@import url('https://fonts.googleapis.com/css2?family=Noto+Serif:ital,wght@0,400;0,600;0,700;1,400&family=Be+Vietnam+Pro:wght@400;500;600;700&display=swap');.kd-wrap{--paper:#efe7d6;--paper-card:#fbfaf7;--ink:#1b1b17;--ink-soft:#5a5344;--rule:#e2d9c4;--seal:#a63a2e;--seal-dark:#832e24;--jade:#4f6b54;--bronze:#8c6a3f;--ink-dark-bg:#211f1a;background:0 0;color:var(--ink);font-family:'Noto Serif',Georgia,serif;line-height:1.75;font-size:18px;max-width:800px;margin:0 auto;padding:0 20px 8px;box-sizing:border-box}.kd-wrap *{box-sizing:border-box}.kd-wrap img,.kd-wrap svg{max-width:100%;height:auto}.kd-wrap a{color:var(--seal);text-decoration:underline;text-decoration-color:var(--rule);text-underline-offset:3px}.kd-wrap a:hover{color:var(--seal-dark)}.kd-wrap a:focus-visible,.kd-wrap button:focus-visible,.kd-wrap summary:focus-visible{outline:2px solid var(--jade);outline-offset:3px}.entry-header .entry-title,h1.entry-title,.page-header .page-title,h1.page-title{display:none !important}.kd-eyebrow{font-family:'Be Vietnam Pro',sans-serif;font-weight:600;font-size:13px;letter-spacing:.12em;text-transform:uppercase;color:var(--seal);display:inline-flex;align-items:center;gap:8px;margin:0 0 10px}.kd-eyebrow:before{content:"";width:18px;height:1px;background:var(--seal);display:inline-block}.kd-hero{margin:28px 0 34px}.kd-hero h1{font-family:'Noto Serif',Georgia,serif;font-weight:700;font-size:34px;line-height:1.28;margin:0 0 14px;color:var(--ink)}.kd-hero .kd-dek{font-size:19px;color:var(--ink-soft);font-style:italic;margin:0 0 18px}.kd-hero-figure{margin:18px 0 0;text-align:center}.kd-hero-figure figcaption{font-family:'Be Vietnam Pro',sans-serif;font-size:13px;color:var(--ink-soft);margin-top:8px}.kd-seal{display:inline-flex;align-items:center;justify-content:center;width:46px;height:46px;background:var(--seal);color:#f8f2e5;font-family:'Noto Serif',serif;font-weight:700;font-size:18px;border:2px solid #f8f2e5;box-shadow:0 0 0 1.5px var(--seal);transform:rotate(-3deg);flex:none}.kd-badges{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0 0;padding:0;list-style:none}.kd-badge{font-family:'Be Vietnam Pro',sans-serif;font-size:13px;font-weight:500;color:var(--ink);background:var(--paper-card);border:1px solid var(--rule);border-radius:999px;padding:7px 14px;display:inline-flex;align-items:center;gap:6px}.kd-badge b{font-weight:700;color:var(--seal)}.kd-callout{background:var(--paper-card);border-left:4px solid var(--seal);border-radius:2px;padding:18px 20px;margin:24px 0}.kd-callout p:last-child{margin-bottom:0}.kd-callout--jade{border-left-color:var(--jade)}.kd-toc{background:var(--paper-card);border:1px solid var(--rule);padding:18px 22px;margin:26px 0}.kd-toc-title{font-family:'Be Vietnam Pro',sans-serif;font-weight:700;font-size:13px;text-transform:uppercase;letter-spacing:.08em;color:var(--ink-soft);margin:0 0 10px}.kd-toc ol{margin:0;padding-left:20px}.kd-toc li{margin:4px 0}.kd-wrap h2{font-family:'Noto Serif',serif;font-weight:700;font-size:25px;margin:40px 0 14px;padding-bottom:10px;border-bottom:2px solid var(--rule)}.kd-wrap h3{font-family:'Noto Serif',serif;font-weight:600;font-size:20px;margin:28px 0 10px;color:var(--ink)}.kd-module{border:1px solid var(--rule);background:var(--paper-card);padding:22px 24px;margin:20px 0}.kd-module-head{display:flex;align-items:center;gap:14px;margin-bottom:12px}.kd-module-head h3{margin:0;font-size:19px}.kd-module-desc{color:var(--ink-soft);font-size:16px;margin:0 0 14px}.kd-lesson-list{margin:0;padding-left:0;list-style:none}.kd-lesson-list li{border-top:1px dashed var(--rule);padding:10px 0;display:flex;gap:10px;align-items:baseline}.kd-lesson-list li:first-child{border-top:none}.kd-lesson-list .kd-lesson-num{font-family:'Be Vietnam