:root {
  --ph-blue-700: #1d4ed8;
  --ph-blue-600: #2563eb;
  --ph-blue-100: #dbeafe;
  --ph-blue-50: #eff6ff;
  --ph-slate-50: #f8fafc;
  --ph-slate-100: #f1f5f9;
  --ph-slate-200: #e2e8f0;
  --ph-slate-600: #475569;
  --ph-slate-900: #0f172a;
  --ph-green: #16a34a;
  --ph-red: #dc2626;
  --bs-primary: var(--ph-blue-600);
  --bs-body-font-family: 'Inter', -apple-system, sans-serif;
}

body { color: var(--ph-slate-900); background: #fff; }
h1, h2, h3, h4, .ph-logo { font-family: 'Space Grotesk', 'Inter', sans-serif; letter-spacing: -0.02em; }

.ph-navbar { position: sticky; top: 0; z-index: 50; background: #fff; border-bottom: 1px solid var(--ph-slate-200); }
.ph-navbar nav a { color: var(--ph-slate-600); text-decoration: none; font-weight: 600; font-size: 14.5px; }
.ph-logo { font-weight: 700; font-size: 20px; color: var(--ph-slate-900); }

.btn-primary { background: linear-gradient(135deg, var(--ph-blue-600), var(--ph-blue-700)); border: none; border-radius: 999px; font-weight: 600; box-shadow: 0 6px 20px rgba(37,99,235,.35); }
.btn-primary:hover { transform: translateY(-1px); }
.btn-outline-primary { border-radius: 999px; font-weight: 600; }

.ph-card { background: var(--ph-slate-50); border: 1px solid var(--ph-slate-200); border-radius: 18px; padding: 26px; }
.ph-badge { display: inline-flex; align-items: center; gap: 6px; padding: 5px 12px; border-radius: 999px; font-size: 12.5px; font-weight: 600; background: var(--ph-blue-50); color: var(--ph-blue-700); border: 1px solid var(--ph-blue-100); }

.ph-mono { font-family: 'IBM Plex Mono', 'Courier New', monospace; }

table.ph-table { width: 100%; border-collapse: collapse; font-size: 13px; }
table.ph-table th { background: var(--ph-blue-600); color: #fff; text-align: left; padding: 10px 12px; }
table.ph-table td { padding: 9px 12px; border-bottom: 1px solid var(--ph-slate-200); }
table.ph-table tr:nth-child(even) td { background: var(--ph-slate-50); }

.ph-hero { padding: 72px 0 40px; text-align: center; }
.ph-hero h1 { font-size: clamp(34px, 5vw, 56px); line-height: 1.08; max-width: 820px; margin: 0 auto; }

.ph-dropzone { border: 2px dashed var(--ph-slate-200); border-radius: 18px; padding: 60px; text-align: center; cursor: pointer; background: var(--ph-slate-50); transition: .15s; }
.ph-dropzone.dragover { border-color: var(--ph-blue-600); background: var(--ph-blue-50); }

.ph-chart-locked { position: relative; }
.ph-chart-locked canvas { filter: blur(5px); }
.ph-watermark-overlay {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  background: repeating-linear-gradient(-20deg, rgba(37,99,235,.08) 0 2px, transparent 2px 140px);
  pointer-events: none;
}
.ph-watermark-overlay span {
  color: rgba(37,99,235,.55); font-weight: 700; font-size: 22px; transform: rotate(-18deg);
  font-family: 'Space Grotesk', sans-serif;
}

.ph-footer { border-top: 1px solid var(--ph-slate-200); margin-top: 80px; background: var(--ph-slate-50); }
.ph-footer a { display: block; color: var(--ph-slate-600); text-decoration: none; font-size: 14px; margin-bottom: 10px; }
.ph-footer-heading { font-weight: 700; font-size: 13px; margin-bottom: 14px; color: var(--ph-slate-600); text-transform: uppercase; letter-spacing: .06em; }
.ph-footer-bottom { border-top: 1px solid var(--ph-slate-200); }

.ph-field-btn { padding: 8px 14px; border-radius: 8px; font-size: 13px; border: 1px solid var(--ph-slate-200); background: #fff; }
.ph-field-btn.active { background: var(--ph-blue-600); color: #fff; border-color: var(--ph-blue-600); }

.ph-suggestion-card { display: block; text-align: left; width: 100%; height: 100%; background: #fff; border: 1px solid var(--ph-slate-200); border-radius: 14px; padding: 18px; cursor: pointer; transition: .15s; }
.ph-suggestion-card:hover { border-color: var(--ph-blue-600); box-shadow: 0 6px 18px rgba(37,99,235,.15); transform: translateY(-2px); }
.ph-suggestion-icon { font-size: 26px; margin-bottom: 8px; }
.ph-suggestion-title { font-weight: 700; font-size: 15px; margin-bottom: 4px; }
.ph-suggestion-desc { font-size: 13px; color: var(--ph-slate-600); }