/*  chat.pencil.md — same paper + ink system as styles.css.
 *  Mono chrome, serif messages, square pattern avatars, one accent.
 */

/* ---------- landing ---------- */

.chat-home {
  max-width: 40rem;
  margin: 0 auto;
  padding: 3.5rem var(--pad) 4rem;
}
.chat-home__brand {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-soft);
  text-decoration: none;
}
.chat-home__brand:hover { color: var(--ink); }
.chat-home__title {
  font-size: clamp(3rem, 9vw, 4.6rem);
  line-height: 1;
  font-weight: 500;
  letter-spacing: -0.02em;
  margin: 0.6rem 0 1rem;
}
.chat-home__lede { font-size: 1.15rem; color: var(--ink-soft); margin: 0 0 2rem; }
.chat-home__form { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 2.75rem; }
.chat-home__input {
  flex: 1 1 14rem;
  min-width: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  background: var(--bg);
  border: var(--rule-w) solid var(--rule);
  border-radius: 2px;
  padding: 0.45rem 0.7rem;
}
.chat-home__input:focus { border-color: var(--ink-soft); outline: none; }
.chat-home__h2 {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  margin: 0 0 0.6rem;
}
.chat-home__rules { border-top: var(--rule-w) solid var(--rule); padding-top: 1.1rem; margin-bottom: 1.8rem; }
.chat-home__rules ul { margin: 0; padding-left: 1.1rem; }
.chat-home__rules li { margin: 0.25rem 0; }
.chat-home__rules p { margin: 0; }
.chat-home__rules code, .chat-home__list span {
  font-family: var(--font-mono);
  font-size: 0.78em;
}
.chat-home__recent { margin-bottom: 2rem; }
.chat-home__list { list-style: none; margin: 0; padding: 0; }
.chat-home__list li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.45rem 0;
  border-bottom: var(--rule-w) solid var(--rule);
}
.chat-home__list span { color: var(--ink-soft); white-space: nowrap; }
.chat-home__foot { font-family: var(--font-mono); font-size: 11px; color: var(--ink-soft); margin-top: 3rem; }
.chat-home__foot a { color: var(--ink-soft); }

/* ---------- room frame ---------- */

.chat-room { overflow: hidden; }
.chat {
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
  position: relative;
}

.chat-bar {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 0.55rem var(--pad);
  border-bottom: var(--rule-w) solid var(--rule);
  font-family: var(--font-mono);
  font-size: 12px;
  min-height: 3.2rem;
}
.chat-bar__home { color: var(--ink); text-decoration: none; font-weight: 600; white-space: nowrap; }
.chat-bar__home span { color: var(--ink-soft); font-weight: 400; }
.chat-bar__title {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 500;
  margin: 0;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.chat-bar__meta { display: flex; gap: 0.9rem; color: var(--ink-soft); margin-left: auto; white-space: nowrap; }
.chat-bar__actions { display: flex; gap: 0.4rem; align-items: center; }

.chat-icon-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: transparent;
  border: var(--rule-w) solid transparent;
  border-radius: 2px;
  color: var(--ink-soft);
  padding: 0.4rem 0.5rem;
  font-family: var(--font-mono);
  font-size: 12px;
  cursor: pointer;
}
.chat-icon-btn:hover { color: var(--ink); border-color: var(--rule); }
.chat-icon-btn:disabled { opacity: 0.35; cursor: not-allowed; }
.chat-icon-btn:disabled:hover { border-color: transparent; color: var(--ink-soft); }

