/* ===== WordDeck — style.css (แยกจาก vocab-trainer.html เดิม) ===== */
:root{
  --bg:#EDF1F5; --paper:#FFFFFF; --ink:#1B2A41; --muted:#5C6B80; --line:#D3DBE5;
  --sea:#0F7C8C; --sea-soft:#D9EEF1; --amber:#E9A825; --amber-soft:#FBEFD0; --coral:#D95D4F; --coral-soft:#F9DEDA;
  --radius:14px;
}
:root:not([data-theme="light"]){ @media (prefers-color-scheme: dark){
  --bg:#141A22; --paper:#1E2733; --ink:#EEF2F7; --muted:#9AA8BA; --line:#31404F;
  --sea:#4FC3D2; --sea-soft:#173F46; --amber:#F2C24C; --amber-soft:#3F3418; --coral:#F07B6C; --coral-soft:#4A2521;
}}
:root[data-theme="dark"]{
  --bg:#141A22; --paper:#1E2733; --ink:#EEF2F7; --muted:#9AA8BA; --line:#31404F;
  --sea:#4FC3D2; --sea-soft:#173F46; --amber:#F2C24C; --amber-soft:#3F3418; --coral:#F07B6C; --coral-soft:#4A2521;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Sarabun",system-ui,sans-serif;font-size:16px;line-height:1.55}
.word-en{font-family:"Lora",Georgia,serif}
header{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px 20px;max-width:900px;margin:0 auto}
header h1{margin:0;font-size:22px;font-weight:700}
header h1 span{color:var(--sea)}
nav{display:flex;gap:6px;flex-wrap:wrap}
nav button{background:transparent;border:1px solid transparent;color:var(--muted);padding:8px 14px;border-radius:999px;font:inherit;cursor:pointer;font-weight:600}
nav button.active{background:var(--paper);color:var(--ink);border-color:var(--line)}
nav button:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--sea);outline-offset:2px}
main{max-width:900px;margin:0 auto;padding:8px 20px 60px}
.panel{display:none}.panel.active{display:block}
.toolbar{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:16px}
select,input[type=text],textarea{font:inherit;padding:9px 12px;border:1px solid var(--line);border-radius:10px;background:var(--paper);color:var(--ink)}
.btn{font:inherit;font-weight:600;padding:10px 18px;border-radius:10px;border:1px solid var(--line);background:var(--paper);color:var(--ink);cursor:pointer}
.btn.primary{background:var(--sea);border-color:var(--sea);color:#fff}
.btn.good{background:var(--sea-soft);border-color:transparent;color:var(--sea)}
.btn.again{background:var(--coral-soft);border-color:transparent;color:var(--coral)}
.btn:disabled{opacity:.5;cursor:default}
.stat{color:var(--muted);font-size:14px}

/* flashcard */
.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:36px 28px;min-height:340px;display:flex;flex-direction:column;justify-content:center;text-align:center;position:relative}
.card .pos{color:var(--muted);font-size:14px;margin-bottom:6px}
.card .big{font-size:clamp(40px,8vw,64px);font-weight:700;line-height:1.05;margin:0}
.card .ipa{color:var(--sea);font-size:20px;margin:8px 0 18px;font-family:"Lora",serif}
.speak{display:inline-flex;align-items:center;gap:8px;background:var(--sea);color:#fff;border:0;border-radius:999px;padding:10px 20px;font:inherit;font-weight:600;cursor:pointer;margin:0 auto}
.speak.slow{background:var(--paper);color:var(--sea);border:1px solid var(--sea)}
.card .back{margin-top:22px;border-top:1px dashed var(--line);padding-top:20px;text-align:left}
.card .meaning{font-size:24px;font-weight:700;margin:0 0 12px;text-align:center}
.ex{margin:10px 0;padding:12px 14px;background:var(--bg);border-radius:10px;display:flex;gap:10px;align-items:flex-start}
.ex .en{font-family:"Lora",serif;font-size:17px}
.ex .en b{color:var(--sea)}
.ex .th{color:var(--muted);font-size:14px;margin-top:2px}
.ex button{flex:none;background:transparent;border:1px solid var(--line);border-radius:8px;padding:4px 8px;cursor:pointer;color:var(--sea);font-size:14px}
.actions{display:flex;gap:10px;justify-content:center;margin-top:16px;flex-wrap:wrap}
.box{position:absolute;top:12px;right:14px;font-size:12px;color:var(--muted)}
.progress{height:6px;background:var(--line);border-radius:99px;overflow:hidden;margin:14px 0}
.progress i{display:block;height:100%;background:var(--sea);width:0;transition:width .3s}

