/* ───────────────────────────────────────────────────────────────
   Reinschrift — landing page
   Aesthetic: ink on paper. Cream stock, set type, ballpoint blue,
   red pencil for due dates, a neat green check.
   ─────────────────────────────────────────────────────────────── */

:root {
  --paper: #f5efe2;
  --paper-deep: #ede5d3;
  --ink: #211d16;
  --ink-soft: #5c5547;
  --blue: #1a5fb4;
  --blue-soft: #99c1f1;
  --red: #a8321a;
  --green: #26a269;
  --teal: #1f7a72;
  --dark: #26221b;
  --dark-ink: #efe7d6;
  --rule: rgba(33, 29, 22, 0.16);
  --serif: "Instrument Serif", Georgia, serif;
  --sans: "Instrument Sans", "Cantarell", sans-serif;
  --mono: "IBM Plex Mono", "Liberation Mono", monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  overflow-x: hidden;
}

/* paper grain over everything */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 2000;
  opacity: 0.5;
  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='0.9' numOctaves='2'/%3E%3CfeColorMatrix values='0 0 0 0 0  0 0 0 0 0  0 0 0 0 0  0 0 0 0.05 0'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}

::selection { background: var(--blue-soft); color: var(--ink); }

a { color: var(--blue); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--red); }

.wrap { max-width: 68rem; margin: 0 auto; padding: 0 1.5rem; }

/* ── header ───────────────────────────────────────────────────── */

header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--rule);
}

header img { width: 34px; height: 34px; }

header .brand {
  font-family: var(--serif);
  font-size: 1.45rem;
  letter-spacing: 0.01em;
  color: var(--ink);
  text-decoration: none;
}
header .brand:hover { color: var(--ink); }

header nav {
  margin-left: auto;
  display: flex;
  gap: 1.4rem;
  align-items: center;
  font-family: var(--mono);
  font-size: 0.8rem;
}
header nav a { color: var(--ink-soft); text-decoration: none; }
header nav a:hover { color: var(--blue); }
header nav .lang { border: 1px solid var(--rule); padding: 0.15rem 0.55rem; border-radius: 999px; }

/* ── hero ─────────────────────────────────────────────────────── */

.hero { padding: 5rem 0 4rem; position: relative; }

.kicker {
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 1.6rem;
}
.kicker::before { content: "§ "; color: var(--red); }

h1 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(2.9rem, 7.5vw, 5.4rem);
  line-height: 1.04;
  letter-spacing: -0.015em;
  max-width: 14ch;
}
h1 em {
  font-style: italic;
  color: var(--blue);
}
/* hand-drawn underline under the em */
h1 em {
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 120 8' preserveAspectRatio='none'%3E%3Cpath d='M2 6 Q 30 1 60 4 T 118 3' fill='none' stroke='%231a5fb4' stroke-width='2.2' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat bottom / 100% 0.14em;
  padding-bottom: 0.16em;
}

.hero .lede {
  margin-top: 1.8rem;
  max-width: 36rem;
  font-size: 1.15rem;
  color: var(--ink-soft);
}
.hero .lede strong { color: var(--ink); font-weight: 600; }

.cta-row {
  margin-top: 2.4rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}
.cta-row .flathub img { height: 52px; display: block; }

.cmd {
  font-family: var(--mono);
  font-size: 0.82rem;
  background: var(--dark);
  color: var(--dark-ink);
  border-radius: 8px;
  padding: 0.65rem 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  border: none;
  cursor: pointer;
  box-shadow: 2px 3px 0 rgba(33, 29, 22, 0.25);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}
.cmd:hover { transform: translate(-1px, -1px); box-shadow: 3px 4px 0 rgba(33, 29, 22, 0.3); }
.cmd::before { content: "$"; color: var(--green); }
.cmd .copied { color: var(--green); font-size: 0.72rem; }

/* ── the living file card ─────────────────────────────────────── */

.desk {
  margin-top: 4.5rem;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
  gap: 2.5rem;
  align-items: start;
}

.file-card {
  background: var(--dark);
  color: var(--dark-ink);
  border-radius: 12px;
  box-shadow: 6px 8px 0 rgba(33, 29, 22, 0.18);
  transform: rotate(-0.6deg);
  overflow: hidden;
}
.file-bar {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: rgba(239, 231, 214, 0.6);
  padding: 0.7rem 1rem;
  border-bottom: 1px solid rgba(239, 231, 214, 0.12);
}
.file-bar .dot { width: 9px; height: 9px; border-radius: 50%; background: rgba(239, 231, 214, 0.25); }
.file-bar .name { margin-left: 0.4rem; }

