/* =====================================================================
   FTS IMPACT LAB v6 — giao diện công khai
   Nhận diện: logo & màu FTS Impact Lab (xanh navy #003271, xanh ngọc #008c89, vàng đồng #b68a3b).
   Bố cục, phông, cỡ chữ đồng bộ Bền vững 360°: Manrope (giao diện, 15px) + Source Serif 4 (tiêu đề).
   ===================================================================== */
:root{
  --navy:#003271;--navy-2:#0b3a78;--navy-deep:#0a1f45;--blue:#1757a6;--blue-soft:#eaf1fb;
  --teal:#008c89;--teal-2:#0aa7a0;--teal-soft:#e6f4f3;--gold:#b68a3b;--gold-2:#d7b46a;--gold-soft:#f7f0e2;
  --paper:#f7f6f2;--off:#f4f6fa;--ink:#172033;--text:#22303f;--muted:#5f6d86;--line:#e1e6ee;--white:#fff;
  --ok:#1f8a4c;--warn:#c27c0e;--bad:#c2410c;
  --max:1200px;--radius:10px;--shadow:0 14px 34px rgba(0,50,113,.10);--shadow-lg:0 24px 60px rgba(0,30,80,.18);
  --serif:'Source Serif 4','Merriweather',Georgia,'Times New Roman',serif;
  --sans:'Manrope',system-ui,-apple-system,'Segoe UI',Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--sans);color:var(--text);font-size:15px;line-height:1.65;background:#fff;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
[hidden]{display:none!important}
a{color:var(--blue);text-decoration:none}a:hover{color:var(--navy)}
img{max-width:100%;height:auto}
button,input,select,textarea{font:inherit;color:inherit}button{cursor:pointer}
h1,h2,h3,h4,p{margin-top:0}
h1,h2{font-family:var(--serif);color:var(--navy);letter-spacing:-.015em;line-height:1.2}
h1{font-size:clamp(2rem,4.2vw,3.1rem);margin-bottom:16px}
h2{font-size:clamp(1.45rem,2.6vw,2.05rem);margin-bottom:12px}
h3{font-size:1.06rem;line-height:1.35;color:var(--ink);margin-bottom:6px}
p{color:#3d4b5c}
:focus-visible{outline:3px solid var(--teal-2);outline-offset:2px;border-radius:4px}
.container{max-width:var(--max);margin:0 auto;padding-left:28px;padding-right:28px}
.narrow{max-width:860px}
.skip{position:absolute;left:-9999px;z-index:999}.skip:focus{left:10px;top:10px;padding:10px;background:#fff}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.hp{position:absolute!important;left:-5000px!important;width:1px;height:1px;opacity:0}
.small{font-size:13px;color:var(--muted)}
.eyebrow{font-size:12px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--teal);margin:0 0 10px}
.eyebrow.light{color:var(--gold-2)}
.lede{font-size:17px;line-height:1.7;color:#435266;max-width:760px}
.note{font-size:13.5px;color:var(--muted);border-left:3px solid var(--gold);padding:8px 12px;background:var(--gold-soft);border-radius:0 8px 8px 0}

