/* ── ASCII Art Generator ─────────────────────────────── */

:root {
  --bg: #0d1117;
  --surface: #161b22;
  --surface2: #1c2333;
  --border: #30363d;
  --text: #e6edf3;
  --text-dim: #8b949e;
  --accent: #00ddff;
  --accent2: #bf5af2;
  --accent3: #30d158;
  --danger: #ff453a;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* ── Header (minimal) ─────────────────────────────── */

header {
  display: none;
}

/* ── Controls Bar (horizontal) ─────────────────────────────── */

.controls {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
  flex-wrap: wrap;
}

/* ── Mode Tabs ─────────────────────────────── */

.mode-tabs {
  display: flex;
  gap: 3px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 3px;
}

.mode-tab {
  padding: 8px 16px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--text-dim);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
  letter-spacing: 0.3px;
  user-select: none;
  -webkit-user-select: none;
  position: relative;
  z-index: 1;
}

.mode-tab:hover {
  color: var(--text);
  background: rgba(255,255,255,0.06);
}

.mode-tab.active {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  box-shadow: 0 2px 8px rgba(0, 221, 255, 0.3);
}

.mode-controls { display: flex; align-items: center; gap: 8px; }

/* ── Upload Zone ─────────────────────────────── */

.upload-zone {
  border: 2px dashed var(--border);
  border-radius: 8px;
  padding: 8px 16px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  background: var(--surface2);
  min-width: 140px;
}

.upload-zone:hover, .upload-zone.dragover {
  border-color: var(--accent);
  background: rgba(0, 221, 255, 0.05);
}

.upload-icon { font-size: 20px; margin-right: 4px; display: inline; }
.upload-zone p { font-size: 12px; color: var(--text-dim); display: inline; }
.upload-hint { display: none; }

.browse-link {
  color: var(--accent);
  cursor: pointer;
  text-decoration: underline;
}

.file-info {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  background: var(--surface2);
  border-radius: 6px;
  border: 1px solid var(--border);
}

.thumb {
  width: 32px;
  height: 32px;
  object-fit: cover;
  border-radius: 4px;
}

.file-info div {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text);
}

.file-info span {
  max-width: 100px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ── Settings (inline) ─────────────────────────────── */

.settings-grid {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.setting {
  display: flex;
  align-items: center;
  gap: 4px;
}

.setting label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.3px;
  white-space: nowrap;
}

.setting select {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 4px;
  padding: 4px 6px;
  font-size: 12px;
  font-family: 'JetBrains Mono', monospace;
}

.setting select:focus { outline: 1px solid var(--accent); border-color: var(--accent); }

.setting input[type="range"] {
  -webkit-appearance: none;
  width: 100px;
  height: 4px;
  border-radius: 2px;
  background: var(--border);
  cursor: pointer;
}

.setting input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
}

.checkbox-group {
  gap: 10px !important;
}

.checkbox-group label {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  text-transform: none;
  cursor: pointer;
  white-space: nowrap;
}

.checkbox-group input[type="checkbox"] {
  accent-color: var(--accent);
  width: 14px;
  height: 14px;
}

/* ── Buttons ─────────────────────────────── */

.btn-generate {
  padding: 8px 24px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  transition: all 0.2s;
  white-space: nowrap;
  box-shadow: 0 2px 8px rgba(0, 221, 255, 0.25);
  letter-spacing: 0.3px;
}

.btn-generate:hover:not(:disabled) {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 221, 255, 0.4);
}
.btn-generate:disabled { opacity: 0.3; cursor: not-allowed; box-shadow: none; }

.btn-small {
  padding: 3px 8px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--surface);
  color: var(--text-dim);
  font-size: 11px;
  cursor: pointer;
  transition: all 0.15s;
}

.btn-small:hover { border-color: var(--accent); color: var(--accent); }

/* ── Preview (fills remaining space) ─────────────────────────────── */

.preview-wrapper {
  flex: 1 1 0;
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

.preview-container {
  flex: 1 1 0;
  display: flex;
  flex-direction: column;
  min-height: 0;
  position: relative;
  overflow: hidden;
}

.preview-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 12px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.preview-title {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.preview-actions { display: flex; gap: 6px; align-items: center; }

.zoom-controls {
  display: flex;
  align-items: center;
  gap: 3px;
  margin-right: 6px;
  padding-right: 6px;
  border-right: 1px solid var(--border);
}

.zoom-controls button {
  width: 24px;
  height: 24px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--surface);
  color: var(--text-dim);
  font-size: 13px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
  padding: 0;
}

.zoom-controls button:hover { border-color: var(--accent); color: var(--accent); }

.zoom-level {
  font-size: 10px;
  color: var(--text-dim);
  min-width: 32px;
  text-align: center;
  font-family: 'JetBrains Mono', monospace;
}

.btn-fullscreen {
  padding: 3px 6px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--surface);
  color: var(--text-dim);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s;
}

.btn-fullscreen:hover { border-color: var(--accent); color: var(--accent); }

.gif-badge {
  font-size: 10px;
  font-weight: 700;
  color: var(--accent3);
  background: rgba(48, 209, 88, 0.1);
  padding: 2px 6px;
  border-radius: 4px;
}

.preview-area {
  flex: 1 1 0;
  min-height: 0;
  background: var(--surface2);
  padding: 4px;
  overflow: auto;
  font-family: 'JetBrains Mono', monospace;
  font-size: 5px;
  line-height: 1.0;
  letter-spacing: 0px;
  white-space: pre;
  position: relative;
}

.placeholder {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: var(--text-dim);
  font-family: -apple-system, sans-serif;
  font-size: 14px;
}

/* ── Compare Box ─────────────────────────────── */

.compare-box {
  position: absolute;
  bottom: 12px;
  right: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
  z-index: 10;
  transition: all 0.2s;
  max-width: 240px;
}

.compare-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 4px 8px;
  background: var(--surface2);
  border-bottom: 1px solid var(--border);
  font-size: 10px;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  cursor: pointer;
}

.compare-header button {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 9px;
  cursor: pointer;
  padding: 2px;
}

.compare-img {
  display: block;
  width: 100%;
  max-height: 180px;
  object-fit: contain;
  background: #000;
}

.compare-box.minimized { max-width: 80px; }
.compare-box.minimized .compare-img { display: none; }
.compare-box.minimized .compare-header { border-bottom: none; }

/* ── Spinner ─────────────────────────────── */

.spinner {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: var(--accent);
  font-size: 13px;
  z-index: 5;
}

.spin-anim {
  width: 28px;
  height: 28px;
  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); } }

/* ── Footer (hidden to maximize space) ─────────────────────────────── */

footer { display: none; }

/* ── Fullscreen mode ─────────────────────────────── */

.preview-container.fullscreen {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1000;
}

.preview-container.fullscreen .preview-area { border-radius: 0; }
.preview-container.fullscreen .preview-bar { border-radius: 0; }

/* ── Responsive ─────────────────────────────── */

@media (max-width: 768px) {
  .controls { flex-wrap: wrap; gap: 8px; padding: 8px 12px; }
  .setting input[type="range"] { width: 70px; }
}