/* =========================================================
   Viet Hung – stylesheet chuẩn hóa
   1 font · 4 độ đậm · 1 thang cỡ chữ · 1 header cho mọi trang
   ========================================================= */

/* ---------- 1. Font (self-host) ---------- */
@font-face{font-family:"Be Vietnam Pro";src:url(/assets/fonts/bvp-regular.woff2) format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"Be Vietnam Pro";src:url(/assets/fonts/bvp-medium.woff2) format("woff2");font-weight:500;font-display:swap}
@font-face{font-family:"Be Vietnam Pro";src:url(/assets/fonts/bvp-semibold.woff2) format("woff2");font-weight:600;font-display:swap}
@font-face{font-family:"Be Vietnam Pro";src:url(/assets/fonts/bvp-bold.woff2) format("woff2");font-weight:700;font-display:swap}

/* ---------- 2. Design tokens ---------- */
:root{
  /* màu */
  --cyan:#1497D4; --cyan-strong:#0B6FA4; --cyan-hover:#095C88; --cyan-light:#5FC0EE; --cyan-pale:#9FD8F3;
  --navy:#0F2C4C; --ink:#17222E; --muted:#55657A; --on-dark:#D6E6F1;
  --mist:#EAF4FA; --paper:#FFFFFF; --line:#CFE3EF; --green:#3A9A3E; --red:#D7262E; --zalo:#0068FF;

  /* font */
  --font:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --w-regular:400; --w-medium:500; --w-semibold:600; --w-bold:700;

  /* thang cỡ chữ (mobile → desktop, co giãn mượt) */
  --fs-xs:13px;                              /* ghi chú, copyright */
  --fs-sm:14px;                              /* breadcrumb, nút, nhãn nhỏ */
  --fs-nav:15px;                             /* menu */
  --fs-base:clamp(16px,.95rem + .15vw,17px); /* nội dung */
  --fs-lg:clamp(17px,1rem + .3vw,19px);      /* đoạn dẫn */
  --fs-h3:clamp(17px,1rem + .35vw,20px);
  --fs-h2:clamp(26px,1.3rem + 1.5vw,36px);
  --fs-h1:clamp(32px,1.4rem + 2.6vw,52px);
  --fs-num:clamp(38px,1.6rem + 2.4vw,54px);  /* số liệu */

  /* giãn dòng */
  --lh-tight:1.15; --lh-heading:1.25; --lh-body:1.7;

  /* header */
  --header-h:80px; --logo-h:52px;

  /* khoảng cách */
  --section-y:clamp(64px,5vw + 32px,96px);
  --gap:clamp(24px,3vw,56px);
  --radius:2px;
}
@media (max-width:960px){:root{--header-h:64px;--logo-h:40px}}

/* ---------- 3. Base ---------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 16px);-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important}}
body{margin:0;font-family:var(--font);font-size:var(--fs-base);font-weight:var(--w-regular);line-height:var(--lh-body);
  color:var(--ink);background:var(--paper);text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%;height:auto}
a{color:var(--cyan-strong)}
a:hover{color:var(--cyan-hover)}
button{font-family:inherit}
:focus-visible{outline:3px solid var(--cyan);outline-offset:3px}
.wrap{width:min(1160px,100% - 40px);margin-inline:auto}

h1,h2,h3{margin:0;font-weight:var(--w-bold);color:var(--navy)}
h1{font-size:var(--fs-h1);line-height:var(--lh-tight);letter-spacing:-.015em}
h2{font-size:var(--fs-h2);line-height:var(--lh-heading);letter-spacing:-.01em;margin-bottom:28px}
h2::before{content:"";display:block;width:56px;height:6px;background:var(--cyan);transform:skewX(-20deg);margin-bottom:18px}
h3{font-size:var(--fs-h3);line-height:1.4;font-weight:var(--w-semibold);margin-bottom:10px}
p{margin:0 0 1.1em}
.prose p,.cap li{max-width:64ch}


/* tiện ích */
.flush{padding:0!important}
.mt{margin-top:24px}
.skip{position:absolute;left:-9999px;top:8px;z-index:100;background:var(--paper);padding:8px 12px}
.skip:focus{left:8px}
.hp{position:absolute;left:-9999px}