/* ---------- Nút ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:42px;padding:10px 20px;border-radius:8px;border:1.5px solid transparent;font-size:14px;font-weight:700;line-height:1.2;text-decoration:none;transition:background .18s,border-color .18s,color .18s,transform .18s,box-shadow .18s;white-space:nowrap}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--navy);color:#fff}.btn-primary:hover{background:var(--navy-2);color:#fff}
.btn-teal{background:var(--teal);color:#fff}.btn-teal:hover{background:#007572;color:#fff}
.btn-gold{background:var(--gold);color:#fff}.btn-gold:hover{background:#9c7430;color:#fff}
.btn-ghost{border-color:#c7d2e2;color:var(--navy);background:#fff}.btn-ghost:hover{border-color:var(--navy);color:var(--navy)}
.btn-outline-light{border-color:rgba(255,255,255,.55);color:#fff}.btn-outline-light:hover{border-color:#fff;background:rgba(255,255,255,.08);color:#fff}
.btn-lg{min-height:50px;padding:13px 24px;font-size:15px}
.btn-block{width:100%}
.btn[disabled],.btn.loading{opacity:.6;pointer-events:none}
.link-btn{border:0;background:none;color:var(--blue);padding:0;font-weight:700}
.btn-google{width:100%;border-color:#d5dbe5;background:#fff;color:var(--ink);gap:10px}.btn-google:hover{border-color:var(--navy);color:var(--navy)}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:#fff;box-shadow:0 1px 0 var(--line)}
.topbar{background:var(--navy-deep);color:#c8d4e6;font-size:12px}
.topbar-in{display:flex;justify-content:space-between;align-items:center;gap:16px;min-height:34px}
.topbar-links{display:flex;gap:18px;align-items:center}
.topbar-links a{color:#e3eaf5;display:inline-flex;align-items:center;gap:5px;font-weight:600}.topbar-links a:hover{color:var(--gold-2)}
.topbar-links .lang{border:1px solid rgba(255,255,255,.35);border-radius:4px;padding:0 8px;font-weight:800}
.mast-in{display:flex;align-items:center;gap:20px;min-height:76px}
.logo{flex:none;display:block}.logo img{display:block;height:46px;width:auto}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:12px}
.nav-link{display:inline-flex;align-items:center;gap:5px;padding:10px 12px;border-radius:8px;font-weight:700;font-size:14px;color:var(--ink);background:none;border:0}
.nav-link:hover{background:var(--off);color:var(--navy)}
.nav-link[aria-current]{color:var(--navy);box-shadow:inset 0 -3px 0 var(--teal)}
.nav-drop{position:relative}
.drop-btn svg{transition:transform .18s}.drop-btn[aria-expanded=true] svg{transform:rotate(180deg)}
.drop-panel{position:absolute;left:0;top:calc(100% + 8px);width:460px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow-lg);padding:10px;display:grid;gap:2px;z-index:70}
.drop-link{display:flex;gap:12px;padding:12px;border-radius:10px;color:var(--ink)}
.drop-link:hover{background:var(--teal-soft);color:var(--ink)}
.drop-link b{display:block;color:var(--navy);font-size:14.5px}.drop-link small{display:block;color:var(--muted);font-size:13px;line-height:1.45;margin-top:2px}
.drop-ico{flex:none;width:44px;height:44px;border-radius:10px;display:grid;place-items:center;background:var(--teal-soft);color:var(--teal)}
.mast-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.account-btn{min-height:40px;padding:8px 14px}
.account-btn img{width:24px;height:24px;border-radius:50%;object-fit:cover}
.nav-toggle{display:none;width:44px;height:44px;border:0;background:none;border-radius:8px;position:relative}
.nav-toggle span,.nav-toggle span:before,.nav-toggle span:after{position:absolute;left:11px;width:22px;height:2px;background:var(--navy);border-radius:2px;transition:transform .2s,opacity .2s;content:''}
.nav-toggle span{top:21px}.nav-toggle span:before{top:-7px;left:0}.nav-toggle span:after{top:7px;left:0}
.nav-open .nav-toggle span{background:transparent}.nav-open .nav-toggle span:before{transform:translateY(7px) rotate(45deg)}.nav-open .nav-toggle span:after{transform:translateY(-7px) rotate(-45deg)}
.user-menu{position:absolute;right:0;top:calc(100% + 8px);min-width:230px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow-lg);padding:8px;z-index:70}
.user-menu a,.user-menu button{display:block;width:100%;text-align:left;padding:9px 12px;border-radius:8px;border:0;background:none;color:var(--ink);font-weight:600;font-size:14px}
.user-menu a:hover,.user-menu button:hover{background:var(--off)}
.user-menu .um-head{padding:8px 12px 10px;border-bottom:1px solid var(--line);margin-bottom:6px}
.user-menu .um-head b{display:block;color:var(--navy)}.user-menu .um-head small{color:var(--muted)}
.acct-wrap{position:relative}

/* ---------- Hero trang chủ ---------- */
.hero{background:radial-gradient(1100px 500px at 85% -10%,rgba(10,167,160,.28),transparent 60%),linear-gradient(140deg,var(--navy-deep) 0%,var(--navy) 55%,#063b76 100%);color:#fff;overflow:hidden}
.hero-in{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:56px;align-items:center;padding-top:72px;padding-bottom:80px}
.hero .eyebrow{color:var(--gold-2)}
.hero h1{color:#fff;font-size:clamp(2.2rem,4.8vw,3.6rem);line-height:1.1;margin-bottom:20px}
.hero h1 em{font-style:normal;color:#7fe0d6}
.hero .lede{color:#d8e3f2;font-size:18px}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin:28px 0 22px}
.trust{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:8px 22px;color:#b8c8df;font-size:13.5px;font-weight:600}
.trust li:before{content:'';display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--teal-2);margin-right:8px;vertical-align:middle}
.preview-card{background:#fff;color:var(--ink);border-radius:18px;padding:24px;box-shadow:0 30px 70px rgba(0,0,0,.35);max-width:420px;margin-left:auto;transform:rotate(-1deg)}
.pc-head{display:flex;gap:16px;align-items:center;margin-bottom:18px}
.pc-ring{--p:70;width:84px;height:84px;border-radius:50%;display:grid;place-items:center;align-content:center;background:conic-gradient(var(--teal) calc(var(--p)*1%),#e6edf5 0);position:relative;flex:none}
.pc-ring:before{content:'';position:absolute;inset:8px;background:#fff;border-radius:50%}
.pc-ring b,.pc-ring small{position:relative;line-height:1}.pc-ring b{font-size:24px;color:var(--navy)}.pc-ring small{font-size:11px;color:var(--muted)}
.pc-k{margin:0;font-size:12px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}.pc-v{margin:2px 0 0;font-family:var(--serif);font-size:22px;color:var(--navy);font-weight:700}
.pc-bars{list-style:none;margin:0 0 16px;padding:0;display:grid;gap:10px}
.pc-bars li{display:grid;gap:4px;font-size:13px;font-weight:600}
.pc-bars i{display:block;height:8px;border-radius:8px;background:linear-gradient(90deg,var(--teal) var(--w),#e6edf5 var(--w))}
.pc-bars i.warn{background:linear-gradient(90deg,var(--gold) var(--w),#e6edf5 var(--w))}
.pc-tip{margin:0;font-size:13.5px;background:var(--teal-soft);border-radius:10px;padding:10px 12px;color:#21414a}
.hero-photo{margin:0;border-radius:18px;overflow:hidden;box-shadow:var(--shadow-lg);position:relative}
.hero-photo img{display:block;width:100%;height:420px;object-fit:cover}
.hero-photo figcaption{position:absolute;left:0;right:0;bottom:0;padding:40px 20px 16px;background:linear-gradient(transparent,rgba(0,20,50,.85));font-weight:700}

