:root{--text:#2d2a32;--muted:#6b6375;--bg:#fafafa;--surface:#fff;--border:#e0dfe4;--accent:#6d28d9;--error:#b91c1c;color:var(--text);background:var(--bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;font:16px/1.5 system-ui,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box}body{margin:0}#root{flex-direction:column;min-height:100svh;display:flex}h1{margin:0 0 16px;font-size:28px}.auth-page{background:var(--surface);border:1px solid var(--border);border-radius:8px;max-width:360px;margin:64px auto;padding:32px}.auth-page form{flex-direction:column;gap:14px;display:flex}.auth-page label{color:var(--muted);flex-direction:column;gap:4px;font-size:14px;display:flex}.auth-page input,.auth-page select{font:inherit;border:1px solid var(--border);border-radius:4px;padding:8px 10px}.auth-page button{font:inherit;background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:4px;padding:10px}.auth-page button:disabled{opacity:.6;cursor:default}.auth-page p{color:var(--muted);margin-top:16px;font-size:14px}.error{color:var(--error);margin:0;font-size:14px}.link-button{font:inherit;color:var(--accent);cursor:pointer;background:0 0;border:none;padding:0;font-size:14px;text-decoration:underline}.link-button:disabled{opacity:.6;cursor:default}.status{text-align:center;color:var(--muted);margin-top:64px}.app-header{background:var(--surface);border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;padding:14px 24px;display:flex}.app-header nav{gap:18px;display:flex}.app-header nav a{color:var(--text);font-weight:500;text-decoration:none}.app-header nav a:hover{color:var(--accent)}.app-header-user{color:var(--muted);align-items:center;gap:12px;font-size:14px;display:flex}.app-header-user button,.action-box button{font:inherit;border:1px solid var(--border);background:var(--surface);cursor:pointer;border-radius:4px;padding:8px 14px}.app-header-user button:disabled,.action-box button:disabled{opacity:.6;cursor:default}main{width:100%;max-width:720px;margin:0 auto;padding:32px 24px}.new-course-form{background:var(--surface);border:1px solid var(--border);border-radius:8px;flex-direction:column;gap:14px;max-width:400px;margin:20px 0 32px;padding:20px;display:flex}.new-course-form h2,.new-course-form h3{margin:0;font-size:16px}.new-course-form label{color:var(--muted);flex-direction:column;gap:4px;font-size:14px;display:flex}.new-course-form input,.new-course-form textarea{font:inherit;border:1px solid var(--border);resize:vertical;border-radius:4px;padding:8px 10px}.new-course-form button{font:inherit;background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:4px;align-self:flex-start;padding:10px}.new-course-form button:disabled{opacity:.6;cursor:default}.course-list{flex-direction:column;gap:10px;padding:0;list-style:none;display:flex}.course-list li{background:var(--surface);border:1px solid var(--border);border-radius:6px;padding:12px 16px}.course-list a{color:var(--accent);font-weight:500;text-decoration:none}.course-list a:hover{text-decoration:underline}.course-teacher{color:var(--muted);font-size:14px}.action-box{margin:20px 0}.assignment-list{flex-direction:column;gap:8px;padding:0;list-style:none;display:flex}.assignment-list li{background:var(--surface);border:1px solid var(--border);border-radius:6px;padding:10px 14px}.submission-list{flex-direction:column;gap:12px;padding:0;list-style:none;display:flex}.submission-list li{background:var(--surface);border:1px solid var(--border);border-radius:6px;padding:14px}.submission-list .new-course-form{max-width:320px;margin-top:10px}.quiz-badge{color:var(--accent);background:color-mix(in srgb, var(--accent) 12%, transparent);border-radius:999px;margin-left:6px;padding:2px 8px;font-size:12px;font-weight:600;display:inline-block}.checkbox-label{align-items:center;flex-direction:row!important;gap:8px!important}.quiz-builder{border-top:1px solid var(--border);flex-direction:column;gap:16px;padding-top:8px;display:flex}.quiz-builder-question{background:var(--bg);border:1px solid var(--border);border-radius:6px;flex-direction:column;gap:8px;padding:12px;display:flex}.quiz-builder-option{align-items:center;gap:8px;display:flex}.quiz-builder-option input[type=text],.quiz-builder-option input:not([type=radio]){flex:1}.quiz-history ul,.quiz-result ul{color:var(--muted);margin:8px 0 0;padding:0;font-size:14px;list-style:none}.quiz-result{margin-bottom:12px}.quiz-taker fieldset{border:1px solid var(--border);border-radius:6px;margin:0;padding:12px}.quiz-taker legend{padding:0 6px;font-weight:500}.quiz-option-label{align-items:center;padding:4px 0;flex-direction:row!important;gap:8px!important;display:flex!important}