/* ==========================================================================
   tilmannb.de — a link page.
   Papercraft in reality: one folded-paper object, everything else plain and
   real. The paper model is generated by gen_papercraft.py.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Work+Sans:wght@400;500;600;700&display=swap');

:root {
  --bg: #fbfaf8;
  --surface: #ffffff;
  --line: #eae8e4;
  --line-strong: #dcd9d3;

  --ink: #26262a;
  --ink-soft: #6e6e75;
  --ink-faint: #9b9ba2;

  --accent: #e8722a;
  --accent-deep: #c15a1b;

  --font: 'Work Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

.wrap {
  max-width: 700px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  display: flex;
  align-items: center;
  gap: 20px;
  padding-top: 64px;
  padding-bottom: 28px;
}

.portrait {
  flex: 0 0 96px;
  width: 96px;
  aspect-ratio: 1;
  border-radius: 14px;
  overflow: hidden;
  background: var(--line);
}
.portrait.is-empty {
  background: linear-gradient(150deg, var(--line), var(--line-strong));
}
.portrait img { width: 100%; height: 100%; object-fit: cover; }

.identity { flex: 1 1 260px; min-width: 0; }

h1 {
  font-size: clamp(1.7rem, 5vw, 2.15rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 6px;
}

/* ==========================================================================
   The city. It is always attempted — it is the page — and it takes the whole
   window, with everything else floating over it. If it cannot start at all,
   what is left is the plain list of links.
   ========================================================================== */
.city3d {
  position: fixed;
  inset: 0;
  z-index: 0;
}
.city3d canvas { display: block; width: 100%; height: 100%; }

body.city-3d { overflow: hidden; }
body.city-3d .links { display: none; }

/* While the models are on their way, the loader has the screen to itself. If
   the city fails, the class comes off and the list of links is what shows. */
html.city-loading body { overflow: hidden; }
html.city-loading .links,
html.city-loading .shot { display: none; }

.city-loader { display: none; }
html.city-loading .city-loader {
  position: fixed;
  inset: 0;
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  background: var(--bg);
}
.city-loader-label {
  margin: 0;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.city-loader-track {
  width: min(280px, 60vw);
  height: 4px;
  border-radius: 999px;
  background: var(--line);
  overflow: hidden;
}
.city-loader-track span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: 999px;
  background: var(--accent);
  transition: width 0.25s ease;
}

body.city-3d .hero {
  position: fixed;
  top: 18px;
  left: 18px;
  z-index: 2;
  margin: 0;
  padding: 16px 20px;
  width: auto;
  max-width: min(420px, calc(100vw - 36px));
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(10px);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 6px 24px rgba(38, 38, 42, 0.12);
}

body.city-3d footer {
  position: fixed;
  right: 18px;
  bottom: 16px;
  z-index: 2;
  padding: 0;
}
body.city-3d footer .wrap {
  max-width: none;
  padding: 8px 14px;
  gap: 16px;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(10px);
  border: 1px solid var(--line);
  border-radius: 999px;
}

/* What the people talk about. Three controls on the hero card, folded away
   behind a summary that shows what they currently say. */
.city-talk {
  margin: 14px 0 0;
  padding-top: 13px;
  border-top: 1px solid var(--line);
}

/* The header is a control, so it looks like one: a bar you can obviously
   press, with the word for what pressing it does at the right-hand end. An
   unlabelled triangle was too easy to miss. */
.city-talk-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  cursor: pointer;
  list-style: none;                 /* the default marker, everywhere */
  padding: 7px 11px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--bg);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  transition: border-color 0.15s ease, background 0.15s ease;
}
.city-talk-summary::-webkit-details-marker { display: none; }
.city-talk-summary:hover {
  border-color: var(--line-strong);
  background: #fff;
}
.city-talk-summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.city-talk-what {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.city-talk-toggle {
  display: flex;
  align-items: center;
  gap: 5px;
  flex: 0 0 auto;
  color: var(--accent-deep);
  text-transform: uppercase;
  letter-spacing: 0.09em;
}
.city-talk-toggle::after {
  content: '';
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
  transition: transform 0.15s ease;
}
.city-talk[open] .city-talk-toggle::after { transform: rotate(180deg); }

.city-talk-form {
  display: flex;
  flex-direction: column;
  gap: 11px;
  margin-top: 13px;
}

.city-talk-row {
  display: block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.city-talk-row > span {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 5px;
}
.city-talk-row output {
  font-variant-numeric: tabular-nums;
  color: var(--accent-deep);
}
/* Something to click when the topic field is empty and nothing comes to mind. */
.city-topics {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: -3px;
}

.city-topic {
  font: inherit;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: none;
  cursor: pointer;
  padding: 3px 9px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: #fff;
  color: var(--ink-soft);
  transition: border-color 0.12s ease, color 0.12s ease, background 0.12s ease;
}
.city-topic:hover {
  border-color: var(--accent);
  color: var(--accent-deep);
}
.city-topic.is-on {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

