/* ===== App luyện nói tiếng Việt — giao diện chung ===== */
:root{
  --nen:#faf7f2; --the:#ffffff; --chu:#22201d; --chu-mo:#6b6560;
  --chinh:#c9622e; --chinh-nhat:#fbeee6; --vien:#e8e1d8;
  --xanh:#2e7d5b; --do:#c0392b; --vang:#d4a017;
  --bo-goc:16px; --bong:0 2px 10px rgba(0,0,0,.06);
}
*{box-sizing:border-box}
body{margin:0;background:var(--nen);color:var(--chu);
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:17px;line-height:1.6;-webkit-tap-highlight-color:transparent}
.boc{max-width:560px;margin:0 auto;padding:16px 16px 96px}

/* --- Đầu trang --- */
.dau{display:flex;align-items:center;gap:12px;margin:8px 0 20px}
.dau h1{font-size:21px;margin:0;font-weight:700;letter-spacing:-.3px}
.dau .phu{font-size:14px;color:var(--chu-mo);margin:2px 0 0}
.nut-ve{background:none;border:none;font-size:26px;color:var(--chinh);
  padding:4px 8px;cursor:pointer;line-height:1}

/* --- Thẻ --- */
.the{background:var(--the);border:1px solid var(--vien);border-radius:var(--bo-goc);
  padding:18px;margin-bottom:14px;box-shadow:var(--bong)}
.the-bam{cursor:pointer;transition:transform .12s,box-shadow .12s;
  display:flex;align-items:center;gap:14px;width:100%;text-align:left;font:inherit;color:inherit}
.the-bam:active{transform:scale(.985);box-shadow:0 1px 4px rgba(0,0,0,.08)}
.the-bam .bieu-tuong{font-size:34px;flex-shrink:0;width:52px;height:52px;
  display:grid;place-items:center;background:var(--chinh-nhat);border-radius:14px}
.the-bam h2{font-size:18px;margin:0 0 3px;font-weight:650}
.the-bam p{font-size:14px;color:var(--chu-mo);margin:0}

/* --- Nút --- */
.nut{display:block;width:100%;padding:16px;border-radius:14px;border:none;
  background:var(--chinh);color:#fff;font-size:18px;font-weight:600;
  font-family:inherit;cursor:pointer;margin-top:12px}
.nut:active{filter:brightness(.93)}
.nut[disabled]{opacity:.45;cursor:not-allowed}
.nut.phu{background:var(--the);color:var(--chinh);border:2px solid var(--vien)}
.nut.nho{padding:11px;font-size:15px;display:inline-block;width:auto;padding-inline:20px}

/* --- Tiến độ hôm nay --- */
.hom-nay{background:linear-gradient(135deg,#c9622e,#a84d20);color:#fff;
  border-radius:var(--bo-goc);padding:18px;margin-bottom:18px}
.hom-nay .so-lon{font-size:40px;font-weight:700;line-height:1;margin:6px 0}
.hom-nay .nhan{font-size:14px;opacity:.9}
.thanh{height:9px;background:rgba(255,255,255,.28);border-radius:99px;overflow:hidden;margin-top:12px}
.thanh > i{display:block;height:100%;background:#fff;border-radius:99px;transition:width .4s}

/* --- Ô số liệu --- */
.luoi-so{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.o-so{background:var(--the);border:1px solid var(--vien);border-radius:12px;padding:14px;text-align:center}
.o-so b{display:block;font-size:24px;font-weight:700}
.o-so span{font-size:13px;color:var(--chu-mo)}

/* --- Thanh dưới --- */
.thanh-duoi{position:fixed;left:0;right:0;bottom:0;background:var(--the);
  border-top:1px solid var(--vien);display:flex;padding:6px 0 max(6px,env(safe-area-inset-bottom))}
.thanh-duoi button{flex:1;background:none;border:none;padding:8px 4px;font-family:inherit;
  font-size:12px;color:var(--chu-mo);cursor:pointer;display:grid;gap:3px;justify-items:center}
.thanh-duoi button .bt{font-size:22px;line-height:1}
.thanh-duoi button.dang{color:var(--chinh);font-weight:650}

/* --- Tiện ích --- */
.an{display:none!important}
.giua{text-align:center}
.mo{color:var(--chu-mo)}
.nho{font-size:14px}
.canh-bao{background:#fff7e6;border:1px solid #f0d9a8;border-radius:12px;
  padding:14px;font-size:14px;margin-bottom:14px}
.dung{color:var(--xanh)} .sai{color:var(--do)}

/* thanh tiến độ trên nền sáng */
.thanh.sang{background:var(--vien)}
.thanh.sang > i{background:var(--chinh)}