/* Giao diện "New Media": nền đen, khối giấy ngà và khối xanh rêu có ánh sáng mờ, chữ serif.
   Token đặt trên body (thắng mọi token :root kể cả chế độ tối), khối giấy đặt lại token chữ tối. */
:root{color-scheme:dark}
html{background:#050605}
body{
  --bg:#050605; --surface:#121513; --sand:#1B1F1C; --ink:#EEEFEA; --ink2:#B7BEB8; --muted:#848C86; --line:#262B27;
  --accent:#9ED3B0; --accent2:#BFE3CB; --ok:#7CCB9C; --shadow:none;
  --c1:#7FC09B; --c2:#73B6C2; --c3:#6CC594; --c4:#9FAEDB; --c5:#D9B26A; --c6:#EE806F; --c7:#64C4B8; --c8:#E39A86; --c9:#93BBA9; --c10:#B4C771;
  --t1:#16301F; --t2:#132C31; --t3:#14301E; --t4:#1D2234; --t5:#2E2614; --t6:#33191A; --t7:#112E2B; --t8:#301D18; --t9:#172A23; --t10:#232A12;
  --spine:#B7BEB8; --headbg:#F4F3EE; --headink:#0F3324;
  --deep:#0F3324; --mint:#BFE3CB; --paper:#F4F3EE;
  --serif:"Newsreader","Noto Serif",Georgia,serif;
  --sans:"Inter","Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",sans-serif;
  background:#050605; color:var(--ink);
}
/* các khối giấy ngà */
.fish-card,.idea,.res,.prac,.pager a,.st-sec,.doc,.remember,.map2,.cc,.ph,.rd,.gloss div,.drawer,.results,.tiles .tile:nth-child(even),.vitem,.mlc,.g-step,.toast,.sec-paper{
  --bg:#EAEAE3; --surface:#F4F3EE; --sand:#E4E6DF; --ink:#13241C; --ink2:#47544C; --muted:#78837B; --line:#D5D8CF;
  --accent:#1D5A40; --accent2:#8DC3A1; --ok:#2C7A52;
  --c1:#1D5A40; --c2:#2B6C78; --c3:#2E7A4E; --c4:#56658A; --c5:#A07A35; --c6:#C2493A; --c7:#2E7E76; --c8:#8E4A3A; --c9:#3F6457; --c10:#6B7D35;
  --t1:#DDE9E1; --t2:#DCE9EC; --t3:#DEEDE2; --t4:#E2E5EE; --t5:#F1E9D8; --t6:#F5E0DB; --t7:#DAECE9; --t8:#EFE1DC; --t9:#DFE7E3; --t10:#E8ECD9;
  --spine:#13241C; --headbg:#123D2C; --headink:#F4F3EE;
  background:var(--surface); color:var(--ink); border-color:transparent;
}
html,body{font-family:var(--sans);font-size:15.5px;-webkit-font-smoothing:antialiased}
h1,h2,h3,.doc h1,.doc h2,.doc h3,.sec h2,.lib-h h2{font-family:var(--serif);font-weight:400;letter-spacing:-.015em}
h1{font-size:clamp(34px,5vw,60px);line-height:1.04;font-weight:400}
.kicker{font-family:var(--sans);font-size:11px;font-weight:600;letter-spacing:.14em;text-transform:uppercase}
a{color:inherit}

/* thanh trên trên nền đen */
.top{background:rgba(5,6,5,.86);border-bottom:1px solid #1A1D1B}
.brand{font-family:var(--serif);font-weight:500;font-size:19px;letter-spacing:-.01em}
.nav a{font-weight:500;font-size:13px;border-radius:4px;color:var(--ink2);letter-spacing:.01em}
.nav a.on{background:var(--paper);color:#13241C}
.nav a:hover:not(.on){background:#1B1F1C;color:var(--ink)}
.search input{border-radius:4px;background:#121513;border-color:#262B27}

/* khối: góc nhỏ, phẳng, khoảng cách đều như lưới slide */
.fish-card,.step,.idea,.res,.prac,.pager a,.st-sec,.doc,.remember,.map2,.map-card,.cc,.tile,.ph,.wc,.rd,.gloss div,.g-step,.lv-h,.lv-b,.lane,.tree-g,.nd2,.bigc,.gate,.train,.ph-k div,.coach,.hero,.lhero{border-radius:6px}
.fish-card,.idea,.res,.st-sec,.cc,.ph,.rd,.gloss div,.pager a,.prac,.doc{border:0;box-shadow:none}
.grid{gap:16px}
.btn,.chip,.flowbar button{border-radius:4px}
.btn{font-weight:500}
.btn.pri{background:var(--deep);border-color:var(--deep);color:#F4F3EE}
.chip{font-weight:500}
.res .ri{border-radius:4px}

