:root{font-family:'DM Sans','Segoe UI',sans-serif;color:var(--text,#183434);background:var(--page-bg,#f5f4ee);font-synthesis:none;--study-text-size:19px}
*{box-sizing:border-box}
body{margin:0}
button,input,select{font:inherit}
button{cursor:pointer}
a{color:var(--accent,#175c55);text-underline-offset:4px}
button:disabled{cursor:not-allowed;opacity:.55}
[hidden]{display:none!important}
h1,h2,h3{font-family:Manrope,'Segoe UI',sans-serif;letter-spacing:-.045em}
h1{font-size:clamp(42px,4.9vw,70px);line-height:1.1;font-weight:750;margin:22px 0}
h2{font-size:30px;line-height:1.2;margin:0 0 12px}
h3{font-size:22px;line-height:1.3}
:focus-visible{outline:2px solid var(--focus,#cf8861);outline-offset:4px}
.page-shell{max-width:1520px;margin:auto;padding:0 clamp(20px,4.5vw,68px)}
.site-header.site-header{display:grid;grid-template-columns:auto 1fr;align-items:center;gap:18px 30px;min-height:108px;height:auto;padding:22px 0 18px;border-bottom:1px solid var(--border,#dfdfd7)}
.brand{display:flex;align-items:center;white-space:nowrap;text-decoration:none;color:var(--accent,#113f3e);font-family:Manrope,'Segoe UI',sans-serif;font-size:23px;font-weight:800;letter-spacing:-1px}
.brand-light{font-weight:500;color:var(--text-muted,#5a7772)}
.brand-mark{display:inline-grid;place-items:center;width:36px;height:36px;margin-right:8px;color:var(--accent,#1a5750)}
.brand-mark svg{display:block;width:34px;height:34px}
.site-nav{display:flex;justify-content:flex-end;flex-wrap:wrap;gap:4px}
.site-nav a{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:44px;padding:10px 15px;border-radius:8px;color:var(--text-muted,#526f63);text-decoration:none;font-size:14px;font-weight:600}
.site-nav a:hover{background:var(--surface-hover,#e9eee3);color:var(--accent,#175c55)}
.site-nav a[aria-current="page"]{background:var(--surface-tinted,#dce9dc);color:var(--accent,#175c55)}
.site-nav span{font-size:11px;font-variant-numeric:tabular-nums;min-width:22px;padding:3px 6px;border-radius:5px;background:var(--surface,#fff)}
.header-tools{grid-column:1/-1;display:flex;align-items:center;justify-content:flex-end;gap:18px;position:relative}
.header-library{font-size:12px;font-weight:600;text-decoration:none}
.interface-language,.interface-theme{display:flex;align-items:center;gap:8px;font-size:11px;color:var(--text-muted,#617571)}
.interface-language select,.interface-theme select{border:1px solid var(--border,#d1dfd5);border-radius:7px;padding:8px 10px;color:var(--text,#183434);background:var(--surface,#fff);font-size:12px;max-width:170px;min-height:36px}
.ui-language-status{position:absolute;right:0;top:100%;padding:8px;background:var(--surface,#fff);color:var(--error-text,#9a4d3f);font-size:12px;max-width:280px;z-index:5}
.skip-link{position:fixed;top:8px;left:20px;z-index:20;padding:12px 16px;border-radius:8px;background:var(--primary,#175c55);color:var(--on-primary,#fff);transform:translateY(-160%)}
.skip-link:focus{transform:translateY(0)}
main{min-height:calc(100dvh - 270px);padding:42px 0 46px;scroll-margin-top:20px}
main:focus{outline:none}
.primary-button,.secondary-button,.account-button{display:inline-flex;align-items:center;justify-content:center;text-decoration:none;min-height:44px;padding:12px 18px;border-radius:9px;font-size:14px;font-weight:650;line-height:1.4}
.primary-button{border:1px solid var(--primary,#175c55);background:var(--primary,#175c55);color:var(--on-primary,#fff)}
.primary-button:hover{background:var(--primary-hover,#0e4942)}
.secondary-button,.account-button{border:1px solid var(--border,#bbd0c4);background:var(--surface,#fff);color:var(--accent,#175c55)}
.secondary-button:hover,.account-button:hover{background:var(--surface-hover,#edf5ee)}
.account-button{padding:8px 14px;min-height:36px;font-size:12px}
.hero{display:grid;grid-template-columns:1.15fr .85fr;align-items:center;gap:clamp(30px,6vw,92px);padding:24px 0 46px;min-height:500px}
