:root{--navy:#07182f;--navy2:#0d2e57;--blue:#2577ff;--cyan:#70e2ec;--paper:#f1f6fc;--white:#fff;--ink:#10203a;--muted:#64748b;--line:#dbe5f0;--shadow:0 20px 60px rgba(9,35,70,.12)}
*{box-sizing:border-box}[hidden]{display:none!important}html{font-size:16px}body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Hiragino Sans","Yu Gothic",sans-serif;line-height:1.7}button,input,textarea{font:inherit}button{cursor:pointer}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.login-shell{min-height:100vh;display:grid;place-items:center;padding:24px;background:radial-gradient(circle at 75% 20%,rgba(37,119,255,.34),transparent 34%),linear-gradient(145deg,#07182f,#0a2b53)}.login-card{width:min(100%,460px);padding:42px;background:#fff;border:1px solid rgba(255,255,255,.25);border-radius:12px;box-shadow:0 30px 90px rgba(0,0,0,.35)}.course-mark{display:inline-grid;place-items:center;min-width:76px;height:40px;padding:0 14px;background:var(--blue);color:#fff;border-radius:8px;font-weight:900}.eyebrow{margin:22px 0 4px;color:#2466c1;font-size:.82rem;font-weight:900}.login-card h1{font-size:2.3rem;line-height:1.2;margin:.15em 0}.login-card p{color:var(--muted)}label{display:block;font-weight:800;margin:22px 0 6px}input,textarea{width:100%;border:1px solid #b9c8d9;border-radius:10px;padding:13px;background:#fff;color:var(--ink)}input:focus,textarea:focus,button:focus-visible,a:focus-visible{outline:3px solid rgba(37,119,255,.28);outline-offset:2px}.login-card button,.chat-form button{width:100%;min-height:50px;margin-top:14px;border:0;border-radius:10px;background:var(--blue);color:#fff;font-weight:900}.error{min-height:1.5em;color:#b42318!important;font-weight:700}
.topbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:68px;padding:0 max(22px,calc((100vw - 1440px)/2));background:#fff;border-bottom:1px solid var(--line)}.logo{display:flex;align-items:center;gap:11px;color:var(--ink);text-decoration:none}.logo span{padding:6px 10px;border-radius:7px;background:var(--blue);color:#fff;font-size:.82rem;font-weight:950}.top-actions{display:flex;align-items:center;gap:18px;color:var(--muted);font-size:.86rem;font-weight:800}.text-button{padding:7px 0;border:0;background:none;color:#315d94;font-weight:800}.progress-track{position:sticky;top:68px;z-index:20;height:4px;background:#e7edf5}.progress-track span{display:block;width:0;height:100%;background:linear-gradient(90deg,var(--blue),var(--cyan));transition:width .25s ease}
.workspace{width:min(calc(100% - 36px),1440px);margin:36px auto;display:grid;grid-template-columns:minmax(0,1fr) minmax(340px,460px);gap:28px;align-items:start}.learning-panel,.coach{background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:0 1px 3px rgba(0,0,0,.06)}.learning-panel{overflow:hidden}.welcome{padding:42px;background:radial-gradient(circle at 85% 20%,rgba(112,226,236,.16),transparent 32%),linear-gradient(135deg,var(--navy),var(--navy2));color:#fff}.welcome .eyebrow{color:#8ee8ef;margin-top:0}.welcome h1{margin:.1em 0 .3em;font-size:clamp(2.4rem,5vw,4.4rem);line-height:1.08;letter-spacing:-.045em}.welcome p:last-child{max-width:650px;color:#c8d8ea}.chapters{padding:20px}.chapter{display:grid;grid-template-columns:auto 1fr auto;gap:16px;align-items:center;padding:18px 16px;border-bottom:1px solid var(--line)}.chapter:last-child{border-bottom:0}.chapter input{appearance:none;width:25px;height:25px;margin:0;border:2px solid #97abc1;border-radius:7px;display:grid;place-items:center}.chapter input:checked{background:var(--blue);border-color:var(--blue)}.chapter input:checked:after{content:"✓";color:#fff;font-weight:950;line-height:1}.chapter:has(input:checked) h3{text-decoration:line-through;color:#7b8ba0}.chapter a{display:block;color:inherit;text-decoration:none}.chapter a:hover h3{color:var(--blue)}.chapter small{color:#2470d7;font-weight:900}.chapter h3{margin:0;font-size:1rem;line-height:1.45}.chapter a b{display:inline-block;margin-top:5px;color:#2568bd;font-size:.76rem}.chapter span{font-size:.78rem;color:var(--muted)}