.file-lines {
  font-family: var(--mono);
  font-size: clamp(0.62rem, 1.45vw, 0.82rem);
  line-height: 2.1;
  padding: 1.1rem 1.2rem 1.3rem;
  white-space: pre;
  overflow-x: auto;
}
.t-proj { color: #78b3f5; }
.t-ctx  { color: #6fd0c5; }
.t-due  { color: #f08a6e; }
.t-rec  { color: #d3a7f0; }
.t-done { color: #8ad29e; }
.t-dim  { color: rgba(239, 231, 214, 0.45); }

.typed-wrap { display: inline-flex; align-items: baseline; }
.typed {
  display: inline-block;
  overflow: hidden;
  white-space: pre;
  max-width: 0;
  animation: type 2.4s steps(52, end) 0.9s forwards;
}
.caret {
  display: inline-block;
  width: 0.55em;
  height: 1.15em;
  transform: translateY(0.18em);
  background: var(--dark-ink);
  animation: blink 0.9s steps(1) infinite;
}
@keyframes type { to { max-width: 60ch; } }
@keyframes blink { 50% { opacity: 0; } }

/* the parsed result slides in once the line is "written" */
.parsed-card {
  background: #fffdf7;
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 1.2rem 1.3rem;
  box-shadow: 5px 7px 0 rgba(33, 29, 22, 0.12);
  transform: rotate(1deg) translateY(14px);
  opacity: 0;
  animation: appear 0.55s cubic-bezier(0.2, 0.8, 0.3, 1.1) 3.6s forwards;
  position: relative;
}
.parsed-card::before {
  content: "parsed ↑";
  position: absolute;
  top: -1.7rem;
  left: 1rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--ink-soft);
}
@keyframes appear { to { opacity: 1; transform: rotate(1deg) translateY(0); } }

.parsed-card .row { display: flex; align-items: center; gap: 0.7rem; }
.parsed-card .box {
  width: 1.15rem; height: 1.15rem;
  border: 2px solid var(--ink-soft);
  border-radius: 4px;
  flex: none;
}
.parsed-card .title { font-weight: 600; font-size: 1.05rem; }
.chips { display: flex; flex-wrap: wrap; gap: 0.45rem; margin-top: 0.8rem; }
.chip {
  font-family: var(--mono);
  font-size: 0.72rem;
  padding: 0.18rem 0.6rem;
  border-radius: 999px;
  border: 1px solid currentColor;
}
.chip.proj { color: var(--blue); }
.chip.ctx  { color: var(--teal); }
.chip.due  { color: var(--red); }

/* ── section scaffolding ──────────────────────────────────────── */

section { padding: 4.5rem 0 1rem; }

.sec-label {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin-bottom: 1.2rem;
}
.sec-label::after { content: ""; height: 1px; background: var(--rule); flex: 1; }
.sec-label b { color: var(--red); font-weight: 400; }

h2 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  line-height: 1.15;
  max-width: 24ch;
  margin-bottom: 1rem;
}

.sec-intro { color: var(--ink-soft); max-width: 38rem; }

/* ── format legend ────────────────────────────────────────────── */

.format-line {
  margin: 2.2rem 0 1.6rem;
  background: #fffdf7;
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 1.4rem 1.4rem;
  font-family: var(--mono);
  font-size: clamp(0.68rem, 1.7vw, 0.95rem);
  white-space: pre;
  overflow-x: auto;
  box-shadow: 4px 6px 0 rgba(33, 29, 22, 0.1);
}
.format-line .f-proj { color: var(--blue); }
.format-line .f-ctx { color: var(--teal); }
.format-line .f-due { color: var(--red); }
.format-line .f-rec { color: #7a3fa8; }
.format-line .f-note { color: var(--ink-soft); }
.format-line .f-id { color: var(--ink-soft); opacity: 0.7; }

.legend {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
  gap: 0.4rem 2rem;
  font-size: 0.92rem;
}
.legend div { display: flex; gap: 0.7rem; padding: 0.5rem 0; border-bottom: 1px dashed var(--rule); }
.legend code { font-family: var(--mono); font-size: 0.8rem; min-width: 7.5ch; }
.legend .f-proj { color: var(--blue); }
.legend .f-ctx { color: var(--teal); }
.legend .f-due { color: var(--red); }
.legend .f-rec { color: #7a3fa8; }
.legend span { color: var(--ink-soft); }

/* ── three surfaces ───────────────────────────────────────────── */

.surfaces {
  margin-top: 2.5rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 2.5rem 3rem;
  align-items: start;
}

