:root{--sprk-green:#111;--sprk-green-hover:#000;--sprk-green-shadow:#000;--sprk-blue:#111;--sprk-blue-shadow:#000;--sprk-purple:#111;--sprk-purple-shadow:#000;--sprk-yellow:#444;--sprk-red:#111;--sprk-red-shadow:#000;--sprk-ink:#111;--sprk-ink-soft:#666;--sprk-line:#e0e0e0;--sprk-line-soft:#f2f2f2;--sprk-bg:#fff;--sprk-bg-soft:#fafafa;--sprk-card:#fff;--sprk-radius:16px;--sprk-radius-lg:24px;--sprk-shadow:0 2px 0 #0000000f;--sprk-shadow-card:0 4px 16px #0000000f;--sprk-sidebar-w:240px}*{box-sizing:border-box}body{-webkit-font-smoothing:antialiased;background:#fff;background:var(--sprk-bg);color:#111;color:var(--sprk-ink);font-family:Nunito,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;margin:0}.sprk-btn{align-items:center;border:none;border-radius:16px;border-radius:var(--sprk-radius);cursor:pointer;display:inline-flex;font-family:inherit;font-size:.95rem;font-weight:800;gap:.5rem;justify-content:center;letter-spacing:.02em;padding:.85rem 1.5rem;text-decoration:none;text-transform:uppercase;transition:filter .1s,transform .05s;-webkit-user-select:none;user-select:none}.sprk-btn:active{transform:translateY(2px)}.sprk-btn-primary{background:#111;background:var(--sprk-green);box-shadow:0 4px 0 #000;box-shadow:0 4px 0 var(--sprk-green-shadow);color:#fff}.sprk-btn-primary:hover{filter:brightness(1.05)}.sprk-btn-primary:active{box-shadow:0 2px 0 #000;box-shadow:0 2px 0 var(--sprk-green-shadow)}.sprk-btn-blue{background:#111;background:var(--sprk-blue);box-shadow:0 4px 0 #000;box-shadow:0 4px 0 var(--sprk-blue-shadow);color:#fff}.sprk-btn-blue:active{box-shadow:0 2px 0 #000;box-shadow:0 2px 0 var(--sprk-blue-shadow)}.sprk-btn-ghost{background:#fff;border:2px solid #e0e0e0;border:2px solid var(--sprk-line);box-shadow:0 4px 0 #e0e0e0;box-shadow:0 4px 0 var(--sprk-line);color:#111;color:var(--sprk-blue);text-transform:uppercase}.sprk-btn-ghost:hover{background:#fafafa;background:var(--sprk-bg-soft)}.sprk-btn-danger{background:#111;background:var(--sprk-red);box-shadow:0 4px 0 #000;box-shadow:0 4px 0 var(--sprk-red-shadow);color:#fff}.sprk-btn:disabled{box-shadow:none;cursor:not-allowed;opacity:.5;transform:none}.sprk-btn-full{width:100%}.sprk-card{background:#fff;background:var(--sprk-card);border:2px solid #e0e0e0;border:2px solid var(--sprk-line);border-radius:24px;border-radius:var(--sprk-radius-lg);box-shadow:0 4px 16px #0000000f;box-shadow:var(--sprk-shadow-card)}.sprk-input{background:#fafafa;background:var(--sprk-bg-soft);border:2px solid #e0e0e0;border:2px solid var(--sprk-line);border-radius:16px;border-radius:var(--sprk-radius);color:#111;color:var(--sprk-ink);font-family:inherit;font-size:1rem;outline:none;padding:.9rem 1rem;transition:border-color .15s,background .15s;width:100%}.sprk-input:focus{background:#fff;border-color:#111;border-color:var(--sprk-blue)}.sprk-input::placeholder{color:#aaa}.sprk-alert{background:#fff0f0;border:2px solid #ffd0d0;border-radius:16px;border-radius:var(--sprk-radius);color:#000;color:var(--sprk-red-shadow);font-size:.9rem;font-weight:700;margin-bottom:1rem;padding:.75rem 1rem}.sprk-alert-success{background:#f0fff0;border-color:#c8f0c8;color:#000;color:var(--sprk-green-shadow)}.sprk-divider{align-items:center;color:#666;color:var(--sprk-ink-soft);display:flex;font-size:.85rem;font-weight:700;margin:1.25rem 0;text-align:center}.sprk-divider:after,.sprk-divider:before{background:#e0e0e0;background:var(--sprk-line);content:"";flex:1 1;height:2px}.sprk-divider span{padding:0 .75rem}.sprk-muted{color:#666;color:var(--sprk-ink-soft)}