.hero-copy{max-width:610px}
.eyebrow{color:var(--accent,#28746b);font-size:13px;font-weight:650;margin:0}
.hero-description{max-width:54ch;font-size:17px;line-height:1.7;color:var(--text-muted,#617571);margin:0}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-art{display:flex;flex-direction:column;align-items:flex-start;justify-content:center;gap:24px;position:relative;min-height:370px;border-radius:16px;background:var(--cover-bg,#175c55);color:var(--cover-text,#f5f4ee);padding:30px;overflow:hidden}
.hero-example-label{font-size:12px;color:var(--cover-text,#f5f4ee);opacity:.8;margin:0}
.hero-language{font-size:13px;font-weight:600;background:var(--cover-label-bg,#286e62);color:var(--cover-text,#f5f4ee);padding:7px 11px;border-radius:6px}
.speech-card{display:flex;align-items:center;gap:14px;position:relative;max-width:100%}
.speech-card-top{font-size:clamp(24px,2.5vw,36px);line-height:1.25;letter-spacing:-.035em;font-weight:650}
#hero-phrase{overflow-wrap:anywhere}
.wave{color:var(--cover-warm,#edaa83);font-size:24px;letter-spacing:-5px;padding-right:7px;flex-shrink:0}
.speech-card-bottom{background:var(--surface,#fff);color:var(--text,#183434);padding:14px 18px;border-radius:10px;align-self:stretch;gap:12px}
.card-icon{display:grid;place-items:center;flex-shrink:0;width:38px;height:38px;background:var(--surface-tinted,#dce9dc);border-radius:8px;color:var(--accent,#175c55);font-size:25px}
.speech-card-bottom span:last-child{display:grid;gap:4px}
.speech-card-bottom strong{font-size:19px;overflow-wrap:anywhere}
.speech-card-bottom small{font-size:14px;color:var(--text-muted,#617571)}
.hero-cover-note{font-size:12px;line-height:1.6;opacity:.8;margin:0;max-width:35ch}
.home-learning{display:grid;grid-template-columns:1fr 1.05fr;gap:36px;padding:30px 0 10px;border-top:1px solid var(--separator,#d9e2d8)}
.home-learning h2{font-size:22px;margin-bottom:8px}
.home-learning p{font-size:14px;color:var(--text-muted,#617571);line-height:1.6;margin:0;max-width:47ch}
.learning-steps{display:flex;flex-wrap:wrap;align-items:center;gap:15px 24px;font-size:13px;font-weight:600;color:var(--accent,#28746b)}
.learning-steps span{border-left:2px solid var(--warm-accent,#cf8861);padding-left:12px}
.workspace{max-width:900px;margin:18px auto 30px;background:var(--surface,#fff);border:1px solid var(--border,#e4e8e1);border-radius:16px;padding:38px}
.section-heading p{font-size:14px;line-height:1.65;color:var(--text-muted,#617571);margin:0;max-width:60ch}
.account-access-note{margin-top:14px!important;color:var(--accent,#476f62)!important}
.video-form{margin-top:30px}
.field-label{display:block;font-size:13px;font-weight:650;margin-bottom:10px}
.url-row{display:flex;align-items:center;gap:12px;padding:6px 6px 6px 16px;border:1px solid var(--border,#dce4df);border-radius:10px;background:var(--surface-subtle,#f8faf7)}
.url-row:focus-within{outline:2px solid var(--focus,#a1c8b7);outline-offset:2px}
.link-icon{font-size:20px;color:var(--accent,#619087)}
.url-row input{flex:1;min-width:0;min-height:44px;outline:0;border:0;background:transparent;color:var(--text,#183434);font-size:15px}
.url-row input::placeholder{color:var(--text-quiet,#82908a)}
.url-row button,.language-confirm button{border:0;border-radius:8px;background:var(--primary,#175c55);color:var(--on-primary,#fff);padding:14px 18px;min-height:44px;font-size:13px;font-weight:650}
.url-row button:hover,.language-confirm button:hover{background:var(--primary-hover,#0e4942)}
.url-row button span{padding-left:8px}
.options-row{display:flex;flex-wrap:wrap;gap:20px;margin-top:22px}
.options-row label,.result-controls label{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:12px;font-weight:600;color:var(--text-muted,#617571)}
