/* Design tokens: black, white, one soft gray. Pill buttons, flat
   zero-radius containers, no drop shadows. Red is used for error text only. */
:root {
  --ink: #111111;
  --canvas: #ffffff;
  --soft-cloud: #f5f5f5;
  --charcoal: #39393b;
  --mute: #707072;
  --stone: #9e9ea0;
  --hairline: #cacacb;
  --hairline-soft: #e5e5e5;
  --error: #d30005;
  --error-on-dark: #ff6b6b;

  --radius-pill: 30px;   /* every button */
  --radius-field: 24px;  /* inputs */
  --radius-bubble: 20px; /* chat bubbles */

  --font-display: "Anton", "Arial Narrow", Impact, sans-serif;
  --font-sans: "Archivo", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-shutter: cubic-bezier(0.76, 0, 0.24, 1);

  /* Login content starts animating as the shutter uncovers it; 0 once the intro is over. */
  --intro-delay: 1.45s;
  --navbar-height: 60px;
  --z-toast: 10;
  --z-intro: 20;
  color-scheme: light;
}

:root.intro-done { --intro-delay: 0s; }

* { box-sizing: border-box; }

body {
  margin: 0;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

main { flex: 1; min-height: 0; }
h1, h2, h3 { margin: 0; font-weight: 500; line-height: 1.2; }
.hidden, [hidden] { display: none !important; }
.muted { color: var(--mute); }
.small { font-size: 14px; }
.page-width { width: 100%; max-width: 1440px; margin: 0 auto; padding: 0 clamp(16px, 4vw, 48px); }

/* ---------- Buttons: pill or nothing ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 28px;
  border: 0;
  border-radius: var(--radius-pill);
  background: var(--soft-cloud);
  color: var(--ink);
  font: inherit;
  font-weight: 500;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 0.2s, opacity 0.2s, transform 0.15s var(--ease-out);
}
.btn:hover:not(:disabled) { background: var(--hairline-soft); }
.btn:active:not(:disabled) { transform: scale(0.96); opacity: 0.8; }
.btn:disabled { opacity: 0.35; cursor: not-allowed; }
.btn:focus-visible, .contact:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }

.btn-primary { background: var(--ink); color: var(--canvas); }
.btn-primary:hover:not(:disabled) { background: var(--ink); opacity: 0.82; }
.btn-on-dark { background: var(--canvas); color: var(--ink); }
.btn-on-dark:hover:not(:disabled) { background: var(--soft-cloud); }
.btn-on-dark:focus-visible { outline-color: var(--canvas); }
.btn-small { height: 40px; padding: 0 18px; font-size: 14px; }
.btn-chip { height: 36px; padding: 0 16px; font-size: 14px; background: var(--canvas); box-shadow: inset 0 0 0 1px var(--hairline); }
.btn-chip:hover:not(:disabled) { background: var(--canvas); box-shadow: inset 0 0 0 1px var(--ink); }
.btn-link { height: auto; padding: 6px 8px; background: none; color: var(--mute); font-size: 14px; }
.btn-link:hover:not(:disabled) { background: none; color: var(--ink); }

/* ---------- Inputs: soft-cloud pill, white with an ink ring on focus ---------- */

input {
  width: 100%;
  min-width: 0; /* inputs have a built-in minimum width; let them shrink inside flex rows */
  height: 48px;
  padding: 0 20px;
  border: 0;
  border-radius: var(--radius-field);
  background: var(--soft-cloud);
  color: var(--ink);
  font: inherit;
  transition: background-color 0.2s, box-shadow 0.2s;
}
input::placeholder { color: var(--mute); }
input:focus { outline: none; background: var(--canvas); box-shadow: inset 0 0 0 2px var(--ink), 0 0 0 6px var(--soft-cloud); }
input:disabled { color: var(--stone); cursor: not-allowed; }

/* ---------- Logo ---------- */

.logo-mark { width: 32px; height: 16px; overflow: visible; }
.logo-node { fill: currentColor; }
.logo-link { fill: none; stroke: currentColor; stroke-width: 2.5; stroke-linecap: round; }

