/* ===================================
   AI Voice Agent - Premium Design
   =================================== */

:root {
  /* Color Palette - Professional & Modern */
  --primary: hsl(250, 70%, 60%);
  --primary-dark: hsl(250, 70%, 50%);
  --primary-light: hsl(250, 70%, 70%);
  --accent: hsl(320, 70%, 60%);
  --success: hsl(140, 60%, 50%);
  --warning: hsl(40, 90%, 60%);
  --danger: hsl(0, 70%, 60%);

  /* Neutral colors */
  --bg-dark: hsl(240, 20%, 8%);
  --bg-card: hsl(240, 15%, 12%);
  --bg-elevated: hsl(240, 15%, 15%);
  --border: hsl(240, 10%, 20%);
  --text-primary: hsl(0, 0%, 95%);
  --text-secondary: hsl(0, 0%, 70%);
  --text-muted: hsl(0, 0%, 50%);

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--primary), var(--accent));
  --gradient-bg: radial-gradient(ellipse at top, hsl(250, 50%, 15%), var(--bg-dark));

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(139, 92, 246, 0.3);

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

  /* Border radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}

/* ===================================
   Base Styles
   =================================== */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

.bg-gradient {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-bg);
  z-index: -1;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-md);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===================================
   Header
   =================================== */

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.logo-icon {
  font-size: 2rem;
  filter: drop-shadow(0 2px 8px rgba(139, 92, 246, 0.5));
}

.logo h1 {
  font-size: 1.75rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.status-badge {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  font-size: 0.875rem;
  font-weight: 500;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 8px var(--success);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* ===================================
   Main Content
   =================================== */

.main-content {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.welcome-section, .call-section {
  width: 100%;
  max-width: 700px;
}

.welcome-content {
  text-align: center;
}

.title {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
}

/* ===================================
   Form Styles
   =================================== */

.context-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  text-align: left;
}

.context-form h3 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.form-group.full-width {
  grid-column: 1 / -1;
}

label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

input, textarea {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 1rem;
  transition: all var(--transition-base);
}

input:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
}

textarea {
  resize: vertical;
  min-height: 80px;
}

/* ===================================
   Buttons
   =================================== */

.btn-primary {
  width: 100%;
  background: var(--gradient-primary);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  padding: 1rem 2rem;
  font-size: 1.125rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-md);
  margin-top: var(--spacing-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-icon {
  font-size: 1.5rem;
}

/* ===================================
   Call Interface
   =================================== */

.call-interface {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-lg);
}

.call-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.call-status {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
}

.pulse-ring {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--gradient-primary);
  animation: pulse-ring 2s ease-out infinite;
  box-shadow: var(--shadow-glow);
}

@keyframes pulse-ring {
  0% {
    transform: scale(0.9);
    opacity: 1;
  }
  100% {
    transform: scale(1.1);
    opacity: 0.3;
  }
}

.call-status-text h3 {
  font-size: 1.5rem;
  margin-bottom: 0.25rem;
}

.call-status-text p {
  color: var(--text-secondary);
  font-size: 1.125rem;
  font-variant-numeric: tabular-nums;
}

/* ===================================
   Audio Visualizer
   =================================== */

.visualizer {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  height: 100px;
  margin-bottom: var(--spacing-xl);
}

.wave-bar {
  width: 6px;
  height: 20px;
  background: var(--gradient-primary);
  border-radius: 3px;
  animation: wave 1.2s ease-in-out infinite;
}

.wave-bar:nth-child(1) { animation-delay: 0s; }
.wave-bar:nth-child(2) { animation-delay: 0.1s; }
.wave-bar:nth-child(3) { animation-delay: 0.2s; }
.wave-bar:nth-child(4) { animation-delay: 0.3s; }
.wave-bar:nth-child(5) { animation-delay: 0.4s; }

@keyframes wave {
  0%, 100% { height: 20px; }
  50% { height: 60px; }
}

/* ===================================
   Transcript
   =================================== */

.transcript-container {
  margin-bottom: var(--spacing-xl);
}

.transcript-container h4 {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

.transcript {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  max-height: 300px;
  overflow-y: auto;
  font-size: 0.9375rem;
  line-height: 1.8;
}

.transcript-empty {
  color: var(--text-muted);
  font-style: italic;
}

.transcript-message {
  margin-bottom: var(--spacing-sm);
  padding: var(--spacing-xs) 0;
}

.transcript-message.agent {
  color: var(--primary-light);
}

.transcript-message.user {
  color: var(--text-primary);
}

/* ===================================
   Call Controls
   =================================== */

.call-controls {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.control-btn {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  border: none;
  background: var(--bg-elevated);
  border: 2px solid var(--border);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
  font-size: 1.5rem;
}

.control-btn:hover {
  transform: scale(1.1);
  border-color: var(--primary);
}

.control-btn.end-call {
  background: var(--danger);
  border-color: var(--danger);
  color: white;
}

.control-btn.end-call:hover {
  background: hsl(0, 70%, 50%);
  border-color: hsl(0, 70%, 50%);
}

.control-btn.muted {
  background: var(--warning);
  border-color: var(--warning);
}

/* ===================================
   Call Info
   =================================== */

.call-info {
  display: flex;
  justify-content: space-around;
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border);
}

.info-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
}

.info-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.info-value {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--success);
  font-variant-numeric: tabular-nums;
}

/* ===================================
   Utility Classes
   =================================== */

.hidden {
  display: none !important;
}

/* ===================================
   Footer
   =================================== */

.footer {
  text-align: center;
  padding: var(--spacing-lg);
  color: var(--text-muted);
  font-size: 0.875rem;
}

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

@media (max-width: 768px) {
  .form-grid {
    grid-template-columns: 1fr;
  }

  .title {
    font-size: 2rem;
  }

  .subtitle {
    font-size: 1rem;
  }

  .call-interface {
    padding: var(--spacing-md);
  }
}

/* ===================================
   Scrollbar
   =================================== */

::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-elevated);
}

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

::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}

/* ===================================
   Language Selector
   =================================== */

.language-selector {
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border);
}

.language-selector label {
  display: block;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
  text-align: center;
}

.language-options {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
}

.lang-btn {
  flex: 1;
  max-width: 160px;
  padding: var(--spacing-md);
  background: var(--bg-elevated);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
  transition: all var(--transition-base);
  color: var(--text-secondary);
}

.lang-btn:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
}

.lang-btn.active {
  border-color: var(--primary);
  background: rgba(139, 92, 246, 0.1);
  color: var(--text-primary);
  box-shadow: 0 0 15px rgba(139, 92, 246, 0.2);
}

.lang-icon {
  font-size: 1.75rem;
}

.lang-name {
  font-size: 0.875rem;
  font-weight: 600;
}