:root {
  --primary: #4361ee;
  --light: #f8f9fa;
  --dark: #212529;
  --gray: #6c757d;
  --border-color: #dee2e6;
  --card-bg: #ffffff;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-hover: 0 8px 25px rgba(0, 0, 0, 0.1);
  --radius: 12px;
  --radius-sm: 8px;
}

/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

body {
  background: #f5f7ff;
  color: var(--dark);
  min-height: 100vh;
  padding: 20px;
}

.container {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
}

/* App Card */
.app-card {
  background: white;
  border-radius: 16px;
  box-shadow: var(--shadow);
  overflow: hidden;
  padding: 40px;
  transition: all 0.3s ease;
  border: 1px solid var(--border-color);
}

/* Header */
.header {
  text-align: center;
  margin-bottom: 40px;
  padding-bottom: 20px;
  border-bottom: 2px solid var(--primary);
}

.logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 15px;
  margin-bottom: 10px;
}

.logo i {
  font-size: 2.5rem;
  color: var(--primary);
}

.logo h1 {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0;
}

.subtitle {
  font-size: 1.1rem;
  color: var(--gray);
  font-weight: 400;
  max-width: 600px;
  margin: 0 auto;
}

/* Main Content Layout */
.main-content {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 30px;
  margin-bottom: 30px;
}

@media (max-width: 1200px) {
  .main-content {
    grid-template-columns: 1fr;
  }
}

/* Card Styles */
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 25px;
  margin-bottom: 25px;
  transition: all 0.3s ease;
  border: 1px solid var(--border-color);
}

.card:hover {
  box-shadow: var(--shadow-hover);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 25px;
  flex-wrap: wrap;
  gap: 15px;
  padding-bottom: 15px;
  border-bottom: 1px solid var(--border-color);
}

.section-header h2 {
  font-size: 1.5rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--primary);
}

.section-subtitle {
  color: var(--gray);
  font-size: 0.95rem;
  margin-top: 5px;
}

/* Upload Area */
.upload-area {
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-sm);
  padding: 60px 20px;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  margin-bottom: 20px;
  background: var(--light);
}

.upload-area:hover {
  border-color: var(--primary);
  background: rgba(67, 97, 238, 0.05);
}

.upload-area i {
  font-size: 3.5rem;
  color: var(--primary);
  margin-bottom: 15px;
}

.upload-area p {
  font-size: 1.2rem;
  margin-bottom: 5px;
  color: var(--dark);
  font-weight: 500;
}

.upload-hint {
  font-size: 0.95rem;
  color: var(--gray);
  font-weight: 400;
}

.upload-area input[type="file"] {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  opacity: 0;
  cursor: pointer;
}

.upload-area.small {
  padding: 30px 20px;
  margin-bottom: 0;
}

.upload-area.small i {
  font-size: 2rem;
  margin-bottom: 10px;
}

.upload-area.small p {
  font-size: 1rem;
}

.image-preview {
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  min-height: 150px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--light);
}

.image-preview p {
  color: var(--gray);
  font-style: italic;
}

.image-preview img {
  max-width: 100%;
  max-height: 300px;
  object-fit: contain;
}

/* Controls Layout */
.controls-section {
  display: grid;
  grid-template-columns: 1fr;
  gap: 25px;
}

/* Input Groups */
.input-group {
  margin-bottom: 20px;
}

.input-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: var(--dark);
}

.input-with-unit {
  position: relative;
  display: flex;
}

.input-with-unit input {
  flex: 1;
  padding-right: 50px;
}

.input-with-unit .unit {
  position: absolute;
  right: 15px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--gray);
  font-weight: 500;
}

input[type="number"],
input[type="text"],
select {
  width: 100%;
  padding: 14px 18px;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  font-size: 1rem;
  transition: all 0.3s ease;
  background: white;
  color: var(--dark);
}

input[type="number"]:focus,
input[type="text"]:focus,
select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
}

/* Dimension Controls */
.dimension-controls {
  display: flex;
  align-items: flex-end;
  gap: 20px;
  margin-bottom: 25px;
  flex-wrap: wrap;
}

.aspect-ratio-toggle {
  margin-bottom: 8px;
}

.toggle-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 18px;
  background: var(--light);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.3s ease;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  font-weight: 600;
  color: var(--dark);
}

.toggle-btn.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.toggle-btn:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

/* Resize Method */
.resize-method {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 25px;
}

@media (max-width: 768px) {
  .resize-method {
    grid-template-columns: 1fr;
  }
}

.radio-group {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
}

.radio-option {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  padding: 10px 15px;
  border-radius: var(--radius-sm);
  border: 2px solid var(--border-color);
  transition: all 0.3s ease;
}

.radio-option:hover {
  border-color: var(--primary);
  background: rgba(67, 97, 238, 0.05);
}

.radio-option input[type="radio"]:checked + span {
  color: var(--primary);
  font-weight: 600;
}

.radio-option input[type="radio"] {
  width: auto;
  margin: 0;
}

/* Preset Sizes */
.preset-sizes {
  margin-bottom: 25px;
}

.preset-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 10px;
}

.preset-btn {
  padding: 12px 20px;
  background: var(--light);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.3s ease;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  font-weight: 600;
  color: var(--dark);
}

.preset-btn:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

/* Watermark Controls */
.toggle-switch {
  display: flex;
  align-items: center;
  gap: 10px;
}

.toggle-switch input[type="checkbox"] {
  display: none;
}

.toggle-switch label {
  position: relative;
  display: inline-block;
  width: 50px;
  height: 26px;
  background-color: var(--border-color);
  border-radius: 13px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.toggle-switch label:after {
  content: '';
  position: absolute;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background-color: white;
  top: 2px;
  left: 2px;
  transition: all 0.3s ease;
}

