/* ============================================
   HUY HOANG PHAT - Mobile First Stylesheet
   Brand: #dc2626 (red), #0f172a (navy), #ffffff
   ============================================ */

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  font-size:16px;line-height:1.6;color:#0f172a;background:#fff;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:0;background:none}
ul{list-style:none}

:root{
  --red:#dc2626;
  --red-dark:#b91c1c;
  --navy:#0f172a;
  --navy-2:#1e293b;
  --gray:#64748b;
  --gray-light:#f1f5f9;
  --white:#fff;
  --shadow:0 4px 20px rgba(15,23,42,.08);
  --shadow-lg:0 10px 40px rgba(15,23,42,.15);
  --radius:12px;
  --container:1200px;
}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 16px}

/* ============ HEADER ============ */
.header{
  position:sticky;top:0;z-index:50;background:#fff;
  box-shadow:0 2px 10px rgba(0,0,0,.06);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--navy);font-size:16px;line-height:1.15}
.logo-mark{
  width:40px;height:40px;border-radius:10px;
  background:linear-gradient(135deg,var(--red),var(--red-dark));
  color:#fff;display:grid;place-items:center;font-weight:900;font-size:18px;flex-shrink:0;
}
.logo small{display:block;color:var(--gray);font-weight:500;font-size:11px;letter-spacing:.5px;text-transform:uppercase}

.nav-toggle{
  display:flex;flex-direction:column;justify-content:center;gap:5px;
  width:40px;height:40px;border-radius:8px;background:var(--gray-light);
}
.nav-toggle span{display:block;height:2px;width:20px;background:var(--navy);margin:0 auto;border-radius:2px;transition:.25s}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.nav{
  position:fixed;top:64px;left:0;right:0;background:#fff;
  border-top:1px solid #e2e8f0;
  max-height:0;overflow:hidden;transition:max-height .3s ease;
}
.nav.open{max-height:calc(100vh - 64px);overflow:auto}
.nav ul{padding:8px 16px 16px}
.nav a{
  display:block;padding:14px 8px;font-weight:600;color:var(--navy);
  border-bottom:1px solid #f1f5f9;
}
.nav .nav-cta{
  display:block;text-align:center;margin-top:12px;background:var(--red);color:#fff;
  padding:12px 16px;border-radius:8px;border-bottom:0;
}

/* ============ HERO ============ */
.hero{
  position:relative;color:#fff;overflow:hidden;
  background:linear-gradient(135deg,rgba(15,23,42,.92),rgba(15,23,42,.75)),
    url('../images/hero.jpg') center/cover no-repeat;
  padding:48px 0 56px;
}
.hero::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:60px;
  background:linear-gradient(to bottom,transparent,#fff);
}
.hero-tag{
  display:inline-block;background:rgba(220,38,38,.15);border:1px solid rgba(220,38,38,.4);
  color:#fecaca;font-weight:600;font-size:12px;padding:6px 12px;border-radius:999px;
  letter-spacing:.5px;text-transform:uppercase;margin-bottom:16px;
}
.hero h1{
  font-size:30px;line-height:1.2;font-weight:800;margin-bottom:14px;
  letter-spacing:-.5px;
}
.hero h1 span{color:#f87171}
.hero p{font-size:15px;color:#cbd5e1;margin-bottom:24px;max-width:560px}
.hero-cta{display:flex;flex-wrap:wrap;gap:10px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 22px;font-weight:700;border-radius:10px;transition:.2s;
  font-size:15px;
}
.btn-primary{background:var(--red);color:#fff;box-shadow:0 6px 18px rgba(220,38,38,.4)}
.btn-primary:hover{background:var(--red-dark)}
.btn-outline{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.4)}
.btn-outline:hover{background:rgba(255,255,255,.1)}

.hero-stats{
  display:grid;grid-template-columns:repeat(3,1fr);gap:10px;
  margin-top:32px;
}
.hero-stat{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:10px;padding:14px 8px;text-align:center}
.hero-stat b{display:block;color:#fff;font-size:22px;font-weight:800}
.hero-stat span{font-size:11px;color:#cbd5e1}

/* ============ SECTIONS ============ */
section{padding:56px 0}
.section-head{text-align:center;margin-bottom:32px}
.section-head .eyebrow{
  display:inline-block;color:var(--red);font-weight:700;font-size:12px;
  letter-spacing:1.5px;text-transform:uppercase;margin-bottom:10px;
}
.section-head h2{font-size:26px;line-height:1.25;color:var(--navy);font-weight:800;margin-bottom:10px}
.section-head p{color:var(--gray);font-size:15px;max-width:640px;margin:0 auto}