Pro',sans-serif;font-size:13px;color:var(--ink-soft);flex:none;width:34px}.kd-lesson-list a{font-weight:600}.kd-figure{background:var(--paper-card);border:1px solid var(--rule);padding:18px;margin:26px 0;text-align:center}.kd-figure figcaption{font-family:'Be Vietnam Pro',sans-serif;font-size:13.5px;color:var(--ink-soft);margin-top:10px}.kd-figure-row{display:flex;gap:18px;flex-wrap:wrap}.kd-figure-row .kd-figure{flex:1 1 260px}.kd-video{margin:26px 0}.kd-video-frame{position:relative;width:100%;padding-top:56.25%;background:var(--ink-dark-bg);overflow:hidden}.kd-video-frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0}.kd-video-placeholder{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;color:#efe7d6;font-family:'Be Vietnam Pro',sans-serif;font-size:14px;padding:20px;gap:8px}.kd-video figcaption{font-family:'Be Vietnam Pro',sans-serif;font-size:13.5px;color:var(--ink-soft);margin-top:10px}.kd-checklist{list-style:none;margin:20px 0;padding:0}.kd-checklist li{display:flex;gap:12px;padding:9px 0;border-top:1px dashed var(--rule)}.kd-checklist li:first-child{border-top:none}.kd-checklist li:before{content:"✓";flex:none;width:24px;height:24px;background:var(--jade);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:13px;margin-top:2px}.kd-faq{margin:22px 0}.kd-faq details{border-top:1px solid var(--rule);padding:14px 0}.kd-faq details:last-child{border-bottom:1px solid var(--rule)}.kd-faq summary{cursor:pointer;font-weight:600;font-size:17px;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px}.kd-faq summary::-webkit-details-marker{display:none}.kd-faq summary:after{content:"+";font-family:'Be Vietnam Pro',sans-serif;font-size:20px;color:var(--seal);flex:none;transition:transform .2s ease}.kd-faq details[open] summary:after{transform:rotate(45deg)}.kd-faq .kd-faq-a{color:var(--ink-soft);margin-top:10px;padding-right:30px}@media (prefers-reduced-motion:reduce){.kd-faq summary:after{transition:none}}.kd-nav{display:grid;grid-template-columns:1fr 1fr 1fr;gap:14px;margin:44px 0 24px}.kd-nav-item{border:1px solid var(--rule);background:var(--paper-card);padding:16px 18px;display:flex;flex-direction:column;gap:6px;min-height:92px;transition:transform .15s ease,box-shadow .15s ease}.kd-nav-item:hover{transform:translateY(-2px);box-shadow:0 4px 0 var(--rule)}.kd-nav-item .kd-nav-label{font-family:'Be Vietnam Pro',sans-serif;font-size:12px;text-transform:uppercase;letter-spacing:.08em;color:var(--ink-soft)}.kd-nav-item .kd-nav-title{font-weight:600;font-size:15.5px}.kd-nav-item,.kd-nav-item:link,.kd-nav-item:visited{text-decoration:none;color:var(--ink)}.kd-nav-item--empty{opacity:.45}.kd-nav-item--hub{background:var(--ink-dark-bg);border-color:var(--ink-dark-bg);color:#f8f2e5 !important}.kd-nav-item--hub .kd-nav-label{color:#c9bfa4}.kd-nav-item--hub .kd-nav-title{color:#f8f2e5 !important}.kd-nav-item--hub:hover{box-shadow:0 4px 0 var(--seal)}@media (prefers-reduced-motion:reduce){.kd-nav-item{transition:none}.kd-nav-item:hover{transform:none}}@media (max-width:720px){.kd-wrap{font-size:16.5px;padding:0 14px 4px}.kd-hero h1{font-size:26px}.kd-nav{grid-template-columns:1fr}.kd-figure-row{flex-direction:column}}.kd-cast-btn{display:block;width:100%;max-width:360px;margin:20px auto;padding:16px 24px;font-family:'Be Vietnam Pro',sans-serif;font-weight:700;font-size:16px;letter-spacing:.02em;color:#fff;background:#a63a2e;border:none;border-radius:3px;cursor:pointer;transition:background .15s ease}.kd-cast-btn:hover{background:#832e24}.kd-cast-btn:active{transform:translateY(1px)}.kd-result{margin-top:30px}.kd-result-grid{display:flex;justify-content:center;align-items:flex-start;gap:36px;flex-wrap:wrap}.kd-result-col{text-align:center;min-width:180px}.kd-result-col svg{max-width:160px}.kd-hex-name{font-family:'Noto