/* Fenlux Ltd — paper stylesheet */
:root {
  --desk: #e9e2d3;
  --paper: #fbf8f1;
  --paper-edge: #efe8d8;
  --ink: #1f1b16;
  --ink-soft: #4a4339;
  --ink-faint: #7b7266;
  --rule: #d9cfbb;
  --rule-blue: rgba(96, 132, 176, 0.16);
  --margin-red: rgba(178, 58, 42, 0.35);
  --accent: #b23a2a;
  --accent-ink: #8e2c1f;
  --highlight: rgba(244, 214, 120, 0.55);
  --shadow: 0 1px 1px rgba(60, 45, 20, .08), 0 8px 24px rgba(60, 45, 20, .12), 0 24px 60px rgba(60, 45, 20, .10);
  --serif: "Newsreader", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --desk: #1b1915;
    --paper: #262320;
    --paper-edge: #2e2a25;
    --ink: #ece4d4;
    --ink-soft: #c9bfae;
    --ink-faint: #968c7c;
    --rule: #443e35;
    --rule-blue: rgba(140, 170, 210, 0.07);
    --margin-red: rgba(220, 110, 90, 0.30);
    --accent: #e0846f;
    --accent-ink: #f0a08c;
    --highlight: rgba(200, 160, 60, 0.28);
    --shadow: 0 1px 1px rgba(0,0,0,.3), 0 10px 30px rgba(0,0,0,.35);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background-color: var(--desk);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0.4 0 0 0 0 0.33 0 0 0 0 0.2 0 0 0 0.07 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  color: var(--ink);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.65;
  font-optical-sizing: auto;
}
a { color: var(--accent-ink); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--accent); text-decoration-thickness: 2px; }
::selection { background: var(--highlight); }

/* ---------- top bar ---------- */
.masthead {
  max-width: 1040px; margin: 0 auto; padding: 28px 24px 0;
  display: flex; align-items: baseline; justify-content: space-between; gap: 16px; flex-wrap: wrap;
}
.brand { display: flex; align-items: baseline; gap: 10px; text-decoration: none; color: var(--ink); }
.brand-mark {
  font-weight: 700; font-size: 30px; letter-spacing: -0.02em; line-height: 1;
}
.brand-mark span { color: var(--accent); }
.brand-sub { font-family: var(--mono); font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-faint); }
nav.primary { display: flex; flex-wrap: wrap; gap: 4px 18px; font-family: var(--mono); font-size: 13px; letter-spacing: .04em; }
nav.primary a { color: var(--ink-soft); text-decoration: none; padding: 4px 0; border-bottom: 1px solid transparent; }
nav.primary a:hover { color: var(--ink); border-bottom-color: var(--ink); }
nav.primary a[aria-current="page"] { color: var(--ink); border-bottom: 2px solid var(--accent); }

/* ---------- the sheet ---------- */
.sheet {
  position: relative;
  max-width: 1040px; margin: 28px auto 32px;
  background: var(--paper);
  background-image: repeating-linear-gradient(to bottom, transparent 0, transparent 31px, var(--rule-blue) 31px, var(--rule-blue) 32px);
  box-shadow: var(--shadow);
  border-radius: 2px;
  padding: 72px 80px 80px 112px;
}
.sheet::before { /* margin line */
  content: ""; position: absolute; top: 0; bottom: 0; left: 76px; width: 0;
  border-left: 1.5px solid var(--margin-red);
}
.sheet::after { /* punch holes */
  content: ""; position: absolute; left: 26px; top: 120px; width: 18px; height: 18px; border-radius: 50%;
  background: var(--desk);
  box-shadow: inset 0 2px 3px rgba(0,0,0,.18), 0 320px 0 0 var(--desk), 0 640px 0 0 var(--desk);
}
.sheet > * { position: relative; }

