*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;min-width:320px;font-family:Pretendard,Apple SD Gothic Neo,sans-serif;background:#f5f6f8;color:#1c1e21;overflow-wrap:anywhere}button,select,input{font:inherit;touch-action:manipulation}.app-header{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:calc(12px + env(safe-area-inset-top)) max(24px,env(safe-area-inset-right)) 12px max(24px,env(safe-area-inset-left));background:#1d3557;color:#fff}.app-header h1{font-size:18px;margin:0;cursor:pointer}.app-header nav{display:flex;gap:4px}.app-header nav button{min-height:44px;padding:0 12px;background:none;border:none;color:#cfd8e3;cursor:pointer;font-size:14px}.app-header nav button:hover{color:#fff}.page{max-width:760px;margin:24px auto;padding:0 16px;display:flex;flex-direction:column;gap:16px}.card{background:#fff;border-radius:10px;padding:16px 20px;box-shadow:0 1px 3px #00000014}.card h2{font-size:16px;margin:0 0 12px}.stat-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.stat{flex:1;text-align:center;border:1px solid #e3e6ea;border-radius:8px;padding:10px}.stat strong{display:block;font-size:22px}.muted{color:#7a828c;font-size:13px}.error{color:#c0392b;font-size:14px}.banner.warn{background:#fdf3d7;border:1px solid #e9c46a;border-radius:8px;padding:10px 14px;font-size:14px}.form-row{display:flex;flex-wrap:wrap;gap:10px;align-items:center}.form-row select,.form-row button{min-height:44px;padding:8px 12px;border-radius:8px;border:1px solid #cfd4da;font-size:16px}.form-row label{min-height:44px;display:inline-flex;align-items:center;gap:6px}.form-row input[type=radio]{width:20px;height:20px}.form-row button{background:#1d3557;color:#fff;border:none;cursor:pointer}.form-row button:disabled{opacity:.5;cursor:not-allowed}.link{background:none;border:none;color:#1d6fd9;cursor:pointer;padding:8px 0;font-size:14px}.choice{display:block;width:100%;min-height:52px;text-align:left;margin:8px 0;padding:12px 14px;border:1px solid #cfd4da;border-radius:10px;background:#fff;cursor:pointer;font-size:16px;line-height:1.5}.choice:hover{border-color:#1d3557}.review-item{border:1px solid #e3e6ea;border-radius:8px;padding:12px 14px;margin:8px 0}.review-item.wrong{border-color:#e07a72;background:#fdf4f3}.review-item.correct{border-color:#7fc8a1}.explanation{border-left:3px solid #9aa3ad;padding:4px 10px;margin:8px 0;font-size:14px;white-space:pre-wrap}.explanation.gemini{border-left-color:#2a9d8f}.small-btn{min-height:44px;font-size:14px;padding:8px 12px;border-radius:8px;border:1px solid #cfd4da;background:#fff;cursor:pointer;margin:4px 8px 4px 0}.progress{color:#7a828c;font-size:13px;margin-bottom:8px}.login-page{min-height:100dvh;display:grid;place-items:center;padding:max(24px,env(safe-area-inset-top)) max(16px,env(safe-area-inset-right)) max(24px,env(safe-area-inset-bottom)) max(16px,env(safe-area-inset-left))}.login-card{width:min(100%,400px);display:flex;flex-direction:column;gap:12px;padding:28px;border-radius:14px;background:#fff;box-shadow:0 4px 20px #0000001a}.login-card h1,.login-card p{margin:0}.login-card label{font-size:14px;font-weight:600}.login-card input,.login-card button{min-height:48px;border-radius:8px;font-size:16px}.login-card input{border:1px solid #cfd4da;padding:10px 12px}.login-card button{border:0;background:#1d3557;color:#fff;cursor:pointer}.login-badge{color:#1d3557;font-weight:700}@media(max-width:600px){.app-header{padding-left:max(12px,env(safe-area-inset-left));padding-right:max(8px,env(safe-area-inset-right))}.app-header h1{font-size:16px;white-space:nowrap}.app-header nav button{padding:0 8px}.page{width:100%;margin:12px auto;padding:0 max(10px,env(safe-area-inset-left)) calc(24px + env(safe-area-inset-bottom)) max(10px,env(safe-area-inset-right));gap:12px}.card{border-radius:10px;padding:16px 14px}.stat-row{grid-template-columns:1fr;gap:8px}.stat{display:grid;grid-template-columns:1fr auto auto;align-items:center;gap:10px;text-align:left}.stat strong{font-size:19px}.form-row{align-items:stretch}.form-row select,.form-row>button{width:100%}.form-row label{flex:1 1 calc(50% - 5px);justify-content:center;border:1px solid #e3e6ea;border-radius:8px;padding:6px}.review-item{padding:12px}.review-item ol{padding-left:24px}.review-item li{margin-bottom:8px;line-height:1.45}.explanation{margin:12px 0;line-height:1.55}.choice:hover{border-color:#cfd4da}.choice:active{border-color:#1d3557;background:#f2f6fb}}