/* HERO: khối xanh có vệt sáng, chữ neo dưới, đường kẻ mảnh, nhãn nhỏ trên cùng */
.hero,.lhero{position:relative;overflow:hidden;isolation:isolate;background:var(--deep);color:#F4F3EE;border:0;padding:30px 40px 30px;margin:20px 0 16px;min-height:380px;display:flex;flex-direction:column}
.hero::before,.lhero::before{content:"";position:absolute;inset:-25%;z-index:-1;filter:blur(46px);transform:rotate(-14deg);
  background:
    radial-gradient(28% 55% at 72% 28%,rgba(196,232,206,.55),transparent 62%),
    radial-gradient(22% 60% at 86% 62%,rgba(98,170,128,.65),transparent 62%),
    radial-gradient(40% 40% at 18% 92%,rgba(28,104,72,.85),transparent 62%),
    radial-gradient(18% 70% at 58% 70%,rgba(230,246,234,.30),transparent 60%),
    linear-gradient(115deg,#0E2F21 0%,#174A35 45%,#0E2F21 100%)}
.hero::after,.lhero::after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(180deg,rgba(9,30,21,0) 35%,rgba(9,30,21,.5));pointer-events:none}
.hero .kicker,.lhero .tag{margin-bottom:auto;padding-bottom:40px;color:#F4F3EE;font-weight:600}
.hero h1,.lhero h1{color:#F7F6F1;margin:0 0 18px;max-width:980px}
.hero .lead,.lhero p{color:rgba(244,243,238,.8);font-size:14.5px;line-height:1.6;max-width:none;border-top:1px solid rgba(244,243,238,.32);padding-top:14px;margin:0}
.hero .lead b{color:#fff}
.hero a{color:var(--mint)}
.hero .steps{margin-top:22px}
.hero .step{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);color:#F4F3EE}
.hero .step b{font-family:var(--serif);font-weight:400;font-size:19px}
.hero .step span{color:rgba(244,243,238,.72);font-size:13px}
.hero .step .ic{background:transparent;border:1px solid rgba(255,255,255,.3);color:#fff;font-family:var(--serif);font-weight:400;font-size:17px;border-radius:4px}
.hero .progress-line{color:rgba(244,243,238,.75);font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;margin-top:18px}
.hero .bar{background:rgba(255,255,255,.15);height:3px}
.hero .bar i{background:var(--mint)}
.hero .toolbar{margin:18px 0 0}
.hero .btn,.lhero .btn{background:rgba(255,255,255,.07);border-color:rgba(255,255,255,.25);color:#F4F3EE}
.hero .btn:hover,.lhero .btn:hover{background:rgba(255,255,255,.15)}
.hero .btn.pri,.lhero .btn.c{background:#F4F3EE;border-color:#F4F3EE;color:var(--deep)}
.lhero .tag{letter-spacing:.14em;font-size:11px;text-transform:uppercase;display:flex}
.lhero .tag .n{background:#F4F3EE;color:var(--deep);font-family:var(--serif);font-size:15px;font-weight:500;border-radius:4px}
.lhero .acts{margin-top:18px}

/* tiêu đề trên nền đen */
.sec h2,.lib-h h2{font-size:32px;color:var(--ink)}
.lib-h h3{font-family:var(--serif);font-weight:400;font-size:24px}
.sec .sub,.note{color:var(--muted)}
.tabs{border-color:#262B27}
.tabs button{font-weight:500;letter-spacing:.02em;color:var(--muted)}
.tabs button.on{color:var(--ink);border-color:var(--ink)}
.foot{font-size:11px;letter-spacing:.1em;text-transform:uppercase;line-height:1.8;border-color:#1A1D1B}

