/* ===== CSS CUSTOM PROPERTIES ===== */
:root {
  /* Color Palette */
  --primary-color: #2196F3;
  --primary-hover: #1976D2;
  --primary-active: #0D47A1;
  --secondary-color: #42A5F5;
  --success-color: #10b981;
  --success-hover: #059669;
  --danger-color: #ef4444;
  --danger-hover: #dc2626;
  --warning-color: #f59e0b;
  --warning-hover: #d97706;
  
  /* Neutral Colors */
  --background-color: #f8fafc;
  --surface-color: #ffffff;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --border-color: #e2e8f0;
  --border-hover: #cbd5e1;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  
  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  
  /* Layout */
  --border-radius: 8px;
  --border-radius-sm: 4px;
  --border-radius-lg: 12px;
  --border-radius-full: 50%;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
}

/* ===== RESET & BASE STYLES ===== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--background-color);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== LAYOUT COMPONENTS ===== */
.app-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.app-header {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  color: white;
  padding: var(--spacing-lg) var(--spacing-md);
  text-align: center;
  box-shadow: var(--shadow);
}

.app-title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
}

.app-subtitle {
  font-size: var(--font-size-lg);
  opacity: 0.9;
  font-weight: 400;
}

.main-content {
  flex: 1;
  padding: var(--spacing-xl) var(--spacing-md);
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

/* ===== BUTTON SYSTEM ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  border: none;
  border-radius: var(--border-radius);
  font-family: inherit;
  font-size: var(--font-size-base);
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  min-height: 44px; /* Touch-friendly minimum */
  user-select: none;
}

.btn:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
}

/* Button Variants */
.btn-primary {
  background-color: var(--primary-color);
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

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

.btn-success {
  background-color: var(--success-color);
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-success:hover:not(:disabled) {
  background-color: var(--success-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.btn-danger {
  background-color: var(--danger-color);
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-danger:hover:not(:disabled) {
  background-color: var(--danger-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.btn-warning {
  background-color: var(--warning-color);
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-warning:hover:not(:disabled) {
  background-color: var(--warning-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.btn-secondary {
  background-color: var(--text-secondary);
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--text-primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.btn-outline {
  background-color: transparent;
  color: var(--text-primary);
  border: 2px solid var(--border-color);
}

.btn-outline:hover:not(:disabled) {
  background-color: var(--surface-color);
  border-color: var(--border-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn-icon {
  font-size: var(--font-size-lg);
}

.btn-text {
  font-weight: 500;
}

/* ===== LOGIN SECTION ===== */
.login-section {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 60vh;
  padding: var(--spacing-lg);
}

.login-card {
  background: var(--surface-color);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-xl);
  width: 100%;
  max-width: 500px;
  text-align: center;
  border: 1px solid var(--border-color);
}

.login-header h2 {
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
  font-size: 1.8rem;
  font-weight: 600;
}

.login-header p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  font-size: 1rem;
}

.support-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
  padding: var(--spacing-lg);
  background: linear-gradient(135deg, var(--primary-color-alpha), var(--secondary-color-alpha));
  border-radius: var(--border-radius-md);
  border: 1px solid var(--border-color);
}

.support-feature {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  text-align: left;
}

.feature-icon {
  font-size: 2rem;
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-color);
  border-radius: 50%;
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}

.feature-text h3 {
  color: var(--text-primary);
  margin: 0 0 var(--spacing-xs) 0;
  font-size: 1.1rem;
  font-weight: 600;
}

.feature-text p {
  color: var(--text-secondary);
  margin: 0;
  font-size: 0.9rem;
}

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

.form-group {
  text-align: left;
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
  font-weight: 500;
  font-size: 0.9rem;
}

.form-group input {
  width: 100%;
  padding: var(--spacing-sm);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  font-size: 1rem;
  transition: var(--transition-fast);
  background: var(--background-color);
  color: var(--text-primary);
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px var(--primary-color-alpha);
}

.btn-login {
  width: 100%;
  font-size: var(--font-size-lg);
  padding: var(--spacing-lg) var(--spacing-xl);
}

/* ===== CALL CONTROLS SECTION ===== */
.call-controls-section {
  margin-bottom: var(--spacing-2xl);
}

