/* 新增的入口頁沿用題紙的色彩、字體及按鈕，不載入一屏作答樣式。 */
.app-page{min-height:100dvh;color:var(--text)}
.app-page ::selection{background:#dce7ff;color:var(--ink)}
.app-page a{text-underline-offset:.22em}
.app-header{display:flex;align-items:center;justify-content:space-between;gap:24px;max-width:1200px;margin:auto;padding:22px 32px;border-bottom:1px solid var(--line)}
.app-header .brand{letter-spacing:0}
.app-header .brand small{color:#53657c;font-size:11px;letter-spacing:.06em}
.app-navigation{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.app-navigation a{display:flex;align-items:center;min-height:44px;padding:8px 14px;text-decoration:none;border-radius:8px;font-size:14px;color:#4b607a}
.app-navigation a[aria-current=page]{background:var(--blue-soft);color:var(--blue);font-weight:600}
.app-navigation a:hover{background:#e7edf6;color:var(--ink)}
.portal-main{max-width:1136px;margin:0 auto;padding:44px 32px 64px}
.portal-main>h1{font-size:clamp(28px,4vw,40px);font-weight:650;line-height:1.3;letter-spacing:-.02em;margin:0 0 12px;color:var(--ink);text-wrap:balance}
.portal-introduction{max-width:65ch;margin:0 0 32px;color:#53657c;font-size:16px}
.portal-main h2{font-size:23px;font-weight:600;line-height:1.4;color:var(--ink);margin:0 0 16px}
.portal-main h3{font-size:18px;font-weight:600;line-height:1.6;margin:0 0 12px}
.portal-main p{max-width:70ch}
.portal-main .button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;text-decoration:none;white-space:normal;text-align:center}
.portal-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:24px}
.exercise-feature{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:40px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:36px}
.exercise-feature h2{font-size:30px;margin-bottom:20px}
.feature-description{font-size:18px;line-height:1.85;margin:0}
.exercise-meta{color:#53657c;font-size:14px;margin:20px 0 0}
.exercise-figure{margin:0;text-align:center}
.exercise-figure img{display:block;width:100%;height:260px;object-fit:contain}
.exercise-figure figcaption{font-size:12px;color:#53657c;margin-top:10px}
.home-lower{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(220px,1fr);gap:64px;margin-top:40px}
.portal-section{margin:0 0 36px}
.topic-links{list-style:none;padding:0;margin:0}
.topic-links li{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 0;border-bottom:1px solid var(--line)}
.topic-links a{display:flex;align-items:center;min-height:44px;font-size:17px;font-weight:500;text-decoration:none}
.topic-links a:hover,.text-link:hover{color:var(--blue)}
.topic-links span,.portal-note{color:#53657c;font-size:14px}
.attempt-progress p{margin:0 0 8px}
.attempt-status{font-weight:600;color:var(--ink)}
.attempt-progress progress{display:block;width:100%;max-width:380px;height:8px;accent-color:var(--blue);margin:14px 0 16px}
.text-link{display:inline-flex;align-items:center;min-height:44px;color:var(--blue);font-weight:500}
.catalog-intro{display:flex;justify-content:space-between;gap:24px;align-items:center;margin-bottom:28px}
.catalog-intro p{margin:0;max-width:58ch}
.topic-section{padding:28px 0;border-top:1px solid var(--line);scroll-margin-top:24px}
.topic-section-heading{display:flex;align-items:center;justify-content:space-between;gap:24px}
.topic-section-heading h2{margin-bottom:6px}
.topic-section-heading p{margin:0;color:#53657c;font-size:14px}
.portal-main summary{cursor:pointer;min-height:44px;padding:10px 0;color:var(--blue);font-weight:500}
.question-outline{margin-top:12px}
.question-outline ol{padding-left:24px;margin:4px 0 0}
.question-outline li{padding:4px 0 4px 6px}
.question-outline a{display:block;min-height:44px;padding:8px 0;text-decoration:none}
.question-outline a:hover{text-decoration:underline;color:var(--blue)}
.portal-note{margin-top:20px}