.options-row select,.language-confirm select,.result-controls select,.voice-options select{border:1px solid var(--border,#dce4df);border-radius:7px;padding:9px 10px;max-width:100%;background:var(--surface,#fff);color:var(--text,#264941);font-size:13px;min-height:38px}
.status{margin-top:24px;padding:14px 16px;border-radius:8px;background:var(--success-bg,#edf5f0);color:var(--success-text,#275950);font-size:13px;line-height:1.6}
.status.error{background:var(--error-bg,#fcefe9);color:var(--error-text,#9a4d3f)}
.language-confirm{display:flex;align-items:center;flex-wrap:wrap;gap:14px;margin-top:20px;padding:18px;border-radius:10px;border:1px solid var(--warning-border,#ecd6c0);background:var(--warning-bg,#fff7ef)}
.language-confirm>div{flex:1;min-width:200px}
.language-confirm strong{font-size:14px}
.language-confirm p{margin:6px 0 0;font-size:13px;line-height:1.5;color:var(--warning-text,#876f62)}
.language-confirm select{max-width:170px}
.material-library{padding:12px 0 20px}
.library-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:24px}
.library-heading p{max-width:62ch;font-size:14px;line-height:1.6;color:var(--text-muted,#617571);margin:0}
.library-heading>.primary-button{flex-shrink:0}
.library-size{display:block;margin:24px 0 0;font-size:12px;color:var(--text-muted,#617571)}
.library-search{display:grid;gap:8px;max-width:600px;margin:22px 0;font-size:12px;color:var(--text-muted,#526f63)}
.library-search input{width:100%;padding:13px 15px;border:1px solid var(--border,#dce4df);border-radius:9px;background:var(--surface,#fff);color:var(--text,#183434);font-size:14px}
.library-status{max-width:62ch;margin:40px 0;padding:24px 0;border-top:1px solid var(--separator,#d9e2d8);font-size:14px;line-height:1.7;color:var(--text-muted,#617571)}
.material-row{display:flex;align-items:center;gap:24px;border-top:1px solid var(--separator,#dfe5db);padding:22px 0}
.material-row:last-child{border-bottom:1px solid var(--separator,#dfe5db)}
.material-open{display:grid;gap:9px;flex:1;min-width:0;min-height:44px;background:none;border:0;text-align:left;color:var(--text,#183434);padding:4px 0}
.material-open strong{font-size:18px;line-height:1.4;overflow-wrap:anywhere;font-weight:650}
.material-open span{font-size:13px;color:var(--text-muted,#617571);line-height:1.5}
.material-open:hover strong{color:var(--accent,#28746b);text-decoration:underline;text-underline-offset:4px}
.material-resume{font-size:13px;line-height:1.5;color:var(--accent,#28746b)}
.material-delete{min-height:44px;background:none;border:0;padding:10px 4px;color:var(--text-muted,#7c7169);font-size:12px}
.material-delete:hover{color:var(--error-text,#9a4d3f);text-decoration:underline}
.back-link{display:inline-block;margin-bottom:22px;font-size:13px;font-weight:600}
.result-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:26px;margin-bottom:26px}
.result-heading>div:first-child{min-width:0;flex:1}
.result-heading p{margin:0;font-size:13px;line-height:1.65;color:var(--text-muted,#617571);overflow-wrap:anywhere;max-width:75ch}
.material-save-status{color:var(--accent,#28746b)!important;font-size:12px!important;margin-top:8px!important}
.result-controls{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:12px 18px;max-width:51%;font-size:12px}
.result-controls a{font-size:12px;text-decoration:none;min-height:38px;display:flex;align-items:center;line-height:1.4}
.result-controls a:hover{text-decoration:underline}
.result-controls button{min-height:38px;padding:9px 12px;border:1px solid var(--border,#bdd6c7);border-radius:7px;background:var(--surface-tinted,#edf6ef);color:var(--accent,#175c55);font-size:12px;font-weight:600}
.study-layout{display:grid;grid-template-columns:minmax(270px,.72fr) minmax(0,1.65fr);align-items:start;gap:24px}
.study-top{display:grid;gap:16px;min-width:0;position:sticky;top:20px}
.video-panel,.word-panel,.transcript-panel{background:var(--surface,#fff);border:1px solid var(--border,#e3e9e2);border-radius:12px;min-width:0;overflow:hidden}