/* ---------- participants ---------- */

.chat-people {
  position: absolute;
  top: 3.2rem;
  right: var(--pad);
  z-index: 20;
  width: min(20rem, calc(100vw - 2 * var(--pad)));
  max-height: min(28rem, 70vh);
  overflow: auto;
  background: var(--bg);
  border: var(--rule-w) solid var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 12px;
}
.chat-people__head {
  display: flex;
  justify-content: space-between;
  padding: 0.6rem 0.8rem;
  border-bottom: var(--rule-w) solid var(--rule);
  color: var(--ink-soft);
  position: sticky;
  top: 0;
  background: var(--bg);
}
.chat-people__list { list-style: none; margin: 0; padding: 0.3rem 0; }
.chat-people__list li { display: flex; align-items: center; gap: 0.55rem; padding: 0.3rem 0.8rem; }
.chat-people__name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chat-people__name em { color: var(--ink-soft); font-style: normal; }
.chat-people__dot { width: 7px; height: 7px; border: var(--rule-w) solid var(--ink-soft); flex: none; }
.chat-people__list li.is-online .chat-people__dot { background: var(--accent); border-color: var(--accent); }
.chat-people__me { border-top: var(--rule-w) solid var(--rule); display: flex; flex-direction: column; align-items: flex-start; padding: 0.3rem 0.3rem 0.4rem; }
.chat-people__me .btn { font-size: 12px; }

/* ---------- log ---------- */

.chat-log {
  flex: 1;
  overflow-y: auto;
  overscroll-behavior: contain;
  outline: none;
}
.chat-log__inner {
  max-width: 52rem;
  margin: 0 auto;
  padding: 1.2rem var(--pad) 0.6rem;
}
.chat-loading, .chat-empty {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-soft);
  text-align: center;
  padding: 3rem 0;
}

.chat-day {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin: 1.2rem 0 0.6rem;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-soft);
}
.chat-day::before, .chat-day::after { content: ""; flex: 1; border-top: var(--rule-w) solid var(--rule); }

.chat-sys {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-soft);
  margin: 0.5rem 0 0.5rem 3.2rem;
}
.chat-sys .msg__name { color: var(--ink); font-weight: 500; }
.chat-sys time { margin-left: 0.2rem; }
.chat-sys--note { margin-left: 0; justify-content: center; padding: 0.4rem; border: var(--rule-w) dashed var(--rule); }

.avatar { display: block; flex: none; }

.msg {
  display: grid;
  grid-template-columns: 2.25rem minmax(0, 1fr);
  gap: 0.95rem;
  margin-top: 0.9rem;
}
.msg--cont { margin-top: 0.15rem; }
.msg__avatar { padding-top: 0.2rem; }
.msg__head {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.4;
  margin-bottom: 0.15rem;
}
.msg__name { font-weight: 600; overflow-wrap: anywhere; }
.msg__head time { color: var(--ink-soft); }
.msg--mine .msg__name { background: var(--accent); color: var(--accent-ink); padding: 0 0.3em; }
.msg__badge {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border: var(--rule-w) solid var(--rule);
  color: var(--ink-soft);
  padding: 0 0.35em;
  line-height: 1.5;
}

/* Messages reuse the page prose styles, tightened for a chat column. */
.msg__text.prose {
  font-size: 17px;
  line-height: 1.5;
  max-width: none;
  overflow-wrap: anywhere;
}
.msg__text.prose > :first-child { margin-top: 0; }
.msg__text.prose > :last-child { margin-bottom: 0; }
.msg__text.prose p { margin: 0.3em 0; }
.msg__text.prose h1, .msg__text.prose h2, .msg__text.prose h3 { margin: 0.6em 0 0.3em; line-height: 1.25; }
.msg__text.prose h1 { font-size: 1.45em; }
.msg__text.prose h2 { font-size: 1.25em; }
.msg__text.prose h3 { font-size: 1.1em; }
.msg__text.prose pre { margin: 0.5em 0; }
.msg__text.prose img { max-height: 22rem; cursor: zoom-in; }
.msg__text.prose .header-anchor { display: none; }

.msg__images {
  display: grid;
  gap: 4px;
  margin-top: 0.4rem;
  max-width: 34rem;
}
.msg__images--2 { grid-template-columns: 1fr 1fr; }
.msg__images--3 { grid-template-columns: 1fr 1fr 1fr; }
.msg__images a { display: block; background: var(--bg-soft); }
.msg__images img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 24rem;
  object-fit: contain;
  cursor: zoom-in;
}
.msg__images--2 img, .msg__images--3 img { aspect-ratio: 1; height: 100%; object-fit: cover; }

