/* ============================================
   INTERNATIONAL CHAT - PROFESSIONAL LIGHT THEME
   Clean white base with smooth animations
   ============================================ */
:root {
  /* Primary Colors - iOS/Messenger Inspired */
  --primary: #007AFF;
  --primary-light: #5AC8FA;
  --primary-dark: #0051D5;
  --secondary: #34C759;
  --accent: #007AFF;

  /* Status Colors */
  --success: #34C759;
  --danger: #FF3B30;
  --warning: #FF9500;
  --info: #5AC8FA;

  /* Backgrounds - Clean White Theme */
  --bg-primary: #FFFFFF;
  --bg-secondary: #F7F8FA;
  --bg-surface: #FFFFFF;
  --bg-elevated: #FAFBFC;
  --bg-header: #FFFFFF;

  /* Message Bubbles */
  --bubble-sent-bg: #007AFF;
  --bubble-received-bg: #E5E5EA;

  /* Text Colors */
  --text-primary: #000000;
  --text-secondary: #65676B;
  --text-muted: #8E8E93;
  --text-inverse: #FFFFFF;

  /* Borders & Dividers */
  --border-color: #E4E6EB;
  --border-light: #F0F2F5;

  /* Shadows - Subtle & Professional */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.12);

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.25rem;
  --radius-3xl: 1.5rem;
  --radius-full: 9999px;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;

  /* Z-index */
  --z-modal: 1000;
  --z-overlay: 900;
  --z-nav: 800;
  --z-header: 700;

  /* Animation Timing */
  --transition-fast: 150ms;
  --transition-base: 200ms;
  --transition-slow: 300ms;
  --ease-out: cubic-bezier(0.33, 1, 0.68, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
}

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

html {
  height: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background: var(--bg-secondary);
  color: var(--text-primary);
  line-height: 1.5;
  height: 100%;
  overflow-x: hidden;
  -webkit-tap-highlight-color: transparent;
}

#app {
  height: 100%;
  display: flex;
  flex-direction: column;
  background: var(--bg-secondary);
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  line-height: 1.2;
  color: var(--text-primary);
}

h1 {
  font-size: 1.75rem;
}

h2 {
  font-size: 1.5rem;
}

h3 {
  font-size: 1.25rem;
}

h4 {
  font-size: 1.125rem;
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(20px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes pulse {

  0%,
  100% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.05);
  }
}

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

@keyframes ripple {
  0% {
    transform: scale(0);
    opacity: 0.5;
  }

  100% {
    transform: scale(4);
    opacity: 0;
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideUp {
  from {
    opacity: 1;
    transform: translateY(0);
  }

  to {
    opacity: 0;
    transform: translateY(-20px);
  }
}

/* ============================================
   LAYOUT COMPONENTS
   ============================================ */
.screen {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow-y: auto;
  padding-bottom: 70px;
  background: var(--bg-secondary);
  animation: fadeIn 0.2s ease;
}

.header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: var(--bg-header);
  border-bottom: 1px solid var(--border-color);
  padding: 0.75rem 1rem;
  box-shadow: var(--shadow-xs);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

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

.header-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--radius-xl);
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: var(--font-family);
  cursor: pointer;
  transition: all var(--transition-base) var(--ease-out);
  outline: none;
  overflow: hidden;
}

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

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.2);
  border-radius: inherit;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.btn:hover::before {
  opacity: 1;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  box-shadow: 0 4px 12px rgba(0, 122, 255, 0.3);
}

.btn-primary:hover {
  box-shadow: 0 6px 20px rgba(0, 122, 255, 0.4);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

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

.btn-success {
  background: var(--success);
  color: white;
  box-shadow: 0 4px 12px rgba(52, 199, 89, 0.3);
}

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

.btn-icon {
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border-radius: var(--radius-full);
  background: var(--bg-elevated);
  color: var(--text-secondary);
  box-shadow: none;
  border: 1px solid var(--border-light);
  transition: all var(--transition-base) var(--ease-out);
}

