:root{--bg:#000000;--fg:#ffffff;--muted:rgba(255,255,255,0.65);--glass-bg-1:rgba(255,255,255,0.02);--glass-bg-2:rgba(255,255,255,0.01);--glass-border:rgba(255,255,255,0.18)}*{box-sizing:border-box}body,html{height:100%;margin:0}body{background:var(--bg);color:var(--fg);display:grid;place-items:center;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;letter-spacing:.02em}.container{display:grid;place-items:center;grid-gap:1rem;gap:1rem;padding:2rem;text-align:center;position:relative;z-index:1}.title{font-weight:700;font-size:clamp(2.6rem,8vw,6rem);line-height:1.05;letter-spacing:.06em;-webkit-user-select:none;-moz-user-select:none;user-select:none;white-space:pre}.title:after{content:"▌";margin-left:.25ch;opacity:.7;animation:blink 1.05s step-end infinite}@keyframes blink{50%{opacity:0}}.bg-canvas{position:fixed;inset:0;z-index:0;pointer-events:none}.bg-canvas canvas{width:100%;height:100%;display:block;filter:contrast(120%) brightness(180%);opacity:.32}.gate{position:fixed;inset:0;display:grid;place-items:center;background:rgba(0,0,0,.35);backdrop-filter:blur(16px) saturate(140%);-webkit-backdrop-filter:blur(16px) saturate(140%)}.gate-card{width:min(92vw,420px);background:linear-gradient(135deg,var(--glass-bg-1),var(--glass-bg-2));border:1px solid var(--glass-border);border-radius:16px;padding:22px;color:var(--fg);box-shadow:0 10px 30px rgba(0,0,0,.55),inset 0 0 0 1px rgba(255,255,255,.06);display:grid;grid-gap:14px;gap:14px}.gate-title{margin:0;font-size:1.05rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}.input-row{display:grid;grid-template-columns:1fr auto;grid-gap:10px;gap:10px;align-items:center}input[type=text]{width:100%;background:rgba(255,255,255,.08);color:var(--fg);border:1px solid var(--glass-border);border-radius:12px;padding:12px 14px;outline:none;transition:border-color .16s ease,background .16s ease;caret-color:var(--fg)}input[type=text]::placeholder{color:rgba(255,255,255,.55)}input[type=text]:focus{border-color:rgba(255,255,255,.65);background:rgba(255,255,255,.12)}button[type=submit]{background:var(--fg);color:var(--bg);border:0;border-radius:12px;padding:12px 16px;font-weight:700;letter-spacing:.06em;cursor:pointer;transition:opacity .16s ease,transform 80ms ease}button[type=submit]:active{transform:translateY(1px)}button[type=submit]:hover{opacity:.92}.error{min-height:1em;color:var(--fg);opacity:.8;font-size:.85rem;letter-spacing:.04em}.header{right:16px}.header,.header-left{position:fixed;top:16px;z-index:2}.header-left{left:16px}.header-right{position:fixed;top:16px;right:16px;z-index:2}.btn{background:var(--fg);color:var(--bg);border:0;border-radius:999px;padding:10px 16px;font-weight:700;letter-spacing:.06em;cursor:pointer;text-decoration:none;transition:opacity .16s ease,transform 80ms ease}.btn:hover{opacity:.92}.btn:active{transform:translateY(1px)}.btn-ghost{background:transparent;color:var(--fg);border:1px solid var(--glass-border);border-radius:999px;padding:10px 16px}.icon-button{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;padding:0}.icon-x{width:22px;height:22px;transition:transform .2s ease}.icon-button:hover .icon-x{transform:rotate(-6deg) scale(1.06)}.riddle{color:var(--muted);font-size:.95rem;line-height:1.5;display:grid;grid-gap:6px;gap:6px}@media (prefers-reduced-motion:reduce){.title:after{display:none}}