/* ===== Tema morado pastel pixelart ===== */
:root {
  --bg: #f5e6ff;
  --bg-alt: #ede0fa;
  --user: #c8a8e9;
  --assistant: #e9d5ff;
  --accent: #9d7cd8;
  --accent-dark: #7a5cb0;
  --border: #4a3a5c;
  --text: #2d1f3d;
  --danger: #c33b5e;
}

* {
  box-sizing: border-box;
}

.sprite, .sprite-mini, img {
  image-rendering: pixelated;
}

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: 'VT323', monospace;
  font-size: 22px;
  line-height: 1.3;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
}

body {
  overscroll-behavior-y: contain;
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

button {
  font-family: 'Press Start 2P', monospace;
  font-size: 11px;
  background: var(--accent);
  color: white;
  border: 3px solid var(--border);
  padding: 10px 14px;
  cursor: pointer;
  box-shadow: 4px 4px 0 var(--border);
  letter-spacing: 1px;
  transition: none;
}

button:hover {
  background: var(--accent-dark);
}

button:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--border);
}

button:disabled {
  background: #b8b0c8;
  cursor: not-allowed;
  box-shadow: 2px 2px 0 var(--border);
  transform: translate(2px, 2px);
}

input, textarea {
  font-family: 'VT323', monospace;
  font-size: 22px;
  background: white;
  color: var(--text);
  border: 3px solid var(--border);
  padding: 8px 12px;
  outline: none;
  border-radius: 0;
}

input:focus, textarea:focus {
  background: #fffaff;
  box-shadow: 4px 4px 0 var(--accent);
}

/* ===== Login ===== */
.login-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 16px;
}

.login-card {
  background: white;
  padding: 32px 28px 28px;
  border: 3px solid var(--border);
  box-shadow: 6px 6px 0 var(--border);
  text-align: center;
  max-width: 360px;
  width: 100%;
}

.login-card h1 {
  font-family: 'Press Start 2P', monospace;
  font-size: 16px;
  color: var(--accent-dark);
  margin: 0 0 24px;
  line-height: 1.6;
}

.login-card form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.error {
  color: var(--danger);
  font-size: 18px;
  min-height: 22px;
  margin: 4px 0 0;
}

.btn-secondary {
  background: white;
  color: var(--accent-dark);
  border: 3px solid var(--accent-dark);
  box-shadow: 4px 4px 0 var(--accent-dark);
}

.btn-secondary:hover {
  background: var(--bg-alt);
}

.reset-link {
  font-size: 14px;
  margin: 4px 0 0;
}

.reset-link a {
  color: var(--accent-dark);
  text-decoration: underline;
  cursor: pointer;
}

/* ===== Sprite secretaria (CSS pixelart, 16x16 escalado) ===== */
.sprite {
  width: 80px;
  height: 80px;
  margin: 0 auto 16px;
  background:
    /* orejas / pelo */
    linear-gradient(#7a5cb0,#7a5cb0) 20px 0/40px 12px no-repeat,
    /* cara */
    linear-gradient(#ffd6e8,#ffd6e8) 16px 12px/48px 36px no-repeat,
    /* ojos */
    linear-gradient(var(--border),var(--border)) 24px 24px/8px 8px no-repeat,
    linear-gradient(var(--border),var(--border)) 48px 24px/8px 8px no-repeat,
    /* boquita */
    linear-gradient(#c33b5e,#c33b5e) 32px 38px/16px 4px no-repeat,
    /* cuerpo / vestido */
    linear-gradient(var(--accent),var(--accent)) 12px 48px/56px 24px no-repeat,
    /* lazo */
    linear-gradient(#fff,#fff) 36px 8px/8px 8px no-repeat,
    var(--bg);
  border: 3px solid var(--border);
  box-shadow: 4px 4px 0 var(--border);
}