.kicker { font-family: var(--mono); font-size: 12px; letter-spacing: .16em; text-transform: uppercase; color: var(--accent-ink); margin: 0 0 12px; }
h1 { font-size: clamp(34px, 5vw, 54px); line-height: 1.08; letter-spacing: -0.02em; font-weight: 600; margin: 0 0 18px; text-wrap: balance; }
h2 { font-size: 27px; line-height: 1.25; font-weight: 600; margin: 52px 0 12px; letter-spacing: -0.01em; scroll-margin-top: 24px; }
h3 { font-size: 20px; font-weight: 600; margin: 30px 0 8px; }
h2 .num { font-family: var(--mono); font-size: 14px; color: var(--accent-ink); font-weight: 500; margin-right: 10px; vertical-align: 4px; }
p, ul, ol { margin: 0 0 16px; }
li { margin-bottom: 6px; }
ul { padding-left: 22px; }
.lede { font-size: 22px; line-height: 1.55; color: var(--ink-soft); max-width: 46em; }
.meta { font-family: var(--mono); font-size: 13px; color: var(--ink-faint); border-top: 1px dashed var(--rule); border-bottom: 1px dashed var(--rule); padding: 10px 0; margin: 24px 0 8px; display: flex; flex-wrap: wrap; gap: 6px 28px; }
mark, .hl { background: linear-gradient(transparent 55%, var(--highlight) 55%); color: inherit; padding: 0 2px; }
hr { border: 0; border-top: 1px solid var(--rule); margin: 48px 0; }
code, .mono { font-family: var(--mono); font-size: .86em; }
strong { font-weight: 650; }

/* ---------- table of contents ---------- */
.toc {
  margin: 28px 0 8px; padding: 20px 24px; border: 1px solid var(--rule); background: color-mix(in srgb, var(--paper) 70%, var(--paper-edge));
  columns: 2; column-gap: 32px; font-size: 16px;
}
.toc strong { display: block; font-family: var(--mono); font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-faint); margin-bottom: 8px; column-span: all; }
.toc ol { margin: 0; padding-left: 22px; }
.toc li { margin-bottom: 4px; break-inside: avoid; }
.toc a { text-decoration: none; color: var(--ink-soft); }
.toc a:hover { color: var(--accent-ink); text-decoration: underline; }

/* ---------- tables ---------- */
.table-wrap { overflow-x: auto; margin: 16px 0 24px; }
table { border-collapse: collapse; width: 100%; font-size: 15.5px; line-height: 1.5; }
th, td { text-align: left; vertical-align: top; padding: 10px 12px; border-bottom: 1px solid var(--rule); }
th { font-family: var(--mono); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-faint); font-weight: 500; border-bottom: 1.5px solid var(--ink-soft); }

/* ---------- notes & callouts ---------- */
.note {
  margin: 24px 0; padding: 18px 22px; background: color-mix(in srgb, #f6e7a8 45%, var(--paper));
  border-left: 3px solid #c9a227; transform: rotate(-0.25deg); box-shadow: 0 2px 6px rgba(60,45,20,.08);
}
@media (prefers-color-scheme: dark) { .note { background: color-mix(in srgb, #6b5a1f 35%, var(--paper)); } }
.note p:last-child { margin-bottom: 0; }
.stamp {
  display: inline-block; font-family: var(--mono); font-size: 12px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--accent); border: 1.5px solid var(--accent); padding: 4px 10px; border-radius: 3px; transform: rotate(-3deg); opacity: .85;
}

/* ---------- home grids ---------- */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 20px; margin: 24px 0; }
.card {
  background: var(--paper); border: 1px solid var(--rule); padding: 20px 22px; position: relative;
  box-shadow: 2px 3px 0 var(--paper-edge);
}
.card h3 { margin-top: 0; }
.card p { font-size: 16px; color: var(--ink-soft); margin: 0; }
.card .tag { font-family: var(--mono); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-faint); display: block; margin-bottom: 6px; }
.platforms { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0 8px; padding: 0; list-style: none; }
.platforms li { font-family: var(--mono); font-size: 13px; border: 1px solid var(--ink-soft); padding: 4px 12px; border-radius: 999px; margin: 0; }

