/* =========================================================
   Công Ty TNHH Rập Phom Mica — Design tokens
   Concept: self-healing cutting mat (grid) + amber mica sheet
   + garment pattern-making marks (grainline, notch, drill hole)
   ========================================================= */
:root{
  --mat-green-deep:#25332b;
  --mat-green:#33453b;
  --mat-green-light:#455b4f;
  --grid-line: rgba(226,150,63,0.10);
  --grid-line-strong: rgba(226,150,63,0.22);

  --mica-amber:#e2963f;
  --mica-amber-deep:#c97a2b;
  --mica-amber-pale:#f3c98a;

  --paper:#e4e1d5;
  --paper-2:#ede9dc;
  --ink:#20261f;
  --ink-soft:#4c5449;
  --steel:#7e97a6;

  --font-display:"Big Shoulders Display", sans-serif;
  --font-body:"IBM Plex Sans", sans-serif;
  --font-mono:"IBM Plex Mono", monospace;

  --radius:6px;
  --wrap:1160px;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img,svg{ display:block; max-width:100%; }
a{ color:inherit; text-decoration:none; }
ul,ol{ margin:0; padding:0; list-style:none; }
h1,h2,h3{ margin:0; font-family:var(--font-display); font-weight:800; letter-spacing:0.01em; }
p{ margin:0; }

.wrap{
  max-width:var(--wrap);
  margin:0 auto;
  padding:0 24px;
}

/* focus visibility */
a:focus-visible,button:focus-visible{
  outline:2px solid var(--mica-amber);
  outline-offset:3px;
}

@media (prefers-reduced-motion: reduce){
  *{ animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important; scroll-behavior:auto !important; }
}

/* ---------- eyebrow / section head ---------- */
.eyebrow{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--mica-amber-deep);
  margin:0 0 10px;
}
.section-head{ max-width:640px; margin-bottom:44px; }
.section-head h2{ font-size:clamp(26px,3.4vw,38px); line-height:1.15; }

.section{ padding:88px 0; }

/* ================= HEADER ================= */
.site-header{
  position:sticky; top:0; z-index:50;
  background:var(--mat-green-deep);
  border-bottom:1px solid rgba(226,150,63,0.18);
}
.header-inner{
  display:flex; align-items:center; gap:20px;
  height:72px;
  color:var(--paper-2);
}
.brand{ display:flex; align-items:center; gap:10px; margin-right:auto; color:var(--mica-amber); }
.brand-mark{ color:var(--mica-amber); flex:none; }
.brand-text{ display:flex; flex-direction:column; line-height:1.1; }
.brand-name{ font-family:var(--font-display); font-weight:800; font-size:18px; letter-spacing:0.03em; color:var(--paper-2); }
.brand-name.small{ font-size:16px; }
.brand-sub{ font-family:var(--font-mono); font-size:10.5px; letter-spacing:0.08em; color:var(--steel); text-transform:uppercase; }

.main-nav{ display:flex; gap:26px; }
.main-nav a{
  font-size:14.5px; font-weight:500; color:var(--paper-2); opacity:0.82;
  position:relative; padding:4px 0;
}
.main-nav a:hover{ opacity:1; color:var(--mica-amber-pale); }

.hotline-pill{
  display:flex; align-items:center; gap:8px;
  font-family:var(--font-mono); font-weight:600; font-size:14px;
  color:var(--mat-green-deep);
  background:var(--mica-amber);
  padding:9px 16px;
  border-radius:999px;
  white-space:nowrap;
  transition:background .15s ease, transform .15s ease;
}
.hotline-pill:hover{ background:var(--mica-amber-pale); transform:translateY(-1px); }

.zalo-pill{
  display:flex; align-items:center;
  font-family:var(--font-mono); font-weight:600; font-size:13.5px;
  color:var(--mica-amber-pale);
  border:1.5px solid rgba(226,150,63,0.5);
  padding:8px 14px;
  border-radius:999px;
  white-space:nowrap;
  transition:border-color .15s ease, color .15s ease, transform .15s ease;
}
.zalo-pill:hover{ border-color:var(--mica-amber); color:var(--mica-amber); transform:translateY(-1px); }

.nav-toggle{
  display:none; flex-direction:column; justify-content:center; gap:5px;
  width:36px; height:36px; background:none; border:0; cursor:pointer; padding:0;
}
.nav-toggle span{ display:block; height:2px; background:var(--paper-2); border-radius:2px; }

