/* Gốc Rễ — hệ màu Tự Vững 60/30/10: nền kem, xanh navy, đỏ triện. Mobile-first.
   Dùng chung ngôn ngữ thị giác với /la-ban-insight. */
:root{
  --kem:#F8F7F2; --kem2:#fffdf7; --navy:#1E3A5F; --troi:#87BFEF; --do:#9B1C1C;
  --muc:#5b6472; --line:#e7e3d8; --xanh-ok:#1f5a2e; --am:#8a6d3b;
  --serif:"Cormorant Garamond",Georgia,"Times New Roman",serif;
}
*{box-sizing:border-box}
body{margin:0;background:var(--kem);color:#20262e;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;font-size:16px;line-height:1.55;padding-bottom:64px}
.top{background:linear-gradient(180deg,#fffdf7,#f4f1ea);border-bottom:1px solid var(--line);padding:16px 18px 12px}
.brand{font-family:var(--serif);font-size:22px;font-weight:700;color:var(--navy);display:flex;align-items:center;gap:8px}
.trien{background:var(--do);color:#fff;width:26px;height:26px;border-radius:6px;display:inline-flex;align-items:center;justify-content:center;font-size:15px}
.top .sub{color:var(--muc);font-size:13.5px;margin-top:4px}

.rail{display:flex;gap:6px;overflow-x:auto;padding:10px 14px;background:var(--kem);position:sticky;top:0;z-index:5;border-bottom:1px solid var(--line)}
.rail button{flex:0 0 auto;border:1px solid var(--line);background:#fff;color:var(--muc);border-radius:999px;padding:12px 16px;min-height:44px;font-size:12.5px;font-weight:600;white-space:nowrap;cursor:pointer}
.rail button.on{background:var(--navy);color:#fff;border-color:var(--navy)}
.rail button.done{border-color:var(--xanh-ok);color:var(--xanh-ok)}

main{max-width:720px;margin:0 auto;padding:16px 16px 24px}
h2{font-family:var(--serif);color:var(--navy);font-size:21px;margin:6px 0 4px}
.lead{color:var(--muc);font-size:14px;margin:0 0 14px}
.card{background:var(--kem2);border:1px solid var(--line);border-radius:12px;padding:16px;margin-bottom:14px}
.card h3{margin:0 0 8px;font-size:15px;color:var(--navy)}
label{display:block;font-weight:600;font-size:13.5px;margin:10px 0 5px}
input[type=text],input[type=number],textarea{width:100%;border:1px solid var(--line);border-radius:10px;padding:11px;font-size:15px;font-family:inherit;background:#fff}
textarea{resize:vertical;line-height:1.5}
.hint{color:var(--muc);font-size:12.5px;margin:5px 0 0}
.eg{background:#f4f7fb;border:1px solid #dbe6f2;border-radius:8px;padding:8px 11px;font-size:12.5px;color:#33536f;margin:6px 0 0}
.eg b{color:var(--navy)}

.btn{appearance:none;border:0;border-radius:10px;padding:12px 16px;font-size:15px;font-weight:700;cursor:pointer}
.btn.go{background:var(--navy);color:#fff}
.btn.gold{background:var(--do);color:#fff}
.btn.ghost{background:#fff;border:1px solid var(--line);color:var(--navy)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.row{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}

.warn{background:#fbf3e6;border:1px solid #ecd9b0;border-left:3px solid var(--am);border-radius:10px;padding:12px 14px;color:#6b5321;font-size:14px}
.warn b{color:var(--do)}
.ok-box{background:#eef7ee;border:1px solid #cfe6cf;border-left:3px solid var(--xanh-ok);border-radius:10px;padding:12px 14px;font-size:14px}

/* Câu triết lý: LÕI (đỏ, bất biến) vs VỎ (xanh, tinh chỉnh) */
.cau{border:1px solid var(--line);border-radius:12px;padding:14px;margin-bottom:12px;background:#fff}
.cau.loi{border-left:4px solid var(--do)}
.cau.vo{border-left:4px solid var(--troi)}
.cau .no{display:flex;align-items:center;gap:8px;margin-bottom:2px}
.cau .no b{color:var(--navy);font-size:15px}
.tag-loi{background:#fdeaea;color:var(--do);border:1px solid #f2c9c9;border-radius:6px;padding:1px 7px;font-size:10.5px;font-weight:700}
.tag-vo{background:#eef4fb;color:var(--navy);border:1px solid #d7e6f7;border-radius:6px;padding:1px 7px;font-size:10.5px;font-weight:700}
.cau .prompt{font-size:13.5px;color:var(--muc);margin:2px 0 8px}
.nguyen-tac{background:#f6f9f4;border:1px solid #cfe6cf;border-radius:8px;padding:10px;margin-top:8px;font-size:14px}
.nguyen-tac b{color:var(--xanh-ok)}
.tt-warn{background:#fdeaea;border:1px solid #f2c9c9;border-left:3px solid var(--do);border-radius:8px;padding:10px;margin-top:8px;font-size:13.5px;color:#7a1d1d}
.chip{display:inline-block;background:#fdeaea;color:var(--do);border-radius:6px;padding:1px 7px;font-size:11.5px;font-weight:700;margin:3px 4px 0}

