:root {
  --bg-page: #0b0f14;
  --bg-header: #17212b;
  --bg-chat: #0e1621;
  --bg-bubble-bot: #182533;
  --bg-bubble-user: #2b5278;
  --bg-composer: #17212b;
  --text-main: #f1f4f7;
  --text-dim: #7d8e98;
  --accent: #5eb5f7;
  --kb-bg: rgba(94, 181, 247, 0.08);
  --kb-border: rgba(94, 181, 247, 0.25);
  --radius: 12px;
  --dur: 180ms;
}

* { box-sizing: border-box; }

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

.phone {
  display: flex;
  flex-direction: column;
  height: 100dvh;
  max-width: 460px;
  margin: 0 auto;
  background: var(--bg-chat);
  box-shadow: 0 0 60px rgba(0, 0, 0, 0.6);
}

/* --- header --- */
.chat-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: var(--bg-header);
  border-bottom: 1px solid rgba(0, 0, 0, 0.4);
  z-index: 2;
}

.logo svg { display: block; }

.peer { flex: 1; min-width: 0; }

.peer-name {
  font-weight: 600;
  font-size: 15.5px;
  display: flex;
  align-items: center;
  gap: 5px;
}

.peer-status { font-size: 12.5px; color: var(--text-dim); margin-top: 1px; }
.peer-status.online { color: var(--accent); }

.header-badge {
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #ffb454;
  border: 1px solid rgba(255, 180, 84, 0.45);
  border-radius: 6px;
  padding: 3px 7px;
}

/* --- chat --- */
.chat {
  flex: 1;
  overflow-y: auto;
  padding: 14px 12px 8px;
  background:
    radial-gradient(circle at 20% 15%, rgba(94, 181, 247, 0.05), transparent 45%),
    radial-gradient(circle at 85% 70%, rgba(232, 84, 63, 0.05), transparent 45%),
    var(--bg-chat);
  scrollbar-width: thin;
  scrollbar-color: #253647 transparent;
}

.chat::-webkit-scrollbar { width: 5px; }
.chat::-webkit-scrollbar-thumb { background: #253647; border-radius: 3px; }

.day-divider { text-align: center; margin: 6px 0 12px; }
.day-divider span {
  font-size: 12px;
  color: var(--text-dim);
  background: rgba(23, 33, 43, 0.9);
  border-radius: 12px;
  padding: 4px 12px;
}

.service-note {
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--text-dim);
  background: rgba(23, 33, 43, 0.7);
  border-radius: 10px;
  padding: 10px 12px;
  margin: 0 18px 14px;
  text-align: center;
}

.inline-cmd {
  background: none;
  border: none;
  color: var(--accent);
  font: inherit;
  cursor: pointer;
  padding: 0;
}

/* --- messages --- */
.msg {
  display: flex;
  flex-direction: column;
  margin: 3px 0;
  max-width: 86%;
  animation: msg-in var(--dur) ease-out;
}

@keyframes msg-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

.msg.bot { align-self: flex-start; align-items: flex-start; }
.msg.user { align-self: flex-end; align-items: flex-end; margin-left: auto; }

.chat { display: flex; flex-direction: column; }

.bubble {
  position: relative;
  padding: 8px 12px 6px;
  border-radius: var(--radius);
  font-size: 14.5px;
  line-height: 1.45;
  word-break: break-word;
  white-space: normal;
}

.msg.bot .bubble { background: var(--bg-bubble-bot); border-bottom-left-radius: 4px; }
.msg.user .bubble { background: var(--bg-bubble-user); border-bottom-right-radius: 4px; }

.bubble .text b { font-weight: 650; }
.bubble .text i { color: #c8d3dc; }

.bubble .time {
  float: right;
  margin: 8px -4px 0 8px;
  font-size: 11px;
  color: rgba(255, 255, 255, 0.4);
}

.msg.user .bubble .time::after { content: " ✓✓"; color: #71baf5; font-size: 10px; }

.msg.flash .bubble { animation: flash var(--dur) ease-out; }
@keyframes flash {
  from { filter: brightness(1.45); }
  to { filter: none; }
}

/* --- inline keyboard --- */
.kb { display: flex; flex-direction: column; gap: 4px; margin-top: 5px; width: 100%; }
.kb-row { display: flex; gap: 4px; }

.kb-btn {
  flex: 1;
  border: 1px solid var(--kb-border);
  background: var(--kb-bg);
  color: var(--accent);
  font-size: 13.5px;
  font-family: inherit;
  padding: 8px 10px;
  border-radius: 8px;
  cursor: pointer;
  transition: background var(--dur), transform 90ms;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.kb-btn:hover { background: rgba(94, 181, 247, 0.18); }
.kb-btn:active { transform: scale(0.97); }

/* --- typing indicator --- */
.typing {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  font-size: 12.5px;
  color: var(--text-dim);
}

.typing .dots { display: inline-flex; gap: 3px; }
.typing .dots i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: blink 1.2s infinite;
}
.typing .dots i:nth-child(2) { animation-delay: 0.2s; }
.typing .dots i:nth-child(3) { animation-delay: 0.4s; }

@keyframes blink {
  0%, 60%, 100% { opacity: 0.25; transform: translateY(0); }
  30% { opacity: 1; transform: translateY(-2px); }
}

/* --- composer --- */
.composer {
  background: var(--bg-composer);
  padding: 8px 10px 10px;
  border-top: 1px solid rgba(0, 0, 0, 0.4);
}

.chips { display: flex; gap: 6px; margin-bottom: 8px; }

.chip {
  border: 1px solid rgba(94, 181, 247, 0.35);
  background: transparent;
  color: var(--accent);
  font-size: 12.5px;
  font-family: inherit;
  padding: 4px 12px;
  border-radius: 14px;
  cursor: pointer;
  transition: background var(--dur);
}
.chip:hover { background: rgba(94, 181, 247, 0.12); }

.input-row { display: flex; align-items: center; gap: 8px; }

#input {
  flex: 1;
  background: #242f3d;
  border: none;
  outline: none;
  color: var(--text-main);
  font-size: 14.5px;
  font-family: inherit;
  padding: 11px 14px;
  border-radius: 18px;
}
#input::placeholder { color: var(--text-dim); }

#send {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: none;
  border-radius: 50%;
  background: var(--accent);
  color: #0e1621;
  cursor: pointer;
  transition: transform 90ms, filter var(--dur);
}
#send:hover { filter: brightness(1.1); }
#send:active { transform: scale(0.94); }

/* --- toast --- */
.toast {
  position: fixed;
  top: 70px;
  left: 50%;
  transform: translateX(-50%);
  max-width: 340px;
  background: rgba(23, 33, 43, 0.97);
  border: 1px solid rgba(94, 181, 247, 0.3);
  color: var(--text-main);
  font-size: 13.5px;
  padding: 10px 16px;
  border-radius: 10px;
  z-index: 10;
  animation: msg-in var(--dur) ease-out;
  text-align: center;
}
.toast.alert { border-color: rgba(232, 84, 63, 0.6); }

.hidden { display: none !important; }

@media (max-width: 480px) {
  .phone { max-width: none; box-shadow: none; }
  .msg { max-width: 92%; }
}