:root{--navy: #1f3a5f;--navy-light: #2f4f7f;--maroon: #8d0f06;--bg: #f5f7fa;--card: #ffffff;--border: #d8dee6;--text: #1a2733;--muted: #6b7785;--ok: #1f8a4c;--warn: #b8860b;--danger: #b00020;--radius: 8px;font-family:Yu Gothic,Yu Gothic UI,Meiryo,system-ui,sans-serif}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg);color:var(--text)}a{color:var(--navy)}.app-shell{display:flex;min-height:100vh}.sidebar{width:220px;background:var(--navy);color:#fff;padding:16px;flex-shrink:0;position:sticky;top:0;align-self:flex-start;height:100vh;overflow-y:auto;box-sizing:border-box}.sidebar h1{font-size:15px;margin:0 0 16px;line-height:1.4}.sidebar nav a{display:block;color:#dbe4f0;text-decoration:none;padding:9px 10px;border-radius:6px;margin-bottom:2px;font-size:14px}.sidebar nav a:hover{background:var(--navy-light)}.sidebar nav a.active{background:#fff;color:var(--navy);font-weight:600}.main{flex:1;display:flex;flex-direction:column;min-width:0}.topbar{background:var(--card);border-bottom:1px solid var(--border);padding:12px 24px;display:flex;justify-content:space-between;align-items:center}.content{padding:24px;max-width:1100px;width:100%}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-bottom:16px}h2{color:var(--navy);font-size:20px;margin-top:0}h3{color:var(--navy);font-size:16px}.btn{background:var(--navy);color:#fff;border:none;border-radius:6px;padding:9px 16px;font-size:14px;cursor:pointer;text-decoration:none;display:inline-block}a.btn,a.btn:hover{text-decoration:none}.btn:hover{background:var(--navy-light)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn.secondary{background:#fff;color:var(--navy);border:1px solid var(--navy)}.btn.danger{background:var(--danger)}.btn.small{padding:5px 10px;font-size:13px}input,select,textarea{width:100%;padding:8px 10px;border:1px solid var(--border);border-radius:6px;font-size:14px;font-family:inherit}label{display:block;font-size:13px;color:var(--muted);margin:10px 0 4px}table{width:100%;border-collapse:collapse;font-size:14px}th,td{text-align:left;padding:10px;border-bottom:1px solid var(--border)}th{color:var(--muted);font-weight:600;font-size:13px}.badge{display:inline-block;padding:2px 8px;border-radius:999px;font-size:12px}.badge.ok{background:#e3f5ea;color:var(--ok)}.badge.warn{background:#fdf2df;color:var(--warn)}.badge.muted{background:#eceff3;color:var(--muted)}.alert{padding:12px 14px;border-radius:6px;margin-bottom:14px;font-size:14px}.alert.error{background:#fdecef;color:var(--danger);border:1px solid #f3c2cc}.alert.ok{background:#e3f5ea;color:var(--ok);border:1px solid #b7e2c7}.center-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}.login-card{width:360px;max-width:100%}.muted{color:var(--muted)}.row{display:flex;gap:12px;flex-wrap:wrap;align-items:center}.spacer{flex:1}.stat{font-size:28px;font-weight:700;color:var(--navy)}.creds{background:#f0f3f8;border:1px dashed var(--navy);border-radius:6px;padding:12px;font-family:monospace}ul.sidebar-note{font-size:12px;color:#aebfd6;padding-left:16px;margin-top:24px}.plain-header{background:var(--navy);color:#fff;padding:12px 24px;display:flex;align-items:center;justify-content:space-between}.plain-header h1{font-size:16px;margin:0}.plain-header a{color:#fff;text-decoration:none}.plain-main{max-width:880px;margin:0 auto;padding:24px}.user-menu{position:relative;flex-shrink:0}.user-menu-btn{background:none;border:none;color:#fff;cursor:pointer;display:flex;align-items:center;gap:6px;padding:6px 8px;width:auto;font-size:14px}.user-menu-btn:hover{opacity:.85}.user-menu-caret{font-size:10px}.user-menu-name{max-width:40vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.user-menu-dropdown{position:absolute;right:0;top:100%;margin-top:6px;z-index:40;background:var(--card);color:var(--text);border:1px solid var(--border);border-radius:8px;box-shadow:0 8px 24px #0000002e;min-width:180px;padding:6px}.user-menu-head{font-size:12px;color:var(--muted);padding:6px 10px;border-bottom:1px solid var(--border);margin-bottom:4px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.user-menu-item{width:100%;text-align:left;background:none;border:none;cursor:pointer;padding:9px 10px;border-radius:6px;font-size:14px;color:var(--text)}.user-menu-item:hover{background:#f2f5fa}.plain-main.wide{max-width:none}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;z-index:50;display:flex;align-items:flex-start;justify-content:center;padding:48px 16px;overflow:auto}.modal{background:var(--card);border-radius:var(--radius);width:520px;max-width:100%;box-shadow:0 12px 40px #00000040}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;border-bottom:1px solid var(--border)}.modal-close{background:none;border:none;font-size:22px;line-height:1;cursor:pointer;color:var(--muted);width:auto}.modal-body{padding:18px}.accordion{padding:0;overflow:hidden}.accordion-head{width:100%;text-align:left;background:none;border:none;padding:14px 16px;cursor:pointer;display:flex;gap:10px;align-items:center;font-size:15px;color:var(--navy);font-weight:600}.accordion-head:hover{background:#f2f5fa}.accordion-caret{color:var(--muted);font-size:12px;flex-shrink:0}.accordion-title{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis}.accordion-body{padding:4px 16px 16px;border-top:1px solid var(--border)}.drag-item{display:flex;gap:10px;align-items:flex-start}.drag-item .drag-body{flex:1;min-width:0}.drag-handle{cursor:grab;color:var(--muted);-webkit-user-select:none;user-select:none;padding:6px 2px;font-size:18px;line-height:1}.drag-item.dragging{opacity:.45}.drag-item.drag-over{border-top:3px solid var(--navy)}.choice-row{display:flex;gap:8px;align-items:center;margin:6px 0}.choice-row input[type=text]{flex:1}.choice-correct{display:flex;gap:4px;align-items:center;white-space:nowrap;font-size:13px;color:var(--text);margin:0;width:auto}.choice-row input[type=checkbox],.choice-row input[type=radio]{width:auto}.choice-remove{background:none;border:1px solid var(--border);border-radius:6px;cursor:pointer;padding:4px 9px;color:var(--muted);width:auto}.test-guide{position:sticky;top:16px}.detail-list{display:grid;grid-template-columns:160px 1fr;gap:8px 16px;margin:12px 0 0}.detail-list dt{color:var(--muted);font-size:13px}.detail-list dd{margin:0}.toast{position:fixed;top:16px;left:50%;transform:translate(-50%);z-index:60;padding:12px 20px;border-radius:8px;font-size:14px;font-weight:600;box-shadow:0 8px 24px #00000038;cursor:pointer;max-width:90vw;animation:toast-in .18s ease-out}.toast.ok{background:#e3f5ea;color:var(--ok);border:1px solid #b7e2c7}.toast.error{background:#fdecef;color:var(--danger);border:1px solid #f3c2cc}@keyframes toast-in{0%{opacity:0;transform:translate(-50%,-8px)}to{opacity:1;transform:translate(-50%)}}.field-error{color:var(--danger);font-size:12px;margin-top:4px}