/* ===== Reset & Base ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --pink:#ff6b9d;--purple:#c44fe7;--pink-light:#ffb3d1;--purple-light:#e0b3ff;
  --bg:#f5f0ff;--card:#fff;--text:#2d2d2d;--sub:#888;--accent:#e91e63;
  --shadow:0 4px 24px rgba(196,79,231,.12);--shadow-hover:0 8px 32px rgba(196,79,231,.2);
  --radius:16px;--radius-sm:10px;--radius-lg:24px;
  --gradient:linear-gradient(135deg,#ff6b9d 0%,#c44fe7 100%);
  --gradient-soft:linear-gradient(135deg,#ffb3d1 0%,#e0b3ff 100%);
}
html{font-size:16px;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','Noto Sans Thai',sans-serif;background:var(--bg);color:var(--text);line-height:1.6;overflow-x:hidden;min-height:100vh}
button{cursor:pointer;border:none;background:none;font-family:inherit;font-size:inherit;color:inherit}
input{font-family:inherit}

/* ===== Activation ===== */
.activation-overlay{position:fixed;inset:0;z-index:9999;display:flex;align-items:center;justify-content:center;padding:24px;
  background:linear-gradient(135deg,#ff6b9d 0%,#c44fe7 50%,#7c3aed 100%)}
.activation-box{background:rgba(255,255,255,.95);backdrop-filter:blur(20px);border-radius:var(--radius-lg);padding:40px 28px;width:100%;max-width:380px;text-align:center;box-shadow:0 20px 60px rgba(0,0,0,.2)}
.activation-box__icon{font-size:56px;margin-bottom:12px}
.activation-box__title{font-size:24px;font-weight:700;background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:6px}
.activation-box__subtitle{color:var(--sub);font-size:14px;margin-bottom:28px}
.activation-box__input{width:100%;padding:14px 16px;border:2px solid var(--pink-light);border-radius:var(--radius-sm);font-size:18px;text-align:center;letter-spacing:2px;text-transform:uppercase;outline:none;transition:border-color .3s;margin-bottom:16px}
.activation-box__input:focus{border-color:var(--purple)}
.activation-box__btn{width:100%;padding:14px;background:var(--gradient);color:#fff;border-radius:var(--radius-sm);font-size:17px;font-weight:600;transition:transform .2s,box-shadow .2s}
.activation-box__btn:active{transform:scale(.97)}
.activation-box__btn:hover{box-shadow:0 6px 20px rgba(196,79,231,.4)}
.activation-box__hint{color:var(--sub);font-size:13px;margin-top:16px}
.activation-box__hint.error{color:#e53935}

/* ===== Topbar ===== */
.topbar{position:sticky;top:0;z-index:100;display:flex;align-items:center;gap:12px;padding:12px 16px;background:rgba(255,255,255,.85);backdrop-filter:blur(16px);border-bottom:1px solid rgba(196,79,231,.1)}
.topbar__back{font-size:22px;padding:4px 8px;border-radius:8px;transition:background .2s}
.topbar__back:active{background:rgba(196,79,231,.1)}
.topbar__title{flex:1;font-size:17px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar__actions{display:flex;gap:4px;align-items:center}
.topbar__btn{font-size:20px;padding:6px 8px;border-radius:8px;position:relative;transition:background .2s}
.topbar__btn:active{background:rgba(196,79,231,.1)}
.badge{position:absolute;top:0;right:0;background:var(--accent);color:#fff;font-size:10px;min-width:16px;height:16px;border-radius:8px;display:flex;align-items:center;justify-content:center;padding:0 4px}

/* ===== Search Bar ===== */
.search-bar{padding:8px 16px;background:rgba(255,255,255,.85);backdrop-filter:blur(16px);border-bottom:1px solid rgba(196,79,231,.1);display:flex;gap:8px;align-items:center}
.search-bar__input{flex:1;padding:10px 14px;border:2px solid var(--pink-light);border-radius:20px;font-size:15px;outline:none;transition:border-color .3s}
.search-bar__input:focus{border-color:var(--purple)}
.search-bar__close{font-size:18px;padding:4px 8px;color:var(--sub)}

