:root{--fpt-r:20px;--fpt-r-sm:14px;--fpt-safe:max(12px,env(safe-area-inset-bottom));--fpt-tab-h:48px;--fpt-stage-minh:min(42vh,320px);--surface:#ffffff;--surface-muted:#f1f5f9;--border:#e2e8f0;--text-main:#0f172a;--text-muted:#64748b;--primary:#0d9488;--primary-dark:#0f766e;--accent:#2dd4bf;--shadow-soft:0 20px 50px rgba(15,23,42,.09);--gradient:linear-gradient(135deg,#0d9488 0%,#14b8a6 50%,#5eead4 100%);}
.fpt-hero-pills{display:flex;flex-wrap:wrap;gap:.45rem;margin:.75rem 0 0;padding:0;list-style:none;}
.fpt-hero-pills li{margin:0;}
.fpt-pill{display:inline-flex;align-items:center;padding:.28rem .65rem;border-radius:999px;font-size:.7rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase;background:var(--surface-muted);color:var(--text-main);border:1px solid var(--border);}
.fpt-workspace{margin-bottom:2.5rem;}
.fpt-stage-wrap{position:relative;margin-bottom:1rem;}
.fpt-stage{border-radius:var(--fpt-r);border:1px solid var(--border);background:linear-gradient(160deg,#0f172a 0%,#1e293b 55%,#334155 100%);box-shadow:var(--shadow-soft);min-height:var(--fpt-stage-minh);padding:clamp(1rem,4vw,1.75rem);display:flex;flex-direction:column;gap:1rem;}
.fpt-stage-toolbar{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.65rem;}
.fpt-mode-switch{display:inline-flex;padding:3px;border-radius:999px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);}
.fpt-mode-btn{appearance:none;border:0;background:transparent;color:rgba(248,250,252,.65);font-size:.72rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase;padding:.55rem 1rem;border-radius:999px;cursor:pointer;transition:color .2s,background .2s;-webkit-tap-highlight-color:transparent;}
.fpt-mode-btn[aria-pressed="true"]{background:rgba(255,255,255,.14);color:#f8fafc;}
.fpt-stage-meta{font-size:.65rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:rgba(248,250,252,.45);}
.fpt-specimen{flex:1;border-radius:var(--fpt-r-sm);background:rgba(15,23,42,.35);border:1px solid rgba(255,255,255,.08);padding:clamp(.85rem,3vw,1.25rem);min-height:140px;display:flex;align-items:center;justify-content:center;}
.fpt-specimen-inner{width:100%;color:#f8fafc;word-wrap:break-word;white-space:pre-wrap;}
.fpt-compare-grid{display:none;grid-template-columns:1fr;gap:.75rem;}
.fpt-compare-grid.fpt-compare-grid--on{display:grid;}
@media (min-width:640px){.fpt-compare-grid.fpt-compare-grid--on{grid-template-columns:repeat(3,1fr);}}
.fpt-compare-cell{border-radius:var(--fpt-r-sm);background:rgba(15,23,42,.35);border:1px solid rgba(255,255,255,.08);padding:.85rem;min-height:120px;}
.fpt-compare-cell .fpt-compare-label{display:block;font-size:.62rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:rgba(248,250,252,.5);margin-bottom:.4rem;}
.fpt-compare-body{color:#f8fafc;word-wrap:break-word;white-space:pre-wrap;font-size:.9rem;line-height:1.45;}
.fpt-compare-empty{font-size:.78rem;color:rgba(248,250,252,.45);line-height:1.4;}
.fpt-tabbar{display:flex;gap:0;margin:0 0 .75rem;border-radius:var(--fpt-r-sm);border:1px solid var(--border);overflow:hidden;background:var(--surface);}
.fpt-tab{flex:1;min-height:var(--fpt-tab-h);border:0;background:var(--surface-muted);color:var(--text-muted);font-size:.75rem;font-weight:700;letter-spacing:.03em;cursor:pointer;transition:background .15s,color .15s;-webkit-tap-highlight-color:transparent;border-right:1px solid var(--border);}
.fpt-tab:last-child{border-right:0;}