/* bố cục chữ trong khối: tiêu đề serif trên, đường kẻ mảnh, nhãn nhỏ viết hoa */
.idea{padding:22px 22px 20px;gap:12px}
.idea h3{font-family:var(--serif);font-weight:400;font-size:22px;line-height:1.2;padding-bottom:12px;border-bottom:1px solid var(--line)}
.idea h3 .k{background:transparent;border:1px solid var(--line);color:var(--muted);font-family:var(--sans);font-size:11px;font-weight:600;border-radius:4px}
.idea p{font-size:13.5px;line-height:1.6}
.st-sec{padding:24px 24px 18px;border-top:0}
.st-sec h3{font-family:var(--serif);font-weight:400;font-size:24px;padding-bottom:12px;border-bottom:1px solid var(--line);margin-bottom:6px}
.st-row{font-size:13.5px}
.st-row .q{font-size:11px;letter-spacing:.1em;text-transform:uppercase;font-weight:600}
.res{padding:16px 18px}
.res b{font-family:var(--serif);font-weight:500;font-size:17px}
.res small{font-size:12px}
.pager a b{font-family:var(--serif);font-weight:400;font-size:20px}
.pager a small{font-size:10.5px;letter-spacing:.12em;text-transform:uppercase}
.cc{padding:22px 24px}
.cc h3{font-family:var(--serif);font-weight:400;font-size:22px;padding-bottom:10px;border-bottom:1px solid var(--line);margin-bottom:12px}
.fish-card{padding:16px}
.fish-legend{font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.prac{padding:24px}
.field label{font-family:var(--serif);font-weight:500;font-size:17px}
.field textarea,.field input[type=text],.field select{border-radius:4px}
.remember{border:1px solid var(--line)}
.doc{padding:30px 36px}

/* SỐ LIỆU kiểu "2B+ / 480+": dải liền, số serif mảnh to */
.tiles{gap:0;border-radius:6px;overflow:hidden}
.tile{border:0;border-radius:0;padding:22px 18px 18px;min-height:150px;justify-content:flex-start}
.tile .ti{display:none}
.tile b{font-family:var(--serif);font-size:42px;font-weight:300;line-height:1;letter-spacing:-.02em;margin-bottom:auto;padding-bottom:22px}
.tile span{font-size:12.5px;font-weight:500}
.tile small{font-size:11.5px}
.tiles .tile:nth-child(odd){background:var(--deep);color:#F4F3EE}
.tiles .tile:nth-child(odd) small,.tiles .tile:nth-child(odd) span{color:rgba(244,243,238,.72)}
.tiles .tile:nth-child(even) b{color:#13241C}

/* LỘ TRÌNH: khối giấy, tuần dạng cột có đường kẻ và vạch như "How an Engagement Works" */
.ph{padding:26px 28px}
.ph-h{align-items:flex-start}
.ph-n{background:transparent;color:var(--pc);border:1px solid var(--pc);font-family:var(--serif);font-weight:400;font-size:20px;border-radius:4px;width:40px;height:40px}
.ph-h h2{font-family:var(--serif);font-weight:400;font-size:30px;color:var(--ink);line-height:1.15}
.ph-h small{font-size:13px}
.ph-k{gap:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:20px 0 26px}
.ph-k div{background:transparent;border-radius:0;padding:12px 10px 10px;border-left:1px solid var(--line)}
.ph-k div:first-child{border-left:0;padding-left:0}
.ph-k b{font-family:var(--serif);font-size:28px;font-weight:300;color:var(--ink)}
.ph-k span{font-size:10.5px;letter-spacing:.08em;text-transform:uppercase}
.wk{gap:0}
.wc{background:transparent;border:0;border-radius:0;padding:0 18px 0 0}
.wc-h{font-size:10.5px;letter-spacing:.12em}
.wn{color:var(--pc)}
.wc h3{font-family:var(--serif);font-weight:400;font-size:21px;margin:6px 0 22px;padding-bottom:14px;border-bottom:1px solid var(--ink2);position:relative;margin-right:-18px;padding-right:18px}
.wc h3::after{content:"";position:absolute;left:0;bottom:-19px;width:1px;height:18px;background:var(--ink2)}
.wc ul{font-size:13px;line-height:1.55;padding-left:16px}
.wo em{background:var(--sand);border-radius:3px;font-weight:600}
.wl a{font-size:12px}
.train,.gate{border-radius:4px;background:var(--sand);border:0;font-size:13.5px}
.train{border-left:3px solid var(--pc)}
.gate{border:1px dashed var(--pc);background:transparent}
.ph-ar{color:#3A403B}
.fun-l{font-size:12px;letter-spacing:.06em;text-transform:uppercase;font-weight:600}
.rd{padding:16px 14px}
.rd b{font-family:var(--serif);font-weight:400;font-size:24px;color:var(--accent)}
.rd strong{font-family:var(--serif);font-weight:500;font-size:16px}
.rhythm{gap:12px}

