html {
  font-size: 80%;
  overflow-y: scroll;
}

:root {
  --bg-color: #f8f9fa;
  --text-color: #212529;
  --header-bg: #ffffff;
  --header-text: #212529;
  --card-bg: #fff;
  --timeline-bg: #fff;
  --form-bg: #fff;
  --border-color: #000000dd;
  --accent-color: #4d94d1;
  --name-color: #2c577e;
  --stroke-color: #08314b;
  --accent-gradient: linear-gradient(135deg, #9b56e0 0%, #75b2e8 100%);
  --tag-bg: #d1eff2;
  --shadow-color: rgba(0, 0, 0, 0.1);
  --hover-color: #9b56e0;
  --chat-bg: #fff;
  --user-message-bg: #a9deff;
  --bot-message-bg: #f0f2f5;
}

[data-theme="dark"] {
  --bg-color: #121212;
  --text-color: #e9ecef;
  --header-bg: #1c1c1e;
  --header-text: #e9ecef;
  --card-bg: #1e1e1e;
  --timeline-bg: #1e1e1e;
  --form-bg: #1e1e1e;
  --border-color: #000000;
  --accent-color: #804394;
  --name-color: #491d5d;
  --stroke-color: #ffffff;
  --accent-gradient: linear-gradient(135deg, #75b2e8 0%, #9b56e0 100%);
  --tag-bg: #263343;
  --shadow-color: rgba(0, 0, 0, 0.3);
  --hover-color: #183f61;
  --chat-bg: #1e1e1e;
  --user-message-bg: #4a2656;
  --bot-message-bg: #2a2a2a;
}
  
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Kanit", sans-serif;
}
  
body {

  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.7;
  transition: background-color 0.3s ease, color 0.3s ease;
}
  

.theme-toggle {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  transition: transform 0.3s ease;
  position: relative;
}

.theme-toggle:hover {
  transform: scale(1.2);
}

.theme-switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 32px;
}

.theme-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

/* White mode*/
.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #8ac0e2;
  transition: background-color 0.4s;
  border-radius: 34px;
}

/*Sun in white mode*/
.slider:before {
  content: "";
  position: absolute;
  height: 24px;
  width: 24px;
  top: 4px;
  left: 4px;
  background-color: #fbf785; 
  border-radius: 50%;
  transition: transform 0.4s;
  transform: translateX(0);
  z-index: 2;
}

.slider:after {
  content: "";
  position: absolute;
  height: 24px;
  width: 24px;
  top: 4px;
  left: 4px;
  background-color: transparent;
  border-radius: 50%;
  transition: transform 0.4s, opacity 0.4s;
  transform: translateX(0);
  z-index: 3;
  opacity: 0;
}

/* Dark mode*/
input:checked + .slider {
  background-color: #2e2c4a;
}

input:checked + .slider:before {
  transform: translateX(28px);
  background-color: #fbf785;
}

input:checked + .slider:after {
  transform: translateX(20px);
  opacity: 1;
  background-color: #2e2c4a;
}

@keyframes slideIn {
  from { transform: translateY(-50px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}


/* Header */
.header-bar {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding: 1rem;
    height: 80px;
    background-color: var(--header-bg);
}

.page-title {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    font-size: 2rem;
    font-weight: 500;
    color: var(--text-color);
    text-transform: uppercase;
    letter-spacing: 0.2rem;
    margin: 0;
}

/* Main container */
.main-container {
  padding: 2rem;
  min-height: calc(100vh - 100px);
}

/* Cards */
.upload-card, .results-card {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 8px 20px var(--shadow-color);
  border: 1px solid var(--name-color);
  transition: all 0.3s ease;
  height: fit-content;
}

/* Card headers */
.card-header {
  text-align: center;
  margin-bottom: 2rem;
}

.upload-icon {
  font-size: 3rem;
  color: var(--bg-color);
  margin-bottom: 1rem;
}

.card-header h3 {
  font-family: 'Kanit', sans-serif;
  font-size: 1.5rem;
  font-weight: bold;
  margin-bottom: 0.5rem;
  color: var(--text-color);
}

.card-header p {
  color: var(--text-color);
  font-size: 0.9rem;
  margin: 0;
}

/* Form */
.form-group {
  margin-bottom: 1rem;
}

.form-label {
  display: flex;
  align-items: center;
  gap: 0.1rem;
  font-weight: bold;
  margin-bottom: 1rem;
  color: var(--text-color);
}

.form-label i {
  color: var(--accent-color);
}

/* Thickness selector */
.thickness-selector {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.thickness-radio {
  display: none;
}

.thickness-option {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1.5rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
  text-align: center;
  background: var(--bg-color);
}

.thickness-option:hover {
  transform: translateY(-2px);
  border-color: var(--accent-color);
}

.thickness-radio:checked + .thickness-option {
  border-color: var(--name-color);
  background: var(--bg-color);
  color: var(--text-color);
}

.thickness-preview {
  width: 40px;
  height: 6px;
  border-radius: 3px;
  margin-bottom: 0.3rem;
  background: var(--accent-color);
}

.thin-preview { height: 3px; }
.medium-preview { height: 6px; }
.thick-preview { height: 9px; }

.thickness-option span {
  font-weight: bold;
  margin-bottom: 0.1rem;
}

.thickness-option small {
  font-weight: bold;
  font-size: 0.9rem;
  line-height: 1.1;
}

