.app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
  width: 100%;
  max-width: none;
  margin: 0;
}

/* Header — pleine largeur */
.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  height: var(--header-height);
  padding: 0 var(--chat-gutter);
  border-bottom: 1px solid var(--border);
  background: var(--bg-secondary);
  flex-shrink: 0;
}

.chat-header h1 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.chat-header .logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 16px;
  min-width: 0;
  flex: 1;
}

@media (min-width: 768px) {
  .header-left {
    gap: 24px;
  }
}

.logo-icon {
  width: var(--avatar-size);
  height: var(--avatar-size);
  background: var(--accent);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: calc(var(--font-size-base) * 0.9);
  color: white;
  flex-shrink: 0;
}

/* Messages area */
.messages-container {
  flex: 1;
  overflow-y: auto;
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--chat-gutter);
  scroll-behavior: smooth;
}

.messages-container::-webkit-scrollbar {
  width: 8px;
}

.messages-container::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}

.messages-inner {
  width: 100%;
  max-width: 100%;
  margin: 0 auto;
}

.welcome-message {
  text-align: center;
  padding: clamp(40px, 10vh, 120px) var(--chat-gutter);
  color: var(--text-secondary);
}

.welcome-message h2 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.welcome-message p {
  font-size: var(--font-size-base);
  line-height: 1.6;
}

/* Message bubbles */
.message {
  display: flex;
  gap: 14px;
  margin-bottom: 24px;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.message.user {
  flex-direction: row-reverse;
}

.message-avatar {
  width: var(--avatar-size);
  height: var(--avatar-size);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: 600;
  flex-shrink: 0;
}

.message.admin .message-avatar {
  background: var(--accent);
  color: white;
}

.message.user .message-avatar {
  background: #5436da;
  color: white;
}

.message-body {
  max-width: min(85%, 720px);
  min-width: 0;
}

.message-content {
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: var(--font-size-base);
  line-height: 1.6;
  word-wrap: break-word;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
  min-width: 0;
}

@media (min-width: 768px) {
  .message-content {
    padding: 14px 18px;
  }
}

.message.admin .message-content {
  background: var(--admin-bubble);
  border: 1px solid var(--border);
}

.message.user .message-content {
  background: var(--user-bubble);
}

.message-content img {
  max-width: 100%;
  width: auto;
  height: auto;
  max-height: 400px;
  object-fit: contain;
  border-radius: var(--radius-sm);
  margin-top: 4px;
  display: block;
}

@media (min-width: 768px) {
  .message-content img {
    max-height: 500px;
  }
}

.message-time {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  margin-top: 6px;
  padding: 0 4px;
}

.message.user .message-time {
  text-align: right;
}

/* Typing indicator */
.typing-indicator {
  display: flex;
  gap: 14px;
  margin-bottom: 24px;
  animation: fadeIn 0.3s ease;
}

.typing-bubble {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 14px 18px;
  background: var(--admin-bubble);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.typing-bubble span {
  width: 8px;
  height: 8px;
  background: var(--text-muted);
  border-radius: 50%;
  animation: typingBounce 1.4s infinite ease-in-out;
}

.typing-bubble span:nth-child(2) { animation-delay: 0.2s; }
.typing-bubble span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typingBounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-6px); opacity: 1; }
}

/* Input area — pleine largeur */
.input-area {
  width: 100%;
  padding: 16px var(--chat-gutter) max(16px, env(safe-area-inset-bottom));
  border-top: 1px solid var(--border);
  background: var(--bg-secondary);
  flex-shrink: 0;
}

.input-area-inner {
  width: 100%;
  margin: 0 auto;
}

.input-wrapper {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 14px;
  transition: border-color 0.2s;
  max-width: 100%;
}

@media (min-width: 768px) {
  .input-wrapper {
    padding: 12px 16px;
    gap: 12px;
  }
}

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

.input-wrapper textarea {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-family: inherit;
  font-size: var(--font-size-base);
  line-height: 1.5;
  resize: none;
  max-height: var(--input-max-height);
  min-height: 28px;
}

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

.send-btn {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.2s, opacity 0.2s;
}

@media (min-width: 768px) {
  .send-btn {
    width: 46px;
    height: 46px;
  }
}

.send-btn:hover:not(:disabled) {
  background: var(--accent-hover);
}

.send-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.send-btn svg {
  width: 20px;
  height: 20px;
}

.input-hint {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  text-align: center;
  margin-top: 8px;
}

@media (max-width: 640px) {
  .message-body {
    max-width: 90%;
  }

  .chat-header {
    padding: 0 12px;
  }

  .messages-container {
    padding: 12px;
  }

  .input-area {
    padding: 12px 12px max(12px, env(safe-area-inset-bottom));
  }
}

/* Name onboarding */
.name-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  min-height: 100dvh;
  padding: var(--chat-gutter);
  background: var(--bg-primary);
}

.name-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(32px, 5vw, 48px) clamp(24px, 4vw, 40px);
  width: 100%;
  max-width: min(480px, 100%);
  text-align: center;
  box-shadow: var(--shadow);
}

.name-logo {
  width: clamp(48px, 10vw, 64px);
  height: clamp(48px, 10vw, 64px);
  font-size: var(--font-size-xl);
  margin: 0 auto 24px;
}

.name-card h2 {
  font-size: var(--font-size-xl);
  margin-bottom: 12px;
}

.name-card p {
  color: var(--text-secondary);
  font-size: var(--font-size-base);
  margin-bottom: 28px;
  line-height: 1.5;
}

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

.name-input {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: var(--font-size-base);
  outline: none;
  text-align: center;
  transition: border-color 0.2s;
}

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

.name-submit {
  padding: 14px;
  background: var(--accent);
  color: white;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-base);
  font-weight: 500;
  transition: background 0.2s;
}

.name-submit:hover:not(:disabled) {
  background: var(--accent-hover);
}

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

.name-error {
  color: var(--error);
  font-size: var(--font-size-sm);
}