:root{
  --bg:#f4f5f7;
  --header:#1f2a37;
  --blue:#2563eb;
  --blue-dark:#1d4ed8;
  --text:#1f2937;
  --muted:#6b7280;
  --border:#e5e7eb;
  --card:#ffffff;
  --green:#22c55e;
}
*{box-sizing:border-box;margin:0;padding:0}
[hidden]{display:none !important}
html,body{height:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Noto Sans JP","Segoe UI",sans-serif;
  background:var(--bg);color:var(--text);line-height:1.7;
  display:flex;flex-direction:column;min-height:100vh;
}
a{color:inherit;text-decoration:none}
button{font-family:inherit}

/* ---------- ヘッダー ---------- */
.site-header{position:sticky;top:0;z-index:50;background:var(--header);color:#fff;height:60px;display:flex;align-items:center}
.header-inner{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between;position:relative}
.site-title{font-size:18px;font-weight:700;cursor:pointer;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.hamburger{background:transparent;border:1px solid rgba(255,255,255,.5);border-radius:6px;width:46px;height:34px;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:4px;cursor:pointer;flex:none;margin-left:16px}
.hamburger span{display:block;width:20px;height:2px;background:#fff}
.menu-dropdown{position:absolute;right:24px;top:48px;background:#fff;color:var(--text);border:1px solid var(--border);border-radius:8px;box-shadow:0 8px 24px rgba(0,0,0,.14);min-width:170px;overflow:hidden}
.menu-dropdown a{display:block;padding:13px 18px;font-size:14px;color:var(--muted)}
.menu-dropdown a:hover{background:#f3f4f6}

.floating-play{position:fixed;top:14px;left:50%;transform:translateX(-50%);z-index:60;width:42px;height:42px;border-radius:50%;border:none;background:#3b82f6;color:#fff;font-size:15px;cursor:pointer;box-shadow:0 4px 12px rgba(59,130,246,.5);display:flex;align-items:center;justify-content:center;padding-left:3px}

.site-footer{margin-top:auto;text-align:center;color:var(--muted);font-size:13px;padding:28px 16px;border-top:1px solid var(--border)}

/* ---------- 共通レイアウト ---------- */
#app{flex:1}
.container{max-width:1100px;margin:0 auto;padding:32px 24px}
.section-head{display:flex;align-items:center;gap:10px;margin:34px 0 18px}
.section-head .bar{width:5px;height:24px;background:var(--blue);border-radius:2px}
.section-head h2{font-size:21px;font-weight:700}
.btn-primary{background:var(--blue);color:#fff;border:none;border-radius:6px;padding:9px 18px;font-size:14px;font-weight:600;cursor:pointer}
.btn-primary:hover{background:var(--blue-dark)}
.btn-ghost{background:#fff;color:var(--blue);border:1px solid var(--blue);border-radius:6px;padding:9px 18px;font-size:14px;font-weight:600;cursor:pointer}

/* ---------- ログイン ---------- */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#1f2a37,#0f172a);padding:24px}
.login-card{background:#fff;border-radius:14px;box-shadow:0 20px 60px rgba(0,0,0,.3);width:100%;max-width:400px;padding:40px 34px}
.login-card .brand{text-align:center;font-weight:800;font-size:19px;margin-bottom:4px}
.login-card .sub{text-align:center;color:var(--muted);font-size:13px;margin-bottom:26px}
.login-card label{display:block;font-size:13px;font-weight:600;margin:14px 0 6px}
.login-card input{width:100%;padding:12px 14px;border:1px solid var(--border);border-radius:8px;font-size:15px}
.login-card input:focus{outline:none;border-color:var(--blue)}
.login-card .btn-primary{width:100%;margin-top:24px;padding:13px}
.login-hint{margin-top:16px;font-size:12px;color:var(--muted);text-align:center;line-height:1.6}

/* ---------- ホーム ---------- */
.info-row{display:flex;align-items:center;justify-content:space-between;background:#fff;border:1px solid var(--border);border-radius:10px;padding:18px 22px;cursor:pointer}
.info-row .ttl{font-weight:700}
.info-row .desc{color:var(--muted);font-size:13px}
.info-row .arrow{color:var(--muted)}

.value-box{background:#fff;border:1px solid var(--border);border-radius:10px;padding:24px;margin-top:16px}
.value-box .cap{color:var(--muted);font-size:13px}
.value-box .amount{font-size:34px;font-weight:800;margin:4px 0}
.value-box .amount small{font-size:15px;font-weight:600;color:var(--muted)}
.value-box .note{color:var(--muted);font-size:13px}
.value-box .toggle{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--border);margin-top:18px;padding-top:16px;cursor:pointer;font-weight:600;font-size:14px}
.value-table{width:100%;border-collapse:collapse;margin-top:14px;font-size:13px}
.value-table th,.value-table td{border-bottom:1px solid var(--border);padding:8px 10px;text-align:left}
.value-table td.num{text-align:right;white-space:nowrap}

