:root { --c: #3A86FF; --c2: #FFBE0B; --bg: #0D1B2A; --ink: #14203d; --mut: #5d6a8a; --sat: env(safe-area-inset-top, 0px); }
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; height: 100%; overflow: hidden; background: var(--bg); font-family: "Be Vietnam Pro", system-ui, sans-serif; color: var(--ink); overscroll-behavior: none; }
canvas#c { position: fixed; inset: 0; touch-action: none; display: block; }
#menu { position: fixed; inset: 0; z-index: 20; display: none; overflow-y: auto; -webkit-overflow-scrolling: touch; }
#menu.on { display: block; }
button { font: inherit; cursor: pointer; color: inherit; }
.home { min-height: 100%; display: flex; flex-direction: column; align-items: center; gap: 14px; padding: calc(var(--sat) + 76px) 16px 32px; max-width: 520px; margin: 0 auto; }
.logo { text-align: center; color: #fff; text-shadow: 0 4px 18px rgba(0,0,0,.3); }
.logo .mark { width: 76px; height: 76px; margin: 0 auto 6px; border-radius: 24px; display: grid; place-items: center; font-size: 42px; background: linear-gradient(135deg, var(--c2), var(--c)); box-shadow: 0 10px 30px rgba(0,0,0,.3); transform: rotate(-8deg); }
.logo h1 { margin: 0; font-size: clamp(40px, 11vw, 60px); font-weight: 900; letter-spacing: -1px; line-height: 1; }
.logo p { margin: 4px 0 0; font-weight: 800; font-size: 18px; }
.story { color: #fff; text-align: center; font-weight: 600; margin: 0; opacity: .92; }
.btn { display: block; width: 100%; min-height: 52px; border: 0; border-radius: 18px; background: #fff; font-weight: 800; font-size: 17px; margin: 8px 0; box-shadow: 0 6px 18px rgba(0,0,0,.18); }
.btn.main { background: linear-gradient(180deg, var(--c2), var(--c)); color: #fff; }
.btn.big { min-height: 72px; font-size: 24px; font-weight: 900; }
.btn.big small { display: block; font-size: 14px; font-weight: 700; opacity: .9; }
.link { border: 0; background: rgba(255,255,255,.88); border-radius: 14px; padding: 12px 16px; font-weight: 800; width: 100%; }
.panel { background: #fff; border-radius: 22px; padding: 20px; max-width: 480px; margin: calc(var(--sat) + 70px) auto 24px; width: calc(100% - 32px); }
.panel h2 { margin: 0 0 8px; }
.panel p, .panel li { color: var(--mut); font-weight: 600; line-height: 1.5; }
.foot { color: #fff; font-size: 13px; text-align: center; opacity: .85; }
.foot a { color: #fff; }
/* ===== Khôn Ngoan — trang chính, gian, sổ bí kíp ===== */
.home { gap: 12px; }
.logo .mark { font-size: 40px; }
.btn small { display: block; font-size: 13px; font-weight: 700; opacity: .8; }
.daily { width: 100%; background: linear-gradient(160deg, #fffdf6, #fff1d0); border-radius: 22px; padding: 14px 16px 8px; box-shadow: 0 10px 30px rgba(0,0,0,.25); }
.daily .dtop { display: flex; justify-content: space-between; font-weight: 900; font-size: 15px; color: #8a5a00; }
.daily .dname { font-weight: 800; font-size: 18px; margin: 6px 0 2px; color: var(--ink); }
.daily.done { background: linear-gradient(160deg, #f2fff6, #d8f5e3); }
.daily .btn { margin: 10px 0 6px; }
.link.small { padding: 8px 12px; font-size: 14px; background: transparent; color: #6b4a00; }
.sec { color: #fff; margin: 10px 0 0; font-size: 18px; font-weight: 900; align-self: flex-start; }
.grid4 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; width: 100%; }
.gian { border: 0; border-radius: 20px; padding: 14px 12px; text-align: left; background: #fff; box-shadow: 0 8px 22px rgba(0,0,0,.22); border-top: 6px solid var(--gc); display: flex; flex-direction: column; gap: 3px; min-height: 150px; }
.gian i { font-style: normal; font-size: 30px; }
.gian b { font-size: 18px; font-weight: 900; color: var(--gc); }
.gian small { font-size: 12.5px; font-weight: 600; color: var(--mut); line-height: 1.3; }
.gian em { font-style: normal; font-size: 13px; font-weight: 800; color: var(--ink); margin-top: auto; }
.panel .back { width: auto; background: #f1f3fb; margin-bottom: 8px; }
.panel .lead { margin-top: 0; }
.panel h3 { margin: 16px 0 4px; }
.chap { border-radius: 18px; background: #faf7ef; padding: 12px; margin: 12px 0; border-left: 6px solid var(--gc, #3A86FF); }
.ch-h { display: flex; justify-content: space-between; gap: 8px; align-items: center; flex-wrap: wrap; }
.ch-h b { font-size: 16px; }
.chap p { margin: 6px 0 8px; font-size: 14px; }
.bk { font-size: 12.5px; font-weight: 800; padding: 4px 10px; border-radius: 12px; background: #e9e9ee; color: #888; }
.bk.on { background: #FFE8A3; color: #7a4f00; }
.lvs { display: flex; flex-wrap: wrap; gap: 8px; }
.lv { width: 64px; min-height: 64px; border: 0; border-radius: 16px; background: #fff; box-shadow: 0 3px 10px rgba(0,0,0,.12); display: flex; flex-direction: column; align-items: center; justify-content: center; }
.lv b { font-size: 20px; font-weight: 900; color: var(--ink); }
.lv span { font-size: 11px; color: #E0A100; letter-spacing: 1px; }
.lv.ok { background: #f1fff5; }
.lv.lock { opacity: .45; }
.bkc { display: flex; gap: 12px; padding: 12px; margin: 10px 0; border-radius: 16px; background: #f4f4f7; opacity: .7; }
.bkc.on { background: #fffaf0; opacity: 1; border-left: 6px solid var(--gc); }
.bkc i { font-style: normal; font-size: 30px; }
.bkc b { display: block; font-size: 16px; }
.bkc small { display: block; color: var(--mut); font-weight: 700; font-size: 12px; }
.bkc p { margin: 4px 0 0; font-size: 14px; }