/* ---------- Phần trang ---------- */
.section{padding:72px 0}
.section-tight{padding:40px 0 64px}
.band{background:var(--paper)}
.sec-head{max-width:760px;margin-bottom:30px}
.sec-head.row{max-width:none;display:flex;justify-content:space-between;align-items:flex-end;gap:20px}
.sec-head.mt{margin-top:56px}
.sec-title{font-family:var(--sans);font-size:13px;font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:var(--teal);margin:34px 0 16px;padding-bottom:10px;border-bottom:1px solid var(--line)}
.more{display:inline-flex;align-items:center;gap:6px;font-weight:700;white-space:nowrap}
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:56px;align-items:start}

/* 4 công cụ */
.tool-grid{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.tool-card a{position:relative;display:flex;flex-direction:column;height:100%;padding:26px 22px 22px;border:1px solid var(--line);border-radius:16px;background:#fff;color:var(--text);transition:border-color .2s,box-shadow .2s,transform .2s}
.tool-card a:hover{border-color:var(--teal);box-shadow:var(--shadow);transform:translateY(-3px)}
.tool-num{position:absolute;right:20px;top:18px;font-family:var(--serif);font-size:20px;color:var(--gold)}
.tool-ico{width:54px;height:54px;border-radius:14px;display:grid;place-items:center;background:var(--teal-soft);color:var(--teal);margin-bottom:16px}
.tool-fit{font-size:12px;font-weight:800;color:var(--teal);text-transform:uppercase;letter-spacing:.06em;margin-bottom:6px}
.tool-card h3{font-size:1.2rem;color:var(--navy);font-weight:800}
.tool-card p{font-size:14px;line-height:1.6;flex:1}
.tool-meta{font-size:12.5px;color:var(--muted);margin:6px 0 14px}
.tool-go{display:inline-flex;align-items:center;gap:6px;font-weight:800;color:var(--navy)}

/* Các bước */
.steps{list-style:none;margin:22px 0 0;padding:0;display:grid;gap:18px}
.steps li{display:flex;gap:16px}
.step-n{flex:none;width:38px;height:38px;border-radius:50%;background:var(--navy);color:#fff;display:grid;place-items:center;font-weight:800}
.steps h3{margin-bottom:2px}.steps p{margin:0;font-size:14.5px}
.gets{background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px}
.ticks{list-style:none;margin:0 0 16px;padding:0;display:grid;gap:10px}
.ticks li{position:relative;padding-left:30px;font-size:14.5px;line-height:1.55}
.ticks li:before{content:'';position:absolute;left:0;top:2px;width:20px;height:20px;border-radius:50%;background:var(--teal-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='m6 12 4 4 8-8' fill='none' stroke='%23008c89' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/13px no-repeat}
.ticks.light li{color:#dbe6f5}.ticks.light li:before{background-color:rgba(255,255,255,.12)}

/* Tầng khung */
.layers{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.layers li{display:flex;gap:16px;align-items:center;padding:18px 20px;border:1px solid var(--line);border-radius:14px;background:#fff}
.layers span{flex:none;width:40px;height:40px;border-radius:10px;background:var(--navy);color:#fff;display:grid;place-items:center;font-weight:800}
.layers li:nth-child(2) span{background:var(--blue)}.layers li:nth-child(3) span{background:var(--teal)}.layers li:nth-child(4) span{background:var(--gold)}
.layers b{color:var(--ink)}

/* Thẻ bài */
.story-grid,.bv-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.story,.bv-card{display:flex;flex-direction:column;color:var(--text);background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:box-shadow .2s,transform .2s}
.story:hover,.bv-card:hover{box-shadow:var(--shadow);transform:translateY(-2px);color:var(--text)}
.story img,.bv-card img,.story-ph{display:block;width:100%;aspect-ratio:16/9;object-fit:cover;background:linear-gradient(135deg,var(--teal-soft),var(--blue-soft))}
.story-k,.bv-meta{font-size:12px;font-weight:700;color:var(--teal);text-transform:uppercase;letter-spacing:.05em;padding:14px 18px 0}
.story h3,.bv-card h3{font-family:var(--serif);font-size:1.12rem;color:var(--navy);padding:6px 18px 0;margin:0}
.story p,.bv-card p{font-size:14px;padding:6px 18px 18px;margin:0}
.bv-go{margin-top:auto;padding:0 18px 16px;font-weight:800;font-size:13px;color:var(--navy);display:inline-flex;gap:6px;align-items:center}
.bv360{background:linear-gradient(180deg,#fff,var(--off))}
.ads .ad-row{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.ad{position:relative;display:block;max-width:600px;border-radius:12px;overflow:hidden;border:1px solid var(--line)}
.ad img{display:block;width:100%;height:auto}
.ad-label{position:absolute;left:8px;top:8px;background:rgba(10,31,69,.75);color:#fff;font-size:11px;font-weight:700;border-radius:4px;padding:2px 7px}

