:root{--bg: #f5f6f8;--card: #ffffff;--text: #1c2430;--muted: #6b7280;--border: #d7dbe0;--accent: #2f6fed;--accent-text: #ffffff;color-scheme:light}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;font-size:16px;line-height:1.4}.wrap{max-width:640px;margin:0 auto;padding:20px 16px calc(56px + env(safe-area-inset-bottom))}.survey-header{display:flex;align-items:center;gap:12px;margin:8px 0}.survey-logo{flex:0 0 auto;width:96px;height:96px;border-radius:12px}.survey-progress{position:fixed;left:0;right:0;bottom:0;z-index:10;background:var(--card);border-top:1px solid var(--border);padding:5px 0 calc(5px + env(safe-area-inset-bottom))}.survey-progress-inner{max-width:640px;margin:0 auto;padding:0 16px;display:flex;align-items:center;gap:12px}.survey-progress-bar{flex:1 1 auto;height:6px;border-radius:3px;background:var(--border);overflow:hidden}.survey-progress-fill{height:100%;background:var(--accent);border-radius:3px;transition:width .2s ease}.survey-progress-text{flex:0 0 auto;color:var(--muted);font-size:12px;white-space:nowrap}.survey-header-text{min-width:0}.survey-header-title{font-size:18px;font-weight:600;line-height:1.25}.survey-header-sub{color:var(--muted);font-size:13px;line-height:1.35;margin-top:2px}.q{background:var(--card);border:1px solid var(--border);border-radius:10px;padding:14px 14px 16px;margin-bottom:14px}.q-text{display:block;font-weight:500;margin-bottom:10px}.q-no{color:var(--muted);margin-right:4px}.q-input{width:100%;padding:11px 12px;font-size:16px;border:1px solid var(--border);border-radius:8px;background:#fff;color:var(--text)}.q-input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px #2f6fed2e}.q-options{display:flex;flex-direction:column;gap:8px}.q-option{display:flex;align-items:center;gap:10px;padding:10px 12px;border:1px solid var(--border);border-radius:8px;cursor:pointer}.q-option input{width:18px;height:18px;margin:0;accent-color:var(--accent);flex:0 0 auto}.q-option:has(input:checked){border-color:var(--accent);background:#2f6fed0f}.q-hint{margin:8px 0 0;color:var(--muted);font-size:13px;text-align:center}.submit{width:100%;margin-top:8px;padding:14px;font-size:16px;font-weight:600;color:var(--accent-text);background:var(--accent);border:none;border-radius:10px;cursor:pointer}.submit:disabled{opacity:.6;cursor:default}.err{color:#c0341d;font-size:14px}.centered{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:24px;color:var(--muted)}.centered h1{color:var(--text);font-size:22px;margin:0 0 6px}.hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}