:root{
  --gradient-brand:linear-gradient(135deg,#EFBE76,#F3B3BB,#DAB5CD,#A4B5DA,#4FADDF);
  --gradient-warm:linear-gradient(135deg,#EFBE76,#F3B3BB);
  --gradient-cool:linear-gradient(135deg,#A4B5DA,#4FADDF);
  /* 文字用に暗めに調整したグラデ（白背景で読めるコントラストを確保） */
  --gradient-text:linear-gradient(135deg,#C2872B,#C25E6E,#7A6FA8,#2179B5);
  --color-ocean:#4FADDF;--color-ocean-deep:#2179B5;
  --color-sunset:#EFBE76;--color-pink:#E690A1;
  --color-lavender:#DAB5CD;--color-sky:#66B1D9;
  --color-text-primary:#1A1A2E;--color-text-secondary:#4A5568;
  --color-text-tertiary:#6E7378;/* 補足テキスト用（4.5:1確保）。#9FA0A0はプレースホルダー専用 */
  --color-border:#E2E8F0;--color-surface:#FFFFFF;--color-background:#F7F8FC;--color-background-alt:#EEF2F7;
  --color-success:#38B2AC;--color-success-deep:#2C7A7B;
  --color-warning:#EFBE76;--color-error:#E53E3E;--color-info:#4FADDF;
  --tint-ocean:rgba(79,173,223,.07);
  --font-heading:"Mamelon","M PLUS Rounded 1c","Rounded Mplus 1c","Noto Sans JP",sans-serif;
  --font-body:"GenEi Gothic","Noto Sans JP","Hiragino Sans",sans-serif;
  --font-mono:"Montserrat","Inter",sans-serif;
  --radius-sm:6px;--radius-md:8px;--radius-lg:12px;--radius-xl:16px;--radius-full:100px;
  --shadow-sm:0 1px 3px rgba(0,0,0,.04),0 1px 2px rgba(0,0,0,.03);
  --shadow-md:0 4px 12px rgba(0,0,0,.06);
  --shadow-lg:0 8px 24px rgba(0,0,0,.08);
  --shadow-ocean:0 2px 8px rgba(79,173,223,.3);
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-padding-top:80px;}
body{margin:0;font-family:var(--font-body);color:var(--color-text-primary);
  background:var(--color-background);line-height:1.8;letter-spacing:.03em;
  -webkit-font-smoothing:antialiased;}
a{color:var(--color-ocean-deep);text-decoration:none;}
a:hover{text-decoration:underline;}
img{max-width:100%;display:block;}
h1,h2,h3{font-family:var(--font-heading);font-weight:700;letter-spacing:.02em;}
:focus-visible{outline:3px solid var(--color-text-primary);outline-offset:2px;}
.btn-primary:focus-visible{outline-color:var(--color-text-primary);box-shadow:0 0 0 2px #fff;}
.wrap{max-width:1080px;margin:0 auto;padding:0 24px;}
.wrap-narrow{max-width:880px;margin:0 auto;padding:0 24px;}

.ico{width:16px;height:16px;display:inline-block;vertical-align:-3px;flex:none;}
.btn .ico{width:15px;height:15px;vertical-align:-2px;}

@keyframes fadeUp{from{opacity:0;transform:translateY(18px);}to{opacity:1;transform:none;}}
@keyframes drift{0%,100%{transform:translate(0,0) scale(1);}50%{transform:translate(18px,-22px) scale(1.06);}}
@keyframes drift2{0%,100%{transform:translate(0,0) scale(1);}50%{transform:translate(-20px,16px) scale(.95);}}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none !important;transition:none !important;}
}