/* Đơn vị */
.units{background:var(--navy-deep);padding:56px 0}
.units-in{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.unit-card{background:#13305f;border:1px solid rgba(255,255,255,.1);border-radius:16px;padding:24px 26px;color:#fff}
.unit-card img{display:block;width:min(300px,100%);margin:0 0 10px}
.unit-k{color:#7fe0d6;font-weight:800;letter-spacing:.06em;font-size:13px;margin:0 0 10px}
.unit-card h3{color:#fff;font-size:1.25rem}.unit-card p{color:#c6d3e7;font-size:14px;margin:0}.unit-sub{color:#a9bcd8!important;font-weight:700;margin-bottom:8px!important}

/* ---------- Bản tin 360 + footer ---------- */
.nl-band{background:linear-gradient(120deg,var(--teal) 0%,#00706d 100%);color:#fff}
.nl-in{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:40px;align-items:center;padding-top:44px;padding-bottom:44px}
.nl-band h2{color:#fff;margin-bottom:6px}.nl-band p{color:#dff4f2;margin:0}
.nl-row{display:flex;gap:8px}
.nl-row input{flex:1;min-height:50px;border:0;border-radius:8px;padding:0 16px;color:var(--ink)}
.check{display:flex;gap:9px;align-items:flex-start;font-size:13.5px;line-height:1.5;margin-top:10px;cursor:pointer}
.check input{margin-top:3px;width:16px;height:16px;accent-color:var(--teal);flex:none}
.check.light{color:#e2f5f3}.check.light a{color:#fff;text-decoration:underline}
.nl-msg{min-height:20px;margin-top:8px!important;font-weight:700}
.site-footer{background:var(--navy-deep);color:#c6d3e7;padding:54px 0 0;font-size:14px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.3fr;gap:36px}
.foot-brand img{display:block;width:96px;height:auto;margin-bottom:14px}
.site-footer h3{color:#fff;font-size:13px;letter-spacing:.1em;text-transform:uppercase;margin-bottom:14px}
.site-footer ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.site-footer a{color:#dbe6f5}.site-footer a:hover{color:var(--gold-2)}
.site-footer p{color:#c6d3e7}.site-footer .small{color:#94a7c4}
.foot-units .unit-v{color:#fff;font-weight:700;margin-bottom:14px}
.foot-bottom{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;border-top:1px solid rgba(255,255,255,.1);margin-top:40px;padding:18px 28px;font-size:12.5px;color:#94a7c4}

/* ---------- Trang con ---------- */
.page-hero{background:linear-gradient(180deg,var(--off),#fff);padding:28px 0 34px;border-bottom:1px solid var(--line)}
.page-hero.slim{padding:22px 0 24px}
.page-hero.center{text-align:center;padding:90px 0}
.crumbs{display:flex;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--muted);margin-bottom:18px}
.crumbs a{color:var(--muted)}.crumbs a:hover{color:var(--navy)}
.meta-row{list-style:none;margin:16px 0 0;padding:0;display:flex;flex-wrap:wrap;gap:8px 22px;font-size:14px;color:#435266}
.tool-hero-in{display:flex;gap:22px;align-items:flex-start}
.tool-hero-ico{flex:none;width:68px;height:68px;border-radius:18px;background:var(--navy);color:#fff;display:grid;place-items:center}
.tool-hero-ico svg{width:36px;height:36px}
.tool-wrap{padding:34px 0 56px;background:var(--off)}
.tool-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:26px;align-items:start}
.tool-side{display:grid;gap:16px;position:sticky;top:130px}
.side-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px}
.side-card.soft{background:var(--teal-soft);border-color:#cbe8e5}
.side-card h2{font-family:var(--sans);font-size:15px;font-weight:800;color:var(--navy);margin-bottom:12px}
.side-card p{font-size:14px}
.tool-loading{padding:40px;text-align:center;color:var(--muted)}
.faq details{border-bottom:1px solid var(--line);padding:16px 0}
.faq summary{font-weight:700;cursor:pointer;color:var(--navy);font-size:16px}
.faq details p{margin:10px 0 0}
.other-tools{margin-top:24px;font-size:14px}
.alert{background:var(--gold-soft);border:1px solid #ecd9b3;border-radius:10px;padding:12px 14px}
.alert.error{background:#fdecea;border-color:#f5c2bd;color:#8a2a1a}
.alert.ok{background:#e8f6ee;border-color:#bfe6cf;color:#145c34}
.empty{color:var(--muted);padding:30px 0}
.plain{list-style:none;margin:0;padding:0;display:grid;gap:6px}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{display:inline-flex;align-items:center;min-height:34px;padding:6px 14px;border-radius:30px;border:1px solid #cdd7e6;background:#fff;color:var(--ink);font-weight:700;font-size:13px}
.chip:hover,.chip.on{border-color:var(--navy);background:var(--navy);color:#fff}

/* Khung tham chiếu */
.fw-filter{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.fw-wrap{padding:30px 28px 64px}
.fw-layer{margin-bottom:40px}
.fw-layer-head{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.fw-layer-head h2{font-size:1.35rem;margin:0}
.layer-n{width:34px;height:34px;border-radius:9px;background:var(--navy);color:#fff;display:grid;place-items:center;font-weight:800}
.count{margin-left:auto;font-size:13px;color:var(--muted);font-weight:700}
.fw-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.fw-card{display:flex;flex-direction:column;padding:20px;border:1px solid var(--line);border-radius:14px;background:#fff;color:var(--text);transition:border-color .2s,box-shadow .2s}
.fw-card:hover{border-color:var(--teal);box-shadow:var(--shadow);color:var(--text)}
.fw-code{font-size:12px;font-weight:800;color:var(--teal);letter-spacing:.04em}
.fw-card h3{color:var(--navy);margin:4px 0 8px}
.fw-card p{font-size:13.5px;flex:1}
.fw-tags{display:flex;flex-wrap:wrap;gap:6px}.fw-tags i{font-style:normal;font-size:11.5px;font-weight:700;background:var(--off);border-radius:20px;padding:2px 9px;color:#465569}
.fw-detail{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:30px;padding-top:34px;padding-bottom:64px}
.crit-list{margin:0 0 24px;padding-left:22px;display:grid;gap:10px}
.crit-list li{padding-left:6px}.crit-list b{display:block;color:var(--ink)}.crit-list span{font-size:13px;color:var(--muted)}
.fw-side{display:grid;gap:16px;align-content:start}