.coach{position:sticky;top:94px;overflow:hidden}.coach-head{display:flex;align-items:center;gap:12px;padding:18px;border-bottom:1px solid var(--line)}.coach-avatar{display:grid;place-items:center;width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--blue),#174a9b);color:#fff;font-weight:950}.coach-head p,.coach-head h2{margin:0}.coach-head p{font-size:.73rem;color:var(--muted);font-weight:800}.coach-head h2{font-size:1.08rem}.status{margin-left:auto;padding:4px 8px;border-radius:6px;background:#e9f9f3;color:#087a52;font-size:.72rem;font-weight:900}.messages{height:min(43vh,500px);min-height:320px;overflow:auto;padding:18px;background:#f8fbff}.message{width:fit-content;max-width:90%;margin-bottom:12px;padding:12px 14px;border-radius:12px;white-space:pre-wrap}.message.assistant{background:#fff;border:1px solid var(--line);border-top-left-radius:3px}.message.user{margin-left:auto;background:var(--blue);color:#fff;border-top-right-radius:3px}.message.loading{color:var(--muted)}.quick-questions{display:flex;gap:7px;overflow:auto;padding:12px 16px 0}.quick-questions button{flex:0 0 auto;padding:7px 10px;border:1px solid #b8cef0;border-radius:7px;background:#fff;color:#255995;font-size:.76rem;font-weight:800}.chat-form{padding:14px 16px}.chat-form textarea{resize:none}.coach-note{margin:0;padding:0 16px 16px;color:var(--muted);font-size:.75rem}.coach-note a{color:#1e64bf;font-weight:800}
@media(max-width:900px){.workspace{grid-template-columns:1fr}.coach{position:relative;top:auto}.messages{height:420px}.topbar{padding:0 16px}}
@media(max-width:540px){.login-shell{padding:8px}.login-card{padding:30px 20px}.topbar{min-height:64px}.logo b{display:none}.top-actions{gap:10px}.top-actions span{font-size:.74rem}.progress-track{top:64px}.workspace{width:calc(100% - 16px);margin:8px auto;gap:12px}.welcome{padding:30px 18px}.welcome h1{font-size:2.65rem}.chapters{padding:6px 12px}.chapter{grid-template-columns:auto 1fr;gap:12px;padding:15px 4px}.chapter>span{grid-column:2}.coach{border-radius:12px}.messages{height:360px}.quick-questions{padding-left:12px}.chat-form{padding:12px}.login-card h1{font-size:2rem}}
@media(prefers-reduced-motion:reduce){.progress-track span{transition:none}}
.course-loading{min-height:100vh;display:grid;place-items:center;color:var(--muted);font-weight:800}.lesson{padding:40px 48px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:0 1px 3px rgba(0,0,0,.06)}.lesson-content h2{margin:2.2em 0 .7em;padding-top:1.2em;border-top:1px solid var(--line);font-size:1.65rem;line-height:1.4}.lesson-content h3{margin:1.8em 0 .5em;font-size:1.25rem}.lesson-content p,.lesson-content li{color:#3e5068}.lesson-content li{margin:.55em 0}.lesson-content blockquote{margin:24px 0;padding:16px 20px;border-left:4px solid var(--blue);background:#eef5ff;color:#27496f}.lesson-content code{padding:.15em .35em;border-radius:4px;background:#eef2f7}.table-wrap{overflow:auto;margin:22px 0}.lesson-content table{width:100%;border-collapse:collapse;min-width:560px}.lesson-content th,.lesson-content td{padding:11px;border:1px solid var(--line);text-align:left}.lesson-content th{background:#eff5fc}.lesson-complete{margin-top:50px;padding:24px;background:#eef6ff;border:1px solid #c8dcf5;border-radius:12px}.lesson-complete button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 20px;border:0;border-radius:9px;background:var(--blue);color:#fff;font-weight:900}.lesson-complete button.done{background:#16805f}.lesson-nav{display:flex;justify-content:space-between;gap:16px;margin-top:34px}.lesson-nav a{color:#2866b1;font-weight:900;text-decoration:none}