/* ================= HERO ================= */
.hero{
  position:relative;
  background:var(--mat-green);
  color:var(--paper-2);
  overflow:hidden;
  padding:76px 0 96px;
}
.hero-grid{
  position:absolute; inset:0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size:36px 36px;
  mask-image:radial-gradient(ellipse at 30% 30%, black 40%, transparent 85%);
}
.hero-inner{
  position:relative;
  display:grid;
  grid-template-columns:1.05fr 0.95fr;
  gap:40px;
  align-items:center;
}
.hero-title{
  font-size:clamp(38px,5.6vw,60px);
  line-height:1.02;
  color:var(--paper-2);
  margin:0 0 20px;
}
.hero-desc{
  max-width:520px;
  color:var(--paper-2);
  opacity:0.86;
  font-size:16.5px;
  margin-bottom:30px;
}
.hero-desc strong{ color:var(--mica-amber-pale); font-weight:600; }

.hero-actions{ display:flex; gap:14px; flex-wrap:wrap; margin-bottom:16px; }
.btn{
  display:inline-flex; align-items:center; gap:9px;
  font-weight:600; font-size:15px;
  padding:13px 22px;
  border-radius:4px;
  border:1.5px solid transparent;
  transition:transform .15s ease, background .15s ease, border-color .15s ease;
}
.btn-primary{ background:var(--mica-amber); color:var(--mat-green-deep); }
.btn-primary:hover{ background:var(--mica-amber-pale); transform:translateY(-2px); }
.btn-ghost{ border-color:rgba(237,233,220,0.35); color:var(--paper-2); }
.btn-ghost:hover{ border-color:var(--mica-amber); color:var(--mica-amber-pale); }

.hero-note{ font-family:var(--font-mono); font-size:12.5px; color:var(--steel); }

.hero-visual{ position:relative; }
.pattern-svg{ width:100%; height:auto; overflow:visible; }
.piece-outline{
  fill:rgba(226,150,63,0.10);
  stroke:var(--mica-amber);
  stroke-width:2.5;
  stroke-linejoin:round;
  stroke-dasharray:1400;
  stroke-dashoffset:1400;
  animation:trace 2.6s ease forwards 0.3s;
}
.piece-seam{
  fill:none;
  stroke:var(--mica-amber-pale);
  stroke-width:1;
  stroke-dasharray:4 6;
  opacity:0.5;
}
.grainline{ stroke:var(--paper-2); stroke-width:1.4; opacity:0.7; }
.grainline-arrow{ fill:var(--paper-2); opacity:0.7; }
.notch{ fill:var(--mat-green-deep); stroke:var(--mica-amber); stroke-width:1.5; stroke-linejoin:round; }
.drillhole{ fill:var(--mat-green-deep); stroke:var(--mica-amber-pale); stroke-width:1.2; }
.piece-label{ font-family:var(--font-mono); font-size:15px; fill:var(--paper-2); opacity:0.55; letter-spacing:0.08em; }
.piece-label-sub{ font-family:var(--font-mono); font-size:11px; fill:var(--mica-amber-pale); opacity:0.7; letter-spacing:0.1em; }

@keyframes trace{ to{ stroke-dashoffset:0; } }

/* ================= ABOUT ================= */
.about{ background:var(--paper); }
.about-grid{
  display:grid;
  grid-template-columns:1.3fr 1fr;
  gap:48px;
  align-items:start;
}
.about-text{ font-size:16.5px; color:var(--ink-soft); max-width:560px; }
.about-text strong{ color:var(--ink); }
.about-stats{ display:flex; flex-direction:column; gap:20px; }
.about-stats li{
  display:flex; align-items:baseline; gap:14px;
  border-left:3px solid var(--mica-amber);
  padding:4px 0 4px 16px;
}
.stat-num{ font-family:var(--font-mono); font-weight:600; font-size:15px; color:var(--mica-amber-deep); white-space:nowrap; }
.stat-label{ font-size:14.5px; color:var(--ink-soft); }