/* Empty most of the time — it only speaks up while something is loading or
   when nothing is coming — so it takes no room then. */
.city-talk-note:empty { display: none; }

.city-talk-note:empty { display: none; }

/* The two ends of the scale belong at its two ends, under the track, not in a
   line of prose underneath it. */

.city-talk input[type="text"] {
  width: 100%;
  font: inherit;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: normal;
  text-transform: none;
  color: var(--ink);
  padding: 7px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: #fff;
}
.city-talk input[type="text"]:focus {
  outline: none;
  border-color: var(--accent);
}

.city-talk-note {
  margin: 0;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: normal;
  text-transform: none;
  line-height: 1.35;
  color: var(--ink-faint);
}

.city-labels {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

/* What the people say to each other when they bump into someone. */
.city-bubble {
  position: absolute;
  transform: translate(-50%, -100%) scale(0.6);
  transform-origin: 50% 100%;
  opacity: 0;
  pointer-events: none;
  /* A long line used to make one very wide bubble, because nothing wrapped.
     Two lines are better than a banner: it breaks at about thirty characters
     and never gets wider than three quarters of the window, whichever comes
     first. `balance` keeps the two lines roughly even instead of leaving one
     word stranded underneath. */
  white-space: normal;
  max-width: min(30ch, 75vw);
  text-align: center;
  text-wrap: balance;
  line-height: 1.3;
  padding: 4px 9px;
  border-radius: 11px;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: 0 2px 6px rgba(38, 38, 42, 0.16);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--ink);
  transition: opacity 0.12s ease, transform 0.12s ease;
}
.city-bubble.is-on {
  opacity: 1;
  transform: translate(-50%, -100%) scale(1);
}
/* names of Tilmann's things become links where they come up in a line */
.city-bubble a {
  pointer-events: auto;
  color: var(--accent-deep);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.city-bubble a:hover { color: var(--accent); }
/* the tail */
.city-bubble.is-on::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: -4px;
  width: 7px;
  height: 7px;
  margin-left: -3.5px;
  background: #fff;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  transform: rotate(45deg);
}

/* the whole building lifts as one, sign included */
.bld {
  cursor: pointer;
  transition: transform 0.16s ease;
}
.bld:hover,
.bld:focus-visible { transform: translateY(-7px); }
.bld:focus { outline: none; }
.bld:focus-visible rect { stroke: var(--accent); stroke-width: 2; }

/* ==========================================================================
   Photographs — a paper model in a real place (see IMAGE_PROMPTS.md).
   The whole figure removes itself if the file isn't there yet.
   ========================================================================== */
.shot {
  margin: 0 0 32px;
  border-radius: 14px;
  overflow: hidden;
  background: var(--line);
  box-shadow: 0 1px 2px rgba(38, 38, 42, 0.05), 0 10px 26px rgba(38, 38, 42, 0.07);
}
.shot img { width: 100%; height: auto; }

/* ==========================================================================
   Links
   ========================================================================== */
/* What is left of the page when the city cannot start: hidden while it loads,
   hidden once it has, and on screen otherwise. */
.links { display: block; padding-bottom: 24px; }

.group {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 26px 0 10px;
}
.group:first-child { margin-top: 0; }

.row {
  position: relative;
  display: flex;
  align-items: center;
  gap: 13px;
  padding: 13px 16px;
  margin-bottom: 8px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 11px;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.row:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
  box-shadow: 0 6px 16px rgba(38, 38, 42, 0.09);
}

.ico {
  flex: 0 0 auto;
  display: flex;
  color: var(--accent);
}
.ico svg { width: 18px; height: 18px; }

.label { font-weight: 600; font-size: 0.96rem; }

.meta {
  margin-left: auto;
  padding-right: 4px;
  font-size: 0.85rem;
  color: var(--ink-faint);
  text-align: right;
}

.arrow { flex: 0 0 auto; display: flex; color: var(--line-strong); }
.arrow svg { width: 13px; height: 13px; transition: transform 0.15s ease; }
.row:hover .arrow { color: var(--accent); }
.row:hover .arrow svg { transform: translate(2px, -2px); }

/* ==========================================================================
   Footer
   ========================================================================== */
footer {
  padding: 24px 0 52px;
  font-size: 0.82rem;
  color: var(--ink-faint);
}
footer .wrap { display: flex; justify-content: space-between; gap: 12px; }
footer a { color: var(--ink-soft); font-weight: 600; }
footer a:hover { color: var(--accent-deep); }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 620px) {
  .hero {
    flex-wrap: wrap;
    padding-top: 44px;
    gap: 16px;
  }
  .portrait { flex-basis: 76px; width: 76px; }

  .row { flex-wrap: wrap; row-gap: 2px; }
  .label { flex: 1; }
  .arrow { order: 2; }
  .meta { order: 3; margin-left: 0; flex-basis: 100%; text-align: left; }
}