:root{color-scheme:light;--bg: #f5f6f8;--surface: #ffffff;--surface-muted: #f1f5f9;--line: #e2e8f0;--text: #0f172a;--text-muted: #64748b;--accent: #10b981;--accent-strong: #059669;--shadow: 0 18px 40px rgba(15, 23, 42, .08);--shadow-soft: 0 10px 30px rgba(15, 23, 42, .06);--radius: 16px}*,*:before,*:after{box-sizing:border-box}body{margin:0;font-family:Noto Sans Thai,Leelawadee UI,Segoe UI,Tahoma,sans-serif;color:var(--text);background:var(--bg)}.page{min-height:100vh;background:linear-gradient(180deg,#f5f6f8,#edf2f7)}.header{display:flex;align-items:center;justify-content:space-between;padding:24px 32px}.brand{display:flex;align-items:center;gap:12px}.brand-logo{width:44px;height:44px;border-radius:14px;border:1px solid var(--line);box-shadow:var(--shadow-soft)}.brand-title{font-size:18px;font-weight:600}.brand-subtitle{font-size:12px;color:var(--text-muted)}.header-actions{display:flex;align-items:center;gap:12px}.pill{border:1px solid var(--line);padding:6px 12px;border-radius:999px;font-size:12px;color:var(--text-muted);background:var(--surface)}.icon-btn{width:36px;height:36px;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--text-muted)}.layout{display:grid;gap:24px;grid-template-columns:320px 1fr 240px;padding:0 32px 48px}.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px}.panel-title{font-size:12px;letter-spacing:.24em;text-transform:uppercase;color:var(--text-muted)}.panel-section{display:flex;flex-direction:column;gap:16px}.hidden{display:none!important}.upload-zone{border-radius:18px;border:1.5px dashed #cbd5f5;padding:24px;text-align:center;background:var(--surface-muted);transition:border-color .2s ease,background .2s ease}.is-disabled{opacity:.6}.upload-zone.is-dragging{border-color:var(--accent);background:#ecfdf5}.upload-thumb{margin-top:8px;max-height:160px;border-radius:12px;border:1px solid var(--line);object-fit:contain}.prompt-input{padding:10px 12px;border-radius:12px;border:1px solid var(--line);font-size:14px;resize:vertical;min-height:72px;background:#fff}.mask-stage{position:relative;margin-top:8px}.mask-canvas{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;border-radius:12px;cursor:crosshair}.mask-hint{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:600;color:#0f172a;background:#ecfdf5d9;border-radius:12px;border:1px dashed rgba(16,185,129,.4)}.field{display:flex;flex-direction:column;gap:8px}.field-label{font-size:12px;font-weight:600;color:var(--text)}.select{padding:10px 12px;border-radius:12px;border:1px solid var(--line);background:#fff;font-size:14px}.ratio-grid{display:grid;gap:8px}.ratio-button{padding:12px;border-radius:12px;border:1px solid var(--line);background:var(--surface);text-align:left;font-size:14px;transition:border-color .2s ease,box-shadow .2s ease}.ratio-button.is-active{border-color:var(--accent);box-shadow:0 0 0 2px #10b98126}.btn{padding:12px 14px;border-radius:12px;border:none;font-size:14px;font-weight:600;cursor:pointer}.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent-strong));color:#fff;box-shadow:0 12px 20px #10b98133}.btn-secondary{border:1px solid var(--line);background:#fff;color:var(--text)}.btn:disabled,button:disabled{opacity:.5;cursor:not-allowed}select:disabled,input:disabled{opacity:.6;cursor:not-allowed;background:#f1f5f9}.preview-card{background:linear-gradient(135deg,#fff,#f8fafc);border-radius:20px;padding:20px;border:1px solid var(--line);box-shadow:var(--shadow-soft)}.progress-bar{height:8px;border-radius:999px;background:#e2e8f0;overflow:hidden}.progress-fill{height:100%;width:0%;background:linear-gradient(90deg,#34d399,#22c55e,#10b981);background-size:200% 100%;animation:shimmer 2s linear infinite;transition:width .2s ease}.result-frame{border-radius:18px;border:1px solid var(--line);overflow:hidden;background:#f8fafc}.result-image{width:100%;object-fit:contain}.error-box{border-radius:16px;border:1px solid #fecaca;background:#fef2f2;color:#b91c1c;padding:16px;font-size:14px}.muted{color:var(--text-muted);font-size:12px}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f172a99;display:none;align-items:center;justify-content:center;padding:24px;z-index:50}.modal{width:min(900px,100%);max-height:90vh;overflow-y:auto;background:#fff;border-radius:24px;border:1px solid var(--line);box-shadow:var(--shadow);padding:24px}.modal-grid{display:grid;gap:16px;grid-template-columns:1.2fr 1fr;margin-top:16px}.card{border:1px solid var(--line);border-radius:16px;padding:16px;background:var(--surface)}@media (max-width: 768px){.modal-grid{grid-template-columns:1fr}}.modal-open{display:flex}@keyframes shimmer{0%{background-position:0% 50%}to{background-position:200% 50%}}@media (max-width: 1024px){.layout{grid-template-columns:1fr}.header{padding:20px}}