12px; white-space: nowrap;
}
.hero-actions{ display:flex; flex-wrap: wrap; gap: 14px; margin-bottom: 44px; }
.btn{
  font-family: var(--font-mono); font-size: 0.82rem; padding: 12px 22px; border-radius: var(--radius);
  border: 1px solid var(--line-bright); transition: all .15s ease; display:inline-flex; align-items:center; gap:8px;
  text-transform: uppercase; letter-spacing: 0.05em;
}
.btn-primary{ background: var(--accent-bright); color: #10240b; border-color: var(--accent-bright); font-weight: 600; }
.btn-primary:hover{ background: #669350; }
.btn-outline{ color: var(--ink); }
.btn-outline:hover{ border-color: var(--accent); color: var(--accent); }
.hero-meta{ display:flex; flex-wrap: wrap; gap: 10px; color: var(--ink-faint); font-size: 0.82rem; }
.hero-meta .dot{ color: var(--ink-faint); }

/* title block — hero credential strip, drafting title-block convention */
.title-block{
  display: grid; grid-template-columns: repeat(3, auto); width: max-content; max-width: 100%;
  border: 1px solid var(--line-bright); text-transform: uppercase;
}
.title-block div{ padding: 9px 16px; border-right: 1px solid var(--line); border-top: 1px solid var(--line); }
.title-block div:nth-child(-n+3){ border-top: none; }
.title-block div:nth-child(3n){ border-right: none; }
.title-block .label{
  display:block; font-family: var(--font-mono); font-size: 0.6rem; letter-spacing: 0.06em;
  color: var(--ink-faint); margin-bottom: 3px;
}
.title-block .val{ font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.03em; color: var(--ink); }

/* ---------- sections ---------- */
.section{ position: relative; z-index: 1; padding: 76px 0; border-top: 1px solid var(--line); }

/* sheet-number section marker, replaces "// 0N —" comment label */
.sheet-num{ display:flex; align-items:center; gap: 12px; margin-bottom: 12px; }
.sheet-num .box{
  font-family: var(--font-mono); font-weight: 600; font-size: 0.8rem;
  border: 1px solid var(--accent); color: var(--accent);
  width: 28px; height: 28px; display:flex; align-items:center; justify-content:center; flex-shrink: 0;
}
.sheet-num .rule{ flex:1; height: 1px; background: var(--line-bright); position: relative; }
.sheet-num .rule::after{ content:""; position:absolute; right:0; top:-3px; width:1px; height:7px; background: var(--line-bright); }
.sheet-num .label{
  font-family: var(--font-mono); font-size: 0.82rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-faint);
}
.section-hint{ color: var(--ink-faint); font-size: 0.9rem; margin: 0 0 32px; }

/* about */
.about-grid{ display:grid; grid-template-columns: auto 1.4fr 1fr; gap: 40px; align-items: start; }
.about-photo{
  width: 240px; border: 1px solid var(--line-bright); overflow: hidden;
}
.about-photo img{ display:block; width: 100%; height: 100%; object-fit: cover; aspect-ratio: 4 / 5; filter: grayscale(0.15) contrast(1.02); }
.about-text{ font-size: 1.08rem; color: var(--ink-dim); max-width: 560px; }
.status-card{
  border: 1px solid var(--line); background: var(--card);
  padding: 22px; border-left: 3px solid var(--accent);
}
.status-kicker{
  color: var(--accent); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.08em;
  margin: 0 0 10px; display: flex; align-items: center; gap: 8px; font-family: var(--font-mono);
}
.status-dot{
  width: 7px; height: 7px; border-radius: 50%; background: var(--accent);
  box-shadow: 0 0 0 0 rgba(var(--accent-rgb), 0.55);
  animation: pulse-dot 2.2s ease-out infinite;
}
@keyframes pulse-dot{
  0%{ box-shadow: 0 0 0 0 rgba(var(--accent-rgb), 0.5); }
  70%{ box-shadow: 0 0 0 8px rgba(var(--accent-rgb), 0); }
  100%{ box-shadow: 0 0 0 0 rgba(var(--accent-rgb), 0); }
}