.video-frame{aspect-ratio:16/9;background:var(--video-bg,#183434);overflow:hidden}
.video-frame iframe,.video-frame #video-player{width:100%;height:100%;display:block}
.video-frame.video-unavailable{display:grid;place-items:center;padding:24px;color:var(--video-text,#e2ebe4);text-align:center;font-size:13px;line-height:1.6}
.player-status{margin:0;padding:12px 16px;font-size:12px;line-height:1.5;color:var(--text-muted,#647d75)}
.video-frame.audio-mode{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:24px;background:var(--surface-tinted,#e4eee5);color:var(--text,#183434);min-height:230px;aspect-ratio:auto;text-align:center}
.audio-mode strong{font-size:21px;font-family:Manrope,'Segoe UI',sans-serif;line-height:1.3;overflow-wrap:anywhere;max-width:100%}
.audio-mode p{font-size:12px;line-height:1.6;color:var(--text-muted,#5d7970);margin:0}
.audio-mode audio{width:100%;margin-top:5px}
.word-panel{padding:22px}
.word-panel-label,.meaning-label{font-size:12px;font-weight:650;color:var(--accent,#28746b);line-height:1.5}
.word-empty{display:flex;align-items:flex-start;gap:12px;font-size:14px;line-height:1.65;color:var(--text-muted,#617571);margin:20px 0}
.word-empty p{margin:0}
.word-empty-icon{font-size:26px;color:var(--accent,#619087);line-height:1}
.word-panel h3{margin:16px 0 4px;font-size:30px;overflow-wrap:anywhere}
.ipa{font-size:16px;color:var(--accent,#619087);margin:0 0 22px;overflow-wrap:anywhere}
.meaning-label span{font-weight:400;font-size:10px}
.translation{font-family:Manrope,'Segoe UI',sans-serif;font-size:22px;font-weight:650;line-height:1.5;margin:8px 0 18px;overflow-wrap:anywhere}
.word-actions{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.word-actions button{flex:1;min-height:44px;border:1px solid var(--border,#d4e5dc);border-radius:8px;background:var(--surface-tinted,#edf6ef);color:var(--accent,#175c55);padding:10px 12px;font-size:12px;font-weight:650;line-height:1.5}
.word-actions button:first-child{background:var(--primary,#175c55);border-color:var(--primary,#175c55);color:var(--on-primary,#fff)}
.word-actions button:hover{filter:brightness(.95)}
#word-time{font-size:12px;text-decoration:none}
.voice-options{margin-top:20px;padding-top:16px;border-top:1px solid var(--separator,#e5ece6)}
.voice-options label{display:grid;gap:8px;font-size:12px;color:var(--text-muted,#647d75)}
.voice-options select{width:100%;font-size:12px}
.panel-top{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;padding:18px 22px;border-bottom:1px solid var(--separator,#edf0e9);font-size:12px;line-height:1.5;color:var(--text-muted,#617571)}
.transcript-controls{display:flex;align-items:center;flex-wrap:wrap;gap:12px 20px}
.follow-control{display:flex;align-items:center;gap:7px;cursor:pointer;color:var(--accent,#476f62)}
.follow-control input{accent-color:var(--accent,#175c55);width:16px;height:16px;margin:0}
.transcript{max-height:calc(100dvh - 140px);min-height:420px;padding:28px 32px;overflow:auto;scrollbar-color:var(--scroll-thumb,#b4cbc0) var(--surface-subtle,#f4f7f2)}
.segment{position:relative;padding-left:48px;font-size:var(--study-text-size);line-height:1.95;margin:0 0 24px;color:var(--text,#30423c)}
.segment-time{position:absolute;left:0;top:7px;font-size:11px;line-height:1.95;color:var(--text-muted,#617571);font-weight:600;font-variant-numeric:tabular-nums}
.word{display:inline;border:0;border-radius:4px;background:none;color:inherit;padding:3px 2px;line-height:inherit;white-space:pre-wrap;overflow-wrap:anywhere;text-align:left}
.word:hover,.word.active{background:var(--selection-bg,#dcefe4);color:var(--selection-text,#17564c)}
.word:focus-visible{background:var(--selection-bg,#dcefe4);color:var(--selection-text,#17564c);outline:2px solid var(--focus,#cf8861);outline-offset:1px}