/* ---------- Intro: logo draws, then the shutter rolls up ---------- */

.intro {
  position: fixed;
  inset: 0;
  z-index: var(--z-intro);
  display: grid;
  place-items: center;
  background-color: var(--ink);
  color: var(--canvas);
  /* Horizontal slats of a rolling shop shutter. */
  background-image: repeating-linear-gradient(
    to bottom,
    transparent 0 30px,
    rgb(255 255 255 / 0.08) 30px 31px,
    rgb(0 0 0 / 0.5) 31px 32px
  );
  cursor: pointer;
  will-change: transform;
  animation: shutter-up 0.95s var(--ease-shutter) 1.25s forwards;
}
/* Bottom rail of the shutter. */
.intro::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 20px;
  background: var(--ink);
  border-top: 1px solid rgb(255 255 255 / 0.25);
}
.shutter-handle {
  position: absolute;
  z-index: 1;
  left: 50%;
  bottom: 6px;
  width: 64px;
  height: 6px;
  margin-left: -32px;
  border-radius: 3px;
  background: rgb(255 255 255 / 0.4);
}
.intro-logo { display: flex; align-items: center; gap: 18px; }
.intro .logo-mark { width: 72px; height: 36px; }
.intro .logo-node { transform-box: fill-box; transform-origin: center; animation: pop 0.45s var(--ease-out) both; }
.intro .logo-node:nth-of-type(2) { animation-delay: 0.12s; }
.intro .logo-link { stroke-dasharray: 26; stroke-dashoffset: 26; animation: draw 0.5s var(--ease-out) 0.3s forwards; }
.intro-word {
  font-family: var(--font-display);
  font-size: 48px;
  line-height: 1;
  text-transform: uppercase;
  animation: rise 0.6s var(--ease-out) 0.5s both;
}

/* Credit line, fades in under the logo just before the shutter rolls up. */
.intro-credit {
  position: absolute;
  left: 0;
  right: 0;
  top: calc(50% + 48px);
  text-align: center;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--stone);
  animation: rise 0.6s var(--ease-out) 0.7s both;
}

@keyframes shutter-up {
  0% { transform: translateY(0); }
  14% { transform: translateY(8px); } /* small dip, like unlocking before it rolls up */
  100% { transform: translateY(-100%); }
}
@keyframes pop { from { opacity: 0; transform: scale(0.3); } }
@keyframes draw { to { stroke-dashoffset: 0; } }
@keyframes rise { from { opacity: 0; transform: translateY(16px); } }
@keyframes fade { from { opacity: 0; } }
@keyframes line-up { from { transform: translateY(105%); } }

/* Staggered entry: children of .reveal cascade in using their --i index. */
.reveal > * {
  animation: rise 0.7s var(--ease-out) both;
  animation-delay: calc(var(--intro-delay) + var(--i, 0) * 90ms);
}

/* ---------- Navbar ---------- */

.navbar {
  height: var(--navbar-height);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(16px, 4vw, 48px);
  background: var(--canvas);
  box-shadow: inset 0 -1px 0 var(--hairline-soft);
}
.brand { display: flex; align-items: center; gap: 12px; }
.wordmark { font-family: var(--font-display); font-size: 22px; line-height: 1; text-transform: uppercase; letter-spacing: 0.01em; }
.session { display: flex; align-items: center; gap: 12px; font-size: 14px; color: var(--mute); }
.session strong { color: var(--ink); font-weight: 500; }
/* Round icon buttons (sound, full screen). aria-pressed decides which icon shows. */
.btn-icon-small { width: 40px; height: 40px; padding: 0; border-radius: 50%; flex-shrink: 0; }
.icon { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.icon-fill { fill: currentColor; }
.btn-icon-small[aria-pressed="true"] .icon-off,
.btn-icon-small[aria-pressed="false"] .icon-on { display: none; }
#sound-btn[aria-pressed="false"] { color: var(--mute); }

/* Filled = connected to the signaling server, hollow = reconnecting. */
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--ink); border: 1.5px solid var(--ink); transition: background-color 0.3s; }
.status-dot.offline { background: transparent; }