/* About */
.about-grid{display:grid;gap:24px}
.about-text h3{font-size:20px;color:var(--navy);margin-bottom:12px;font-weight:700}
.about-text p{color:var(--gray);margin-bottom:12px;font-size:15px}
.about-list{margin-top:16px}
.about-list li{
  display:flex;gap:10px;padding:8px 0;color:var(--navy);font-weight:500;font-size:14px;
}
.about-list li::before{
  content:"✓";color:var(--red);font-weight:800;flex-shrink:0;
  width:22px;height:22px;background:#fee2e2;border-radius:50%;display:grid;place-items:center;font-size:12px;
}

/* Services */
.services-grid{display:grid;grid-template-columns:1fr;gap:14px}
.service-card{
  background:#fff;border:1px solid #e2e8f0;border-radius:var(--radius);
  padding:20px;transition:.2s;
}
.service-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:var(--red)}
.service-icon{
  width:48px;height:48px;border-radius:10px;background:#fee2e2;color:var(--red);
  display:grid;place-items:center;font-size:24px;margin-bottom:14px;
}
.service-card h3{font-size:17px;color:var(--navy);margin-bottom:8px;font-weight:700}
.service-card p{color:var(--gray);font-size:14px}

/* Capacity */
.capacity{background:var(--navy);color:#fff}
.capacity .section-head h2{color:#fff}
.capacity .section-head p{color:#cbd5e1}
.cap-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.cap-card{
  background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);
  border-radius:var(--radius);padding:20px 16px;text-align:center;
}
.cap-card b{display:block;font-size:28px;color:#fff;font-weight:800;line-height:1}
.cap-card .red{color:#f87171}
.cap-card span{display:block;color:#cbd5e1;font-size:13px;margin-top:6px}

/* Projects */

.project-filters{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:10px;
  margin:-10px 0 26px;
}
.project-filter{
  border:1px solid #cbd5e1;
  background:#fff;
  color:var(--navy);
  padding:10px 16px;
  border-radius:999px;
  font-weight:700;
  font-size:14px;
  cursor:pointer;
  transition:.25s;
}
.project-filter:hover,
.project-filter.active{
  background:var(--red);
  border-color:var(--red);
  color:#fff;
  box-shadow:var(--shadow);
}
.project-empty{
  grid-column:1/-1;
  text-align:center;
  padding:26px;
  border:1px dashed #cbd5e1;
  border-radius:12px;
  color:#64748b;
  background:#fff;
}

.projects-grid{display:grid;grid-template-columns:1fr;gap:18px}
.project-card{
  background:#fff;border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow);transition:.25s;display:block;
}
.project-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.project-thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:#e2e8f0}
.project-thumb img{width:100%;height:100%;object-fit:cover;transition:.4s}
.project-card:hover .project-thumb img{transform:scale(1.05)}
.project-cat{
  position:absolute;top:12px;left:12px;background:var(--red);color:#fff;
  font-size:10px;font-weight:700;padding:5px 10px;border-radius:6px;letter-spacing:.5px;
}
.project-body{padding:16px}
.project-body h3{font-size:16px;color:var(--navy);font-weight:700;line-height:1.4;margin-bottom:8px}
.project-body .more{color:var(--red);font-weight:700;font-size:13px;display:inline-flex;align-items:center;gap:4px}

/* Process */
.process-grid{display:grid;grid-template-columns:1fr;gap:14px;counter-reset:step}
.step{
  background:#fff;border-left:4px solid var(--red);padding:18px 18px 18px 56px;
  border-radius:8px;box-shadow:var(--shadow);position:relative;counter-increment:step;
}
.step::before{
  content:counter(step,decimal-leading-zero);
  position:absolute;left:14px;top:18px;
  font-weight:900;color:var(--red);font-size:22px;
}
.step h3{font-size:16px;color:var(--navy);margin-bottom:4px;font-weight:700}
.step p{color:var(--gray);font-size:13px}

/* Partners */
.partners{background:var(--gray-light)}
.partners-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:10px;
}
.partner{
  background:#fff;border-radius:8px;aspect-ratio:2/1;display:grid;place-items:center;
  font-weight:700;color:var(--navy);font-size:13px;padding:10px;text-align:center;
  box-shadow:0 1px 3px rgba(0,0,0,.04);
}