/* projects (modal detail content) */
.project{
  display:grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items:center;
  padding: 40px 0; border-bottom: 1px solid var(--line);
}
.project:first-of-type{ padding-top: 0; }
.project.reverse .project-visual{ order: 2; }
.project.reverse .project-copy{ order: 1; }
.project-meta{ color: var(--accent); font-size: 0.78rem; margin: 0 0 10px; font-family: var(--font-mono); }
.project h3{ font-size: 1.6rem; margin-bottom: 10px; }
.project h3 .dim{ font-size: 1rem; font-weight: 400; font-family: var(--font-display); }
.project-desc{ color: var(--ink-dim); margin: 0 0 16px; }
.project-list{ margin: 0 0 20px; padding-left: 20px; color: var(--ink-dim); }
.project-list li{ margin-bottom: 8px; }
.project-list li::marker{ color: var(--accent); }
.chip-row{ display:flex; flex-wrap: wrap; gap: 8px; }
.chip{
  font-family: var(--font-mono); font-size: 0.88rem; color: var(--ink-dim);
  text-transform: uppercase; letter-spacing: 0.03em;
  border: 1px solid var(--line-bright); padding: 6px 12px;
}
a.chip{ transition: border-color .15s ease, color .15s ease; }
a.chip:hover{ border-color: var(--accent); color: var(--accent); }
.project-visual{
  position: relative; overflow: hidden;
  background: var(--bg-alt); border: 1px solid var(--line-bright);
  height: 420px;
}
.carousel-track{
  display: flex; height: 100%;
  transition: transform .45s cubic-bezier(.65,0,.35,1);
}
.carousel-slide{
  flex: 0 0 100%; height: 100%; padding: 14px;
  display: flex; align-items: center; justify-content: center;
}
.carousel-slide img{
  width: 100%; height: 100%; object-fit: contain;
  display: block;
}
.carousel-btn{
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 34px; height: 34px; border-radius: 50%;
  background: rgba(var(--bg-rgb), 0.85); border: 1px solid var(--line-bright); color: var(--ink);
  font-family: var(--font-mono); font-size: 1.1rem; line-height: 1; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: border-color .15s ease, color .15s ease;
  z-index: 2;
}
.carousel-btn:hover{ border-color: var(--accent); color: var(--accent); }
.carousel-btn.prev{ left: 10px; }
.carousel-btn.next{ right: 10px; }
.carousel-dots{
  position: absolute; bottom: 10px; left: 0; right: 0;
  display: flex; justify-content: center; gap: 7px; z-index: 2;
}
.carousel-dots .dot{
  width: 7px; height: 7px; border-radius: 50%; padding: 0;
  background: rgba(var(--ink-rgb), 0.25); border: 1px solid transparent; cursor: pointer;
  transition: background .15s ease, transform .15s ease;
}
.carousel-dots .dot.active{ background: var(--accent); transform: scale(1.2); }

.project-concept{ padding: 32px 0 0; max-width: 720px; }
.project-concept h4{ font-size: 1.15rem; margin: 6px 0 10px; }
.project-concept p{ color: var(--ink-dim); margin: 0 0 14px; }
.project-concept .project-list{ margin-bottom: 16px; }

