:root {
  --bg: #f6f7fb;
  --panel: #ffffff;
  --ink: #1c2333;
  --muted: #7a8295;
  --accent: #5b6cff;
  --accent-ink: #ffffff;
  --bubble-me: #5b6cff;
  --bubble-them: #eef0f6;
  --radius: 18px;
  --border: #e7e9f0;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

button {
  font: inherit;
  cursor: pointer;
  border: none;
  border-radius: 999px;
  padding: 10px 18px;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 600;
  white-space: nowrap;
  line-height: 1.2;
}
button.secondary {
  background: var(--bubble-them);
  color: var(--ink);
}
button:disabled { opacity: 0.5; cursor: default; }

input, textarea {
  font: inherit;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 14px;
  background: #fff;
  color: var(--ink);
  width: 100%;
}
input:focus, textarea:focus { outline: 2px solid var(--accent); border-color: transparent; }

/* ---- centered card layout (join / fallback) ---- */
.center {
  min-height: 100%;
  display: grid;
  place-items: center;
  padding: 24px;
}
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 28px;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 12px 40px rgba(20, 30, 80, 0.06);
}
.card h1 { margin: 0 0 6px; font-size: 24px; }
.card p { margin: 0 0 18px; color: var(--muted); }
.card .row { display: flex; gap: 10px; margin-top: 14px; }

/* ---- chat ---- */
.chat {
  display: flex;
  flex-direction: column;
  height: 100%;
  max-width: 720px;
  margin: 0 auto;
  background: var(--panel);
  border-left: 1px solid var(--border);
  border-right: 1px solid var(--border);
  position: relative; /* anchors the drag-and-drop overlay */
}
.chat header {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--panel);
}
.chat header .title {
  font-weight: 700;
  font-size: 17px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  padding-right: 10px;
}

/* kebab settings menu */
.icon-btn {
  background: transparent;
  color: var(--ink);
  font-size: 22px;
  line-height: 1;
  padding: 4px 10px;
  border-radius: 10px;
}
.icon-btn:hover { background: var(--bubble-them); }
.menu-wrap { position: relative; flex: none; }
.menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 12px 40px rgba(20, 30, 80, 0.14);
  min-width: 230px;
  padding: 6px;
  z-index: 20;
}
.menu-who {
  font-size: 12px;
  color: var(--muted);
  padding: 8px 12px 6px;
}
.menu-item {
  display: block;
  width: 100%;
  text-align: left;
  background: transparent;
  color: var(--ink);
  border-radius: 10px;
  padding: 10px 12px;
  font-weight: 500;
  white-space: normal;
}
.menu-item:hover { background: var(--bubble-them); }
.menu-item.danger { color: #c2410c; }
.menu-item.disabled,
.menu-item.disabled:hover { color: var(--muted); cursor: default; background: transparent; }

.feed-wrap {
  position: relative;
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}
#feed {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
/* push a few messages to the bottom (near the composer); scrolls normally when full */
#feed::before {
  content: "";
  margin-top: auto;
}
.msg { display: flex; flex-direction: column; max-width: 78%; margin-top: 10px; }
.msg .name { font-size: 12px; color: var(--muted); margin: 0 6px 3px; }
.msg .bubble {
  padding: 9px 13px;
  border-radius: var(--radius);
  background: var(--bubble-them);
  line-height: 1.35;
  word-wrap: break-word;
  white-space: pre-wrap;
}
.msg.me { align-self: flex-end; align-items: flex-end; }
.msg.me .bubble { background: var(--bubble-me); color: #fff; border-bottom-right-radius: 6px; }
.msg.them .bubble { border-bottom-left-radius: 6px; }
.msg .bubble a { color: inherit; text-decoration: underline; text-underline-offset: 2px; }
.msg .time { font-size: 11px; color: var(--muted); margin: 3px 6px 0; }

/* message content (text bubble + any attachments) */
.content {
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: flex-start;
  min-width: 0;
}
.msg.me .content { align-items: flex-end; }

/* inline attachments */
.msg-image-wrap { max-width: 240px; }
.msg-image {
  max-width: 100%;
  max-height: 320px;
  border-radius: var(--radius);
  display: block;
  background: var(--bubble-them);
  cursor: zoom-in;
}

/* full-screen image viewer */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 80;
  background: rgba(0, 0, 0, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.lightbox img { max-width: 100%; max-height: 100%; border-radius: 8px; }
.lightbox-close {
  position: fixed;
  top: 14px;
  right: 16px;
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.lightbox-close svg { width: 20px; height: 20px; }

/* drag-and-drop overlay */
.drop-overlay {
  position: absolute;
  inset: 0;
  z-index: 40;
  background: rgba(91, 108, 255, 0.12);
  border: 3px dashed var(--accent);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 18px;
  color: var(--accent);
  pointer-events: none;
}
.file-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--bubble-them);
  color: var(--ink);
  padding: 10px 14px;
  border-radius: var(--radius);
  text-decoration: none;
  font-size: 14px;
  max-width: 260px;
  word-break: break-word;
}
.msg.me .file-chip { background: var(--bubble-me); color: #fff; }

/* link (OpenGraph) preview card */
.link-preview {
  display: flex;
  flex-direction: column;
  max-width: 280px;
  background: var(--bubble-them);
  color: var(--ink);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  text-decoration: none;
}
.msg.me .link-preview {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.25);
}
.lp-image { width: 100%; max-height: 150px; object-fit: cover; display: block; }
.lp-body { padding: 8px 11px; }
.lp-title { font-weight: 600; font-size: 14px; line-height: 1.3; }
.lp-desc {
  font-size: 12px;
  color: var(--muted);
  margin-top: 2px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.lp-host { font-size: 11px; color: var(--muted); margin-top: 5px; }
.msg.me .lp-desc,
.msg.me .lp-host { color: rgba(255, 255, 255, 0.82); }