/* 2026-09 learning experience refresh */
.welcome{position:relative;display:grid;grid-template-columns:minmax(0,1.2fr) minmax(270px,.8fr);min-height:440px;padding:0;overflow:hidden;background:linear-gradient(125deg,#06162d 0%,#0a2b55 58%,#124d80 100%)}.welcome:after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(112,226,236,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(112,226,236,.055) 1px,transparent 1px);background-size:48px 48px;pointer-events:none}.welcome-copy{position:relative;z-index:2;padding:52px 0 50px 48px}.welcome h1 em{color:#70e2ec;font-style:normal}.welcome-copy>p:last-of-type{font-size:1.02rem}.welcome-meta{display:flex;flex-wrap:wrap;gap:9px;margin:24px 0}.welcome-meta span{padding:6px 10px;border:1px solid rgba(143,209,241,.35);border-radius:7px;background:rgba(255,255,255,.065);font-size:.76rem;font-weight:800;color:#dbeafa}.primary-link{display:inline-flex;align-items:center;justify-content:center;min-height:52px;padding:0 24px;border-radius:9px;background:#fff;color:#0b3260;text-decoration:none;font-weight:950;box-shadow:0 12px 30px rgba(0,0,0,.18)}.welcome-teacher{position:relative;min-height:440px;overflow:hidden}.welcome-teacher img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:25% center;mask-image:linear-gradient(90deg,transparent 0%,#000 28%)}.chapter{border-radius:10px;transition:background .18s ease,transform .18s ease}.chapter:hover{background:#f6f9fd;transform:translateY(-1px)}
.course-body{background:#eef3f9}.header-link{color:#285e9e;text-decoration:none;font-weight:900}.course-studio{width:min(calc(100% - 32px),1680px);margin:24px auto 60px;display:grid;grid-template-columns:260px minmax(0,860px) minmax(300px,380px);gap:22px;align-items:start}.curriculum,.course-coach{position:sticky;top:94px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:0 1px 3px rgba(0,0,0,.05);overflow:hidden}.curriculum-head{padding:20px;border-bottom:1px solid var(--line)}.curriculum-head small{display:block;color:#3572bc;font-size:.68rem;font-weight:950;letter-spacing:.12em}.curriculum-head strong{display:block;margin-top:4px}.curriculum nav{max-height:calc(100vh - 180px);overflow:auto;padding:8px}.curriculum-item{display:grid;grid-template-columns:32px 1fr;gap:10px;align-items:center;padding:10px;border-radius:8px;color:var(--ink);text-decoration:none}.curriculum-item>span{display:grid;place-items:center;width:30px;height:30px;border-radius:7px;background:#edf3fa;color:#5b6e86;font-size:.7rem;font-weight:950}.curriculum-item small,.curriculum-item strong{display:block}.curriculum-item small{color:#6b7d92;font-size:.64rem}.curriculum-item strong{font-size:.76rem;line-height:1.38}.curriculum-item.current{background:#eaf3ff}.curriculum-item.current>span{background:var(--blue);color:#fff}.curriculum-item.completed>span{background:#e5f7f0;color:#087a52}.course-studio .lesson{padding:30px 38px}.lesson-breadcrumb{display:flex;gap:8px;align-items:center;margin-bottom:22px;color:#73849a;font-size:.75rem;font-weight:800}.lesson-breadcrumb a{color:#2866b1;text-decoration:none}.video-lesson{margin-bottom:34px;padding:16px;border-radius:14px;background:#071a36;color:#fff;box-shadow:0 18px 50px rgba(7,24,47,.22)}.video-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:3px 4px 14px}.video-heading h2{margin:4px 0 0;font-size:1.05rem}.teacher-label{color:#70e2ec;font-size:.7rem;font-weight:950}.video-time{padding:5px 8px;border:1px solid rgba(255,255,255,.2);border-radius:6px;color:#cbdcf0;font-size:.7rem;font-weight:800}.video-lesson video{display:block;width:100%;aspect-ratio:16/9;border-radius:9px;background:#041226}.voice-credit{margin:10px 4px 0;color:#9db2cd;font-size:.68rem}.lesson-title-block{padding:12px 0 28px;border-bottom:1px solid var(--line)}.lesson-title-block .eyebrow{margin-top:0}.lesson-title-block h1{margin:.1em 0 .5em;font-size:clamp(2.2rem,4vw,3.55rem);line-height:1.16;letter-spacing:-.04em}.lesson-points{display:flex;flex-wrap:wrap;gap:8px}.lesson-points span{padding:5px 9px;border-radius:6px;background:#eef5ff;color:#275d9e;font-size:.72rem;font-weight:850}.course-studio .lesson-content{font-size:1.01rem}.lesson-complete{display:flex;align-items:center;justify-content:space-between;gap:20px}.lesson-complete small,.lesson-complete strong{display:block}.lesson-complete small{margin-bottom:5px;color:#2470d7;font-size:.66rem;font-weight:950;letter-spacing:.08em}.lesson-complete strong{max-width:430px}.lesson-complete button{flex:0 0 auto}.course-coach .messages.compact{height:min(43vh,440px);min-height:260px}.teacher-mini{display:grid;place-items:center;width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,#dbeafe,#8ec5ef);color:#103968;font-size:.68rem;font-weight:950}.course-coach .chat-form button{width:100%;min-height:48px;margin-top:10px;border:0;border-radius:9px;background:var(--blue);color:#fff;font-weight:900}
.lesson-content .course-step-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:2.2em 0 .9em;padding:20px 0 14px;border-top:1px solid var(--line);border-bottom:1px solid transparent}.course-step-heading>span{min-width:0}.step-check{flex:0 0 auto;min-height:42px;padding:0 15px;border:1px solid #9ebce2;border-radius:9px;background:#fff;color:#235d9f;font-size:.78rem;font-weight:950}.step-check:hover{background:#edf5ff}.course-step-heading.step-current{margin-top:2.5em;padding:22px 20px;border:1px solid #b8d2f2;border-radius:12px;background:#f2f7ff;box-shadow:0 10px 28px rgba(37,119,255,.08)}.course-step-heading.step-current:before{content:"今ここ";flex:0 0 auto;padding:4px 7px;border-radius:5px;background:var(--blue);color:#fff;font-size:.65rem;font-weight:950}.course-step-heading.step-done{margin:12px 0;padding:13px 16px;border:1px solid #cae7dc;border-radius:10px;background:#f2fbf7;color:#315d50;cursor:pointer}.course-step-heading.step-done>span{font-size:1rem}.step-check.checked{border-color:#99d2bb;background:#e4f6ee;color:#087a52}.lesson-complete button:disabled{cursor:not-allowed;background:#a9b6c7;color:#edf2f7;box-shadow:none}
@media(max-width:1250px){.course-studio{grid-template-columns:220px minmax(0,1fr)}.course-coach{grid-column:2;position:static}.course-coach .messages.compact{height:320px}.curriculum{grid-row:1/3}}
@media(max-width:900px){.welcome{grid-template-columns:1fr;min-height:520px}.welcome-copy{padding:42px 32px 250px}.welcome-teacher{position:absolute;inset:auto 0 0;height:280px;min-height:0}.welcome-teacher img{object-position:35% 34%;mask-image:linear-gradient(180deg,transparent 0%,#000 45%)}.course-studio{grid-template-columns:1fr;width:min(calc(100% - 20px),860px);margin-top:10px}.curriculum{position:static;grid-row:auto}.curriculum nav{display:flex;gap:6px;overflow:auto;padding:10px;max-height:none}.curriculum-item{flex:0 0 190px}.course-coach{grid-column:auto}.course-studio .lesson{padding:28px 24px}}
@media(max-width:540px){.welcome-copy{padding:30px 18px 230px}.welcome{min-height:540px}.welcome-meta{margin:18px 0}.primary-link{width:100%}.course-studio{width:calc(100% - 12px);gap:10px}.curriculum-head{padding:14px}.course-studio .lesson{padding:20px 15px}.video-lesson{margin:0 -5px 26px;padding:8px}.video-heading{align-items:flex-end}.video-heading h2{font-size:.88rem}.lesson-title-block h1{font-size:2.1rem}.lesson-points{gap:5px}.lesson-complete{align-items:stretch;flex-direction:column}.lesson-complete button{width:100%}.course-coach .messages.compact{height:300px}.lesson-content .course-step-heading{align-items:flex-start;flex-wrap:wrap;padding:17px 14px}.course-step-heading.step-current:before{order:-1}.course-step-heading>span{flex:1 1 calc(100% - 80px);font-size:1.18rem}.step-check{width:100%}}
