/* ============================================================
   NPM Download Trend Grapher — Styles
   Theme: Dark mode with vibrant candy accents
   ============================================================ */

:root {
  --bg: #0B0E14;
  --bg-card: #141820;
  --bg-glass: rgba(20, 24, 32, 0.8);
  --bg-input: #0E1118;
  --border: rgba(244, 114, 182, 0.12);
  --border-hover: rgba(244, 114, 182, 0.25);
  --text: #E2E8F0;
  --text-muted: #94A3B8;
  --text-dim: #64748B;
  --pink: #F472B6;
  --pink-hover: #F9A8D4;
  --pink-bg: rgba(244, 114, 182, 0.08);
  --radius: 12px;
  --radius-sm: 8px;
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --transition: 200ms ease;
}

/* Chart colors */
.color-0 { --c: #F472B6; }
.color-1 { --c: #38BDF8; }
.color-2 { --c: #A78BFA; }
.color-3 { --c: #34D399; }
.color-4 { --c: #FBBF24; }
.color-5 { --c: #FB923C; }

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font); background: var(--bg); color: var(--text); min-height: 100vh; line-height: 1.6; }
.app { max-width: 920px; margin: 0 auto; padding: 0 20px 60px; }

.header { padding: 24px 0 16px; border-bottom: 1px solid var(--border); margin-bottom: 22px; }
.logo-row { display: flex; align-items: center; gap: 12px; }
.logo-badge { width: 42px; height: 42px; display: flex; align-items: center; justify-content: center; background: var(--pink-bg); border-radius: var(--radius); border: 1px solid var(--border); }
h1 { font-size: 1.2rem; font-weight: 700; letter-spacing: -0.02em; }
.tagline { font-size: 0.78rem; color: var(--text-muted); }

.btn { display: inline-flex; align-items: center; gap: 6px; padding: 10px 20px; border: none; border-radius: var(--radius-sm); font-family: var(--font); font-size: 0.875rem; font-weight: 600; cursor: pointer; transition: all var(--transition); white-space: nowrap; }
.btn-primary { background: var(--pink); color: #1A1A1A; }
.btn-primary:hover { background: var(--pink-hover); box-shadow: 0 0 14px rgba(244,114,182,0.2); }
.btn-sm { padding: 6px 14px; font-size: 0.78rem; }
.btn-outline { background: var(--bg-card); color: var(--text-muted); border: 1px solid var(--border); }
.btn-outline:hover { border-color: var(--pink); color: var(--pink); }

.search-section { margin-bottom: 22px; }
.search-row { display: flex; gap: 10px; margin-bottom: 10px; }
#pkgInput { flex: 1; padding: 11px 16px; background: var(--bg-input); border: 1px solid var(--border); border-radius: var(--radius); color: var(--text); font-family: var(--font); font-size: 0.9rem; outline: none; transition: border-color var(--transition); }
#pkgInput:focus { border-color: var(--pink); }
#pkgInput::placeholder { color: var(--text-dim); }

.control-row { display: flex; justify-content: space-between; align-items: center; }
.range-group { display: flex; gap: 4px; }
.range-btn { padding: 5px 14px; background: var(--bg-card); border: 1px solid var(--border); border-radius: 14px; font-family: var(--font); font-size: 0.72rem; font-weight: 600; color: var(--text-dim); cursor: pointer; transition: all var(--transition); }
.range-btn:hover { border-color: var(--border-hover); color: var(--text); }
.range-btn.active { background: var(--pink-bg); border-color: var(--pink); color: var(--pink); }

.scale-toggle { display: flex; align-items: center; gap: 6px; cursor: pointer; }
.scale-toggle input { accent-color: var(--pink); }
.scale-label { font-size: 0.78rem; color: var(--text-muted); }

.chart-section[hidden] { display: none; }
.chart-section { animation: fadeUp 300ms ease; }
@keyframes fadeUp { from { opacity:0; transform:translateY(10px); } to { opacity:1; transform:translateY(0); } }

.chart-wrap { background: var(--bg-glass); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; margin-bottom: 12px; overflow: hidden; }
canvas { width: 100%; height: auto; display: block; }

.legend { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 12px; }
.legend-item { display: flex; align-items: center; gap: 6px; font-size: 0.78rem; }
.legend-dot { width: 10px; height: 10px; border-radius: 50%; }

.export-row { display: flex; gap: 10px; justify-content: flex-end; }

.empty-state { text-align: center; padding: 60px 20px; }
.empty-state[hidden] { display: none; }
.empty-state h2 { font-size: 1.1rem; margin-top: 12px; margin-bottom: 6px; }
.empty-state p { color: var(--text-muted); font-size: 0.85rem; max-width: 380px; margin: 0 auto; }

@media (max-width: 640px) { .search-row { flex-direction: column; } .control-row { flex-direction: column; gap: 8px; } h1 { font-size: 1rem; } }