/* quiz */
.q{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.q .prompt{font-size:32px;font-weight:700;text-align:center;margin:0 0 6px}
.choices{display:grid;gap:10px;margin-top:20px}
.choices button{font:inherit;text-align:left;padding:14px 16px;border-radius:10px;border:1px solid var(--line);background:var(--bg);color:var(--ink);cursor:pointer;font-size:17px}
.choices button.correct{background:var(--sea-soft);border-color:var(--sea)}
.choices button.wrong{background:var(--coral-soft);border-color:var(--coral)}
.feedback{margin-top:14px;text-align:center;min-height:24px;font-weight:600}

/* pronounce */
.mic{width:110px;height:110px;border-radius:50%;border:0;background:var(--coral);color:#fff;font-size:40px;cursor:pointer;margin:16px auto;display:block;transition:transform .15s}
.mic.on{transform:scale(1.1);box-shadow:0 0 0 12px var(--coral-soft)}
.heard{font-family:"Lora",serif;font-size:22px;text-align:center;margin:8px 0;min-height:32px}
.score{text-align:center;font-weight:700;font-size:20px}

/* list */
table{width:100%;border-collapse:collapse;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
th,td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
th{font-size:13px;color:var(--muted);font-weight:600}
tr:last-child td{border-bottom:0}
td .word-en{font-weight:700;font-size:17px}
.tag{display:inline-block;padding:2px 8px;border-radius:999px;font-size:12px;background:var(--bg);color:var(--muted)}
.tag.b3{background:var(--sea-soft);color:var(--sea)}.tag.b0{background:var(--coral-soft);color:var(--coral)}.tag.b1,.tag.b2{background:var(--amber-soft);color:#8a5f00}
.tblwrap{overflow-x:auto}
form.add{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:20px;display:grid;gap:10px;grid-template-columns:1fr 1fr;margin-bottom:18px}
form.add textarea,form.add .full{grid-column:1/-1}
form.add label{font-size:13px;color:var(--muted);display:block;margin-bottom:4px}
.icon{background:transparent;border:0;cursor:pointer;color:var(--muted);font-size:16px}
.empty{text-align:center;color:var(--muted);padding:40px}
.hero{display:flex;justify-content:space-between;align-items:flex-end;gap:12px;margin:6px 0 14px}
.streak{background:var(--amber-soft);color:#8a5f00;padding:8px 14px;border-radius:999px;font-weight:600}
.counts{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-bottom:14px}
.counts div{background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:10px 12px;text-align:center}
.counts b{display:block;font-size:24px;color:var(--sea)}.counts span{font-size:12px;color:var(--muted)}
.timeline{position:relative;padding-left:26px;margin-top:8px}
.timeline:before{content:"";position:absolute;left:9px;top:8px;bottom:8px;width:2px;background:var(--line)}
.sess{position:relative;background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:12px 14px;margin-bottom:10px;display:flex;gap:12px;align-items:center}
.sess:before{content:"";position:absolute;left:-23px;top:18px;width:12px;height:12px;border-radius:50%;background:var(--line);border:2px solid var(--bg)}
.sess.done{opacity:.6}.sess.done:before{background:var(--sea)}
.sess.now{border-color:var(--sea);box-shadow:0 0 0 3px var(--sea-soft)}.sess.now:before{background:var(--amber)}
.sess .t{font-family:"Lora",serif;font-weight:700;font-size:18px;width:58px;flex:none}
.sess .n{flex:1}.sess .n small{color:var(--muted);display:block}
.editor{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:16px;margin:10px 0}
.editor .row{display:grid;grid-template-columns:90px 1fr 70px 32px;gap:8px;margin-bottom:8px;align-items:center}
.editor input,.editor select{width:100%}
.typein{font:inherit;font-family:"Lora",serif;font-size:22px;text-align:center;padding:10px;border:2px solid var(--line);border-radius:10px;width:100%;max-width:360px;background:var(--bg);color:var(--ink)}
@media (max-width:600px){.counts{grid-template-columns:repeat(2,1fr)}.editor .row{grid-template-columns:80px 1fr 60px 28px}form.add{grid-template-columns:1fr}.card{padding:28px 18px}}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}

