:root {
  --bg: #1a1a2e;
  --bg-alt: #16213e;
  --bg-input: #0f3460;
  --bubble: #22335c;
  --bubble-own: #2d4a7a;
  --text: #e0e0e0;
  --text-dim: #8a8fa8;
  --accent: #4e9af1;
  --danger: #e05c5c;
  --border: #2a2a4a;
}

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

html, body {
  height: 100%;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 15px;
  overflow: hidden;
}

.hidden {
  display: none !important;
}

#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  max-width: 900px;
  margin: 0 auto;
}

/* ---------- Top bar ---------- */
#topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

#room-name {
  font-weight: 700;
  font-size: 1.1em;
  color: var(--accent);
}

#user-count {
  margin-left: 12px;
  color: var(--text-dim);
  font-size: 0.85em;
}

.my-name {
  margin-left: 12px;
  color: var(--text-dim);
  font-size: 0.8em;
  font-style: italic;
}

#controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

#ttl-label {
  color: var(--text-dim);
  font-size: 0.85em;
}

#ttl-select {
  background: var(--bg-input);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 8px;
  font-size: 0.9em;
  cursor: pointer;
}

#clear-btn {
  background: var(--bg-input);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 0.9em;
  cursor: pointer;
  transition: background 0.15s;
}

#clear-btn:hover {
  background: var(--danger);
  color: #fff;
}

/* ---------- Messages ---------- */
#messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.message {
  max-width: 75%;
  align-self: flex-start;
  background: var(--bubble);
  border-radius: 12px 12px 12px 4px;
  padding: 8px 12px;
  word-wrap: break-word;
  overflow-wrap: anywhere;
  animation: fadein 0.15s ease-in;
}

.message.own {
  align-self: flex-end;
  background: var(--bubble-own);
  border-radius: 12px 12px 4px 12px;
}

.message.system {
  align-self: center;
  background: transparent;
  color: var(--text-dim);
  font-style: italic;
  font-size: 0.85em;
  padding: 2px 8px;
}

.message.expiring {
  opacity: 0.45;
  transition: opacity 1s linear;
}

@keyframes fadein {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.message-text {
  white-space: pre-wrap;
  line-height: 1.4;
}

.message-sender {
  display: block;
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-bottom: 2px;
}

.message-image {
  display: block;
  max-width: 280px;
  max-height: 280px;
  border-radius: 8px;
  cursor: zoom-in;
}

.message-meta {
  margin-top: 4px;
  font-size: 0.72em;
  color: var(--text-dim);
  display: flex;
  gap: 8px;
}

.message.own .message-meta {
  justify-content: flex-end;
}

.message-ttl {
  font-variant-numeric: tabular-nums;
}

.message-kill {
  background: transparent;
  color: var(--text-dim);
  border: none;
  padding: 0 2px;
  margin-left: 2px;
  font-size: 1em;
  line-height: 1;
  cursor: pointer;
}

.message-kill:hover {
  color: var(--danger);
}

/* ---------- Typing indicator ---------- */
#typing-indicator {
  padding: 0 16px 4px;
  color: var(--text-dim);
  font-size: 0.8em;
  font-style: italic;
  height: 18px;
}

/* ---------- Input bar ---------- */
#inputbar {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  padding: 12px 16px;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
}

#message-input {
  flex: 1;
  background: var(--bg-input);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 1em;
  font-family: inherit;
  resize: none;
  max-height: 140px;
  outline: none;
}

#message-input:focus {
  border-color: var(--accent);
}

#image-btn, #send-btn {
  background: var(--bg-input);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  width: 42px;
  height: 42px;
  font-size: 1.1em;
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.15s;
}

#image-btn:hover, #send-btn:hover {
  background: var(--accent);
  color: #fff;
}

/* ---------- Drop overlay ---------- */
#drop-overlay {
  position: fixed;
  inset: 0;
  background: rgba(26, 26, 46, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  pointer-events: none;
}

#drop-overlay-text {
  border: 3px dashed var(--accent);
  border-radius: 16px;
  padding: 40px 60px;
  font-size: 1.4em;
  color: var(--accent);
}

/* ---------- Image modal ---------- */
#image-modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  cursor: zoom-out;
}

#image-modal-img {
  max-width: 95vw;
  max-height: 95vh;
  border-radius: 8px;
}

/* ---------- Profile setup overlay ---------- */
.profile-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 300;
}

.profile-card {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  width: 300px;
  max-width: 90vw;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.profile-card h3 {
  font-size: 1.05em;
  text-align: center;
}

#profile-name-input {
  background: var(--bg-input);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 1em;
  font-family: inherit;
  outline: none;
}

#profile-name-input:focus {
  border-color: var(--accent);
}

#color-swatches {
  display: flex;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}

.color-swatch {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  padding: 0;
}

.color-swatch.selected {
  border-color: #fff;
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.35);
}

#profile-save-btn {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 10px;
  font-size: 1em;
  cursor: pointer;
  transition: background 0.15s;
}

#profile-save-btn:hover {
  filter: brightness(1.15);
}

/* ---------- Scrollbar ---------- */
#messages::-webkit-scrollbar {
  width: 8px;
}
#messages::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}

/* ---------- Mobile ---------- */
@media (max-width: 600px) {
  .message {
    max-width: 88%;
  }
  #ttl-label {
    display: none;
  }
  #topbar {
    padding: 10px 12px;
  }
  #inputbar {
    padding: 10px 12px;
  }
}