.controls-container {
  background: var(--surface-color);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow);
  padding: var(--spacing-xl);
  border: 1px solid var(--border-color);
}

.controls-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
}

.controls-header h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary);
}

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

.status-indicator {
  width: 8px;
  height: 8px;
  border-radius: var(--border-radius-full);
  background-color: var(--success-color);
  animation: pulse 2s infinite;
}

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

.status-text {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  font-weight: 500;
}

.controls-grid {
  display: grid;
  gap: var(--spacing-lg);
}

.control-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  justify-content: center;
}

/* ===== DTMF KEYPAD ===== */
.dtmf-section {
  margin-bottom: var(--spacing-2xl);
}

.dtmf-container {
  background: var(--surface-color);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow);
  padding: var(--spacing-xl);
  border: 1px solid var(--border-color);
  max-width: 350px;
  margin: 0 auto;
}

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

.dtmf-header h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
}

.dtmf-header p {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
}

.dtmf-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
}

.dtmf-btn {
  width: 60px;
  height: 60px;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius-full);
  background: var(--surface-color);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.dtmf-btn:hover {
  border-color: var(--primary-color);
  background: var(--primary-color);
  color: white;
  transform: scale(1.05);
  box-shadow: var(--shadow);
}

.dtmf-btn:active {
  transform: scale(0.95);
  box-shadow: var(--shadow-sm);
}

.dtmf-btn:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

.dtmf-number {
  font-size: var(--font-size-lg);
  font-weight: 600;
  line-height: 1;
}

.dtmf-letters {
  font-size: var(--font-size-xs);
  font-weight: 400;
  opacity: 0.7;
  line-height: 1;
  margin-top: 2px;
}

.dtmf-special .dtmf-number {
  font-size: var(--font-size-xl);
}

/* ===== DEVICE MANAGEMENT ===== */
.device-section {
  margin-bottom: var(--spacing-2xl);
}

.device-toggle {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.device-panel {
  background: var(--surface-color);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow);
  padding: var(--spacing-xl);
  border: 1px solid var(--border-color);
}

.device-panel-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
}

.device-panel-header h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
}

.device-panel-header p {
  color: var(--text-secondary);
}

.device-groups {
  display: grid;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.device-group h4 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.device-table-container {
  background: var(--background-color);
  border-radius: var(--border-radius);
  padding: var(--spacing-md);
  border: 1px solid var(--border-color);
}

.device-table {
  width: 100%;
  border-collapse: collapse;
}

.device-table td {
  padding: var(--spacing-sm) var(--spacing-md);
  border-bottom: 1px solid var(--border-color);
}

.device-table tr:last-child td {
  border-bottom: none;
}

.device-table tr:hover {
  background-color: var(--border-color);
}

.device-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== AUDIO SECTION ===== */
.audio-section {
	margin-bottom: var(--spacing-2xl);
}

.audio-container {
	background: var(--surface-color);
	border-radius: var(--border-radius-lg);
	box-shadow: var(--shadow);
	padding: var(--spacing-xl);
	border: 1px solid var(--border-color);
	text-align: center;
}

.audio-status {
	display: flex;
	justify-content: center;
	align-items: center;
}

.audio-indicator {
	display: flex;
	align-items: center;
	gap: var(--spacing-md);
	padding: var(--spacing-lg);
	background: var(--success-color);
	color: white;
	border-radius: var(--border-radius-lg);
	box-shadow: var(--shadow-sm);
}

.audio-icon {
	font-size: var(--font-size-xl);
	animation: pulse 2s infinite;
}

.audio-label {
	font-size: var(--font-size-lg);
	font-weight: 600;
}

/* ===== STATUS SECTION ===== */
.status-section {
  margin-bottom: var(--spacing-lg);
}

.status-message {
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--border-radius);
  background: var(--danger-color);
  color: white;
  font-weight: 500;
  text-align: center;
  box-shadow: var(--shadow);
  display: none;
}

.status-message:not(:empty) {
  display: block;
  animation: slideIn var(--transition-normal) ease-out;
}

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

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
  .main-content {
    padding: var(--spacing-lg) var(--spacing-sm);
  }
  
  .app-header {
    padding: var(--spacing-md) var(--spacing-sm);
  }
  
  .app-title {
    font-size: var(--font-size-2xl);
  }
  
  .login-card {
    padding: var(--spacing-lg);
    margin: 0 var(--spacing-sm);
  }
  
