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

:root {
  --color-primary: #1e40af;
  --color-primary-hover: #1e3a8a;
  --color-primary-light: #dbeafe;
  --color-text-primary: #0f172a;
  --color-text-secondary: #475569;
  --color-text-tertiary: #94a3b8;
  --color-border: #cbd5e1;
  --color-border-focus: #1e40af;
  --color-error: #dc2626;
  --color-error-bg: #fef2f2;
  --color-success: #059669;
  --color-success-bg: #f0fdf4;
  --color-background: #ffffff;
  --color-background-secondary: #f1f5f9;
  --color-shadow: rgba(15, 23, 42, 0.1);
  --color-shadow-hover: rgba(15, 23, 42, 0.15);

  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;

  --border-radius-sm: 4px;
  --border-radius-md: 6px;
  --border-radius-lg: 8px;

  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;

  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;

  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
}

body {
  font-family: var(--font-sans);
  color: var(--color-text-primary);
  background-color: var(--color-background-secondary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.contact-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.contact-header {
  background: linear-gradient(180deg, #1e40af 0%, #1e3a8a 100%);
  color: white;
  padding: var(--spacing-3xl) var(--spacing-lg);
  text-align: center;
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.header-content {
  max-width: 800px;
  margin: 0 auto;
}

.contact-header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.02em;
}

.subtitle {
  font-size: 1.125rem;
  opacity: 0.95;
  margin-bottom: var(--spacing-lg);
  line-height: 1.5;
}

.location {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 0.9375rem;
  opacity: 0.9;
  padding: var(--spacing-sm) var(--spacing-md);
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-md);
  backdrop-filter: blur(10px);
}

.contact-main {
  flex: 1;
  padding: var(--spacing-2xl) var(--spacing-lg);
  max-width: 800px;
  margin: 0 auto;
  width: 100%;
}

.contact-form {
  background: var(--color-background);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  font-weight: 600;
  font-size: 0.9375rem;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-primary);
}

.required {
  color: var(--color-error);
}

.form-input,
.form-select {
  width: 100%;
  padding: 12px 16px;
  font-size: 1rem;
  font-family: var(--font-sans);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  background-color: var(--color-background);
  transition: all var(--transition-fast);
  color: var(--color-text-primary);
}

.form-input:hover,
.form-select:hover {
  border-color: var(--color-text-tertiary);
}

.form-input:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
}

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

.form-input.invalid:focus,
.form-select.invalid:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-select {
  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 1.5L6 6.5L11 1.5' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 48px;
}

.editor-toolbar {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-background-secondary);
  border: 1px solid var(--color-border);
  border-bottom: none;
  border-radius: var(--border-radius-md) var(--border-radius-md) 0 0;
  flex-wrap: wrap;
}

.toolbar-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: none;
  background: transparent;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
  position: relative;
}

.toolbar-btn:hover {
  background-color: var(--color-background);
  color: var(--color-text-primary);
}

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

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

.toolbar-btn.active {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

.font-size-btn {
  font-weight: 700;
  font-size: 14px;
}

.font-size-btn.small {
  font-size: 11px;
}

.font-size-input-wrapper {
  display: flex;
  align-items: center;
  gap: 4px;
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  padding: 4px 8px;
  height: 32px;
}

.font-size-input {
  width: 50px;
  border: none;
  background: transparent;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-primary);
  text-align: center;
  padding: 0;
  outline: none;
}

.font-size-input::-webkit-inner-spin-button,
.font-size-input::-webkit-outer-spin-button {
  opacity: 1;
  height: 20px;
}

.font-size-unit {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  font-weight: 500;
  user-select: none;
}

.toolbar-divider {
  width: 1px;
  height: 24px;
  background-color: var(--color-border);
  margin: 0 var(--spacing-xs);
}

.font-size-controls {
  display: flex;
  align-items: center;
  gap: 4px;
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  padding: 2px;
}

.font-size-btn-ctrl {
  width: 32px;
  height: 32px;
  min-width: 32px;
  background: transparent;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
  border-radius: var(--border-radius-sm);
}

.font-size-btn-ctrl:hover {
  background-color: var(--color-background-secondary);
  color: var(--color-text-primary);
}

.font-size-btn-ctrl:active {
  transform: scale(0.95);
}

.font-size-display-wrapper {
  min-width: 45px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 8px;
  border-left: 1px solid var(--color-border);
  border-right: 1px solid var(--color-border);
  height: 32px;
}

.font-size-display {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  letter-spacing: -0.02em;
  user-select: none;
}

.color-picker-wrapper,
.highlighter-wrapper {
  position: relative;
}

.color-input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.color-indicator,
.highlight-indicator {
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  border-radius: 2px;
  background-color: #000;
}

.highlight-indicator {
  background-color: #fdfe00;
}

.text-color-palette {
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 4px;
  padding: 8px;
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-md);
  display: none;
  gap: 6px;
  z-index: 10;
  grid-template-columns: repeat(4, 28px);
}

.text-color-palette.active {
  display: grid;
}

.text-color {
  width: 28px;
  height: 28px;
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.text-color:hover {
  transform: scale(1.1);
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(30, 64, 175, 0.2);
}

.text-color-more {
  width: 28px;
  height: 28px;
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #ff0000 0%, #ff7f00 17%, #ffff00 33%, #00ff00 50%, #0000ff 67%, #4b0082 83%, #9400d3 100%);
  color: white;
  grid-column: span 4;
}

.text-color-more:hover {
  transform: scale(1.05);
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(30, 64, 175, 0.2);
}

