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

body {
  font-family: 'Montserrat', sans-serif;
  background-color: #f8fafc;
  color: #111827;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Navigation */
.trainer-nav {
  background: white;
  border-bottom: 1px solid #e2e8f0;
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: #111827;
  font-weight: 600;
  font-size: 1.1rem;
}

.logo-img {
  height: 32px;
  width: auto;
  margin-right: 0.75rem;
}

.logo-text {
  color: #111827;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
}

.nav-link {
  color: #4f46e5;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-link:hover {
  color: #4338ca;
}

/* Main Container */
.trainer-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* Header */
.trainer-header {
  text-align: center;
  margin-bottom: 2rem;
}

.trainer-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: #111827;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

.trainer-title i {
  color: #4f46e5;
}

.trainer-subtitle {
  font-size: 1.1rem;
  color: #6b7280;
  max-width: 600px;
  margin: 0 auto;
}

/* Stats Overview */
.stats-overview {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: white;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
  transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.stat-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, #4f46e5, #7c3aed);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.25rem;
}

.stat-content {
  flex: 1;
}

.stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: #111827;
  line-height: 1.2;
}

.stat-label {
  font-size: 0.875rem;
  color: #6b7280;
  margin-top: 0.25rem;
}

/* Main Layout */
.trainer-main {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 2rem;
}

/* Sidebar */
.trainer-sidebar {
  background: white;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 1.5rem;
  height: fit-content;
  position: sticky;
  top: 100px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.sidebar-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: #111827;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sidebar-title i {
  color: #4f46e5;
}

.lessons-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.lesson-item {
  padding: 0.75rem 1rem;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
  border: 1px solid transparent;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.lesson-item:hover {
  background: #f8fafc;
  border-color: #e2e8f0;
}

.lesson-item.active {
  background: linear-gradient(135deg, #4f46e5, #7c3aed);
  color: white;
  border-color: #4338ca;
}

.lesson-item.completed {
  border-left: 3px solid #10b981;
}

.lesson-item.completed .lesson-name::after {
  content: ' ✓';
  color: #10b981;
  font-weight: 600;
}

.lesson-name {
  font-weight: 500;
  font-size: 0.95rem;
}

.lesson-progress {
  font-size: 0.75rem;
  opacity: 0.7;
  margin-top: 0.25rem;
}

/* Training Area */
.training-area {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* Lesson Info */
.lesson-info {
  background: white;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.lesson-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: #111827;
  margin-bottom: 0.5rem;
}

.lesson-description {
  color: #6b7280;
  font-size: 0.95rem;
}

/* Keyboard */
.keyboard-container {
  background: white;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.keyboard {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-family: 'Courier New', monospace;
}

.keyboard-row {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
}

.key {
  min-width: 44px;
  height: 44px;
  background: #f8fafc;
  border: 2px solid #e2e8f0;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 0.9rem;
  color: #111827;
  transition: all 0.15s;
  position: relative;
}

.key.wide {
  min-width: 88px;
}

.key.space {
  min-width: 300px;
}

.key.tab-key,
.key.backspace-key,
.key.enter-key,
.key.shift-key {
  min-width: 88px;
  font-size: 0.8rem;
}

.key-spacer {
  display: inline-block;
  height: 44px;
}

.key.active {
  background: linear-gradient(135deg, #4f46e5, #7c3aed);
  color: white;
  border-color: #4338ca;
  box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.3);
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.3);
  }
  50% {
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.5);
  }
}

.key.error {
  background: #ef4444;
  color: white;
  border-color: #dc2626;
  animation: shake 0.3s;
}

.key.correct {
  background: #10b981;
  color: white;
  border-color: #059669;
}

.key.pressed {
  background: linear-gradient(135deg, #7c3aed, #a855f7);
  color: white;
  border-color: #6d28d9;
  transform: scale(1.05);
  box-shadow: 0 4px 12px rgba(124, 58, 237, 0.4);
  transition: all 0.1s;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

/* Text Display */
.text-display-container {
  background: white;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 1.5rem;
  min-height: 120px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}


.text-display {
  font-size: 1.5rem;
  line-height: 2.2;
  font-family: 'Montserrat', sans-serif;
  font-weight: 400;
  color: #111827;
  word-wrap: break-word;
  letter-spacing: 0.03em;
  text-align: left;
}

.text-placeholder {
  color: #9ca3af;
  font-style: italic;
}

.text-char {
  display: inline-block;
  padding: 0 2px;
}

.text-char.correct {
  color: #10b981;
  background: rgba(16, 185, 129, 0.1);
}

.text-char.error {
  color: #ef4444;
  background: rgba(239, 68, 68, 0.1);
  text-decoration: underline;
}

.text-char.current {
  background: #4f46e5;
  color: white;
  border-radius: 3px;
  animation: blink 1s infinite;
}


@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0.5; }
}

/* Controls Top */
.controls-top {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 1rem;
}

/* Input Area - полностью скрыто, но функционально */
.input-area {
  position: fixed;
  top: -9999px;
  left: -9999px;
  width: 1px;
  height: 1px;
  opacity: 0;
  overflow: hidden;
  z-index: -1;
}

.input-area.active {
  pointer-events: auto;
}

.typing-input {
  width: 1px;
  height: 1px;
  padding: 0;
  border: none;
  font-size: 1px;
  font-family: 'Courier New', monospace;
  background: transparent;
  color: transparent;
  caret-color: transparent;
  outline: none;
}

