:root {
  --bg: #f6f0e6;
  --bg-2: #ede4d4;
  --ink: #2a1d11;
  --ink-2: #6b5a45;
  --ink-3: #9a8a72;
  --accent: #b4541e;
  --accent-2: #8a3f15;
  --accent-soft: rgba(180, 84, 30, 0.08);
  --card: #fffdf7;
  --border: #d8c8a8;
  --border-2: #c4b494;
  --shadow: 0 1px 0 rgba(0,0,0,0.04), 0 8px 24px rgba(80, 50, 20, 0.08);
  --shadow-lg: 0 1px 0 rgba(0,0,0,0.04), 0 12px 40px rgba(80, 50, 20, 0.12);
  --radius: 14px;
  --radius-sm: 10px;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Inter, sans-serif;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body {
  margin: 0;
  padding: 0;
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(180, 84, 30, 0.07), transparent 60%),
    radial-gradient(900px 600px at 110% 0%, rgba(80, 50, 20, 0.09), transparent 50%),
    var(--bg);
  color: var(--ink);
  min-height: 100vh;
}

/* Header */
header {
  padding: 36px 32px 4px;
  max-width: 1280px;
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(180, 84, 30, 0.25);
  flex-shrink: 0;
}

.brand-text h1 {
  margin: 0;
  font-size: 28px;
  letter-spacing: -0.025em;
  line-height: 1.1;
}

.brand-text p {
  margin: 4px 0 0;
  color: var(--ink-2);
  font-size: 14px;
}

/* Main */
main {
  max-width: 1280px;
  margin: 0 auto;
  padding: 20px 32px 48px;
}

footer {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px 40px;
  color: var(--ink-2);
  font-size: 13px;
}

footer kbd {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 5px;
  font-size: 11px;
  font-family: ui-monospace, SFMono-Regular, monospace;
}

/* Dropzone */
.dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  background: var(--card);
  padding: 72px 24px;
  text-align: center;
  transition: border-color 0.2s, background 0.2s, transform 0.2s, box-shadow 0.2s;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.dropzone::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 50%, var(--accent-soft), transparent 70%);
  opacity: 0;
  transition: opacity 0.3s;
}

.dropzone:hover, .dropzone.drag {
  border-color: var(--accent);
  background: #fff;
  box-shadow: var(--shadow-lg);
  transform: translateY(-1px);
}

.dropzone:hover::before, .dropzone.drag::before {
  opacity: 1;
}

.drop-content {
  position: relative;
  z-index: 1;
  color: var(--ink-2);
}

.upload-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: var(--bg-2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  transition: transform 0.3s, background 0.3s;
}

.dropzone:hover .upload-icon {
  transform: translateY(-3px);
  background: var(--accent-soft);
}

.drop-title {
  font-size: 18px;
  margin: 0 0 4px;
  color: var(--ink);
}

.drop-sub {
  margin: 0 0 8px;
  font-size: 14px;
}

.dropzone button {
  background: none;
  border: none;
  color: var(--accent);
  font: inherit;
  cursor: pointer;
  text-decoration: underline;
  padding: 0;
  font-weight: 500;
}

.hint {
  font-size: 12px;
  margin: 0;
  color: var(--ink-3);
}

/* Workspace */
.workspace {
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.info-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 12px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  margin-bottom: 16px;
  font-size: 13px;
  color: var(--ink-2);
  box-shadow: var(--shadow);
}

.info-bar strong {
  color: var(--ink);
  font-weight: 600;
}

.info-sep { color: var(--border-2); }

.workspace-inner {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 20px;
  align-items: start;
}

@media (max-width: 980px) {
  .workspace-inner { grid-template-columns: 1fr; }
}

/* Previews */
.previews {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

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

@media (max-width: 700px) {
  .previews { grid-template-columns: 1fr; }
}

.preview-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px;
  box-shadow: var(--shadow);
  transition: box-shadow 0.2s, border-color 0.2s;
}

.preview-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--border-2);
}

.preview-label {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 10px;
  font-weight: 600;
}

.preview-wrap {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
  cursor: crosshair;
}