/* Bài viết */
.art-hero h1{font-size:clamp(1.9rem,3.6vw,2.7rem)}
.art-meta{font-size:14px;color:var(--muted)}
.art-cover{margin:28px auto 0}.art-cover img{display:block;width:100%;border-radius:14px}
.prose{font-size:17px;line-height:1.8;padding-top:28px;padding-bottom:30px}
.prose p,.prose li{color:#2d3a49}
.prose h2{font-size:1.55rem;margin-top:34px}.prose h3{font-size:1.2rem;margin-top:24px;color:var(--navy)}
.prose img{border-radius:10px}.prose blockquote{border-left:4px solid var(--teal);margin:20px 0;padding:6px 18px;background:var(--teal-soft);border-radius:0 10px 10px 0}
.prose table{border-collapse:collapse;width:100%;font-size:15px}.prose td,.prose th{border:1px solid var(--line);padding:8px 10px}
.prose .lead{font-size:19px;color:#2d3a49}
.ed-note{background:var(--gold-soft);border-radius:12px;padding:16px 18px;margin:24px 0}
.art-cta{margin-top:34px;padding:22px;border-radius:14px;background:var(--off)}
.art-cta p{font-weight:700;color:var(--navy)}

/* ---------- Biểu mẫu ---------- */
.field{display:grid;gap:6px;margin-bottom:16px}
.field label,.field .lbl{font-weight:700;font-size:14px;color:var(--ink)}
.field .hint{font-size:13px;color:var(--muted);margin:-2px 0 2px}
input[type=text],input[type=email],input[type=password],input[type=tel],input[type=number],input[type=url],input:not([type]),select,textarea{width:100%;min-height:46px;border:1.5px solid #d3dbe7;border-radius:9px;padding:10px 14px;background:#fff;transition:border-color .15s,box-shadow .15s}
textarea{min-height:100px;resize:vertical;line-height:1.55}
input:focus,select:focus,textarea:focus{outline:0;border-color:var(--teal);box-shadow:0 0 0 3px rgba(0,140,137,.15)}
.field.invalid input,.field.invalid select,.field.invalid textarea{border-color:var(--bad)}
.field-err{color:var(--bad);font-size:13px;font-weight:600}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 16px}
fieldset{border:0;margin:0 0 26px;padding:0}
legend{font-family:var(--serif);font-size:1.3rem;font-weight:700;color:var(--navy);margin-bottom:14px}
.card-form{background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px}
.choice-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.choice{display:flex;gap:10px;align-items:flex-start;padding:12px 14px;border:1.5px solid #d8e0ec;border-radius:10px;cursor:pointer;font-size:14px;font-weight:600;transition:border-color .15s,background .15s}
.choice:hover{border-color:var(--teal)}
.choice:has(input:checked){border-color:var(--teal);background:var(--teal-soft)}
.choice input{margin-top:3px;accent-color:var(--teal)}
.chip-check{position:relative}
.chip-check input{position:absolute;opacity:0;pointer-events:none}
.chip-check span{display:inline-flex;padding:7px 13px;border:1.5px solid #d3dbe7;border-radius:30px;font-size:13px;font-weight:700;cursor:pointer;background:#fff;transition:all .15s}
.chip-check input:checked+span{background:var(--teal);border-color:var(--teal);color:#fff}
.chip-check input:focus-visible+span{outline:3px solid var(--teal-2);outline-offset:2px}
.form-msg{margin:10px 0}