/* project gallery — hairline contact-sheet grid */
.project-gallery{ display:grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line-bright); border: 1px solid var(--line-bright); }
.project-card:last-child:nth-child(odd){ grid-column: 1 / -1; }
.project-card:last-child:nth-child(odd) .project-card-media{ aspect-ratio: 32 / 10; }
.project-card{
  width: 100%; text-align: left; cursor: pointer; appearance: none;
  background: var(--bg); border: none; padding: 0; margin: 0;
  display: flex; flex-direction: column;
  font-family: var(--font-display); color: inherit;
}
.project-card-media{ display:block; aspect-ratio: 16 / 10; overflow: hidden; background: var(--bg-alt); position: relative; }
.project-card-media img{
  width: 100%; height: 100%; object-fit: cover; display: block;
  filter: grayscale(0.15) contrast(1.02);
  transition: filter .35s ease, transform .5s cubic-bezier(.25,.8,.25,1);
}
.project-card:hover .project-card-media img{ filter: grayscale(0.05) contrast(1.02); transform: scale(1.03); }
.project-card-media::after{
  content:""; position:absolute; inset:0;
  background: linear-gradient(160deg, transparent 55%, rgba(var(--accent-rgb), 0.16));
  opacity: 0; transition: opacity .3s ease;
}
.project-card:hover .project-card-media::after{ opacity: 1; }
.project-card-body{ display:flex; flex-direction: column; gap: 9px; padding: 22px 22px 6px; }
.project-card-kicker{
  color: var(--accent); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.08em;
  font-family: var(--font-mono);
}
.project-card-title{ font-size: 1.18rem; font-weight: 600; line-height: 1.3; }
.project-card-hook{ color: var(--ink-dim); font-size: 0.92rem; line-height: 1.55; }
.project-card-body .chip-row{ margin-top: 4px; }
.project-card-cta{
  display:flex; align-items:center; gap: 10px; margin-top: auto;
  padding: 18px 22px 22px; font-family: var(--font-mono); font-size: 0.75rem; color: var(--accent);
  text-transform: uppercase; letter-spacing: 0.06em;
}
.project-card-cta::after{ content:""; flex:1; height:1px; background: var(--line-bright); }
.project-card-cta .arrow{ display:inline-block; transition: transform .2s ease; }
.project-card:hover .project-card-cta .arrow{ transform: translateX(4px); }
.project-card-concept .project-card-body{ padding-top: 26px; }

/* project modal */
body.modal-open{ overflow: hidden; }
.project-modal-overlay{
  position: fixed; inset: 0; z-index: 100;
  display:flex; align-items:center; justify-content:center; padding: 24px;
  background: rgba(30,27,20,0.55); backdrop-filter: blur(4px);
  opacity: 0; pointer-events: none; transition: opacity .25s ease;
}
.project-modal-overlay.open{ opacity: 1; pointer-events: auto; }
.project-modal{
  position: relative; width: min(880px, 100%); max-height: 86vh; overflow-y: auto;
  background: var(--card); border: 1px solid var(--line-bright);
  padding: 44px; box-shadow: 0 30px 60px rgba(20,17,10,0.35);
  transform: scale(0.96) translateY(8px); opacity: 0;
  transition: transform .3s cubic-bezier(.2,.8,.2,1), opacity .25s ease;
}
.project-modal-overlay.open .project-modal{ transform: scale(1) translateY(0); opacity: 1; }
.project-modal-close{
  position: absolute; top: 16px; right: 16px; width: 36px; height: 36px; border-radius: 50%;
  background: var(--bg); border: 1px solid var(--line-bright); color: var(--ink); cursor: pointer;
  font-size: 1rem; display:flex; align-items:center; justify-content:center;
  transition: border-color .15s ease, color .15s ease; z-index: 2;
}
.project-modal-close:hover{ border-color: var(--accent); color: var(--accent); }
.project-modal-content .project{ grid-template-columns: 1fr; border-bottom: none; padding: 0; }
.project-modal-content .project-visual{ order: -1; margin-bottom: 4px; }
.project-modal-content .project-concept{ padding: 0; max-width: none; }

