/* ============================================
   Local Font Tester — Styles
   Theme: Dark mode with Modern Purple/Teal palette
   ============================================ */

:root {
  --primary: #6C5CE7;
  --primary-dim: rgba(108, 92, 231, 0.15);
  --secondary: #A29BFE;
  --accent: #00CEC9;
  --accent-dim: rgba(0, 206, 201, 0.2);
  --bg: #0B0E11;
  --bg-card: rgba(16, 20, 28, 0.65);
  --bg-surface: #141820;
  --border: rgba(108, 92, 231, 0.12);
  --border-hover: rgba(108, 92, 231, 0.3);
  --text: #E8E6F0;
  --text-dim: #7E7B9A;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 250ms ease;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --shadow-glow: 0 0 40px rgba(108, 92, 231, 0.06);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  background-image:
    radial-gradient(ellipse at 20% 0%, rgba(108, 92, 231, 0.04) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 100%, rgba(0, 206, 201, 0.04) 0%, transparent 60%);
}

.glass-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-glow);
}

/* Header */
.header {
  padding: 2rem 1.5rem;
  text-align: center;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(108, 92, 231, 0.04) 0%, transparent 100%);
}
.header-inner { max-width: 800px; margin: 0 auto; }
.logo { display: flex; align-items: center; justify-content: center; gap: 0.75rem; }
.logo-icon { font-size: 2rem; }
.logo h1 {
  font-size: 1.75rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.tagline { color: var(--text-dim); font-size: 0.95rem; margin-top: 0.25rem; }

/* Main */
.main {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* Section Titles */
.section-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 1rem;
}
.subsection-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--secondary);
  margin: 1.25rem 0 0.75rem;
}
.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.panel-header .section-title { margin-bottom: 0; }

/* Drop Zone */
.upload-section { width: 100%; }
.drop-zone {
  position: relative;
  border: 2px dashed var(--border-hover);
  border-radius: var(--radius);
  padding: 3rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
  background: var(--bg-card);
}
.drop-zone:hover, .drop-zone:focus-visible {
  border-color: var(--primary);
  background: var(--primary-dim);
  transform: translateY(-2px);
}
.drop-zone.drag-over { border-color: var(--accent); background: var(--accent-dim); transform: scale(1.01); }
.drop-zone:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.drop-zone-content { pointer-events: none; }
.drop-icon { width: 48px; height: 48px; color: var(--primary); margin-bottom: 1rem; }
.drop-text { font-size: 1.1rem; color: var(--text); margin-bottom: 0.5rem; }
.browse-link { color: var(--primary); text-decoration: underline; font-weight: 600; }
.drop-hint { font-size: 0.85rem; color: var(--text-dim); }
.file-input { position: absolute; inset: 0; opacity: 0; cursor: pointer; }

/* Font Tabs */
.fonts-tabs {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.font-tab {
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text-dim);
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}
.font-tab:hover { border-color: var(--primary); color: var(--text); }
.font-tab.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* Controls */
.controls-section { padding: 1.5rem; }
.controls-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
}
.control-group.full-width { grid-column: 1 / -1; }
.control-label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 0.35rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 500;
}
.control-input {
  width: 100%;
  padding: 0.6rem 0.75rem;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font);
  font-size: 0.9rem;
  transition: border-color var(--transition);
}
.control-input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-dim); }
.textarea { resize: vertical; min-height: 60px; }
.range-input {
  width: 100%;
  accent-color: var(--primary);
  cursor: pointer;
}
.color-input {
  width: 100%;
  height: 36px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  cursor: pointer;
}

/* OpenType Feature Toggles */
.feature-toggles { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.feature-btn {
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: transparent;
  color: var(--text-dim);
  font-size: 0.78rem;
  font-family: var(--font);
  cursor: pointer;
  transition: all var(--transition);
}
.feature-btn:hover { border-color: var(--primary); color: var(--text); }
.feature-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }

/* Variable Axes */
.axes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

/* Preview */
.preview-section { padding: 1.5rem; }
.preview-area {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 2rem;
  min-height: 100px;
  word-break: break-word;
  overflow-wrap: break-word;
}

/* Character Grid */
.chars-section { padding: 1.5rem; }
.chars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(44px, 1fr));
  gap: 4px;
}
.char-cell {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 1.2rem;
  cursor: pointer;
  transition: all var(--transition);
}
.char-cell:hover { border-color: var(--primary); background: var(--primary-dim); transform: scale(1.1); }
.char-cell.selected { border-color: var(--accent); background: var(--accent-dim); }

/* Metrics */
.metrics-section { padding: 1.5rem; }
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 0.75rem;
}
.metric-item {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
}
.metric-label { font-size: 0.7rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.5px; }
.metric-value { font-size: 1rem; font-weight: 600; color: var(--accent); margin-top: 0.25rem; }

/* Glyph Inspector */
.glyph-section { padding: 1.5rem; }
.glyph-display {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 2rem;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  min-height: 120px;
}
.glyph-char { font-size: 5rem; line-height: 1; }
.glyph-info { font-size: 0.82rem; color: var(--text-dim); text-align: center; }
.placeholder-text { color: var(--text-dim); font-size: 0.9rem; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.65rem 1.25rem;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn-accent { background: var(--accent); color: #0B0E11; }
.btn-accent:hover { transform: translateY(-1px); box-shadow: 0 4px 16px rgba(0, 206, 201, 0.35); }
.btn-sm { padding: 0.45rem 0.9rem; font-size: 0.82rem; }

/* Toast */
.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--primary);
  color: #fff;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  box-shadow: 0 8px 32px rgba(108, 92, 231, 0.4);
  z-index: 1000;
  transition: transform 300ms ease;
}
.toast.show { transform: translateX(-50%) translateY(0); }

/* Footer */
.footer { text-align: center; padding: 2rem 1.5rem; color: var(--text-dim); font-size: 0.8rem; border-top: 1px solid var(--border); }

@media (max-width: 600px) {
  .header h1 { font-size: 1.35rem; }
  .drop-zone { padding: 2rem 1rem; }
  .controls-grid { grid-template-columns: 1fr; }
  .main { padding: 1.25rem 1rem 3rem; gap: 1.25rem; }
  .chars-grid { grid-template-columns: repeat(auto-fill, minmax(36px, 1fr)); }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-in { animation: fadeIn 250ms ease forwards; }