/* ================= Header ================= */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.78);
  backdrop-filter:saturate(180%) blur(14px);-webkit-backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid rgba(226,232,240,.8);}
@supports not ((backdrop-filter:blur(1px)) or (-webkit-backdrop-filter:blur(1px))){
  .site-header{background:rgba(255,255,255,.96);}
}
.site-header::after{content:"";display:block;height:2px;background:var(--gradient-brand);opacity:.9;}
.site-header .bar{display:flex;align-items:center;gap:14px;height:62px;}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--font-heading);
  font-weight:700;font-size:16px;color:var(--color-text-primary);line-height:1.25;white-space:nowrap;min-width:0;}
.brand>span{min-width:0;overflow:hidden;text-overflow:ellipsis;}
.brand:hover{text-decoration:none;}
.brand .mark{width:34px;height:34px;flex:none;}
.brand .sub{display:block;font-size:10px;color:var(--color-text-tertiary);font-weight:700;
  letter-spacing:.18em;}
.header-spacer{flex:1;}
.header-link{font-size:13px;color:var(--color-text-secondary);font-weight:700;white-space:nowrap;flex:none;
  padding:8px 16px;border-radius:var(--radius-full);transition:background .2s ease;}
.header-link:hover{background:var(--color-background-alt);text-decoration:none;}
@media(max-width:560px){
  .brand{font-size:14px;}
  .brand .sub{display:none;}
  .brand .mark{width:28px;height:28px;}
  .header-link{padding:8px 10px;}
}

/* ================= Hero ================= */
.hero{position:relative;overflow:hidden;background:#fff;border-bottom:1px solid var(--color-border);}
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;background:
  radial-gradient(640px 420px at 8% -10%,rgba(239,190,118,.20),transparent 62%),
  radial-gradient(720px 480px at 96% 6%,rgba(79,173,223,.18),transparent 60%),
  radial-gradient(560px 420px at 78% 108%,rgba(243,179,187,.16),transparent 62%),
  radial-gradient(460px 380px at 28% 112%,rgba(218,181,205,.18),transparent 62%);}
.hero .blob{position:absolute;border-radius:50%;filter:blur(54px);pointer-events:none;}
.hero .blob-a{width:300px;height:300px;right:-70px;top:-90px;
  background:rgba(79,173,223,.26);animation:drift 16s ease-in-out infinite;}
.hero .blob-b{width:240px;height:240px;left:-80px;bottom:-100px;
  background:rgba(239,190,118,.28);animation:drift2 19s ease-in-out infinite;}
.hero .sunwave{position:absolute;right:38px;bottom:-12px;width:300px;opacity:.5;pointer-events:none;}
.hero .inner{position:relative;padding:78px 0 60px;}
.hero .inner > *{animation:fadeUp .6s cubic-bezier(.25,.1,.25,1) both;}
.hero .inner > *:nth-child(2){animation-delay:.08s;}
.hero .inner > *:nth-child(3){animation-delay:.16s;}
.hero .inner > *:nth-child(4){animation-delay:.24s;}
.hero .eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:700;
  color:var(--color-text-secondary);background:rgba(255,255,255,.8);border:1px solid var(--color-border);
  border-radius:var(--radius-full);padding:6px 16px;box-shadow:var(--shadow-sm);margin:0 0 22px;
  letter-spacing:.08em;}
.hero .eyebrow .dot{width:8px;height:8px;border-radius:50%;background:var(--gradient-warm);flex:none;}
.hero h1{font-size:48px;line-height:1.28;margin:0 0 18px;max-width:720px;}
.hero h1 .grad{background:var(--gradient-text);-webkit-background-clip:text;
  background-clip:text;-webkit-text-fill-color:transparent;}
.hero p{font-size:17px;color:var(--color-text-secondary);margin:0 0 30px;max-width:560px;}
.hero .cta-row{display:flex;gap:14px;align-items:center;flex-wrap:wrap;margin-bottom:38px;}
.hero .stats{display:flex;gap:14px;flex-wrap:wrap;}
.stat-pill{display:flex;flex-direction:column;gap:2px;min-width:124px;
  background:rgba(255,255,255,.75);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  border:1px solid rgba(255,255,255,.95);border-radius:var(--radius-lg);
  padding:14px 22px;box-shadow:var(--shadow-md);}
.stat-pill .n{font-family:var(--font-mono);font-weight:700;font-size:28px;line-height:1.15;
  background:var(--gradient-text);-webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;}
.stat-pill .l{font-size:11px;font-weight:700;color:var(--color-text-tertiary);letter-spacing:.1em;}

