/* Chat area */
.chat-area {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-lg) var(--space-md);
  display: flex;
  flex-direction: column;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
}

.chat-messages {
  max-width: var(--chat-max-width);
  width: 100%;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  padding-bottom: var(--space-md);
  min-width: 0;
}

/* Welcome screen */
.welcome-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  text-align: center;
  padding: var(--space-2xl);
  max-width: var(--chat-max-width);
  margin: 0 auto;
  width: 100%;
}

.welcome-screen h2 {
  font-size: var(--font-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.welcome-screen p {
  color: var(--text-secondary);
  font-size: var(--font-base);
}

/* Message base */
.message {
  display: flex;
  gap: var(--space-sm);
  max-width: 100%;
  animation: messageIn 0.3s ease;
  min-width: 0;
}

/* Professor message */
.message-professor {
  flex-direction: row;
  align-items: flex-start;
}

.message-avatar {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-full);
  background: var(--accent-subtle);
  border: 1px solid var(--accent-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-xs);
  font-weight: 700;
  color: var(--accent);
  flex-shrink: 0;
  margin-top: 2px;
}

.message-content {
  flex: 1;
  min-width: 0;
}

.message-sender {
  font-size: var(--font-xs);
  color: var(--text-muted);
  margin-bottom: var(--space-xs);
  font-weight: 500;
}

.message-text {
  font-size: var(--font-base);
  line-height: 1.7;
  color: var(--text-primary);
  word-wrap: break-word;
  overflow-wrap: anywhere;
}

.message-text strong {
  font-weight: 600;
}

.message-text em {
  font-style: italic;
  color: var(--text-secondary);
}

/* Student message */
.message-student {
  flex-direction: row-reverse;
  align-items: flex-start;
}

.message-student .message-content {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.message-student .message-bubble {
  background: var(--bg-tertiary);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-lg);
  border-bottom-right-radius: var(--space-xs);
  width: fit-content;
  max-width: 80%;
  word-wrap: break-word;
}

.message-student .message-text {
  font-size: var(--font-base);
}

/* Typing indicator */
.typing-indicator {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) 0;
  animation: messageIn 0.3s ease;
}

.typing-dots {
  display: flex;
  gap: 4px;
  padding: 10px 14px;
}

.typing-dots span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--text-muted);
  animation: typingBounce 1.4s infinite ease-in-out;
}

.typing-dots span:nth-child(1) {
  animation-delay: 0s;
}

.typing-dots span:nth-child(2) {
  animation-delay: 0.2s;
}

.typing-dots span:nth-child(3) {
  animation-delay: 0.4s;
}

/* Input area */
.input-area {
  border-top: 1px solid var(--border-subtle);
  padding:
    var(--space-md)
    calc(var(--space-md) + var(--safe-right))
    calc(var(--space-md) + var(--safe-bottom))
    calc(var(--space-md) + var(--safe-left));
  background: var(--bg-primary);
  flex-shrink: 0;
}

.input-container {
  max-width: var(--chat-max-width);
  margin: 0 auto;
  display: flex;
  align-items: flex-end;
  gap: var(--space-sm);
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-sm) var(--space-sm) var(--space-sm) var(--space-md);
  transition: border-color var(--transition-fast);
  min-width: 0;
}

.input-container:focus-within {
  border-color: var(--accent-border);
}

.input-container textarea {
  flex: 1;
  resize: none;
  min-height: 24px;
  max-height: 120px;
  line-height: 24px;
  padding: 0;
  background: transparent;
  color: var(--text-primary);
  font-size: max(16px, var(--font-base));
}

.input-container textarea::placeholder {
  color: var(--text-muted);
}

.btn-send {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  background: var(--accent);
  color: var(--text-inverse);
  transition: background var(--transition-fast), opacity var(--transition-fast);
  flex-shrink: 0;
  opacity: 0.3;
  pointer-events: none;
}