.preview-wrap canvas {
  width: 100%;
  height: auto;
  display: block;
  image-rendering: pixelated;
}

.zoom-hint {
  position: absolute;
  bottom: 6px;
  right: 6px;
  font-size: 10px;
  color: rgba(0,0,0,0.35);
  background: rgba(255,255,255,0.8);
  padding: 2px 6px;
  border-radius: 4px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s;
}

.preview-wrap:hover .zoom-hint {
  opacity: 1;
}

/* Zoom lens */
.zoom-lens {
  position: absolute;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  box-shadow: 0 4px 16px rgba(0,0,0,0.2), inset 0 0 0 1px rgba(255,255,255,0.3);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s;
  overflow: hidden;
  background-repeat: no-repeat;
  z-index: 10;
}

.preview-wrap:hover .zoom-lens {
  opacity: 1;
}

/* Controls */
.controls {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  box-shadow: var(--shadow);
  position: sticky;
  top: 16px;
  max-height: calc(100vh - 32px);
  overflow-y: auto;
}

.controls::-webkit-scrollbar { width: 6px; }
.controls::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

.control-section {
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--bg-2);
}

.control-section:last-of-type {
  border-bottom: none;
  margin-bottom: 12px;
}

.section-title {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
  font-weight: 700;
  margin-bottom: 12px;
}

.control-group {
  margin-bottom: 14px;
}

.control-group:last-child {
  margin-bottom: 0;
}

.control-group label {
  display: block;
  font-size: 13px;
  color: var(--ink-2);
  margin-bottom: 6px;
}

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

.row output {
  font-variant-numeric: tabular-nums;
  color: var(--ink);
  font-size: 12px;
  font-weight: 600;
  background: var(--bg-2);
  padding: 1px 8px;
  border-radius: 4px;
}

.tip {
  color: var(--ink-3);
  cursor: help;
  border-bottom: 1px dotted var(--border-2);
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
  height: 4px;
  border-radius: 2px;
}

input[type="number"], select {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  font: inherit;
  font-size: 13px;
  transition: border-color 0.15s, box-shadow 0.15s;
}

input[type="number"]:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.check {
  display: flex !important;
  align-items: center;
  gap: 8px;
  font-size: 13px !important;
  color: var(--ink) !important;
  margin-bottom: 0 !important;
  cursor: pointer;
}

.check input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
  cursor: pointer;
}

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

/* Presets */
.preset-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

.preset-btn {
  padding: 8px 6px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  color: var(--ink-2);
  font: inherit;
  font-size: 12px;
  cursor: pointer;
  transition: all 0.15s;
  text-align: center;
}

.preset-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

.preset-btn.active {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
  box-shadow: 0 2px 8px rgba(180, 84, 30, 0.25);
}

/* Actions */
.actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 4px;
  border-top: 1px solid var(--bg-2);
  padding-top: 14px;
}

.action-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

button.primary, button.secondary, button.ghost {
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid transparent;
  font: inherit;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s, transform 0.1s, box-shadow 0.15s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
}

button.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  box-shadow: 0 4px 12px rgba(180, 84, 30, 0.25);
}

button.primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(180, 84, 30, 0.35);
}

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

button.secondary {
  background: #fff;
  border-color: var(--border);
  color: var(--ink);
}

button.secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

button.ghost {
  background: transparent;
  border-color: transparent;
  color: var(--ink-2);
}

button.ghost:hover {
  color: var(--accent);
  background: var(--accent-soft);
}

/* Processing overlay */
.processing {
  position: fixed;
  inset: 0;
  background: rgba(255, 253, 247, 0.85);
  backdrop-filter: blur(4px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  z-index: 1000;
  animation: fadeIn 0.2s ease;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.processing p {
  color: var(--ink-2);
  font-size: 14px;
  margin: 0;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--ink);
  color: #fff;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
  z-index: 1001;
  animation: toastIn 0.3s ease;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateX(-50%) translateY(12px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

.toast.hiding {
  animation: toastOut 0.3s ease forwards;
}

@keyframes toastOut {
  to { opacity: 0; transform: translateX(-50%) translateY(12px); }
}