:root {
  /* Colors */
  --bg-dark: #0a0a0a;
  --bg-darker: #050505;
  --bg-card: rgba(30, 30, 30, 0.8);
  --bg-card-hover: rgba(40, 40, 40, 0.9);
  --text-primary: #ffffff;
  --text-secondary: #b3b3b3;
  --text-tertiary: #808080;
  --border-color: rgba(255, 255, 255, 0.1);
  --accent-primary: #25D366;
  --accent-secondary: #128C7E;
  --error-color: #ff4444;
  --success-color: #00C851;
  --warning-color: #ffbb33;
  
  /* Effects */
  --blur-amount: 10px;
  --blur-strong: 20px;
  --transition-speed: 0.3s;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.6);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: linear-gradient(180deg, var(--bg-darker) 0%, var(--bg-dark) 100%);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}

#app {
  max-width: 480px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding-bottom: 80px;
}

/* Glassmorphism Effects */
.glassmorphism {
  background: var(--bg-card);
  backdrop-filter: blur(var(--blur-amount));
  -webkit-backdrop-filter: blur(var(--blur-amount));
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
}

.glass-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 10, 0.95);
  backdrop-filter: blur(var(--blur-strong));
  -webkit-backdrop-filter: blur(var(--blur-strong));
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
}

.glass-header h1 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
}

.header-stats {
  display: flex;
  gap: 12px;
}

.stat-badge {
  display: flex;
  flex-direction: column;
  padding: 8px 16px;
  background: var(--bg-card);
  border-radius: 12px;
  border: 1px solid var(--border-color);
}

.stat-value {
  font-size: 20px;
  font-weight: 700;
  color: var(--accent-primary);
}

.stat-label {
  font-size: 11px;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Main Content */
main.tab-content {
  flex: 1;
  padding: 20px;
}

.tab-pane {
  display: none;
  animation: fadeIn 0.3s ease;
}

.tab-pane.active {
  display: block;
}

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

/* Search and Filter Bar */
.search-filter-bar {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
}

.search-box {
  flex: 4;
  position: relative;
}

.search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: #ffffff;
  pointer-events: none;
  z-index: 1;
}

.glass-input,
.glass-select,
.glass-textarea {
  width: 100%;
  background: rgba(40, 40, 40, 0.85);
  backdrop-filter: blur(var(--blur-amount));
  -webkit-backdrop-filter: blur(var(--blur-amount));
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  padding: 12px 16px;
  color: #ffffff;
  font-size: 15px;
  transition: all var(--transition-speed);
  outline: none;
}

.search-box .glass-input {
  padding-left: 44px;
  font-weight: 400;
}

.glass-input::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.glass-input:focus,
.glass-select:focus,
.glass-textarea:focus {
  border-color: var(--accent-primary);
  background: rgba(50, 50, 50, 0.95);
}

.glass-select {
  flex: 1;
  min-width: 140px;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L6 6L11 1' stroke='%23808080' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

/* Prospects List */
.prospects-list,
.messages-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.prospect-card {
  background: var(--bg-card);
  backdrop-filter: blur(var(--blur-amount));
  -webkit-backdrop-filter: blur(var(--blur-amount));
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 16px;
  transition: all var(--transition-speed);
  box-shadow: var(--shadow-sm);
}

.prospect-card:active {
  transform: scale(0.98);
}

.prospect-header {
  display: flex;
  justify-content: space-between;
  align-items: start;
  margin-bottom: 12px;
}

.prospect-info h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 4px;
}

.prospect-type {
  font-size: 13px;
  color: var(--text-secondary);
}

.status-badges {
  display: flex;
  gap: 6px;
  align-items: center;
}

.badge {
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-new {
  background: rgba(37, 211, 102, 0.2);
  color: var(--accent-primary);
  border: 1px solid rgba(37, 211, 102, 0.3);
}

.badge-contacted {
  background: rgba(0, 200, 81, 0.2);
  color: var(--success-color);
  border: 1px solid rgba(0, 200, 81, 0.3);
}

.badge-replied {
  background: rgba(255, 187, 51, 0.2);
  color: var(--warning-color);
  border: 1px solid rgba(255, 187, 51, 0.3);
}

.prospect-details {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-top: 12px;
  border-top: 1px solid var(--border-color);
}