.btn-send.active {
  opacity: 1;
  pointer-events: auto;
}

.btn-send:hover {
  background: var(--accent-hover);
}

.btn-send svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
  stroke: none;
}

/* Error retry */
.message-error {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: rgba(248, 113, 113, 0.1);
  border: 1px solid rgba(248, 113, 113, 0.3);
  border-radius: var(--radius-md);
  color: var(--error);
  font-size: var(--font-sm);
  animation: messageIn 0.3s ease;
  width: 100%;
  max-width: var(--chat-max-width);
  margin: 0 auto;
}

.btn-retry {
  padding: 4px 12px;
  background: rgba(248, 113, 113, 0.2);
  border-radius: var(--radius-sm);
  font-size: var(--font-sm);
  color: var(--error);
  transition: background var(--transition-fast);
  white-space: nowrap;
}

.btn-retry:hover {
  background: rgba(248, 113, 113, 0.3);
}

/* ─── Inline Debug Mode ─── */

.msg-debug {
  display: none;
  width: 100%;
  margin-top: var(--space-xs);
  padding: var(--space-sm);
  background: rgba(30, 30, 50, 0.95);
  border: 1px solid rgba(120, 120, 200, 0.3);
  border-radius: var(--radius-sm);
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  font-size: 11px;
  line-height: 1.5;
  color: #c4c4e0;
  overflow-x: auto;
}

body.debug-mode .msg-debug {
  display: block;
}

.msg-debug-header {
  font-weight: 700;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: #aeaeea;
  margin-bottom: var(--space-xs);
  padding-bottom: 4px;
  border-bottom: 1px solid rgba(120, 120, 200, 0.2);
}

.msg-debug-tag {
  display: inline-block;
  padding: 2px 8px;
  margin-bottom: 4px;
  border-radius: 3px;
  font-size: 10px;
  background: rgba(120, 120, 200, 0.15);
  color: #b0b0d8;
}

.msg-debug-section {
  margin: 4px 0;
}

.msg-debug-section summary {
  cursor: pointer;
  font-weight: 600;
  color: #9d9de0;
  font-size: 11px;
  padding: 2px 0;
  user-select: none;
}

.msg-debug-section summary:hover {
  color: #c0c0ff;
}

.msg-debug-section pre {
  margin: 4px 0;
  padding: 6px 8px;
  background: rgba(0, 0, 0, 0.3);
  border-radius: 3px;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 10px;
  color: #a8a8c8;
  max-height: 300px;
  overflow-y: auto;
}

.msg-debug-kv {
  padding: 1px 0;
  font-size: 11px;
  color: #b8b8d8;
}

.msg-debug-kv span:first-child {
  font-weight: 600;
  color: #9898d0;
}

.msg-debug-info {
  font-size: 10px;
  color: #8888b0;
  margin-top: 4px;
  padding-top: 4px;
  border-top: 1px solid rgba(120, 120, 200, 0.15);
}

/* Debug toggle active state */
.btn-debug-toggle.active {
  color: var(--accent);
  background: rgba(74, 222, 128, 0.1);
}

.btn-debug-toggle.active svg {
  stroke: var(--accent);
}

/* Hidden message debug entry */
.message-debug-hidden {
  max-width: var(--chat-max-width);
  margin: 4px auto;
  padding: var(--space-xs) var(--space-sm);
  background: rgba(30, 30, 50, 0.7);
  border: 1px dashed rgba(120, 120, 200, 0.25);
  border-radius: var(--radius-sm);
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  font-size: 10px;
  color: #8888b0;
  display: none;
}

body.debug-mode .message-debug-hidden {
  display: block;
}

.msg-debug-hidden-text {
  margin: 4px 0 0;
  padding: 4px 6px;
  background: rgba(0, 0, 0, 0.3);
  border-radius: 3px;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 10px;
  color: #9898b8;
  max-height: 150px;
  overflow-y: auto;
}

