/* LiftUp Academy Practice — giao diện riêng của trang Part 5.
   Nạp SAU styles.css, app.css, site.css; chỉ thêm lớp mới tiền tố .p5- */

.ucard .p5-en { font-size: 13px; font-style: italic; color: var(--navy-2); margin: -4px 0 8px; }

/* Tóm tắt lý thuyết */
.p5-theory { border: 1px solid var(--line); border-radius: 14px; background: var(--bg-soft); margin: 4px 0 22px; }
.p5-theory summary { cursor: pointer; padding: 14px 20px; font-weight: 700; color: var(--navy); font-size: 15.5px; list-style: none; }
.p5-theory summary::-webkit-details-marker { display: none; }
.p5-theory summary::before { content: '▸'; display: inline-block; width: 18px; transition: transform .2s; }
.p5-theory[open] summary::before { transform: rotate(90deg); }
.p5-theory ol { margin: 0; padding: 4px 24px 18px 44px; }
.p5-theory li { margin: 10px 0; font-size: 15px; line-height: 1.7; color: var(--ink); }
.p5-theory li b { color: var(--navy); }

/* Chọn chế độ */
.p5-modes { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; max-width: 560px; }
.p5-mode { display: flex; flex-direction: column; gap: 2px; padding: 12px 18px; border: 1px solid var(--line); border-radius: 14px;
  background: #fff; color: var(--ink); text-decoration: none; transition: border-color .2s, background .2s; }
.p5-mode b { font-size: 15.5px; color: var(--navy); }
.p5-mode span { font-size: 13px; color: var(--muted); }
.p5-mode:hover { border-color: var(--navy); }
.p5-mode.on { background: var(--navy); border-color: var(--navy); }
.p5-mode.on b, .p5-mode.on span { color: #fff; }
.p5-mode.on span { opacity: .8; }

.tab .p5-range { opacity: .6; font-size: 12.5px; }
.tab .p5-best { font-size: 12px; font-weight: 700; }

/* Câu hỏi */
.p5-list-q { display: flex; flex-direction: column; gap: 16px; margin-top: 18px; }
.p5-q { border: 1px solid var(--line); border-radius: 14px; padding: 18px 20px; background: #fff; }
.p5-q.is-ok { border-color: var(--ok-line); }
.p5-q.is-no { border-color: var(--bad-line); }
.p5-stem { display: flex; gap: 10px; font-size: 16.5px; line-height: 1.7; color: var(--ink); }
.p5-no { font-weight: 700; color: var(--navy); flex: none; min-width: 26px; }
.p5-blank { display: inline-block; min-width: 72px; border-bottom: 2px solid var(--navy-2); color: transparent; line-height: 1.2; }
.p5-blank.filled { color: var(--ok); font-weight: 700; min-width: 0; padding: 0 3px; border-bottom-color: var(--ok); }
.p5-opts { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin: 14px 0 0 36px; }
.p5-opt { padding: 10px 14px; }
.p5-opt .p5-l { font-weight: 700; color: var(--navy-2); margin-right: 4px; }
.p5-opt.right .p5-l { color: var(--ok); }
.p5-opt.wrong .p5-l { color: var(--bad); }
.p5-opt.sel { border-color: var(--navy); background: #eef3fb; box-shadow: inset 0 0 0 1px var(--navy); }
.p5-opt:disabled { cursor: default; }

/* Giải thích */
.p5-exp { margin: 14px 0 0 36px; padding: 14px 16px; border-radius: 12px; background: var(--bg-soft); border: 1px solid var(--line);
  font-size: 14.8px; line-height: 1.7; color: var(--ink); }
.p5-exp b { color: var(--navy); font-weight: 700; }
.p5-verdict { font-weight: 500; margin-bottom: 8px; }
.p5-verdict.ok { color: var(--ok); }
.p5-verdict.no { color: var(--bad); }
.p5-verdict b { color: inherit; }
.p5-hint { display: inline-block; background: #fff; border: 1px dashed #c9d3e3; border-radius: 10px; padding: 6px 12px; margin-bottom: 6px; }
.p5-h { font-size: 11.5px; letter-spacing: .12em; text-transform: uppercase; font-weight: 700; color: var(--navy-2); margin: 12px 0 4px; }
.p5-list { margin: 0; padding: 0; list-style: none; }
.p5-list li { margin: 6px 0; padding-left: 34px; text-indent: -34px; }
.p5-list li .p5-l { display: inline-block; width: 30px; text-indent: 0; font-weight: 700; color: var(--muted); }
.p5-list li.ok .p5-l, .p5-list li.ok { color: var(--ok); }
.p5-list li.no { background: var(--bad-bg); border-radius: 8px; }
.p5-vi { color: var(--muted); }

/* Chân set */
.p5-foot { display: flex; align-items: center; justify-content: space-between; gap: 14px; flex-wrap: wrap; margin-top: 20px; }
.p5-foot .score { flex: 1; margin-top: 0; }
.p5-count { color: var(--muted); font-size: 14.5px; }
.p5-count b { color: var(--navy); }
.p5-timer { display: inline-block; margin-top: 4px; padding: 6px 14px; border: 1px solid var(--line); border-radius: 999px; font-size: 14px; color: var(--muted); }
.p5-timer b { color: var(--navy); font-variant-numeric: tabular-nums; }
.panel > .score { margin: 16px 0 4px; }

@media (max-width: 640px) {
  .p5-opts { grid-template-columns: 1fr; margin-left: 0; }
  .p5-exp { margin-left: 0; }
  .p5-stem { font-size: 16px; }
  .p5-q { padding: 16px 14px; }
  .p5-modes { grid-template-columns: 1fr 1fr; }
}

/* Trang chủ: lưới 12 chủ đề thu gọn */
.home-topics { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 10px; margin-top: 16px; }
.home-topics a { display: flex; align-items: baseline; gap: 10px; padding: 12px 16px; border: 1px solid var(--line); border-radius: 12px;
  text-decoration: none; color: var(--navy); font-weight: 500; font-size: 15px; background: #fff; transition: border-color .2s, box-shadow .2s; }
.home-topics a:hover { border-color: var(--navy); box-shadow: 0 8px 20px rgba(19,36,63,.07); }
.home-topics a span { font-size: 12px; font-weight: 700; color: var(--navy-2); opacity: .7; }