frontend/src/styles.css

:root {
  --bg: #1a0b2e;
  --bg-soft: #261245;
  --bg-card: #2d1654;
  --accent: #ff5b8a;
  --accent-soft: #ff8fb1;
  --text: #f4ecff;
  --text-dim: #b8a9d9;
  --border: #3d1f6b;
  --error: #ff7676;

  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html,
body,
#root {
  height: 100%;
  margin: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, sans-serif;
  background: radial-gradient(circle at 20% 0%, #3a1668 0%, var(--bg) 55%);
  color: var(--text);
  line-height: 1.45;
}

.screen {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  padding: 24px;
  gap: 16px;
}

.screen--center {
  align-items: center;
  justify-content: center;
}

.card {
  width: min(420px, 100%);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}

.title {
  font-size: 32px;
  margin: 0 0 8px;
  letter-spacing: -0.02em;
}

.title--small {
  font-size: 20px;
  margin: 0;
}

.subtitle {
  margin: 0 0 20px;
  color: var(--text-dim);
}

.subtitle--small {
  font-size: 13px;
  margin: 4px 0 0;
}

.label {
  display: block;
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 6px;
}

.input {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-soft);
  color: var(--text);
  font-size: 15px;
  outline: none;
  transition: border-color 120ms ease, box-shadow 120ms ease;
}

.input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(255, 91, 138, 0.2);
}

.input:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px 18px;
  border-radius: 10px;
  border: none;
  background: var(--accent);
  color: #1a0b2e;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: transform 80ms ease, background 120ms ease;
}

.button:hover:not(:disabled) {
  background: var(--accent-soft);
}

.button:active:not(:disabled) {
  transform: translateY(1px);
}

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

.button--ghost {
  background: transparent;
  color: var(--text-dim);
  border: 1px solid var(--border);
}

.button--ghost:hover:not(:disabled) {
  background: var(--bg-soft);
  color: var(--text);
}

.join {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.error {
  color: var(--error);
  font-size: 13px;
  margin: 0;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 20px;
  border-radius: 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
}

.layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 16px;
  flex: 1;
  min-height: 0;
}

.roster {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 0;
}

.roster__title {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  margin: 0;
}

.roster__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
  overflow-y: auto;
}

.roster__item {
  padding: 6px 10px;
  border-radius: 8px;
  font-size: 14px;
  color: var(--text);
}

.roster__item--me {
  background: rgba(255, 91, 138, 0.18);
  color: var(--accent-soft);
  font-weight: 600;
}

.chat {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  min-height: 0;
  overflow: hidden;
}

.chat__log {
  list-style: none;
  margin: 0;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  overflow-y: auto;
  flex: 1;
}

.chat__system {
  align-self: center;
  font-size: 12px;
  color: var(--text-dim);
  font-style: italic;
}

.chat__message {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 8px 12px;
  border-radius: 10px;
  background: var(--bg-soft);
  max-width: 80%;
  word-wrap: break-word;
}

.chat__message--me {
  background: rgba(255, 91, 138, 0.15);
  align-self: flex-end;
}

.chat__author {
  font-size: 12px;
  color: var(--text-dim);
  font-weight: 600;
}

.chat__text {
  font-size: 15px;
  white-space: pre-wrap;
}

.composer {
  display: flex;
  gap: 8px;
  padding: 12px;
  border-top: 1px solid var(--border);
  background: var(--bg-soft);
}

.composer .input {
  flex: 1;
}

@media (max-width: 720px) {
  .layout {
    grid-template-columns: 1fr;
  }
  .roster {
    order: 2;
  }
}