/* Contact */
.contact{background:linear-gradient(135deg,var(--navy),var(--navy-2));color:#fff}
.contact .section-head h2{color:#fff}
.contact .section-head p{color:#cbd5e1}
.contact-grid{display:grid;grid-template-columns:1fr;gap:14px;margin-top:8px}
.contact-card{
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);
  border-radius:var(--radius);padding:18px;display:flex;gap:14px;align-items:flex-start;
}
.contact-card .ic{
  width:44px;height:44px;border-radius:10px;background:var(--red);color:#fff;
  display:grid;place-items:center;font-size:20px;flex-shrink:0;
}
.contact-card b{display:block;font-size:13px;color:#cbd5e1;font-weight:500;margin-bottom:2px}
.contact-card span{display:block;color:#fff;font-weight:700;font-size:15px;word-break:break-word}

/* Footer */
.footer{background:#020617;color:#94a3b8;padding:40px 0 100px;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:28px;margin-bottom:24px}
.footer h4{color:#fff;font-size:14px;font-weight:700;margin-bottom:14px;text-transform:uppercase;letter-spacing:.5px}
.footer ul li{padding:5px 0}
.footer-bottom{border-top:1px solid #1e293b;padding-top:18px;text-align:center;font-size:12px}

/* Floating mobile call buttons */
.float-actions{
  position:fixed;bottom:0;left:0;right:0;display:grid;grid-template-columns:1fr 1fr;
  z-index:40;box-shadow:0 -4px 20px rgba(0,0,0,.15);
}
.float-actions a{
  display:flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 8px;color:#fff;font-weight:700;font-size:14px;
}
.float-call{background:var(--red)}
.float-zalo{background:#0068ff}

/* ============ PROJECT DETAIL PAGE ============ */
.project-hero{
  position:relative;color:#fff;
  background:linear-gradient(180deg,rgba(15,23,42,.55),rgba(15,23,42,.85)),
    var(--proj-img,linear-gradient(135deg,#0f172a,#1e293b)) center/cover no-repeat;
  padding:60px 0 50px;
}
.project-hero .crumbs{font-size:13px;color:#cbd5e1;margin-bottom:12px}
.project-hero .crumbs a{color:#fff}
.project-hero h1{font-size:26px;line-height:1.25;font-weight:800;max-width:800px}
.project-hero .meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.project-hero .meta span{
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.15);
  padding:6px 12px;border-radius:6px;font-size:13px;
}

.proj-info{display:grid;grid-template-columns:1fr;gap:14px;margin-top:8px}
.info-row{
  background:#fff;border:1px solid #e2e8f0;border-radius:10px;padding:14px 16px;
  display:flex;justify-content:space-between;gap:14px;align-items:center;
}
.info-row b{color:var(--gray);font-weight:500;font-size:13px}
.info-row span{color:var(--navy);font-weight:700;text-align:right;font-size:14px}

.scope-list{margin-top:16px}
.scope-list li{
  display:flex;gap:10px;padding:10px 0;border-bottom:1px dashed #e2e8f0;
  color:var(--navy);font-size:15px;
}
.scope-list li::before{content:"●";color:var(--red);flex-shrink:0}

.gallery{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;margin-top:8px}
.gallery img{aspect-ratio:1/1;object-fit:cover;border-radius:8px;cursor:pointer}

.proj-cta{
  background:linear-gradient(135deg,var(--red),var(--red-dark));color:#fff;
  border-radius:var(--radius);padding:24px;text-align:center;margin-top:24px;
}
.proj-cta h3{font-size:20px;margin-bottom:6px;font-weight:800}
.proj-cta p{margin-bottom:16px;font-size:14px;opacity:.95}
.proj-cta-btns{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.proj-cta .btn{background:#fff;color:var(--red)}
.proj-cta .btn.zalo{background:#0068ff;color:#fff}

/* ============ TABLET (>=768) ============ */
@media (min-width:768px){
  .hero{padding:80px 0 100px}
  .hero h1{font-size:44px}
  .hero p{font-size:17px}
  .hero-stats{max-width:560px}
  .section-head h2{font-size:34px}
  .services-grid{grid-template-columns:repeat(2,1fr);gap:18px}
  .cap-grid{grid-template-columns:repeat(4,1fr)}
  .projects-grid{grid-template-columns:repeat(2,1fr)}
  .process-grid{grid-template-columns:repeat(2,1fr)}
  .partners-grid{grid-template-columns:repeat(6,1fr)}
  .contact-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:2fr 1fr 1fr 1fr}
  .footer{padding-bottom:40px}
  .float-actions{display:none}
  .about-grid{grid-template-columns:1.1fr 1fr;align-items:center}
  .project-hero h1{font-size:36px}
  .proj-info{grid-template-columns:repeat(2,1fr)}
  .gallery{grid-template-columns:repeat(3,1fr)}
}