/* BẢN ĐỒ */
.map2{padding:22px}
.flowbar button{background:transparent;color:var(--ink);font-weight:500}
.flowbar button.on,.flowbar button:hover{background:var(--fc);color:#0B0D0B}
.flownote{color:var(--muted)}
.goal2 b,.nd2.goal2 b{font-family:var(--serif);font-weight:400;font-size:22px;letter-spacing:0}
.lv-h b{font-family:var(--serif);font-weight:500;font-size:16px;letter-spacing:0}
.lv-no,.tree-h,.bigc dt{font-size:10.5px;letter-spacing:.12em;font-weight:600}
.nd2 b{font-family:var(--serif);font-weight:500;font-size:16px}
.bigc-h b{font-family:var(--serif);font-weight:400;font-size:22px}
.howto{color:var(--ink2)}
.howto b{color:var(--ink);font-weight:600}
.gloss b{font-family:var(--serif);font-weight:500;font-size:17px}
.gloss div{padding:14px 16px}
.gloss span{font-size:13px}

/* NGĂN CHI TIẾT */
.drawer{border-left:3px solid var(--lc)}
.drawer h2{font-family:var(--serif);font-weight:400;font-size:32px;line-height:1.1;padding-bottom:12px;border-bottom:1px solid var(--line)}
.drawer h3,.dr-k,.dr-ex b{font-size:10.5px;letter-spacing:.14em;font-weight:600}
.drawer .chip{background:var(--sand);color:var(--ink)}
.dr-ex,.dr-key{border-radius:4px}

/* mũi tên trên khối giấy */
#edgeSvg .eg{stroke:#CBD0C6}
#edgeSvg .ahg{fill:#CBD0C6}