/* composer attachment preview */
.composer-preview { padding: 10px 14px 0; }
.preview-chip {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bubble-them);
  border-radius: 12px;
  padding: 6px 34px 6px 8px;
  max-width: 100%;
}
.preview-chip img { width: 40px; height: 40px; object-fit: cover; border-radius: 8px; }
.preview-file { font-size: 24px; }
.preview-name {
  font-size: 13px;
  color: var(--ink);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 220px;
}
.preview-remove {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--ink);
  color: #fff;
  width: 22px;
  height: 22px;
  padding: 0;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.preview-remove svg { width: 13px; height: 13px; }

/* reactions */
.bubble-row { display: flex; align-items: center; gap: 6px; max-width: 100%; min-width: 0; }
.msg.me .bubble-row { flex-direction: row-reverse; }
/* Text selection works everywhere now: desktop reacts with a stationary hold
   (drag-select cancels it) and touch reacts with a double-tap, so long-press is
   free for native selection/copy on mobile. */
.reactions { display: flex; flex-wrap: wrap; gap: 4px; margin: 3px 2px 0; }
.msg.me .reactions { justify-content: flex-end; }
.reactions:empty { display: none; }
.reaction-chip {
  background: var(--bubble-them);
  color: var(--ink);
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 2px 9px;
  font-size: 13px;
  font-weight: 500;
  line-height: 1.35;
}
.reaction-chip.mine { border-color: var(--accent); background: #e7eaff; }
.emoji-picker {
  position: fixed;
  display: flex;
  gap: 2px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 6px;
  box-shadow: 0 12px 40px rgba(20, 30, 80, 0.18);
  z-index: 60;
}
.emoji-opt {
  background: transparent;
  font-size: 22px;
  padding: 4px 6px;
  border-radius: 50%;
  line-height: 1;
}
.emoji-opt:hover { background: var(--bubble-them); }

.composer {
  display: flex;
  gap: 8px;
  padding: 14px;
  border-top: 1px solid var(--border);
  background: var(--panel);
  align-items: flex-end;
}
.composer-field {
  position: relative;
  flex: 1;
  display: flex;
}
.composer textarea {
  flex: 1;
  resize: none;
  max-height: 140px;
  /* 8+8 padding + 22 line + 2 border = 40px at rest, matching .attach-btn */
  padding: 8px 46px 8px 14px; /* right room for the inline send button */
  line-height: 22px;
  min-height: 40px;
  border-radius: 20px;
  font-family: inherit;
  overflow: hidden;
}
/* circular up-arrow send button, tucked into the bottom-right of the field */
.send-btn {
  position: absolute;
  right: 4px;
  bottom: 3px;
  width: 34px;
  height: 34px;
  padding: 0;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  color: #fff;
}
.send-btn[hidden] { display: none; }
/* left-side attach (＋) button */
.attach-btn {
  flex: none;
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--bubble-them);
  color: var(--ink);
  font-size: 24px;
  line-height: 1;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 50;
  background: rgba(20, 30, 80, 0.45);
  overflow: auto;
}

/* input + button on one row (e.g. Create invite) */
.inline-form {
  display: flex;
  gap: 10px;
  align-items: stretch;
}
.inline-form input {
  flex: 1;
  min-width: 0;
}

.banner {
  text-align: center;
  font-size: 13px;
  color: var(--muted);
  padding: 6px;
}
.banner.warn { color: #b4530a; }

/* connection status as a floating pill so it never reflows the message list */
#banner {
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 6;
  padding: 5px 14px;
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  box-shadow: 0 6px 20px rgba(20, 30, 80, 0.18);
  pointer-events: none;
  white-space: nowrap;
}
#banner.warn { background: #b4530a; color: #fff; }

/* ---- admin ---- */
.admin { max-width: 760px; margin: 0 auto; padding: 24px; }
.admin h1 { margin: 0 0 4px; }
.admin .sub { color: var(--muted); margin: 0 0 24px; }
.admin section {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 18px;
  margin-bottom: 18px;
}
.admin section h2 { margin: 0 0 12px; font-size: 16px; }
.invite {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 0;
  border-top: 1px solid var(--border);
}
.invite:first-of-type { border-top: none; }
.invite .meta { flex: 1; min-width: 0; }
.invite .meta .label { font-weight: 600; }
.invite .meta .status { font-size: 12px; color: var(--muted); }
.invite .status.revoked { color: #c2410c; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12px; }
.key-box {
  background: var(--bubble-them);
  border-radius: 12px;
  padding: 12px;
  word-break: break-all;
  margin: 10px 0;
}
.hidden { display: none !important; }
.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%);
  background: var(--ink); color: #fff; padding: 10px 16px; border-radius: 999px;
  font-size: 14px; opacity: 0; transition: opacity .2s; pointer-events: none;
}
.toast.show { opacity: 1; }

.header-actions { display: flex; gap: 8px; align-items: center; }
.notif {
  background: var(--bubble-them);
  color: var(--ink);
  font-size: 13px;
  font-weight: 600;
  padding: 7px 12px;
  white-space: nowrap;
}

/* full-screen onboarding cards */
.card.onboard { text-align: center; }
.card.onboard .row { justify-content: center; }
.card.onboard p { margin-bottom: 14px; }
.onboard-icon { font-size: 46px; line-height: 1; margin-bottom: 10px; }
.steps {
  text-align: left;
  color: var(--muted);
  line-height: 1.6;
  padding-left: 20px;
  margin: 4px 0 18px;
}
.steps li { margin-bottom: 6px; }
.steps strong { color: var(--ink); }