.typing-input:focus {
  outline: none;
  border-color: #4f46e5;
  background: white;
}

.typing-input:disabled {
  background: #f3f4f6;
  cursor: not-allowed;
}

/* Progress */
.progress-container {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: white;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 1rem 1.5rem;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.progress-bar {
  flex: 1;
  height: 12px;
  background: #e2e8f0;
  border-radius: 6px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #4f46e5, #7c3aed);
  border-radius: 6px;
  transition: width 0.3s;
  width: 0%;
}

.progress-text {
  font-weight: 600;
  color: #4f46e5;
  min-width: 50px;
  text-align: right;
}

/* Current Stats */
.current-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
  background: white;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.current-stat {
  text-align: center;
}

.current-stat-label {
  display: block;
  font-size: 0.875rem;
  color: #6b7280;
  margin-bottom: 0.5rem;
}

.current-stat-value {
  display: block;
  font-size: 1.5rem;
  font-weight: 700;
  color: #111827;
}

.current-stat-unit {
  font-size: 0.875rem;
  color: #6b7280;
  margin-left: 0.25rem;
}

/* Controls */
.controls {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-top: 1rem;
}

.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: linear-gradient(135deg, #4f46e5, #7c3aed);
  color: white;
}

.btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, #4338ca, #6d28d9);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.btn-secondary {
  background: white;
  color: #4f46e5;
  border: 2px solid #4f46e5;
}

.btn-secondary:hover:not(:disabled) {
  background: #f8fafc;
  transform: translateY(-2px);
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.modal.active {
  display: flex;
}

.modal-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(3px);
}

.modal-content {
  background: white;
  border-radius: 12px;
  width: 90%;
  max-width: 800px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
  position: relative;
  z-index: 1001;
  transform: scale(0.95);
  opacity: 0;
  transition: all 0.3s;
}

.modal.active .modal-content {
  transform: scale(1);
  opacity: 1;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem;
  border-bottom: 1px solid #e2e8f0;
}

.modal-header h3 {
  font-size: 1.5rem;
  font-weight: 600;
  color: #111827;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.modal-header h3 i {
  color: #4f46e5;
}

.modal-close {
  background: transparent;
  border: none;
  font-size: 1.5rem;
  color: #6b7280;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 6px;
  transition: all 0.2s;
}

.modal-close:hover {
  background: #f3f4f6;
  color: #111827;
}

.modal-body {
  padding: 1.5rem;
}

.modal-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem;
  border-top: 1px solid #e2e8f0;
  margin-top: 1rem;
}

.reset-progress-info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: #6b7280;
  font-size: 0.875rem;
}

.reset-progress-info i {
  color: #4f46e5;
}

.btn-danger {
  background: linear-gradient(135deg, #ef4444, #dc2626);
  color: white;
  border: none;
}

.btn-danger:hover:not(:disabled) {
  background: linear-gradient(135deg, #dc2626, #b91c1c);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

/* Stats Tabs */
.stats-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  border-bottom: 2px solid #e2e8f0;
}

.tab-btn {
  padding: 0.75rem 1.5rem;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  font-weight: 600;
  color: #6b7280;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: -2px;
}

.tab-btn:hover {
  color: #4f46e5;
}

.tab-btn.active {
  color: #4f46e5;
  border-bottom-color: #4f46e5;
}

.tab-content {
  display: none;
}

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

/* Charts */
.chart-container {
  margin-bottom: 2rem;
  background: #f8fafc;
  border-radius: 8px;
  padding: 1rem;
}

.chart-container canvas {
  width: 100% !important;
  height: 300px !important;
}

/* History */
.history-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.history-item {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.history-item-info {
  flex: 1;
}

.history-item-title {
  font-weight: 600;
  color: #111827;
  margin-bottom: 0.25rem;
}

.history-item-meta {
  font-size: 0.875rem;
  color: #6b7280;
}

.history-item-stats {
  display: flex;
  gap: 1.5rem;
  text-align: right;
}

.history-stat {
  display: flex;
  flex-direction: column;
}

.history-stat-value {
  font-weight: 700;
  color: #111827;
  font-size: 1.1rem;
}

.history-stat-label {
  font-size: 0.75rem;
  color: #6b7280;
}

/* Responsive */
@media (max-width: 1024px) {
  .trainer-main {
    grid-template-columns: 1fr;
  }

  .trainer-sidebar {
    position: static;
  }
}

@media (max-width: 768px) {
  .trainer-title {
    font-size: 2rem;
  }

  .stats-overview {
    grid-template-columns: repeat(2, 1fr);
  }

  .keyboard-row {
    gap: 0.25rem;
  }

  .key {
    min-width: 36px;
    height: 36px;
    font-size: 0.8rem;
  }

  .key.wide {
    min-width: 72px;
  }

  .key.space {
    min-width: 200px;
  }

  .current-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .controls {
    flex-wrap: wrap;
  }

  .btn {
    flex: 1;
    min-width: 120px;
  }
}

@media (max-width: 480px) {
  .trainer-container {
    padding: 1rem;
  }

  .trainer-title {
    font-size: 1.5rem;
    flex-direction: column;
    gap: 0.5rem;
  }

  .stats-overview {
    grid-template-columns: 1fr;
  }

  .stat-card {
    padding: 1rem;
  }

  .text-display {
    font-size: 1rem;
  }

  .typing-input {
    font-size: 1rem;
  }
}