.lesson-lab{margin:0 0 38px;padding:22px;border:1px solid #c8d8ec;border-radius:18px;background:linear-gradient(145deg,#f7fbff,#eaf3ff);box-shadow:0 14px 34px rgba(16,57,99,.1)}
.lab-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:16px}.lab-heading small{font-weight:800;color:#1976d2;letter-spacing:.12em}.lab-heading h2{margin:3px 0 0!important;font-size:clamp(21px,3vw,30px)!important;border:0!important;padding:0!important}.lab-heading>span{padding:7px 11px;border-radius:8px;background:#0a1830;color:#6fe4ef;font:700 12px/1.2 ui-monospace,SFMono-Regular,monospace;letter-spacing:.08em}
.plugin-shell{overflow:hidden;border:1px solid #314764;border-radius:12px;background:linear-gradient(180deg,#172842,#0b1424);color:#fff;box-shadow:inset 0 1px rgba(255,255,255,.08),0 8px 18px rgba(2,13,29,.18)}.plugin-top{display:flex;align-items:center;gap:6px;padding:9px 12px;background:#253850;border-bottom:1px solid #3c526c}.plugin-top i{width:9px;height:9px;border-radius:50%;background:#f26c61}.plugin-top i:nth-child(2){background:#f5c451}.plugin-top i:nth-child(3){background:#52c77b}.plugin-top strong{margin-left:7px;font:700 12px/1 ui-monospace,SFMono-Regular,monospace;color:#c9d9eb;letter-spacing:.08em}
.plugin-controls{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;padding:22px 16px}.plugin-control{text-align:center;min-width:0}.plugin-control small{display:block;margin:8px 0 4px;color:#92a9c2;font-size:11px;font-weight:800;letter-spacing:.05em}.plugin-control>strong{display:block;color:#f4f9ff;font-size:13px;line-height:1.45}.knob{position:relative;width:62px;height:62px;margin:auto;border-radius:50%;background:radial-gradient(circle at 35% 30%,#506780,#182436 60%,#050a11 63%);border:2px solid #5d7289;box-shadow:0 4px 10px #02060c}.knob b{position:absolute;left:29px;top:5px;width:4px;height:22px;border-radius:3px;background:#67dfec;transform-origin:2px 26px}.k1 b{transform:rotate(-48deg)}.k2 b{transform:rotate(-15deg)}.k3 b{transform:rotate(24deg)}.k4 b{transform:rotate(55deg)}
.signal-flow{display:flex;align-items:stretch;justify-content:center;gap:8px;padding:14px;border-top:1px solid #30445d;background:#0f1c2e}.signal-flow div{display:flex;align-items:center;justify-content:center;gap:6px;flex:1;padding:10px 8px;border:1px solid #37516f;border-radius:8px;background:#172a43;color:#e5f1ff;font-size:12px;font-weight:700;text-align:center}.signal-flow div span{display:grid;place-items:center;flex:0 0 22px;height:22px;border-radius:50%;background:#2d82ee;color:#fff}.signal-flow>b{align-self:center;color:#65dce9}.lab-pass{display:flex;gap:10px;margin:14px 0 0!important;padding:12px 14px;border-left:4px solid #28a96b;border-radius:8px;background:#fff;color:#233a53}.lab-pass strong{white-space:nowrap;color:#16824f}
.action-recipe{margin-top:16px;padding:16px;border:1px solid #d4e2f1;border-radius:12px;background:#fff}.action-recipe h3{margin:0 0 12px!important;font-size:17px!important;color:#102943}.action-recipe ol{counter-reset:recipe;display:grid;gap:9px;margin:0!important;padding:0!important;list-style:none}.action-recipe li{counter-increment:recipe;position:relative;margin:0!important;padding:10px 12px 10px 46px;border-radius:8px;background:#f2f7fc;color:#263e56;line-height:1.65}.action-recipe li::before{content:counter(recipe);position:absolute;left:12px;top:11px;display:grid;place-items:center;width:24px;height:24px;border-radius:50%;background:#2379d8;color:#fff;font-size:12px;font-weight:800}
@media(max-width:700px){.lesson-lab{padding:14px}.lab-heading{align-items:flex-start}.plugin-controls{grid-template-columns:repeat(2,1fr)}.signal-flow{display:grid;grid-template-columns:1fr 1fr}.signal-flow>b{display:none}.lab-pass{display:block}.lab-pass strong{display:block;margin-bottom:4px}}