/* File upload */
.file-upload-wrapper {
  position: relative;
}

.file-input {
  display: none;
}

.file-upload-area {
  border: 2px dashed var(--name-color);
  border-radius: 8px;
  padding: 1.5rem 1rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
  background: var(--form-bg);
}

.file-upload-area:hover,
.file-upload-area.dragover {
  border-color: var(--accent-color);
  background: var(--bg-color);
  color: var(--text-color);
}

.upload-cloud {
  font-size: 2rem;
  color: var(--accent-color);
  margin-bottom: 0.5rem;
}

.upload-content h4 {
  font-weight: bold;
  margin-bottom: 0.3rem;
  color: var(--text-color);
  font-size: 1.1rem;
}

.upload-content p {
  color: var(--text-color);
  margin-bottom: 0.3rem;
  font-size: 0.9rem;
}

.browse-text {
  color: var(--accent-color);
  font-weight: bold;
  text-decoration: underline;
}

.upload-content small {
  color: var(--text-color);
  opacity: 0.7;
  font-size: 0.75rem;
}

/* File preview */
.file-preview {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--shadow-color);
  border-radius: 8px;
}

.file-preview img {
  width: 60px;
  height: 60px;
  object-fit: cover;
  border-radius: 4px;
}

.file-info {
  flex: 1;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.remove-file {
  background: transparent;
  border: none;
  color: var(--accent-color-color);
  padding: 0.5rem;
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.3s ease;
}

.remove-file:hover {
  transform: scale(1.2);
}

/* Sample images */
.sample-section {
  margin-top: 1.5rem;
  text-align: center;
}

.sample-divider {
  display: flex;
  align-items: center;
  font-weight: bold;
  margin: 2.5rem 0 1rem 0;
  color: var(--text-color);
  opacity: 0.7;
  font-size: 1rem;
}

.sample-divider::before,
.sample-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--stroke-color);
}

.sample-divider span {
  padding: 0 1rem;
  background: var(--card-bg);
  color: var(--text-color);
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 0.25rem 0;
}

.sample-images {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.8rem;
}

.sample-image {
  aspect-ratio: 1;
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
  transition: all 0.3s ease;
  border: 2px solid transparent;
  position: relative;
}

.sample-image:hover {
  transform: translateY(-2px);
  border-color: var(--accent-color);
  box-shadow: 0 4px 12px var(--shadow-color);
}

.sample-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.sample-image::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(45deg, transparent, rgba(76, 175, 80, 0.1));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.sample-image:hover::after {
  opacity: 1;
}

/* Submit button */
.submit-btn {
  width: 100%;
  padding: 0.8rem 2rem;
  margin-top: 10px;
  background-color: var(--accent-color);
  border: 1px solid transparent;
  border-radius: 6px;
  color: #fff;
  font-weight: bold;
  font-size: 1.1rem;
  cursor: pointer;
  transition: all 0.3s ease;
}

.submit-btn:hover {
  background-color: var(--name-color);
  color: #fff;
}

.submit-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.submit-content,
.loading-content {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

/* Loading spinner */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top: 2px solid #fff;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Results */
.results-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.results-header i {
  color: var(--accent-color);
  font-size: 1.5rem;
}

.results-header h3 {
  font-family: 'Kanit', sans-serif;
  font-size: 1.5rem;
  font-weight: bold;
  margin: 0;
  color: var(--text-color);
}

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

.stat-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem;
  border-radius: 8px;
  background: var(--name-color);
  color: white;
  box-shadow: 0 5px 15px var(--shadow-color);
}

.stat-card.secondary {
  background: var(--name-color);
}

.stat-icon {
  font-size: 2rem;
  opacity: 0.9;
}

.stat-content h4 {
  font-size: 1.7rem;
  font-weight: 700;
  margin: 0 0 0.25rem 0;
}

.stat-content p {
  margin: 0;
  opacity: 0.9;
  font-size: 0.9rem;
}

/* Stitch breakdown */
.stitch-breakdown {
  margin-bottom: 2rem;
}

.stitch-breakdown h4 {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
  color: var(--text-color);
  font-family: 'Kanit', sans-serif;
  font-weight: bold;
}

.stitch-breakdown h4 i {
  color: var(--accent-color);
  font-size: 1.5rem;
}

.stitch-list {
  display: grid;
  gap: 0.5rem;
  grid-template-rows: repeat(2, 2fr);
  grid-auto-flow: column;
}

.stitch-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1rem;
  background: var(--tag-bg);
  border-radius: 20px;
}

.stitch-type {
  font-weight: 600;
  color: var(--text-color);
  font-size: 1.5rem;
}

.stitch-count {
  color: var(--accent-color);
  font-weight: 700;
  font-size: 1.5rem;
}

/* Image comparison */
.image-comparison {
  margin-top: 2rem;
}

.comparison-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.tab-btn {
  flex: 1;
  padding: 0.8rem 1rem;
  border: 1px solid var(--border-color);
  background: var(--form-bg);
  color: var(--text-color);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: 500;
}

.tab-btn:hover {
  background: var(--tag-bg);
  border-color: var(--accent-color);
}

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

.image-container {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 8px 25px var(--shadow-color);
}

.tab-content {
  display: none;
}

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

.result-image {
  width: 100%;
  height: auto;
  display: block;
}

/* Shake animation */
.shake {
  animation: shake 0.5s ease-in-out;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-8px); }
  40%, 80% { transform: translateX(8px); }
}