.mobile-nav-label,.mobile-scene-picker,.mobile-phrase-filter{display:none}
.workspace>*{min-width:0}
.transcript-history>summary{display:none}
@media(max-width:680px){
  :root{--mobile-nav-height:64px;--composer-height:84px}
  html{scroll-padding-top:72px}
  body{overflow-wrap:anywhere}
  .site-header{position:sticky;top:0;height:58px;z-index:30;background:#fff}
  .header-inner{height:58px;padding:0 16px;flex-wrap:nowrap;gap:0}
  .brand{font-size:18px;gap:10px;letter-spacing:1.2px}
  .brand-mark{width:35px;height:35px;border-radius:10px}
  .brand-mark .icon{width:24px;height:24px}
  .brand small{font-size:12px;letter-spacing:.04em;margin-top:4px}
  .header-inner nav{position:fixed;inset:auto 0 0;z-index:50;width:100%;height:calc(var(--mobile-nav-height) + env(safe-area-inset-bottom,0px));padding:7px 12px calc(7px + env(safe-area-inset-bottom,0px));display:grid;grid-template-columns:1fr 1fr;gap:8px;background:#fff;border-top:1px solid var(--line);box-shadow:0 -3px 16px #123c3906}
  .nav-button{display:flex;justify-content:center;align-items:center;gap:9px;border:0;border-radius:10px;min-height:48px;padding:8px 12px;font-size:14px;line-height:1.4}
  .nav-button.active{background:var(--light);color:var(--teal);border:0}
  .nav-button .icon{width:20px;height:20px}
  .desktop-nav-label{display:none}.mobile-nav-label{display:inline}
  .page{padding:14px 12px calc(var(--mobile-nav-height) + var(--composer-height) + env(safe-area-inset-bottom,0px) + 24px)}
  .intro{margin:0 0 16px}
  .intro .eyebrow,.intro p{display:none}
  .intro h1{font-size:clamp(17px,4.8vw,21px);letter-spacing:0;line-height:1.6;margin:0}
  .intro .mode-control{width:100%;display:grid;grid-template-columns:1fr 1fr;margin-top:12px;padding:4px;border-radius:11px}
  .mode-control button{font-size:14px;min-height:44px;padding:9px 8px}
  .workspace{gap:12px}
  .scenes-column>.section-label,.scene-list,.encouragement,.session-note{display:none}
  .mobile-scene-picker,.mobile-phrase-filter{display:block}
  .mobile-scene-picker label,.mobile-phrase-filter label{display:block;font-size:14px;font-weight:500;color:var(--muted);margin-bottom:6px}
  .mobile-scene-picker select,.mobile-phrase-filter select{display:block;max-width:100%;width:100%;min-height:50px;padding:10px 12px;font:inherit;font-size:16px;color:var(--ink);background:#fff;border:1px solid #d4dfd7;border-radius:11px;line-height:1.5}
  select:focus-visible{outline:3px solid #d2a867;outline-offset:3px}
  .practice-card{border-radius:14px;scroll-margin-top:72px}
  .practice-top{padding:17px 16px 11px;gap:10px}
  .practice-top>div{min-width:0}
  .practice-top h2{font-size:18px;line-height:1.5;margin-top:4px}
  .practice-top .eyebrow{font-size:12px;line-height:1.5;letter-spacing:.7px}
  .icon-button{width:44px;height:44px;flex-shrink:0}
  .progress-wrap{padding:0 16px 14px}
  .progress-label{font-size:13px;gap:10px;line-height:1.5}
  .progress-label>span:last-child{white-space:nowrap}
  .conversation{padding:16px 12px 0;min-height:0;max-height:none;overflow:visible}
  .transcript-history{margin-bottom:16px;border-bottom:1px solid var(--line)}
  .transcript-history>summary{display:list-item;min-height:44px;padding:10px 8px;font-size:14px;color:var(--teal);cursor:pointer}
  .transcript-history[open]>summary{margin-bottom:12px}
  .message{gap:8px;margin-bottom:16px}
  .avatar{width:28px;height:28px}
  .message-content{min-width:0;flex:0 1 auto}
  .message-meta{font-size:12px;line-height:1.5;margin-bottom:7px}
  .bubble{padding:13px 14px;border-radius:0 12px 12px 12px}
  .english{font-size:18px;line-height:1.5;word-break:normal;overflow-wrap:anywhere}
  .message.user .english{font-size:16px}
  .translation{font-size:14px;line-height:1.6;margin-top:8px}
  .bubble-audio{gap:8px;margin-top:10px;flex-wrap:wrap}
  .bubble-audio .audio-action{min-height:44px;padding:6px 10px;border-radius:8px;background:#ffffffa8;font-size:14px}
  .reply-area{padding:0 12px 14px}
  .reply-heading{font-size:14px;line-height:1.5;min-height:44px;margin-bottom:7px;gap:8px;flex-wrap:wrap}
