/* ============================================================ tokens */

:root {
    --ink:        #121A21;   /* graphite, near-black with a blue cast */
    --ink-soft:   #46545F;   /* secondary text */
    --paper:      #EDF1F1;   /* cool paper */
    --card:       #FFFFFF;
    --rule:       #C6D0D2;   /* grid + hairlines */
    --pen:        #B8352C;   /* red pen — annotation only, never decoration */
  
    --display: "Archivo", system-ui, sans-serif;
    --body:    "Source Serif 4", Georgia, serif;
    --mono:    "IBM Plex Mono", ui-monospace, monospace;
    --hand:    "Caveat", cursive;
  
    --measure: 34rem;
    --gutter: clamp(1.25rem, 4vw, 3rem);
  }
  
  *, *::before, *::after { box-sizing: border-box; }
  
  html { -webkit-text-size-adjust: 100%; }
  
  body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--body);
    font-size: clamp(1.0625rem, 0.5vw + 0.95rem, 1.1875rem);
    line-height: 1.62;
    -webkit-font-smoothing: antialiased;
  }
  
  .wrap {
    max-width: 68rem;
    margin-inline: auto;
    padding-inline: var(--gutter);
  }
  
  .mono { font-family: var(--mono); }
  
  a { color: var(--ink); text-decoration-thickness: 1px; text-underline-offset: 3px; }
  
  .skip {
    position: absolute; left: -9999px;
    background: var(--ink); color: var(--paper);
    padding: .6rem 1rem;
  }
  .skip:focus { left: 1rem; top: 1rem; z-index: 10; }
  
  :focus-visible { outline: 2px solid var(--pen); outline-offset: 3px; }
  
  /* ============================================================ masthead */
  
  .masthead {
    border-bottom: 1px solid var(--rule);
    background: var(--paper);
  }
  
  .masthead-inner {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem 2rem;
    align-items: baseline;
    justify-content: space-between;
    padding-block: 1.1rem;
  }
  
  .wordmark { text-decoration: none; display: flex; align-items: baseline; gap: .6rem; flex-wrap: wrap; }
  
  .wordmark-name {
    font-family: var(--display);
    font-weight: 800;
    letter-spacing: -0.025em;
    font-size: 1.0625rem;
  }
  
  .wordmark-role {
    font-family: var(--mono);
    font-size: .75rem;
    color: var(--ink-soft);
    text-transform: uppercase;
    letter-spacing: .08em;
  }
  
  .masthead nav { display: flex; gap: 1.5rem; flex-wrap: wrap; }
  
  .masthead nav a {
    font-family: var(--mono);
    font-size: .8125rem;
    letter-spacing: .02em;
    text-decoration: none;
    padding-bottom: 2px;
    border-bottom: 1.5px solid transparent;
  }
  .masthead nav a:hover { border-bottom-color: var(--rule); }
  .masthead nav a[aria-current="page"] { border-bottom-color: var(--pen); }
  
  /* ============================================================ hero */
  
  .hero {
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid var(--rule);
  }
  
  /* engineering-pad grid, hero only */
  .hero::before {
    content: "";
    position: absolute; inset: 0;
    background-image:
      linear-gradient(to right, var(--rule) 1px, transparent 1px),
      linear-gradient(to bottom, var(--rule) 1px, transparent 1px);
    background-size: 1.5rem 1.5rem;
    opacity: .38;
    mask-image: linear-gradient(to bottom, #000 0%, transparent 78%);
    -webkit-mask-image: linear-gradient(to bottom, #000 0%, transparent 78%);
    pointer-events: none;
  }
  
  .hero-inner {
    position: relative;
    padding-block: clamp(3.5rem, 8vw, 6.5rem) clamp(3rem, 6vw, 5rem);
    display: grid;
    gap: clamp(2.5rem, 5vw, 4rem);
    grid-template-columns: 1fr;
  }
  
  @media (min-width: 60rem) {
    .hero-inner { grid-template-columns: 1.05fr 1fr; align-items: center; }
  }
  
  .eyebrow {
    font-family: var(--mono);
    font-size: .75rem;
    text-transform: uppercase;
    letter-spacing: .14em;
    color: var(--ink-soft);
    margin: 0 0 1.4rem;
  }
  
  .hero h1 {
    font-family: var(--display);
    font-weight: 800;
    font-size: clamp(2.1rem, 5.2vw, 3.4rem);
    line-height: 1.03;
    letter-spacing: -0.035em;
    margin: 0 0 1.3rem;
    text-wrap: balance;
  }
  
  .hero .lede {
    margin: 0 0 2rem;
    max-width: var(--measure);
    font-size: 1.0625em;
    color: var(--ink-soft);
  }
  
  /* ============================================================ the artifact */
  
  .artifact {
    background: var(--card);
    border: 1px solid var(--rule);
    border-radius: 2px;
    box-shadow: 0 1px 0 var(--rule), 0 18px 40px -28px rgba(18, 26, 33, .5);
    padding: 1.6rem 1.5rem 1.4rem;
  }
  
  .artifact-head {
    font-family: var(--mono);
    font-size: .7rem;
    text-transform: uppercase;
    letter-spacing: .12em;
    color: var(--ink-soft);
    padding-bottom: .9rem;
    margin-bottom: 1.2rem;
    border-bottom: 1px solid var(--rule);
  }
  
  .work { font-family: var(--mono); font-size: .9375rem; line-height: 2.1; margin: 0; }
  .work div { white-space: nowrap; overflow-x: auto; }
  
