:root{--bg: #f7f7f9;--surface: #ffffff;--border: #e5e7eb;--text: #1f2937;--muted: #6b7280;--accent: #1b3a5c;--accent-hover: #112847;--success: #047857;--error: #b91c1c;--warn: #b45309;--radius: 8px;--font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif}*{box-sizing:border-box}html,body{margin:0;padding:0}body{font-family:var(--font);background:var(--bg);color:var(--text);font-size:14px;line-height:1.5}.app-shell{max-width:880px;margin:0 auto;padding:24px 16px 64px}.app-header{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:16px;flex-wrap:wrap;gap:8px}.app-title{font-size:22px;margin:0;color:var(--accent)}.app-subtitle{color:var(--muted);font-size:13px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-bottom:16px}.card h2{font-size:15px;margin:0 0 12px;color:var(--accent)}.usage-bar{font-size:13px;color:var(--muted);margin-bottom:12px;padding:8px 0}.usage-bar strong{color:var(--text)}.tab-bar{display:flex;gap:4px;margin-bottom:12px;border-bottom:1px solid var(--border)}.tab-bar button{-webkit-appearance:none;-moz-appearance:none;appearance:none;background:none;border:none;padding:8px 16px;font-size:14px;cursor:pointer;color:var(--muted);border-bottom:2px solid transparent;margin-bottom:-1px}.tab-bar button.active{color:var(--accent);border-bottom-color:var(--accent);font-weight:600}.upload-zone{border:2px dashed var(--border);border-radius:var(--radius);padding:28px;text-align:center;color:var(--muted);cursor:pointer;transition:border-color .12s}.upload-zone:hover{border-color:var(--accent)}.upload-zone.is-active{border-color:var(--accent);background:#f0f4f9}.upload-zone input{display:none}.url-input{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:var(--radius);font:inherit;color:var(--text)}.cost-line{margin-top:12px;padding:10px 12px;background:#f3f4f6;border-radius:var(--radius);display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px}.cost-line .cost{font-weight:600;color:var(--accent)}.cost-line.affordable{background:#ecfdf5}.cost-line.unaffordable{background:#fef2f2;color:var(--error)}.btn{-webkit-appearance:none;-moz-appearance:none;appearance:none;background:var(--accent);color:#fff;border:none;border-radius:var(--radius);padding:10px 20px;font:inherit;font-weight:600;cursor:pointer;transition:background-color .12s}.btn:hover:not(:disabled){background:var(--accent-hover)}.btn:disabled{background:#9ca3af;cursor:not-allowed}.btn.full{width:100%}.btn.secondary{background:#fff;color:var(--accent);border:1px solid var(--accent)}.field-block{display:flex;flex-direction:column;gap:8px;margin-bottom:12px}.field-block label{font-size:13px;color:var(--muted)}.field-help{font-size:12px;color:var(--muted)}.alert{padding:10px 12px;border-radius:var(--radius);font-size:13px;margin:8px 0}.alert.error{background:#fef2f2;color:var(--error);border:1px solid #fecaca}.alert.warn{background:#fffbeb;color:var(--warn);border:1px solid #fde68a}.alert.success{background:#ecfdf5;color:var(--success);border:1px solid #a7f3d0}.job-stage{display:flex;align-items:center;gap:12px;padding:12px;background:#eff6ff;border-radius:var(--radius);margin:12px 0}.spinner{width:14px;height:14px;border-radius:50%;border:2px solid #93c5fd;border-top-color:var(--accent);animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.download-row{display:flex;gap:12px;margin-top:12px;flex-wrap:wrap}.download-row .btn{flex:1}.guide-card{padding:0}.guide-toggle{display:flex;align-items:center;justify-content:space-between;width:100%;padding:16px 20px;background:none;border:none;font:inherit;font-size:15px;font-weight:600;color:var(--accent);cursor:pointer}.guide-toggle:hover{background:#f9fafb}.guide-chevron,.faq-chevron{font-size:10px;transition:transform .2s;color:var(--muted)}.guide-chevron.open,.faq-chevron.open{transform:rotate(180deg)}.guide-body{padding:0 20px 20px}.guide-intro{color:var(--muted);font-size:14px;margin:0 0 20px;line-height:1.6}.guide-steps{display:flex;flex-direction:column;gap:16px;margin-bottom:24px}.guide-step{display:flex;gap:16px;align-items:flex-start}.step-number{flex-shrink:0;width:32px;height:32px;border-radius:50%;background:var(--accent);color:#fff;font-weight:700;font-size:15px;display:flex;align-items:center;justify-content:center;margin-top:2px}.guide-step h3{margin:0 0 4px;font-size:14px;color:var(--text)}.guide-step p{margin:0;font-size:13px;color:var(--muted);line-height:1.6}.guide-platforms{background:#eff6ff;border-radius:var(--radius);padding:16px;margin-bottom:24px}.guide-platforms h3{margin:0 0 8px;font-size:14px;color:var(--accent)}.guide-platforms p{margin:0;font-size:13px;color:var(--text);line-height:1.6;white-space:pre-line}.guide-faq h3{margin:0 0 12px;font-size:14px;color:var(--accent)}.faq-item{border-bottom:1px solid var(--border)}.faq-item:last-child{border-bottom:none}.faq-question{display:flex;align-items:center;justify-content:space-between;width:100%;padding:12px 0;background:none;border:none;font:inherit;font-size:13px;font-weight:500;color:var(--text);cursor:pointer;text-align:left}.faq-question:hover,.faq-question.open{color:var(--accent)}.faq-answer{padding:0 0 12px;font-size:13px;color:var(--muted);line-height:1.6;white-space:pre-line}.gate-shell{max-width:360px;margin:96px auto 0;padding:0 16px}.gate-shell .card{padding:28px}.gate-shell h1{margin:0 0 8px;color:var(--accent);font-size:22px}.gate-shell p{color:var(--muted);margin-top:0}