/* HTcons — landing page + công cụ ước tính quy mô
   Màu lấy từ chính website xaydunghtcons.vn: #283891 (navy) · #25AAE1 (cyan) */

:root{
  --navy:#283891; --navy-d:#1c2868; --navy-l:#3b4dab;
  --cyan:#25aae1; --cyan-d:#1789b8;
  --ink:#14192e; --body:#4a5169; --muted:#767d94;
  --line:#e3e6ef; --bg:#ffffff; --bg-soft:#f5f7fb; --bg-navy:#1c2868;
  --radius:14px; --shadow:0 4px 24px rgba(20,25,46,.08);
  --shadow-lg:0 12px 40px rgba(20,25,46,.14);
  --wrap:1140px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--body);
  font-family:"Be Vietnam Pro",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  font-size:17px;line-height:1.75;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
h1,h2,h3,h4{color:var(--ink);line-height:1.25;margin:0 0 .5em;font-weight:700;letter-spacing:-.01em}
h1{font-size:clamp(1.85rem,5vw,3.05rem);letter-spacing:-.025em}
h2{font-size:clamp(1.5rem,3.6vw,2.25rem);letter-spacing:-.02em}
h3{font-size:1.2rem}
p{margin:0 0 1.1em}
a{color:var(--navy)}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 20px}
.narrow{max-width:820px}
section{padding:72px 0}
@media(max-width:640px){section{padding:52px 0}body{font-size:16px}}
.soft{background:var(--bg-soft)}
.eyebrow{
  display:inline-block;font-size:.78rem;font-weight:700;letter-spacing:.09em;
  text-transform:uppercase;color:var(--cyan-d);margin-bottom:14px;
}
.lead{font-size:1.14rem;color:var(--body)}
.center{text-align:center}

/* ── nút ── */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:15px 30px;border-radius:var(--radius);font-weight:700;font-size:1.03rem;
  text-decoration:none;border:2px solid transparent;cursor:pointer;
  transition:transform .15s ease,box-shadow .15s ease,background .15s ease;
  font-family:inherit;line-height:1.3;
}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--cyan);color:#fff;box-shadow:0 6px 18px rgba(37,170,225,.34)}
.btn-primary:hover{background:var(--cyan-d);box-shadow:0 10px 26px rgba(37,170,225,.42)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.45)}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.btn-navy{background:var(--navy);color:#fff}
.btn-navy:hover{background:var(--navy-d)}
.btn-block{width:100%}

/* ── thanh đầu ── */
header{
  position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);
  backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line);
}
.bar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:13px 0}
.logo{font-weight:800;font-size:1.42rem;color:var(--navy);text-decoration:none;letter-spacing:-.03em}
.logo span{color:var(--cyan)}
.logo small{display:block;font-size:.63rem;font-weight:600;color:var(--muted);letter-spacing:.13em;text-transform:uppercase;margin-top:-3px}
.hot{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--navy);font-weight:700;white-space:nowrap}
.hot em{display:block;font-style:normal;font-size:.7rem;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.07em}
.hot b{font-size:1.1rem;letter-spacing:-.01em}
@media(max-width:560px){
  .hot em{display:none}
  .hot b{font-size:1.02rem}
  .logo{font-size:1.28rem}
  .logo small{display:none}      /* slogan xuống 2 dòng làm header phình trên mobile */
}

/* ── hero ── */
.hero{
  background:linear-gradient(160deg,var(--navy) 0%,var(--navy-d) 55%,#141d4d 100%);
  color:#fff;padding:76px 0 84px;position:relative;overflow:hidden;
}
.hero::after{
  content:"";position:absolute;right:-14%;top:-32%;width:640px;height:640px;border-radius:50%;
  background:radial-gradient(circle,rgba(37,170,225,.24),transparent 68%);pointer-events:none;
}
.hero .wrap{position:relative;z-index:1}
.hero h1{color:#fff;max-width:16ch}
.hero .lead{color:rgba(255,255,255,.86);font-size:1.18rem;max-width:56ch}
.hero .eyebrow{color:#7ed4f5}
.hero-cta{display:flex;flex-wrap:wrap;gap:13px;margin-top:30px}
.hero-trust{
  display:flex;flex-wrap:wrap;gap:34px;margin-top:48px;
  padding-top:30px;border-top:1px solid rgba(255,255,255,.19);
}
.hero-trust div strong{display:block;font-size:1.85rem;color:#fff;line-height:1.15;letter-spacing:-.02em}
.hero-trust div span{font-size:.87rem;color:rgba(255,255,255,.72)}

