*,:before,:after{box-sizing:border-box}html,body{height:100%;margin:0;padding:0}:root{--tt-bg:#f5f6f8;--tt-card:#fff;--tt-border:#e6e8ec;--tt-text:#0f172a;--tt-muted:#64748b;--tt-primary:#4f46e5;--tt-primary-hover:#4338ca;--tt-danger:#dc2626;--tt-warning:#f59e0b;--tt-radius:18px;--tt-radius-sm:12px;--tt-gap-xs:8px;--tt-gap-sm:12px;--tt-gap-md:16px;--tt-gap-lg:24px;--tt-gap-xl:32px}html{background:var(--tt-bg)}body{background:var(--tt-bg);color:var(--tt-text);font-family:-apple-system,BlinkMacSystemFont,SF Pro Display,SF Pro Text,Inter,system-ui,Roboto,Helvetica,Arial,sans-serif;line-height:1.4}.heading-lg{font-size:22px;font-weight:600}.heading-md{font-size:18px;font-weight:600}.text-muted{color:var(--tt-muted)}.text-sm{font-size:14px}.card{background:var(--tt-card);border-radius:var(--tt-radius);border:1px solid var(--tt-border);padding:var(--tt-gap-md)}.card+.card{margin-top:var(--tt-gap-md)}.btn{appearance:none;border-radius:var(--tt-radius-sm);cursor:pointer;border:none;padding:12px 16px;font-size:15px;font-weight:500;transition:background .15s,transform 50ms}.btn:active{transform:scale(.98)}.btn-primary{background:var(--tt-primary);color:#fff}.btn-primary:hover{background:var(--tt-primary-hover)}.btn-secondary{color:var(--tt-text);background:#f1f5f9}.btn-outline{border:1px solid var(--tt-border);background:#fff}.btn-danger{background:var(--tt-danger);color:#fff}.btn-warning{background:var(--tt-warning);color:#fff}.btn:disabled{opacity:.5;cursor:not-allowed}input,select,textarea{border-radius:var(--tt-radius-sm);border:1px solid var(--tt-border);width:100%;padding:12px 14px;font-family:inherit;font-size:15px}input:focus,select:focus,textarea:focus{border-color:var(--tt-primary);outline:none}.safe-area{padding-top:env(safe-area-inset-top);padding-bottom:env(safe-area-inset-bottom)}.flex{display:flex}.flex-between{justify-content:space-between;align-items:center;display:flex}.stack{gap:var(--tt-gap-md);flex-direction:column;display:flex}.center{justify-content:center;align-items:center;display:flex}