/* Make messages use column layout when debug is visible */
body.debug-mode .message {
  flex-wrap: wrap;
}

body.debug-mode .message .msg-debug {
  flex-basis: 100%;
  margin-left: 48px;
}

/* ── Entendido button ── */
.btn-entendido-row {
  display: flex;
  justify-content: center;
  margin-top: 8px;
}

.btn-entendido {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 8px 28px;
  border-radius: 20px;
  font-size: .9rem;
  cursor: pointer;
  transition: background .2s, opacity .2s;
}

.btn-entendido:hover {
  background: var(--accent-hover, #3a7bd5);
}

.btn-entendido.clicked {
  opacity: .45;
  pointer-events: none;
}

/* ── Token counter (above input) ── */
.token-counter {
  text-align: center;
  font-size: .75rem;
  color: var(--text-secondary, #888);
  padding: 2px 0 4px;
  letter-spacing: .3px;
}

/* ── Per-message token badge ── */
.msg-token-badge {
  display: inline-block;
  font-size: .7rem;
  color: var(--text-secondary, #888);
  margin-left: 8px;
  vertical-align: middle;
}

/* ── Audio Player ── */
.audio-player {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  margin-top: var(--space-sm);
}

.audio-player.audio-loading {
  opacity: 0.55;
}

.audio-play-btn {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--accent);
  color: var(--text-inverse);
  flex-shrink: 0;
  cursor: pointer;
  border: none;
  transition: background var(--transition-fast);
}

.audio-play-btn:hover {
  background: var(--accent-hover);
}

.audio-play-btn:disabled {
  background: var(--bg-hover);
  color: var(--text-muted);
  cursor: default;
}

.audio-play-btn svg {
  width: 14px;
  height: 14px;
}

.audio-progress-wrapper {
  flex: 1;
  min-width: 0;
}

.audio-stream-player .audio-progress-wrapper {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.audio-progress-bar {
  height: 4px;
  background: var(--border-medium);
  border-radius: 2px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.audio-progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  width: 0%;
  transition: width 0.1s linear;
}

.audio-time {
  font-size: var(--font-xs);
  color: var(--text-muted);
  font-family: var(--font-mono);
  min-width: 36px;
  text-align: right;
}

.audio-stream-status {
  font-size: var(--font-xs);
  color: var(--text-secondary);
  line-height: 1.2;
}

.audio-stream-player.audio-streaming-live .audio-progress-fill {
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.04) inset;
}

.audio-player.audio-browser-player .audio-progress-bar {
  cursor: default;
}

.audio-player.audio-browser-player .audio-time {
  min-width: 56px;
}

@media (max-width: 768px) {
  .chat-area {
    padding: var(--space-md) var(--space-sm);
  }

  .chat-messages {
    gap: var(--space-md);
    padding-bottom: var(--space-sm);
  }

  .welcome-screen {
    padding: var(--space-xl) var(--space-sm);
  }

  .message {
    gap: 6px;
  }

  .message-avatar {
    width: 24px;
    height: 24px;
  }

  .message-student .message-content {
    width: 100%;
  }

  .message-student .message-bubble {
    max-width: 92%;
  }

  .message-error {
    flex-direction: column;
    align-items: stretch;
  }

  .btn-retry {
    width: 100%;
    text-align: center;
  }

  .input-area {
    padding:
      var(--space-sm)
      calc(var(--space-sm) + var(--safe-right))
      calc(var(--space-sm) + var(--safe-bottom))
      calc(var(--space-sm) + var(--safe-left));
  }

  .input-container {
    gap: var(--space-xs);
    padding: 10px;
  }

  .input-container textarea {
    max-height: 144px;
  }

  .btn-send {
    width: 40px;
    height: 40px;
  }

  body.debug-mode .message .msg-debug {
    margin-left: 0;
  }

  .audio-player {
    flex-wrap: wrap;
    align-items: flex-start;
  }

  .audio-progress-wrapper {
    width: 100%;
  }
}