/* =========================================================
   qvco.vn — Design tokens
   Concept: "Tech pack" — tài liệu spec sản xuất của chính ngành may:
   góc canh dấu cắt (registration marks), đường may đứt nét,
   nhãn vải (woven label) làm badge/CTA, mã SKU làm nhãn mục.
   ========================================================= */

:root{
  --ink:        #1B2A38; /* xanh denim đậm — nền tối, header */
  --paper:      #EDE7D8; /* màu vải canvas thô — nền sáng */
  --paper-2:    #E3DBC6; /* canvas đậm hơn 1 nấc, dùng cho card */
  --text:       #22201B; /* mực đen ấm */
  --text-soft:  #55503F;
  --rust:       #A63D2F; /* chỉ đỏ gạch — accent chính */
  --tape:       #C99A2E; /* vàng thước dây — accent phụ */
  --stitch:     #8B8577; /* xám chỉ may — viền / đường đứt nét */
  --line:       rgba(27,42,56,0.14);

  --f-display: 'Oswald', 'Arial Narrow', sans-serif;
  --f-body:    'Lora', Georgia, serif;
  --f-mono:    'IBM Plex Mono', 'Courier New', monospace;

  --container: 1180px;
  --radius: 2px;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:var(--f-body);
  font-size:17px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img{ max-width:100%; display:block; }
a{ color:inherit; }
.wrap{ max-width:var(--container); margin:0 auto; padding:0 28px; }

h1,h2,h3,h4{
  font-family:var(--f-display);
  font-weight:600;
  text-transform:uppercase;
  letter-spacing:0.02em;
  margin:0 0 .5em;
  color:var(--ink);
}
h1{ font-size:clamp(2.4rem,5vw,4.2rem); line-height:1.02; letter-spacing:0.01em; }
h2{ font-size:clamp(1.7rem,3vw,2.4rem); }
h3{ font-size:1.15rem; letter-spacing:0.03em; }
p{ margin:0 0 1em; color:var(--text-soft); }
p.lede{ font-size:1.15rem; color:var(--text); max-width:62ch; }

/* ---------- eyebrow / mã hiệu kiểu SKU ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:.5em;
  font-family:var(--f-mono);
  font-size:.78rem;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--rust);
  margin-bottom:.9em;
}
.eyebrow::before{
  content:"";
  width:22px; height:1px;
  background:var(--rust);
}

/* ---------- registration marks (góc dấu cắt vải) ---------- */
.reg-marks{ position:relative; }
.reg-marks::before,
.reg-marks::after{
  content:"";
  position:absolute;
  width:16px; height:16px;
  border:1px solid var(--ink);
  opacity:.55;
}
.reg-marks::before{ top:-1px; left:-1px; border-right:none; border-bottom:none; }
.reg-marks::after{ bottom:-1px; right:-1px; border-left:none; border-top:none; }

/* ---------- dashed seam divider (đường may đứt nét) ---------- */
.seam{
  border:none;
  border-top:1.5px dashed var(--stitch);
  margin:0;
  position:relative;
}
.seam::before{
  content:"✂";
  position:absolute;
  left:28px; top:-11px;
  background:var(--paper);
  color:var(--stitch);
  font-size:.85rem;
  padding:0 6px;
}

/* ---------- header ---------- */
header.site{
  position:sticky; top:0; z-index:50;
  background:var(--ink);
  color:var(--paper);
  border-bottom:3px solid var(--rust);
}
.nav{
  display:flex; align-items:center; justify-content:space-between;
  padding:16px 28px;
}
.brand{
  font-family:var(--f-display);
  font-size:1.35rem;
  letter-spacing:.06em;
  color:var(--paper);
  text-decoration:none;
  display:flex; align-items:baseline; gap:8px;
}
.brand small{
  font-family:var(--f-mono);
  font-size:.62rem;
  color:var(--tape);
  letter-spacing:.1em;
}
.nav-links{
  display:flex; gap:30px; list-style:none; margin:0; padding:0;
  font-family:var(--f-mono); font-size:.82rem; letter-spacing:.05em; text-transform:uppercase;
}
.nav-links a{
  text-decoration:none; color:var(--paper); opacity:.8;
  padding-bottom:4px; border-bottom:2px solid transparent;
  transition:opacity .2s, border-color .2s;
}
.nav-links a:hover, .nav-links a.active{ opacity:1; border-color:var(--tape); }
.nav-cta{
  font-family:var(--f-mono); font-size:.78rem; text-transform:uppercase; letter-spacing:.08em;
  background:var(--rust); color:var(--paper); text-decoration:none;
  padding:10px 18px; border-radius:var(--radius);
}
.burger{ display:none; background:none; border:none; color:var(--paper); font-size:1.6rem; cursor:pointer; }