.fpt-tab[aria-selected="true"]{background:var(--surface);color:var(--primary-dark);}
.fpt-tab:focus-visible{outline:2px solid var(--primary);outline-offset:-2px;}
.fpt-panels{position:relative;}
.fpt-panel{display:none;border-radius:var(--fpt-r);border:1px solid var(--border);background:var(--surface);box-shadow:var(--shadow-soft);padding:clamp(1rem,3vw,1.25rem);}
.fpt-panel.fpt-panel--active{display:block;}
@media (min-width:900px){.fpt-tabbar{display:none;}.fpt-panels{display:grid;grid-template-columns:minmax(0,1.05fr)minmax(0,.95fr);gap:1rem;}.fpt-panel{display:block!important;border-radius:var(--fpt-r);}.fpt-panel--metrics{grid-column:1/-1;}}
.fpt-search-wrap{position:relative;margin-bottom:1rem;}
.fpt-search-wrap svg{position:absolute;left:.85rem;top:50%;transform:translateY(-50%);width:16px;height:16px;opacity:.45;pointer-events:none;}
.fpt-search{width:100%;height:46px;padding:0 1rem 0 2.5rem;border-radius:12px;border:1px solid var(--border);background:var(--surface-muted);font-size:.9rem;color:var(--text-main);}
.fpt-search:focus{outline:2px solid var(--primary);outline-offset:0;border-color:var(--primary);}
.fpt-cat-row{display:flex;gap:.45rem;overflow-x:auto;padding-bottom:.35rem;margin-bottom:1rem;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;scrollbar-width:thin;}
.fpt-cat-row::-webkit-scrollbar{height:4px;}
.fpt-cat-row::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px;}
.fpt-cat{flex:0 0 auto;scroll-snap-align:start;height:38px;padding:0 .85rem;border-radius:10px;border:1px solid var(--border);background:var(--surface-muted);font-size:.72rem;font-weight:700;color:var(--text-main);cursor:pointer;transition:border-color .15s,background .15s,box-shadow .15s;white-space:nowrap;-webkit-tap-highlight-color:transparent;}
.fpt-cat[aria-pressed="true"]{border-color:var(--primary);background:#ecfdf5;color:var(--primary-dark);box-shadow:0 0 0 2px rgba(13,148,136,.12);}
.fpt-font-scroller{max-height:min(52vh,420px);overflow-y:auto;border-radius:12px;border:1px solid var(--border);background:var(--surface-muted);}
.fpt-font-row{display:flex;align-items:center;justify-content:space-between;gap:.65rem;padding:.72rem .9rem;border-bottom:1px solid var(--border);cursor:pointer;transition:background .12s;-webkit-tap-highlight-color:transparent;}
.fpt-font-row:last-child{border-bottom:0;}
.fpt-font-row:hover{background:rgba(13,148,136,.06);}
.fpt-font-row.fpt-font-row--on{background:#ecfdf5;border-left:3px solid var(--primary);padding-left:calc(.9rem - 3px);}
.fpt-font-name{font-weight:600;font-size:.82rem;color:var(--text-main);}
.fpt-font-snippet{font-size:.72rem;color:var(--text-muted);margin-top:.15rem;}
.fpt-badge{font-size:.62rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase;padding:.2rem .45rem;border-radius:6px;background:var(--border);color:var(--text-muted);}
.fpt-badge--google{background:#e0f2fe;color:#0369a1;}
.fpt-label{display:block;font-size:.65rem;font-weight:700;letter-spacing:.07em;text-transform:uppercase;color:var(--text-muted);margin:0 0 .35rem;}
.fpt-textarea{width:100%;min-height:88px;padding:.85rem 1rem;border-radius:12px;border:1px solid var(--border);font-size:.9rem;resize:vertical;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;}
.fpt-chip-row{display:flex;flex-wrap:wrap;gap:.4rem;margin-top:.65rem;}
