/* ==========================================================================
   Voice Assistant - Style
   Interface utilisateur élégante, dark theme, mobile-first
   ========================================================================== */

/* Reset & Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Colors - Dark theme élégant */
  --bg-primary: #0a0a0f;
  --bg-secondary: #141420;
  --bg-tertiary: #1c1c2e;
  --bg-elevated: #252538;

  --text-primary: #e8e8f2;
  --text-secondary: #a8a8c0;
  --text-tertiary: #707088;

  --accent: #6366f1;
  --accent-hover: #7c7ff5;
  --accent-active: #4f52d9;

  --success: #10b981;
  --error: #ef4444;
  --warning: #f59e0b;

  --border: rgba(255, 255, 255, 0.1);
  --shadow: rgba(0, 0, 0, 0.3);

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;

  /* Typography */
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-size-base: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 24px;
  --font-size-2xl: 32px;

  --line-height: 1.6;

  /* Border radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: var(--line-height);
  color: var(--text-primary);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Écrans */
.screen {
  width: 100%;
  height: 100%;
  position: relative;
}

.screen.hidden,
#login-screen.hidden,
#chat-screen.hidden {
  display: none !important;
}

/* ==========================================================================
   Écran de connexion
   ========================================================================== */

#login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.login-container {
  width: 100%;
  max-width: 400px;
  padding: var(--spacing-xl);
  text-align: center;
}

.logo {
  margin-bottom: var(--spacing-lg);
  color: var(--accent);
  animation: fadeIn 0.6s ease-out;
}

.logo svg {
  filter: drop-shadow(0 0 20px rgba(99, 102, 241, 0.4));
}

#login-screen h1 {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  animation: fadeIn 0.6s ease-out 0.1s backwards;
}

.subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  animation: fadeIn 0.6s ease-out 0.2s backwards;
}

.login-form {
  animation: fadeIn 0.6s ease-out 0.3s backwards;
}

.input-group {
  margin-bottom: var(--spacing-md);
}

.input-group input {
  width: 100%;
  padding: var(--spacing-md);
  font-size: var(--font-size-lg);
  color: var(--text-primary);
  background: var(--bg-elevated);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  outline: none;
  transition: all 0.2s;
}

.input-group input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.input-group input::placeholder {
  color: var(--text-tertiary);
}

.btn-primary {
  width: 100%;
  padding: var(--spacing-md);
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: white;
  background: var(--accent);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s;
}

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

.btn-primary:active {
  background: var(--accent-active);
  transform: scale(0.98);
}

.error-message {
  margin-top: var(--spacing-md);
  padding: var(--spacing-sm);
  font-size: 14px;
  color: var(--error);
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--error);
  border-radius: var(--radius-sm);
}

.error-message.hidden {
  display: none;
}

/* ==========================================================================
   Écran de chat
   ========================================================================== */

#chat-screen {
  display: flex;
  flex-direction: column;
}

/* Header */
.chat-header {
  flex-shrink: 0;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  padding: var(--spacing-sm) var(--spacing-md);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.chat-header h2 {
  font-size: var(--font-size-xl);
  font-weight: 600;
}

.header-actions {
  display: flex;
  gap: var(--spacing-xs);
}

.btn-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
}

.btn-icon:hover {
  background: var(--bg-elevated);
  color: var(--text-primary);
}

.btn-icon:active {
  transform: scale(0.95);
}

/* Conversation */
.conversation {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  background: var(--bg-primary);
}

.conversation-inner {
  padding: var(--spacing-md);
  min-height: 100%;
  display: flex;
  flex-direction: column;
}

/* Empty state */
.empty-state {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-tertiary);
  gap: var(--spacing-md);
}

.empty-state.hidden {
  display: none;
}

/* Messages */
.message {
  margin-bottom: var(--spacing-md);
  animation: messageIn 0.3s ease-out;
}

.message-content {
  max-width: 85%;
  padding: var(--spacing-md);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-lg);
  line-height: var(--line-height);
}

