:root{
  --ink:#173b34;
  --green:#24755f;
  --deep:#103f35;
  --mint:#dff1e9;
  --paper:#fffdf8;
  --gold:#b97c35;
  --muted:#647871;
  --line:#cadfd6;
  --soft:#edf6f1;
  --shadow:0 22px 70px rgba(20,62,52,.14);
}
*{box-sizing:border-box}
html{background:#123e35}
body{
  margin:0;
  min-height:100vh;
  color:var(--ink);
  background:radial-gradient(circle at 82% 6%,rgba(244,210,147,.58),transparent 24rem),linear-gradient(145deg,#edf6f1,#fbf4e6 56%,#e4f0e9);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;
}
button,input{font:inherit}
button,a{-webkit-tap-highlight-color:transparent}
button{cursor:pointer}
button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #e8b75d;outline-offset:3px}
[hidden]{display:none!important}
.shell{width:min(100%,680px);min-height:100vh;margin:auto;padding:18px 14px max(34px,env(safe-area-inset-bottom))}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:16px}
.back{color:var(--green);font-size:13px;font-weight:900;text-decoration:none}
.preview-pill{padding:7px 10px;border:1px solid rgba(31,114,93,.22);border-radius:99px;color:var(--green);background:rgba(255,255,255,.68);font-size:11px;font-weight:850}
.card{overflow:hidden;border:1px solid rgba(31,114,93,.17);border-radius:28px;background:rgba(255,253,248,.96);box-shadow:var(--shadow)}
.login-head,.library-head{padding:28px 23px 24px;color:#fff;background:linear-gradient(145deg,#0f493c,#24755f)}
.eyebrow{margin:0 0 9px;color:#f0cf98;font-size:12px;font-weight:950;letter-spacing:.06em}
.login-head h1,.library-head h1{margin:0;font-size:clamp(29px,8vw,40px);line-height:1.18;letter-spacing:-.045em}
.login-head>p:last-child,.library-head>p:last-child{margin:12px 0 0;color:rgba(255,255,255,.82);font-size:15px;line-height:1.7}
.login-body{padding:24px 22px}
label{display:block;margin-bottom:8px;font-size:14px;font-weight:900}
.code-input{width:100%;height:56px;padding:0 15px;border:1.5px solid var(--line);border-radius:15px;outline:0;color:var(--ink);background:#fff;font-size:17px;font-weight:850;letter-spacing:.035em;text-transform:uppercase}
.code-input:focus{border-color:var(--green);box-shadow:0 0 0 4px rgba(31,114,93,.12)}
.input-help,.login-note{margin:9px 0 0;color:var(--muted);font-size:12px;line-height:1.65}
.error{min-height:20px;margin:7px 0 0;color:#a74733;font-size:12px;font-weight:750}
.primary{display:flex;width:100%;min-height:54px;align-items:center;justify-content:center;border:0;border-radius:15px;color:#fff;background:var(--green);font-weight:950;box-shadow:0 10px 24px rgba(36,117,95,.18)}
.primary:disabled{cursor:not-allowed;opacity:.55;box-shadow:none}
.primary:active{transform:translateY(1px)}
.primary.compact{margin-top:18px}
.demo{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:18px 0 0;padding:13px 14px;border:1px dashed #d2af77;border-radius:14px;color:#735325;background:#fff7e9;font-size:12px;line-height:1.55}
.demo button{flex:0 0 auto;padding:0;border:0;color:var(--green);background:none;font-weight:950;text-decoration:underline;cursor:pointer}
.library-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px;color:rgba(255,255,255,.85);font-size:12px;font-weight:850}
.logout{padding:7px 10px;border:1px solid rgba(255,255,255,.3);border-radius:99px;color:#fff;background:rgba(255,255,255,.08);font-size:11px;font-weight:850}
.library-body{padding:17px}
.support-nav{margin-bottom:16px;padding:18px;border:1px solid var(--line);border-radius:22px;background:rgba(255,253,248,.94)}
.support-nav-head h2{margin:0;font-size:23px;line-height:1.32;letter-spacing:-.025em}
.support-nav-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:9px;margin-top:15px}
.support-nav-card{display:flex;min-width:0;flex-direction:column;gap:10px;padding:14px;border:1px solid var(--line);border-radius:16px;color:var(--ink);background:#fff;font:inherit;text-align:left;text-decoration:none}
.support-nav-card:hover{border-color:#89b5a4;background:#f6faf8}
.support-nav-card.current{border-color:#8fb9a9;background:linear-gradient(145deg,#eaf6f0,#fff)}
