* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
:root { color-scheme:dark; }

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: #04070a;
  color: #d7e8ff;
  overflow: hidden;
  height: 100vh;
}

.container {
  display: flex;
  height: 100vh;
}

/* Control Panel */
.control-panel {
  width: 320px;
  background: linear-gradient(180deg, #0a0f14 0%, #04070a 100%);
  border-right: 1px solid rgba(93, 225, 255, 0.2);
  overflow-y: auto;
  overflow-x: hidden;
  padding: 20px;
}

.control-panel::-webkit-scrollbar {
  width: 8px;
}

.control-panel::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.2);
}

.control-panel::-webkit-scrollbar-thumb {
  background: rgba(93, 225, 255, 0.3);
  border-radius: 4px;
}

.control-panel::-webkit-scrollbar-thumb:hover {
  background: rgba(93, 225, 255, 0.5);
}

header {
  margin-bottom: 20px;
  padding-bottom: 15px;
  border-bottom: 2px solid rgba(93, 225, 255, 0.2);
}

h1 {
  font-size: 1.8rem;
  color: #5de1ff;
  margin-bottom: 5px;
  text-shadow: 0 0 10px rgba(93, 225, 255, 0.3);
  justify-content: center;
  align-items: center;
  display: flex;
}

.subtitle {
  font-size: 0.85rem;
  color: #97f3d2;
  opacity: 0.9;
  justify-content: center;
  align-items: center;
  display: flex;
}

.section {
  margin-bottom: 25px;
}

.section-title {
  font-size: 0.9rem;
  color: #00d4ff;
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: bold;
}

.control-group {
  margin-bottom: 15px;
}

.control-label {
  display: block;
  font-size: 0.85rem;
  color: #97f3d2;
  margin-bottom: 6px;
}

li {margin-left: 20px; padding: 0px; margin-top: 0px; margin-bottom: 0px;}

input[type="text"],
input[type="number"],
select,
textarea {
  width: 100%;
  padding: 8px 10px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(93, 225, 255, 0.3);
  border-radius: 4px;
  color: #d7e8ff;
  font-size: 0.9rem;
  font-family: inherit;
}

textarea {
  resize: vertical;
  min-height: 60px;
  font-family: 'Segoe UI', sans-serif;
}

select, option {
  color: #d7e8ff;
  background-color: #04070a;
}

option:checked,
option:hover {
  color: #d7e8ff;
  background-color: rgba(50, 50, 50, 0.3);
}

input[type="text"]:focus,
input[type="number"]:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: #5de1ff;
  box-shadow: 0 0 8px rgba(93, 225, 255, 0.3);
}

input[type="range"] {
  width: 100%;
  height: 4px;
  background: rgba(93, 225, 255, 0.2);
  border-radius: 2px;
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  background: #5de1ff;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 0 8px rgba(93, 225, 255, 0.5);
}

input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  background: #5de1ff;
  border-radius: 50%;
  cursor: pointer;
  border: none;
  box-shadow: 0 0 8px rgba(93, 225, 255, 0.5);
}

.range-value {
  display: inline-block;
  margin-left: 10px;
  font-size: 0.85rem;
  color: #5de1ff;
  min-width: 50px;
  text-align: right;
}

.range-container {
  display: flex;
  align-items: center;
  gap: 10px;
}

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

button {
  padding: 10px 16px;
  background: linear-gradient(135deg, #5de1ff 0%, #00ffaa 100%);
  border: none;
  border-radius: 4px;
  color: #04070a;
  font-size: 0.9rem;
  font-weight: bold;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 12px rgba(93, 225, 255, 0.3);
  width: 100%;
}

button:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(93, 225, 255, 0.5);
}

button:active {
  transform: translateY(0);
}

.button-group {
  display: flex;
  gap: 8px;
  margin-bottom: 10px;
}

.button-group button {
  flex: 1;
}

.secondary-btn {
  background: linear-gradient(135deg, rgba(93, 225, 255, 0.2) 0%, rgba(0, 255, 170, 0.2) 100%);
  color: #5de1ff;
}

.danger-btn {
  background: linear-gradient(135deg, rgba(255, 93, 93, 0.3) 0%, rgba(255, 0, 85, 0.3) 100%);
  color: #ff5d5d;
}

input[type="file"] {
  display: none;
}

.file-label {
  display: block;
  padding: 10px 16px;
  background: linear-gradient(135deg, rgba(93, 225, 255, 0.2) 0%, rgba(0, 255, 170, 0.2) 100%);
  border: 1px solid rgba(93, 225, 255, 0.3);
  border-radius: 4px;
  color: #5de1ff;
  font-size: 0.9rem;
  font-weight: bold;
  cursor: pointer;
  text-align: center;
  transition: all 0.2s;
}