Serif',serif;font-weight:700;font-size:20px;margin:10px 0 4px}.kd-hex-link{font-family:'Be Vietnam Pro',sans-serif;font-size:14px}#kd-history{margin:16px 0}.kd-history-item{display:flex;justify-content:space-between;gap:12px;padding:10px 14px;border-top:1px dashed #e2d9c4;font-family:'Be Vietnam Pro',sans-serif;font-size:14px}.kd-history-item:first-child{border-top:none}.kd-history-empty{color:#5a5344;font-style:italic;font-size:14px}.kd-clear-btn{font-family:'Be Vietnam Pro',sans-serif;font-size:13px;color:#5a5344;background:0 0;border:1px solid #e2d9c4;border-radius:3px;padding:8px 14px;cursor:pointer;margin-top:10px}.kd-clear-btn:hover{border-color:#a63a2e;color:#a63a2e}.kd-tamthe-list{margin:20px 0;padding-left:0;list-style:none;counter-reset:tamthe}.kd-tamthe-list li{counter-increment:tamthe;position:relative;padding:4px 0 4px 44px;margin-bottom:16px;line-height:1.7}.kd-tamthe-list li:before{content:counter(tamthe);position:absolute;left:0;top:2px;width:28px;height:28px;border-radius:50%;background:#a63a2e;color:#fff;font-family:'Be Vietnam Pro',sans-serif;font-weight:700;font-size:14px;display:flex;align-items:center;justify-content:center}.kd-luan-giai{margin-top:36px;padding-top:28px;border-top:1px solid #e2d9c4;text-align:left}.kd-luan-giai h3{font-family:'Noto Serif',serif;font-weight:700;font-size:19px;margin:0 0 14px}.kd-lg-block{margin-bottom:20px}.kd-lg-label{font-family:'Be Vietnam Pro',sans-serif;font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:#a63a2e;font-weight:700;margin:0 0 6px}.kd-lg-hao-item{display:flex;gap:10px;padding:8px 0;border-top:1px dashed #e2d9c4;font-size:14.5px}.kd-lg-hao-item:first-child{border-top:none}.kd-lg-hao-tag{flex:none;font-family:'Be Vietnam Pro',sans-serif;font-weight:700;font-size:12px;color:#fff;background:#a63a2e;border-radius:3px;padding:3px 8px;height:fit-content}.kd-lg-questions{list-style:none;padding:0;margin:0;counter-reset:lgq}.kd-lg-questions li{counter-increment:lgq;position:relative;padding:6px 0 6px 30px;font-size:14.5px}.kd-lg-questions li:before{content:counter(lgq) ".";position:absolute;left:0;top:6px;color:#a63a2e;font-weight:700;font-family:'Be Vietnam Pro',sans-serif;font-size:13px}.kd-cautruc{font-size:14.5px}.kd-cautruc-title{font-family:'Noto Serif',serif;font-weight:700;font-size:16px;margin:0 0 10px;color:#1b1b17}.kd-cautruc-table{width:100%;border-collapse:collapse;margin:10px 0 16px;font-family:'Be Vietnam Pro',sans-serif;font-size:13.5px}.kd-cautruc-table th,.kd-cautruc-table td{border:1px solid #e2d9c4;padding:6px 10px;text-align:center}.kd-cautruc-table th{background:#efe7d6;font-weight:700;color:#5a5344;text-transform:uppercase;font-size:11.5px;letter-spacing:.04em}.kd-cautruc-table tr.kd-cautruc-dong td{background:#fbefea;color:#832e24;font-weight:600}.kd-cautruc-list{margin:8px 0 16px;padding-left:20px}.kd-cautruc-list li{margin:6px 0}.kd-cautruc-note{font-style:italic;color:#5a5344;font-size:13px;border-top:1px dashed #e2d9c4;padding-top:10px;margin-top:14px}.kd-cauhoi-wrap{max-width:480px;margin:0 auto 18px;text-align:left}.kd-cauhoi-label{display:block;font-family:'Be Vietnam Pro',sans-serif;font-size:13.5px;font-weight:600;color:#5a5344;margin-bottom:6px}.kd-cauhoi-input{width:100%;padding:11px 14px;font-family:'Be Vietnam Pro',sans-serif;font-size:15px;color:#1b1b17;background:#fbfaf7;border:1px solid #e2d9c4;border-radius:3px;box-sizing:border-box}.kd-cauhoi-input:focus{outline:2px solid #4f6b54;outline-offset:1px}.kd-cauhoi-hint{font-size:12.5px;color:#5a5344;font-style:italic;margin:6px 0 0}.kd-copy-wrap{text-align:center;margin:28px 0 8px}.kd-copy-btn{font-family:'Be Vietnam Pro',sans-serif;font-weight:600;font-size:15px;padding:11px 22px;background:#fbfaf7;color:#1b1b17;border:1px