/* ── công cụ ── */
.tool{
  background:#fff;border:1px solid var(--line);border-radius:20px;
  box-shadow:var(--shadow-lg);overflow:hidden;
}
.tool-head{background:var(--navy);color:#fff;padding:24px 30px}
.tool-head h3{color:#fff;margin:0 0 4px;font-size:1.28rem}
.tool-head p{margin:0;color:rgba(255,255,255,.78);font-size:.94rem}
.tool-body{padding:30px}
@media(max-width:640px){.tool-body,.tool-head{padding:22px 18px}}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
@media(max-width:640px){.grid2{grid-template-columns:1fr}}
.field{margin-bottom:18px}
.field label{display:block;font-weight:600;color:var(--ink);margin-bottom:7px;font-size:.95rem}
.field .hint{font-weight:400;color:var(--muted);font-size:.85rem}
input[type=number],input[type=text],input[type=tel],select{
  width:100%;padding:13px 15px;border:1.5px solid var(--line);border-radius:11px;
  font-size:1.02rem;font-family:inherit;color:var(--ink);background:#fff;transition:border-color .15s,box-shadow .15s;
}
input:focus,select:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(37,170,225,.16)}
.chips{display:flex;flex-wrap:wrap;gap:9px}
.chip{
  padding:9px 17px;border:1.5px solid var(--line);border-radius:999px;background:#fff;
  cursor:pointer;font-size:.94rem;font-weight:600;color:var(--body);font-family:inherit;transition:all .15s;
}
.chip:hover{border-color:var(--cyan)}
.chip[aria-pressed="true"]{background:var(--navy);border-color:var(--navy);color:#fff}

/* ── kết quả ── */
.result{margin-top:26px;padding-top:26px;border-top:2px dashed var(--line);display:none}
.result.on{display:block;animation:fade .35s ease}
@keyframes fade{from{opacity:0;transform:translateY(9px)}to{opacity:1;transform:none}}
.figure{
  background:linear-gradient(135deg,var(--bg-soft),#eaf6fd);border:1px solid #d3e9f6;
  border-radius:var(--radius);padding:24px;text-align:center;margin-bottom:20px;
}
.figure em{display:block;font-style:normal;font-size:.87rem;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.07em}
.figure strong{display:block;font-size:2.6rem;color:var(--navy);line-height:1.15;margin:6px 0 2px;letter-spacing:-.03em}
/* CHỈ con trực tiếp — nếu để `.figure span` thì nó bắt luôn #tongSan nằm trong <strong> và ép về .95rem */
.figure > span{font-size:.95rem;color:var(--body)}
.breakdown{list-style:none;padding:0;margin:0 0 20px;font-size:.95rem}
.breakdown li{display:flex;justify-content:space-between;gap:14px;padding:10px 2px;border-bottom:1px solid var(--line)}
.breakdown li:last-child{border-bottom:none;font-weight:700;color:var(--ink)}
.breakdown li span:last-child{white-space:nowrap;font-variant-numeric:tabular-nums}
.tags{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px}
.tag{background:#eaf6fd;color:var(--navy);border-radius:999px;padding:6px 14px;font-size:.87rem;font-weight:600}
.note{
  background:#fffaf0;border-left:3px solid #e8a33d;border-radius:0 10px 10px 0;
  padding:14px 16px;font-size:.9rem;color:#7a5a1e;margin:0 0 22px;
}
.note b{color:#5c430f}