/* ===== เพิ่มเติม: PWA / มือถือ ===== */
header{position:sticky;top:0;z-index:20;background:var(--bg);padding-top:calc(12px + env(safe-area-inset-top))}
header .hdr-actions{display:flex;gap:6px;align-items:center}
.btn.small{padding:6px 12px;font-size:14px}
#installBtn[hidden]{display:none}
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%) translateY(20px);background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:999px;font-size:14px;opacity:0;pointer-events:none;transition:.25s;z-index:50;max-width:92vw;text-align:center}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0);pointer-events:auto}
.toast button{background:var(--sea);color:#fff;border:0;border-radius:999px;padding:4px 12px;margin-left:8px;font:inherit;font-size:13px;cursor:pointer}
@media (max-width:600px){
  header{flex-direction:column;align-items:stretch;padding:10px 12px}
  header h1{text-align:center}
  nav{overflow-x:auto;flex-wrap:nowrap;-webkit-overflow-scrolling:touch;scrollbar-width:none;padding-bottom:2px}
  nav::-webkit-scrollbar{display:none}
  nav button{flex:none;padding:7px 12px;font-size:14px}
  main{padding:8px 12px 40px}
  .q{padding:18px 14px}.q .prompt{font-size:26px}
}

/* ===== สถิติ ===== */
.stats-grid{display:grid;gap:14px}
.stat-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:16px}
.stat-card h3{margin:0 0 10px;font-size:16px}
.cal-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.cal-head b{font-family:"Lora",serif;font-size:17px}
.cal-legend{font-size:12px;color:var(--muted);display:flex;gap:12px;flex-wrap:wrap;margin-bottom:8px}
.cal-legend i{display:inline-block;width:11px;height:11px;border-radius:50%;margin-right:4px;vertical-align:-1px}
.calendar{display:grid;grid-template-columns:repeat(7,1fr);gap:4px}
.calendar .dow{text-align:center;font-size:12px;color:var(--muted);padding:2px 0}
.cday{aspect-ratio:1;display:grid;place-items:center;border-radius:8px;font-size:14px;background:var(--bg);position:relative}
.cday.empty{background:transparent}
.cday.today{outline:2px solid var(--sea);outline-offset:-2px}
.cday.pass{background:var(--sea);color:#fff;font-weight:700}
.cday.pass::after{content:"✓";position:absolute;right:4px;bottom:1px;font-size:10px}
.cday.fail{background:var(--amber-soft);color:#8a5f00}
.cday.study{background:var(--sea-soft);color:var(--sea)}
.boxchart{display:flex;align-items:flex-end;gap:8px;height:160px;padding-top:22px}
.boxcol{flex:1;height:100%;display:flex;flex-direction:column;justify-content:flex-end;align-items:center}
.boxbar{width:100%;background:var(--sea);border-radius:6px 6px 0 0;min-height:3px;position:relative;transition:height .4s}
.boxbar.b0{background:var(--coral)}.boxbar.bn{background:var(--line)}
.boxbar span{position:absolute;top:-20px;left:0;right:0;text-align:center;font-size:13px;font-weight:700}
.boxlbl{font-size:12px;color:var(--muted);margin-top:4px;text-align:center;line-height:1.2}
.wrong{list-style:none;margin:0;padding:0}
.wrong li{display:flex;align-items:center;gap:10px;padding:8px 0;border-bottom:1px solid var(--line)}
.wrong li:last-child{border-bottom:0}
.wrong .rank{width:24px;height:24px;border-radius:50%;background:var(--coral-soft);color:var(--coral);display:grid;place-items:center;font-size:12px;font-weight:700;flex:none}
.wrong .word-en{font-weight:700}
.wrong .cnt{margin-left:auto;color:var(--coral);font-weight:600;font-size:14px;white-space:nowrap}
.wrong .m{color:var(--muted);font-size:13px}