.chat-jump {
  position: absolute;
  left: 50%;
  bottom: 6.5rem;
  transform: translateX(-50%);
  z-index: 10;
  background: var(--ink);
  color: var(--bg);
  border: none;
  border-radius: 2px;
  padding: 0.4rem 0.8rem;
  font-family: var(--font-mono);
  font-size: 12px;
}
.chat-jump:hover { background: var(--accent); color: var(--accent-ink); }

.chat-typing {
  max-width: 52rem;
  width: 100%;
  margin: 0 auto;
  padding: 0 var(--pad);
  min-height: 1.3rem;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-soft);
}

/* ---------- composer ---------- */

.chat-foot {
  border-top: var(--rule-w) solid var(--rule);
  padding: 0.6rem var(--pad) max(0.6rem, env(safe-area-inset-bottom));
}
.chat-foot > * { max-width: 52rem; margin: 0 auto; }

.chat-join { display: flex; gap: 0.5rem; align-items: center; }
.chat-join[hidden], .chat-compose[hidden] { display: none; }
.chat-join__avatar { padding: 0; border: none; background: none; cursor: pointer; flex: none; }
.chat-join__avatar:hover { outline: 2px solid var(--accent); }
.chat-join__input, .chat-compose__text {
  flex: 1;
  min-width: 0;
  background: var(--bg);
  border: var(--rule-w) solid var(--rule);
  border-radius: 2px;
  padding: 0.5rem 0.7rem;
}
.chat-join__input { font-family: var(--font-mono); font-size: 14px; }
.chat-join__input:focus, .chat-compose__text:focus { outline: none; border-color: var(--ink-soft); }

.chat-compose__row { display: flex; gap: 0.35rem; align-items: flex-end; }
.chat-compose__text {
  font-family: var(--font-serif);
  font-size: 17px;
  line-height: 1.45;
  resize: none;
  max-height: 40vh;
}
.chat-attach, .chat-send { padding: 0.55rem; }
.chat-send:not(:disabled) { color: var(--ink); }
.chat-compose__files { display: flex; gap: 0.4rem; flex-wrap: wrap; margin-bottom: 0.5rem; }
.chat-compose__files[hidden] { display: none; }
.chat-file { position: relative; width: 4rem; height: 4rem; background: var(--bg-soft); }
.chat-file img { width: 100%; height: 100%; object-fit: cover; display: block; }
.chat-file.is-uploading img { opacity: 0.35; }
.chat-file.is-uploading::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 3px;
  width: 40%;
  background: var(--accent);
  animation: chat-upload 900ms ease-in-out infinite alternate;
}
@keyframes chat-upload { from { left: 0; } to { left: 60%; } }
.chat-file__x {
  position: absolute;
  top: 2px;
  right: 2px;
  width: 1.3rem;
  height: 1.3rem;
  line-height: 1;
  padding: 0;
  border: none;
  border-radius: 2px;
  background: var(--ink);
  color: var(--bg);
  font-size: 14px;
}
.chat-compose__error {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--danger);
  margin-top: 0.4rem;
}
.chat-gone { font-family: var(--font-mono); font-size: 13px; color: var(--ink-soft); text-align: center; padding: 0.4rem 0; }

body.is-dropping .chat-log { outline: 2px dashed var(--accent); outline-offset: -8px; }

/* ---------- small screens ---------- */

@media (max-width: 640px) {
  :root { --pad: 0.9rem; }
  .chat-bar { gap: 0.5rem; flex-wrap: wrap; row-gap: 0.1rem; }
  .chat-bar__home span { display: none; }
  .chat-bar__title { flex: 1; }
  .chat-bar__meta { order: 3; width: 100%; margin-left: 0; font-size: 11px; gap: 0.7rem; }
  .chat-share span { display: none; }
  .chat-share { padding: 0.45rem 0.55rem; }
  .chat-people { top: 4.4rem; }
  .msg { grid-template-columns: 1.9rem minmax(0, 1fr); gap: 0.65rem; }
  .msg__avatar .avatar { width: 30px; height: 30px; }
  .chat-sys { margin-left: 2.55rem; }
  .msg__text.prose { font-size: 16px; }
  .chat-compose__text { font-size: 16px; }
  .chat-jump { bottom: 7.5rem; }
}