/* ---------- Login ---------- */

.login { height: 100%; overflow-y: auto; padding: 16px 0 48px; }

/* The campaign tile: a black block with the display headline and the join form. */
.campaign {
  min-height: min(640px, calc(100dvh - var(--navbar-height) - 32px));
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 48px;
  padding: clamp(28px, 5vw, 64px);
  background: var(--ink);
  color: var(--canvas);
}
.display {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(56px, 9vw, 128px);
  line-height: 0.9;
  text-transform: uppercase;
}
/* Each headline line slides up from behind a mask. */
.display .line { display: block; overflow: hidden; padding-bottom: 0.02em; }
.display .line > span {
  display: block;
  animation: line-up 0.9s var(--ease-out) both;
  animation-delay: calc(var(--intro-delay) + var(--i, 0) * 90ms);
}

.campaign-foot {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 440px);
  gap: 32px 64px;
  align-items: end;
}
/* Two-tone lede: the key sentence in white, the rest in gray. */
.lede {
  margin: 0;
  max-width: 30ch;
  font-size: clamp(19px, 1.9vw, 25px);
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: -0.015em;
  color: var(--stone);
  text-wrap: pretty;
}
.lede-strong { color: var(--canvas); }
.login-form { display: grid; gap: 8px; }
.login-form label, .step-tag, .sidebar-note, .link-label, .day-divider,
.notice-title, .my-code-label, .add-form label {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.field-row { display: flex; gap: 8px; }
.field-row input:focus { box-shadow: inset 0 0 0 2px var(--ink), 0 0 0 3px var(--canvas); }
.helper { margin: 0; font-family: var(--font-display); font-size: 14px; color: var(--stone); }
.helper-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.btn-link-dark { color: var(--canvas); text-decoration: underline; text-underline-offset: 3px; padding-inline: 0; }
.btn-link-dark:hover:not(:disabled) { color: var(--hairline); }

/* Privacy disclaimer under the join form. */
.notice {
  display: grid;
  gap: 6px;
  margin-top: 4px;
  padding: 16px 18px;
  box-shadow: inset 0 0 0 1px rgb(255 255 255 / 0.22);
  font-size: 14px;
  color: var(--hairline);
}
.notice p { margin: 0; }
.notice-title { color: var(--canvas); }
.notice-code { font-family: var(--font-display); font-size: 14px; color: var(--stone); }
.notice-code strong { margin-left: 6px; color: var(--canvas); font-weight: 500; letter-spacing: 0.06em; }
.error { margin: 0; min-height: 21px; font-size: 14px; color: var(--error); }
.campaign .error { color: var(--error-on-dark); }

.how { padding: 48px 0 0; }
.how h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(40px, 5vw, 72px);
  line-height: 0.9;
  text-transform: uppercase;
  margin-bottom: 24px;
}
/* Four flat black tiles. */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.step {
  min-height: 260px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 40px;
  padding: 24px;
  background: var(--ink);
  color: var(--canvas);
}
.step-tag { display: flex; align-items: center; justify-content: space-between; color: var(--stone); }
.step h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(32px, 3vw, 44px);
  line-height: 0.95;
  text-transform: uppercase;
}
.step p { margin: 10px 0 0; font-size: 15px; color: var(--stone); max-width: 30ch; }
.step .logo-mark { color: var(--canvas); width: 40px; height: 20px; }
.step .logo-link { stroke-dasharray: 26; stroke-dashoffset: 26; animation: draw 0.8s var(--ease-out) forwards; animation-delay: calc(var(--intro-delay) + 900ms); }

/* ---------- App layout ---------- */

.app { height: 100%; display: grid; grid-template-columns: 320px 1fr; animation: fade 0.4s var(--ease-out); }

.sidebar { overflow-y: auto; padding: 24px 0; box-shadow: inset -1px 0 0 var(--hairline-soft); }
/* Your friend code: a black card at the top of the sidebar. */
.my-code { display: grid; gap: 8px; margin: 0 16px 16px; padding: 18px 20px; background: var(--ink); color: var(--canvas); }
.my-code-label { color: var(--stone); font-size: 13px; }
.my-code-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.my-code-value { font-family: var(--font-display); font-size: 26px; font-weight: 500; letter-spacing: 0.06em; line-height: 1.1; }
.my-code-hint { margin: 0; font-size: 13px; color: var(--stone); }