/* ============ DESKTOP (>=1024) ============ */
@media (min-width:1024px){
  .nav-toggle{display:none}
  .nav{position:static;max-height:none;overflow:visible;border:0;background:transparent}
  .nav ul{display:flex;align-items:center;gap:4px;padding:0}
  .nav a{border:0;padding:8px 14px;font-size:14px;border-radius:6px}
  .nav a:hover{color:var(--red)}
  .nav .nav-cta{margin-top:0;margin-left:8px;padding:10px 18px}
  .services-grid{grid-template-columns:repeat(3,1fr)}
  .projects-grid{grid-template-columns:repeat(3,1fr)}
  .process-grid{grid-template-columns:repeat(4,1fr)}
  .hero h1{font-size:54px}
  .container{padding:0 24px}
}


/* ============ PRO PROJECT UPGRADE ============ */
.project-body p{color:var(--gray);font-size:13px;margin-bottom:8px;line-height:1.5}
.project-pagination{display:flex;justify-content:center;gap:8px;flex-wrap:wrap;margin-top:28px}
.project-pagination button{min-width:40px;height:40px;border:1px solid #cbd5e1;background:#fff;color:var(--navy);border-radius:8px;font-weight:800;cursor:pointer;transition:.2s}
.project-pagination button:hover:not(:disabled),.project-pagination button.active{background:var(--red);border-color:var(--red);color:#fff}
.project-pagination button:disabled{opacity:.45;cursor:not-allowed}
.projects-more{text-align:center;margin-top:22px}.projects-more .btn{display:inline-flex}
.proj-info.pro-info-static{grid-template-columns:1fr;max-width:920px;margin-left:auto;margin-right:auto}
.info-row{align-items:flex-start}.info-row b{min-width:150px;color:var(--navy);font-weight:800}.info-row b::after{content}.info-row span{text-align:left;flex:1;line-height:1.7}
.project-content{max-width:920px;margin:22px auto 0;color:var(--gray);font-size:16px;line-height:1.8;background:#fff;border:1px solid #e2e8f0;border-radius:12px;padding:20px}
.project-content p{margin-bottom:12px}.project-content p:last-child{margin-bottom:0}
.project-gallery{max-width:960px;margin:0 auto}.gallery-main{position:relative;border-radius:14px;overflow:hidden;box-shadow:var(--shadow-lg);background:#e2e8f0;cursor:zoom-in}.gallery-main img{width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;display:block}.gallery-main::after{content:"Nhấp để phóng to";position:absolute;right:12px;bottom:12px;background:rgba(15,23,42,.72);color:#fff;font-weight:700;font-size:12px;border-radius:999px;padding:7px 12px}.gallery-thumbs{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:12px}.gallery-thumbs img{width:100%;aspect-ratio:1/1;object-fit:cover;border-radius:10px;cursor:pointer;border:3px solid transparent;opacity:.75;transition:.2s}.gallery-thumbs img:hover,.gallery-thumbs img.active{opacity:1;border-color:var(--red);transform:translateY(-2px)}
.lightbox{position:fixed;inset:0;background:rgba(2,6,23,.92);z-index:999;display:none;align-items:center;justify-content:center;padding:24px}.lightbox.open{display:flex}.lightbox img{max-width:92vw;max-height:82vh;border-radius:10px;box-shadow:0 20px 60px rgba(0,0,0,.4)}.lightbox-close,.lightbox-nav{position:absolute;border:0;background:rgba(255,255,255,.14);color:#fff;cursor:pointer;border-radius:999px;display:grid;place-items:center}.lightbox-close{top:18px;right:18px;width:44px;height:44px;font-size:32px}.lightbox-nav{top:50%;transform:translateY(-50%);width:48px;height:48px;font-size:40px}.lightbox-nav.prev{left:18px}.lightbox-nav.next{right:18px}.lightbox-title{position:absolute;bottom:18px;left:50%;transform:translateX(-50%);color:#fff;background:rgba(255,255,255,.14);border-radius:999px;padding:8px 14px;font-weight:700}
@media (min-width:768px){.gallery-thumbs{grid-template-columns:repeat(6,1fr)}.proj-info.pro-info-static{grid-template-columns:repeat(2,1fr)}}