.word.active:not(.speaking){box-shadow:inset 0 -2px 0 var(--focus,#cf8861)}
.word.speaking,.word.speaking:hover,.word.speaking:focus{background:var(--primary,#175c55);color:var(--on-primary,#fff)}
.empty-view{max-width:640px;margin:65px auto;padding:35px 0}
.empty-view h2{font-size:34px}
.empty-view p{font-size:16px;line-height:1.7;color:var(--text-muted,#617571);margin:0 0 26px}
.account-section{max-width:1050px;margin:12px auto 0;padding-bottom:10px}
.account-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:20px}
.account-heading p{font-size:14px;color:var(--text-muted,#617571);margin:0;overflow-wrap:anywhere}
.account-summary{display:grid;grid-template-columns:.75fr 1fr 1fr;gap:32px;margin-top:30px;padding:26px 0;border-top:1px solid var(--separator,#dfe5db);border-bottom:1px solid var(--separator,#dfe5db)}
.account-summary>div{display:grid;align-content:start;gap:10px}
.account-summary span{font-size:13px;color:var(--text-muted,#617571)}
.account-summary strong{font-size:20px;font-weight:650}
.account-summary progress{width:100%;height:7px;accent-color:var(--accent,#28746b);border:0;border-radius:4px;overflow:hidden}
.account-summary progress::-webkit-progress-bar{background:var(--surface-tinted,#dde8df)}
.account-summary progress::-webkit-progress-value{background:var(--accent,#28746b)}
.account-summary progress::-moz-progress-bar{background:var(--accent,#28746b)}
.account-status,.billing-status,.payment-history p,.legal-note{font-size:13px;line-height:1.6;color:var(--text-muted,#617571)}
.billing-heading{margin-top:34px}
.billing-heading h3{margin:0 0 10px}
.billing-heading p{font-size:14px;line-height:1.6;color:var(--text-muted,#617571);margin:0}
.billing-status{padding:14px 16px;background:var(--surface-tinted,#e8efe6);border-left:3px solid var(--scroll-thumb,#92b29b)}
.billing-plans{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px;margin:22px 0}
.billing-plan{padding:24px;background:var(--surface,#fff);border:1px solid var(--border,#dce4df);border-radius:12px}
.billing-plan h4{font-size:17px;margin:0 0 18px}
.billing-plan>strong{font-size:28px;font-family:Manrope,'Segoe UI',sans-serif}
.billing-plan p{font-size:13px;line-height:1.6;color:var(--text-muted,#617571);margin:14px 0 22px}
.billing-plan button{width:100%}
.payment-history{padding:20px 0;border-bottom:1px solid var(--separator,#dfe5db);font-size:14px}
.payment-history summary{cursor:pointer;font-weight:600}
.legal-note{max-width:70ch;font-size:12px;margin:20px 0 0}
.legal-links{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:12px 18px}
.legal-links a{color:var(--accent,#527668);line-height:1.5}
.account-data{padding-top:28px}
.account-data h3{margin:0 0 10px}
.account-data p{font-size:14px;color:var(--text-muted,#617571);line-height:1.6;margin:0 0 18px}
.account-data>div{display:flex;align-items:center;flex-wrap:wrap;gap:18px}
.delete-account-button{min-height:44px;background:none;border:0;color:var(--error-text,#9a4d3f);font-size:13px;padding:10px 0;text-decoration:underline;text-underline-offset:4px}
.terms-notice{margin:28px 0;padding:24px;border:1px solid var(--border,#bfd0c4);border-radius:10px;background:var(--surface-hover,#edf5ee)}
.terms-notice h3{margin:0 0 10px}
.terms-notice>p{font-size:14px;line-height:1.6;color:var(--text-muted,#617571)}
.terms-notice .legal-links{justify-content:flex-start;font-size:13px}
.terms-notice form{display:grid;gap:14px;margin-top:20px}
.terms-checkbox{display:flex;align-items:flex-start;gap:10px;font-size:13px;line-height:1.6}
.terms-checkbox input{accent-color:var(--accent,#175c55);margin:4px 0 0}
.terms-notice .primary-button{justify-self:start}
.auth-dialog{width:min(460px,calc(100% - 32px));max-height:calc(100dvh - 40px);padding:30px;border:1px solid var(--border,#dce4df);border-radius:14px;color:var(--text,#183434);background:var(--surface-subtle,#f8faf7);box-shadow:0 24px 90px var(--dialog-shadow-color,#123c3b30)}