.sprite-mini {
  display: inline-block;
  width: 24px;
  height: 24px;
  vertical-align: middle;
  margin-right: 8px;
  background:
    linear-gradient(#7a5cb0,#7a5cb0) 6px 0/12px 4px no-repeat,
    linear-gradient(#ffd6e8,#ffd6e8) 4px 4px/16px 12px no-repeat,
    linear-gradient(var(--border),var(--border)) 7px 8px/2px 2px no-repeat,
    linear-gradient(var(--border),var(--border)) 15px 8px/2px 2px no-repeat,
    linear-gradient(var(--accent),var(--accent)) 2px 16px/20px 8px no-repeat,
    var(--bg);
  border: 2px solid var(--border);
}

/* ===== App layout ===== */
.app {
  display: grid;
  grid-template-columns: 280px 1fr;
  height: 100vh;
  height: 100dvh;
  position: relative;
}

.backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(45, 31, 61, 0.5);
  z-index: 50;
}

.backdrop.open {
  display: block;
}

.sidebar {
  background: var(--bg-alt);
  border-right: 3px solid var(--border);
  padding: 16px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.sidebar h2 {
  font-family: 'Press Start 2P', monospace;
  font-size: 11px;
  color: var(--accent-dark);
  margin: 0 0 12px;
  letter-spacing: 1px;
}

.new-btn {
  width: 100%;
  margin-bottom: 16px;
}

.conv-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.conv-item {
  padding: 8px 10px;
  border: 2px solid var(--border);
  background: white;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  font-size: 18px;
  box-shadow: 3px 3px 0 var(--border);
}

.conv-item:hover {
  background: #fffaff;
}

.conv-item.active {
  background: var(--user);
  color: var(--text);
}

.conv-item .conv-title {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.conv-item .del {
  background: transparent;
  border: none;
  box-shadow: none;
  padding: 2px 6px;
  color: var(--border);
  font-size: 10px;
}

.conv-item .del:hover {
  background: var(--danger);
  color: white;
}

.conv-item .del:active {
  transform: none;
}

/* ===== Main / chat ===== */
.main {
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
  min-width: 0;
}

.topbar {
  background: var(--accent);
  color: white;
  padding: 14px 16px;
  padding-top: max(14px, env(safe-area-inset-top));
  padding-left: max(16px, env(safe-area-inset-left));
  padding-right: max(16px, env(safe-area-inset-right));
  border-bottom: 3px solid var(--border);
  font-family: 'Press Start 2P', monospace;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  flex-wrap: nowrap;
  min-width: 0;
}

.topbar .title {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  letter-spacing: 1px;
  overflow: hidden;
}

.topbar .title > span:not(.sprite-mini) {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.model-badge {
  font-family: 'VT323', monospace;
  font-size: 14px;
  background: rgba(255,255,255,0.15);
  color: white;
  padding: 2px 8px;
  border: 1px solid rgba(255,255,255,0.3);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 120px;
}

.clear-btn {
  font-family: 'Press Start 2P', monospace;
  font-size: 12px;
  padding: 6px 10px;
  background: var(--accent-dark);
  flex-shrink: 0;
}

.topbar .logout {
  font-size: 10px;
  padding: 8px 10px;
  background: var(--accent-dark);
}

.hamburger {
  display: none;
  font-family: 'Press Start 2P', monospace;
  font-size: 16px;
  padding: 6px 10px;
  background: var(--accent-dark);
}

.messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  background:
    repeating-linear-gradient(
      45deg,
      transparent 0,
      transparent 20px,
      rgba(157, 124, 216, 0.05) 20px,
      rgba(157, 124, 216, 0.05) 22px
    ),
    var(--bg);
}

.welcome {
  text-align: center;
  color: var(--accent-dark);
  font-size: 22px;
  padding: 40px 20px;
  font-style: italic;
}

.msg {
  max-width: 78%;
  padding: 10px 14px;
  border: 2px solid var(--border);
  word-wrap: break-word;
  overflow-wrap: anywhere;
  box-shadow: 3px 3px 0 var(--border);
  font-size: 22px;
  line-height: 1.35;
}