/* ---------- hero ---------- */
.hero{
  background:var(--ink); color:var(--paper);
  padding:90px 0 70px;
  position:relative;
  overflow:hidden;
}
.hero .wrap{ position:relative; z-index:2; }
.hero-grid{
  display:grid; grid-template-columns:1.3fr 1fr; gap:50px; align-items:end;
}
.hero h1{ color:var(--paper); }
.hero h1 em{ font-style:normal; color:var(--tape); }
.hero p.lede{ color:#D9D3C3; }
.tape-measure{
  position:absolute; left:0; right:0; top:0; height:26px;
  background:repeating-linear-gradient(90deg, var(--tape) 0 2px, transparent 2px 40px);
  opacity:.35;
}
.stat-row{
  display:grid; grid-template-columns:repeat(4,1fr); gap:1px;
  background:rgba(237,231,216,.18);
  margin-top:56px;
  border-top:1px solid rgba(237,231,216,.25);
}
.stat{ background:var(--ink); padding:20px 18px; }
.stat .n{ font-family:var(--f-display); font-size:2.1rem; color:var(--tape); line-height:1; }
.stat .l{ font-family:var(--f-mono); font-size:.72rem; color:#C9C3B2; letter-spacing:.05em; margin-top:6px; }

/* ---------- woven label tag (signature component) ---------- */
.tag{
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--f-mono); font-size:.75rem; letter-spacing:.06em; text-transform:uppercase;
  border:1.5px dashed var(--stitch);
  border-radius:14px;
  padding:6px 14px;
  color:var(--text);
  background:var(--paper);
}
.tag.rust{ border-color:var(--rust); color:var(--rust); }
.tag.tape{ border-color:var(--tape); color:#8a6a1f; }

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; gap:10px;
  font-family:var(--f-mono); font-size:.85rem; text-transform:uppercase; letter-spacing:.06em;
  text-decoration:none;
  padding:14px 26px;
  border-radius:var(--radius);
  border:1.5px solid var(--ink);
  color:var(--ink);
  transition:transform .15s ease, background .2s ease, color .2s ease;
}
.btn:hover{ transform:translateY(-2px); }
.btn.primary{ background:var(--rust); border-color:var(--rust); color:var(--paper); }
.btn.on-dark{ border-color:var(--paper); color:var(--paper); }
.btn.on-dark:hover{ background:var(--paper); color:var(--ink); }

/* ---------- sections ---------- */
section{ padding:78px 0; }
section.alt{ background:var(--paper-2); }
.section-head{ max-width:640px; margin-bottom:46px; }

/* ---------- card grids ---------- */
.grid-2{ display:grid; grid-template-columns:1fr 1fr; gap:26px; }
.grid-3{ display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.grid-4{ display:grid; grid-template-columns:repeat(4,1fr); gap:20px; }
.grid-5{ display:grid; grid-template-columns:repeat(5,1fr); gap:18px; }

.card{
  background:var(--paper);
  border:1px solid var(--line);
  padding:30px 26px;
  position:relative;
}
.card .idx{
  font-family:var(--f-mono); font-size:.75rem; color:var(--rust); letter-spacing:.05em;
  display:block; margin-bottom:14px;
}
.card h3{ margin-bottom:.4em; }
.card p{ font-size:.96rem; margin-bottom:0; }
.card ul{ margin:10px 0 0; padding-left:18px; color:var(--text-soft); font-size:.94rem; }
.card ul li{ margin-bottom:4px; }

.swatch{
  width:100%; height:6px; margin-bottom:18px;
}

/* ---------- process steps ---------- */
.process{
  display:grid; grid-template-columns:repeat(5,1fr); gap:0;
  border-top:1px dashed var(--stitch); border-bottom:1px dashed var(--stitch);
}
.process .step{
  padding:26px 20px; border-right:1px dashed var(--stitch);
}
.process .step:last-child{ border-right:none; }
.process .step .num{
  font-family:var(--f-display); font-size:2rem; color:var(--tape); line-height:1; margin-bottom:10px;
}
.process .step h4{ font-size:.95rem; margin-bottom:6px; }
.process .step p{ font-size:.85rem; margin:0; }