/* ================= PRODUCTS ================= */
.products{ background:var(--paper-2); }
.product-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.product-card{
  position:relative;
  background:var(--paper);
  border:1px solid rgba(32,38,31,0.10);
  border-radius:var(--radius);
  padding:30px 26px 28px;
  transition:transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.product-card:hover{
  transform:translateY(-4px);
  box-shadow:0 14px 30px rgba(32,38,31,0.12);
  border-color:var(--mica-amber);
}
.card-notch{
  position:absolute; top:-1px; left:26px;
  width:14px; height:10px;
  background:var(--paper);
  border:1px solid rgba(32,38,31,0.10);
  border-top:none;
  clip-path:polygon(0 0,100% 0,50% 100%);
}
.card-icon{
  width:56px; height:56px;
  display:flex; align-items:center; justify-content:center;
  border-radius:50%;
  background:rgba(226,150,63,0.14);
  color:var(--mica-amber-deep);
  margin-bottom:18px;
}
.card-media{
  width:100%; height:160px;
  border-radius:4px;
  overflow:hidden;
  margin-bottom:18px;
  background:var(--paper-2);
}
.card-media img{
  width:100%; height:100%;
  object-fit:cover;
  display:block;
}
.product-card h3{ font-size:21px; margin-bottom:10px; color:var(--ink); }
.product-card p{ color:var(--ink-soft); font-size:14.5px; margin-bottom:16px; }
.spec-list{ display:flex; flex-direction:column; gap:8px; }
.spec-list li{
  font-size:13.5px; color:var(--ink-soft);
  padding-left:16px; position:relative;
}
.spec-list li::before{
  content:""; position:absolute; left:0; top:7px;
  width:6px; height:6px; background:var(--mica-amber);
  transform:rotate(45deg);
}
.products-note{
  margin-top:32px;
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--ink-soft);
  border-top:1px dashed rgba(32,38,31,0.2);
  padding-top:20px;
}

/* ================= WHY ================= */
.why{ background:var(--paper); }
.why-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:28px;
}
.why-item{ padding-top:2px; }
.why-icon{
  display:inline-flex; align-items:center; justify-content:center;
  width:44px; height:44px;
  border:1.5px solid var(--mica-amber);
  border-radius:50%;
  color:var(--mica-amber-deep);
  margin-bottom:16px;
}
.why-item h3{ font-size:17px; margin-bottom:8px; color:var(--ink); }
.why-item p{ font-size:14px; color:var(--ink-soft); }

/* ================= PROCESS ================= */
.process{ background:var(--mat-green-deep); color:var(--paper-2); }
.process .eyebrow{ color:var(--mica-amber-pale); }
.process .section-head h2{ color:var(--paper-2); }
.process-list{
  display:grid;
  grid-template-columns:repeat(5,1fr);
  gap:20px;
}
.process-list li{
  display:flex; flex-direction:column; gap:14px;
  border-top:2px solid var(--mica-amber);
  padding-top:16px;
}
.step-num{ font-family:var(--font-mono); font-size:13px; color:var(--mica-amber); letter-spacing:0.06em; }
.process-list h3{ font-size:16.5px; color:var(--paper-2); margin-bottom:6px; }
.process-list p{ font-size:13.5px; color:var(--steel); }

/* ================= CONTACT ================= */
.contact{ background:var(--paper-2); }
.contact-inner{
  display:grid;
  grid-template-columns:1.1fr 0.9fr;
  gap:48px;
  align-items:center;
}
.contact-desc{ display:block; color:var(--ink-soft); max-width:520px; margin-bottom:28px; font-size:15.5px; }
.contact h2{ font-size:clamp(26px,3.4vw,36px); margin-bottom:14px; max-width:520px; line-height:1.15; }

.contact-buttons{ display:flex; flex-wrap:wrap; gap:16px; margin-bottom:28px; }
.hotline-big{
  display:inline-flex; flex-direction:column; gap:2px;
  background:var(--mat-green-deep);
  color:var(--paper-2);
  padding:22px 30px;
  border-radius:var(--radius);
  border:1.5px solid var(--mica-amber);
  transition:transform .15s ease, background .15s ease;
}
.hotline-big:hover{ transform:translateY(-2px); background:var(--mat-green); }
.hotline-big-label{ font-family:var(--font-mono); font-size:12px; letter-spacing:0.14em; text-transform:uppercase; color:var(--mica-amber-pale); }
.hotline-big-num{ font-family:var(--font-mono); font-size:32px; font-weight:600; letter-spacing:0.02em; }

.zalo-big{
  display:inline-flex; flex-direction:column; gap:2px; justify-content:center;
  background:transparent;
  color:var(--ink);
  padding:22px 30px;
  border-radius:var(--radius);
  border:1.5px solid rgba(32,38,31,0.25);
  transition:transform .15s ease, border-color .15s ease;
}
.zalo-big:hover{ transform:translateY(-2px); border-color:var(--mica-amber); }
.zalo-big .hotline-big-label{ color:var(--mica-amber-deep); }
.zalo-big .hotline-big-num{ color:var(--ink); font-size:26px; }