.text-color-more svg {
  filter: drop-shadow(0 1px 2px rgba(0,0,0,0.3));
}

.highlighter-palette {
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 4px;
  padding: 8px;
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-md);
  display: none;
  gap: 6px;
  z-index: 10;
  grid-template-columns: repeat(3, 28px);
}

.highlighter-palette.active {
  display: grid;
}

.highlight-color {
  width: 28px;
  height: 28px;
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.highlight-color svg {
  width: 14px;
  height: 14px;
  stroke: var(--color-error);
  stroke-width: 2;
}

.font-select-wrapper {
  position: relative;
}

.font-select {
  padding: 8px 32px 8px 12px;
  font-size: 0.875rem;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  background-color: var(--color-background);
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L5 5L9 1' stroke='%2364748b' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
  transition: all var(--transition-fast);
}

.font-select:hover {
  border-color: var(--color-text-tertiary);
}

.font-select:focus {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
  border-color: var(--color-border-focus);
}

.editor-wrapper {
  position: relative;
}

.form-textarea {
  min-height: 200px;
  max-height: 800px;
  height: 200px;
  overflow-y: auto;
  padding: 14px 16px;
  font-size: 1rem;
  font-family: Arial, sans-serif;
  line-height: 1.6;
  border: 1px solid var(--color-border);
  border-radius: 0 0 var(--border-radius-md) var(--border-radius-md);
  background-color: var(--color-background);
  transition: border-color var(--transition-fast);
  color: var(--color-text-primary);
  word-wrap: break-word;
  white-space: pre-wrap;
  resize: none;
  scrollbar-width: thin;
  scrollbar-color: #1e40af transparent;
}

.form-textarea::-webkit-scrollbar {
  width: 8px;
}

.form-textarea::-webkit-scrollbar-track {
  background: transparent;
}

.form-textarea::-webkit-scrollbar-thumb {
  background-color: #1e40af;
  border-radius: 0;
}

.form-textarea::-webkit-scrollbar-thumb:hover {
  background-color: #1e3a8a;
}

.form-textarea code {
  font-family: 'Courier New', Courier, monospace;
  background-color: #f1f5f9;
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 0.9em;
}

.form-textarea:empty:before {
  content: attr(data-placeholder);
  color: var(--color-text-tertiary);
}

.form-textarea:hover {
  border-color: var(--color-text-tertiary);
}

.form-textarea:focus,
.form-textarea.focused {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
}

.form-textarea.invalid {
  border-color: var(--color-error);
}

.form-textarea.invalid:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.resize-handle {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 20px;
  height: 20px;
  cursor: ns-resize;
  background: linear-gradient(135deg, transparent 50%, var(--color-border) 50%);
  border-radius: 0 0 var(--border-radius-md) 0;
}

.resize-handle:hover {
  background: linear-gradient(135deg, transparent 50%, var(--color-primary) 50%);
}

.editor-wrapper.resizing .form-textarea {
  user-select: none;
  transition: none;
}

.error-message {
  display: block;
  color: var(--color-error);
  font-size: 0.875rem;
  margin-top: var(--spacing-sm);
  min-height: 20px;
}

.form-actions {
  margin-top: var(--spacing-xl);
  display: flex;
  justify-content: flex-end;
}

.btn-primary {
  position: relative;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 600;
  font-family: var(--font-sans);
  color: white;
  background: var(--color-primary);
  border: none;
  border-radius: var(--border-radius-md);
  cursor: pointer;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
  min-width: 160px;
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
  box-shadow: var(--shadow-md);
}

.btn-primary:active:not(:disabled) {
  transform: scale(0.98);
}

.btn-primary:focus-visible {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 3px;
}

.btn-primary:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.btn-primary.loading .btn-text {
  opacity: 0;
}

.btn-primary.loading .btn-loader {
  display: block;
}

.btn-loader {
  display: none;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}

.success-notification {
  display: none;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background-color: var(--color-success-bg);
  border: 1px solid var(--color-success);
  border-radius: var(--border-radius-lg);
  color: var(--color-success);
  animation: slideIn 0.3s ease;
}

.success-notification svg {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
}

.success-notification h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--color-text-primary);
}

.success-notification p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
}

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

@media (max-width: 768px) {
  .contact-header {
    padding: var(--spacing-xl) var(--spacing-md);
  }

  .contact-header h1 {
    font-size: 2rem;
  }

  .subtitle {
    font-size: 1rem;
  }

  .contact-main {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  .contact-form {
    padding: var(--spacing-lg);
  }

  .form-group {
    margin-bottom: var(--spacing-md);
  }

  .editor-toolbar {
    gap: var(--spacing-xs);
  }

  .toolbar-btn {
    width: 32px;
    height: 32px;
  }

  .font-size-input-wrapper {
    height: 28px;
    padding: 3px 6px;
  }

  .font-size-input {
    width: 45px;
    font-size: 0.8125rem;
  }

  .font-select {
    font-size: 0.8125rem;
    padding: 6px 28px 6px 10px;
  }

  .form-actions {
    margin-top: var(--spacing-lg);
  }

  .btn-primary {
    width: 100%;
    padding: 12px 24px;
  }
}

@media (max-width: 480px) {
  .contact-header h1 {
    font-size: 1.75rem;
  }

  .contact-form {
    padding: var(--spacing-md);
  }

  .toolbar-btn {
    width: 28px;
    height: 28px;
  }

  .toolbar-btn svg {
    width: 14px;
    height: 14px;
  }

  .font-size-input-wrapper {
    height: 26px;
    padding: 2px 5px;
  }

  .font-size-input {
    width: 40px;
    font-size: 0.75rem;
  }

  .form-textarea {
    min-height: 150px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media print {
  .editor-toolbar,
  .btn-primary {
    display: none;
  }
}