:root {
  --bg-primary: #0f111a;
  --bg-secondary: #1a1d27;
  --bg-tertiary: rgba(255, 255, 255, 0.03);
  --text-primary: #f8f9fa;
  --text-secondary: #adb5bd;
  --accent-color: #6366f1;
  --accent-hover: #4f46e5;
  --border-color: rgba(255, 255, 255, 0.1);
  --glass-bg: rgba(26, 29, 39, 0.7);
  --glass-border: rgba(255, 255, 255, 0.08);
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.2), 0 4px 6px -2px rgba(0, 0, 0, 0.1);
}

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

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  height: 100vh;
  overflow: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: #3f4354;
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #5a5f73;
}

.app-container {
  display: flex;
  height: 100%;
}

/* Sidebar Styles */
.sidebar {
  width: 380px;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-right: 1px solid var(--glass-border);
  display: flex;
  flex-direction: column;
  padding: 24px;
  gap: 20px;
  overflow-y: auto;
  box-shadow: var(--shadow-md);
  z-index: 10;
}

.sidebar-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, #a5b4fc 0%, #6366f1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 4px;
}

.sidebar-header p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Language Switch */
.lang-switch {
  display: flex;
  gap: 4px;
  background: var(--bg-primary);
  padding: 4px;
  border-radius: 6px;
  border: 1px solid var(--border-color);
}

.lang-switch button {
  background: transparent;
  color: var(--text-secondary);
  border: none;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 8px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
}

.lang-switch button.active {
  background: var(--accent-color);
  color: white;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.control-group label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
}

.drop-zone {
  position: relative;
  border: 2px dashed var(--border-color);
  border-radius: 8px;
  background-color: var(--bg-tertiary);
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

.drop-zone.drag-over {
  border-color: var(--accent-color);
  background-color: rgba(99, 102, 241, 0.1);
}

.drop-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(99, 102, 241, 0.9);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  border-radius: 6px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}

.drop-zone.drag-over .drop-overlay {
  opacity: 1;
}

#csv-drop-zone {
  height: 150px;
}

textarea#csv-input {
  width: 100%;
  height: 100%;
  background: transparent;
  border: none;
  color: var(--text-primary);
  padding: 12px;
  font-family: monospace;
  font-size: 0.8rem;
  resize: none;
  outline: none;
}

.image-drop-zone {
  min-height: 100px;
  padding: 16px;
  text-align: center;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: stretch;
}

.image-drop-zone p {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

#loaded-images-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  max-height: 150px;
  overflow-y: auto;
  background: var(--bg-secondary);
  border-radius: 6px;
  padding: 8px;
  border: 1px solid var(--border-color);
  justify-content: center;
}

#loaded-images-list:empty {
  display: none;
}

#loaded-images-list li {
  font-size: 0.75rem;
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 4px 8px;
  border-radius: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

/* Settings Panel */
.settings-panel {
  background: var(--bg-secondary);
  border-radius: 12px;
  padding: 16px;
  border: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.settings-panel h3 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.setting-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.setting-row label {
  font-size: 0.875rem;
}

.setting-row input[type="number"] {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  border-radius: 6px;
  padding: 6px 10px;
  width: 80px;
  text-align: right;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s;
}

.setting-row input[type="number"]:focus {
  border-color: var(--accent-color);
}

.setting-select {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  border-radius: 6px;
  padding: 6px 10px;
  width: 90px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s;
}

.setting-select:focus {
  border-color: var(--accent-color);
}

.setting-toggle {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 4px;
}

.toggle-label {
  font-size: 0.875rem;
}

/* Toggle Switch CSS */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}

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

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  transition: .3s;
  border-radius: 24px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 2px;
  bottom: 2px;
  background-color: var(--text-secondary);
  transition: .3s;
  border-radius: 50%;
}

input:checked+.slider {
  background-color: var(--accent-color);
  border-color: var(--accent-color);
}

input:checked+.slider:before {
  transform: translateX(20px);
  background-color: white;
}

/* Actions */
.actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: auto;
}

.btn {
  font-family: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 12px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  justify-content: center;
  align-items: center;
}

.btn-primary {
  background-color: var(--accent-color);
  color: white;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(99, 102, 241, 0.4);
}

.btn-primary:active {
  transform: translateY(1px);
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--bg-tertiary);
  border-color: var(--text-secondary);
}

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

/* Footer */
.sidebar-footer {
  padding-top: 4px;
  text-align: center;
  font-size: 0.8rem;
}

.sidebar-footer a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s ease;
}

.sidebar-footer a:hover,
.sidebar-footer a:focus-visible {
  color: var(--text-primary);
  text-decoration: underline;
}

/* Main Canvas Area */
.canvas-container {
  flex: 1;
  background-color: #12141c;
  /* slightly different from sidebar for contrast */
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 40px 40px;
  overflow: auto;
  position: relative;
  display: flex;
}

.canvas-wrapper {
  position: relative;
  padding: 40px;
  margin: auto;
}

canvas {
  background-color: #0d0f17;
  background-image:
    linear-gradient(45deg, #161925 25%, transparent 25%),
    linear-gradient(-45deg, #161925 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #161925 75%),
    linear-gradient(-45deg, transparent 75%, #161925 75%);
  background-size: 24px 24px;
  background-position: 0 0, 0 12px, 12px -12px, -12px 0px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7), 0 0 0 1px rgba(255, 255, 255, 0.05);
  border-radius: 6px;
  max-width: none;
  transition: transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}

/* Loading Overlay */
#loading-overlay {
  position: absolute;
  inset: 0;
  background: rgba(15, 17, 26, 0.8);
  backdrop-filter: blur(4px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  z-index: 20;
  border-radius: 4px;
}

#loading-overlay.hidden {
  display: none;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--border-color);
  border-top-color: var(--accent-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 100;
  pointer-events: none;
}

.toast {
  background: var(--bg-secondary);
  color: var(--text-primary);
  padding: 16px 20px;
  border-radius: 8px;
  border-left: 4px solid var(--accent-color);
  box-shadow: var(--shadow-md);
  font-size: 0.9rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 12px;
  opacity: 0;
  transform: translateX(100%);
  animation: slideIn 0.3s forwards ease-out;
  pointer-events: auto;
  max-width: 350px;
  word-break: break-word;
}

.toast.toast-error {
  border-left-color: #ef4444;
  /* red */
}

.toast.toast-warn {
  border-left-color: #f59e0b;
  /* yellow */
}

.toast.toast-info {
  border-left-color: #3b82f6;
  /* blue */
}

.toast.fadeOut {
  animation: fadeOut 0.3s forwards ease-in;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(100%);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeOut {
  from {
    opacity: 1;
    transform: scale(1);
  }

  to {
    opacity: 0;
    transform: scale(0.9);
  }
}

/* Privacy Policy Page */
.policy-page {
  min-height: 100vh;
  height: auto;
  overflow: auto;
}

.policy-container {
  width: min(760px, calc(100% - 32px));
  margin: 0 auto;
  padding: 48px 0;
  line-height: 1.7;
}

.policy-container h1 {
  font-size: 2rem;
  margin-bottom: 8px;
}

.policy-updated {
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.policy-container section {
  margin-top: 28px;
}

.policy-container h2 {
  font-size: 1.2rem;
  margin-bottom: 8px;
}

.policy-container p,
.policy-container li {
  color: var(--text-secondary);
}

.policy-container ul {
  padding-left: 20px;
}

.policy-back-link {
  display: inline-block;
  margin-top: 32px;
  color: var(--text-primary);
}