/* whitelabel-signatures · signatures.whitelabel.dev
   Static early-access landing. Monochrome whitelabel system. */

:root{
  --bg:#ffffff; --bg-soft:#f6f6f7; --bg-stage:#f1f1f1;
  --ink:#050505; --ink-soft:rgba(5,5,5,.62); --ink-quiet:rgba(5,5,5,.42);
  --line:rgba(5,5,5,.14); --line-soft:rgba(5,5,5,.07);
  --brand:#1f4cd8;
  --font-mono:'JetBrains Mono',ui-monospace,'SF Mono',monospace;
  --font-sans:'Inter',system-ui,-apple-system,sans-serif;
}
*{box-sizing:border-box}
/* ensure the hidden attribute always wins over element display rules
   (e.g. .logo-thumb-wrap{display:inline-flex} / .mini-x{display:flex}) */
[hidden]{display:none!important}
html,body{margin:0;padding:0;background:var(--bg);color:var(--ink);font-family:var(--font-sans);-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
::selection{background:var(--ink);color:var(--bg)}

/* topbar */
.topbar{position:fixed;top:0;left:0;right:0;z-index:50;display:flex;align-items:center;justify-content:space-between;
  padding:1.1rem 2rem;background:linear-gradient(180deg,rgba(255,255,255,.92),rgba(255,255,255,.6));
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border-bottom:1px solid var(--line-soft)}
.brand{display:inline-flex;align-items:center;gap:.65rem;font-family:var(--font-mono);font-size:.75rem;letter-spacing:.12em;text-transform:lowercase}
.brand-mark{display:inline-block;width:1rem;height:1rem;border:1.5px solid var(--ink);position:relative}
.brand-mark::after{content:'';position:absolute;inset:28%;border:1.5px solid var(--ink)}
.brand-name{font-weight:500}
.brand-dot{color:rgba(5,5,5,.45)}
.brand-sub{color:rgba(5,5,5,.45);padding-left:.35rem;border-left:1px solid var(--line-soft);margin-left:.35rem}
.topbar nav{display:flex;gap:1.2rem}
.topbar nav a{color:var(--ink-soft);font-family:var(--font-mono);font-size:.72rem;letter-spacing:.12em;text-transform:lowercase;transition:color .2s}
.topbar nav a:hover{color:var(--ink)}

main{max-width:60rem;margin:0 auto;padding:8rem 2rem 4rem}

.eyebrow,.scene-num{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-quiet);margin:0 0 .8rem}
.hero h1{font-weight:200;font-size:clamp(2.4rem,7vw,4.2rem);line-height:1.02;letter-spacing:-.025em;margin:0 0 1rem}
.hero h1 b{font-weight:600}
.hero-sub{color:var(--ink-soft);max-width:38rem;line-height:1.65;font-size:1.05rem;margin:0 0 1.1rem}
.hero-status{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.04em;color:var(--ink-quiet)}

.hero{margin-bottom:2.2rem}
.hero h1{font-size:clamp(2rem,5.5vw,3.2rem)}
.hero-sub{margin-bottom:0}

/* builder — form + live preview */
.builder{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:1.8rem;align-items:start}
@media(max-width:820px){.builder{grid-template-columns:1fr}}