.btn-icon:hover {
  background: var(--bg-secondary);
  color: var(--primary);
  border-color: var(--primary);
  transform: scale(1.05);
}

/* ============================================
   CARDS & SURFACES
   ============================================ */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  transition: all var(--transition-base) var(--ease-out);
  box-shadow: var(--shadow-sm);
}

.card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

/* ============================================
   FORMS
   ============================================ */
.input-group {
  margin-bottom: var(--spacing-md);
}

.input-label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.input {
  width: 100%;
  padding: 0.875rem 1rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  color: var(--text-primary);
  font-size: 1rem;
  font-family: var(--font-family);
  transition: all var(--transition-base);
}

.input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.1);
}

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

/* ============================================
   BOTTOM NAVIGATION
   ============================================ */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  background: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  padding: 0.5rem 0;
  display: flex;
  justify-content: space-around;
  align-items: center;
  box-shadow: 0 -1px 4px rgba(0, 0, 0, 0.04);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  padding: 0.5rem 1rem;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.6875rem;
  font-weight: 500;
  transition: all var(--transition-base) var(--ease-out);
  cursor: pointer;
  min-width: 70px;
  border-radius: var(--radius);
  position: relative;
}

.nav-item.active {
  color: var(--primary);
}

.nav-item.active::before {
  content: '';
  position: absolute;
  bottom: -0.5rem;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  background: var(--primary);
  border-radius: 50%;
  animation: scaleIn 0.2s ease;
}

.nav-icon {
  font-size: 1.5rem;
  transition: transform var(--transition-base) var(--ease-out);
}

.nav-icon svg {
  width: 24px;
  height: 24px;
  stroke-width: 2;
}

.nav-item:active .nav-icon {
  transform: scale(0.9);
}

.nav-item:hover:not(.active) {
  color: var(--text-secondary);
  background: var(--bg-elevated);
}

/* ============================================
   LOADER
   ============================================ */
.loader-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  gap: var(--spacing-md);
  animation: fadeIn 0.3s ease;
}

.loader {
  width: 48px;
  height: 48px;
  border: 3px solid var(--border-color);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* ============================================
   MODAL & OVERLAY
   ============================================ */
.overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md);
  animation: fadeIn 0.2s ease;
}

.modal {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-2xl);
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
  animation: scaleIn 0.3s var(--ease-out);
}

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

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

.modal-footer {
  padding: var(--spacing-lg);
  border-top: 1px solid var(--border-color);
  display: flex;
  gap: var(--spacing-sm);
  justify-content: flex-end;
}

/* ============================================
   LIST ITEMS
   ============================================ */
.list {
  list-style: none;
}

.list-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.875rem 1rem;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-light);
  cursor: pointer;
  transition: all var(--transition-fast) var(--ease-out);
  animation: fadeInUp 0.2s ease;
  animation-fill-mode: both;
}

.list-item:nth-child(1) {
  animation-delay: 0.05s;
}

.list-item:nth-child(2) {
  animation-delay: 0.1s;
}

.list-item:nth-child(3) {
  animation-delay: 0.15s;
}

.list-item:nth-child(4) {
  animation-delay: 0.2s;
}

.list-item:hover {
  background: var(--bg-elevated);
}

.list-item:active {
  background: var(--bg-secondary);
  transform: scale(0.99);
}

.avatar {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 1.25rem;
  color: white;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(0, 122, 255, 0.2);
  position: relative;
}

.avatar.online::after {
  content: '';
  position: absolute;
  bottom: 2px;
  right: 2px;
  width: 12px;
  height: 12px;
  background: var(--success);
  border: 2px solid var(--bg-surface);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

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

.list-title {
  font-weight: 600;
  margin-bottom: 0.25rem;
  font-size: 1rem;
  color: var(--text-primary);
}

.list-subtitle {
  font-size: 0.875rem;
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.list-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  flex-shrink: 0;
  align-self: flex-start;
}

