:root{color:#111827;background:#f8fafc;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:radial-gradient(circle at top left,rgba(59,130,246,.14),transparent 30rem),radial-gradient(circle at bottom right,rgba(16,185,129,.13),transparent 28rem),#f8fafc}button,input,select{font:inherit}button{cursor:pointer}.app-shell,.auth-shell{width:min(1120px,100%);margin:0 auto;padding:max(24px,env(safe-area-inset-top)) 16px 40px}.auth-shell{min-height:100vh;display:grid;place-items:center}.hero{display:flex;justify-content:space-between;gap:16px;align-items:flex-start;padding:24px;margin-bottom:16px;color:#f9fafb;background:linear-gradient(135deg,#111827,#1f2937);border-radius:28px;box-shadow:0 24px 60px #0f172a38}.hero h1,.auth-card h1{margin:0;letter-spacing:-.04em}.hero p{margin:8px 0 0;color:#d1d5db}.eyebrow{margin:0 0 6px;font-size:.78rem;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:#60a5fa}.grid{display:grid;gap:16px;margin-top:16px}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.card,.auth-card{background:#ffffffeb;border:1px solid rgba(148,163,184,.28);border-radius:24px;box-shadow:0 18px 44px #0f172a14;padding:20px;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.auth-card{width:min(440px,100%)}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}.section-heading h2,h3{margin:0}h3{margin-top:18px;margin-bottom:10px;font-size:1rem}.section-heading span,.hint,.muted{color:#64748b}.hint,.muted{font-size:.9rem}.notice{margin:12px 0;padding:12px 14px;background:#eff6ff;border:1px solid #bfdbfe;border-radius:16px;color:#1e3a8a}label{display:grid;gap:6px;font-size:.9rem;font-weight:700;color:#334155}input,select{width:100%;border:1px solid #cbd5e1;border-radius:14px;background:#fff;color:#111827;padding:12px 13px;outline:none}input:focus,select:focus{border-color:#3b82f6;box-shadow:0 0 0 4px #3b82f61f}.primary-button,.ghost-button,.small-button,.danger-button,.link-button{border:0;border-radius:999px;padding:11px 16px;font-weight:800;transition:transform .15s ease,opacity .15s ease}.primary-button{background:#111827;color:#fff}.primary-button:disabled{opacity:.5;cursor:not-allowed}.ghost-button{background:#ffffff1f;color:#fff;border:1px solid rgba(255,255,255,.2)}.small-button{padding:8px 12px;background:#e0f2fe;color:#075985}.danger-button{padding:7px 10px;background:#fee2e2;color:#991b1b;font-size:.82rem}.link-button{padding:0;background:transparent;color:#2563eb;text-align:left}.primary-button:hover,.ghost-button:hover,.small-button:hover,.danger-button:hover{transform:translateY(-1px)}.inline-form{display:grid;grid-template-columns:1fr 120px auto;gap:8px;margin-bottom:14px}.stack-form,.auth-card{display:grid;gap:12px}.form-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.space-list,.list,.balance-list{display:grid;gap:10px}.space-item,.list-item,.balance-row,.settlement-suggestion{width:100%;display:flex;justify-content:space-between;gap:12px;align-items:center;padding:12px;border-radius:18px;border:1px solid #e2e8f0;background:#fff;text-align:left}.space-item.active{border-color:#111827;background:#f1f5f9}.space-item span,.list-item strong,.balance-row span,.settlement-suggestion strong{font-weight:850}.space-item small,.list-item p,.settlement-suggestion p{margin:4px 0 0;color:#64748b}.member-pills{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}.member-pills span{padding:8px 10px;border-radius:999px;background:#f1f5f9;color:#334155;font-weight:800;font-size:.86rem}.balance-row{border:0;background:#f8fafc}.positive{color:#047857}.negative{color:#b91c1c}.right-actions{display:grid;justify-items:end;gap:8px;white-space:nowrap}.settlement-box{display:grid;gap:10px;margin-bottom:12px}@media(max-width:820px){.hero,.grid.two,.form-row{grid-template-columns:1fr}.hero{display:grid}.inline-form{grid-template-columns:1fr}.list-item,.settlement-suggestion{align-items:flex-start}}