/* Markdown dentro de mensajes del asistente */
.msg.assistant p { margin: 0 0 0.4em; }
.msg.assistant p:last-child { margin-bottom: 0; }
.msg.assistant ul, .msg.assistant ol { margin: 0.3em 0 0.3em 1.2em; padding: 0; }
.msg.assistant li { margin: 0.1em 0; }
.msg.assistant code {
  font-family: monospace;
  font-size: 0.85em;
  background: rgba(0,0,0,0.08);
  padding: 1px 4px;
  border-radius: 2px;
}
.msg.assistant pre {
  background: rgba(0,0,0,0.08);
  padding: 8px;
  overflow-x: auto;
  margin: 0.4em 0;
}
.msg.assistant pre code { background: none; padding: 0; }
.msg.assistant strong { font-weight: bold; }
.msg.assistant em { font-style: italic; }
.msg.assistant h1, .msg.assistant h2, .msg.assistant h3 {
  font-family: 'Press Start 2P', monospace;
  font-size: 0.7em;
  margin: 0.5em 0 0.3em;
  line-height: 1.5;
}
.msg.user { white-space: pre-wrap; }

.msg.user {
  background: var(--user);
  align-self: flex-end;
}

.msg.assistant {
  background: var(--assistant);
  align-self: flex-start;
}

.msg.error {
  background: #ffd6dd;
  align-self: flex-start;
  color: var(--danger);
}

.typing {
  align-self: flex-start;
  font-family: 'Press Start 2P', monospace;
  font-size: 11px;
  color: var(--accent-dark);
  padding: 8px 14px;
}

.typing .dots::after {
  content: ' .';
  animation: dots 1s steps(4, end) infinite;
}

@keyframes dots {
  0%   { content: ''; }
  25%  { content: ' .'; }
  50%  { content: ' . .'; }
  75%  { content: ' . . .'; }
  100% { content: ''; }
}

.composer {
  display: flex;
  gap: 10px;
  padding: 14px;
  padding-bottom: max(14px, env(safe-area-inset-bottom));
  padding-left: max(14px, env(safe-area-inset-left));
  padding-right: max(14px, env(safe-area-inset-right));
  border-top: 3px solid var(--border);
  background: white;
}

.composer textarea {
  flex: 1;
  resize: none;
  min-height: 56px;
  max-height: 160px;
  font-size: 16px; /* >=16px evita el zoom automático de iOS Safari al hacer focus */
  line-height: 1.4;
}

.composer button {
  align-self: stretch;
  white-space: nowrap;
}

.messages {
  -webkit-overflow-scrolling: touch;
}

/* ===== Mobile ===== */
@media (max-width: 760px) {
  .app {
    grid-template-columns: 1fr;
  }
  .sidebar {
    display: none;
    position: fixed;
    top: 0; left: 0; bottom: 0;
    width: 80vw;
    max-width: 300px;
    z-index: 100;
    box-shadow: 6px 0 0 var(--border);
    padding-top: max(16px, env(safe-area-inset-top));
    padding-bottom: max(16px, env(safe-area-inset-bottom));
    padding-left: max(16px, env(safe-area-inset-left));
    overflow-y: auto;
  }
  .sidebar.open {
    display: flex;
  }
  .hamburger {
    display: inline-block;
    flex-shrink: 0;
  }
  .topbar {
    font-size: 11px;
    padding: 12px 14px;
    padding-top: max(12px, env(safe-area-inset-top));
  }
  .topbar .title > span:not(.sprite-mini) {
    font-size: 10px;
  }
  .topbar .logout {
    flex-shrink: 0;
    font-size: 9px;
    padding: 8px;
  }
  .model-badge {
    display: none;
  }
  .clear-btn {
    font-size: 11px;
    padding: 6px 8px;
  }
  .msg {
    max-width: 88%;
    font-size: 18px;
  }
  .composer {
    padding: 10px;
    padding-bottom: max(10px, env(safe-area-inset-bottom));
    gap: 8px;
  }
  .composer textarea {
    min-height: 50px;
  }
  .composer button {
    font-size: 10px;
    padding: 8px 10px;
  }
  .conv-item {
    font-size: 16px;
    padding: 10px 12px;
    min-height: 44px;
  }
  .welcome {
    font-size: 18px;
    padding: 24px 16px;
  }
}

@media (max-width: 380px) {
  .topbar .title > span:not(.sprite-mini) {
    display: none;
  }
}