/* ================= Section ================= */
.section{padding:56px 0 64px;}
.section h2{font-size:28px;margin:0 0 8px;display:flex;align-items:center;gap:12px;}
.section h2::before{content:"";width:10px;height:26px;border-radius:6px;
  background:var(--gradient-brand);flex:none;}
.section .lead{color:var(--color-text-secondary);font-size:15px;margin:0 0 30px;}

/* ================= Course cards ================= */
.course-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(300px,100%),1fr));gap:24px;}
.course-card{display:flex;flex-direction:column;background:var(--color-surface);
  border:1px solid var(--color-border);border-radius:var(--radius-lg);overflow:hidden;
  box-shadow:var(--shadow-sm);transition:box-shadow .25s ease,transform .25s ease,border-color .25s ease;
  color:inherit;position:relative;}
.course-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-3px);text-decoration:none;
  border-color:rgba(79,173,223,.45);}
.course-card .cover{position:relative;height:148px;display:flex;align-items:center;
  justify-content:center;background:var(--gradient-cool);overflow:hidden;}
.course-card:nth-child(3n+2) .cover{background:var(--gradient-warm);}
.course-card:nth-child(3n+3) .cover{background:linear-gradient(135deg,#DAB5CD,#A4B5DA);}
.course-card .cover::before{content:"";position:absolute;inset:0;background:
  linear-gradient(180deg,rgba(255,255,255,.30),rgba(255,255,255,.10)),
  radial-gradient(180px 110px at 82% 14%,rgba(255,255,255,.45),transparent 70%);}
.course-card .emoji-chip{position:relative;width:66px;height:66px;border-radius:var(--radius-xl);
  background:rgba(255,255,255,.94);display:flex;align-items:center;justify-content:center;
  font-size:34px;box-shadow:0 6px 18px rgba(26,26,46,.12);
  transition:transform .25s ease;}
.course-card:hover .emoji-chip{transform:scale(1.06) rotate(-3deg);}
.course-card .cover .wave{position:absolute;bottom:-1px;left:0;width:100%;height:22px;}
.course-card .body{padding:18px 22px 22px;display:flex;flex-direction:column;gap:8px;flex:1;}
.course-card h3{font-size:18px;margin:0;line-height:1.45;}
.course-card .ct-sub{font-size:13px;color:var(--color-text-secondary);margin:0;line-height:1.6;}
.course-card .meta{margin-top:auto;display:flex;align-items:center;gap:14px;
  font-size:12px;color:var(--color-text-tertiary);padding-top:8px;font-weight:600;}
.course-card .meta > span{display:inline-flex;align-items:center;gap:5px;}
.course-card .price{font-family:var(--font-mono);font-weight:700;color:var(--color-text-secondary);
  margin-left:auto;}

/* progress bar */
.progress{height:7px;border-radius:var(--radius-full);background:var(--color-background-alt);overflow:hidden;}
.progress > span{display:block;height:100%;width:0;background:var(--gradient-cool);
  border-radius:var(--radius-full);transition:width .5s cubic-bezier(.25,.1,.25,1);}
.progress-line{display:flex;align-items:center;gap:10px;font-size:12px;color:var(--color-text-tertiary);}
.progress-line .progress{flex:1;}
.progress-line .pct-label{font-family:var(--font-mono);font-weight:700;min-width:34px;text-align:right;}

