:root{--sky: #0ea5e9;--teal: #00d4aa;--sky-dark: #0284c7;--teal-dark: #00b894;--bg: #f8fafc;--surface: #ffffff;--text: #0f172a;--text-muted: #64748b;--border: #e2e8f0;--error: #dc2626;--radius: 12px;--shadow: 0 4px 6px -1px rgb(0 0 0 / .06), 0 2px 4px -2px rgb(0 0 0 / .04);--font: "DM Sans", system-ui, -apple-system, sans-serif}*,*:before,*:after{box-sizing:border-box}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{margin:0;min-height:100vh;font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.5}#root{min-height:100vh}.page{min-height:100vh;padding:1.5rem}.page--center{display:flex;align-items:center;justify-content:center}.app-loading{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1rem;color:var(--text-muted)}.spinner{width:40px;height:40px;border:3px solid var(--border);border-top-color:var(--sky);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.auth-page{background:linear-gradient(160deg,var(--bg) 0%,#e0f2fe 100%)}.auth-card{width:100%;max-width:400px;padding:2rem;background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--border)}.brand-title{margin:0 0 .25rem;font-size:2rem;font-weight:700;letter-spacing:-.02em}.brand-title__air{color:var(--sky)}.brand-title__ai{color:var(--teal)}.brand-title--small{font-size:1.25rem}.tagline,.auth-subtitle{margin:0 0 1.5rem;color:var(--text-muted);font-size:.95rem}.auth-form{display:flex;flex-direction:column;gap:1.25rem}.auth-label{display:flex;flex-direction:column;gap:.35rem;font-size:.875rem;font-weight:500;color:var(--text)}.auth-input{padding:.65rem .85rem;font-size:1rem;font-family:inherit;color:var(--text);background:var(--bg);border:1px solid var(--border);border-radius:8px;transition:border-color .2s,box-shadow .2s}.auth-input::placeholder{color:var(--text-muted)}.auth-input:focus{outline:none;border-color:var(--sky);box-shadow:0 0 0 3px #0ea5e926}.auth-error{padding:.65rem .85rem;font-size:.875rem;color:var(--error);background:#fef2f2;border-radius:8px;border:1px solid #fecaca}.auth-actions{display:flex;flex-wrap:wrap;gap:.75rem;margin-top:.5rem}.auth-footer{margin:1.5rem 0 0;font-size:.875rem;color:var(--text-muted);text-align:center}.auth-link{color:var(--sky);font-weight:500;text-decoration:none}.auth-link:hover{color:var(--sky-dark);text-decoration:underline}.btn{display:inline-flex;align-items:center;justify-content:center;padding:.65rem 1.25rem;font-size:.9375rem;font-weight:500;font-family:inherit;border-radius:8px;border:none;cursor:pointer;transition:background-color .2s,color .2s,border-color .2s;text-decoration:none}.btn:disabled{opacity:.7;cursor:not-allowed}.btn--primary{color:#fff;background:linear-gradient(135deg,var(--sky) 0%,var(--teal) 100%)}.btn--primary:hover:not(:disabled){background:linear-gradient(135deg,var(--sky-dark) 0%,var(--teal-dark) 100%)}.btn--secondary{color:var(--sky);background:var(--surface);border:1px solid var(--sky)}.btn--secondary:hover:not(:disabled){background:#f0f9ff}.btn--ghost{color:var(--text-muted);background:transparent}.btn--ghost:hover:not(:disabled){color:var(--text);background:var(--bg)}.btn--full{width:100%}.dashboard-page{padding:0}.dashboard-header{display:flex;align-items:center;justify-content:space-between;padding:1rem 1.5rem;background:var(--surface);border-bottom:1px solid var(--border);box-shadow:var(--shadow)}.dashboard-main{max-width:640px;margin:0 auto;padding:2rem 1.5rem}.dashboard-header-right{display:flex;align-items:center;gap:1rem}.credits-badge{font-size:.875rem;font-weight:600;color:var(--teal);background:#00d4aa1f;padding:.35rem .75rem;border-radius:8px}.dashboard-card--info{margin-bottom:1.5rem}.dashboard-card--info .dashboard-info{margin-bottom:0}.polish-card{margin-bottom:2rem}.polish-subtitle{margin:0 0 1.5rem;font-size:.9375rem;color:var(--text-muted)}.polish-label{display:flex;flex-direction:column;gap:.5rem;font-size:.875rem;font-weight:500;color:var(--text);margin-bottom:1.25rem}.polish-textarea{width:100%;padding:1rem;font-size:1rem;font-family:inherit;line-height:1.6;color:var(--text);background:var(--bg);border:1px solid var(--border);border-radius:8px;resize:vertical;min-height:140px;transition:border-color .2s,box-shadow .2s}.polish-textarea::placeholder{color:var(--text-muted)}.polish-textarea:focus{outline:none;border-color:var(--sky);box-shadow:0 0 0 3px #0ea5e926}.polish-textarea:disabled{opacity:.7;cursor:not-allowed}.polish-modes{margin-bottom:1.25rem}.polish-modes-label{display:block;font-size:.875rem;font-weight:500;color:var(--text);margin-bottom:.5rem}.polish-modes-grid{display:flex;flex-wrap:wrap;gap:.5rem}.polish-mode-btn{padding:.5rem 1rem;font-size:.875rem;font-weight:500;font-family:inherit;color:var(--sky);background:var(--surface);border:1px solid var(--border);border-radius:8px;cursor:pointer;transition:all .2s}.polish-mode-btn:hover:not(:disabled){border-color:var(--sky);background:#f0f9ff;color:var(--sky-dark)}.polish-mode-btn--active{color:#fff;background:linear-gradient(135deg,var(--sky) 0%,var(--teal) 100%);border-color:transparent}.polish-mode-btn:disabled{opacity:.6;cursor:not-allowed}.polish-no-credits{padding:1rem;font-size:.9375rem;color:#b45309;background:#fffbeb;border:1px solid #fde68a;border-radius:8px;margin-bottom:1rem}.polish-error{margin-bottom:1rem}.polish-loading{display:flex;align-items:center;gap:.75rem;padding:1rem 0;color:var(--text-muted);font-size:.9375rem}.spinner--sm{width:24px;height:24px;border-width:2px}.polish-result{margin-top:1.5rem;padding-top:1.5rem;border-top:1px solid var(--border)}.polish-result-header{display:flex;align-items:center;justify-content:space-between;gap:1rem;margin-bottom:.75rem}.polish-result-header h3{margin:0;font-size:1rem;font-weight:600;color:var(--text)}.btn--sm{padding:.4rem .85rem;font-size:.8125rem}.polish-result-content{padding:1rem;font-size:.9375rem;line-height:1.65;color:var(--text);background:var(--bg);border:1px solid var(--border);border-radius:8px;white-space:pre-wrap;word-break:break-word}.dashboard-card{padding:2rem;background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--border)}.dashboard-card h2{margin:0 0 1.5rem;font-size:1.25rem;font-weight:600;color:var(--text)}.dashboard-info{display:flex;flex-direction:column;gap:1rem;margin-bottom:1.5rem}.info-row{display:flex;flex-direction:column;gap:.25rem}.info-label{font-size:.75rem;font-weight:500;text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted)}.info-value{font-size:1rem;color:var(--text)}.info-value--credits{font-size:1.5rem;font-weight:700;color:var(--teal)}.dashboard-hint{margin:0;font-size:.875rem;color:var(--text-muted)}