/* ===== มือถือ: ให้ปุ่มในแถบเครื่องมือเรียงต่อกันแทนที่จะขึ้นบรรทัดละปุ่ม ===== */
@media (max-width:600px){
  .toolbar>div{display:contents}
  .toolbar{gap:8px}
  .toolbar .btn{padding:8px 12px;font-size:14px}
  header .hdr-actions{position:absolute;top:calc(10px + env(safe-area-inset-top));right:12px}
  header{position:sticky;padding-top:calc(10px + env(safe-area-inset-top))}
  header h1{font-size:20px;text-align:left}
  .hero h2{font-size:19px}
  .counts b{font-size:21px}
  .sess{padding:10px 12px;gap:8px}
  .sess .t{width:48px;font-size:16px}
  .timeline{padding-left:20px}
  .timeline:before{left:6px}
  .sess:before{left:-17px}
}

/* ===== ระบบทวนซ้ำ ===== */
.counts b.warn{color:var(--coral)}
.feedback.ok{color:var(--sea)}
.feedback.bad{color:var(--coral)}
.center{text-align:center}
.score-big{font-size:56px;font-weight:700;text-align:center;font-family:"Lora",serif;color:var(--sea);line-height:1.1}
.wrong{list-style:none;margin:0;padding:0}
.wrong li{display:flex;align-items:center;gap:10px;padding:8px 0;border-bottom:1px solid var(--line)}
.wrong li:last-child{border-bottom:0}
.wrong .word-en{font-weight:700}
.wrong .m{color:var(--muted);font-size:14px}
.typein:focus{border-color:var(--sea)}
#u-in{margin-bottom:8px}

/* ===== ตั้งค่าจำนวนรอบทวน ===== */
.rounds-set{background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:12px 14px;margin-bottom:6px}
.rounds-set .seg{display:inline-flex;border:1px solid var(--line);border-radius:10px;overflow:hidden;margin-top:8px;background:var(--paper)}
.rounds-set .seg button{background:transparent;border:0;padding:8px 18px;font:inherit;font-weight:600;color:var(--muted);cursor:pointer}
.rounds-set .seg button.on{background:var(--sea);color:#fff}

/* ===== คำอ่านไทยกำกับ ===== */
.thr{font-family:"Sarabun",sans-serif;color:var(--amber);font-weight:600;white-space:nowrap}
.card .ipa .thr{display:block;font-size:17px;margin-top:2px}
.wrong .thr{font-size:13px}
td .thr{font-size:13px}
.q .stat .thr{font-size:15px}

/* ===== ประโยคตัวอย่าง: คำอ่าน + คำแปลที่ซ่อนไว้ ===== */
.ex .exthr{color:var(--amber);font-size:14px;margin-top:3px;font-family:"Sarabun",sans-serif;line-height:1.5}
.ex .exth{margin-top:5px;color:var(--muted);font-size:14px;min-height:22px}
.ex .exth.show{color:var(--muted)}
.ex .reveal{background:transparent;border:1px dashed var(--line);border-radius:8px;
  padding:4px 10px;font:inherit;font-size:13px;color:var(--muted);cursor:pointer;width:100%;text-align:center}
.ex .reveal:hover{border-color:var(--sea);color:var(--sea)}