solid #a63a2e;border-radius:3px;cursor:pointer;transition:background .15s}.kd-copy-btn:hover{background:#f3e9dc}.kd-copy-status{display:inline-block;margin-left:10px;font-size:13.5px;color:#4f6b54;font-weight:600}.kd-thong-tin{font-family:'Be Vietnam Pro',sans-serif;font-size:14.5px;background:#fbfaf7;border:1px solid #e2d9c4;border-left:4px solid #a63a2e;padding:14px 18px;margin:0 0 20px;text-align:left}.kd-thong-tin p{margin:4px 0}.kd-thong-tin b{color:#a63a2e}.kd-thoi-vi{text-align:left;margin:0 0 26px}.kd-thoi-vi-summary{cursor:pointer;font-weight:700;font-size:14.5px}.kd-thoi-vi-list{margin:12px 0 0;padding-left:20px;font-size:14px}.kd-thoi-vi-list li{margin:6px 0}.kd-thoi-vi-note{font-style:italic;color:#5a5344;font-size:13px;margin:10px 0 0}@media (prefers-reduced-motion:reduce){.kd-cast-btn{transition:none}}.kd-mode-switch{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin:0 0 22px}.kd-mode-btn{font-family:'Be Vietnam Pro',sans-serif;font-weight:600;font-size:14px;padding:9px 16px;background:#fbfaf7;color:#5a5344;border:1px solid #e2d9c4;border-radius:999px;cursor:pointer;transition:all .15s}.kd-mode-btn:hover{border-color:#a63a2e;color:#1b1b17}.kd-mode-btn--active{background:#a63a2e;border-color:#a63a2e;color:#f8f2e5}.kd-mode-btn--active:hover{color:#f8f2e5}.kd-step-intro{max-width:520px;margin:0 auto 18px;font-size:14px;color:#5a5344;font-style:italic;text-align:left}.kd-step-status{font-family:'Be Vietnam Pro',sans-serif;font-weight:600;font-size:14px;color:#5a5344;margin-bottom:10px}.kd-step-coins{display:flex;gap:12px;justify-content:center;margin:20px 0}.kd-coin-wrap{display:flex;flex-direction:column;align-items:center;gap:5px}.kd-coin{width:62px;height:62px;border-radius:50%;display:flex;align-items:center;justify-content:center;filter:drop-shadow(0 2px 3px rgba(27,27,23,.28))}.kd-coin-svg{width:100%;height:100%;display:block}.kd-coin-pt{font-family:'Be Vietnam Pro',sans-serif;font-size:11.5px;color:#8c6a3f}.kd-step-result{font-family:'Be Vietnam Pro',sans-serif;font-size:15px;color:#1b1b17;min-height:22px;margin:0 0 22px}.kd-step-stack{display:flex;flex-direction:column;gap:8px;max-width:320px;margin:0 auto}.kd-step-line{display:flex;align-items:center;gap:12px}.kd-step-line-bar{flex:1;height:11px;display:flex;gap:6px}.kd-step-line-seg{flex:1;border-radius:2px;background:#1b1b17}.kd-step-line-seg--dong{background:#a63a2e}.kd-step-line-label{font-family:'Be Vietnam Pro',sans-serif;font-size:12.5px;color:#5a5344;min-width:168px;text-align:left}.kd-manual-row{max-width:620px;margin:0 auto 16px;padding:14px 16px;background:#fbfaf7;border:1px solid #e2d9c4;border-radius:10px;text-align:left}.kd-manual-row-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px;flex-wrap:wrap;gap:6px}.kd-manual-row-label{font-family:'Noto Serif',Georgia,serif;font-weight:700;font-size:15px;color:#1b1b17}.kd-manual-row-total{font-family:'Be Vietnam Pro',sans-serif;font-size:13px;color:#8c6a3f;font-weight:600}.kd-manual-coins{display:flex;gap:22px;flex-wrap:wrap;justify-content:center}.kd-manual-coin-wrap{align-items:center}.kd-manual-coin-label{font-family:'Be Vietnam Pro',sans-serif;font-size:12px;color:#5a5344}.kd-manual-coin-btn{padding:0;background:0 0;border:none;cursor:pointer}.kd-coin--unset{filter:none;border-radius:50%;background:repeating-conic-gradient(#e2d9c4 0% 25%,#efe7d6 0% 50%) 50%/14px 14px;border:2px dashed #c7bb9e;position:relative}.kd-coin--unset:after{content:"?";position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-family:'Noto Serif',Georgia,serif;font-weight:700;font-size:20px;color:#8c6a3f}.kd-manual-coin-pt{min-height:16px}.kd-manual-hint{max-width:520px;margin:4px auto 16px;font-size:13.5px;color:#a63a2e;font-weight:600;min-height:18px}