.filter-bar{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:30px;flex-wrap:wrap}
.filter-left{display:flex;align-items:center;gap:10px}
.filter-left label{font-size:13px;color:var(--muted)}
.filter-left select{padding:7px 10px;border:1px solid var(--border);border-radius:6px;font-size:14px;background:#fff}
.search-box{display:flex;align-items:center;border:1px solid var(--border);border-radius:6px;background:#fff;overflow:hidden}
.search-box input{border:none;padding:9px 12px;font-size:14px;width:230px}
.search-box input:focus{outline:none}
.search-box button{border:none;background:#fff;padding:0 12px;cursor:pointer;color:var(--muted)}

.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.course-card{background:var(--card);border:1px solid var(--border);border-radius:10px;overflow:hidden;display:flex;flex-direction:column}
.thumb{height:150px;display:flex;align-items:center;justify-content:center;color:#fff;text-align:center;font-weight:800;font-size:22px;line-height:1.25;padding:14px;position:relative}
.thumb .badge{position:absolute;top:10px;left:10px;background:rgba(255,255,255,.9);color:#111;font-size:11px;font-weight:700;padding:3px 8px;border-radius:4px}
.thumb .brandtag{position:absolute;bottom:8px;right:10px;font-size:10px;opacity:.85;font-weight:700;letter-spacing:.5px}
.course-card .body{padding:16px;display:flex;flex-direction:column;gap:12px;flex:1}
.course-card .title{font-size:15px;font-weight:700;min-height:44px}
.progress{height:6px;background:#e5e7eb;border-radius:4px;overflow:hidden}
.progress > span{display:block;height:100%;background:var(--blue)}
.course-card .foot{display:flex;align-items:center;justify-content:space-between;margin-top:auto}
.course-card .pct{font-size:12px;color:var(--muted)}

/* ---------- コース詳細 ---------- */
.crumb{font-size:13px;color:var(--muted);margin-bottom:18px}
.crumb a:hover{color:var(--blue)}
.course-layout{display:flex;gap:28px;align-items:flex-start}
.course-side{width:240px;flex:none}
.course-side .thumb{height:150px;border-radius:10px}
.course-side .progress{margin-top:14px}
.course-side .pct{text-align:center;color:var(--muted);font-size:13px;margin-top:8px}
.course-main{flex:1}
.lesson-block{background:#fff;border:1px solid var(--border);border-radius:10px;overflow:hidden}
.lesson-block .bh{background:#f9fafb;padding:14px 18px;font-weight:700;border-bottom:1px solid var(--border)}
.lesson-item{display:flex;align-items:center;justify-content:space-between;padding:15px 18px;border-bottom:1px solid var(--border);gap:14px}
.lesson-item:last-child{border-bottom:none}
.lesson-item .left{display:flex;align-items:center;gap:12px;cursor:pointer}
.lesson-item .left:hover .lt{color:var(--blue)}
.mark{width:20px;height:20px;border-radius:50%;border:1.5px solid #cbd5e1;flex:none;display:flex;align-items:center;justify-content:center;font-size:12px}
.mark.done{background:var(--green);border-color:var(--green);color:#fff}
.lt{font-size:15px}

/* ---------- レッスン視聴 ---------- */
.lesson-layout{display:flex;gap:0;align-items:stretch;min-height:calc(100vh - 60px)}
.lesson-side{width:300px;flex:none;background:#fff;border-right:1px solid var(--border);padding:18px 0}
.lesson-side .sh{padding:0 20px 12px;font-weight:700;border-bottom:1px solid var(--border);margin-bottom:8px;display:flex;align-items:center;gap:10px}
.lesson-side .sh a{color:var(--muted)}
.lesson-nav a{display:flex;gap:10px;padding:11px 20px;font-size:14px;align-items:flex-start}
.lesson-nav a.active{background:#eff6ff;color:var(--blue);font-weight:600}
.lesson-nav a:hover{background:#f3f4f6}
.lesson-content{flex:1;padding:26px 40px;max-width:900px}
.lesson-content h2{font-size:24px;margin:6px 0 18px}
.video-wrap{position:relative;width:100%;aspect-ratio:16/9;background:#000;border-radius:8px;overflow:hidden;margin-bottom:24px}
.video-wrap video{width:100%;height:100%;display:block;object-fit:contain;background:#0b1f4d}
.lesson-body h3{font-size:22px;margin:10px 0 16px}
.callout{border:1px solid #bbf7d0;background:#f0fdf4;border-radius:10px;padding:18px 20px;position:relative;margin:18px 0}
.callout .check{position:absolute;top:-12px;left:18px;width:26px;height:26px;border-radius:50%;background:var(--green);color:#fff;display:flex;align-items:center;justify-content:center;font-size:14px}
.lesson-body p{margin:10px 0}
.complete-bar{margin-top:30px;display:flex;align-items:center;gap:14px}
.complete-bar .done-label{color:var(--green);font-weight:700}

@media(max-width:860px){
  .card-grid{grid-template-columns:1fr 1fr}
  .course-layout{flex-direction:column}
  .course-side{width:100%}
  .lesson-layout{flex-direction:column}
  .lesson-side{width:100%;border-right:none;border-bottom:1px solid var(--border)}
  .lesson-content{padding:20px}
}
@media(max-width:560px){
  .card-grid{grid-template-columns:1fr}
}