.empty-message{padding:22px 24px;background:#fff;border:1px solid var(--line);border-radius:12px;line-height:1.8}
.review-question{padding:24px 0;border-top:1px solid var(--line)}
.review-answer{color:#53657c;margin:0 0 8px}
.question-explanation{max-width:70ch}
.question-explanation p{margin:12px 0;line-height:1.85}
.flagged-list{padding-left:22px}
.flagged-list a{display:block;padding:10px 0;min-height:44px}
.portal-notice{padding:16px 20px;background:#fff8ec;border:1px solid #caaa80;border-radius:12px;color:#67470f;margin:0 0 24px}
.app-footer{max-width:1136px;padding:0 32px 28px;margin:0 auto;color:#53657c;font-size:13px}
@media(max-width:800px){
  .app-header{align-items:flex-start;flex-direction:column;padding:18px 24px;gap:16px}
  .app-navigation{width:100%;gap:2px}
  .app-navigation a{padding-inline:12px}
  .portal-main{padding:32px 24px 44px}
  .exercise-feature{grid-template-columns:minmax(0,1fr) 160px;gap:24px;padding:26px}
  .exercise-feature h2{font-size:25px}
  .exercise-figure img{height:220px}
  .home-lower{gap:32px}
  .app-footer{padding-inline:24px}
}
@media(max-width:560px){
  .app-header{padding-inline:20px}
  .app-header .brand{font-size:17px}
  .app-navigation a{font-size:13px;padding-inline:10px}
  .portal-main{padding:28px 20px 32px}
  .exercise-feature{display:flex;flex-direction:column;align-items:stretch;padding:24px;gap:24px}
  .feature-description{font-size:16px}
  .exercise-figure img{height:190px}
  .home-lower{grid-template-columns:minmax(0,1fr);gap:0;margin-top:32px}
  .catalog-intro,.topic-section-heading{align-items:flex-start;flex-direction:column;gap:16px}
  .portal-main .button{font-size:14px}
  .topic-section{padding-block:24px}
  .app-footer{padding-inline:20px}
}


/* 登入、班別核准及紀錄列表沿用原有字體、色彩與按鈕。 */
.auth-panel{max-width:660px;padding:32px;background:#fff;border:1px solid var(--line);border-radius:14px}
.auth-panel p{line-height:1.9;margin-bottom:24px}
.auth-panel .button{font-size:16px}
#auth-status:empty,#teacher-status:empty{display:none}
#auth-status,#teacher-status{margin:20px 0;color:#67470f;line-height:1.8}
.inline-form{display:flex;gap:16px;align-items:flex-end;flex-wrap:wrap;margin:24px 0 32px}
.inline-form label{display:flex;flex-direction:column;gap:8px;min-width:0;max-width:100%;font-weight:500}
.inline-form input,.inline-form select,.invite-label input{font:inherit;min-height:46px;padding:10px 12px;color:var(--text);background:#fff;border:1px solid #a8b7ce;border-radius:8px;max-width:100%}
.inline-form input{width:320px}
.inline-form select{width:360px}
.account-signout{min-height:44px;padding:8px 14px;border:1px solid var(--line);border-radius:8px;background:#fff;font-size:14px}
.account-signout:hover{background:var(--blue-soft)}
.class-row,.member-row{display:flex;align-items:flex-start;justify-content:space-between;gap:24px;padding:24px 0;border-top:1px solid var(--line)}
.class-row>div,.member-row>div{min-width:0}
.class-row h2,.member-row h3{margin-bottom:8px}
.class-row p,.member-row p{margin:4px 0;overflow-wrap:anywhere}
.invite-label{display:flex;flex-direction:column;gap:8px;font-size:14px;margin-top:16px}
.invite-label input{width:360px;font-variant-numeric:tabular-nums}
.record-row{padding:20px 0;border-top:1px solid var(--line)}
.record-row p{margin:8px 0;color:#53657c}
.record-list{margin-top:36px}
.member-row .portal-actions{margin-top:0}
@media(max-width:650px){
 .auth-panel{padding:24px}
 .class-row,.member-row{flex-direction:column;gap:16px}
 .inline-form{align-items:stretch;flex-direction:column}
 .inline-form input,.inline-form select,.invite-label input{width:100%}
 .class-row .button,.inline-form .button{align-self:flex-start}
 .app-navigation{gap:2px;row-gap:8px}
}

.account-form{display:grid;gap:18px;margin:24px 0 32px;max-width:420px}