  .work .given { color: var(--ink-soft); }
  
  .slip {
    position: relative;
    color: var(--pen);
  }
  .slip::after {
    content: "";
    position: absolute;
    left: -2px; right: -2px; top: 52%;
    height: 1.5px;
    background: var(--pen);
    transform: rotate(-1.2deg);
  }
  
  .note {
    font-family: var(--hand);
    font-size: 1.3rem;
    line-height: 1.25;
    color: var(--pen);
    margin: 1.1rem 0 0;
    padding-left: 1.4rem;
    border-left: 2px solid var(--pen);
  }
  
  .artifact-foot {
    margin: 1.4rem 0 0;
    padding-top: 1rem;
    border-top: 1px solid var(--rule);
    font-size: .875rem;
    color: var(--ink-soft);
  }
  
  /* ============================================================ buttons */
  
  .actions { display: flex; flex-wrap: wrap; gap: .75rem; }
  
  .btn {
    display: inline-block;
    font-family: var(--mono);
    font-size: .8125rem;
    letter-spacing: .04em;
    text-transform: uppercase;
    text-decoration: none;
    padding: .8rem 1.4rem;
    border: 1.5px solid var(--ink);
    border-radius: 2px;
    transition: background-color .15s, color .15s;
  }
  
  .btn-solid { background: var(--ink); color: var(--paper); }
  .btn-solid:hover { background: var(--pen); border-color: var(--pen); }
  .btn-line:hover { background: var(--ink); color: var(--paper); }
  
  /* ============================================================ sections */
  
  .band { padding-block: clamp(3.25rem, 7vw, 5.5rem); }
  .band + .band { border-top: 1px solid var(--rule); }
  
  .band-head { max-width: var(--measure); margin: 0 0 2.75rem; }
  
  .band-head h2 {
    font-family: var(--display);
    font-weight: 800;
    font-size: clamp(1.5rem, 3vw, 2.05rem);
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin: 0 0 .85rem;
    text-wrap: balance;
  }
  
  .band-head p { margin: 0; color: var(--ink-soft); }
  
  .prose { max-width: var(--measure); }
  .prose p { margin: 0 0 1.1rem; }
  .prose p:last-child { margin-bottom: 0; }
  .prose h3 {
    font-family: var(--display);
    font-weight: 600;
    font-size: 1.125rem;
    letter-spacing: -0.015em;
    margin: 2.25rem 0 .7rem;
  }
  
  /* ============================================================ course grid */
  
  .grid {
    display: grid;
    gap: 1px;
    background: var(--rule);
    border: 1px solid var(--rule);
    grid-template-columns: 1fr;
  }
  @media (min-width: 44rem) { .grid { grid-template-columns: 1fr 1fr; } }
  @media (min-width: 66rem) { .grid { grid-template-columns: repeat(3, 1fr); } }
  
  .cell {
    background: var(--paper);
    padding: 1.6rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: .6rem;
  }
  
  .cell-tag {
    font-family: var(--mono);
    font-size: .6875rem;
    text-transform: uppercase;
    letter-spacing: .12em;
    color: var(--ink-soft);
  }
  
  .cell h3 {
    font-family: var(--display);
    font-weight: 600;
    font-size: 1.0625rem;
    letter-spacing: -0.015em;
    margin: 0;
  }
  
  .cell p { margin: 0; font-size: .9375rem; color: var(--ink-soft); line-height: 1.55; }
  
  .cell a { font-family: var(--mono); font-size: .75rem; letter-spacing: .04em; margin-top: auto; padding-top: .5rem; }
  
  /* ============================================================ facts list */
  
  .facts { list-style: none; margin: 0; padding: 0; max-width: 46rem; }
  
  .facts li {
    display: grid;
    gap: .2rem 2rem;
    padding: 1.15rem 0;
    border-top: 1px solid var(--rule);
  }
  .facts li:last-child { border-bottom: 1px solid var(--rule); }
  
  @media (min-width: 44rem) {
    .facts li { grid-template-columns: 11rem 1fr; align-items: baseline; }
    /* keep every value in column two so multiple entries stack under each other */
    .facts .v { grid-column: 2; }
  }
    
  .facts .v + .v { margin-top: .35rem; }
  
  .facts dt, .facts .k {
    font-family: var(--mono);
    font-size: .75rem;
    text-transform: uppercase;
    letter-spacing: .1em;
    color: var(--ink-soft);
  }
  
  .facts .v { margin: 0; }
  
  /* ============================================================ callout */
  
  .callout {
    border-left: 2px solid var(--pen);
    padding: .2rem 0 .2rem 1.35rem;
    margin: 2rem 0;
    max-width: var(--measure);
  }
  .callout p { margin: 0; }
  
  /* ============================================================ footer */
  
  .foot {
    border-top: 1px solid var(--rule);
    padding-block: 2.5rem;
    margin-top: 0;
  }
  
  .foot-inner {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem 3rem;
    justify-content: space-between;
    align-items: flex-start;
  }
  
  .foot-name { font-family: var(--display); font-weight: 600; margin: 0 0 .35rem; }
  .foot-meta { font-size: .75rem; color: var(--ink-soft); margin: 0; max-width: 26rem; line-height: 1.7; }
  
  .foot-contact { display: flex; flex-direction: column; gap: .35rem; font-family: var(--mono); font-size: .8125rem; }
  
  @media (prefers-reduced-motion: reduce) {
    * { transition: none !important; animation: none !important; }
  }