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

:root {
  --bg: #0a0a0a;
  --surface: #141414;
  --border: #2a2a2a;
  --text: #e8e8e8;
  --muted: #888;
  --accent: #fff;
  --radius: 6px;
}

body {
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100dvh;
  line-height: 1.5;
}

main {
  max-width: 640px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

h1 {
  font-size: 1.1rem;
  font-weight: 500;
  text-align: center;
  margin-bottom: 2rem;
  color: var(--muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.hidden { display: none !important; }

/* Drop zone */

.dropzone {
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 4rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s;
}

.dropzone:hover,
.dropzone.dragover {
  border-color: var(--muted);
}

.dropzone p {
  color: var(--muted);
  font-size: 0.9rem;
}

/* Editor */

.editor {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.preview-tabs {
  display: flex;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.preview-tab {
  flex: 1;
  padding: 0.45rem;
  background: none;
  border: none;
  color: var(--muted);
  font-size: 0.8rem;
  cursor: pointer;
}

.preview-tab:not(:last-child) {
  border-right: 1px solid var(--border);
}

.preview-tab.active {
  background: var(--surface);
  color: var(--accent);
}

.preview-wrap {
  position: relative;
  background: var(--surface);
  border-radius: var(--radius);
  overflow: hidden;
  line-height: 0;
}

#preview {
  width: 100%;
  display: block;
}

/* Crop overlay */

.crop-overlay {
  position: absolute;
  inset: 0;
  cursor: crosshair;
}

.crop-box {
  position: absolute;
  border: 1px solid var(--accent);
  box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.55);
  cursor: move;
}

/* Mode tabs */

.mode-tabs {
  display: flex;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.tab {
  flex: 1;
  padding: 0.6rem;
  background: none;
  border: none;
  color: var(--muted);
  font-size: 0.85rem;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.tab:not(:last-child) {
  border-right: 1px solid var(--border);
}

.tab:hover { color: var(--text); }

.tab.active {
  background: var(--surface);
  color: var(--accent);
}

/* Panels */

.panel {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.panel label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.panel label.checkbox {
  cursor: pointer;
}

.panel input[type="range"] {
  flex: 1;
  accent-color: var(--accent);
}

.panel input[type="number"] {
  width: 4.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  padding: 0.3rem 0.5rem;
  font-size: 0.85rem;
}

.panel input[type="checkbox"] {
  accent-color: var(--accent);
}

.crop-inputs {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.hint {
  font-size: 0.75rem;
  color: var(--muted);
}

/* Buttons */

.export-btn {
  width: 100%;
  padding: 0.75rem;
  background: var(--accent);
  color: var(--bg);
  border: none;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: opacity 0.15s;
}

.export-btn:hover { opacity: 0.85; }
.export-btn:disabled { opacity: 0.4; cursor: not-allowed; }

.download-btn {
  width: 100%;
  padding: 0.75rem;
  background: none;
  color: var(--accent);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: border-color 0.15s, opacity 0.15s;
}

.download-btn:hover:not(:disabled) { border-color: var(--muted); }
.download-btn:disabled { opacity: 0.4; cursor: not-allowed; }

.reset-btn {
  width: 100%;
  padding: 0.5rem;
  background: none;
  border: none;
  color: var(--muted);
  font-size: 0.8rem;
  cursor: pointer;
}

.reset-btn:hover { color: var(--text); }

/* Progress */

.progress {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.progress-bar {
  height: 3px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
  position: relative;
}

.progress-bar::after {
  content: '';
  position: absolute;
  inset: 0;
  width: var(--pct, 0%);
  background: var(--accent);
  transition: width 0.2s;
}

#progress-text {
  font-size: 0.75rem;
  color: var(--muted);
  text-align: center;
}