/* ===== Content ===== */
.content{padding:16px;padding-bottom:80px;max-width:680px;margin:0 auto}

/* ===== Home Grid ===== */
.home-hero{text-align:center;padding:32px 0 24px;position:relative}
.home-hero__badge{display:inline-block;padding:4px 14px;background:var(--gradient);color:#fff;font-size:12px;font-weight:600;border-radius:20px;margin-bottom:12px;letter-spacing:1px}
.home-hero__title{font-size:30px;font-weight:800;background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:6px;letter-spacing:1px}
.home-hero__desc{color:var(--sub);font-size:14px}
.home-hero__stats{display:flex;justify-content:center;gap:16px;margin-top:14px;flex-wrap:wrap}
.home-hero__stat{text-align:center}
.home-hero__stat-num{font-size:22px;font-weight:700;color:var(--purple)}
.home-hero__stat-label{font-size:11px;color:var(--sub)}

/* Section Groups */
.section-group{margin-bottom:24px}
.section-group__header{display:flex;align-items:center;gap:10px;padding:10px 4px 12px}
.section-group__icon{font-size:24px;width:40px;height:40px;display:flex;align-items:center;justify-content:center;background:var(--gradient-soft);border-radius:12px;flex-shrink:0}
.section-group__info{flex:1}
.section-group__name{font-size:17px;font-weight:700;color:var(--text)}
.section-group__desc{font-size:12px;color:var(--sub);margin-top:1px}
.section-group__line{flex:0 0 3px;height:28px;background:var(--gradient);border-radius:2px;margin-right:4px}

.cat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.cat-card{background:var(--card);border-radius:var(--radius);padding:22px 14px;text-align:center;box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s;cursor:pointer;position:relative;overflow:hidden}
.cat-card:active{transform:scale(.96)}
.cat-card::before{content:'';position:absolute;top:0;left:0;right:0;height:4px;background:var(--gradient)}
.cat-card__icon{font-size:38px;margin-bottom:8px}
.cat-card__name{font-size:15px;font-weight:700;margin-bottom:3px}
.cat-card__desc{font-size:11px;color:var(--sub);line-height:1.4}
.cat-card__count{font-size:11px;color:var(--purple);margin-top:8px;font-weight:600;background:rgba(196,79,231,.08);padding:3px 10px;border-radius:10px;display:inline-block}

/* ===== Subcategory Tabs ===== */
.sub-tabs{display:flex;gap:8px;overflow-x:auto;padding:8px 0 16px;-webkit-overflow-scrolling:touch;scrollbar-width:none}
.sub-tabs::-webkit-scrollbar{display:none}
.sub-tab{padding:8px 16px;background:var(--card);border-radius:20px;font-size:14px;white-space:nowrap;border:2px solid transparent;transition:all .2s;box-shadow:0 2px 8px rgba(0,0,0,.05)}
.sub-tab.active{background:var(--gradient);color:#fff;border-color:transparent}

/* ===== Subcategory Card Grid (Level 3) ===== */
.subcat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-bottom:20px}
.subcat-card{background:var(--card);border-radius:var(--radius);padding:18px 14px;text-align:center;box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s;cursor:pointer;position:relative;overflow:hidden;border:2px solid transparent}
.subcat-card:active{transform:scale(.96)}
.subcat-card.active{border-color:var(--purple);background:linear-gradient(135deg,rgba(255,107,157,.06) 0%,rgba(196,79,231,.06) 100%)}
.subcat-card__icon{font-size:28px;margin-bottom:6px}
.subcat-card__name{font-size:14px;font-weight:600;margin-bottom:2px}
.subcat-card__count{font-size:11px;color:var(--purple);font-weight:500}
.subcat-card__all{background:var(--gradient);color:#fff}
.subcat-card__all .subcat-card__name{color:#fff}
.subcat-card__all .subcat-card__count{color:rgba(255,255,255,.85)}

