/* ★編集OK: 既存教材の青・白を受け継ぐ共通部分 */
.lab-nav,.lab-footer{font-family:"Hiragino Sans","Yu Gothic",Meiryo,sans-serif;font-size:1rem;line-height:1.8;color:#253d50;background:#eef4f9;box-sizing:border-box}
.lab-nav{padding:12px 20px;border-bottom:1px solid #c8d4de;display:flex;flex-wrap:wrap;gap:8px 24px;align-items:center}
.lab-nav a,.lab-footer a,.lab-panel a,.lab-article a{color:#20557d;text-underline-offset:3px}
.lab-nav .lab-brand{font-weight:700;margin-right:auto;text-decoration:none}
.lab-footer{padding:28px 20px 80px;border-top:1px solid #c8d4de;text-align:center;margin-top:32px}
.lab-footer nav{display:flex;flex-wrap:wrap;justify-content:center;gap:8px 22px}
.lab-footer p{font-size:.9rem;margin:14px 0 0}
.lab-panel{padding:18px 22px;background:#f0f6fa;border:1px solid #c8d4de;border-left:5px solid #2c5f8a;border-radius:8px;margin:22px 0;line-height:1.9;color:#263c4c}
.lab-panel h2,.lab-panel h3{margin-top:0;font-size:1.15rem}
.lab-panel ul{padding-left:1.5em;margin-bottom:0}
.lab-panel .lab-meta{font-size:.9rem;color:#4b5b69;margin:0 0 8px}
.lab-review details{background:white;border:1px solid #c8d4de;padding:12px 16px;margin:12px 0;border-radius:6px}
.lab-review summary{cursor:pointer;font-weight:600}
.lab-review pre,.lab-initial-code pre{overflow-x:auto;font-size:1rem;line-height:1.7;white-space:pre}
.lab-initial-code{border:1px solid #c8d4de;background:#f6f8fa;padding:8px 12px;border-radius:6px;margin:12px 0}
.lab-initial-code summary{font-size:.9rem;cursor:pointer;color:#234e70}
.lab-skip{position:absolute;left:12px;top:-100px;background:white;padding:12px;z-index:200}
.lab-skip:focus{top:8px}
.lab-article{margin:0;color:#25323e;background:#fbfbf9;font:1rem/1.95 "Hiragino Sans","Yu Gothic",Meiryo,sans-serif}
.lab-article *{box-sizing:border-box}
.lab-article main{max-width:880px;margin:0 auto;padding:32px 20px 60px}
.lab-article h1{font-size:clamp(1.5rem,4vw,2.1rem);line-height:1.5;color:#244f72;margin:12px 0 20px}
.lab-article h2{font-size:1.3rem;line-height:1.6;color:#244f72;margin:38px 0 14px;padding-bottom:8px;border-bottom:2px solid #cedce8}
.lab-article h3{font-size:1.12rem;margin:26px 0 10px}
.lab-article p{margin:0 0 16px}
.lab-article pre{background:#f0f4f7;padding:16px;border-left:4px solid #2c5f8a;border-radius:6px;overflow:auto;font-size:1rem;line-height:1.75}
.lab-article code{font-family:ui-monospace,Consolas,monospace;overflow-wrap:anywhere}
.lab-article details{background:white;border:1px solid #b9ccdc;border-radius:6px;padding:12px 16px;margin:14px 0}
.lab-article summary{font-weight:600;cursor:pointer;color:#244f72}
.lab-article table{border-collapse:collapse;width:100%;margin:16px 0;font-size:1rem}
.lab-article th,.lab-article td{border:1px solid #c8d4de;padding:10px;text-align:left;vertical-align:top}
.lab-article th{background:#e8f1f8}
.lab-table{overflow-x:auto}
.lab-button{display:inline-block;background:#2c5f8a;color:white!important;padding:10px 18px;border-radius:6px;text-decoration:none;font-weight:600}
.lab-article .lab-meta{color:#586875;font-size:.9rem}
.lab-article .lab-breadcrumb{font-size:.9rem}
.lab-article a:focus-visible,.lab-nav a:focus-visible,.lab-footer a:focus-visible,summary:focus-visible{outline:3px solid #b05040;outline-offset:4px}
@media(max-width:600px){.lab-nav{gap:6px 16px;padding:10px 16px}.lab-nav .lab-brand{flex-basis:100%}.lab-panel{padding:15px}.lab-article main{padding:22px 16px 40px}.profiles{grid-template-columns:1fr!important}.lab-review pre{font-size:.9rem}}
@media print{.lab-nav,.lab-footer,.lab-skip{display:none}.lab-article main{max-width:none;padding:0}.lab-panel{break-inside:avoid}}
.lab-form{background:#fff;border:1px solid #b9ccdc;border-top:4px solid #2c5f8a;border-radius:8px;padding:24px;margin:24px 0}
.lab-form>label{display:block;font-weight:600;margin:18px 0 7px}.lab-form>label:first-child{margin-top:0}
.lab-form input:not([type=checkbox]),.lab-form textarea,.lab-form select{width:100%;font:inherit;line-height:1.6;color:#25323e;border:1px solid #7894aa;border-radius:5px;background:white;padding:10px 12px}
.lab-form textarea{resize:vertical;min-height:150px}.lab-form .lab-checkbox{display:flex;align-items:flex-start;gap:10px;font-weight:400}.lab-checkbox input{width:20px;height:20px;flex:0 0 20px;margin-top:6px}
.lab-form .lab-meta{font-size:.9rem;margin:6px 0 14px}.lab-button{font:inherit;border:0;cursor:pointer;min-height:44px}.lab-button:disabled{cursor:wait;opacity:.6}
.lab-form :focus-visible,.lab-button:focus-visible{outline:3px solid #b05040;outline-offset:3px}
.lab-honeypot{position:absolute;left:-10000px;width:1px;height:1px;overflow:hidden}.lab-form-status{margin:14px 0 0!important;white-space:pre-line}.lab-form-status[data-error=true]{color:#9a241e}
.lab-post{border:1px solid #c8d4de;border-left:4px solid #2c5f8a;padding:20px;border-radius:6px;background:white;margin:18px 0}.lab-post header{display:flex;gap:14px;flex-wrap:wrap;align-items:baseline}.lab-post .lab-message{white-space:pre-wrap;overflow-wrap:anywhere;margin:12px 0 0}.lab-admin-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:16px}.lab-admin-actions .lab-secondary{color:#244f72!important;background:#e8f1f8}
[hidden]{display:none!important}@media(max-width:600px){.lab-form{padding:18px 15px}.lab-form .lab-button{width:100%}}