.add-form { display: grid; gap: 8px; margin: 0 16px 20px; }
.add-form label { color: var(--mute); font-size: 13px; padding-left: 4px; }
.add-form input { height: 40px; font-family: var(--font-display); letter-spacing: 0.08em; text-transform: uppercase; }
.add-form input::placeholder { letter-spacing: 0.08em; }
.add-form .error { min-height: 0; padding-left: 4px; }
.add-form .error:empty { display: none; }

.sidebar h2 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 24px 12px;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 26px;
  line-height: 1;
  text-transform: uppercase;
}
.sidebar h2 + .list { margin-bottom: 36px; }
.count {
  display: inline-grid;
  place-items: center;
  min-width: 24px;
  height: 22px;
  padding: 0 7px;
  border-radius: 11px;
  background: var(--ink);
  color: var(--canvas);
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}
.sidebar-note { margin: -6px 24px 12px; color: var(--mute); font-size: 13px; }

.list { list-style: none; margin: 0; padding: 0; }
.list-empty { padding: 8px 24px; font-size: 14px; color: var(--mute); }

.contact {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 24px;
  cursor: pointer;
  transition: background-color 0.2s;
}
.contact:hover { background: var(--soft-cloud); }
.contact.active { background: var(--soft-cloud); box-shadow: inset 3px 0 0 var(--ink); }
.contact-text { flex: 1; min-width: 0; display: grid; }
.contact-text strong { font-weight: 500; }
.contact-sub { font-size: 14px; color: var(--mute); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.avatar {
  position: relative;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--soft-cloud);
  color: var(--ink);
  font-weight: 600;
}
.contact.active .avatar { background: var(--canvas); }
.online-dot {
  position: absolute;
  right: -1px;
  bottom: -1px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--canvas);
}

/* ---------- Chat panel ---------- */

.chat-panel { min-width: 0; min-height: 0; display: flex; flex-direction: column; }

.empty-state { margin: auto; max-width: 400px; padding: 24px 16px; text-align: center; animation: rise 0.6s var(--ease-out) both; }
.empty-mark { width: 64px; height: 32px; margin-bottom: 24px; }
.empty-state h2 { font-family: var(--font-display); font-weight: 400; font-size: 48px; line-height: 0.9; text-transform: uppercase; margin-bottom: 12px; }
.empty-state p { margin: 0; color: var(--mute); }

.conversation { flex: 1; min-height: 0; display: flex; flex-direction: column; }

.chat-header {
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding: 12px 24px;
  box-shadow: inset 0 -1px 0 var(--hairline-soft);
}
/* Scanning bar while waiting for a reply, connecting or reconnecting. */
.conversation[data-status="requesting"] .chat-header::after,
.conversation[data-status="connecting"] .chat-header::after,
.conversation[data-status="reconnecting"] .chat-header::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 30%;
  height: 2px;
  background: var(--ink);
  animation: scan 1.2s var(--ease-shutter) infinite;
}
@keyframes scan { from { transform: translateX(-100%); } to { transform: translateX(340%); } }

.chat-header .avatar { width: 44px; height: 44px; background: var(--ink); color: var(--canvas); font-size: 17px; }
.chat-title { flex: 1; min-width: 140px; display: grid; gap: 2px; }
.chat-name-row { display: flex; align-items: baseline; gap: 10px; min-width: 0; }
.chat-title strong { font-weight: 600; font-size: 18px; line-height: 1.2; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chat-code { font-family: var(--font-display); font-size: 14px; letter-spacing: 0.06em; color: var(--mute); white-space: nowrap; }
#chat-status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mute);
}
/* Live indicator: a pulsing dot while the direct link is up. */
.conversation[data-status="connected"] #chat-status { color: var(--ink); }
.conversation[data-status="connected"] #chat-status::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ink);
  animation: pulse 1.8s ease-in-out infinite;
}
@keyframes pulse { 50% { opacity: 0.25; } }