/* ================= Badges ================= */
.badge{display:inline-flex;align-items:center;padding:3px 12px;border-radius:var(--radius-full);
  font-size:11px;font-weight:700;line-height:1.7;letter-spacing:.04em;}
.badge-main{background:var(--gradient-warm);color:var(--color-text-primary);}
.badge-info{background:var(--color-ocean-deep);color:#fff;}
.badge-soft{background:var(--color-background-alt);color:var(--color-text-secondary);}
.badge-free{background:var(--color-ocean-deep);color:#fff;}
.badge-lock{background:var(--color-background-alt);color:var(--color-text-secondary);}
.badge-done{background:var(--color-success-deep);color:#fff;}

/* ================= Buttons ================= */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:0;cursor:pointer;border-radius:var(--radius-md);padding:13px 28px;font-size:15px;
  font-weight:600;font-family:var(--font-body);text-decoration:none;transition:all .2s ease;}
.btn-primary{background:linear-gradient(135deg,#2179B5,#3490C4);color:#fff;box-shadow:var(--shadow-ocean);}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 4px 16px rgba(79,173,223,.4);text-decoration:none;}
.btn-secondary{background:#fff;color:var(--color-ocean-deep);border:1.5px solid var(--color-ocean-deep);
  box-shadow:var(--shadow-sm);}
.btn-secondary:hover{background:var(--tint-ocean);text-decoration:none;transform:translateY(-1px);}
.btn-ghost{background:var(--color-background-alt);color:var(--color-text-secondary);}
.btn-ghost:hover{background:#e3e9f1;text-decoration:none;}
.btn:disabled{opacity:.5;cursor:not-allowed;}

/* ================= Breadcrumb ================= */
.crumb{font-size:13px;color:var(--color-text-tertiary);padding:20px 0 0;}
.crumb a{color:var(--color-text-secondary);font-weight:600;}
.crumb .sep{margin:0 9px;opacity:.55;}

/* ================= Course detail ================= */
.course-head{display:flex;gap:28px;align-items:flex-start;flex-wrap:wrap;padding:30px 0 8px;}
.course-head .ch-cover{position:relative;width:108px;height:108px;border-radius:20px;
  background:var(--gradient-cool);display:flex;align-items:center;justify-content:center;
  font-size:50px;flex:none;box-shadow:0 8px 24px rgba(79,173,223,.25);
  transform:rotate(-4deg);}
.course-head .ch-cover::before{content:"";position:absolute;inset:0;border-radius:20px;
  background:radial-gradient(90px 60px at 78% 18%,rgba(255,255,255,.5),transparent 70%);}
.course-head h1{font-size:32px;margin:0 0 8px;line-height:1.32;}
.course-head .desc{color:var(--color-text-secondary);font-size:15px;margin:0;max-width:680px;}
.course-head .tags{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:12px;}

.section-block{margin:28px 0;background:var(--color-surface);border:1px solid var(--color-border);
  border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm);}
.section-block > .sb-title{padding:16px 24px;font-family:var(--font-heading);font-weight:700;
  font-size:15px;background:linear-gradient(180deg,#fbfcff,#f3f6fb);
  border-bottom:1px solid var(--color-border);display:flex;align-items:center;gap:12px;}
.section-block > .sb-title::before{content:"";width:8px;height:20px;border-radius:5px;
  background:var(--gradient-brand);flex:none;}
.section-block .sb-count{font-size:12px;color:var(--color-text-tertiary);font-weight:700;
  margin-left:auto;font-family:var(--font-mono);}
.lesson-row{display:flex;align-items:center;gap:16px;padding:16px 24px;
  border-bottom:1px solid var(--color-border);color:inherit;
  transition:background .18s ease,box-shadow .18s ease;position:relative;}
.lesson-row:last-child{border-bottom:0;}
.lesson-row:hover{background:var(--tint-ocean);text-decoration:none;
  box-shadow:inset 3px 0 0 var(--color-ocean);}
.lesson-row .num{width:30px;height:30px;border-radius:50%;background:var(--color-background-alt);
  display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;
  color:var(--color-text-secondary);flex:none;font-family:var(--font-mono);
  transition:all .2s ease;}
.lesson-row.is-done .num{background:var(--color-success-deep);color:#fff;}
.lesson-row .lr-body{flex:1;min-width:0;}
.lesson-row .lr-title{font-size:15px;font-weight:700;margin:0;white-space:nowrap;
  overflow:hidden;text-overflow:ellipsis;}
.lesson-row .lr-sub{font-size:12px;color:var(--color-text-tertiary);margin:3px 0 0;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.lesson-row .lr-right{display:flex;align-items:center;gap:10px;flex:none;}
.lesson-row .dur{font-size:12px;color:var(--color-text-tertiary);font-family:var(--font-mono);
  font-weight:600;}
@media(max-width:560px){
  .lesson-row .lr-sub{white-space:normal;display:-webkit-box;-webkit-line-clamp:2;
    -webkit-box-orient:vertical;overflow:hidden;}
}

