:root{
  --bg:#fbf8f1;
  --bg2:#f3efe4;
  --ink:#1f2728;
  --muted:#64706f;
  --line:#ded7c8;
  --gold:#b98b44;
  --gold2:#e6d2a9;
  --green:#4e6f66;
  --green2:#e5eee9;
  --white:#fffefb;
  --shadow:0 18px 50px rgba(31,39,40,.12);
  --radius:22px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:linear-gradient(180deg,var(--bg),#fff);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Hiragino Sans","Yu Gothic",YuGothic,"Noto Sans JP",Meiryo,sans-serif;line-height:1.75}
a{color:inherit}
.site-header{min-height:72vh;display:grid;place-items:center;padding:64px 20px;background:radial-gradient(circle at 20% 15%,rgba(230,210,169,.55),transparent 32%),radial-gradient(circle at 80% 25%,rgba(78,111,102,.18),transparent 28%),linear-gradient(135deg,#fffdf6,#f1eadb 55%,#e7efe9);position:relative;overflow:hidden}
.site-header:before{content:"";position:absolute;inset:28px;border:1px solid rgba(185,139,68,.35);border-radius:32px;pointer-events:none}
.header-inner{max-width:1000px;text-align:center;position:relative;z-index:1}
.eyebrow{letter-spacing:.14em;text-transform:uppercase;color:var(--gold);font-size:.82rem;font-weight:700;margin:0 0 10px}
h1{font-size:clamp(2.3rem,6vw,5rem);line-height:1.08;margin:0 0 22px;font-weight:800;letter-spacing:.02em}
h1 span{font-size:.72em;color:var(--green)}
.lead{max-width:760px;margin:0 auto 28px;font-size:clamp(1rem,2.2vw,1.25rem);color:#3f4948}
.header-actions,.form-actions,.quiz-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.button{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:999px;padding:11px 20px;text-decoration:none;background:var(--white);font-weight:700;cursor:pointer;font-size:1rem;transition:.2s ease;min-height:44px}
.button:hover{transform:translateY(-1px);box-shadow:0 8px 24px rgba(31,39,40,.12)}
.button.primary{background:linear-gradient(135deg,var(--green),#2f5149);color:#fff;border-color:transparent}.button.ghost{background:rgba(255,255,255,.72)}
.top-nav{position:sticky;top:0;z-index:10;display:flex;gap:4px;justify-content:center;flex-wrap:wrap;padding:10px 12px;background:rgba(255,254,251,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.top-nav a{padding:9px 12px;border-radius:999px;text-decoration:none;font-size:.92rem;color:#3a4543}.top-nav a:hover{background:var(--green2)}
.section{max-width:1120px;margin:0 auto;padding:72px 20px}.section-title{max-width:760px;margin:0 auto 34px;text-align:center}.section-title h2{font-size:clamp(1.8rem,4vw,3rem);line-height:1.18;margin:0 0 14px}.section-title p{color:var(--muted)}
.grid{display:grid;gap:20px}.grid.three{grid-template-columns:repeat(3,1fr)}.grid.two{grid-template-columns:repeat(2,1fr)}
.card,.lecture-card,.reset-step,.quiz-box,.observation-form,.diagram-card,.notice{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.card{padding:28px}.card-num{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:var(--green2);color:var(--green);font-weight:800;margin-bottom:14px}.card h3,.lecture-card h3,.reset-step h3,.diagram-card h3{margin-top:0;line-height:1.35}.notice{padding:20px 24px;margin-top:24px;background:#fff9ec;border-color:#ead6aa}
.lecture-list{display:grid;gap:22px}.lecture-card{padding:28px;position:relative;overflow:hidden}.lecture-card:before{content:"";position:absolute;left:0;top:0;bottom:0;width:6px;background:linear-gradient(var(--gold),var(--green))}.lecture-head{display:flex;gap:16px;align-items:flex-start;flex-wrap:wrap}.lecture-no{display:inline-flex;padding:5px 12px;border-radius:999px;background:var(--green2);color:var(--green);font-weight:800}.lecture-copy{font-size:1.08rem;color:#394544}.mini-columns{display:grid;grid-template-columns:1.2fr 1fr;gap:18px;margin-top:18px}.mini-columns>div{background:#faf7ef;border:1px solid var(--line);border-radius:18px;padding:18px}.mini-columns h4{margin:0 0 8px;color:var(--green)}