/* ---------- 4. Header (dùng chung mọi trang) ---------- */
header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.97);backdrop-filter:blur(6px);
  border-bottom:1px solid var(--line);padding-top:env(safe-area-inset-top,0px)}
.bar{position:relative;display:flex;align-items:center;justify-content:space-between;gap:24px;height:var(--header-h)}
.bar > a{display:block;flex-shrink:0}
.bar img{height:var(--logo-h);width:auto}
nav{display:flex;align-items:center;gap:clamp(14px,1.6vw,28px)}
nav a{font-size:var(--fs-nav);font-weight:var(--w-medium);line-height:1;color:var(--navy);text-decoration:none;
  padding:10px 0;white-space:nowrap}
nav a:hover{color:var(--cyan-strong)}
nav a[aria-current="page"]{color:var(--cyan-strong);box-shadow:inset 0 -3px 0 var(--cyan)}
.lang,.burger{display:inline-block;text-decoration:none;font-size:var(--fs-sm);font-weight:var(--w-semibold);line-height:1;color:var(--navy);background:none;
  border:1.5px solid var(--navy);border-radius:var(--radius);padding:9px 12px;cursor:pointer}
.lang:hover,.burger:hover{background:var(--navy);color:#fff}
.burger{display:none}
nav a.lang{padding:9px 12px;line-height:1}
@media (max-width:960px){
  .burger{display:block}
  nav{display:none;position:absolute;top:var(--header-h);left:-20px;right:-20px;flex-direction:column;align-items:stretch;gap:0;
    background:var(--paper);border-bottom:2px solid var(--cyan);box-shadow:0 8px 20px rgba(15,44,76,.12)}
  nav.open{display:flex}
  nav a{font-size:16px;padding:16px 20px;border-top:1px solid var(--line)}
  nav a[aria-current="page"]{box-shadow:inset 4px 0 0 var(--cyan)}
  .lang{margin:12px 20px;align-self:flex-start}
}

/* ---------- 5. Nút ---------- */
.btn{display:inline-block;font-size:var(--fs-sm);font-weight:var(--w-semibold);line-height:1;letter-spacing:.01em;
  text-decoration:none;border-radius:var(--radius);padding:14px 22px;border:1.5px solid transparent;cursor:pointer}
.btn.primary{background:var(--cyan-strong);color:#fff}
.btn.primary:hover{background:var(--cyan-hover);color:#fff}
.btn.outline{border-color:var(--navy);color:var(--navy);background:none}
.btn.outline:hover{background:var(--navy);color:#fff}
.btn.ghost:hover{color:#fff}
.btn.ghost{border-color:rgba(255,255,255,.5);color:#fff;background:none}
.btn.ghost:hover{border-color:#fff}
.cta{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- 6. Hero (trang chủ, hồ sơ) ---------- */
.hero{position:relative;background:var(--navy);color:#fff;overflow:hidden}
.hero{--split:52%}
.hero-grid{display:grid;grid-template-columns:var(--split) 1fr;min-height:clamp(480px,72vh,620px)}
.hero-text{position:relative;z-index:2;display:flex;flex-direction:column;justify-content:center;
  padding:64px 56px 64px max(20px,calc((100vw - 1160px)/2))}
.hero h1{text-wrap:balance}
/* Tiêu đề nhiều dòng căn đều: mỗi dòng .fit-<lang>-<n> được build.py sinh cỡ chữ = min(1.5em, K·cqi) hơi nhỏ hơn bề rộng cột,
   rồi text-align-last:justify giãn khoảng cách giữa các từ để mọi dòng đúng bằng bề rộng cột.
   để mọi dòng có cùng bề rộng với cột chữ. */
.hero h1:has(.fit){container-type:inline-size;max-width:600px}
.hero h1 .fit{display:block;white-space:nowrap;line-height:1.12;text-align:justify;text-align-last:justify}
.hero h1 .fit + .fit{margin-top:.08em}
@supports not (font-size:1cqi){.hero h1 .fit{white-space:normal}}
.kicker{font-size:var(--fs-sm);font-weight:var(--w-medium);color:var(--cyan-pale);margin:0 0 14px}
.hero h1{color:#fff;margin-bottom:24px}
.hero h1 .sub{display:block;margin-top:14px;font-size:var(--fs-lg);font-weight:var(--w-medium);line-height:1.4;letter-spacing:0;color:var(--cyan-light)}
.lead{font-size:var(--fs-base);color:var(--on-dark);max-width:30em;margin:0 0 32px}
.hero-photo{position:relative;clip-path:polygon(18% 0,100% 0,100% 100%,0 100%)}
.hero-photo img{width:100%;height:100%;object-fit:cover;object-position:40% center}
.hero-photo::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(15,44,76,.35),transparent 40%)}
.stripe{position:absolute;left:calc(var(--split) - 2.5%);top:0;bottom:0;width:70px;background:var(--cyan);transform:skewX(-10deg);z-index:1;opacity:.9}
@media (max-width:860px){
  .hero-grid{grid-template-columns:1fr;min-height:0}
  .hero-photo{order:-1;height:260px;clip-path:polygon(0 14%,100% 0,100% 100%,0 100%)}
  .hero-text{padding:32px 20px 48px}
  .stripe{display:none}
}