/* ============================================
   BADGE
   ============================================ */
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 22px;
  height: 22px;
  padding: 0 0.4375rem;
  background: var(--primary);
  color: white;
  border-radius: var(--radius-full);
  font-size: 0.6875rem;
  font-weight: 600;
  box-shadow: 0 2px 4px rgba(0, 122, 255, 0.3);
  animation: scaleIn 0.2s ease;
}

/* ============================================
   CHAT MESSAGES - iOS/MESSENGER STYLE
   ============================================ */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  background: var(--bg-secondary);
}

.message {
  display: flex;
  gap: 0.5rem;
  max-width: 75%;
  animation: fadeInUp 0.3s var(--ease-out);
  animation-fill-mode: both;
}

.message.sent {
  flex-direction: row-reverse;
  margin-left: auto;
  animation: slideInRight 0.3s var(--ease-out);
}

.message.received {
  margin-right: auto;
  animation: slideInLeft 0.3s var(--ease-out);
}

.message-bubble {
  position: relative;
  padding: 0.625rem 0.875rem;
  border-radius: var(--radius-2xl);
  font-size: 0.9375rem;
  line-height: 1.4;
  word-wrap: break-word;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast);
}

.message-bubble:hover {
  transform: scale(1.02);
}

.message.sent .message-bubble {
  background: var(--bubble-sent-bg);
  color: white;
  border-bottom-right-radius: 0.375rem;
}

.message.received .message-bubble {
  background: var(--bubble-received-bg);
  color: var(--text-primary);
  border-bottom-left-radius: 0.375rem;
}

.message-time {
  font-size: 0.6875rem;
  color: rgba(255, 255, 255, 0.7);
  margin-top: 0.25rem;
  display: inline-block;
}

.message.received .message-time {
  color: var(--text-muted);
}

/* ============================================
   CHAT INPUT - MODERN STYLE
   ============================================ */
.chat-input-container {
  position: sticky;
  bottom: 0;
  background: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  padding: 0.75rem 1rem;
  display: flex;
  gap: 0.625rem;
  align-items: flex-end;
  box-shadow: 0 -1px 4px rgba(0, 0, 0, 0.04);
}

.chat-input {
  flex: 1;
  min-height: 44px;
  max-height: 120px;
  padding: 0.75rem 1rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-3xl);
  color: var(--text-primary);
  font-family: var(--font-family);
  font-size: 0.9375rem;
  resize: none;
  overflow-y: auto;
  line-height: 1.4;
  transition: all var(--transition-base);
}

.chat-input:focus {
  outline: none;
  border-color: var(--primary);
  background: var(--bg-surface);
  box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

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

/* ============================================
   UTILITIES
   ============================================ */
.text-center {
  text-align: center;
}

.text-muted {
  color: var(--text-muted);
}

.text-secondary {
  color: var(--text-secondary);
}

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

.text-success {
  color: var(--success);
}

.text-danger {
  color: var(--danger);
}

.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.items-center {
  align-items: center;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-sm {
  gap: var(--spacing-sm);
}

.gap-md {
  gap: var(--spacing-md);
}

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

.hidden {
  display: none !important;
}

.w-full {
  width: 100%;
}

.h-full {
  height: 100%;
}

/* ============================================
   SCROLLBAR STYLING
   ============================================ */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: var(--radius-full);
}

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

/* ============================================
   FLOATING ACTION BUTTON
   ============================================ */
.fab {
  position: fixed;
  bottom: 90px;
  right: 1rem;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  border: none;
  box-shadow: 0 4px 12px rgba(0, 122, 255, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  cursor: pointer;
  transition: all var(--transition-base) var(--ease-out);
  animation: scaleIn 0.3s var(--ease-out);
  z-index: 100;
}

.fab:hover {
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 8px 20px rgba(0, 122, 255, 0.5);
}

.fab:active {
  transform: translateY(0) scale(0.95);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  .modal {
    max-width: 100%;
    margin: auto auto 0;
    border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
  }