  .controls-container {
    padding: var(--spacing-lg);
  }
  
  .controls-header {
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
  }
  
  .control-group {
    justify-content: center;
  }
  
  .btn {
    min-width: 120px;
    padding: var(--spacing-md);
  }
  
  .dtmf-btn {
    width: 50px;
    height: 50px;
  }
  

  
  .device-actions {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .dtmf-grid {
    gap: var(--spacing-sm);
  }
  
  .dtmf-btn {
    width: 45px;
    height: 45px;
  }
  
  .dtmf-number {
    font-size: var(--font-size-base);
  }
  
  .dtmf-letters {
    font-size: 10px;
  }
  
  /* Action buttons removed */
  
  .controls-grid {
    gap: var(--spacing-md);
  }
  
  .control-group {
    gap: var(--spacing-sm);
  }
}

@media (min-width: 1024px) {
  .main-content {
    padding: var(--spacing-2xl);
  }
  
  .controls-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  }
  
  .device-groups {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }
  

}

/* ===== ACCESSIBILITY ENHANCEMENTS ===== */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --background-color: #0f172a;
    --surface-color: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    --border-color: #334155;
    --border-hover: #475569;
  }
}

/* ===== FOCUS MANAGEMENT ===== */
.btn:focus-visible,
.dtmf-btn:focus-visible,
.video-control-btn:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* ===== IPHONE-STYLE CALL INTERFACE ===== */
.iphone-call-interface {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

.call-screen {
  width: 100%;
  max-width: 375px; /* iPhone-style width for all screens */
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: var(--spacing-2xl) var(--spacing-lg);
  text-align: center;
  margin: 0 auto; /* Center on large screens */
  box-shadow: 0 0 50px rgba(0, 0, 0, 0.3); /* Add shadow for depth on large screens */
}

/* Contact Display */
.contact-display {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin-top: 60px;
}

.contact-avatar {
  margin-bottom: var(--spacing-xl);
}

.avatar-circle {
  width: 120px;
  height: 120px;
  border-radius: var(--border-radius-full);
  background: rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
  backdrop-filter: blur(10px);
  border: 2px solid rgba(255, 255, 255, 0.3);
}

.avatar-icon {
  font-size: 3rem;
  color: white;
}

.contact-info {
  margin-bottom: var(--spacing-xl);
}

.contact-name {
  font-size: var(--font-size-3xl);
  font-weight: 300;
  margin: 0 0 var(--spacing-sm) 0;
  color: white;
}

.contact-number {
  font-size: var(--font-size-lg);
  margin: 0;
  color: rgba(255, 255, 255, 0.8);
  font-weight: 300;
}

/* Call Status and Timer */
.call-status-area {
  flex: 0;
  margin: var(--spacing-xl) 0;
}

.call-status {
  margin-bottom: var(--spacing-md);
}

.status-text {
  font-size: var(--font-size-lg);
  color: rgba(255, 255, 255, 0.9);
  font-weight: 300;
}

.call-timer {
  margin-top: var(--spacing-md);
}

#timerDisplay {
  font-size: var(--font-size-xl);
  font-weight: 300;
  color: white;
  font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
}

/* Call Actions - Simplified for end call only */
.call-actions {
  flex: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 60px;
}

/* End Call Button */
.end-call-container {
  display: flex;
  justify-content: center;
}

.end-call-btn {
  width: 80px;
  height: 80px;
  border-radius: var(--border-radius-full);
  background: #ff3b30;
  border: none;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 4px 20px rgba(255, 59, 48, 0.4);
}

.end-call-btn:hover {
  background: #d70015;
  transform: scale(1.05);
}

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

.end-call-icon {
  font-size: 2rem;
  transform: rotate(135deg);
}

/* iPhone keypad removed for cleaner interface */

/* ===== RESPONSIVE DESIGN ===== */

/* Mobile Phones (320px - 480px) */
@media screen and (max-width: 480px) {
  .call-screen {
    max-width: 100%;
    padding: 1rem 1rem;
  }
  