/* Connection strip: real stats read from WebRTC, refreshed every 2 seconds. */
.link-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  background: var(--ink);
  color: var(--canvas);
  animation: fade 0.4s var(--ease-out);
}
.link-cell { display: grid; gap: 2px; min-width: 0; padding: 10px 24px 11px; }
.link-cell + .link-cell { box-shadow: inset 1px 0 0 rgb(255 255 255 / 0.14); }
.link-label { color: var(--stone); font-size: 12px; }
.link-value { font-family: var(--font-display); font-size: 15px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
/* The action group stays on one line; the header wraps it below the name when space runs out. */
.chat-actions { display: flex; align-items: center; gap: 10px; }

/* Segmented pill: secondary tools share one soft-cloud track; the hovered one lifts to white. */
.action-group {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  height: 40px;
  padding: 4px;
  border-radius: var(--radius-pill);
  background: var(--soft-cloud);
}
.btn.seg {
  height: 32px;
  padding: 0 14px;
  border-radius: 26px;
  background: transparent;
  color: var(--charcoal);
  font-size: 13px;
  transition: background-color 0.2s, color 0.2s, box-shadow 0.2s, transform 0.15s var(--ease-out);
}
.btn.seg:hover:not(:disabled) { background: var(--canvas); color: var(--ink); box-shadow: 0 1px 2px rgb(17 17 17 / 0.08); }
.btn.seg-danger:hover:not(:disabled) { color: var(--error); }

/* Outlined pill for ending or cancelling: quiet until hovered, then fills black. */
.btn-outline { background: var(--canvas); box-shadow: inset 0 0 0 1.5px var(--ink); }
.btn-outline:hover:not(:disabled) { background: var(--ink); color: var(--canvas); }
.back-btn { display: none; font-size: 20px; color: var(--ink); }

/* The chat area: an animated background layer with the scrolling message list on top. */
.chat-stage { position: relative; flex: 1; min-height: 0; display: flex; overflow: hidden; background: var(--soft-cloud); }
.chat-bg { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
/* Dot grid drifting diagonally. It moves exactly one grid cell per loop, so the loop is seamless. */
.chat-bg::before {
  content: "";
  position: absolute;
  inset: -24px;
  background-image: radial-gradient(circle, var(--hairline) 1px, transparent 1.4px);
  background-size: 24px 24px;
  opacity: 0.6;
  animation: grid-drift 18s linear infinite;
}
@keyframes grid-drift { to { transform: translate(24px, 24px); } }
/* Faint logo in the middle of the chat. */
.chat-bg-mark {
  position: absolute;
  top: 50%;
  left: 50%;
  width: min(420px, 70%);
  transform: translate(-50%, -50%);
  color: var(--ink);
  opacity: 0.05;
}
/* While connected, packets travel along the link in both directions: the direct connection at work. */
.packet { fill: var(--ink); opacity: 0; }
.conversation[data-status="connected"] .chat-bg-mark { opacity: 0.08; transition: opacity 0.6s; }
.conversation[data-status="connected"] .packet-out { animation: packet-out 2.4s var(--ease-shutter) infinite; }
.conversation[data-status="connected"] .packet-in { animation: packet-in 2.4s var(--ease-shutter) 1.2s infinite; }
@keyframes packet-out {
  0% { opacity: 0; transform: translateX(0); }
  15%, 85% { opacity: 1; }
  100% { opacity: 0; transform: translateX(26px); }
}
@keyframes packet-in {
  0% { opacity: 0; transform: translateX(0); }
  15%, 85% { opacity: 1; }
  100% { opacity: 0; transform: translateX(-26px); }
}

.messages {
  position: relative;
  flex: 1;
  overflow-y: auto;
  list-style: none;
  margin: 0;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.chat-empty { margin: auto; display: grid; gap: 8px; text-align: center; max-width: 320px; animation: rise 0.5s var(--ease-out) both; }
.chat-empty strong { font-family: var(--font-display); font-weight: 400; font-size: 44px; line-height: 0.95; text-transform: uppercase; }
.chat-empty span { font-size: 14px; color: var(--mute); }

