:root{--bg:#f4f6f8;--panel:#fff;--text:#1d2733;--muted:#687482;--line:#dfe5eb;--primary:#0a7f6f;--primary-dark:#08675b;--danger:#b42318;--shadow:0 8px 24px rgba(18,38,63,.08);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP",sans-serif}*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:var(--bg);color:var(--text)}button,input,select,textarea{font:inherit}button{cursor:pointer}.app-shell{width:min(760px,100%);margin:auto;min-height:100vh}.app-header{display:flex;align-items:center;justify-content:space-between;padding:22px 18px 12px}.app-header h1{margin:2px 0 0;font-size:1.35rem}.eyebrow{margin:0;color:var(--primary);font-weight:800;font-size:.74rem;letter-spacing:.12em}main{padding:0 14px 28px}.panel{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:20px;margin:12px 0;box-shadow:var(--shadow)}.center-panel{text-align:center;padding:44px 22px}.panel h2{margin:0 0 8px;font-size:1.25rem}.lead{margin:0 0 20px;color:var(--muted);line-height:1.65}.muted,.help{color:var(--muted)}.help{font-size:.82rem;margin:6px 0 0}.field{margin:0 0 16px}.field-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}label{display:block;margin-bottom:7px;font-weight:700;font-size:.92rem}label span{color:var(--danger);font-size:.78rem}input,select,textarea{width:100%;border:1px solid #cbd4dc;border-radius:10px;background:#fff;padding:12px 13px;color:var(--text);outline:none}input:focus,select:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(10,127,111,.12)}textarea{resize:vertical}.primary-button,.secondary-button{width:100%;border-radius:11px;padding:13px 16px;font-weight:800}.primary-button{border:1px solid var(--primary);background:var(--primary);color:#fff}.primary-button:hover{background:var(--primary-dark)}.primary-button:disabled,.secondary-button:disabled{opacity:.55}.secondary-button{border:1px solid #aab6c1;background:#fff;color:var(--text);margin-top:10px}.compact{width:auto;margin:0;padding:9px 12px;font-size:.88rem}.text-button{border:0;background:transparent;color:var(--primary);padding:6px;font-weight:800}.danger{color:var(--danger)}.customer-card,.section-heading,.product-card-header{display:flex;align-items:flex-start;justify-content:space-between;gap:14px}.product-list{display:grid;gap:14px}.product-card{border:1px solid var(--line);border-radius:14px;padding:16px;background:#fbfcfd}.product-card h3{margin:0 0 14px;font-size:1rem}.top-space{margin-top:22px}.history-list{display:grid;gap:12px}.history-card{border:1px solid var(--line);border-radius:13px;padding:15px}.history-card h3{margin:0;font-size:1rem}.history-meta{display:flex;justify-content:space-between;gap:12px;color:var(--muted);font-size:.86rem;margin:7px 0 10px}.history-products{margin:0;padding-left:1.2rem;line-height:1.6}.history-note{border-top:1px solid var(--line);padding-top:10px;margin-top:10px;color:var(--muted)}.empty-state{padding:30px 12px;text-align:center;color:var(--muted)}.error{color:var(--danger)}.spinner{width:38px;height:38px;border:4px solid #d9e4e2;border-top-color:var(--primary);border-radius:50%;margin:0 auto 18px;animation:spin .8s linear infinite}.success-mark{width:58px;height:58px;border-radius:50%;display:grid;place-items:center;background:#e0f4ef;color:var(--primary);font-size:2rem;font-weight:900;margin:0 auto 18px}.hidden{display:none!important}footer{text-align:center;color:var(--muted);font-size:.8rem;padding:0 16px 24px}@keyframes spin{to{transform:rotate(360deg)}}@media(max-width:560px){.field-grid{grid-template-columns:1fr;gap:0}.customer-card,.section-heading{display:block}.customer-card .compact,.section-heading .compact{margin-top:12px}.panel{padding:17px}}