  .contact-display {
    margin-top: 40px;
  }
  
  .avatar-circle {
    width: 100px;
    height: 100px;
  }
  
  .avatar-icon {
    font-size: 2.5rem;
  }
  
  .contact-name {
    font-size: 1.8rem;
  }
  
  .contact-number {
    font-size: 1rem;
  }
  
  .status-text {
    font-size: 1rem;
  }
  
  #timerDisplay {
    font-size: 1.2rem;
  }
  
  /* Action buttons removed */
  
  .end-call-btn {
    width: 70px;
    height: 70px;
  }
  
  .end-call-icon {
    font-size: 1.8rem;
  }
  
  .call-actions {
    margin-bottom: 40px;
  }
}

/* Small Mobile Phones (320px - 375px) */
@media screen and (max-width: 375px) {
  .call-screen {
    padding: 0.8rem 0.8rem;
  }
  
  .avatar-circle {
    width: 90px;
    height: 90px;
  }
  
  .avatar-icon {
    font-size: 2.2rem;
  }
  
  .contact-name {
    font-size: 1.6rem;
  }
  
  /* Action buttons removed */
  
  .end-call-btn {
    width: 65px;
    height: 65px;
  }
  
  .end-call-icon {
    font-size: 1.6rem;
  }
  
  /* Keypad and action buttons removed */
}

/* Tablets (481px - 768px) */
@media screen and (min-width: 481px) and (max-width: 768px) {
  .call-screen {
    max-width: 450px;
    padding: 2rem 1.5rem;
  }
  
  .contact-display {
    margin-top: 60px;
  }
  
  .avatar-circle {
    width: 140px;
    height: 140px;
  }
  
  .avatar-icon {
    font-size: 3.5rem;
  }
  
  .contact-name {
    font-size: 2.2rem;
  }
  
  .contact-number {
    font-size: 1.2rem;
  }
  
  .status-text {
    font-size: 1.1rem;
  }
  
  #timerDisplay {
    font-size: 1.4rem;
  }
  
  /* Action buttons removed */
  
  .end-call-btn {
    width: 90px;
    height: 90px;
  }
  
  .end-call-icon {
    font-size: 2.2rem;
  }
  
  .call-actions {
    margin-bottom: 60px;
    gap: 2rem;
  }
  
  .action-buttons-row {
    gap: 2.5rem;
  }
  
  /* iPhone Keypad for Tablets */
  .iphone-keypad {
    padding: 1.5rem;
  }
  
  .iphone-keypad .dtmf-grid {
    max-width: 320px;
    gap: 1rem;
  }
  
  .iphone-keypad .dtmf-btn {
    width: 85px;
    height: 85px;
  }
  
  .iphone-keypad .dtmf-number {
    font-size: 1.8rem;
  }
}

/* Desktop/Laptop (769px+) - Mobile-style interface */
@media screen and (min-width: 769px) {
  .iphone-call-interface {
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  }
  
  .call-screen {
    max-width: 375px; /* Keep iPhone-style width */
    height: 100vh; /* Full height like mobile */
    padding: var(--spacing-2xl) var(--spacing-lg); /* Same as mobile */
    border-radius: 0; /* No border radius for full mobile experience */
    background: transparent; /* Keep original gradient background */
    backdrop-filter: none;
    border: none;
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.3); /* Subtle shadow for depth */
  }
  
  .contact-display {
    margin-top: 60px; /* Same as mobile */
  }
  
  .avatar-circle {
    width: 120px; /* Same as mobile */
    height: 120px;
  }
  
  .avatar-icon {
    font-size: 3rem; /* Same as mobile */
  }
  
  .contact-name {
    font-size: var(--font-size-3xl); /* Same as mobile */
  }
  
  .contact-number {
    font-size: var(--font-size-lg); /* Same as mobile */
  }
  
  .status-text {
    font-size: var(--font-size-lg); /* Same as mobile */
  }
  
  #timerDisplay {
    font-size: var(--font-size-xl); /* Same as mobile */
  }
  
  .action-btn {
    width: 70px; /* Same as mobile */
    height: 70px;
  }
  
  .action-icon {
    font-size: 1.4rem; /* Same as mobile */
  }
  
  .action-label {
    font-size: 0.7rem; /* Same as mobile */
  }
  
  .end-call-btn {
    width: 80px; /* Same as mobile */
    height: 80px;
  }
  
  .end-call-icon {
    font-size: 1.8rem; /* Same as mobile */
  }
  
  .call-actions {
    margin-bottom: 40px;
    gap: 2rem;
  }
  
  .action-buttons-row {
    gap: 2.5rem;
  }
  
  /* iPhone Keypad for Desktop */
  .iphone-keypad {
    position: fixed;
    bottom: 50%;
    left: 50%;
    right: auto;
    transform: translate(-50%, 50%) translateY(100%);
    width: 350px;
    border-radius: 20px;
    background: rgba(0, 0, 0, 0.95);
  }
  