.reset-layout{display:grid;grid-template-columns:230px 1fr;gap:22px;align-items:start}.reset-menu{position:sticky;top:68px;display:grid;gap:8px;background:var(--white);border:1px solid var(--line);border-radius:20px;padding:14px;box-shadow:var(--shadow)}.reset-menu a{text-decoration:none;padding:10px 12px;border-radius:14px;color:#394544}.reset-menu a:hover{background:var(--green2)}.reset-content{display:grid;gap:18px}.reset-step{padding:26px}.reset-step.highlight{background:linear-gradient(135deg,#fffdf6,#eef6f1)}.reset-step.optional{border-style:dashed}.tip{background:#f7f1e2;border-left:4px solid var(--gold);padding:12px 14px;border-radius:12px;margin-top:12px}.check-list{list-style:none;padding:0}.check-list li{padding-left:28px;position:relative;margin:8px 0}.check-list li:before{content:"✓";position:absolute;left:0;color:var(--green);font-weight:900}.routine{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;margin:16px 0}.routine div{background:var(--white);border:1px solid var(--line);border-radius:16px;padding:14px;text-align:center}.routine strong{display:block;color:var(--green);font-size:1.15rem}.routine span{font-size:.9rem;color:var(--muted)}
.quiz-box{max-width:780px;margin:0 auto;padding:28px}.quiz-progress{text-align:right;color:var(--muted);font-weight:700}.quiz-options{display:grid;gap:10px;margin:20px 0}.quiz-option{border:1px solid var(--line);border-radius:16px;padding:14px;background:#fff;cursor:pointer;text-align:left;font-size:1rem}.quiz-option.selected{border-color:var(--green);background:var(--green2)}.quiz-option.correct{border-color:#2f7b53;background:#e8f7ef}.quiz-option.wrong{border-color:#b65757;background:#fff0f0}.quiz-feedback{font-weight:700;min-height:2.5em}
.observation-form{max-width:820px;margin:0 auto;padding:28px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.observation-form label{display:grid;gap:8px;margin-bottom:14px;font-weight:700}.observation-form input,.observation-form textarea,.observation-form select{width:100%;border:1px solid var(--line);border-radius:14px;padding:12px 14px;font:inherit;background:#fff}.save-status{text-align:center;color:var(--green);font-weight:700}
.loop-diagram{width:min(360px,100%);aspect-ratio:1;position:relative;margin:20px auto;border-radius:50%;border:2px dashed var(--gold2);display:grid;place-items:center}.loop-diagram span{position:absolute;background:var(--white);border:1px solid var(--line);border-radius:999px;padding:8px 12px;font-weight:700;font-size:.88rem;box-shadow:0 8px 18px rgba(31,39,40,.08)}.loop-diagram span:nth-child(1){top:-4px}.loop-diagram span:nth-child(2){right:-8px;top:32%}.loop-diagram span:nth-child(3){right:18%;bottom:0}.loop-diagram span:nth-child(4){left:4%;bottom:12%}.loop-diagram span:nth-child(5){left:-8px;top:32%}.map-diagram{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin:20px 0}.map-diagram div{padding:18px;border-radius:18px;background:linear-gradient(135deg,var(--green2),#fff);border:1px solid var(--line);text-align:center;font-weight:800}.map-diagram small{font-weight:600;color:var(--muted)}
.site-footer{text-align:center;padding:40px 20px;background:#22302d;color:#fff}.site-footer a{color:#fff}
@media (max-width:860px){.grid.three,.grid.two,.mini-columns,.reset-layout,.routine{grid-template-columns:1fr}.reset-menu{position:static}.form-grid{grid-template-columns:1fr}.section{padding:52px 16px}.site-header:before{inset:14px}.lecture-card,.card,.reset-step,.quiz-box,.observation-form{padding:22px}.top-nav{justify-content:flex-start;overflow-x:auto;flex-wrap:nowrap}.top-nav a{white-space:nowrap}}
@media print{.site-header,.top-nav,.reset-menu,.quiz-box,.site-footer,.button{display:none!important}.section{padding:20px}.observation-form{box-shadow:none;border:1px solid #aaa}}