.app{width:100%;max-width:1100px;padding:24px 24px 48px;margin:0 auto}.app-header{text-align:center;margin-bottom:32px}.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;background:#f0f2f5}.logout-btn{margin-top:8px;background:none;border:none;font-size:.8rem;color:#aaa;cursor:pointer;text-decoration:underline}.logout-btn:hover{color:#555}.app-header h1{font-size:1.75rem;font-weight:700;color:#1a1a2e}.mode-selector{display:flex;flex-direction:column;align-items:center;gap:12px;margin-bottom:36px}.mode-selector-label{font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:#aaa;margin:0}.mode-tabs{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}.mode-tab{padding:10px 20px;border-radius:8px;border:1.5px solid #e0e0e0;background:#fff;font-size:.9rem;font-weight:500;color:#555;cursor:pointer;transition:all .15s}.mode-tab:hover:not(.active){border-color:#aaa;color:#333}.mode-tab.active{border-color:#4f46e5;background:#eef2ff;color:#4f46e5;font-weight:600}.calc-row{display:flex;flex-direction:row;gap:20px;align-items:flex-start}.calc-row>.card{flex:1 1 0;min-width:0}.placeholder-screen{display:flex;justify-content:center;padding:48px 0}.placeholder-card{background:#fff;border-radius:12px;padding:48px 40px;box-shadow:0 2px 12px #00000014;text-align:center;max-width:440px;width:100%}.placeholder-icon{font-size:2.4rem;margin-bottom:16px;color:#b7b8b8}.placeholder-title{font-size:1.25rem;font-weight:700;color:#1a1a2e;margin:0 0 12px}.placeholder-body{font-size:.9rem;color:#888;line-height:1.6;margin:0}.card{background:#fff;border-radius:12px;padding:28px 24px;box-shadow:0 2px 12px #00000014;display:flex;flex-direction:column;gap:20px}.card-title{font-size:1rem;font-weight:600;color:#1a1a2e;margin:0;padding-bottom:4px;border-bottom:1.5px solid #f0f0f0}.field-label{display:block;font-size:.8rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:#888;margin-bottom:8px}.radio-group{display:flex;gap:8px;flex-wrap:wrap}.radio-btn{display:flex;align-items:center;gap:6px;padding:8px 14px;border-radius:8px;border:1.5px solid #e0e0e0;cursor:pointer;font-size:.875rem;font-weight:500;transition:all .15s;-webkit-user-select:none;user-select:none}.radio-btn input{display:none}.radio-btn.active{border-color:#4f46e5;background:#eef2ff;color:#4f46e5}.radio-btn:hover:not(.active){border-color:#aaa}.inputs{display:flex;flex-direction:column;gap:16px}.input-row{display:flex;align-items:center;gap:0}.input{flex:1;padding:10px 14px;border:1.5px solid #e0e0e0;border-right:none;border-radius:8px 0 0 8px;font-size:1rem;outline:none;transition:border-color .15s;-webkit-appearance:textfield;-moz-appearance:textfield;appearance:textfield}.input:focus{border-color:#4f46e5}.unit{padding:10px 14px;border:1.5px solid #e0e0e0;border-radius:0 8px 8px 0;background:#f7f7f9;font-size:.9rem;color:#555;white-space:nowrap}.result{display:flex;align-items:baseline;gap:10px;padding:16px 18px;border-radius:10px;background:#f0f2f5;border:1.5px solid #e0e0e0;transition:all .2s}.result--visible{background:#eef2ff;border-color:#4f46e5}.result-label{font-size:.85rem;font-weight:600;color:#888;flex:1}.result-value{font-size:1.6rem;font-weight:700;color:#4f46e5;font-variant-numeric:tabular-nums}.result-unit{font-size:1rem;color:#4f46e5;font-weight:500}.field-group{display:flex;flex-direction:column}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:#f0f2f5;color:#1a1a2e;min-height:100vh;display:flex;align-items:center;justify-content:center}