.sig-form{display:flex;flex-direction:column;gap:1.6rem}
.form-section{border:1px solid var(--line-soft);background:var(--bg-soft);padding:1.1rem 1.2rem;display:flex;flex-direction:column;gap:.7rem}
.form-eyebrow{font-family:var(--font-mono);font-size:.66rem;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-quiet);margin:0}
/* section header: eyebrow + on/off switch */
.section-head{display:flex;align-items:center;justify-content:space-between;gap:.8rem}
.section-head .form-eyebrow{margin:0}
.toggle{position:relative;display:inline-flex;align-items:center;cursor:pointer}
.toggle input{position:absolute;width:1px;height:1px;opacity:0;margin:0}
.toggle-track{width:30px;height:17px;border-radius:999px;background:var(--line);position:relative;transition:background .18s}
.toggle-track::after{content:'';position:absolute;top:2px;left:2px;width:13px;height:13px;border-radius:50%;background:#fff;transition:transform .18s;box-shadow:0 1px 2px rgba(5,5,5,.25)}
.toggle input:checked + .toggle-track{background:var(--ink)}
.toggle input:checked + .toggle-track::after{transform:translateX(13px)}
.toggle input:focus-visible + .toggle-track{outline:2px solid var(--ink);outline-offset:2px}
/* a disabled section dims + locks its body, header switch stays live */
.form-section.off .field,.form-section.off .field-row,.form-section.off .logo-controls{opacity:.38;pointer-events:none}
.field{display:flex;flex-direction:column;gap:.3rem}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:.7rem}
.field label{font-family:var(--font-mono);font-size:.6rem;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-quiet)}
.field input,.field select{border:1px solid var(--line);background:#fff;color:var(--ink);font-family:var(--font-sans);font-size:.92rem;padding:.5rem .6rem;border-radius:.25rem;width:100%}
.field-hint{font-family:var(--font-mono);font-size:.6rem;line-height:1.6;color:var(--ink-quiet);letter-spacing:.02em;margin:.15rem 0 0}
.field-hint code{background:var(--bg-stage);border:1px solid var(--line-soft);border-radius:3px;padding:0 .25rem;font-size:.95em}
.field input:focus,.field select:focus{outline:none;border-color:var(--ink)}
.field input[type=color]{padding:.2rem;height:2.3rem;cursor:pointer}
.logo-controls{display:flex;align-items:center;gap:.6rem;margin-top:.2rem}
.mini-btn{font-family:var(--font-mono);font-size:.62rem;letter-spacing:.06em;text-transform:lowercase;padding:.4rem .65rem;border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:.25rem;cursor:pointer}
.mini-btn:hover{border-color:var(--ink)}
.logo-thumb-wrap{display:inline-flex;align-items:center;gap:.35rem}
#logo-thumb{height:2rem;width:auto;max-width:5rem;object-fit:contain;border-radius:.25rem;border:1px solid var(--line);background:#fff}
.mini-x{width:1.3rem;height:1.3rem;border-radius:50%;border:1px solid var(--line);background:#fff;color:var(--ink-soft);cursor:pointer;font-size:.9rem;line-height:1;display:flex;align-items:center;justify-content:center;padding:0}
.mini-x:hover{border-color:var(--ink);color:var(--ink)}

/* preview */
.preview-pane{position:sticky;top:5.5rem;display:flex;flex-direction:column;gap:.8rem}
.preview-head{display:flex;align-items:center;justify-content:space-between;gap:.8rem;flex-wrap:wrap}
.preview-actions{display:flex;gap:.5rem}
.btn{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.06em;text-transform:lowercase;padding:.5rem .8rem;border:1px solid var(--ink);background:var(--ink);color:#fff;cursor:pointer;border-radius:.25rem}
.btn.ghost{background:#fff;color:var(--ink)}
.btn:active{transform:translateY(1px)}
.preview-frame{border:1px solid var(--line);border-radius:.5rem;overflow:hidden;background:#fff;box-shadow:0 14px 40px rgba(5,5,5,.07)}
.preview-mailrow{background:var(--bg-stage);border-bottom:1px solid var(--line-soft);padding:.6rem .9rem}
.mail-meta{font-family:var(--font-mono);font-size:.62rem;color:var(--ink-quiet);letter-spacing:.03em}
.preview-body{padding:1.4rem}
.preview-msg{margin:0 0 1.2rem;color:var(--ink-soft);font-size:.95rem}
#sig-preview{min-height:64px}
.preview-note{font-family:var(--font-mono);font-size:.62rem;line-height:1.6;color:var(--ink-quiet);letter-spacing:.02em;margin:0}

.bottombar{border-top:1px solid var(--line-soft);padding:1.4rem 2rem;display:flex;justify-content:space-between;font-family:var(--font-mono);font-size:.68rem;letter-spacing:.08em;color:var(--ink-quiet)}
.bottombar a:hover{color:var(--ink)}