/* Message utilisateur (à droite) */
.message.user .message-content {
  margin-left: auto;
  background: var(--accent);
  color: white;
  border-bottom-right-radius: var(--radius-sm);
}

/* Message assistant (à gauche) */
.message.assistant .message-content {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border-bottom-left-radius: var(--radius-sm);
}

/* Bouton lecture audio (dans message assistant) */
.message.assistant .audio-controls {
  margin-top: var(--spacing-sm);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.btn-play-audio {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 14px;
  color: var(--accent);
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
}

.btn-play-audio:hover {
  background: rgba(99, 102, 241, 0.2);
}

/* Indicateur de chargement dans message */
.message.loading .message-content {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-secondary);
}

.loading-dots {
  display: flex;
  gap: 4px;
}

.loading-dots span {
  width: 6px;
  height: 6px;
  background: var(--text-tertiary);
  border-radius: 50%;
  animation: loadingDot 1.4s infinite;
}

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

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

/* Bouton micro */
.mic-container {
  flex-shrink: 0;
  padding: var(--spacing-lg) var(--spacing-md);
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
}

.mic-button {
  position: relative;
  width: 80px;
  height: 80px;
  background: var(--accent);
  border: none;
  border-radius: 50%;
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  box-shadow: 0 8px 24px var(--shadow);
}

.mic-button:hover {
  background: var(--accent-hover);
  transform: scale(1.05);
}

.mic-button:active {
  transform: scale(0.95);
}

/* État recording */
.mic-button.recording {
  background: var(--error);
  animation: pulse 2s infinite;
}

/* État processing */
.mic-button.processing {
  background: var(--bg-elevated);
  cursor: not-allowed;
}

/* Indicateurs */
.mic-pulse, .mic-spinner {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 50%;
}

.mic-pulse {
  border: 3px solid var(--error);
  animation: pulse 1.5s infinite;
}

.mic-spinner {
  border: 3px solid transparent;
  border-top-color: var(--accent);
  animation: spin 1s linear infinite;
}

.mic-pulse.hidden,
.mic-spinner.hidden {
  display: none;
}

.status-text {
  font-size: 14px;
  color: var(--text-secondary);
  text-align: center;
  min-height: 20px;
}

/* ==========================================================================
   Animations
   ========================================================================== */

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes messageIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.1);
    opacity: 0.8;
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes loadingDot {
  0%, 80%, 100% {
    opacity: 0.3;
  }
  40% {
    opacity: 1;
  }
}

/* ==========================================================================
   Modal Settings
   ========================================================================== */

.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.2s ease-out;
}

.modal.hidden {
  display: none;
}

.modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
}

.modal-content {
  position: relative;
  width: 90%;
  max-width: 400px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 50px var(--shadow);
  animation: fadeIn 0.3s ease-out;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--border);
}

.modal-header h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
}

.modal-body {
  padding: var(--spacing-lg);
}

.setting-group {
  margin-bottom: var(--spacing-md);
}

.setting-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
}

.select-input {
  width: 100%;
  padding: var(--spacing-sm);
  font-size: var(--font-size-base);
  color: var(--text-primary);
  background: var(--bg-elevated);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  outline: none;
  cursor: pointer;
  transition: all 0.2s;
}

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

.btn-secondary {
  width: 100%;
  padding: var(--spacing-sm);
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--text-primary);
  background: var(--bg-elevated);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
}

.btn-secondary:hover {
  border-color: var(--accent);
  background: var(--bg-tertiary);
}

.btn-secondary:active {
  transform: scale(0.98);
}

/* ==========================================================================
   Responsive
   ========================================================================== */

/* iPhone SE et similaires */
@media (max-height: 667px) {
  .mic-button {
    width: 70px;
    height: 70px;
  }

  .mic-icon {
    width: 36px;
    height: 36px;
  }
}

/* iPad et tablettes */
@media (min-width: 768px) {
  .conversation-inner {
    max-width: 700px;
    margin: 0 auto;
  }

  .message-content {
    max-width: 70%;
  }
}