.detail-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
}

.detail-row svg {
  width: 16px;
  height: 16px;
  color: var(--text-tertiary);
}

.status-icons {
  display: flex;
  gap: 12px;
  margin-top: 8px;
}

.status-icon {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  color: var(--text-tertiary);
}

.status-icon.sent {
  color: var(--success-color);
}

.status-icon svg {
  width: 14px;
  height: 14px;
}

/* Form Styles */
.glass-form {
  background: var(--bg-card);
  backdrop-filter: blur(var(--blur-amount));
  -webkit-backdrop-filter: blur(var(--blur-amount));
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 24px;
  box-shadow: var(--shadow-lg);
}

.glass-form h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-group .error-message {
  display: none;
  color: var(--error-color);
  font-size: 12px;
  margin-top: 6px;
}

.form-group.error .glass-input,
.form-group.error .glass-select,
.form-group.error .glass-textarea {
  border-color: var(--error-color);
}

.form-group.error .error-message {
  display: block;
}

.glass-textarea {
  resize: vertical;
  min-height: 100px;
  font-family: inherit;
}

/* Buttons */
.btn-primary,
.btn-secondary,
.btn-success,
.btn-warning {
  width: 100%;
  padding: 16px 24px;
  border: none;
  border-radius: 14px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-speed);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 52px;
  touch-action: manipulation;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: white;
  box-shadow: 0 4px 16px rgba(37, 211, 102, 0.3);
}

.btn-primary:active {
  transform: scale(0.97);
  box-shadow: 0 2px 8px rgba(37, 211, 102, 0.4);
}

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

.btn-success {
  background: linear-gradient(135deg, #00C851, #007E33);
  color: white;
  box-shadow: 0 4px 16px rgba(0, 200, 81, 0.3);
}

.btn-warning {
  background: linear-gradient(135deg, #ffbb33, #ff8800);
  color: white;
  box-shadow: 0 4px 16px rgba(255, 187, 51, 0.3);
}

.btn-primary:disabled,
.btn-secondary:disabled,
.btn-success:disabled,
.btn-warning:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary.loading,
.btn-success.loading,
.btn-warning.loading {
  position: relative;
  color: transparent;
}

.btn-primary.loading::after,
.btn-success.loading::after,
.btn-warning.loading::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* Messages Tab */
.messages-header {
  margin-bottom: 24px;
}

.messages-header h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 4px;
}

.messages-header .subtitle {
  font-size: 14px;
  color: var(--text-secondary);
}

.message-card {
  background: var(--bg-card);
  backdrop-filter: blur(var(--blur-amount));
  -webkit-backdrop-filter: blur(var(--blur-amount));
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 16px;
  box-shadow: var(--shadow-sm);
}

.message-card-header {
  margin-bottom: 16px;
}

.message-card-header h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 4px;
}

.message-card-header p {
  font-size: 13px;
  color: var(--text-secondary);
}

.message-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.message-status {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px;
  background: rgba(0, 200, 81, 0.1);
  border-radius: 12px;
  border: 1px solid rgba(0, 200, 81, 0.2);
}

.message-status svg {
  width: 20px;
  height: 20px;
  color: var(--success-color);
}

.message-status-text {
  flex: 1;
}

.message-status-text strong {
  display: block;
  font-size: 14px;
  color: var(--success-color);
}

.message-status-text span {
  font-size: 12px;
  color: var(--text-tertiary);
}

/* Bottom Tab Navigation */
.bottom-tabs {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  max-width: 480px;
  margin: 0 auto;
  display: flex;
  justify-content: space-around;
  background: rgba(10, 10, 10, 0.95);
  backdrop-filter: blur(var(--blur-strong));
  -webkit-backdrop-filter: blur(var(--blur-strong));
  border-top: 1px solid var(--border-color);
  padding: 8px 0 calc(8px + env(safe-area-inset-bottom));
  z-index: 1000;
  box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.5);
}

.tab-btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 8px 12px;
  background: none;
  border: none;
  color: var(--text-tertiary);
  cursor: pointer;
  transition: all var(--transition-speed);
  position: relative;
  touch-action: manipulation;
  min-height: 60px;
}

.tab-btn svg {
  width: 24px;
  height: 24px;
  transition: all var(--transition-speed);
}

