:root {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft Yahei", sans-serif;
  color: #e5ecff;
  background: #050714;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 1.5rem;
  min-height: 100vh;
  background: radial-gradient(circle at top, rgba(94, 110, 255, 0.2), transparent 45%), #050714;
}

.app {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.app__header {
  background: rgba(7, 13, 40, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  padding: 1.5rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.45);
}

.app__header h1 {
  margin: 0;
  font-size: 1.75rem;
}

.app__header p {
  margin: 0.35rem 0 0;
  color: #98a2d7;
}

.status {
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.status--connected {
  background: rgba(17, 229, 164, 0.15);
  border-color: rgba(17, 229, 164, 0.45);
  color: #11e5a4;
}

.status--error {
  background: rgba(255, 107, 107, 0.15);
  border-color: rgba(255, 107, 107, 0.45);
  color: #ff6b6b;
}

.panel {
  background: rgba(6, 11, 34, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  padding: 1.25rem;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.02), 0 18px 45px rgba(0, 0, 0, 0.5);
}

.panel--composer {
  padding: 1rem 1.25rem;
}

.messages {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-height: min(60vh, 520px);
  overflow-y: auto;
}

.message {
  padding: 0.85rem 1rem;
  border-radius: 16px;
  background: rgba(9, 16, 52, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.05);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.35);
}

.message__meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: #9ca9e3;
  margin-bottom: 0.35rem;
}

.message__nickname {
  font-weight: 600;
  color: #7de1ff;
}

.message--me .message__nickname {
  color: #ffa1d0;
}

.message__content {
  margin: 0;
  color: #e7ebff;
  word-break: break-word;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.message__image {
  max-width: min(360px, 100%);
  border-radius: 12px;
  display: block;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.6);
  background: rgba(255, 255, 255, 0.02);
}

#chatForm {
  display: flex;
  gap: 0.75rem;
  align-items: flex-end;
  flex-wrap: wrap;
}

.composer__actions {
  display: flex;
  gap: 0.75rem;
  width: 100%;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  color: #c5cce8;
  min-width: 160px;
}

.field span {
  font-size: 0.85rem;
  letter-spacing: 0.05em;
}

.field input {
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 14px;
  padding: 0.65rem 0.8rem;
  background: rgba(2, 4, 15, 0.7);
  color: #f6f8ff;
  font-size: 1rem;
}

.field input:focus {
  outline: none;
  border-color: rgba(124, 206, 255, 0.8);
  box-shadow: 0 0 0 2px rgba(124, 206, 255, 0.35);
}

.field--grow {
  flex: 1;
}

.send-btn {
  border: none;
  border-radius: 14px;
  padding: 0.85rem 1.2rem;
  min-width: 120px;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  background: linear-gradient(135deg, #5ee7df, #b490ca);
  color: #041327;
  box-shadow: 0 10px 24px rgba(94, 231, 223, 0.4);
}

.send-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.ghost-btn {
  border-radius: 14px;
  padding: 0.85rem 1rem;
  font-size: 0.95rem;
  border: 1px dashed rgba(255, 255, 255, 0.4);
  color: #c5cce8;
  background: rgba(4, 10, 35, 0.4);
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.ghost-btn:hover {
  border-color: rgba(125, 225, 255, 0.8);
  color: #7de1ff;
}

.ghost-btn--primary {
  border-style: solid;
  border-color: rgba(125, 225, 255, 0.9);
  background: rgba(79, 102, 255, 0.15);
  color: #9cd7ff;
}

.ghost-btn--primary:hover {
  color: #d0ecff;
  border-color: rgba(180, 236, 255, 0.95);
}

.message--pending .message__content {
  opacity: 0.75;
  font-style: italic;
}

@media (max-width: 640px) {
  body {
    padding: 1rem;
  }

  .app__header {
    flex-direction: column;
    align-items: flex-start;
  }

  #chatForm {
    flex-direction: column;
  }

  .composer__actions {
    justify-content: flex-start;
  }

  .send-btn {
    width: 100%;
  }

  .ghost-btn {
    width: 100%;
  }
}