:root {
  --bg1: #355da8;
  --bg2: #2a4a87;
  --card: #fff;
  --accent: #1EB1E6;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #1a1a1a;
    --text-primary: #e0e0e0;
  }
}

@media (max-width: 520px) {
  .photo-wrapper {
    flex-direction: column;
    gap: 8px;
  }
  
  .photo-wrapper input[type="file"] {
    width: 100%;
    font-size: 0.9rem;
    text-align: center;
  }
  
  .photo-wrapper input[type="file"]::-webkit-file-upload-button {
    width: 100%;
    margin: 0 0 6px 0;
    padding: 10px;
    font-size: 0.95rem;
  }
}

* {
  box-sizing: border-box;
}

html, body {
  height: auto;          /* allow auto height */
  min-height: 100%;      /* page grows with content */
  margin: 0;
}

body {
  display: block;        /* no flex! */
  padding: 20px;
  font-family: "Ubuntu", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  background: linear-gradient(135deg, var(--bg1) 0%, var(--bg2) 100%);
  color: #222;
}

.center {
  width: 100%;
  max-width: 760px;
  margin: 0 auto;        /* center horizontally only */
}

.card {
  background: var(--card);
  border-radius: 14px;
  padding: 28px;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.18);
}

h1 {
  margin: 0 0 18px 0;
  font-weight: 500;
  font-size: 1.6rem;
  text-align: center;
  color: #1b2a4a;
}

.section {
  margin-top: 14px;
}

label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: #3b4a63;
}

.row {
  display: flex;
  gap: 10px;
}

input[type="text"], input[type="file"] {
  font-size: 1rem;
  padding: 12px;
  border-radius: 8px;
  border: 1px solid #e3e6ee;
  flex: 1;
  background: #fafafa;
}

input[type="file"] {
  padding: 10px;
}

.btn {
  appearance: none;
  padding: 10px 14px;
  border-radius: 10px;
  border: 2px solid var(--accent);
  background: transparent;
  color: var(--accent);
  font-weight: 600;
  cursor: pointer;
}

.btn.primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.btn.secondary {
  border-color: #888;
  color: #444;
}

.btn.submit {
  width: 100%;
  margin-top: 12px;
  background: #355da8;
  color: #fff;
  border-color: #355da8;
}

.error {
  color: #c53030;
  margin-top: 6px;
  font-size: .95rem;
}

.muted {
  color: #6b7280;
  margin-top: 8px;
  font-size: .95rem;
}

.photo-wrapper {
  margin-top: 6px;
  padding: 20px 12px;
  border-radius: 10px;
  border: 2px dashed #d9e8f9;
  background: #fbfdff;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60px;
  transition: all 0.3s ease;
}

.photo-wrapper:hover:not(.disabled) {
  border-color: var(--accent);
  background: #f0f9ff;
}

.photo-wrapper.disabled {
  opacity: 0.45;
  pointer-events: none;
}

.photo-wrapper input[type="file"] {
  position: static;
  opacity: 1;
  background: transparent;
  border: none;
  padding: 8px;
  cursor: pointer;
}

.photo-wrapper input[type="file"]::-webkit-file-upload-button {
  background: var(--accent);
  color: white;
  border: none;
  padding: 8px 16px;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 500;
  margin-right: 10px;
}

.photo-wrapper input[type="file"]::-webkit-file-upload-button:hover {
  background: #1a9bc7;
}

.preview-area {
  margin-top: 12px;
  text-align: center;
  max-width: 100%;
}

.preview-area h3 {
  margin: 0 0 12px 0;
  font-size: 1.1rem;
  color: #3b4a63;
  font-weight: 500;
}

.preview-area img {
  max-width: 320px;
  max-height: 420px;
  border-radius: 8px;
  border: 2px solid rgba(53, 93, 168, 0.18);
}

.preview-area img:not(.cropped-preview) {
  max-width: 100%;
  height: auto;
}

.preview-area img.cropped-preview {
  max-width: 240px;
  max-height: 320px;
  border: 3px solid var(--accent);
  box-shadow: 0 8px 25px rgba(30, 177, 230, 0.2);
}

.preview-area .cropper-container {
  margin: 0 auto 16px auto;
  max-width: 100%;
  max-height: 500px;
}

.preview-controls {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-top: 12px;
  flex-wrap: wrap;
}

.preview-controls .btn {
  min-width: 140px;
}

/* Success message styling */
.success-msg {
  background: #d4edda;
  color: #155724;
  padding: 8px 12px;
  border-radius: 6px;
  margin-top: 10px;
  font-size: 0.9rem;
  border: 1px solid #c3e6cb;
}

/* Button success state */
.btn.success {
  background: #28a745;
  border-color: #28a745;
  color: #fff;
  pointer-events: none;
}

/* Loading state for cropper */
.preview-area.loading::after {
  content: 'Обработка изображения...';
  display: block;
  color: #6b7280;
  font-style: italic;
  margin-top: 10px;
}

/* Error states for cropper */
.cropper-error {
  background: #f8d7da;
  color: #721c24;
  padding: 12px;
  border-radius: 8px;
  margin-top: 10px;
  border: 1px solid #f5c6cb;
}

/* Cropper.js theme customization */
.cropper-container {
  background: #f8f9fa;
}

.cropper-view-box {
  outline-color: var(--accent);
}

.cropper-face {
  background-color: rgba(30, 177, 230, 0.1);
}

.cropper-line {
  background-color: var(--accent);
}

.cropper-point {
  background-color: var(--accent);
  width: 8px;
  height: 8px;
}

.cropper-point.point-se {
  background-color: #fff;
  border: 2px solid var(--accent);
}

.cropper-crop-box {
  border-color: var(--accent);
}

.cropper-dashed {
  border-color: rgba(30, 177, 230, 0.5);
}

.cropper-center {
  background-color: var(--accent);
}

.cropper-modal {
  background-color: rgba(0, 0, 0, 0.6);
}

@media (max-width: 520px) {
  .row {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
  }
  
  .preview-area img {
    max-width: 100%;
  }
  
  .preview-area .cropper-container {
    max-height: 400px;
  }
  
  .preview-area img.cropped-preview {
    max-width: 180px;
    max-height: 240px;
  }
  
  .preview-controls {
    flex-direction: column;
    align-items: center;
  }
  
  .preview-controls .btn {
    width: 100%;
    max-width: 280px;
  }
}

/* Instructions section specific styles */
.instructions-content {
  background: #f8f9fa;
  padding: 15px;
  border-radius: 8px;
  margin-bottom: 20px;
}

.video-link {
  margin: 15px 0;
  text-align: center;
}

.video-btn {
  background: #FF0000 !important;
  color: white !important;
  border-color: #FF0000 !important;
  padding: 12px 20px;
  text-decoration: none;
  display: inline-block;
  font-size: 1rem;
  transition: background-color 0.3s ease;
}

.video-btn:hover {
  background: #CC0000 !important;
  border-color: #CC0000 !important;
}

.section h3 {
  margin: 0 0 15px 0;
  color: #333;
}

#instructions {
  border-bottom: 1px solid #e0e0e0;
  padding-bottom: 20px;
  margin-bottom: 20px;
}