  .header {
    padding: 0.625rem 1rem;
  }

  .header-title {
    font-size: 1.125rem;
  }
}
/* ============================================
   WALLET COMPONENTS
   ============================================ */
.wallet-balance-card {
  margin: var(--spacing-md);
  padding: var(--spacing-xl);
  background: linear-gradient(135deg, #007AFF 0%, #0051D5 100%);
  border-radius: var(--radius-2xl);
  box-shadow: 0 8px 24px rgba(0, 122, 255, 0.25);
  color: white;
  text-align: center;
  animation: scaleIn 0.3s ease;
}

.wallet-balance-label {
  font-size: 0.875rem;
  opacity: 0.9;
  margin-bottom: var(--spacing-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.wallet-balance-amount {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.wallet-balance-note {
  font-size: 0.75rem;
  opacity: 0.8;
}

.wallet-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
  padding: 0 var(--spacing-md) var(--spacing-md);
}

.wallet-action-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-lg);
  border: none;
  border-radius: var(--radius-xl);
  font-size: 0.875rem;
  font-weight: 600;
  font-family: var(--font-family);
  cursor: pointer;
  transition: all var(--transition-base) var(--ease-out);
  box-shadow: var(--shadow-sm);
}

.wallet-action-btn svg {
  width: 24px;
  height: 24px;
}

.wallet-action-btn.primary {
  background: var(--primary);
  color: white;
}

.wallet-action-btn.primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.wallet-action-btn.secondary {
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.wallet-action-btn.secondary:hover {
  background: var(--bg-elevated);
  border-color: var(--primary);
  transform: translateY(-2px);
}

.wallet-action-btn:active {
  transform: translateY(0) scale(0.98);
}

.transaction-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--border-light);
  transition: background var(--transition-fast);
}

.transaction-item:last-child {
  border-bottom: none;
}

.transaction-item:hover {
  background: var(--bg-elevated);
}

.transaction-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 600;
  margin-right: var(--spacing-md);
  flex-shrink: 0;
}

.transaction-icon.sent {
  background: rgba(255, 59, 48, 0.1);
  color: var(--danger);
}

.transaction-icon.received {
  background: rgba(52, 199, 89, 0.1);
  color: var(--success);
}

.transaction-note {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.125rem;
}

.transaction-amount {
  font-size: 1rem;
  font-weight: 600;
  white-space: nowrap;
}

.transaction-amount.sent {
  color: var(--danger);
}

.transaction-amount.received {
  color: var(--success);
}

/* ============================================
   CALL SCREEN COMPONENTS
   ============================================ */
.call-screen {
  position: fixed;
  inset: 0;
  background: linear-gradient(135deg, #1a1a1a 0%, #0a0a0a 100%);
  display: flex;
  flex-direction: column;
  z-index: var(--z-modal);
}

.call-avatar {
  width: 120px;
  height: 120px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: white;
  margin-bottom: var(--spacing-lg);
  box-shadow: 0 8px 32px rgba(0, 122, 255, 0.4);
}

.call-controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-lg);
  padding: var(--spacing-xl);
  background: rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(20px);
}

.call-btn {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  border: none;
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-lg);
}

.call-btn-mute {
  background: rgba(255, 255, 255, 0.2);
  color: white;
}

.call-btn-mute:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: scale(1.1);
}

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

.call-btn-end:hover {
  background: #cc0000;
  transform: scale(1.1);
}

.call-btn-speaker {
  background: rgba(255, 255, 255, 0.2);
  color: white;
}

.call-btn-speaker:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: scale(1.1);
}

.video-container {
  position: relative;
  width: 100%;
  height: 100%;
  background: #000;
}

.video-remote {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-local {
  position: absolute;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  width: 120px;
  height: 160px;
  border-radius: var(--radius-xl);
  object-fit: cover;
  box-shadow: var(--shadow-xl);
  border: 2px solid rgba(255, 255, 255, 0.2);
}