/* ---------- Ứng dụng công cụ (nhiều bước) ---------- */
.tool-app{min-width:0;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:0 2px 0 rgba(0,0,0,.02)}
.wz-head{padding:22px 28px 0}
.wz-progress{display:flex;align-items:center;gap:12px;font-size:13px;font-weight:700;color:var(--muted)}
.wz-bar{flex:1;height:8px;background:var(--off);border-radius:8px;overflow:hidden}
.wz-bar i{display:block;height:100%;background:linear-gradient(90deg,var(--teal),var(--teal-2));border-radius:8px;transition:width .3s}
.wz-steps{display:flex;gap:6px;overflow-x:auto;padding:14px 0 4px;scrollbar-width:thin}
.wz-step{flex:none;border:0;background:var(--off);color:var(--muted);border-radius:30px;padding:6px 12px;font-size:12.5px;font-weight:700;white-space:nowrap}
.wz-step.on{background:var(--navy);color:#fff}.wz-step.done{background:var(--teal-soft);color:var(--teal)}
.wz-body{padding:20px 28px 8px}
.wz-body h2{font-size:1.5rem;margin-bottom:4px}
.wz-intro{color:var(--muted);margin-bottom:20px}
.wz-foot{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:16px 28px 22px;border-top:1px solid var(--line);margin-top:10px}
.wz-save{font-size:12.5px;color:var(--muted)}
.q{padding:18px 0;border-top:1px solid var(--off)}
.q:first-of-type{border-top:0}
.q-title{font-weight:700;color:var(--ink);font-size:15px;margin-bottom:4px}
.q-help{font-size:13.5px;color:var(--muted);margin-bottom:10px}
.req{color:var(--bad)}
.levels{display:grid;gap:8px}
.level{display:grid;grid-template-columns:auto 1fr;gap:12px;align-items:start;padding:11px 14px;border:1.5px solid #dde4ee;border-radius:10px;cursor:pointer;font-size:14px;line-height:1.5;transition:border-color .15s,background .15s}
.level:hover{border-color:var(--teal)}
.level:has(input:checked){border-color:var(--teal);background:var(--teal-soft)}
.level input{position:absolute;opacity:0}
.level .lv-n{width:30px;height:30px;border-radius:8px;background:var(--off);display:grid;place-items:center;font-weight:800;color:var(--navy)}
.level:has(input:checked) .lv-n{background:var(--teal);color:#fff}
.level b{display:block;color:var(--ink);font-size:13px}
.level.skip-lv{border-style:dashed}
.crit-intro{background:var(--off);border-radius:12px;padding:14px 16px;margin-bottom:6px;font-size:14px}
.crit-intro b{color:var(--navy)}
.fw-pick{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-bottom:18px}
.fw-pick label{display:flex;gap:10px;align-items:flex-start;padding:12px 14px;border:1.5px solid #dde4ee;border-radius:10px;cursor:pointer;font-size:14px}
.fw-pick label:has(input:checked){border-color:var(--teal);background:var(--teal-soft)}
.fw-pick small{display:block;color:var(--muted);font-size:12px}
.fw-rec{font-size:11px;font-weight:800;background:var(--gold);color:#fff;border-radius:4px;padding:1px 6px;margin-left:6px}
.align-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:12px;align-items:center;padding:10px 0;border-top:1px solid var(--off);font-size:14px}
.seg{display:inline-flex;border:1.5px solid #d3dbe7;border-radius:9px;overflow:hidden}
.seg label{position:relative}
.seg input{position:absolute;opacity:0}
.seg span{display:block;padding:6px 10px;font-size:12px;font-weight:700;cursor:pointer;border-left:1px solid #e2e8f1;white-space:nowrap}
.seg label:first-child span{border-left:0}
.seg input:checked+span{background:var(--navy);color:#fff}
.seg input:focus-visible+span{outline:2px solid var(--teal-2)}
.upload{border:1.5px dashed #c7d2e2;border-radius:10px;padding:14px;font-size:13.5px}

/* ---------- Kết quả ---------- */
.result-wrap{padding:26px 28px 70px}
.res-top{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:26px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px 26px;margin-bottom:20px}
.score-ring{--p:0;width:130px;height:130px;border-radius:50%;display:grid;place-items:center;align-content:center;background:conic-gradient(var(--ring,var(--teal)) calc(var(--p)*1%),#e8eef5 0);position:relative}
.score-ring:before{content:'';position:absolute;inset:11px;background:#fff;border-radius:50%}
.score-ring b,.score-ring small{position:relative;line-height:1}.score-ring b{font-size:36px;color:var(--navy)}.score-ring small{font-size:12px;color:var(--muted);margin-top:4px}
.res-top h2{margin:0 0 4px}.res-ref{font-size:13px;color:var(--muted)}
.res-actions{display:flex;flex-direction:column;gap:8px}
.badges{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0}
.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:20px;font-size:12.5px;font-weight:700;background:var(--off);color:#3c4a5c}
.badge.teal{background:var(--teal-soft);color:#00605e}.badge.gold{background:var(--gold-soft);color:#7a5a1f}.badge.navy{background:var(--blue-soft);color:var(--navy)}
.res-grid{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:20px;align-items:start}
.panel{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px 24px;margin-bottom:18px}
.panel h2{font-size:1.3rem;margin-bottom:12px}
.panel h3{margin-top:14px}
.ai-panel{border-color:#bfe2df;background:linear-gradient(180deg,#f2fbfa,#fff)}
.ai-tag{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:800;color:var(--teal);text-transform:uppercase;letter-spacing:.06em;margin-bottom:8px}
.headline{font-family:var(--serif);font-size:1.25rem;color:var(--navy);line-height:1.45;font-weight:600}
.list-cards{display:grid;gap:10px;margin:0;padding:0;list-style:none}
.list-cards li{padding:12px 14px;border-radius:10px;background:var(--off);font-size:14.5px}
.list-cards li.good{background:#ecf7f0}.list-cards li.gap{background:#fdf3e6}
.list-cards q{display:block;font-size:12.5px;color:var(--muted);margin-top:4px;quotes:'“' '”'}
.list-cards .why{display:block;font-size:13.5px;color:#4a586b;margin-top:3px}
.actions-list{counter-reset:a;list-style:none;margin:0;padding:0;display:grid;gap:10px}
.actions-list li{counter-increment:a;display:grid;grid-template-columns:34px 1fr;gap:12px;align-items:start;font-size:14.5px}
.actions-list li:before{content:counter(a);width:30px;height:30px;border-radius:8px;background:var(--navy);color:#fff;display:grid;place-items:center;font-weight:800}
.when{font-size:11.5px;font-weight:800;color:var(--gold);text-transform:uppercase;letter-spacing:.05em}
.bars{display:grid;gap:12px}
.bar-row{display:grid;grid-template-columns:minmax(0,1fr) 60px;gap:10px;align-items:center;font-size:13.5px}
.bar-row .bar{grid-column:1/-1;height:8px;border-radius:8px;background:#e8eef5;overflow:hidden}
.bar-row .bar i{display:block;height:100%;background:var(--teal);border-radius:8px}
.bar-row .bar i.mid{background:var(--gold)}.bar-row .bar i.low{background:var(--bad)}
.bar-row b{text-align:right;color:var(--navy)}
table.data{width:100%;border-collapse:collapse;font-size:14px}
table.data th,table.data td{text-align:left;padding:9px 10px;border-bottom:1px solid var(--line);vertical-align:top}
table.data th{font-size:12px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted)}
.st{display:inline-block;font-size:12px;font-weight:800;border-radius:6px;padding:2px 8px;white-space:nowrap}
.st-MET{background:#e5f5ea;color:#16683a}.st-PARTIAL{background:var(--gold-soft);color:#7a5a1f}.st-NOT_MET,.st-NOT_DONE{background:#fdecea;color:#9a2f1c}.st-NOT_PROVIDED,.st-UNANSWERED,.st-NA{background:var(--off);color:var(--muted)}
.review-box{border-left:4px solid var(--gold);background:var(--gold-soft);border-radius:0 12px 12px 0;padding:16px 18px}
.review-box p{white-space:pre-line;color:#3b3220}
.skeleton{height:14px;border-radius:6px;background:linear-gradient(90deg,#eef2f7 25%,#e2e8f0 37%,#eef2f7 63%);background-size:400% 100%;animation:sk 1.4s ease infinite;margin:10px 0}
@keyframes sk{0%{background-position:100% 50%}100%{background-position:0 50%}}
.concepts{display:grid;gap:14px}
.concept{border:1px solid var(--line);border-radius:14px;padding:18px}
.concept h3{color:var(--navy);font-size:1.1rem}
.match{float:right;font-weight:800;color:var(--teal);font-size:13px}
.toc{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:8px}
.toc div{background:var(--off);border-radius:10px;padding:12px;font-size:13px}
.toc b{display:block;color:var(--navy);font-size:12px;text-transform:uppercase;letter-spacing:.05em;margin-bottom:6px}
.toc ul{margin:0;padding-left:16px}