.day-divider { display: flex; align-items: center; gap: 12px; margin: 12px 0 4px; color: var(--mute); font-size: 13px; }
.day-divider::before, .day-divider::after { content: ""; flex: 1; height: 1px; background: var(--hairline); }
.day-divider:first-child { margin-top: 0; }

.bubble { max-width: min(70%, 520px); padding: 10px 16px 8px; border-radius: var(--radius-bubble); }
.bubble p { margin: 0; white-space: pre-wrap; overflow-wrap: anywhere; }
.bubble time { display: block; margin-top: 3px; font-family: var(--font-display); font-size: 12px; font-variant-numeric: tabular-nums; opacity: 0.55; text-align: right; }
.bubble.mine { align-self: flex-end; background: var(--ink); color: var(--canvas); border-bottom-right-radius: 6px; transform-origin: bottom right; }
.bubble.theirs { align-self: flex-start; background: var(--canvas); border-bottom-left-radius: 6px; transform-origin: bottom left; }
/* Grouped messages: tight spacing, the "tail" corner only on the last one, time only on the last one. */
.bubble.continued { margin-top: -4px; }
.bubble.mine.continued { border-top-right-radius: 6px; }
.bubble.theirs.continued { border-top-left-radius: 6px; }
.bubble.mine.has-next { border-bottom-right-radius: 6px; }
.bubble.theirs.has-next { border-bottom-left-radius: 6px; }
.bubble.has-next time { display: none; }
.bubble.is-new { animation: bubble-in 0.35s var(--ease-out) both; }

/* Quote of the message being replied to; tap it to jump to the original. */
.bubble { position: relative; }
.reply-quote {
  display: grid;
  gap: 1px;
  width: 100%;
  margin: 0 0 6px;
  padding: 6px 10px;
  border: 0;
  border-radius: 10px;
  background: color-mix(in srgb, currentColor 10%, transparent);
  box-shadow: inset 3px 0 0 currentColor;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}
.reply-quote strong { font-size: 12px; font-weight: 600; }
.reply-quote span { min-width: 0; font-size: 13px; opacity: 0.75; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.media-bubble .reply-quote { width: auto; margin: 4px 4px 6px; }

/* Reply and delete buttons beside a message, shown on hover. Touch screens swipe to
   reply and long-press for the menu instead. */
.msg-actions {
  position: absolute;
  top: 50%;
  display: flex;
  gap: 4px;
  transform: translateY(-50%);
  opacity: 0;
  transition: opacity 0.15s 0.1s;
}
.bubble.mine .msg-actions { right: calc(100% + 8px); }
.bubble.theirs .msg-actions { left: calc(100% + 8px); }
.bubble:hover .msg-actions, .msg-actions:focus-within { opacity: 1; transition-delay: 0s; }
.msg-btn {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: var(--canvas);
  color: var(--ink);
  box-shadow: 0 1px 3px rgb(17 17 17 / 0.14);
  cursor: pointer;
}
.msg-btn:hover { background: var(--ink); color: var(--canvas); }
.msg-btn .icon { width: 15px; height: 15px; }
@media (hover: none) {
  .msg-actions { display: none; }
  /* No text-selection highlight while holding a message for the menu. */
  .bubble { -webkit-user-select: none; user-select: none; -webkit-touch-callout: none; }
}

/* Message menu (long press / delete button). */
.message-menu { width: min(340px, calc(100vw - 32px)); padding: 20px; }
.message-menu-preview {
  margin: 0 0 14px;
  padding: 10px 14px;
  border-radius: 12px;
  background: var(--soft-cloud);
  color: var(--mute);
  font-size: 14px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.menu { display: grid; gap: 2px; }
.menu-item {
  height: 46px;
  padding: 0 14px;
  border: 0;
  border-radius: 12px;
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  transition: background-color 0.15s;
}
.menu-item:hover:not(:disabled) { background: var(--soft-cloud); }
.menu-item:disabled { color: var(--stone); cursor: not-allowed; }
.menu-danger:not(:disabled) { color: var(--error); }
.menu-item:last-child { margin-top: 6px; box-shadow: inset 0 1px 0 var(--hairline-soft); border-radius: 0 0 12px 12px; }