.btn {
  display: inline-block; font-family: var(--mono); font-size: 14px; letter-spacing: .04em; text-decoration: none;
  background: var(--ink); color: var(--paper); padding: 12px 20px; border-radius: 2px; border: 0; cursor: pointer;
  box-shadow: 3px 3px 0 var(--accent);
}
.btn:hover { color: var(--paper); transform: translate(-1px, -1px); box-shadow: 4px 4px 0 var(--accent); }
.btn.ghost { background: transparent; color: var(--ink); border: 1.5px solid var(--ink); box-shadow: none; }
.actions { display: flex; flex-wrap: wrap; gap: 14px; margin: 28px 0 8px; }

/* ---------- forms ---------- */
form.letter { display: grid; gap: 18px; margin-top: 20px; max-width: 640px; }
label { font-family: var(--mono); font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-faint); display: block; margin-bottom: 4px; }
input, select, textarea {
  width: 100%; font: inherit; font-size: 17px; color: var(--ink); background: transparent;
  border: 0; border-bottom: 1.5px solid var(--ink-soft); padding: 8px 2px; border-radius: 0;
}
textarea { min-height: 180px; resize: vertical; line-height: 32px;
  background-image: repeating-linear-gradient(to bottom, transparent 0, transparent 31px, var(--rule) 31px, var(--rule) 32px); border: 0; }
input:focus, select:focus, textarea:focus { outline: none; border-bottom-color: var(--accent); }
select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--ink-soft) 50%), linear-gradient(135deg, var(--ink-soft) 50%, transparent 50%); background-position: calc(100% - 14px) 55%, calc(100% - 9px) 55%; background-size: 5px 5px; background-repeat: no-repeat; }
select option { background: var(--paper); color: var(--ink); }

details { border-bottom: 1px solid var(--rule); padding: 12px 0; }
details summary { cursor: pointer; font-weight: 600; font-size: 19px; list-style: none; position: relative; padding-right: 28px; }
details summary::-webkit-details-marker { display: none; }
details summary::after { content: "+"; position: absolute; right: 4px; top: 0; font-family: var(--mono); color: var(--accent); }
details[open] summary::after { content: "–"; }
details > div { padding-top: 10px; color: var(--ink-soft); }

.envelope {
  border: 1px solid var(--rule); padding: 22px 24px; margin: 20px 0;
  background:
    repeating-linear-gradient(135deg, var(--accent) 0 10px, transparent 10px 20px, #2f5d8a 20px 30px, transparent 30px 40px) top / 100% 5px no-repeat,
    repeating-linear-gradient(135deg, var(--accent) 0 10px, transparent 10px 20px, #2f5d8a 20px 30px, transparent 30px 40px) bottom / 100% 5px no-repeat,
    var(--paper);
}
.envelope .addr { font-size: 26px; font-weight: 600; word-break: break-word; }

/* ---------- footer ---------- */
footer.colophon {
  max-width: 1040px; margin: 0 auto; padding: 0 24px 48px; font-family: var(--mono); font-size: 13px; color: var(--ink-faint);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px 28px;
}
footer.colophon nav { display: flex; flex-wrap: wrap; gap: 6px 18px; }
footer.colophon a { color: var(--ink-faint); text-decoration: none; }
footer.colophon a:hover { color: var(--ink); text-decoration: underline; }

/* ---------- responsive ---------- */
@media (max-width: 760px) {
  body { font-size: 17px; }
  .masthead { padding: 20px 16px 0; }
  .sheet { margin: 20px 10px 24px; padding: 40px 20px 48px 40px; }
  .sheet::before { left: 24px; }
  .sheet::after { display: none; }
  .toc { columns: 1; }
  .lede { font-size: 19px; }
  h2 { font-size: 23px; margin-top: 40px; }
  footer.colophon { padding: 0 16px 36px; }
}

@media print {
  body { background: #fff; color: #000; font-size: 11.5pt; }
  .masthead nav, footer.colophon nav, .actions, .toc { display: none; }
  .sheet { box-shadow: none; padding: 0; margin: 0; background: #fff; max-width: none; }
  .sheet::before, .sheet::after { display: none; }
  a { color: #000; }
}