/* timeline */
.timeline{ display:flex; flex-direction: column; }
.timeline-item{
  display:grid; grid-template-columns: 190px 1fr; gap: 32px;
  padding: 28px 0; border-bottom: 1px solid var(--line);
}
.timeline-item:first-child{ padding-top: 0; }
.timeline-date{ color: var(--ink-faint); font-size: 0.8rem; padding-top: 4px; font-family: var(--font-mono); }
.timeline-body h4{ font-size: 1.15rem; margin-bottom: 4px; }
.timeline-org{ color: var(--accent); font-size: 0.98rem; margin: 0 0 12px; font-family: var(--font-mono); }
.timeline-body ul{ margin: 0; padding-left: 20px; color: var(--ink-dim); }
.timeline-body li{ margin-bottom: 6px; }
.timeline-body li::marker{ color: var(--ink-faint); }

/* skills */
.skills-grid{ display:grid; grid-template-columns: repeat(2, 1fr); gap: 32px 48px; }
.skill-kicker{
  color: var(--ink-faint); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.08em;
  margin: 0 0 14px; font-family: var(--font-mono);
}

/* education */
.edu-grid{ display:grid; grid-template-columns: 1.3fr 1fr; gap: 48px; }
.edu-main h4{ font-size: 1.3rem; margin-bottom: 8px; }
.edu-line{ color: var(--ink-dim); margin-top: 16px; }
.edu-side{ display:flex; flex-direction: column; gap: 20px; }
.edu-card{ border: 1px solid var(--line); background: var(--card); padding: 20px; }
.plain-list{ margin: 0; padding-left: 18px; color: var(--ink-dim); font-size: 0.92rem; }
.plain-list li{ margin-bottom: 8px; }
.plain-list li::marker{ color: var(--accent); }

/* contact */
.contact-section h2{ font-size: clamp(2rem, 4vw, 2.8rem); margin-bottom: 14px; }
.contact-section p{ color: var(--ink-dim); max-width: 520px; margin-bottom: 28px; }

/* footer */
.site-footer{ border-top: 1px solid var(--line); padding: 24px 0; position: relative; z-index: 1; }
.footer-inner{ display:flex; justify-content: space-between; font-size: 0.76rem; color: var(--ink-faint); font-family: var(--font-mono); }

/* ---------- reveal animation ---------- */
.reveal{ opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in{ opacity: 1; transform: translateY(0); }

/* ---------- responsive ---------- */
@media (max-width: 860px){
  .about-grid, .edu-grid{ grid-template-columns: 1fr; }
  .project, .project.reverse{ grid-template-columns: 1fr; }
  .project.reverse .project-visual, .project.reverse .project-copy{ order: initial; }
  .project-visual{ height: 320px; }
  .project-gallery{ grid-template-columns: 1fr; }
  .project-modal{ padding: 28px; }
  .timeline-item{ grid-template-columns: 1fr; gap: 8px; }
  .skills-grid{ grid-template-columns: 1fr; }
  .title-block{ grid-template-columns: repeat(2, auto); }
  .title-block div:nth-child(-n+3){ border-top: 1px solid var(--line); }
  .title-block div:nth-child(2){ border-top: none; }
  .title-block div:nth-child(1){ border-top: none; }
  .title-block div:nth-child(3n){ border-right: 1px solid var(--line); }
  .title-block div:nth-child(2n){ border-right: none; }
}

@media (max-width: 940px){
  .site-nav{
    position: absolute; top: 64px; left: 0; right: 0;
    background: var(--bg); border-bottom: 1px solid var(--line);
    flex-direction: column; align-items: flex-start; gap: 0;
    max-height: 0; overflow: hidden; transition: max-height .25s ease;
  }
  .site-nav.open{ max-height: 400px; box-shadow: 0 12px 24px rgba(20,17,10,0.15); }
  .site-nav a{ padding: 16px 28px; width: 100%; border-bottom: 1px solid var(--line); }
  .nav-cta{ border: none; margin: 8px 28px; }
  .nav-toggle{ display:flex; }
  .header-inner{ gap: 10px; }
}