/* GenerateRandomLetter — shared design system (static, no build step) */
:root{
  --bg:#f5f6fb;
  --card:#ffffff;
  --ink:#191c28;
  --muted:#5d6376;
  --line:#e7e9f2;
  --brand:#6c4cf1;
  --brand-dark:#5533d6;
  --brand2:#00b894;
  --accent:#ff9f43;
  --hero-grad:linear-gradient(135deg,#6c4cf1 0%,#8b5cf6 45%,#00b894 110%);
  --radius:16px;
  --shadow:0 10px 30px rgba(28,20,80,.08);
  --shadow-sm:0 4px 14px rgba(28,20,80,.07);
  --font:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--ink);line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-weight:800;font-size:1.15rem;color:var(--ink);display:flex;align-items:center;gap:8px}
.logo:hover{text-decoration:none}
.logo .mark{width:34px;height:34px;border-radius:10px;background:var(--hero-grad);display:inline-flex;align-items:center;justify-content:center;font-size:1.1rem;color:#fff;font-weight:800}
.nav{display:flex;gap:4px;align-items:center}
.nav a{color:var(--muted);font-weight:600;font-size:.92rem;padding:8px 12px;border-radius:10px}
.nav a:hover{background:#efeff7;color:var(--ink);text-decoration:none}
.nav a.cta{background:var(--brand);color:#fff}
.nav a.cta:hover{background:var(--brand-dark)}
@media(max-width:640px){.nav a:not(.cta){display:none}}

/* Hero */
.hero{background:var(--hero-grad);color:#fff;padding:64px 0 72px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;background:radial-gradient(600px 300px at 85% 10%,rgba(255,255,255,.18),transparent 60%);pointer-events:none}
.hero h1{font-size:clamp(2rem,4.5vw,3.1rem);line-height:1.15;font-weight:800;letter-spacing:-.02em;max-width:760px}
.hero p{opacity:.92;font-size:1.1rem;max-width:640px;margin:14px 0 26px}
.hero .btn-row{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:700;padding:13px 22px;border-radius:12px;border:0;cursor:pointer;font-size:1rem;transition:transform .12s ease,box-shadow .12s ease}
.btn:active{transform:scale(.97)}
.btn-light{background:#fff;color:var(--brand-dark);box-shadow:var(--shadow)}
.btn-ghost{background:rgba(255,255,255,.16);color:#fff;border:1px solid rgba(255,255,255,.35)}
.btn-ghost:hover{background:rgba(255,255,255,.25);text-decoration:none}
.btn-brand{background:var(--brand);color:#fff;box-shadow:var(--shadow-sm)}
.btn-brand:hover{background:var(--brand-dark)}
.btn-big{font-size:1.15rem;padding:16px 30px}
.hero-stats{display:flex;gap:28px;margin-top:30px;flex-wrap:wrap}
.hero-stats div strong{font-size:1.5rem;display:block}
.hero-stats div span{opacity:.85;font-size:.9rem}

/* Tool grid */
.section{padding:56px 0}
.section h2{font-size:1.7rem;letter-spacing:-.01em;margin-bottom:6px}
.section .sub{color:var(--muted);margin-bottom:28px;max-width:680px}
.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
.tool-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow-sm);transition:transform .15s ease,box-shadow .15s ease;display:block;color:var(--ink)}
.tool-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);text-decoration:none}
.tool-card .icon{font-size:2rem;display:block;margin-bottom:10px}
.tool-card h3{font-size:1.05rem;margin-bottom:6px}
.tool-card p{color:var(--muted);font-size:.9rem;line-height:1.5}
.tool-card .tag{display:inline-block;margin-top:10px;font-size:.72rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--brand);background:#efebff;padding:3px 10px;border-radius:99px}

/* Tool page */
.crumbs{font-size:.85rem;color:var(--muted);padding:22px 0 0}
.crumbs a{color:var(--muted)}
.tool-hero{background:var(--card);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);padding:34px;margin:18px 0 26px}
.tool-hero h1{font-size:clamp(1.6rem,3.5vw,2.3rem);letter-spacing:-.02em;margin-bottom:8px}
.tool-hero .lede{color:var(--muted);max-width:720px}
.tool-stage{background:#14161f;border-radius:var(--radius);padding:34px 22px;margin:22px 0;color:#fff;text-align:center;position:relative;overflow:hidden}
.tool-stage .result{font-size:clamp(2.4rem,7vw,4.2rem);font-weight:800;letter-spacing:.02em;min-height:1.4em;display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:14px}
.tool-stage .result.small{font-size:clamp(1.2rem,3.5vw,1.8rem);font-weight:600}
.controls{display:flex;gap:12px;flex-wrap:wrap;justify-content:center;margin-top:22px;align-items:end}
.field{display:flex;flex-direction:column;gap:6px;text-align:left}
.field label{font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:#a7abc0}
.field input,.field select{background:#22262f;border:1px solid #343947;color:#fff;border-radius:10px;padding:10px 14px;font-size:1rem;font-family:var(--font);min-width:0}
.field input:focus,.field select:focus{outline:2px solid var(--brand);border-color:var(--brand)}
.checks{display:flex;gap:14px;flex-wrap:wrap;justify-content:center;margin-top:16px;color:#c9cddd;font-size:.92rem}
.checks label{display:flex;align-items:center;gap:7px;cursor:pointer}
.checks input{accent-color:var(--brand);width:17px;height:17px}
.history{margin-top:20px;font-size:.85rem;color:#8b90a7}
.history code{background:#22262f;padding:2px 8px;border-radius:6px;margin:2px;display:inline-block;color:#dfe3f5}
.copy-btn{background:#2a2f3d;color:#fff;border:1px solid #3a4053;border-radius:10px;padding:10px 16px;font-weight:700;cursor:pointer;font-size:.9rem}
.copy-btn:hover{background:#343b4f}