.auth-dialog::backdrop{background:var(--backdrop,#102b2c80)}
.auth-heading{display:flex;align-items:center;justify-content:space-between;gap:16px}
.auth-heading h2{font-size:25px;margin:0}
.auth-close{border:0;background:none;color:var(--accent,#476f62);font-size:28px;line-height:1;min-width:36px;min-height:36px}
.auth-dialog>p{font-size:14px;color:var(--text-muted,#617571);line-height:1.6;margin:16px 0 24px}
.auth-form{display:grid;gap:18px}
.auth-form>label{display:grid;gap:8px;font-size:13px;font-weight:600}
.auth-form input:not([type="checkbox"]){width:100%;padding:13px;border:1px solid var(--border,#bfd0c4);background:var(--surface,#fff);border-radius:8px;color:var(--text,#183434);font-size:16px}
.auth-form>small{font-size:12px;color:var(--text-muted,#617571);margin-top:-9px}
.auth-consent{font-size:12px;line-height:1.65;color:var(--text-muted,#526f63)}
.auth-consent label{display:flex;align-items:flex-start;gap:10px;margin-bottom:10px}
.auth-consent input{margin:4px 0 0;accent-color:var(--accent,#175c55);flex-shrink:0}
.auth-status{font-size:13px;line-height:1.6;margin:0;padding:12px;border-radius:6px;background:var(--error-bg,#fcefe9);color:var(--error-text,#9a4d3f)}
.auth-switch{display:block;width:100%;min-height:44px;margin-top:16px;border:0;background:none;color:var(--accent,#175c55);font-size:13px;text-decoration:underline;text-underline-offset:4px}
.danger-button{background:var(--danger-bg,#9a4d3f);border-color:var(--danger-bg,#9a4d3f);color:var(--on-danger,#fff)}
.danger-button:hover{background:var(--danger-hover,#823f33)}
footer{display:flex;align-items:flex-start;justify-content:space-between;flex-wrap:wrap;gap:16px 28px;padding:24px 0 30px;border-top:1px solid var(--separator,#d9e2d8);color:var(--text-muted,#617571);font-size:12px;line-height:1.5}
footer span:first-child{font-size:14px;font-weight:700;color:var(--accent,#3b685e)}
footer .legal-links{font-size:11px}
html[lang="zh"] h1{line-height:1.3;letter-spacing:-.025em}
.word-change #hero-language,.word-change #hero-phrase,.word-change #hero-word{animation:word-arrival .35s ease-out both}
@keyframes word-arrival{from{opacity:0;translate:0 5px}to{opacity:1;translate:0 0}}
@media(min-width:1200px){.site-header.site-header{grid-template-columns:auto 1fr auto;gap:16px 22px;padding:22px 0;min-height:100px}.header-tools{grid-column:auto;gap:12px}.site-nav{justify-content:center}.site-nav a{font-size:13px;padding:10px 12px}.header-tools .interface-language,.header-tools .interface-theme{display:grid;gap:4px}.interface-language select{width:126px}}
@media(max-width:1100px){.hero{gap:34px}.hero-art{padding:26px}.study-layout{grid-template-columns:minmax(260px,.85fr) minmax(0,1.35fr);gap:18px}.transcript{padding:24px}.result-heading{display:block}.result-controls{max-width:none;justify-content:flex-start;margin-top:20px}.home-learning{grid-template-columns:1fr;gap:24px}}
@media(max-width:760px){.site-header.site-header{grid-template-columns:1fr;padding:18px 0;gap:16px}.site-nav{justify-content:flex-start;flex-wrap:nowrap;overflow-x:auto;gap:2px;margin:0 -6px}.site-nav a{flex-shrink:0;padding:10px 12px;font-size:13px}.header-tools{grid-column:auto;justify-content:flex-start;flex-wrap:wrap;gap:12px 16px}.hero{grid-template-columns:1fr;padding:6px 0 30px;gap:32px;min-height:0}.hero-copy{max-width:600px}.hero-art{min-height:300px;gap:20px}.speech-card-top{font-size:30px}.hero-description{font-size:16px}.home-learning{padding-top:24px}.study-layout{grid-template-columns:1fr}.study-top{position:static;grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:start}.transcript{max-height:70dvh;min-height:350px}.word-panel{padding:18px}.word-panel h3{font-size:26px}.word-empty{font-size:13px;margin:14px 0}.voice-options{margin-top:14px}.video-frame.audio-mode{padding:18px;min-height:220px}.account-summary{grid-template-columns:1fr 1fr;gap:24px}.account-summary>div:first-child{grid-column:1/-1}footer .legal-links{justify-content:flex-start;flex-basis:100%}}