.ear-lab{margin:0 0 24px;padding:24px;border:2px solid #83b8f5;border-radius:18px;background:linear-gradient(145deg,#071a36,#0c3562);color:#fff;box-shadow:0 16px 36px rgba(7,35,73,.18)}.ear-lab h2{margin:3px 0 8px!important;padding:0!important;border:0!important;color:#fff;font-size:clamp(21px,3vw,30px)!important}.lab-kicker{margin:0!important;color:#70e2ec!important;font-size:.75rem;font-weight:950;letter-spacing:.12em}.ear-guide{color:#cfe0f2!important}.ear-guide strong{color:#fff}.ear-players,.ear-actions{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:16px}.ear-players button{display:flex;align-items:center;gap:12px;min-height:64px;padding:10px 16px;border:1px solid #52789f;border-radius:12px;background:#102d4f;color:#fff;text-align:left}.ear-players button span{display:grid;place-items:center;width:38px;height:38px;border-radius:50%;background:#2577ff;font-size:1.1rem;font-weight:950}.ear-players button b{font-size:.9rem}.ear-actions button{min-height:46px;border:1px solid #8ab5e3;border-radius:9px;background:#fff;color:#113863;font-weight:900}.ear-result{margin-top:14px;padding:14px;border-radius:10px}.ear-result strong,.ear-result p{display:block;margin:0!important}.ear-result.correct{background:#dff8ed;color:#075f42}.ear-result.correct p{color:#16624c!important}.ear-result.retry{background:#fff2d8;color:#744800}.ear-result.retry p{color:#744800!important}.practice-check{display:flex;align-items:flex-start;gap:10px;margin:16px 0 0;padding:13px;border:1px solid rgba(255,255,255,.2);border-radius:10px;background:rgba(255,255,255,.07);color:#fff}.practice-check input{flex:0 0 22px;width:22px;height:22px;margin:2px 0 0}.download-pack{display:inline-flex;align-items:center;justify-content:center;margin-top:14px;min-height:48px;padding:0 18px;border-radius:9px;background:#70e2ec;color:#072347!important;text-decoration:none;font-weight:950}.download-pack.small{min-height:38px;background:transparent;border:1px solid #6fb5d5;color:#dff8ff!important;font-size:.78rem}.ear-lab-intro{background:linear-gradient(145deg,#0b2e56,#185f8a)}
@media(max-width:540px){.ear-lab{padding:18px 14px}.ear-players,.ear-actions{grid-template-columns:1fr}.ear-players button{min-height:56px}}
.checkpoint,.final-exam{margin:24px 0;padding:22px;border:1px solid #c5d8ec;border-radius:16px;background:#f6faff}.checkpoint h2,.final-exam h2{margin:4px 0 14px!important;padding:0!important;border:0!important}.checkpoint summary{cursor:pointer;padding:12px;border-radius:9px;background:#e8f2ff;color:#164f91;font-weight:900}.checkpoint details p{margin:12px 4px 0}.final-exam{background:linear-gradient(145deg,#f7fbff,#edf5ff)}.final-exam ol{padding-left:24px}.score-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:9px}.score-grid label{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:0;padding:10px;border:1px solid #d0dfef;border-radius:9px;background:#fff;font-size:.78rem}.score-grid input{width:70px;padding:7px}.score-total{font-size:1.2rem!important}.score-total strong{font-size:1.8rem;color:#176dca}.score-verdict{padding:12px;border-radius:8px;background:#fff2d8;color:#744800!important}.score-verdict.passed{background:#dff8ed;color:#075f42!important}@media(max-width:540px){.score-grid{grid-template-columns:1fr}}

/* 2026-09 orange MIX identity and chapter-purpose layer */
:root{--navy:#2b160c;--navy2:#6f2f12;--blue:#ea580c;--cyan:#fdba74;--paper:#fff7ed;--ink:#2b1b14;--muted:#75645b;--line:#ead9ce;--shadow:0 20px 60px rgba(124,45,18,.12)}
body,.course-body{background:#fff7ed}.login-shell{background:radial-gradient(circle at 75% 20%,rgba(251,146,60,.25),transparent 34%),linear-gradient(145deg,#35170a,#8a3412)}
input:focus,textarea:focus,button:focus-visible,a:focus-visible{outline-color:rgba(234,88,12,.3)}