.file-label:hover {
  background: linear-gradient(135deg, rgba(93, 225, 255, 0.3) 0%, rgba(0, 255, 170, 0.3) 100%);
  border-color: #5de1ff;
}

.info-hint {
  font-size: 0.75rem;
  color: rgba(151, 243, 210, 0.7);
  margin-top: 4px;
}

/* Layers */
.layer-list {
  max-height: 300px;
  overflow-y: auto;
  margin-bottom: 10px;
  border: 1px solid rgba(93, 225, 255, 0.2);
  border-radius: 4px;
  background: rgba(0, 0, 0, 0.2);
}

.layer-item {
  padding: 10px;
  border-bottom: 1px solid rgba(93, 225, 255, 0.1);
  cursor: pointer;
  transition: background 0.2s;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.layer-item:hover {
  background: rgba(93, 225, 255, 0.05);
}

.layer-item.active {
  background: rgba(93, 225, 255, 0.15);
  border-left: 3px solid #5de1ff;
}

.layer-info {
  width: 100%;
}

.layer-name {
  font-size: 0.9rem;
  color: #d7e8ff;
  font-weight: bold;
  margin-bottom: 2px;
}

.layer-details {
  font-size: 0.75rem;
  color: rgba(151, 243, 210, 0.7);
}

.layer-delete {
  width: 100%;
  padding: 6px 10px;
  background: rgba(255, 93, 93, 0.2);
  border: 1px solid rgba(255, 93, 93, 0.3);
  border-radius: 3px;
  color: #ff5d5d;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.2s;
  text-align: center;
}

.layer-delete:hover {
  background: rgba(255, 93, 93, 0.3);
}

/* Preview Panel */
.preview-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: #04070a;
  position: relative;
}

.preview-header {
  padding: 15px 20px;
  background: rgba(10, 15, 20, 0.8);
  border-bottom: 1px solid rgba(93, 225, 255, 0.2);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.preview-title {
  font-size: 1.1rem;
  color: #5de1ff;
}

.preview-actions {
  display: flex;
  gap: 10px;
}

.preview-actions button {
  width: auto;
  padding: 8px 16px;
}

.preview-container {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  overflow: auto;
}

#previewCanvas {
  max-width: 100%;
  max-height: 100%;
  border: 1px solid rgba(93, 225, 255, 0.3);
  box-shadow: 0 0 20px rgba(93, 225, 255, 0.2);
  background: #000;
}

.help-text {
  text-align: center;
  color: rgba(151, 243, 210, 0.5);
  font-size: 0.9rem;
  padding: 20px;
}

@media (max-width: 768px) {
  .container {
    flex-direction: column;
  }

  .control-panel {
    width: 100%;
    height: 50vh;
    border-right: none;
    border-bottom: 1px solid rgba(93, 225, 255, 0.2);
  }

  .preview-panel {
    height: 50vh;
  }
}

/* License modal styles */
.license-footer {
  margin-top: 30px;
  margin-bottom: 20px;
  padding: 10px 8px;
  font-size: 0.68rem;
  color: #a9a9b2;
  opacity: 0.7;
  cursor: pointer;
  transition: opacity 0.15s ease;
  text-align: center;
}

.license-footer:hover { opacity: 1; }

.license-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  z-index: 999;
}

.license-modal {
  display: none;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: #0f0f16;
  border: 2px solid rgba(93, 225, 255, 0.35);
  border-radius: 12px;
  padding: 20px;
  max-width: 520px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0,0,0,.6);
  z-index: 1000;
  text-align: center;
}

.license-modal.show,
.license-overlay.show {
  display: block;
}

.license-modal-header {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  padding-right: 32px;
  gap: 12px;
}

.license-modal-title {
  font-size: 18px;
  color: #5de1ff;
  margin-bottom: 15px;
}

.license-modal-text {
  font-size: 12px;
  line-height: 1.6;
  color: #b0b0b0;
  text-align: left;
  white-space: pre-wrap;
}

.license-close {
  position: absolute;
  top: 0;
  right: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(255,0,0,0.15);
  border: 1px solid rgba(255,0,0,0.3);
  color: #ff5555;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.license-close:hover {
  background: rgba(255,0,0,0.3);
  border-color: #ff5555;
}