.account-form label{display:grid;gap:8px;font-weight:500}
.account-form input{font:inherit;min-height:46px;padding:10px 12px;max-width:100%;width:100%;color:var(--text);background:#fff;border:1px solid #a8b7ce;border-radius:8px}
.account-form .button{justify-self:start}
.account-form .portal-note{margin:0}
.auth-panel details{margin-top:24px;border-top:1px solid var(--line);padding-top:12px}
#account-invite input{font:inherit;max-width:100%;width:390px;padding:12px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink)}

#exercise-import-status{margin:16px 0;line-height:1.8;color:var(--ink)}
#exercise-import-status[role="alert"]{color:#9b2d24}
#exercise-preview:empty{display:none}
.import-preview-heading{margin-top:28px}
.import-preview-heading h3{margin-bottom:8px}
.import-preview-content{display:grid;grid-template-columns:minmax(200px,320px) minmax(0,1fr);gap:32px;align-items:start;padding:24px 0;border-top:1px solid var(--line)}
.import-preview-content>div,.import-preview-content figure{min-width:0}
.import-preview-content figure{margin:0}
.import-preview-content img{display:block;width:100%;height:auto;max-height:420px;object-fit:contain}
.import-preview-content h4{font-size:18px;line-height:1.8;margin-bottom:16px}
.import-preview-content p,.import-preview-content li{line-height:1.9;margin:8px 0;overflow-wrap:anywhere}
.import-preview-content ol{padding-left:28px;margin:16px 0}
.import-answer{font-weight:600;color:var(--ink)}
#exercise-zip{width:360px}
@media(max-width:650px){.import-preview-content{grid-template-columns:minmax(0,1fr);gap:24px}.import-preview-content img{max-height:300px}#exercise-zip{width:100%}}

.analysis-summary{display:flex;gap:28px 48px;flex-wrap:wrap;margin:24px 0}
.analysis-summary dt{color:#53657c;font-size:14px;margin-bottom:6px}
.analysis-summary dd{margin:0;font-size:22px;font-weight:600;color:var(--ink);font-variant-numeric:tabular-nums}
.analysis-columns{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:48px}
.analysis-performance{padding:16px 0;border-top:1px solid var(--line)}
.analysis-performance h3{margin-bottom:4px}
.analysis-performance p{margin:0;color:#53657c;font-size:14px;font-variant-numeric:tabular-nums}
.analysis-performance progress{display:block;width:100%;height:10px;accent-color:var(--blue);margin-top:12px}
.analysis-table-region{max-width:100%;overflow-x:auto;border:1px solid var(--line);border-radius:12px;background:#fff;scrollbar-color:#8093ac #edf2f8}
.analysis-filter-field{display:flex;flex-direction:column;gap:8px;min-width:0;max-width:100%}
.analysis-scroll-hint{display:none}
.analysis-table{width:100%;border-collapse:collapse;font-size:14px;font-variant-numeric:tabular-nums}
.analysis-table caption{text-align:left;padding:16px;font-weight:600;color:var(--ink)}
.analysis-table th,.analysis-table td{text-align:left;vertical-align:top;padding:14px 16px;border-top:1px solid var(--line);min-width:110px;overflow-wrap:anywhere}
.analysis-table thead th{background:#f0f4fa;color:var(--ink);font-weight:600}
.analysis-table tbody th{font-weight:400;min-width:200px;max-width:45ch}
.analysis-table small{display:block;font-size:12px;color:#53657c;margin-top:4px}
.analysis-table p{margin:6px 0;line-height:1.8}
.analysis-table a{display:block;white-space:normal}
.analysis-table-region:focus-visible,#analysis-filters select:focus-visible{outline:3px solid var(--blue);outline-offset:3px}
#analysis-status{line-height:1.8;color:#53657c;margin:0 0 28px}
#analysis-status[role=alert]{color:#9b2d24}
@media(max-width:800px){.analysis-columns{grid-template-columns:minmax(0,1fr);gap:0}.analysis-summary{gap:20px 32px}}
@media(max-width:650px){.analysis-scroll-hint{display:block;color:#53657c;font-size:13px;margin:12px 16px}}