/* ===== Sentence Card ===== */
.sentence-card{background:var(--card);border-radius:var(--radius);padding:18px 16px;margin-bottom:14px;box-shadow:var(--shadow);transition:box-shadow .2s;position:relative}
.sentence-card::before{content:'';position:absolute;top:0;left:0;bottom:0;width:3px;background:var(--gradient);border-radius:3px 0 0 3px}
.sentence-card__thai{font-size:21px;font-weight:700;line-height:1.5;margin-bottom:4px;word-break:break-word}
.sentence-card__roman{font-size:14px;color:var(--purple);font-style:italic;margin-bottom:2px;font-weight:500}
.sentence-card__zhuyin{font-size:13px;color:#e91e63;margin-bottom:4px;opacity:.85}
.sentence-card__cn{font-size:15px;color:var(--sub);margin-bottom:10px}
.sentence-card__breakdown{background:rgba(196,79,231,.05);border-radius:10px;padding:10px 12px;margin-bottom:10px;display:none}
.sentence-card__breakdown.show{display:block}
.sentence-card__breakdown-title{font-size:11px;font-weight:600;color:var(--purple);margin-bottom:6px}
.sentence-card__breakdown-items{display:flex;flex-wrap:wrap;gap:6px}
.sentence-card__breakdown-item{background:#fff;padding:4px 10px;border-radius:8px;font-size:12px;border:1px solid rgba(196,79,231,.15)}
.sentence-card__breakdown-word{font-weight:600;color:var(--text)}
.sentence-card__breakdown-mean{color:var(--sub);margin-left:4px}
.sentence-card__meta{margin-bottom:10px;display:none}
.sentence-card__meta.show{display:block}
.sentence-card__meta-item{display:flex;gap:6px;align-items:flex-start;margin-bottom:6px;font-size:13px;line-height:1.5}
.sentence-card__meta-icon{flex-shrink:0;font-size:14px;width:20px;text-align:center}
.sentence-card__meta-text{flex:1;color:var(--text)}
.sentence-card__meta-label{font-size:11px;font-weight:600;color:var(--purple);margin-bottom:2px}
.sentence-card__variations{margin-bottom:10px;display:none}
.sentence-card__variations.show{display:block}
.sentence-card__variations-title{font-size:11px;font-weight:600;color:var(--purple);margin-bottom:6px}
.sentence-card__variation{background:rgba(255,107,157,.08);padding:8px 12px;border-radius:10px;margin-bottom:6px;font-size:13px}
.sentence-card__variation-thai{font-weight:600;color:var(--text)}
.sentence-card__variation-cn{color:var(--sub);margin-left:6px}
.sentence-card__actions{display:flex;gap:8px;align-items:center}
.sentence-card__play{width:44px;height:44px;border-radius:50%;background:var(--gradient);color:#fff;font-size:20px;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:transform .15s}
.sentence-card__play:active{transform:scale(.9)}
.sentence-card__play.playing{animation:pulse 1s infinite}
.sentence-card__fav{font-size:20px;padding:8px;opacity:.6;transition:opacity .2s}
.sentence-card__fav.active{opacity:1}
.sentence-card__expand{font-size:18px;padding:8px;margin-left:auto;opacity:.6}
.sentence-card__toggle{font-size:12px;color:var(--purple);padding:6px 12px;background:rgba(196,79,231,.08);border-radius:16px;font-weight:500;transition:all .2s}
.sentence-card__toggle:active{transform:scale(.95)}