@media(max-width:520px){.page-shell{padding:0 18px}main{padding:30px 0 36px}.site-header.site-header{padding:16px 0}.brand{font-size:21px}.site-nav{margin:0 -4px}.site-nav a{font-size:12px;padding:10px 9px}.header-tools .interface-language,.header-tools .interface-theme{display:flex;gap:7px;font-size:10px}.header-tools .interface-language>span{display:none}.interface-theme select{width:112px!important}.interface-language select{max-width:118px;font-size:12px}h1{font-size:43px}h2{font-size:27px}.hero-art{padding:24px;min-height:280px}.hero-actions{gap:10px}.hero-actions a{flex:1;min-width:140px;font-size:13px}.hero-description{font-size:15px}.home-learning h2{font-size:21px}.learning-steps{gap:14px;font-size:12px}.workspace{padding:24px 18px;margin:0}.url-row{display:grid;grid-template-columns:18px minmax(0,1fr);padding:8px 12px;gap:8px}.url-row input{font-size:16px}.url-row button{grid-column:1/-1;width:100%}.options-row{display:grid;gap:16px}.options-row label{justify-content:space-between}.options-row select{min-width:0;max-width:65%}.library-heading{flex-wrap:wrap;gap:20px}.library-heading p{font-size:13px}.material-row{flex-wrap:wrap;gap:10px 16px;padding:20px 0}.material-open{flex-basis:100%}.material-open strong{font-size:17px}.material-resume{flex:1;font-size:12px}.study-top{grid-template-columns:1fr;gap:12px}.video-panel{max-width:100%}.video-frame{max-height:245px}.word-panel{padding:18px}.word-empty{margin:14px 0 4px}.word-panel h3{margin-top:12px}.ipa{margin-bottom:14px}.translation{margin-bottom:14px}.voice-options{margin-top:14px;padding-top:12px}.voice-options label{display:flex;align-items:center;flex-wrap:wrap;gap:6px}.voice-options select{flex:1;min-width:170px}.result-controls{gap:10px 14px}.result-controls label{width:100%;justify-content:space-between}.result-controls label select{width:65%;min-width:0}.panel-top{padding:16px 18px}.transcript{padding:22px 18px;max-height:68dvh;min-height:320px}.segment{font-size:18px;line-height:1.95;padding-left:40px}.segment-time{font-size:10px;top:7px}.word-actions button{font-size:12px}.account-summary{grid-template-columns:1fr;gap:24px}.account-summary>div:first-child{grid-column:auto}.billing-plans{grid-template-columns:1fr}.auth-dialog{padding:24px}.auth-heading h2{font-size:23px}.empty-view{margin:25px auto;padding:20px 0}.empty-view h2{font-size:30px}.account-heading .secondary-button{font-size:12px;padding:10px 12px}.language-confirm>div{min-width:0;flex-basis:100%}.legal-links{gap:12px 16px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;scroll-behavior:auto!important;transition:none!important}}

/* On a phone, keep the actual selected word visible while reading the transcript. */
.word-dock{display:none}
@media(max-width:520px){body[data-view="study"] main{padding-bottom:100px}.word-dock{position:fixed;z-index:8;left:18px;right:18px;bottom:16px;bottom:calc(16px + env(safe-area-inset-bottom));display:flex;align-items:center;gap:12px;min-height:56px;max-width:700px;margin:auto;padding:12px 16px;border:1px solid var(--border,#bbd0c4);border-radius:12px;background:var(--surface,#fff);color:var(--text,#183434);box-shadow:0 6px 28px var(--dialog-shadow-color,#123c3b30);text-align:left}.word-dock strong{max-width:42%;font-size:16px;color:var(--accent,#175c55)}.word-dock span:first-of-type{flex:1;min-width:0;color:var(--text-muted,#617571);font-size:13px}.word-dock strong,.word-dock span:first-of-type{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.word-dock span:last-child{font-size:20px;color:var(--accent,#175c55)}body:not([data-view="study"]) .word-dock{display:none}}

@media(pointer:coarse){select,.account-button,.auth-close{min-height:44px}}