.tab-btn span {
  font-size: 11px;
  font-weight: 500;
}

.tab-btn.active {
  color: var(--accent-primary);
}

.tab-btn.active::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 3px;
  background: var(--accent-primary);
  border-radius: 0 0 3px 3px;
}

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

/* Toast Notification */
.toast {
  position: fixed;
  bottom: 100px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--bg-card);
  backdrop-filter: blur(var(--blur-strong));
  -webkit-backdrop-filter: blur(var(--blur-strong));
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 16px 24px;
  box-shadow: var(--shadow-lg);
  z-index: 2000;
  opacity: 0;
  transition: all var(--transition-speed);
  max-width: 90%;
  text-align: center;
  font-size: 14px;
  font-weight: 500;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.toast.success {
  border-color: var(--success-color);
  color: var(--success-color);
}

.toast.error {
  border-color: var(--error-color);
  color: var(--error-color);
}

/* Skeleton Loading */
.skeleton-loader {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.skeleton-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 16px;
  height: 120px;
  position: relative;
  overflow: hidden;
}

.skeleton-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.05),
    transparent
  );
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  to {
    left: 100%;
  }
}

/* Responsive */
@media (max-width: 360px) {
  .glass-header {
    padding: 12px 16px;
  }
  
  .glass-header h1 {
    font-size: 20px;
  }
  
  main.tab-content {
    padding: 16px;
  }
  
  .glass-form {
    padding: 20px;
  }
}

/* Pull to Refresh Indicator */
.ptr-indicator {
  position: absolute;
  top: -60px;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s;
}

.ptr-indicator svg {
  width: 24px;
  height: 24px;
  color: var(--accent-primary);
  animation: spin 1s linear infinite;
}

/* Safe Area for iOS */
@supports (padding: env(safe-area-inset-bottom)) {
  .bottom-tabs {
    padding-bottom: calc(8px + env(safe-area-inset-bottom));
  }
}

/* Modal Styles */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 10000;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: fadeIn 0.3s ease;
}

.modal.show {
  display: flex;
}

.modal-content {
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  animation: slideUp 0.3s ease;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.modal-header h2 {
  margin: 0;
  font-size: 22px;
  color: var(--text-primary);
}

.modal-close {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  font-size: 18px;
  font-weight: 600;
  transition: all var(--transition-speed);
}

.modal-close:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.modal-actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
}

.modal-actions button {
  flex: 1;
  padding: 14px 24px;
  border-radius: 12px;
  font-weight: 500;
  font-size: 15px;
  cursor: pointer;
  transition: all var(--transition-speed);
  border: 1px solid var(--border-color);
}

.modal-actions button[type="button"] {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-secondary);
}

.modal-actions button[type="button"]:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--text-secondary);
}

.modal-actions button[type="submit"] {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: white;
  border-color: var(--accent-primary);
}

.modal-actions button[type="submit"]:hover {
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.3);
  transform: translateY(-1px);
}

/* Prospect Actions */
.prospect-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border-color);
}

.btn-icon {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-speed);
  color: var(--text-secondary);
}

.btn-icon:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  transform: translateY(-2px);
}

.btn-icon.btn-danger:hover {
  border-color: var(--error-color);
  color: var(--error-color);
  background: rgba(239, 68, 68, 0.1);
}

.btn-icon:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-icon:disabled:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--border-color);
  color: var(--text-secondary);
  transform: none;
}

.btn-icon svg {
  width: 18px;
  height: 18px;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive Modal */
@media (max-width: 480px) {
  .modal {
    padding: 12px;
  }
  
  .modal-content {
    max-height: 85vh;
  }
  
  .modal-actions {
    flex-direction: column;
  }
  
  .modal-actions button {
    width: 100%;
  }
}

/* Logout Button */
.logout-btn {
  background: rgba(244, 67, 54, 0.15);
  border: 1px solid rgba(244, 67, 54, 0.3);
  color: #f44336;
  border-radius: 10px;
  padding: 8px 12px;
  cursor: pointer;
  transition: all var(--transition-speed);
  display: flex;
  align-items: center;
  justify-content: center;
}

.logout-btn:hover {
  background: rgba(244, 67, 54, 0.25);
  border-color: rgba(244, 67, 54, 0.5);
  transform: translateY(-2px);
}

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