:root{
  --red:#e32d2d;
  --black:#0f0f10;
  --gray-900:#1a1a1a;
  --gray-700:#3f3f46;
  --gray-500:#6b7280;
  --gray-300:#d1d5db;
  --gray-100:#f3f4f6;
  --gray-50:#f9fafb;
  --white:#fff;
  --radius:14px;
  --shadow:0 8px 30px rgba(0,0,0,.08);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Outfit",sans-serif;
  background:linear-gradient(180deg,#fff 0%,#f7f7f8 100%);
  color:var(--gray-900);
  min-height:100vh;
}
a{color:inherit}

.hdr{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.85);backdrop-filter:saturate(140%) blur(8px);border-bottom:1px solid var(--gray-100)}
.hdr-inner{max-width:1100px;margin:0 auto;padding:.9rem 1.25rem;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:.6rem;text-decoration:none;font-weight:700;color:var(--black)}
.brand-logo{width:30px;height:30px;border-radius:8px;background:var(--red);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800}
.hdr nav{display:flex;gap:1rem}
.hdr nav a{color:var(--gray-700);text-decoration:none;font-size:.9rem;font-weight:500}
.hdr nav a:hover{color:var(--red)}

.wrap{max-width:1100px;margin:0 auto;padding:2.5rem 1.25rem 4rem}
.hero h1{margin:0 0 .5rem;font-size:clamp(2rem,4vw,3rem);line-height:1.1;letter-spacing:-.02em}
.hero .lead{color:var(--gray-500);font-size:1.1rem;max-width:600px}

.grid{display:grid;grid-template-columns:1fr 1fr;gap:1.25rem;margin-top:2rem}
@media(max-width:820px){.grid{grid-template-columns:1fr}}

.panel{background:#fff;border:1px solid var(--gray-100);border-radius:var(--radius);padding:1.5rem;box-shadow:var(--shadow)}
.panel h2{margin:0 0 1rem;font-size:1.15rem;letter-spacing:-.01em}
.panel label{display:block;margin-bottom:.9rem}
.panel label > span{display:block;font-size:.82rem;font-weight:600;color:var(--gray-700);margin-bottom:.3rem}
.panel input[type=text],.panel textarea,.panel select{
  width:100%;padding:.55rem .7rem;border:1px solid var(--gray-300);border-radius:8px;font-size:.95rem;font-family:inherit;background:#fff;color:var(--gray-900)
}
.panel input:focus,.panel textarea:focus,.panel select:focus{outline:0;border-color:var(--red);box-shadow:0 0 0 3px rgba(227,45,45,.15)}
.panel small{color:var(--gray-500);font-size:.75rem;display:block;margin-top:.25rem}
.panel code{background:var(--gray-100);padding:1px 5px;border-radius:4px;font-size:.85em}

.color-row{display:flex;gap:.5rem;align-items:center}
.color-row input[type=color]{width:42px;height:42px;border:1px solid var(--gray-300);border-radius:8px;background:#fff;cursor:pointer;padding:2px}
.color-row input[type=text]{flex:1;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;text-transform:uppercase}

.check{display:flex !important;align-items:center;gap:.5rem;cursor:pointer}
.check input{width:18px;height:18px;margin:0}
.check span{margin:0 !important;font-weight:500 !important;color:var(--gray-900) !important}

.btn-primary,.btn-ghost{display:inline-block;width:100%;padding:.75rem 1rem;border-radius:10px;font-size:.95rem;font-weight:600;cursor:pointer;font-family:inherit;border:0;margin-top:.4rem;transition:transform .1s ease,background .15s ease}
.btn-primary{background:var(--red);color:#fff;box-shadow:0 4px 14px rgba(227,45,45,.3)}
.btn-primary:hover{background:#c91a1a;transform:translateY(-1px)}
.btn-ghost{background:#fff;color:var(--gray-700);border:1px solid var(--gray-300)}
.btn-ghost:hover{background:var(--gray-50);border-color:var(--gray-500)}

.muted{color:var(--gray-500);font-size:.92rem;margin:0 0 .9rem}
.preview-card{position:relative;border-radius:12px;overflow:hidden;border:1px dashed var(--gray-300);background:repeating-linear-gradient(45deg,#fafafa,#fafafa 10px,#f3f4f6 10px,#f3f4f6 20px);height:200px;display:flex;align-items:center;justify-content:center;padding:1rem}
.preview-card__hint{background:#fff;border-radius:10px;padding:.85rem 1rem;max-width:300px;box-shadow:0 4px 14px rgba(0,0,0,.05);font-size:.85rem;color:var(--gray-700)}
.preview-card__hint strong{display:block;color:var(--red);font-size:.78rem;text-transform:uppercase;letter-spacing:.05em;margin-bottom:.25rem}
.preview-card__hint p{margin:0;line-height:1.5}

.snippet{background:#0f0f10;color:#e5e7eb;padding:1rem 1.1rem;border-radius:10px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.78rem;line-height:1.55;overflow-x:auto;margin:0 0 .75rem;border:1px solid #1f2937}

.features{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem;margin-top:3rem}
@media(max-width:820px){.features{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.features{grid-template-columns:1fr}}
.feat{background:#fff;border:1px solid var(--gray-100);border-radius:12px;padding:1.25rem}
.feat-ico{font-size:1.5rem;margin-bottom:.5rem}
.feat h3{margin:.25rem 0;font-size:1rem}
.feat p{margin:0;color:var(--gray-500);font-size:.88rem;line-height:1.5}

.ftr{max-width:1100px;margin:0 auto;padding:2rem 1.25rem;display:flex;justify-content:space-between;color:var(--gray-500);font-size:.85rem;border-top:1px solid var(--gray-100)}
.ftr a{color:var(--red);text-decoration:none;margin-left:.5rem}
.ftr a:hover{text-decoration:underline}

.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:#0f0f10;color:#fff;padding:.6rem 1rem;border-radius:8px;font-size:.85rem;box-shadow:0 8px 24px rgba(0,0,0,.2);z-index:2147483700;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s}
.toast.show{opacity:1;transform:translateX(-50%) translateY(-4px)}