:root{--primary-color: #007bff;--primary-hover-color: #0056b3;--success-color: #28a745;--error-color: #dc3545;--background-color: #f8f9fa;--container-background: #ffffff;--text-color: #333;--label-color: #555;--border-color: #ced4da;--border-focus-color: #80bdff;--font-family: "Nunito", sans-serif;--button-hover-bg: rgba(0, 0, 0, .05);color-scheme:light}:root[data-theme=dark]{--primary-color: #0d8eff;--primary-hover-color: #007bff;--background-color: #0f172a;--container-background: #1e293b;--text-color: #e0e0e0;--label-color: #b0b0b0;--border-color: #334155;--border-focus-color: #0d8eff;--button-hover-bg: rgba(255, 255, 255, .1);color-scheme:dark}*,*:before,*:after{box-sizing:border-box}html{background-color:var(--background-color);transition:background-color .2s}body{margin:0;font-family:var(--font-family);color:var(--text-color);display:flex;justify-content:center;align-items:flex-start;min-height:100vh;padding:2rem;transition:color .2s}#app{width:100%;max-width:600px;background-color:var(--container-background);padding:2.5rem;border-radius:12px;box-shadow:0 4px 20px #00000014;position:relative;transition:background-color .2s,filter .3s ease-in-out}#app.blurred{filter:blur(5px);pointer-events:none;-webkit-user-select:none;user-select:none}#login-overlay{position:fixed;top:0;left:0;width:100vw;height:100vh;background-color:#0009;display:flex;justify-content:center;align-items:center;z-index:1000;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}.login-modal{background-color:var(--container-background);padding:2.5rem;border-radius:12px;box-shadow:0 4px 20px #0003;width:90%;max-width:400px;text-align:center}.login-modal h2{margin-top:0;margin-bottom:.5rem;color:var(--primary-color)}.login-modal p{margin-bottom:1.5rem;color:var(--label-color)}.login-modal #login-form{display:flex;flex-direction:column;gap:1rem}.login-modal input{width:100%;padding:.75rem 1rem;border:1px solid var(--border-color);border-radius:8px;font-size:1rem;font-family:var(--font-family);transition:border-color .2s,box-shadow .2s;background-color:var(--container-background);color:var(--text-color)}.login-modal input:focus{outline:none;border-color:var(--border-focus-color);box-shadow:0 0 0 .2rem #007bff40}.login-modal .error-message{color:var(--error-color);font-size:.875rem;margin:-.5rem 0 .5rem;display:none}.login-modal .button{margin-top:.5rem}.app-header{display:flex;flex-direction:column;margin-bottom:2rem;gap:.5rem}.header-controls{display:flex;align-items:center;gap:1rem;order:1;align-self:flex-end}.user-email{color:var(--label-color);font-size:.9rem;font-weight:600;max-width:150px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}h1{color:var(--primary-color);margin-top:0;font-weight:700;text-align:center;margin-bottom:0;order:2}#theme-toggle{position:relative;top:auto;right:auto;background:transparent;border:1px solid var(--border-color);width:40px;height:40px;border-radius:50%;cursor:pointer;display:flex;justify-content:center;align-items:center;transition:background-color .2s,border-color .2s,transform .1s;color:var(--text-color);flex-shrink:0}#theme-toggle:hover{background-color:var(--button-hover-bg)}#theme-toggle:active{transform:scale(.95)}form{display:flex;flex-direction:column;gap:1.75rem}fieldset{border:none;padding:0;margin:0;display:flex;flex-direction:column;gap:1rem}legend{font-size:1.2rem;font-weight:600;color:var(--label-color);margin-bottom:.5rem;padding:0}.radio-group{display:grid;grid-auto-flow:column;grid-auto-columns:1fr;gap:1rem}.radio-group label{text-align:center;padding:.75rem 1rem;border:1px solid var(--border-color);border-radius:8px;cursor:pointer;transition:all .2s ease-in-out;background-color:transparent;min-height:4.5rem;display:flex;align-items:center;justify-content:center;line-height:1.3}.radio-group input[type=radio]{display:none}.radio-group input[type=radio]:checked+label{background-color:var(--primary-color);color:#fff;border-color:var(--primary-color);font-weight:600;box-shadow:0 2px 8px #007bff4d}.form-group{display:flex;flex-direction:column;gap:.5rem}.form-group label{font-weight:600;color:var(--label-color)}.label-with-checkbox{display:flex;justify-content:space-between;align-items:center;width:100%}.gemini-option-toggle{accent-color:var(--primary-color);width:1.2em;height:1.2em;cursor:pointer;flex-shrink:0}.required-asterisk{color:var(--error-color);font-weight:700;margin-left:4px}.form-group input[type=text],.form-group textarea,.form-group select,.form-group input[type=number]{width:100%;padding:.75rem 1rem;border:1px solid var(--border-color);border-radius:8px;font-size:1rem;font-family:var(--font-family);transition:border-color .2s,box-shadow .2s,background-color .2s,opacity .2s;background-color:var(--container-background);color:var(--text-color)}.form-group input:disabled,.form-group textarea:disabled,.form-group select:disabled{background-color:var(--background-color);opacity:.6;cursor:not-allowed;box-shadow:none;border-color:var(--border-color)}.form-group input[type=text]::placeholder,.form-group textarea::placeholder{color:#888}.form-group input[type=text]:focus,.form-group textarea:focus,.form-group select:focus,.form-group input[type=number]:focus{outline:none;border-color:var(--border-focus-color);box-shadow:0 0 0 .2rem #007bff40}.form-group textarea{min-height:80px;resize:vertical}.form-group small{color:#6c757d;font-size:.875rem}#advanced-reader-group,#gemini-storybook-group{display:flex;flex-direction:column;gap:1rem}.form-group-split{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.button-group{display:flex;flex-direction:column;gap:1rem;margin-top:1rem}.button{display:block;width:100%;text-align:center;text-decoration:none;padding:1rem;font-size:1.1rem;font-weight:700;font-family:var(--font-family);border-radius:8px;cursor:pointer;transition:background-color .2s,transform .1s,color .2s,border-color .2s}.button:hover:not(:disabled){transform:translateY(-2px)}.button:active:not(:disabled){transform:translateY(0)}.button-primary{background-color:var(--primary-color);color:#fff;border:2px solid var(--primary-color)}.button-primary:hover:not(:disabled){background-color:var(--primary-hover-color);border-color:var(--primary-hover-color)}.button-primary.copied{background-color:var(--success-color);border-color:var(--success-color);cursor:default}.button-secondary{background-color:transparent;color:var(--primary-color);border:2px solid var(--primary-color)}.button-secondary:hover{background-color:var(--primary-color);color:#fff}.hidden{display:none!important}.error-container{text-align:center}.error-container h2{color:#dc3545;margin:1.5rem 0}.error-container p{color:var(--label-color);line-height:1.6}.section-divider{border:none;border-top:1px solid var(--border-color);margin:1rem 0 .5rem}.select-all-group{display:flex;justify-content:flex-end;gap:1rem;margin-bottom:.5rem}.link-button{background:none;border:none;color:var(--primary-color);cursor:pointer;text-decoration:underline;padding:0;font-size:.9rem;font-family:var(--font-family)}.link-button:hover{color:var(--primary-hover-color)}@media(max-width:600px){.radio-group{grid-auto-flow:row;grid-auto-columns:1fr}#book-type-group{grid-template-columns:1fr 1fr}.form-group-split{grid-template-columns:1fr}}