* {
  box-sizing: border-box;
}

:root {
  color-scheme: dark;
  --bg: #101114;
  --panel: #191b20;
  --border: #2b2e35;
  --text: #f1f1f3;
  --muted: #969ba7;
  --accent: #a78bfa;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, Arial, sans-serif;
}

button, input, textarea {
  font: inherit;
}

button {
  cursor: pointer;
  color: var(--text);
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: 10px;
  padding: 11px 15px;
}

button:hover {
  border-color: var(--accent);
}

span {
  color: var(--accent);
}

.hidden {
  display: none !important;
}

.muted, .disclaimer {
  color: var(--muted);
}

.auth-screen {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 20px;
}

.auth-card {
  width: min(100%, 390px);
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 30px;
  border-radius: 20px;
  text-align: center;
}

.auth-card h1 {
  font-size: 32px;
}

.auth-tabs {
  display: flex;
  gap: 8px;
  margin: 25px 0 18px;
}

.auth-tabs button {
  flex: 1;
}

.auth-tabs .active,
.selected {
  background: #30264c;
  border-color: var(--accent);
}

#authForm {
  display: grid;
  gap: 12px;
}

input, textarea {
  color: var(--text);
  background: #111216;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 13px;
  outline: none;
  width: 100%;
}

input:focus, textarea:focus {
  border-color: var(--accent);
}

.primary {
  background: var(--accent);
  color: #171322;
  border: none;
  font-weight: 700;
}

.error {
  color: #ff7777;
  min-height: 20px;
}

.app {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 250px;
  background: #15161a;
  border-right: 1px solid var(--border);
  padding: 22px;
  display: flex;
  flex-direction: column;
}

.sidebar h2 {
  margin-top: 5px;
}

.new-chat {
  margin-top: 25px;
  text-align: left;
}

.sidebar-bottom {
  margin-top: auto;
  display: grid;
  gap: 12px;
  overflow-wrap: anywhere;
  color: var(--muted);
}

.main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  height: 100vh;
  padding: 20px;
}

header {
  display: flex;
  align-items: center;
  gap: 15px;
}

header h2 {
  margin-right: auto;
}

.status {
  font-size: 12px;
  color: #75d99a;
}

.modes {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin: 15px 0;
  flex-wrap: wrap;
}

.messages {
  flex: 1;
  overflow-y: auto;
  padding: 25px max(5%, 10px);
}

.welcome {
  text-align: center;
  margin: 15vh auto 0;
}

.welcome h1 {
  font-size: clamp(25px, 4vw, 38px);
}

.welcome p {
  color: var(--muted);
}

.message {
  max-width: 780px;
  margin: 15px auto;
  padding: 15px 18px;
  border-radius: 14px;
  line-height: 1.65;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.message.user {
  background: #292434;
}

.message.assistant {
  background: var(--panel);
  border: 1px solid var(--border);
}

.composer {
  width: min(850px, 100%);
  margin: 0 auto;
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 13px;
  border-radius: 16px;
}

.composer textarea {
  resize: vertical;
  min-height: 50px;
  border: none;
  background: transparent;
}

.composer-bottom {
  display: flex;
  align-items: center;
  gap: 10px;
}

.attach {
  cursor: pointer;
  color: var(--muted);
  padding: 10px;
}

#limitText {
  color: var(--muted);
  margin-right: auto;
  font-size: 12px;
}

.disclaimer {
  text-align: center;
  font-size: 11px;
  margin: 10px 0 0;
}

#preview {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.preview-image {
  width: 65px;
  height: 65px;
  object-fit: cover;
  border-radius: 8px;
}

#mobileMenu {
  display: none;
}

@media (max-width: 700px) {
  .sidebar {
    display: none;
  }

  .main {
    padding: 12px;
  }

  #mobileMenu {
    display: block;
  }

  .modes {
    gap: 5px;
  }

  .modes button {
    padding: 9px;
    font-size: 12px;
  }

  .messages {
    padding: 10px 0;
  }
}