  .hint-button{min-height:44px;padding:8px 9px;font-size:14px}
  .choices{gap:8px}
  .choice{width:100%;min-height:64px;padding:12px;gap:10px;border-radius:11px;align-items:flex-start}
  .choice-key{width:26px;height:26px;font-size:13px;border-radius:8px;margin-top:1px}
  .choice-english{font-size:16px;line-height:1.5;overflow-wrap:anywhere}
  .choice-jp{font-size:14px;line-height:1.55;margin-top:5px}
  .choice-check{margin-top:3px}
  .choice.selected{background:#e9f3ed}
  .help-disclosure{margin-top:12px}
  .help-disclosure summary{min-height:48px;font-size:14px;padding:12px}
  .help-option{min-height:58px;padding:12px}
  .help-option span{font-size:15px}.help-option small{font-size:14px}
  .reply-tools{gap:12px;padding:8px 0 0;margin:0;border:0;flex-wrap:wrap}
  .reply-tools .subtle-button{font-size:14px;min-height:44px;padding:8px 3px}
  #reply-form{position:fixed;z-index:45;left:0;right:0;bottom:calc(var(--mobile-nav-height) + env(safe-area-inset-bottom,0px));margin:0;background:#fff;border-top:1px solid var(--line);box-shadow:0 -4px 18px #123c3908;padding:12px}
  .compose-row{gap:8px;align-items:stretch}
  .compose-row textarea{height:56px;max-height:56px;min-width:0;border-radius:10px;font-size:16px;line-height:1.5;padding:14px 11px;scroll-margin-bottom:180px}
  .compose-row textarea::placeholder{font-size:14px;white-space:normal}
  .mic-button{width:44px;min-height:56px;border-radius:10px}
  .compose-row .primary-button{min-height:56px;padding:10px 13px;font-size:15px;border-radius:10px;flex-shrink:0}
  .accepted-actions{position:fixed;z-index:45;inset:auto 0 calc(var(--mobile-nav-height) + env(safe-area-inset-bottom,0px));min-height:84px;padding:12px;background:#fff;border-top:1px solid var(--line);box-shadow:0 -4px 18px #123c3908;flex-wrap:nowrap}
  .accepted-actions .subtle-button{min-height:48px;font-size:14px;padding:6px;line-height:1.5}
  .accepted-actions .primary-button{min-height:56px;font-size:15px;padding:10px 16px}
  .primary-button,.secondary-button{min-height:48px;font-size:15px}
  .feedback{padding:14px;margin:0 0 12px}.feedback strong{font-size:15px}.feedback p{font-size:14px}
  .feedback .text-button{min-height:44px;padding:10px 0;font-size:14px}
  .hint{font-size:14px;line-height:1.7}.hint-example{font-size:16px}
  .practice-bottom{font-size:12px;line-height:1.7;padding:12px}
  .rescue-card{padding:16px}.rescue-phrase{font-size:17px;min-height:44px}.rescue-card p{font-size:14px}.rescue-card .text-button{min-height:44px;display:inline-flex;align-items:center;font-size:14px}
  .voice-note{font-size:13px}
  .completion>p{font-size:14px}.completion h3{font-size:20px}.review-line{font-size:16px}.review-line small{font-size:14px}
  .completion-actions{display:grid;grid-template-columns:1fr;width:100%;gap:10px}
  .completion-actions button{width:100%;min-height:52px}
  #phrases-view{padding-bottom:calc(var(--mobile-nav-height) + env(safe-area-inset-bottom,0px) + 24px)}
  .phrase-heading{margin-bottom:16px}.phrase-heading h1{font-size:24px}.phrase-heading p{font-size:14px}
  .phrase-heading .eyebrow{font-size:12px;letter-spacing:1px}
  .mobile-phrase-filter{margin-bottom:16px}
  .phrase-filters{display:none}.phrase-grid{gap:12px}
  .phrase-card{padding:18px;border-radius:12px}.phrase-card h2{font-size:19px;line-height:1.5}
  .phrase-card>p{font-size:14px}.phrase-tip{font-size:14px}
  .phrase-card-bottom{gap:12px;flex-wrap:wrap}.phrase-card-bottom button{min-height:44px;padding:8px;font-size:14px}
  dialog{padding:24px;max-height:calc(100dvh - 32px);overflow:auto}.dialog-actions{gap:8px;flex-wrap:wrap}.dialog-actions button{flex:1}
  .toast{bottom:calc(var(--mobile-nav-height) + var(--composer-height) + env(safe-area-inset-bottom,0px) + 12px);font-size:14px;max-width:calc(100% - 24px);padding:12px 16px}
  .site-footer{padding-top:18px;font-size:12px}
}
@media(max-width:350px){.compose-row{gap:6px}.compose-row .primary-button{font-size:14px;padding:10px 9px}.mic-button{width:40px}.reply-heading{font-size:13px}.accepted-actions .primary-button{padding:10px 12px}}