/* Briefly outline a message after jumping to it from a reply quote. */
.bubble.flash { animation: flash 1.4s var(--ease-out); }
@keyframes flash { 0%, 45% { box-shadow: 0 0 0 4px var(--stone); } 100% { box-shadow: 0 0 0 4px transparent; } }

/* "Typing" with dots that fill in one by one. */
.peer-typing #chat-status::after {
  content: "...";
  display: inline-block;
  width: 0;
  overflow: hidden;
  vertical-align: bottom;
  animation: typing-dots 1.2s steps(4) infinite;
}
@keyframes typing-dots { to { width: 1.25em; } }

/* Photo/video being sent or received. */
.file-bubble { display: grid; gap: 6px; min-width: min(260px, 70vw); padding: 14px 16px 12px; }
.file-kind { font-family: var(--font-display); font-size: 12px; font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase; opacity: 0.6; }
.file-name { font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.progress { display: block; height: 4px; overflow: hidden; border-radius: 2px; background: color-mix(in srgb, currentColor 22%, transparent); }
.progress-fill { display: block; height: 100%; background: currentColor; transform: scaleX(0); transform-origin: left; transition: transform 0.2s linear; }
.progress-label { font-family: var(--font-display); font-size: 13px; font-variant-numeric: tabular-nums; opacity: 0.7; }
.file-footer { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.btn.file-cancel {
  height: 28px;
  padding: 0 12px;
  background: color-mix(in srgb, currentColor 14%, transparent);
  color: inherit;
  font-size: 13px;
}
.btn.file-cancel:hover:not(:disabled) { background: color-mix(in srgb, currentColor 24%, transparent); }

/* Finished photo/video. */
.media-bubble { padding: 4px; }
.media {
  display: block;
  max-width: min(320px, 100%);
  max-height: 360px;
  border-radius: 16px;
  background: var(--soft-cloud);
}
img.media { cursor: zoom-in; }
.media-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 10px 4px;
  font-family: var(--font-display);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}
.media-meta span { opacity: 0.6; }
.media-meta time { margin: 0 0 0 auto; }
.media-save { color: inherit; font-weight: 500; text-underline-offset: 3px; }

/* Highlight the chat while a file is dragged over it. */
.messages.drop-target { box-shadow: inset 0 0 0 2px var(--ink); }

/* Round attach button, per the design system's circular icon button. */
.btn-icon { flex-shrink: 0; width: 48px; padding: 0; border-radius: 50%; font-size: 24px; font-weight: 400; line-height: 1; }

.media-dialog { max-width: 100vw; max-height: 100dvh; padding: 0; border: 0; background: transparent; }
.media-dialog[open] { display: grid; justify-items: center; gap: 12px; animation: fade 0.25s var(--ease-out); }
.media-dialog::backdrop { background: rgb(17 17 17 / 0.9); }
.media-dialog img { max-width: 92vw; max-height: 82dvh; }
@keyframes bubble-in { from { opacity: 0; transform: translateY(10px) scale(0.96); } }

.composer { display: grid; grid-template-columns: minmax(0, 1fr); gap: 8px; padding: 14px 24px 10px; box-shadow: inset 0 1px 0 var(--hairline-soft); }
.composer-row { display: flex; gap: 8px; }
.composer-meta {
  display: flex;
  justify-content: flex-end;
  padding: 0 20px;
  font-family: var(--font-display);
  font-size: 13px;
  color: var(--mute);
}
#char-count { font-variant-numeric: tabular-nums; }

/* "Replying to ..." bar above the input. */
.reply-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 8px 8px 14px;
  border-radius: 14px;
  background: var(--soft-cloud);
  box-shadow: inset 3px 0 0 var(--ink);
  animation: rise 0.25s var(--ease-out);
}
.reply-bar-text { flex: 1; min-width: 0; display: grid; font-size: 13px; }
.reply-bar-text strong { font-weight: 600; }
.reply-preview { color: var(--mute); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.reply-bar .btn-icon-small { width: 32px; height: 32px; background: var(--canvas); font-size: 18px; }
#char-count.near-limit { color: var(--error); }

