:root{--bg-primary: #f9fafb;--bg-secondary: #ffffff;--bg-tertiary: #f3f4f6;--text-primary: #111827;--text-secondary: #4b5563;--text-tertiary: #9ca3af;--accent: #2563eb;--accent-hover: #1d4ed8;--accent-light: #dbeafe;--accent-lighter: #eff6ff;--border: #e5e7eb;--border-strong: #d1d5db;--success: #059669;--success-light: #d1fae5;--error: #dc2626;--error-light: #fee2e2;--error-text: #991b1b;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .07), 0 2px 4px -2px rgba(0, 0, 0, .05);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .08), 0 4px 6px -4px rgba(0, 0, 0, .05)}.dark{--bg-primary: #0d1117;--bg-secondary: #161b22;--bg-tertiary: #1c2128;--text-primary: #e6edf3;--text-secondary: #8b949e;--text-tertiary: #6e7681;--accent: #58a6ff;--accent-hover: #79b8ff;--accent-light: #1a3a5c;--accent-lighter: #0d2240;--border: #30363d;--border-strong: #484f58;--success: #3fb950;--success-light: #0d2818;--error: #f85149;--error-light: #3d1214;--error-text: #f8b4b4;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .4), 0 2px 4px -2px rgba(0, 0, 0, .3);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .5), 0 4px 6px -4px rgba(0, 0, 0, .4)}*,*:before,*:after{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background-color:var(--bg-primary);color:var(--text-primary);min-height:100vh;line-height:1.5;-webkit-font-smoothing:antialiased}.app-header{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;border-bottom:1px solid var(--border);background-color:var(--bg-secondary)}.app-header__brand{display:flex;align-items:center;gap:10px}.app-header__logo{width:28px;height:28px;color:var(--accent)}.app-header__title{font-size:18px;font-weight:700;letter-spacing:-.02em;color:var(--text-primary)}.app-header__controls{display:flex;align-items:center;gap:8px}.main-content{max-width:640px;margin:48px auto;padding:0 24px}.hero{text-align:center;margin-bottom:48px}.hero__title{font-size:30px;font-weight:800;letter-spacing:-.03em;line-height:1.15;margin:0 0 12px;color:var(--text-primary)}.hero__subtitle{font-size:16px;color:var(--text-secondary);margin:0;line-height:1.6}.card{background-color:var(--bg-secondary);border:1px solid var(--border);border-radius:12px;padding:32px;box-shadow:var(--shadow-md)}.card+.card{margin-top:24px}.card__header{display:flex;align-items:center;gap:10px;margin-bottom:24px}.card__icon{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:8px;background-color:var(--accent-light);color:var(--accent);flex-shrink:0}.card__title{font-size:16px;font-weight:600;margin:0;color:var(--text-primary)}.form-group{margin-bottom:20px}.form-label{display:block;font-size:13px;font-weight:500;text-transform:uppercase;letter-spacing:.05em;color:var(--text-tertiary);margin-bottom:6px}.form-input{width:100%;padding:10px 14px;font-size:15px;border:1px solid var(--border-strong);border-radius:8px;background-color:var(--bg-primary);color:var(--text-primary);transition:border-color .15s ease,box-shadow .15s ease;outline:none;font-family:inherit}.form-input::placeholder{color:var(--text-tertiary)}.form-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-light)}.form-input--error{border-color:var(--error, #dc2626)}.form-input--error:focus{border-color:var(--error, #dc2626);box-shadow:0 0 0 3px var(--error-light, #fee2e2)}.form-error{display:flex;align-items:center;gap:6px;margin-top:6px;font-size:13px;font-weight:500;color:var(--error, #dc2626)}.alert-inline{display:flex;align-items:center;gap:10px;margin-top:16px;padding:12px 16px;border-radius:8px;font-size:13px}.alert-inline--error{background-color:var(--error-light, #fee2e2);color:var(--error-text, #991b1b);border:1px solid var(--error, #dc2626)}.alert-inline__icon{flex-shrink:0;font-size:16px}.alert-inline__text{flex:1;font-weight:500;line-height:1.4}.alert-inline__action{display:inline-flex;align-items:center;gap:5px;padding:5px 12px;font-family:inherit;font-size:12px;font-weight:600;border:none;border-radius:6px;background-color:var(--error, #dc2626);color:#fff;cursor:pointer;white-space:nowrap;transition:opacity .15s ease}.alert-inline__action:hover{opacity:.85}.options-group{display:flex;flex-direction:column;gap:10px;margin-bottom:24px}.option-item{display:flex;align-items:flex-start;gap:10px;cursor:pointer;font-size:14px;color:var(--text-secondary)}.option-item input[type=checkbox]{width:18px;height:18px;accent-color:var(--accent);cursor:pointer;flex-shrink:0;margin:2px 