/* Content sections */
.prose{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:32px;box-shadow:var(--shadow-sm);margin-bottom:22px}
.prose h2{font-size:1.35rem;margin:26px 0 10px}
.prose h2:first-child{margin-top:0}
.prose h3{font-size:1.05rem;margin:18px 0 8px}
.prose p,.prose li{color:#3c4152}
.prose ul,.prose ol{padding-left:22px;margin:10px 0}
.prose li{margin-bottom:6px}
.faq details{background:#f8f9fd;border:1px solid var(--line);border-radius:12px;padding:16px 18px;margin-bottom:10px}
.faq summary{font-weight:700;cursor:pointer}
.faq p{margin-top:8px;color:var(--muted);font-size:.95rem}

/* Ad slots */
.ad-slot{background:#eef0f6;border:1px dashed #c6cadb;border-radius:12px;color:#9aa0b5;font-size:.8rem;text-align:center;padding:26px 10px;margin:24px 0;letter-spacing:.03em}

/* Features */
.feat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.feat{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-sm)}
.feat .icon{font-size:1.7rem}
.feat h3{margin:10px 0 6px;font-size:1.02rem}
.feat p{color:var(--muted);font-size:.92rem}

/* Footer */
footer{background:#14161f;color:#a7abc0;margin-top:40px}
footer .wrap{padding-top:44px;padding-bottom:30px}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:28px;margin-bottom:28px}
@media(max-width:700px){.foot-grid{grid-template-columns:1fr}}
footer h4{color:#fff;font-size:.95rem;margin-bottom:12px}
footer a{color:#a7abc0;font-size:.9rem;display:block;margin-bottom:8px}
footer a:hover{color:#fff}
.foot-brand{color:#fff;font-weight:800;font-size:1.05rem;margin-bottom:10px;display:flex;align-items:center;gap:8px}
.foot-brand .mark{width:30px;height:30px;border-radius:8px;background:var(--hero-grad);display:inline-flex;align-items:center;justify-content:center;color:#fff;font-size:.95rem}
.foot-bottom{border-top:1px solid #262a38;padding-top:20px;font-size:.82rem;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

/* Wheel */
.wheel-wrap{display:flex;gap:26px;flex-wrap:wrap;justify-content:center;align-items:flex-start}
#wheel{max-width:100%;height:auto}
.wheel-inputs{background:#22262f;border:1px solid #343947;border-radius:12px;padding:18px;width:100%;max-width:340px;text-align:left}
.wheel-inputs textarea{width:100%;min-height:170px;background:#14161f;border:1px solid #343947;color:#fff;border-radius:10px;padding:12px;font-family:var(--font);font-size:.95rem;resize:vertical}
.wheel-inputs .btn{width:100%;justify-content:center;margin-top:10px}

/* Confetti canvas */
#confetti{position:fixed;inset:0;pointer-events:none;z-index:99}

/* Misc */
.pill-list{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin-top:18px}
.pill{background:#22262f;border:1px solid #3a4053;color:#dfe3f5;padding:8px 16px;border-radius:99px;font-weight:600;cursor:pointer;font-size:.95rem}
.pill:hover{background:#2c3242}
.pill.active{background:var(--brand);border-color:var(--brand);color:#fff}
.big-letter{font-size:clamp(5rem,18vw,10rem);font-weight:800;line-height:1;background:linear-gradient(180deg,#fff,#b9a8ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.dice{font-size:4rem;line-height:1}
.coin{width:150px;height:150px;border-radius:50%;background:radial-gradient(circle at 35% 35%,#ffe9a8,#f5b942 60%,#d99a26);display:flex;align-items:center;justify-content:center;font-size:3.2rem;font-weight:800;color:#7a4d00;box-shadow:0 12px 30px rgba(0,0,0,.35);margin:6px auto;transition:transform .6s}
.color-swatch{width:120px;height:120px;border-radius:16px;margin:4px auto;box-shadow:0 8px 22px rgba(0,0,0,.3);border:3px solid rgba(255,255,255,.25)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}