/* ================= Lesson player page ================= */
.player-frame{padding:2px;border-radius:var(--radius-xl);background:var(--gradient-brand);
  box-shadow:0 12px 32px -10px rgba(79,173,223,.35),0 4px 14px rgba(26,26,46,.08);}
.player-wrap{position:relative;width:100%;padding-top:56.25%;background:#0b1020;
  border-radius:14px;overflow:hidden;}
.player-wrap iframe{position:absolute;inset:0;width:100%;height:100%;border:0;}
.player-empty{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;
  justify-content:center;gap:10px;color:#cbd5e1;text-align:center;padding:24px;background:#0b1020;}
.player-empty .em-emoji{font-size:42px;}
.player-empty code{background:rgba(255,255,255,.1);padding:2px 8px;border-radius:6px;color:#fff;}

.lesson-main{padding:28px 0 72px;}
.lesson-title{font-size:28px;margin:26px 0 8px;line-height:1.35;}
.lesson-meta{display:flex;align-items:center;gap:12px;color:var(--color-text-tertiary);
  font-size:13px;margin-bottom:20px;flex-wrap:wrap;font-weight:600;}
.lesson-meta > span{display:inline-flex;align-items:center;gap:5px;}
.lesson-summary{color:var(--color-text-secondary);font-size:15px;background:var(--color-surface);
  border:1px solid var(--color-border);border-left:4px solid var(--color-ocean);
  border-radius:var(--radius-md);padding:16px 20px;margin:0 0 24px;box-shadow:var(--shadow-sm);}
.lesson-nav{display:flex;justify-content:space-between;gap:12px;margin-top:30px;flex-wrap:wrap;}
.lesson-nav .spacer{flex:1;}

.complete-bar{display:flex;align-items:center;gap:16px;flex-wrap:wrap;
  background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);
  padding:16px 22px;margin:24px 0;box-shadow:var(--shadow-md);}
@property --p{syntax:"<number>";inherits:false;initial-value:0;}
.watch-ring{--p:0;width:44px;height:44px;border-radius:50%;flex:none;position:relative;
  background:conic-gradient(var(--color-ocean-deep) calc(var(--p)*1%),var(--color-background-alt) 0);
  transition:--p .4s ease;}
.watch-ring::after{content:"";position:absolute;inset:5px;border-radius:50%;background:#fff;}
.watch-ring .ring-icon{position:absolute;inset:0;display:flex;align-items:center;
  justify-content:center;font-size:15px;z-index:1;}
.complete-bar.done .watch-ring{background:conic-gradient(var(--color-success-deep) 100%,transparent 0);}
.complete-bar .status{display:flex;flex-direction:column;gap:1px;font-weight:700;font-size:14px;}
.complete-bar .pct{font-family:var(--font-mono);font-weight:700;font-size:12px;
  color:var(--color-text-tertiary);}
.complete-bar.done .status .label{color:var(--color-success-deep);}