/* ---------- Tài khoản & đăng nhập ---------- */
.auth-wrap{background:var(--off);padding:48px 0 64px}
.auth-in{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,460px);gap:0;background:#fff;border-radius:20px;overflow:hidden;box-shadow:var(--shadow);max-width:1000px}
.auth-aside{background:linear-gradient(150deg,var(--navy-deep),var(--navy));color:#fff;padding:40px}
.auth-aside h1{color:#fff;font-size:1.9rem;margin:20px 0 22px}
.auth-card{padding:36px 38px}
.auth-tabs{display:flex;gap:4px;background:var(--off);border-radius:10px;padding:4px;margin-bottom:22px}
.auth-tabs a{flex:1;text-align:center;padding:9px;border-radius:8px;font-weight:800;color:var(--muted)}
.auth-tabs a[aria-selected=true]{background:#fff;color:var(--navy);box-shadow:0 1px 4px rgba(0,0,0,.08)}
.or{display:flex;align-items:center;gap:12px;color:var(--muted);font-size:13px;margin:18px 0}
.or:before,.or:after{content:'';flex:1;height:1px;background:var(--line)}
.account-wrap{padding:26px 28px 70px}
.acc-tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:22px;overflow-x:auto}
.acc-tabs button{border:0;background:none;padding:12px 16px;font-weight:800;color:var(--muted);border-bottom:3px solid transparent;white-space:nowrap}
.acc-tabs button.on{color:var(--navy);border-bottom-color:var(--teal)}
.stat-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-bottom:20px}
.stat{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px 18px}
.stat b{display:block;font-size:26px;color:var(--navy);line-height:1.1}.stat span{font-size:13px;color:var(--muted);font-weight:600}
.res-list{display:grid;gap:10px;list-style:none;margin:0;padding:0}
.res-item{display:flex;gap:16px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 18px;transition:border-color .15s,box-shadow .15s}
.res-item:hover{border-color:var(--teal);box-shadow:0 4px 14px rgba(0,50,113,.06)}
.res-item>a{flex:1;min-width:0;display:flex;flex-direction:column;gap:3px;color:var(--text)}
.res-item>a b{color:var(--navy);font-size:16px;overflow-wrap:anywhere}.res-item .st{align-self:flex-start;margin-top:4px}
.res-kind{font-size:11px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:var(--teal)}
.res-score{font-weight:800;color:var(--navy);font-size:22px;text-align:right;white-space:nowrap}.res-score small{font-size:12px;color:var(--muted);font-weight:600}
.acc-tabs .count{margin-left:6px;background:var(--off);border-radius:10px;padding:1px 7px;font-size:12px}
.account-wrap details.panel>summary{cursor:pointer;display:flex;flex-wrap:wrap;gap:8px;align-items:center;list-style:none}
.account-wrap details.panel>summary::-webkit-details-marker{display:none}
.account-wrap .chat-msgs{border-radius:12px}
.sec-head.row .chips{margin:0}