/* ── thẻ ── */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(255px,1fr));gap:22px;margin-top:38px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:transform .18s,box-shadow .18s}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.card h3{margin-bottom:8px}
.card p{margin:0;font-size:.97rem}
.card .num{
  width:42px;height:42px;border-radius:11px;background:#eaf6fd;color:var(--navy);
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:1.1rem;margin-bottom:15px;
}
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;margin-top:38px}
.step{position:relative;padding:24px 22px 22px;background:#fff;border:1px solid var(--line);border-radius:var(--radius)}
.step::before{
  counter-increment:s;content:counter(s);position:absolute;top:-15px;left:22px;
  width:34px;height:34px;border-radius:50%;background:var(--cyan);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:.95rem;
  box-shadow:0 3px 10px rgba(37,170,225,.4);
}
.step h3{font-size:1.05rem;margin:8px 0 5px}
.step p{margin:0;font-size:.93rem;color:var(--muted)}
.quotes{display:grid;grid-template-columns:repeat(auto-fit,minmax(285px,1fr));gap:20px;margin-top:34px}
.quote{background:#fff;border:1px solid var(--line);border-left:3px solid var(--cyan);border-radius:0 var(--radius) var(--radius) 0;padding:22px 24px}
.quote p{font-style:italic;color:var(--ink);margin:0 0 12px;font-size:1.02rem}
.quote span{font-size:.87rem;color:var(--muted)}

/* ── liên hệ ── */
.contact{background:var(--bg-navy);color:#fff}
.contact h2{color:#fff}
.contact .lead{color:rgba(255,255,255,.82)}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start}
@media(max-width:820px){.contact-grid{grid-template-columns:1fr;gap:32px}}
.contact-form{background:#fff;border-radius:18px;padding:28px;box-shadow:var(--shadow-lg)}
.contact-form h3{margin-bottom:6px}
.contact-form .sub{font-size:.93rem;color:var(--muted);margin-bottom:20px}
.ways{list-style:none;padding:0;margin:26px 0 0}
.ways li{display:flex;gap:14px;align-items:flex-start;margin-bottom:18px}
.ways .ico{width:40px;height:40px;flex:0 0 40px;border-radius:11px;background:rgba(255,255,255,.11);display:flex;align-items:center;justify-content:center;font-size:1.2rem}
.ways em{display:block;font-style:normal;font-size:.8rem;color:rgba(255,255,255,.6);text-transform:uppercase;letter-spacing:.07em}
.ways a,.ways b{color:#fff;text-decoration:none;font-weight:700;font-size:1.05rem}
.ok{display:none;background:#eafaf1;border:1px solid #b7e8cd;color:#1a6b42;border-radius:12px;padding:18px;font-size:.96rem}
.ok.on{display:block}
.ok-cta{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.ok-cta .btn{flex:1;min-width:170px;padding:12px 16px;font-size:.96rem}
.err{color:#c0392b;font-size:.88rem;margin-top:6px;display:none}
.err.on{display:block}
footer{background:#131a3d;color:rgba(255,255,255,.62);padding:34px 0;font-size:.89rem}
.foot{display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;align-items:center}
footer a{color:rgba(255,255,255,.85)}
.sticky-cta{
  position:fixed;left:0;right:0;bottom:0;z-index:60;display:none;gap:10px;padding:10px 14px;
  background:rgba(255,255,255,.97);border-top:1px solid var(--line);box-shadow:0 -4px 20px rgba(0,0,0,.09);
}
.sticky-cta .btn{flex:1;padding:13px 10px;font-size:.97rem}
@media(max-width:640px){
  .sticky-cta{display:flex}
  body{padding-bottom:70px}
}
/* Ghi chú 2026-09-10: từng phải chừa 56px dưới thanh nút vì huy hiệu "Powered by Netlify"
   nổi ở góc dưới bên phải và đè lên nút. Đã tắt hẳn huy hiệu trong
   Netlify → Project configuration → General → Powered by Netlify badge (miễn phí),
   nên khoảng chừa đó không cần nữa. Đổi hosting mà huy hiệu quay lại thì thêm
   `padding-bottom:56px` cho `.sticky-cta` trong khối trên. */