.support-nav-icon{display:grid;width:34px;height:34px;place-items:center;border-radius:11px;color:#fff;background:var(--green);font-size:14px;font-weight:950}
.support-nav-card strong,.support-nav-card small{display:block}
.support-nav-card strong{font-size:14px;line-height:1.4}
.support-nav-card small{margin-top:4px;color:var(--muted);font-size:10px;line-height:1.55}
.audio-module{scroll-margin-top:16px}
.module-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px;padding:0 4px}
.module-head strong{font-size:13px}
.text-back{padding:5px 0;border:0;color:var(--green);background:transparent;font-size:12px;font-weight:900}
.practice-note{margin-bottom:16px;border:1px solid #b8d6ca;border-radius:20px;background:linear-gradient(145deg,#eaf6f0,#f8fbf8)}
.practice-note summary{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:11px;min-height:76px;padding:13px 15px;list-style:none;cursor:pointer}
.practice-note summary::-webkit-details-marker{display:none}
.practice-note-icon{display:grid;width:40px;height:40px;place-items:center;border-radius:13px;color:#fff;background:var(--green);font-size:20px;font-weight:900}
.practice-note-copy strong,.practice-note-copy small{display:block}
.practice-note-copy strong{font-size:15px;line-height:1.4}
.practice-note-copy small{margin-top:3px;color:var(--muted);font-size:11px;line-height:1.5}
.practice-note-action{color:var(--green);font-size:11px;font-weight:900;white-space:nowrap}
.practice-note-action::after{display:inline-block;margin-left:5px;content:'⌄';transition:transform .18s ease}
.practice-note[open] .practice-note-action::after{transform:rotate(180deg)}
.practice-note-body{padding:17px 18px 18px;border-top:1px solid #cde1d8}
.practice-note-body h2{margin:0 0 10px;font-size:18px;line-height:1.4}
.practice-note-body p{margin:0 0 10px;color:#4f6d65;font-size:13px;line-height:1.75}
.practice-note-body p:last-child{margin-bottom:0}
.practice-note-body .practice-note-ending{padding:11px 12px;border-radius:12px;color:var(--ink);background:rgba(255,255,255,.75);font-weight:850}
.finder,.course,.player-panel{padding:19px;border:1px solid var(--line);border-radius:22px;background:rgba(255,253,248,.94)}
.course,.player-panel{margin-top:16px}
.section-heading,.player-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:14px}
.section-kicker{display:block;margin-bottom:5px;color:var(--green);font-size:11px;font-weight:950}
.section-heading h2,.player-heading h2{margin:0;font-size:23px;line-height:1.32;letter-spacing:-.025em}
.section-lead{margin:9px 0 16px;color:var(--muted);font-size:13px;line-height:1.65}
.quiet-button{border:0;color:var(--green);background:transparent;font-size:12px;font-weight:850;text-decoration:underline;text-underline-offset:4px}
.quiet-button{padding:5px 0;white-space:nowrap}
.ability-list{display:grid;gap:9px;margin-top:17px}
.ability-button{display:flex;width:100%;align-items:center;justify-content:space-between;gap:14px;padding:14px 15px;border:1px solid var(--line);border-radius:16px;color:var(--ink);background:#fff;text-align:left}
.ability-button:hover{border-color:#89b5a4;background:#f6faf8}
.ability-button strong,.ability-button small{display:block}
.ability-button strong{font-size:15px;line-height:1.45}
.ability-button small{margin-top:4px;color:var(--muted);font-size:11px;line-height:1.5}
.ability-button b{flex:0 0 auto;color:var(--green);font-size:18px}
.ability-selection{margin-top:17px}
.selected-ability-head{margin-bottom:13px;padding:14px 15px;border-radius:16px;background:var(--soft)}
.selected-ability-head h3{margin:0;font-size:20px;line-height:1.35}
.selected-ability-head p{margin:7px 0 0;color:var(--muted);font-size:12px;line-height:1.6}
.audio-library-list{overflow:hidden;border:1px solid var(--line);border-radius:16px;background:#fff}
.audio-row{display:grid;width:100%;grid-template-columns:1fr auto;align-items:center;gap:12px;min-height:72px;padding:13px 14px;border:0;border-bottom:1px solid #e4ece8;color:var(--ink);background:#fff;text-align:left}
.audio-row:last-child{border-bottom:0}
.audio-row:hover{background:#f5faf7}