.resources{margin:24px 0;}
.resources h3{font-size:15px;margin:0 0 10px;}
.resources ul{margin:0;padding-left:18px;}
.resources li{font-size:14px;margin:4px 0;}

/* sidebar curriculum */
.lesson-layout{display:grid;grid-template-columns:1fr 320px;gap:32px;align-items:start;}
.curriculum-aside{background:var(--color-surface);border:1px solid var(--color-border);
  border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);overflow:hidden;position:sticky;top:80px;
  max-height:calc(100vh - 100px);overflow-y:auto;}
.curriculum-aside .ca-head{padding:15px 20px;font-family:var(--font-heading);font-weight:700;
  font-size:13px;background:linear-gradient(180deg,#fbfcff,#f3f6fb);
  border-bottom:1px solid var(--color-border);display:flex;align-items:center;gap:7px;}
.ca-section-title{padding:14px 20px 6px;font-size:11px;font-weight:700;color:var(--color-text-tertiary);
  letter-spacing:.08em;}
.ca-lesson{display:flex;align-items:center;gap:11px;padding:10px 20px;font-size:13px;
  color:var(--color-text-secondary);transition:background .15s ease;}
.ca-lesson:hover{background:var(--tint-ocean);text-decoration:none;}
.ca-lesson.active{background:linear-gradient(90deg,rgba(79,173,223,.12),rgba(79,173,223,.03));
  color:var(--color-text-primary);font-weight:700;box-shadow:inset 3px 0 0 var(--color-ocean);}
.ca-lesson .tick{width:19px;height:19px;border-radius:50%;border:1.5px solid var(--color-border);
  flex:none;display:flex;align-items:center;justify-content:center;font-size:11px;color:transparent;
  transition:all .2s ease;}
.ca-lesson.is-done .tick{background:var(--color-success-deep);border-color:var(--color-success-deep);color:#fff;}

/* ================= Footer ================= */
.site-footer{position:relative;background:var(--color-surface);padding:0 0 64px;margin-top:48px;}
.site-footer .wave-top{display:block;width:100%;height:44px;margin-bottom:26px;}
.site-footer .cols{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;
  font-size:13px;color:var(--color-text-secondary);align-items:flex-start;}
.site-footer .foot-brand{display:flex;align-items:center;gap:10px;font-family:var(--font-heading);
  font-weight:700;font-size:15px;color:var(--color-text-primary);margin-bottom:6px;}
.site-footer .foot-brand .mark{width:26px;height:26px;}
.site-footer .links{text-align:right;}
.site-footer .links a{display:inline-block;padding:7px 0;color:var(--color-text-secondary);font-weight:600;}

.empty-note{background:rgba(239,190,118,.12);border:1px solid rgba(239,190,118,.5);
  color:var(--color-text-secondary);border-radius:var(--radius-md);
  padding:12px 16px;font-size:13px;margin:18px 0;}

/* ================= Responsive ================= */
@media(max-width:1023px){
  .lesson-layout{grid-template-columns:1fr;}
  .curriculum-aside{position:static;max-height:none;}
}
@media(max-width:860px){
  .hero h1{font-size:33px;}
  .hero .sunwave{width:200px;right:-30px;opacity:.3;}
}
@media(max-width:560px){
  .wrap,.wrap-narrow{padding:0 18px;}
  .hero .inner{padding:52px 0 42px;}
  .hero h1{font-size:27px;}
  .hero .sunwave{display:none;}
  .stat-pill{min-width:0;flex:1;padding:12px 16px;}
  .stat-pill .n{font-size:22px;}
  .course-head .ch-cover{width:80px;height:80px;font-size:38px;border-radius:var(--radius-xl);}
  .lesson-row{padding:14px 16px;}
  .section-block > .sb-title{padding:14px 16px;}
}