/* ---------- price table ---------- */
table.spec{
  width:100%; border-collapse:collapse; font-size:.95rem;
}
table.spec caption{
  text-align:left; font-family:var(--f-mono); font-size:.75rem; color:var(--text-soft);
  letter-spacing:.05em; text-transform:uppercase; margin-bottom:10px;
}
table.spec th, table.spec td{
  padding:14px 16px; border-bottom:1px solid var(--line); text-align:left;
}
table.spec th{
  font-family:var(--f-mono); font-size:.72rem; text-transform:uppercase; letter-spacing:.06em;
  color:var(--paper); background:var(--ink);
}
table.spec td.price{ font-family:var(--f-mono); color:var(--rust); }
table.spec tr:hover td{ background:rgba(166,61,47,.05); }

/* ---------- branch cards ---------- */
.branch{
  border:1px solid var(--line); background:var(--paper);
  padding:26px;
}
.branch .coord{
  font-family:var(--f-mono); font-size:.72rem; color:var(--text-soft); letter-spacing:.04em;
}

/* ---------- CTA band ---------- */
.cta-band{
  background:var(--ink); color:var(--paper);
  padding:64px 0; text-align:center;
}
.cta-band h2{ color:var(--paper); }
.cta-band p{ color:#D9D3C3; max-width:56ch; margin:0 auto 30px; }

/* ---------- form ---------- */
form.inquiry{ display:grid; gap:18px; max-width:640px; }
form.inquiry .row2{ display:grid; grid-template-columns:1fr 1fr; gap:18px; }
label{
  font-family:var(--f-mono); font-size:.72rem; text-transform:uppercase; letter-spacing:.06em;
  color:var(--text-soft); display:block; margin-bottom:6px;
}
input, select, textarea{
  width:100%; font-family:var(--f-body); font-size:1rem;
  padding:12px 14px; border:1px solid var(--stitch); background:var(--paper);
  color:var(--text); border-radius:var(--radius);
}
input:focus, select:focus, textarea:focus{
  outline:2px solid var(--rust); outline-offset:1px;
}
textarea{ resize:vertical; min-height:120px; }
.form-note{ font-size:.85rem; color:var(--text-soft); }

/* ---------- footer ---------- */
footer.site{
  background:var(--ink); color:#B9B3A0;
  padding:54px 0 30px;
  font-size:.9rem;
}
footer .wrap{ display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:36px; }
footer h4{ color:var(--paper); font-size:.85rem; letter-spacing:.06em; }
footer a{ text-decoration:none; color:#B9B3A0; }
footer a:hover{ color:var(--tape); }
footer ul{ list-style:none; padding:0; margin:0; display:grid; gap:8px; }
.foot-bottom{
  margin-top:40px; padding-top:20px; border-top:1px solid rgba(237,231,216,.15);
  font-family:var(--f-mono); font-size:.72rem; display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px;
}

/* ---------- utility ---------- */
.center{ text-align:center; }
.mt-lg{ margin-top:60px; }
@media (prefers-reduced-motion: reduce){ *{ scroll-behavior:auto !important; transition:none !important; } }

/* ---------- responsive ---------- */
@media (max-width:960px){
  .hero-grid{ grid-template-columns:1fr; }
  .stat-row{ grid-template-columns:repeat(2,1fr); }
  .grid-3, .grid-4, .grid-5, .grid-2{ grid-template-columns:1fr 1fr; }
  .process{ grid-template-columns:1fr 1fr; }
  .process .step{ border-bottom:1px dashed var(--stitch); }
  footer .wrap{ grid-template-columns:1fr 1fr; }
}
@media (max-width:680px){
  .nav-links, .nav-cta{ display:none; }
  .burger{ display:block; }
  .nav-links.open{
    display:flex; flex-direction:column; position:absolute; top:64px; left:0; right:0;
    background:var(--ink); padding:20px 28px; gap:18px; border-bottom:3px solid var(--rust);
  }
  .grid-3, .grid-4, .grid-5, .grid-2{ grid-template-columns:1fr; }
  .process{ grid-template-columns:1fr; }
  form.inquiry .row2{ grid-template-columns:1fr; }
  footer .wrap{ grid-template-columns:1fr; }
  .stat-row{ grid-template-columns:1fr 1fr; }
}