/* ===== Dialogue Card ===== */
.dialogue-card{background:var(--card);border-radius:var(--radius);margin-bottom:14px;box-shadow:var(--shadow);overflow:hidden}
.dialogue-card__header{padding:16px;display:flex;align-items:center;gap:12px;cursor:pointer}
.dialogue-card__icon{font-size:28px}
.dialogue-card__info{flex:1}
.dialogue-card__title{font-size:16px;font-weight:600;margin-bottom:2px}
.dialogue-card__scene{font-size:13px;color:var(--sub)}
.dialogue-card__arrow{font-size:14px;color:var(--sub);transition:transform .3s}
.dialogue-card__arrow.open{transform:rotate(180deg)}
.dialogue-card__body{display:none;padding:0 16px 16px}
.dialogue-card__body.open{display:block}
.dialogue-card__play-all{width:100%;padding:10px;background:var(--gradient-soft);color:#fff;border-radius:var(--radius-sm);font-size:14px;font-weight:500;margin-bottom:12px;display:flex;align-items:center;justify-content:center;gap:6px}
.dialogue-turn{display:flex;gap:10px;padding:10px 0;border-top:1px solid rgba(196,79,231,.08);align-items:flex-start}
.dialogue-turn__speaker{font-size:12px;font-weight:600;color:var(--purple);min-width:50px;padding-top:2px}
.dialogue-turn__content{flex:1}
.dialogue-turn__thai{font-size:16px;font-weight:500;line-height:1.4;margin-bottom:2px}
.dialogue-turn__cn{font-size:13px;color:var(--sub)}
.dialogue-turn__play{width:32px;height:32px;border-radius:50%;background:var(--gradient);color:#fff;font-size:14px;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:transform .15s}
.dialogue-turn__play:active{transform:scale(.9)}
.dialogue-turn__gender{display:inline-block;font-size:10px;padding:2px 8px;border-radius:8px;background:rgba(196,79,231,.1);color:var(--purple);font-weight:500;margin-top:4px}

/* ===== Large Card ===== */
.largecard-overlay{position:fixed;inset:0;z-index:200;background:rgba(0,0,0,.85);display:flex;align-items:center;justify-content:center;padding:20px;animation:fadeIn .3s}
.largecard{background:var(--card);border-radius:var(--radius-lg);padding:40px 28px;width:100%;max-width:500px;text-align:center;position:relative}
.largecard__close{position:absolute;top:12px;right:12px;font-size:22px;color:var(--sub);padding:4px 8px}
.largecard__thai{font-size:32px;font-weight:700;line-height:1.5;margin:20px 0 12px;word-break:break-word}
.largecard__cn{font-size:18px;color:var(--sub);margin-bottom:24px}
.largecard__play{width:64px;height:64px;border-radius:50%;background:var(--gradient);color:#fff;font-size:28px;display:flex;align-items:center;justify-content:center;margin:0 auto;transition:transform .15s}
.largecard__play:active{transform:scale(.9)}

/* ===== Modal ===== */
.modal-overlay{position:fixed;inset:0;z-index:200;background:rgba(0,0,0,.5);display:flex;align-items:flex-end;justify-content:center;animation:fadeIn .3s}
.modal{background:var(--card);border-radius:var(--radius-lg) var(--radius-lg) 0 0;width:100%;max-width:680px;padding:20px;animation:slideUp .3s}
.modal__header{display:flex;align-items:center;justify-content:between;margin-bottom:20px}
.modal__header h2{flex:1;font-size:18px;font-weight:600}
.modal__close{font-size:20px;padding:4px;color:var(--sub)}
.setting-row{display:flex;align-items:center;justify-content:space-between;padding:16px 0;border-bottom:1px solid rgba(0,0,0,.05)}
.setting-row label{font-size:15px;font-weight:500}
.speed-tabs{display:flex;gap:6px}
.speed-tab{padding:6px 14px;border-radius:16px;font-size:13px;background:#f0f0f0;transition:all .2s}
.speed-tab.active{background:var(--gradient);color:#fff}
.setting-info{margin-top:20px;padding:12px;background:rgba(196,79,231,.05);border-radius:var(--radius-sm)}
.setting-info p{font-size:12px;color:var(--sub);margin-bottom:4px}

/* ===== Gender Bar ===== */
.gender-bar{position:fixed;bottom:0;left:0;right:0;z-index:90;display:flex;gap:8px;padding:10px 16px;background:rgba(255,255,255,.9);backdrop-filter:blur(16px);border-top:1px solid rgba(196,79,231,.1);max-width:680px;margin:0 auto}
.gender-bar__btn{flex:1;padding:10px;border-radius:var(--radius-sm);font-size:14px;font-weight:500;background:#f0f0f0;transition:all .2s}
.gender-bar__btn.active{background:var(--gradient);color:#fff}

/* ===== Dialogue Player ===== */
.dialogue-player{position:fixed;bottom:60px;left:16px;right:16px;z-index:95;background:var(--card);border-radius:var(--radius);padding:10px 14px;box-shadow:var(--shadow-hover);display:flex;align-items:center;gap:10px;max-width:648px;margin:0 auto}
.dialogue-player__bar{flex:1;display:flex;align-items:center;gap:10px}
.dialogue-player__bar span{flex:1;font-size:13px;color:var(--sub);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.dialogue-player__bar button{padding:4px 8px;font-size:16px;color:var(--accent)}