.text-button,.header-link,.lesson-breadcrumb a,.lesson-nav a,.coach-note a{color:#b54712}
.site-link{display:inline-flex;align-items:center;min-height:36px;padding:0 12px;border:1px solid #edb58f;border-radius:8px;background:#fff7ed;text-decoration:none;white-space:nowrap}
.site-link:hover{background:#ffeadb}
.progress-track{background:#f3e6dd}.progress-track span{background:linear-gradient(90deg,#c2410c,#fb923c)}
.welcome{background:linear-gradient(125deg,#2b160c 0%,#7c2d12 62%,#c2410c 100%)}.welcome:after{background-image:linear-gradient(rgba(255,237,213,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(255,237,213,.07) 1px,transparent 1px)}.welcome .eyebrow,.welcome h1 em{color:#fdba74}.welcome-copy>p:last-of-type{color:#ffedd5}.welcome-meta span{border-color:rgba(254,215,170,.4);color:#fff7ed}.primary-link{color:#9a3412}
.chapter:hover{background:#fff7ed}.chapter small,.chapter a b,.eyebrow{color:#c2410c}.chapter-purpose-summary{max-width:700px;margin:7px 0 4px;color:#6f5b50;font-size:.85rem;line-height:1.65}.chapter-purpose-summary b{margin:0;color:#9a3412;font-size:inherit}
.coach-avatar{background:linear-gradient(135deg,#fb923c,#9a3412)}.messages{background:#fffaf5}.quick-questions button{border-color:#f0b58f;color:#9a3412}.message.assistant{border-color:#ead9ce}
.course-studio{grid-template-columns:300px minmax(0,840px) minmax(300px,380px)}.curriculum-head small{color:#c2410c}.curriculum-item{align-items:start;padding:12px 10px}.curriculum-item>span{margin-top:2px;background:#f7e8de;color:#7c4b32}.curriculum-item.current{background:#fff0e5;box-shadow:inset 3px 0 #ea580c}.curriculum-item.current>span{background:#ea580c}.curriculum-item em{display:block;margin-top:5px;color:#7a665b;font-size:.64rem;font-style:normal;line-height:1.45}.curriculum-item.completed>span{background:#e5f7f0;color:#087a52}
.lesson-points span{background:#fff0e5;color:#9a3412}.video-lesson{background:#35170a;box-shadow:0 18px 50px rgba(86,34,11,.22)}.teacher-label{color:#fdba74}.video-time{color:#ffedd5}.video-lesson video{background:#211008}.voice-credit{color:#e9c6ae}.teacher-mini{background:linear-gradient(135deg,#ffedd5,#fdba74);color:#7c2d12}
.chapter-purpose{margin:28px 0 32px;padding:26px;border:1px solid #f0b58f;border-radius:16px;background:#fff8f2;box-shadow:0 12px 30px rgba(154,52,18,.08)}.chapter-purpose .purpose-label{margin:0!important;color:#c2410c!important;font-size:.72rem!important;font-weight:950;letter-spacing:.12em}.chapter-purpose h2{margin:3px 0 8px!important;padding:0!important;border:0!important;font-size:clamp(1.45rem,3vw,2rem)!important}.chapter-purpose .purpose-lead{margin:0!important;color:#40271b!important;font-size:1.08rem;font-weight:800}.purpose-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:18px}.purpose-grid>div{padding:15px;border-radius:10px;background:#fff;border:1px solid #f1ded1}.purpose-grid small{display:block;margin-bottom:5px;color:#b54712;font-weight:950}.purpose-grid p{margin:0!important;color:#5f4a3f!important;font-size:.9rem}
.lesson-content blockquote{border-left-color:#ea580c;background:#fff4eb;color:#6f3519}.lesson-content th{background:#fff3e9}.lesson-complete{background:#fff2e8;border-color:#f0c3a5}.lesson-complete small{color:#c2410c}
.step-check{border-color:#edaa7d;color:#a33f0c}.step-check:hover{background:#fff3e9}.course-step-heading.step-current{border-color:#f0b58f;background:#fff7f0;box-shadow:0 10px 28px rgba(234,88,12,.08)}
.lesson-lab{border-color:#edc8ae;background:linear-gradient(145deg,#fffaf5,#fff0e5);box-shadow:0 14px 34px rgba(124,45,18,.08)}.lab-heading small{color:#c2410c}.lab-heading>span{background:#35170a;color:#fdba74}.knob b{background:#fb923c}.signal-flow div span,.action-recipe li::before{background:#ea580c}.action-recipe li{background:#fff7f0}