0 0}.option-item:hover{color:var(--text-primary)}.option-item__text{display:flex;flex-direction:column;gap:2px}.option-item__hint{font-size:12px;color:var(--text-tertiary);font-weight:400;line-height:1.3}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:inherit;font-size:15px;font-weight:600;padding:10px 20px;border-radius:8px;border:none;cursor:pointer;transition:background-color .15s ease,box-shadow .15s ease,transform .1s ease;line-height:1.4}.btn:active:not(:disabled){transform:translateY(1px)}.btn-primary{background-color:var(--accent);color:#fff;box-shadow:var(--shadow-sm);width:100%}.btn-primary:hover:not(:disabled){background-color:var(--accent-hover);box-shadow:var(--shadow-md)}.btn-primary:disabled{opacity:.35;cursor:not-allowed;background-color:var(--text-tertiary)}.action-row{display:flex;gap:10px}.action-row .btn-primary{flex:1}.btn-cancel{display:inline-flex;align-items:center;justify-content:center;gap:6px;font-family:inherit;font-size:14px;font-weight:600;padding:10px 16px;border-radius:8px;border:1px solid var(--border-strong);background-color:var(--bg-secondary);color:var(--text-secondary);cursor:pointer;transition:background-color .15s ease,color .15s ease;white-space:nowrap}.btn-cancel:hover{background-color:var(--error-light, #fee2e2);color:var(--error, #dc2626);border-color:var(--error, #dc2626)}.btn-ghost{background-color:transparent;color:var(--text-secondary);padding:6px 10px;font-size:13px;font-weight:500;border:1px solid var(--border);border-radius:6px}.btn-ghost:hover{background-color:var(--bg-tertiary);color:var(--text-primary)}.btn-ghost.active{background-color:var(--accent-light);color:var(--accent);border-color:var(--accent)}.toggle-group{display:inline-flex;border:1px solid var(--border);border-radius:6px;overflow:hidden}.toggle-group .toggle-btn{padding:5px 12px;font-family:inherit;font-size:12px;font-weight:500;border:none;background-color:transparent;color:var(--text-secondary);cursor:pointer;transition:background-color .15s ease,color .15s ease}.toggle-group .toggle-btn:not(:last-child){border-right:1px solid var(--border)}.toggle-group .toggle-btn:hover{background-color:var(--bg-tertiary)}.toggle-group .toggle-btn.active{background-color:var(--accent);color:#fff}.progress-section{margin-top:24px}.progress-header{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:8px}.progress-label{font-size:13px;font-weight:600;color:var(--text-secondary)}.progress-value{font-size:13px;font-weight:700;color:var(--accent);font-variant-numeric:tabular-nums}.progress-message{font-size:13px;color:var(--text-tertiary);margin-top:8px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.progress-track{width:100%;height:6px;background-color:var(--bg-tertiary);border-radius:99px;overflow:hidden}.progress-fill{height:100%;background-color:var(--accent);border-radius:99px;transition:width .3s ease}.progress-fill.complete{background-color:var(--success)}.results-card{margin-top:24px}.results-card .card__icon{background-color:var(--success-light);color:var(--success)}.download-list{display:flex;flex-direction:column;gap:10px}.download-item{display:flex;align-items:center;gap:12px;padding:12px 16px;border:1px solid var(--border);border-radius:8px;text-decoration:none;color:var(--text-primary);font-size:14px;font-weight:500;transition:background-color .15s ease,border-color .15s ease,box-shadow .15s ease}.download-item:hover{background-color:var(--accent-lighter);border-color:var(--accent);box-shadow:var(--shadow-sm)}.download-item__icon{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:6px;background-color:var(--bg-tertiary);color:var(--text-secondary);flex-shrink:0;font-size:14px}.download-item__info{flex:1;min-width:0}.download-item__label{font-size:14px;font-weight:500;color:var(--text-primary)}.download-item__filename{font-size:12px;color:var(--text-tertiary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.download-item__arrow{color:var(--text-tertiary);font-size:12px;flex-shrink:0}.spinner{display:inline-block;width:16px;height:16px;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .6s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media(max-width:640px){.app-header{padding:12px 16px}.main-content{margin:32px auto;padding:0 16px}.card{padding:24px}.hero__title{font-size:24px}.app-header__controls{gap:4px}}