/* ===== Search Results ===== */
.search-results{padding-top:8px}
.search-result-item{background:var(--card);border-radius:var(--radius-sm);padding:14px;margin-bottom:8px;box-shadow:0 2px 8px rgba(0,0,0,.05)}
.search-result-item__thai{font-size:17px;font-weight:600;margin-bottom:4px}
.search-result-item__cn{font-size:14px;color:var(--sub)}
.search-result-item__cat{font-size:11px;color:var(--purple);margin-top:4px}

/* ===== Favorites ===== */
.fav-header{text-align:center;padding:16px 0}
.fav-header h2{font-size:20px;font-weight:600}
.fav-empty{text-align:center;padding:60px 20px;color:var(--sub)}
.fav-empty__icon{font-size:48px;margin-bottom:12px}

/* ===== Section Header ===== */
.section-header{font-size:14px;font-weight:600;color:var(--purple);margin:16px 0 10px;padding-left:4px}

/* ===== Content Tabs (单词/句子/对话) ===== */
.content-tabs{display:flex;gap:0;margin-bottom:16px;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.content-tab{flex:1;padding:12px 8px;text-align:center;font-size:14px;font-weight:600;background:var(--card);color:var(--sub);transition:all .2s;cursor:pointer;border:none;position:relative}
.content-tab.active{background:var(--gradient);color:#fff}
.content-tab__count{display:block;font-size:11px;font-weight:400;opacity:.8;margin-top:2px}
.content-tab:not(:last-child)::after{content:'';position:absolute;right:0;top:20%;height:60%;width:1px;background:#eee}

/* ===== Vocab Card ===== */
.vocab-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.vocab-card{background:var(--card);border-radius:var(--radius);padding:16px 14px;box-shadow:var(--shadow);position:relative;overflow:hidden;transition:transform .15s,box-shadow .2s}
.vocab-card:active{transform:scale(.97)}
.vocab-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:var(--gradient)}
.vocab-card__word{font-size:22px;font-weight:700;line-height:1.3;margin-bottom:2px;word-break:break-word}
.vocab-card__roman{font-size:13px;color:var(--purple);font-style:italic;margin-bottom:2px}
.vocab-card__zhuyin{font-size:12px;color:var(--pink);margin-bottom:6px}
.vocab-card__meaning{font-size:14px;font-weight:500;margin-bottom:4px}
.vocab-card__pos{display:inline-block;font-size:10px;padding:1px 6px;border-radius:8px;background:var(--gradient-soft);color:#fff;font-weight:500;margin-left:4px;vertical-align:middle}
.vocab-card__example{font-size:11px;color:var(--sub);line-height:1.4;margin-top:8px;padding-top:8px;border-top:1px solid #f0f0f0}
.vocab-card__example-label{font-size:10px;color:var(--purple);font-weight:600}
.vocab-card__play{position:absolute;top:12px;right:12px;width:32px;height:32px;border-radius:50%;background:var(--gradient);color:#fff;font-size:14px;display:flex;align-items:center;justify-content:center;border:none;box-shadow:0 2px 8px rgba(196,79,231,.3)}
.vocab-card__play:active{transform:scale(.85)}
.vocab-card__play.playing{animation:pulse 1s infinite}

/* ===== Animations ===== */
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(196,79,231,.4)}50%{box-shadow:0 0 0 10px rgba(196,79,231,0)}}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes slideUp{from{transform:translateY(100%)}to{transform:translateY(0)}}
@keyframes cardIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}
.sentence-card,.cat-card,.dialogue-card{animation:cardIn .3s ease-out}

/* ===== Responsive ===== */
@media(min-width:680px){.gender-bar{left:50%;transform:translateX(-50%)}}
@media(max-width:380px){.cat-grid{gap:10px}.cat-card{padding:18px 12px}.cat-card__icon{font-size:32px}.sentence-card__thai{font-size:18px}}