.fpt-chip{height:36px;padding:0 .7rem;border-radius:10px;border:1px solid var(--border);background:var(--surface);font-size:.72rem;font-weight:600;color:var(--text-main);cursor:pointer;transition:border-color .15s,background .15s;-webkit-tap-highlight-color:transparent;}
.fpt-chip:hover{border-color:var(--primary);}
.fpt-metrics-grid{display:grid;gap:1rem;}
@media (min-width:520px){.fpt-metrics-grid{grid-template-columns:repeat(2,1fr);}}
.fpt-range-val{font-size:.75rem;color:var(--text-muted);margin-top:.2rem;}
.fpt-range,.fpt-select,.fpt-color{width:100%;height:42px;border-radius:10px;border:1px solid var(--border);padding:0 .65rem;font-size:.88rem;background:var(--surface);}
.fpt-range{height:36px;padding:0;}
.fpt-color{padding:4px;height:44px;}
.fpt-live{min-height:1.25rem;font-size:.78rem;color:var(--primary-dark);font-weight:600;margin:.35rem 0 0;}
.fpt-actions-row{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:1rem;}
.fpt-btn{appearance:none;display:inline-flex;align-items:center;justify-content:center;gap:.35rem;min-height:44px;padding:0 1.1rem;border-radius:12px;font-size:.82rem;font-weight:700;border:1px solid transparent;cursor:pointer;transition:transform .12s,box-shadow .12s,background .15s;-webkit-tap-highlight-color:transparent;}
.fpt-btn:active{transform:scale(.98);}
.fpt-btn--primary{background:var(--gradient);color:#fff;box-shadow:0 4px 14px rgba(13,148,136,.35);}
.fpt-btn--ghost{background:var(--surface);color:var(--text-main);border-color:var(--border);}
.fpt-btn--quiet{background:var(--surface-muted);color:var(--text-main);border-color:var(--border);}
.fpt-samples{margin-top:1rem;display:grid;gap:.65rem;}
@media (min-width:640px){.fpt-samples{grid-template-columns:repeat(2,1fr);}}
.fpt-sample{border-radius:12px;border:1px solid var(--border);padding:.75rem .9rem;background:linear-gradient(180deg,var(--surface) 0%,var(--surface-muted) 100%);}
.fpt-sample-tag{font-size:.58rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--text-muted);margin-bottom:.35rem;}
.fpt-sample-body{line-height:1.45;color:var(--text-main);}
.fpt-prose{margin-top:2.75rem;padding-bottom:var(--fpt-safe);}
.fpt-prose h2{font-size:clamp(1.35rem,3vw,1.65rem);font-weight:800;margin:2rem 0 .75rem;line-height:1.2;color:var(--text-main);}
.fpt-prose h2:first-child{margin-top:0;}
.fpt-prose h3{font-size:1.05rem;font-weight:700;margin:1.5rem 0 .5rem;color:var(--text-main);}
.fpt-prose p{font-size:.95rem;line-height:1.65;color:var(--text-main);margin:0 0 1rem;}
.fpt-prose p.fpt-lead{font-size:1.05rem;color:var(--text-muted);}
.fpt-prose ul{margin:0 0 1rem 1.1rem;padding:0;}
.fpt-prose li{margin-bottom:.45rem;line-height:1.55;}
.fpt-callout{border-radius:var(--fpt-r-sm);border-left:4px solid var(--primary);background:var(--surface-muted);padding:1rem 1.1rem;margin:1.25rem 0;font-size:.9rem;line-height:1.55;color:var(--text-main);}
.fpt-table-wrap{overflow-x:auto;margin:1rem 0;border-radius:12px;border:1px solid var(--border);}
.fpt-table{width:100%;border-collapse:collapse;font-size:.85rem;}
.fpt-table th,.fpt-table td{padding:.75rem .85rem;text-align:left;border-bottom:1px solid var(--border);}
.fpt-table th{background:var(--surface-muted);font-size:.68rem;letter-spacing:.05em;text-transform:uppercase;color:var(--text-muted);}
.fpt-table tr:last-child td{border-bottom:0;}
.fpt-dl{margin:1rem 0 0;padding:0;}
.fpt-dl dt{font-weight:700;margin-top:.85rem;color:var(--text-main);}
.fpt-dl dt:first-child{margin-top:0;}
.fpt-dl dd{margin:.3rem 0 0 1rem;padding:0;line-height:1.55;color:var(--text-main);}