.product-loading{
  grid-column:1 / -1;
  text-align:center;
  font-family:var(--font-mono);
  font-size:13.5px;
  color:var(--ink-soft);
  padding:24px 0;
}

.contact-meta{ display:flex; flex-direction:column; gap:14px; }
.contact-meta div{ display:flex; gap:10px; align-items:baseline; border-top:1px dashed rgba(32,38,31,0.2); padding-top:12px; }
.contact-meta dt{ font-family:var(--font-mono); font-size:11.5px; text-transform:uppercase; letter-spacing:0.08em; color:var(--mica-amber-deep); width:110px; flex:none; }
.contact-meta dd{ margin:0; font-size:14.5px; color:var(--ink-soft); }

.mica-swatch{ max-width:320px; margin:0 auto; }
.swatch-bg{ fill:var(--mat-green); }
.swatch-grid line{ stroke:var(--grid-line-strong); stroke-width:1; }
.swatch-piece{ fill:rgba(226,150,63,0.16); stroke:var(--mica-amber); stroke-width:2; }
.swatch-line{ stroke:var(--paper-2); stroke-width:1.4; opacity:0.8; }
.swatch-line-fill{ fill:var(--paper-2); opacity:0.8; }

/* ================= FOOTER ================= */
.site-footer{ background:var(--mat-green-deep); color:var(--steel); padding:34px 0; }
.footer-inner{
  display:flex; align-items:center; justify-content:space-between; gap:20px; flex-wrap:wrap;
}
.footer-brand{ display:flex; flex-direction:column; gap:2px; }
.footer-brand .brand-name{ color:var(--mica-amber-pale); }
.footer-legal{ font-size:12.5px; color:var(--steel); }
.footer-hotline{ font-family:var(--font-mono); font-weight:600; color:var(--paper-2); }
.footer-copy{ font-size:12px; color:var(--steel); width:100%; margin-top:8px; }

/* floating call/zalo buttons — mobile */
.fab-stack{
  position:fixed; right:18px; bottom:18px; z-index:60;
  display:none; flex-direction:column; gap:12px; align-items:flex-end;
}
.fab-call{
  display:flex;
  width:54px; height:54px; border-radius:50%;
  background:var(--mica-amber); color:var(--mat-green-deep);
  align-items:center; justify-content:center;
  box-shadow:0 10px 24px rgba(32,38,31,0.35);
}
.fab-zalo{
  font-family:var(--font-mono); font-weight:700; font-size:13px;
  background:var(--mat-green-deep); color:var(--mica-amber-pale);
  border:1.5px solid var(--mica-amber);
}

.footer-admin-link{ color:var(--steel); text-decoration:underline; text-underline-offset:2px; }
.footer-admin-link:hover{ color:var(--mica-amber-pale); }

/* ================= reveal on scroll ================= */
.reveal{ opacity:0; transform:translateY(18px); transition:opacity .6s ease, transform .6s ease; }
.reveal.in{ opacity:1; transform:none; }

/* ================= RESPONSIVE ================= */
@media (max-width:980px){
  .hero-inner{ grid-template-columns:1fr; }
  .hero-visual{ max-width:360px; margin:0 auto; }
  .about-grid{ grid-template-columns:1fr; }
  .product-grid{ grid-template-columns:1fr 1fr; }
  .why-grid{ grid-template-columns:1fr 1fr; }
  .process-list{ grid-template-columns:1fr 1fr; }
  .contact-inner{ grid-template-columns:1fr; }
  .contact-visual{ order:-1; max-width:280px; margin:0 auto 8px; }
}

@media (max-width:720px){
  .main-nav{
    position:absolute; top:72px; left:0; right:0;
    background:var(--mat-green-deep);
    flex-direction:column; gap:0;
    max-height:0; overflow:hidden;
    border-bottom:1px solid rgba(226,150,63,0.18);
    transition:max-height .25s ease;
  }
  .main-nav.open{ max-height:320px; }
  .main-nav a{ padding:14px 24px; border-top:1px solid rgba(226,150,63,0.1); }
  .hotline-pill{ display:none; }
  .zalo-pill{ display:none; }
  .nav-toggle{ display:flex; }
  .fab-stack{ display:flex; }
  .product-grid{ grid-template-columns:1fr; }
  .why-grid{ grid-template-columns:1fr 1fr; }
  .process-list{ grid-template-columns:1fr; }
  .process-list li{ border-top:none; border-left:2px solid var(--mica-amber); padding:0 0 0 16px; }
  .section{ padding:64px 0; }
}