.audio-row strong,.audio-row small{display:block}
.audio-row strong{font-size:14px;line-height:1.45}
.audio-row small{margin-top:4px;color:var(--muted);font-size:11px}
.audio-row b{color:var(--green);font-size:17px}
.course.course-disclosure{padding:0}
.course-summary{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:14px;min-height:88px;padding:17px 19px;cursor:pointer;list-style:none}
.course-summary::-webkit-details-marker{display:none}
.course-summary strong,.course-summary small{display:block}
.course-summary strong{font-size:21px;line-height:1.35;letter-spacing:-.02em}
.course-summary small{margin-top:5px;color:var(--muted);font-size:12px;line-height:1.55}
.course-summary-action{color:var(--green);font-size:12px;font-weight:900;white-space:nowrap}
.course-summary-action::after{display:inline-block;margin-left:6px;content:'⌄';font-size:17px;transition:transform .18s ease}
.course-when-open{display:none}.course-disclosure[open] .course-when-closed{display:none}.course-disclosure[open] .course-when-open{display:inline}
.course-disclosure[open] .course-summary-action::after{transform:rotate(180deg)}
.course-body{padding:0 19px 19px}
.audio-item:not(:last-child){border-bottom:1px solid #e4ece8}
.audio-item .audio-row{border-bottom:0}
.audio-row.selected{color:var(--green);background:#f0f8f4}
.inline-player{padding:15px 14px 17px;border-top:1px solid var(--line);background:linear-gradient(145deg,#edf7f2,#fffdf8)}
.inline-player-head{display:flex;align-items:center;justify-content:space-between;gap:12px}
.inline-player-head .section-kicker{margin:0}
.inline-player-description{margin:7px 0 13px;color:var(--muted);font-size:12px;line-height:1.65}
.inline-player .progress-note{margin:8px 0 0}
.player-panel{border-color:#94c0af;background:linear-gradient(145deg,#f0f8f4,#fffdf8)}
.close-player{display:grid;width:38px;height:38px;place-items:center;border:1px solid var(--line);border-radius:99px;color:var(--green);background:#fff;font-size:24px;line-height:1}
.player-panel>p{margin:10px 0 15px;color:var(--muted);font-size:13px;line-height:1.65}
.player{width:100%;height:44px}
.progress-note{font-size:11px!important;text-align:center}
.feedback{margin-top:17px;padding-top:16px;border-top:1px solid var(--line)}
.feedback>span{font-size:13px;font-weight:900}
.feedback>div{display:grid;grid-template-columns:1fr 1fr;gap:7px;margin-top:10px}
.feedback button{min-height:42px;padding:8px;border:1px solid var(--line);border-radius:12px;color:var(--ink);background:#fff;font-size:11px;font-weight:800}
.feedback button.selected{border-color:var(--green);color:var(--green);background:var(--mint)}
.feedback p{min-height:18px;margin:8px 0 0;color:var(--green);font-size:11px}
.permission{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:16px;padding:13px 14px;border-radius:15px;color:#47665e;background:#edf5f1;font-size:11px;line-height:1.55}
.permission b{color:var(--green)}
.permission>span:last-child{flex:0 0 auto;font-weight:900}
.help{margin:16px 6px 0;color:var(--muted);font-size:11px;line-height:1.65;text-align:center}
@media(min-width:700px){
  .shell{padding-top:32px}
  .card{border-radius:32px}
  .login-head{padding:38px 34px 31px}
  .login-body{padding:29px 34px}
  .library-head{padding:31px 32px 28px}
  .library-body{padding:23px}
}
@media(max-width:430px){
  .support-nav{padding:16px}
  .support-nav-links{grid-template-columns:1fr}
  .support-nav-card{display:grid;grid-template-columns:auto minmax(0,1fr);align-items:center}
  .support-nav-card small{font-size:11px}
  .practice-note summary{grid-template-columns:auto minmax(0,1fr);min-height:72px}
  .practice-note-action{grid-column:2;margin-top:-3px}
  .finder,.course,.player-panel{padding:16px}
  .course.course-disclosure{padding:0}
  .course-summary{min-height:84px;padding:15px 16px}
  .course-summary strong{font-size:19px}
  .course-body{padding:0 16px 16px}
  .section-heading h2,.player-heading h2{font-size:21px}
  .demo{display:block}
  .demo button{display:block;margin-top:8px}
  .permission{align-items:flex-start;flex-direction:column}
}