.toggle-switch input:checked + label {
  background-color: var(--primary);
}

.toggle-switch input:checked + label:after {
  transform: translateX(24px);
}

.watermark-controls {
  display: none;
}

#watermarkToggle:checked ~ .watermark-controls {
  display: block;
  animation: fadeIn 0.5s ease;
}

.watermark-type {
  margin-bottom: 20px;
}

.text-watermark-controls,
.image-watermark-controls {
  display: none;
}

.text-watermark-controls.active,
.image-watermark-controls.active {
  display: block;
}

.input-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

@media (max-width: 768px) {
  .input-row {
    grid-template-columns: 1fr;
  }
}

.color-picker-wrapper {
  display: flex;
  align-items: center;
  gap: 15px;
}

.color-picker-wrapper input[type="color"] {
  width: 50px;
  height: 40px;
  padding: 0;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

#colorHex {
  font-weight: 600;
  color: var(--dark);
}

.slider-container {
  display: flex;
  align-items: center;
  gap: 15px;
}

.slider-container input[type="range"] {
  flex: 1;
}

/* Position Controls */
.position-controls {
  margin-top: 25px;
}

.position-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 15px;
  max-width: 250px;
}

.position-btn {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--light);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 1.2rem;
  color: var(--dark);
}

.position-btn.active,
.position-btn:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

/* Output Section */
.output-section {
  margin-top: 20px;
}

.output-actions {
  display: flex;
  gap: 15px;
}

.preview-container {
  margin-top: 20px;
}

.canvas-container {
  position: relative;
  border-radius: var(--radius-sm);
  border: 2px solid var(--border-color);
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-bottom: 25px;
  background: var(--light);
}

#previewCanvas {
  max-width: 100%;
  max-height: 500px;
  display: none;
  border-radius: var(--radius-sm);
}

.canvas-placeholder {
  text-align: center;
  padding: 40px;
  color: var(--gray);
}

.canvas-placeholder i {
  font-size: 4rem;
  margin-bottom: 15px;
  color: var(--border-color);
}

.download-options {
  display: flex;
  flex-direction: column;
  gap: 15px;
  background: var(--light);
  padding: 20px;
  border-radius: var(--radius-sm);
  border: 2px solid var(--border-color);
}

.format-buttons {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.format-btn {
  padding: 12px 24px;
  background: white;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.3s ease;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  font-weight: 600;
  color: var(--dark);
}

.format-btn.active,
.format-btn:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.quality-control {
  display: none;
  margin-top: 15px;
}

.quality-control.active {
  display: block;
}

.quality-control input[type="range"] {
  width: 100%;
  margin-top: 10px;
}

/* Button Styles */
.btn {
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  border: none;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  text-decoration: none;
}

.btn.primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 4px 15px rgba(67, 97, 238, 0.2);
}

.btn.primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(67, 97, 238, 0.3);
}

.btn.secondary {
  background: var(--light);
  color: var(--dark);
  border: 2px solid var(--border-color);
}

.btn.secondary:hover {
  background: var(--border-color);
}

/* Footer */
.footer {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  text-align: center;
  color: var(--gray);
  font-size: 0.9rem;
}

.footer-note {
  font-size: 0.85rem;
  margin-top: 5px;
  font-style: italic;
}

/* Toast Notification */
.toast {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: var(--dark);
  color: white;
  padding: 15px 25px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  gap: 15px;
  z-index: 1000;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s ease;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast-content i {
  color: #20c997;
  font-size: 1.5rem;
}

/* Range Input Styling */
input[type="range"] {
  -webkit-appearance: none;
  height: 8px;
  background: var(--light);
  border-radius: 4px;
  outline: none;
  border: 1px solid var(--border-color);
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  transition: all 0.3s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
  background: var(--primary);
  transform: scale(1.1);
}

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

/* Responsive Design */
@media (max-width: 992px) {
  .app-card {
    padding: 25px;
  }
  
  .header {
    margin-bottom: 30px;
  }
  
  .logo h1 {
    font-size: 1.8rem;
  }
  
  .section-header {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .dimension-controls {
    flex-direction: column;
    align-items: stretch;
  }
  
  .output-actions {
    width: 100%;
    flex-direction: column;
  }
}

@media (max-width: 768px) {
  body {
    padding: 10px;
  }
  
  .app-card {
    padding: 20px;
  }
  
  .logo {
    flex-direction: column;
    gap: 10px;
  }
  
  .logo h1 {
    font-size: 1.5rem;
    text-align: center;
  }
  
  .btn {
    width: 100%;
  }
  
  .main-content {
    gap: 20px;
  }
}

/* Tool Card Styling (for homepage) */
.tool-card {
  background: white;
  border-radius: 12px;
  padding: 25px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
  border: 2px solid #e9ecef;
  transition: all 0.3s ease;
  display: flex;
  align-items: flex-start;
  gap: 20px;
}

.tool-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
  border-color: var(--primary);
}

.tool-icon {
  background: linear-gradient(135deg, var(--primary), #3a56d4);
  color: white;
  width: 60px;
  height: 60px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  flex-shrink: 0;
}

.tool-content {
  flex: 1;
}

.tool-content h3 {
  color: var(--dark);
  font-size: 1.5rem;
  margin-bottom: 10px;
  font-weight: 700;
}

.tool-content p {
  color: var(--gray);
  line-height: 1.6;
  margin-bottom: 20px;
}

.tool-content .btn {
  background: var(--primary);
  color: white;
  padding: 12px 24px;
  border-radius: 8px;
  text-decoration: none;
  display: inline-block;
  font-weight: 600;
  transition: all 0.3s ease;
}

.tool-content .btn:hover {
  background: #3a56d4;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(67, 97, 238, 0.3);
}