.ear-lab{border-color:#f59e62;background:linear-gradient(145deg,#35170a,#8a3412);box-shadow:0 16px 36px rgba(124,45,18,.18)}.ear-lab-intro{background:linear-gradient(145deg,#59250e,#b54712)}.lab-kicker{color:#fdba74!important}.ear-players button{border-color:#a85f39;background:#5a2812}.ear-players button span{background:#ea580c}.ear-actions button{border-color:#efb084;color:#7c2d12}.download-pack{background:#fdba74;color:#3b1b0d!important}.download-pack.small{border-color:#efaa78;color:#fff1e8!important}
.checkpoint,.final-exam{border-color:#edc8ae;background:#fff8f2}.checkpoint summary{background:#ffeadb;color:#9a3412}.final-exam{background:linear-gradient(145deg,#fffaf5,#fff0e5)}.score-total strong{color:#c2410c}
@media(max-width:1250px){.course-studio{grid-template-columns:250px minmax(0,1fr)}}
@media(max-width:900px){.curriculum-item{flex-basis:250px}.curriculum-item em{font-size:.68rem}}
@media(max-width:540px){.purpose-grid{grid-template-columns:1fr}.chapter-purpose{padding:20px 16px}.chapter-purpose-summary{font-size:.8rem}}

/* Keep the MIX course as readable as START on phones and tablets. */
@media(max-width:900px){
  .course-studio>*{min-width:0}
  .course-studio{grid-template-columns:minmax(0,1fr);width:min(calc(100% - 20px),860px);margin-top:10px}
  .curriculum{position:static;grid-row:auto;min-width:0}
  .curriculum nav{display:flex;gap:6px;max-height:none;overflow-x:auto;overflow-y:hidden;padding:10px;-webkit-overflow-scrolling:touch}
  .curriculum-item{flex:0 0 190px;min-width:0}
  .course-coach{grid-column:auto;position:static;min-width:0}
  .lesson,.lesson-content,.video-lesson,.lesson-lab,.ear-lab,.checkpoint,.final-exam{min-width:0;max-width:100%}
  .video-lesson{overflow:hidden}.video-heading{min-width:0;flex-wrap:wrap}.video-heading>div{min-width:0}
  .video-lesson video,.lesson-content img,.lesson-content svg,.lesson-content canvas{max-width:100%;height:auto}
  .plugin-shell,.table-wrap{max-width:100%;overflow-x:auto}
}
@media(max-width:540px){
  html,body{max-width:100%;overflow-x:hidden}
  .topbar{gap:8px;padding:0 12px}.top-actions{gap:8px}.top-actions span{display:none}
  .site-link{min-height:34px;padding:0 9px;font-size:.75rem}
  .course-studio{width:calc(100% - 12px);gap:10px}
  .course-studio .lesson{padding:20px 15px}
  .curriculum-item{flex-basis:190px}
  .lesson-title-block h1{font-size:clamp(1.8rem,9vw,2.1rem)}
  .lesson-content{font-size:1rem;overflow-wrap:anywhere}
  .lesson-content table{min-width:520px}
  .video-heading{gap:8px}.video-time{flex:0 0 auto}
  .plugin-controls{grid-template-columns:repeat(2,minmax(0,1fr))}
  .signal-flow{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
}
.deepening{margin:44px 0 8px;padding:26px;border:1px solid #edb58f;border-radius:18px;background:linear-gradient(145deg,#fffaf5,#fff0e5);box-shadow:0 14px 34px rgba(124,45,18,.08)}.deepening-kicker{margin:0!important;color:#1976d2!important;font-size:.72rem!important;font-weight:950;letter-spacing:.12em}.deepening h2{margin:4px 0 18px!important;padding:0!important;border:0!important}.deepening-scenario{padding:16px;border-left:4px solid #ea580c;border-radius:9px;background:#fff}.deepening-scenario p{margin:5px 0 0!important}.deepening h3{margin-top:22px!important}.deepening ol{display:grid;gap:8px}.deepening ol li{padding:10px 12px;border-radius:8px;background:rgba(255,255,255,.78)}.deepening-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:20px}.deepening-grid>div{padding:15px;border:1px solid #efd5c4;border-radius:10px;background:#fff}.deepening-grid small,.deepening-grid strong{display:block}.deepening-grid small{margin-bottom:6px;color:#b54712;font-weight:900}.deepening-grid strong{font-size:.9rem;line-height:1.55}@media(max-width:540px){.deepening{padding:19px 14px}.deepening-grid{grid-template-columns:1fr}}