/* Font Subsetting Tool — styles.css — Ocean Blue */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --primary: #0984E3;
  --secondary: #74B9FF;
  --accent: #E17055;
  --bg: #0D1B2A;
  --bg-card: rgba(13, 27, 42, 0.92);
  --surface: rgba(20, 40, 65, 0.5);
  --border: rgba(9, 132, 227, 0.1);
  --text: #D0D8E4;
  --text-dim: #6D8BA4;
  --text-muted: #3A5A78;
  --green: #00B894;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.25s ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Inter', system-ui, sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; }

.header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 20px; background: var(--bg-card); backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100;
}
.header-left { display: flex; align-items: center; gap: 10px; }
.logo { width: 34px; height: 34px; background: linear-gradient(135deg, var(--primary), var(--secondary)); border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; font-size: 16px; }
.header h1 { font-size: 15px; font-weight: 600; background: linear-gradient(135deg, var(--primary), var(--secondary)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }

.btn {
  padding: 7px 14px; border-radius: var(--radius-sm); border: 1px solid var(--border);
  background: var(--surface); color: var(--text); font-family: 'Inter', sans-serif;
  font-size: 12px; font-weight: 500; cursor: pointer; transition: var(--transition);
}
.btn:hover { border-color: var(--primary); }
.btn-sm { padding: 5px 10px; font-size: 11px; }

.app { max-width: 800px; margin: 0 auto; padding: 16px; }

.card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; margin-bottom: 12px; }
.card h3 { font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.8px; color: var(--text-dim); margin-bottom: 10px; }

.upload-zone {
  border: 2px dashed var(--border); text-align: center; cursor: pointer;
  transition: var(--transition); min-height: 100px; display: flex; align-items: center; justify-content: center;
}
.upload-zone:hover, .upload-zone.dragover { border-color: var(--primary); background: rgba(9, 132, 227, 0.05); }
.upload-icon { font-size: 32px; margin-bottom: 8px; }
.upload-content p { font-size: 13px; color: var(--text-dim); }
.upload-label { color: var(--primary); cursor: pointer; text-decoration: underline; }

.info-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.info-item { text-align: center; }
.info-label { display: block; font-size: 9px; text-transform: uppercase; color: var(--text-muted); letter-spacing: 0.5px; }
.info-value { display: block; font-size: 13px; font-weight: 600; margin-top: 4px; font-family: 'JetBrains Mono', monospace; color: var(--secondary); }

.range-list { display: flex; flex-wrap: wrap; gap: 4px; }
.range-chip {
  padding: 5px 12px; border-radius: 16px; font-size: 11px; cursor: pointer;
  background: var(--surface); border: 1px solid var(--border); transition: var(--transition);
}
.range-chip:hover { border-color: var(--primary); }
.range-chip.active { background: rgba(9, 132, 227, 0.15); border-color: var(--primary); color: var(--primary); font-weight: 500; }

.preview-count { float: right; font-weight: 400; font-family: 'JetBrains Mono', monospace; }
.char-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(42px, 1fr)); gap: 3px; max-height: 300px; overflow-y: auto; }
.char-cell {
  aspect-ratio: 1; display: flex; align-items: center; justify-content: center;
  background: var(--surface); border: 1px solid var(--border); border-radius: 4px;
  font-size: 18px; cursor: pointer; transition: var(--transition);
}
.char-cell:hover { border-color: var(--primary); transform: scale(1.1); z-index: 2; }

.size-bars { display: flex; flex-direction: column; gap: 8px; }
.size-row { display: flex; align-items: center; gap: 8px; }
.size-label { font-size: 11px; color: var(--text-dim); min-width: 60px; }
.size-bar { height: 20px; border-radius: 4px; transition: width 0.5s ease; }
.size-original { background: var(--accent); }
.size-subset { background: var(--green); }
.size-val { font-size: 11px; font-family: 'JetBrains Mono', monospace; color: var(--text-dim); }

.css-output {
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 12px; font-family: 'JetBrains Mono', monospace; font-size: 11px;
  line-height: 1.6; overflow-x: auto; white-space: pre-wrap; color: var(--secondary);
}

.toast {
  position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 10px 20px; font-size: 13px; opacity: 0; transition: all 0.3s; z-index: 300; pointer-events: none;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-thumb { background: var(--surface); border-radius: 3px; }

@media (max-width: 600px) { .info-grid { grid-template-columns: repeat(2, 1fr); } }