/* điện thoại */
@media (max-width:760px){
  .hero,.lhero{padding:22px 20px 22px;min-height:300px;margin:14px 0 12px}
  .hero .kicker,.lhero .tag{padding-bottom:26px}
  .tile{min-height:120px;padding:16px 14px}
  .tile b{font-size:32px;padding-bottom:14px}
  .ph{padding:18px 16px}
  .ph-k div:nth-child(odd){border-left:0;padding-left:0}
  .ph-k div{border-bottom:1px solid var(--line)}
  .wc{padding:0 0 18px}
  .wc h3{margin-right:0;padding-right:0}
  .doc{padding:20px 18px}
  .sec h2,.lib-h h2{font-size:26px}
}
.drawer h3,.st-sec h3 a{font-family:var(--sans)}
.drawer h3{font-size:10.5px;letter-spacing:.14em;font-weight:600;text-transform:uppercase;color:var(--ink2)}
#map2 #edgeSvg .eg.eg{stroke:#CBD0C6}
#map2 #edgeSvg .ahg.ahg{fill:#CBD0C6}
#map2 #edgeSvg.act .eg.on{stroke:#13241C}
#map2.flowing #edgeSvg.act .eg.on{stroke:var(--fc)}
/* ===== Bản đồ: tầng theo bảng xanh (tầng 0 đậm nhất → tầng 7 nhạt nhất) ===== */
.lv[data-l="0"]{--band:#051F20;--bink:#DAF1DE;--bsub:rgba(218,241,222,.7)}
.lv[data-l="1"]{--band:#0B2B26;--bink:#DAF1DE;--bsub:rgba(218,241,222,.7)}
.lv[data-l="2"]{--band:#163832;--bink:#DAF1DE;--bsub:rgba(218,241,222,.72)}
.lv[data-l="3"]{--band:#235347;--bink:#DAF1DE;--bsub:rgba(218,241,222,.75)}
.lv[data-l="4"]{--band:#3D6B5C;--bink:#F2FAF3;--bsub:rgba(242,250,243,.8)}
.lv[data-l="5"]{--band:#5E8F78;--bink:#F2FAF3;--bsub:rgba(242,250,243,.85)}
.lv[data-l="6"]{--band:#8EB69B;--bink:#051F20;--bsub:rgba(5,31,32,.72)}
.lv[data-l="7"]{--band:#DAF1DE;--bink:#051F20;--bsub:rgba(5,31,32,.7)}
.map2 .lv-h,.map2 .lv-b{background:var(--band);border-left:0}
.map2 .lv-h b,.map2 .lv-no{color:var(--bink)}
.map2 .lv-h small{color:var(--bsub)}
.map2 .lv-no{opacity:.7}
.map2 .lane{background:rgba(255,255,255,.08);border-top-width:3px}
.map2 .lv[data-l="6"] .lane,.map2 .lv[data-l="7"] .lane{background:rgba(255,255,255,.35)}
.map2 .lane-tag{color:var(--bink)}
.map2 .tree-g{background:rgba(255,255,255,.05);border-color:rgba(218,241,222,.3)}
.map2 .tree-h{color:var(--bink)}
.map2 .tree-h small{color:var(--bsub)}
.map2 .loopnote{color:var(--bsub)}
.map2 .lv .ar{color:var(--bsub)}
.map2 .nd2:not(.bigc){border-color:transparent}
.map2 .lane .nd2:not(.bigc){border-color:var(--lc)}
.map2 .nd2.goal2{background:#051F20;border-color:#051F20;color:#DAF1DE}
.map2 .nd2.goal2 small{color:rgba(218,241,222,.75)}
/* mũi tên: ẩn mặc định, chỉ hiện khi bấm ô hoặc chọn luồng */
#map2 #edgeSvg .eg.eg{opacity:0;stroke:#E4572E;stroke-width:2.4}
#map2 #edgeSvg.act .eg.on{opacity:1;stroke:#E4572E}
#map2.flowing #edgeSvg.act .eg.on{stroke:var(--fc)}
#map2 #edgeSvg .ahd{fill:#E4572E}
#map2.flowing #edgeSvg .ahd{fill:var(--fc)}
.drawer-back{background:rgba(5,6,5,.18)}
/* sao vàng cho điểm then chốt */
.nd2 .star{background:#F5C518;color:#3A2A00;box-shadow:0 0 0 3px rgba(245,197,24,.28),0 2px 6px rgba(0,0,0,.25);width:24px;height:24px;font-size:13px}
.map2 .nd2.key{box-shadow:0 0 0 2px #F5C518}
.map2 .nd2.key.dim{box-shadow:none}
.dr-key{background:#FFF7D6;border-color:#F5C518}
.dr-key b{color:#8A6A00}
.flowbar button[data-flow="key"]{--fc:#F5C518 !important}
.flowbar button[data-flow="key"].on,.flowbar button[data-flow="key"]:hover{color:#3A2A00}
.drawer.left{left:0;right:auto;border-left:0;border-right:3px solid var(--lc);transform:translateX(-105%)}
.drawer.left.open{transform:none}
.drawer.left .dr-x{right:12px}
/* v70: màu theo số tầng hiển thị (tầng 1 lõi đậm nhất → tầng 9 nhạt nhất) */
.lv[data-n="1"]{--band:#051F20;--bink:#DAF1DE;--bsub:rgba(218,241,222,.7)}
.lv[data-n="2"]{--band:#0B2B26;--bink:#DAF1DE;--bsub:rgba(218,241,222,.7)}
.lv[data-n="3"]{--band:#163832;--bink:#DAF1DE;--bsub:rgba(218,241,222,.72)}
.lv[data-n="4"]{--band:#235347;--bink:#DAF1DE;--bsub:rgba(218,241,222,.75)}
.lv[data-n="5"]{--band:#2F5F50;--bink:#F2FAF3;--bsub:rgba(242,250,243,.8)}
.lv[data-n="6"]{--band:#3D6B5C;--bink:#F2FAF3;--bsub:rgba(242,250,243,.8)}
.lv[data-n="7"]{--band:#5E8F78;--bink:#F2FAF3;--bsub:rgba(242,250,243,.85)}
.lv[data-n="8"]{--band:#8EB69B;--bink:#051F20;--bsub:rgba(5,31,32,.72)}
.lv[data-n="9"]{--band:#DAF1DE;--bink:#051F20;--bsub:rgba(5,31,32,.7)}
.map2 .lv[data-n="8"] .lane,.map2 .lv[data-n="9"] .lane{background:rgba(255,255,255,.35)}
.map2 .lv[data-n="1"] .lane,.map2 .lv[data-n="2"] .lane,.map2 .lv[data-n="3"] .lane,.map2 .lv[data-n="4"] .lane,.map2 .lv[data-n="5"] .lane,.map2 .lv[data-n="6"] .lane,.map2 .lv[data-n="7"] .lane{background:rgba(255,255,255,.08)}