/* ---- 認証（ヘッダーのログイン状態 / 会員ゲート） ---- */
.header-nav{display:flex;align-items:center;gap:8px;flex:none;white-space:nowrap;}
.header-login{display:inline-flex;align-items:center;gap:6px;color:#fff;background:#5865F2;}
.header-login:hover{background:#4752c4;text-decoration:none;}
.header-login .ico{width:15px;height:15px;}
.header-user{display:inline-flex;align-items:center;gap:7px;font-size:13px;font-weight:700;color:var(--color-text-secondary);max-width:170px;}
.header-user .hu-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.header-avatar{border-radius:50%;flex:none;}
.btn-discord{background:#5865F2;color:#fff;}
.btn-discord:hover{background:#4752c4;color:#fff;text-decoration:none;transform:translateY(-1px);}
.btn-discord .ico{width:18px;height:18px;}
.player-locked .pl-sub{font-size:13px;opacity:.85;max-width:380px;line-height:1.6;margin-top:2px;}
.player-locked .btn-discord{margin-top:14px;}
.player-locked .pl-note{margin-top:12px;font-size:12px;opacity:.7;border:1px solid rgba(255,255,255,.18);border-radius:var(--radius-full);padding:5px 14px;}
/* コミュニティ学習統計（D1） */
.community-stats{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--color-text-secondary);background:var(--tint-ocean);border:1px solid var(--color-ocean-deep);border-radius:var(--radius-full);padding:7px 15px;margin:2px 0 16px;}
.community-stats b{color:var(--color-ocean-deep);font-weight:800;}
@media(max-width:560px){
  .header-nav{gap:6px;}
  .header-user .hu-name{display:none;}
  .header-user{gap:0;}
  .hl-label{display:none;}
  /* スマホは冗長なので「コース一覧」リンクは隠す（ロゴがトップ＝コース一覧へのリンク） */
  .header-nav a[href="/"]{display:none;}
}

/* ===== モバイル横はみ出し対策（Codexレビュー反映） ===== */
img,video,iframe{max-width:100%;}
.wrap,.wrap-narrow{width:100%;}
html,body{max-width:100%;overflow-x:clip;}
@supports not (overflow-x:clip){html,body{overflow-x:hidden;}}
.lesson-layout{grid-template-columns:minmax(0,1fr) 320px;}
.lesson-layout>*{min-width:0;}
.curriculum-aside{min-width:0;width:100%;}
.crumb,.lesson-title,.lesson-summary,.resources,.resources a,.course-card h3,.course-card .ct-sub,.course-head h1,.course-head .desc,.ca-head,.ca-section-title{overflow-wrap:anywhere;}
.player-empty,.player-empty code,.player-locked .pl-note{max-width:100%;overflow-wrap:anywhere;}
.player-empty code{white-space:normal;}
@media(max-width:1023px){.lesson-layout{grid-template-columns:minmax(0,1fr);}}
@media(max-width:560px){
  .lesson-row{display:grid;grid-template-columns:30px minmax(0,1fr);column-gap:12px;row-gap:8px;align-items:start;}
  .lesson-row .lr-body{min-width:0;}
  .lesson-row .lr-title{white-space:normal;}
  .lesson-row .lr-right{grid-column:2;display:flex;flex-wrap:wrap;justify-content:flex-start;gap:6px 8px;min-width:0;width:100%;}
  .complete-bar{padding:14px 16px;gap:12px;flex-wrap:wrap;}
  .complete-bar .spacer,.lesson-nav .spacer{display:none;}
  .complete-bar .btn,.lesson-nav .btn{width:100%;}
  .lesson-nav{display:grid;grid-template-columns:1fr;gap:10px;}
  .community-stats{display:flex;width:100%;flex-wrap:wrap;white-space:normal;align-items:flex-start;border-radius:var(--radius-md);}
}