  .iphone-keypad.show {
    transform: translate(-50%, 50%) translateY(0);
  }
  
  /* Keypad and action buttons removed */
}

/* Large Desktop (1200px+) - Keep mobile-style interface */
@media screen and (min-width: 1200px) {
  .call-screen {
    max-width: 375px; /* Keep iPhone-style width */
    height: 100vh; /* Full height like mobile */
    padding: var(--spacing-2xl) var(--spacing-lg); /* Same as mobile */
  }
  
  .avatar-circle {
    width: 120px; /* Same as mobile */
    height: 120px;
  }
  
  .avatar-icon {
    font-size: 3rem; /* Same as mobile */
  }
  
  .contact-name {
    font-size: var(--font-size-3xl); /* Same as mobile */
  }
  
  .contact-number {
    font-size: var(--font-size-lg); /* Same as mobile */
  }
  
  .status-text {
    font-size: var(--font-size-lg); /* Same as mobile */
  }
  
  #timerDisplay {
    font-size: var(--font-size-xl); /* Same as mobile */
  }
  
  .action-btn {
    width: 70px; /* Same as mobile */
    height: 70px;
  }
  
  .action-icon {
    font-size: 1.4rem; /* Same as mobile */
  }
  
  .end-call-btn {
    width: 80px; /* Same as mobile */
    height: 80px;
  }
  
  .end-call-icon {
    font-size: 1.8rem; /* Same as mobile */
  }
  
  .iphone-keypad {
    width: 320px; /* Same as mobile */
  }
  
  .iphone-keypad .dtmf-grid {
    max-width: 280px; /* Same as mobile */
  }
  
  .iphone-keypad .dtmf-btn {
    width: 75px; /* Same as mobile */
    height: 75px;
  }
  
  .iphone-keypad .dtmf-number {
    font-size: 1.5rem; /* Same as mobile */
  }
}

/* Landscape Orientation for Mobile */
@media screen and (max-height: 500px) and (orientation: landscape) {
  .call-screen {
    height: 100vh;
    padding: 1rem;
    justify-content: space-around;
  }
  
  .contact-display {
    margin-top: 20px;
    flex: 0;
  }
  
  .avatar-circle {
    width: 80px;
    height: 80px;
  }
  
  .avatar-icon {
    font-size: 2rem;
  }
  
  .contact-name {
    font-size: 1.4rem;
  }
  
  .contact-number {
    font-size: 0.9rem;
  }
  
  .call-status-area {
    margin: 1rem 0;
  }
  
  .status-text {
    font-size: 0.9rem;
  }
  
  #timerDisplay {
    font-size: 1rem;
  }
  
  .call-actions {
    margin-bottom: 20px;
    gap: 1rem;
  }
  
  /* Action buttons removed */
  
  .end-call-btn {
    width: 60px;
    height: 60px;
  }
  
  .end-call-icon {
    font-size: 1.5rem;
  }
}

/* Touch Target Optimization */
@media (pointer: coarse) {
  .action-btn,
  .end-call-btn,
  .iphone-keypad .dtmf-btn,
  .keypad-close-btn {
    min-width: 44px;
    min-height: 44px;
  }
}

/* High DPI Displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .avatar-circle,
  .action-btn,
  .end-call-btn,
  .iphone-keypad .dtmf-btn {
    border-width: 0.5px;
  }
}

/* ===== PRINT STYLES ===== */
@media print {
  .dtmf-section {
    display: none;
  }
  
  .app-container {
    box-shadow: none;
  }
  
  .btn {
    border: 1px solid var(--text-primary);
    background: transparent !important;
    color: var(--text-primary) !important;
  }
  
  .iphone-call-interface {
    display: none;
  }
}