/* ---------- Dialogs & toasts: flat, zero radius ---------- */

.dialog {
  width: min(420px, calc(100vw - 32px));
  padding: 32px;
  border: 0;
  background: var(--canvas);
  color: var(--ink);
}
.dialog[open] { animation: rise 0.35s var(--ease-out); }
.dialog::backdrop { background: rgb(17 17 17 / 0.55); animation: fade 0.3s var(--ease-out); }
.dialog h3 { font-family: var(--font-display); font-weight: 400; font-size: 36px; line-height: 0.95; text-transform: uppercase; margin-bottom: 14px; }
.dialog-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 24px; }
.request-code { display: inline-block; margin: 0 0 4px; padding: 6px 14px; background: var(--soft-cloud); font-family: var(--font-display); font-size: 12px; color: var(--mute); }
.request-code strong { margin-left: 6px; color: var(--ink); font-weight: 500; letter-spacing: 0.06em; }

.safety-number {
  padding: 20px;
  background: var(--soft-cloud);
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
  word-spacing: 10px;
  text-align: center;
}

.toasts {
  position: fixed;
  left: 50%;
  bottom: 96px;
  transform: translateX(-50%);
  display: grid;
  gap: 8px;
  width: min(420px, calc(100vw - 32px));
  z-index: var(--z-toast);
}
.toast { padding: 14px 20px; background: var(--ink); color: var(--canvas); font-size: 14px; animation: rise 0.3s var(--ease-out); }

/* ---------- Responsive ---------- */

@media (max-width: 1023px) {
  .steps { grid-template-columns: repeat(2, 1fr); }
  .campaign-foot { grid-template-columns: 1fr; }
  .link-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .link-cell { padding-inline: 16px; }
  .link-cell:nth-child(3) { box-shadow: inset 0 1px 0 rgb(255 255 255 / 0.14); }
  .link-cell:nth-child(4) { box-shadow: inset 1px 1px 0 rgb(255 255 255 / 0.14); }
}

@media (max-width: 720px) {
  .session-name { display: none; }
  .session { gap: 8px; }
  .wordmark { font-size: 20px; }
  .brand { gap: 10px; }
  /* Chat header on phones: back, avatar, name and End chat on the first row;
     the tool group gets its own full-width row underneath. */
  .chat-actions { display: contents; }
  .chat-title { min-width: 0; }
  .chat-code { display: none; }
  .action-group { order: 1; flex: 1 1 100%; }
  .btn.seg { flex: 1; padding: 0 8px; }
  .chat-title strong { font-size: 17px; }
  #chat-status { font-size: 11px; letter-spacing: 0.05em; }
  /* Compact stats strip: label and value side by side, one line per cell. The left column
     (route, encryption) gets the room; the right one (latency, server copy) is short. */
  .link-strip { grid-template-columns: minmax(0, 1fr) auto; }
  .link-cell { display: flex; align-items: baseline; gap: 6px; padding: 7px 12px; }
  .link-label { flex-shrink: 0; font-size: 10px; }
  .link-value { min-width: 0; font-size: 13px; }
  .app { grid-template-columns: 1fr; }
  .chat-panel { display: none; }
  body.show-chat .sidebar { display: none; }
  body.show-chat .chat-panel { display: flex; }
  .back-btn { display: inline-flex; }
  .chat-header { padding: 10px 16px; }
  .messages { padding: 16px; }
  .composer { padding: 12px 16px 8px; }
  .step { min-height: 200px; }
  .bubble { max-width: 85%; }
  .how { padding-top: 32px; }
  .how h2 { font-size: 24px; }
  .intro-word { font-size: 36px; }
  .intro .logo-mark { width: 56px; height: 28px; }
}

@media (max-width: 599px) {
  .steps { grid-template-columns: 1fr; }
  .login { padding-top: 0; }
  .login .page-width { padding: 0; }
  .how { padding-inline: 16px; }
}

/* ---------- Reduced motion: no intro, no animation ---------- */

@media (prefers-reduced-motion: reduce) {
  .intro { display: none; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-delay: 0s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}