.shot {
  position: relative;
  transform: rotate(-1.1deg);
}
.shot img {
  width: 100%;
  display: block;
  border-radius: 10px;
  border: 1px solid var(--rule);
  box-shadow: 8px 10px 0 rgba(33, 29, 22, 0.14);
}
/* tape strips */
.shot::before, .shot::after {
  content: "";
  position: absolute;
  width: 6.5rem; height: 1.7rem;
  background: rgba(214, 196, 156, 0.55);
  box-shadow: 0 1px 2px rgba(33, 29, 22, 0.12);
  z-index: 2;
}
.shot::before { top: -0.8rem; left: -1.6rem; transform: rotate(-38deg); }
.shot::after { bottom: -0.7rem; right: -1.4rem; transform: rotate(-35deg); }

.surface-notes { display: flex; flex-direction: column; gap: 1.7rem; }

.surface h3 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 1.45rem;
  margin-bottom: 0.3rem;
}
.surface h3 .no {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--red);
  vertical-align: 0.5em;
  margin-right: 0.5rem;
}
.surface p { color: var(--ink-soft); font-size: 0.97rem; }

.terminal {
  background: var(--dark);
  color: var(--dark-ink);
  border-radius: 10px;
  font-family: var(--mono);
  font-size: 0.78rem;
  line-height: 1.9;
  padding: 1rem 1.2rem;
  margin-top: 0.9rem;
  white-space: pre;
  overflow-x: auto;
  box-shadow: 4px 6px 0 rgba(33, 29, 22, 0.18);
  transform: rotate(0.5deg);
}
.terminal .p { color: var(--green); }
.terminal .c { color: rgba(239, 231, 214, 0.55); }

/* ── features ─────────────────────────────────────────────────── */

.features {
  margin-top: 2.4rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 0;
  border-top: 1px solid var(--rule);
  border-left: 1px solid var(--rule);
}
.feature {
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 1.5rem 1.4rem 1.7rem;
  position: relative;
  background: linear-gradient(transparent, transparent);
  transition: background 0.2s ease;
}
.feature:hover { background: rgba(255, 253, 247, 0.85); }
.feature .check {
  font-family: var(--mono);
  color: var(--green);
  font-size: 0.95rem;
}
.feature h3 {
  display: inline;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 1rem;
  margin-left: 0.35rem;
}
.feature p { margin-top: 0.55rem; color: var(--ink-soft); font-size: 0.92rem; }
.feature .opt {
  position: absolute;
  top: 1rem; right: 1rem;
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  border: 1px solid var(--rule);
  border-radius: 999px;
  padding: 0.08rem 0.5rem;
}

/* ── install ──────────────────────────────────────────────────── */

.install-grid {
  margin-top: 2.4rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr));
  gap: 1.6rem;
}
.install-card {
  background: #fffdf7;
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 1.6rem 1.5rem;
  box-shadow: 4px 6px 0 rgba(33, 29, 22, 0.1);
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}
.install-card:nth-child(2) { transform: rotate(0.4deg); }
.install-card:nth-child(1) { transform: rotate(-0.4deg); }
.install-card h3 { font-family: var(--serif); font-weight: 400; font-size: 1.4rem; }
.install-card p { color: var(--ink-soft); font-size: 0.92rem; flex: 1; }
.install-card .cmd { align-self: flex-start; max-width: 100%; overflow-x: auto; }
.install-card .flathub img { height: 48px; display: block; }
.install-card .alt { font-family: var(--mono); font-size: 0.72rem; color: var(--ink-soft); }
.install-card .alt a { color: inherit; }

/* ── footer ───────────────────────────────────────────────────── */

footer {
  margin-top: 5rem;
  border-top: 1px solid var(--rule);
  padding: 2.5rem 0 3rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2.5rem;
  align-items: baseline;
  font-size: 0.9rem;
  color: var(--ink-soft);
}
footer .meaning {
  width: 100%;
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.25rem;
  color: var(--ink);
  max-width: 44rem;
}
footer .meaning b { color: var(--blue); font-weight: 400; }
footer nav { display: flex; flex-wrap: wrap; gap: 1.6rem; font-family: var(--mono); font-size: 0.78rem; }

/* ── reveal on scroll ─────────────────────────────────────────── */

/* hidden only when JS is present (body.js), so content never disappears without it */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.6s ease, transform 0.6s ease; }
.js .reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .typed { animation-duration: 0.01s; animation-delay: 0s; }
  .parsed-card { animation-duration: 0.01s; animation-delay: 0.2s; }
  .caret { animation: none; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ── responsive ───────────────────────────────────────────────── */

@media (max-width: 52rem) {
  .desk { grid-template-columns: 1fr; }
  .parsed-card { transform: rotate(0deg); max-width: 26rem; }
  .surfaces { grid-template-columns: 1fr; }
  header nav a.gh { display: none; }
  .hero { padding-top: 3.2rem; }
}