/* 4 phép thử */
.thu{display:flex;gap:10px;align-items:flex-start;border:1px solid var(--line);border-radius:10px;padding:11px;margin-bottom:8px;background:#fff}
.thu .ic{font-size:18px}
.thu .body{flex:1}
.thu .t{font-weight:700;color:var(--navy);font-size:14px}
.thu .d{font-size:12.5px;color:var(--muc);margin-top:2px}
.thu input[type=number]{width:120px;margin-top:6px}
.thu.pass{border-color:#cfe6cf;background:#f6faf4}
.thu.fail{border-color:#f2c9c9;background:#fdf2f2}

/* Bản tuyên ngôn / thẻ lõi — dùng cho in PDF */
.dna{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px;white-space:pre-wrap;font-size:15px;line-height:1.7}
.the{background:linear-gradient(180deg,#fffdf7,#f7f3ea);border:1px solid var(--line);border-left:4px solid var(--do);border-radius:12px;padding:16px;margin:10px 0}
.the .h{font-family:var(--serif);color:var(--do);font-size:13px;letter-spacing:.5px;margin-bottom:8px}
.the ol{margin:0;padding-left:20px}
.the li{font-size:15px;margin:6px 0;color:#20262e}
.giong{background:#eef4fb;border:1px solid #d7e6f7;border-radius:10px;padding:12px;margin-top:10px;font-size:14px}
.giong i{display:block;color:#33536f;margin:5px 0}

/* Sổ giữ lời hứa */
.so-item{display:flex;gap:10px;align-items:flex-start;border-bottom:1px dashed var(--line);padding:9px 0;font-size:14px}
.so-item .dot{font-size:16px}
.so-item .meta{color:var(--muc);font-size:12px}
.so-empty{color:var(--am);font-style:italic;font-size:14px}
.bar{display:flex;align-items:flex-end;gap:5px;height:64px;margin:12px 0 4px}
.bar .col{flex:1;background:var(--navy);border-radius:4px 4px 0 0;min-height:3px}
.bar-lbl{display:flex;gap:5px}
.bar-lbl span{flex:1;text-align:center;font-size:10.5px;color:var(--muc)}
.dem{display:flex;gap:12px;margin:6px 0 10px}
.dem .n{font-family:var(--serif);font-size:26px;color:var(--navy);font-weight:700}
.dem .u{font-size:12px;color:var(--muc)}

.foot{position:fixed;bottom:0;left:0;right:0;background:#fffdf7;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:8px 16px;font-size:12px;color:var(--muc)}
.ai-dot::before{content:"● ";color:#bbb}
.ai-dot.on::before{color:var(--xanh-ok)}
.toast{position:fixed;left:50%;bottom:74px;transform:translateX(-50%) translateY(20px);background:var(--navy);color:#fff;padding:10px 16px;border-radius:10px;font-size:14px;opacity:0;pointer-events:none;transition:.25s;z-index:20}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

@media print{
  .top,.rail,.foot,.row,.no-print{display:none!important}
  body{padding:0;background:#fff}
  main{max-width:100%}
  .dna,.the{border:1px solid #ccc}
}

/* §10 V5.2 — vùng chạm trên điện thoại phải ≥44px. Nới các ĐƯỜNG DẪN ĐIỀU HƯỚNG
   (breadcrumb, chân trang, thẻ liên kết, logo) và ô nhập; KHÔNG đụng link nằm giữa câu văn. */
@media (max-width: 1023px) {
  .crumb a, .foot a, .foot-links a, .links a, .top a, .byline a, .tag, .di, .brand, .tv-brand {
    display: inline-flex; align-items: center; min-height: 44px;
  }
  input:not([type="checkbox"]):not([type="radio"]), select, textarea { min-height: 44px; }
}