/* ---------- Chat, thông báo ---------- */
.chat-fab{position:fixed;right:20px;bottom:20px;z-index:80;display:inline-flex;align-items:center;gap:8px;border:0;border-radius:30px;padding:12px 18px;background:var(--teal);color:#fff;font-weight:800;box-shadow:0 10px 30px rgba(0,80,80,.35)}
.chat-fab:hover{background:#007572}
.chat-box{position:fixed;right:20px;bottom:84px;z-index:90;width:min(380px,calc(100vw - 32px));height:min(560px,calc(100vh - 120px));background:#fff;border-radius:18px;box-shadow:var(--shadow-lg);display:flex;flex-direction:column;overflow:hidden;border:1px solid var(--line)}
.chat-head{background:var(--navy);color:#fff;padding:14px 16px;display:flex;align-items:center;gap:10px}
.chat-head b{flex:1}.chat-head button{border:0;background:none;color:#fff;font-size:22px;line-height:1}
.chat-msgs{flex:1;overflow-y:auto;padding:14px;display:flex;flex-direction:column;gap:8px;background:var(--off)}
.msg{max-width:82%;padding:9px 12px;border-radius:12px;font-size:14px;line-height:1.5;white-space:pre-wrap;word-wrap:break-word}
.msg.them{background:#fff;border:1px solid var(--line);align-self:flex-start}.msg.me{background:var(--teal);color:#fff;align-self:flex-end}
.msg img{max-width:220px;border-radius:8px;display:block}
.chat-form{display:flex;gap:6px;padding:10px;border-top:1px solid var(--line)}
.chat-form textarea{min-height:42px;height:42px;resize:none}
.chat-start{padding:16px;overflow-y:auto}
.toast-area{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);z-index:100;display:grid;gap:8px}
.toast{background:var(--navy-deep);color:#fff;border-radius:10px;padding:11px 18px;font-size:14px;font-weight:600;box-shadow:var(--shadow-lg);animation:tin .2s ease}
.toast.error{background:#8a2a1a}
@keyframes tin{from{opacity:0;transform:translateY(8px)}}

/* ---------- Đáp ứng ---------- */
@media(max-width:1120px){.main-nav{margin-left:0}.nav-link{padding:9px 9px;font-size:13.5px}.mast-cta{display:none}.tool-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:960px){
  .hero-in,.split,.nl-in,.res-grid,.fw-detail,.tool-layout{grid-template-columns:minmax(0,1fr)}
  .hero-visual{display:none}.tool-side{position:static}.foot-grid{grid-template-columns:1fr 1fr}
  .story-grid,.bv-grid,.fw-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .auth-in{grid-template-columns:1fr}.auth-aside{display:none}
  .toc{grid-template-columns:1fr 1fr}
}
@media(max-width:860px){
  .nav-toggle{display:block}
  .main-nav{position:fixed;inset:110px 0 0 0;background:#fff;flex-direction:column;align-items:stretch;padding:14px 20px 40px;gap:4px;overflow-y:auto;display:none;margin:0;z-index:65;border-top:1px solid var(--line)}
  .nav-open .main-nav{display:flex}
  .nav-link{padding:14px 12px;font-size:16px;justify-content:space-between}
  .drop-panel{position:static;width:auto;box-shadow:none;border:0;padding:0 0 8px}
  .account-btn span{display:none}
}
@media(max-width:640px){
  .container{padding-left:16px;padding-right:16px}
  .topbar-links.left a:nth-child(1){display:none}.topbar-links{gap:12px}.topbar-links a{white-space:nowrap}
  .logo img{height:38px}
  .mast-in{min-height:64px;gap:10px}
  .section{padding:52px 0}
  .res-actions{width:100%}.res-actions .btn{width:100%}
  .tool-grid,.story-grid,.bv-grid,.fw-grid,.units-in,.grid-2,.choice-grid,.fw-pick,.stat-row{grid-template-columns:1fr}
  .stat-row{grid-template-columns:1fr 1fr}
  .sec-head.row{flex-direction:column;align-items:flex-start}
  .foot-grid{grid-template-columns:1fr}
  .foot-bottom{padding:18px 16px}
  .nl-row{flex-direction:column}
  .res-top{grid-template-columns:1fr;text-align:center;justify-items:center}
  .res-actions{flex-direction:row;flex-wrap:wrap;justify-content:center}
  .wz-head,.wz-body,.wz-foot{padding-left:16px;padding-right:16px}
  .wz-foot{flex-wrap:wrap}
  .tool-hero-in{flex-direction:column;gap:12px}
  .align-row{grid-template-columns:1fr}
  .card-form,.auth-card{padding:20px}
  .res-item{flex-wrap:wrap}.res-score{text-align:left}
  .chat-fab span{display:none}.chat-fab{padding:14px}
  .result-wrap,.account-wrap{padding-left:16px;padding-right:16px}
}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition:none!important;animation:none!important;scroll-behavior:auto!important}}
@media print{.site-header,.site-footer,.nl-band,.chat-fab,.res-actions,.toast-area,.bv360,.ads{display:none!important}.panel,.res-top{break-inside:avoid;border-color:#ccc}body{font-size:12pt}}
.ind-list{list-style:none;padding:0;margin:0 0 26px;display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:10px}
.ind-list li{background:var(--teal-soft);border-radius:10px;padding:12px 14px;font-weight:600;color:var(--ink);font-size:14px;line-height:1.5}