/* ---------- 7. Đầu trang con ---------- */
.pagehead{position:relative;overflow:hidden;background:var(--navy);color:#fff;padding:clamp(44px,5vw,64px) 0 clamp(40px,4.5vw,56px)}
.pagehead::after{content:"";position:absolute;right:-60px;top:0;bottom:0;width:240px;background:var(--cyan);transform:skewX(-14deg);opacity:.9}
.pagehead h1{color:#fff;position:relative;z-index:1}
.pagehead p{position:relative;z-index:1;margin:12px 0 0;max-width:40em;color:var(--on-dark)}
.crumb{position:relative;z-index:1;font-size:var(--fs-sm);color:var(--cyan-pale);margin-bottom:12px}
.crumb a{color:var(--cyan-pale)}
@media (max-width:760px){.pagehead::after{width:120px;right:-50px}}

/* ---------- 8. Section chung ---------- */
section{padding:var(--section-y) 0}

/* thư ngỏ */
.letter{display:grid;grid-template-columns:1.1fr .9fr;gap:var(--gap);align-items:center}
.letter figure{margin:0;clip-path:polygon(0 0,100% 0,100% 86%,82% 100%,0 100%)}
.letter figure img{width:100%;aspect-ratio:3/2;object-fit:cover;object-position:center 60%}
@media (max-width:860px){.letter{grid-template-columns:1fr}}

/* số liệu */
.band{background:#0B78B5;color:#fff;padding:0}
.nums{display:grid;grid-template-columns:repeat(4,1fr)}
.num{padding:40px 24px;border-left:1px solid rgba(255,255,255,.3)}
.num:first-child{border-left:0}
.num b{display:block;font-size:var(--fs-num);font-weight:var(--w-bold);line-height:1}
.num span{display:block;margin-top:10px;font-size:var(--fs-sm);line-height:1.5;color:#fff}
@media (max-width:760px){
  .nums{grid-template-columns:1fr 1fr}
  .num{padding:28px 20px;border-top:1px solid rgba(255,255,255,.3)}
  .num:nth-child(-n+2){border-top:0}.num:nth-child(3){border-left:0}
}

/* giới thiệu chung */
.info{background:var(--mist)}
.info-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:var(--gap);align-items:center}
.info-photo{clip-path:polygon(0 0,100% 0,100% 100%,22% 100%)}
.info-photo img{width:100%;aspect-ratio:4/3;object-fit:cover}
dl{display:grid;grid-template-columns:minmax(180px,38%) 1fr;margin:0;border-top:2px solid var(--navy)}
dt,dd{margin:0;padding:14px 0;border-bottom:1px solid var(--line)}
dt{font-weight:var(--w-semibold);color:var(--navy);padding-right:20px}
@media (max-width:860px){
  .info-grid{grid-template-columns:1fr}.info-photo{display:none}
  dl{grid-template-columns:1fr}dt{padding-bottom:0;border-bottom:0}
}

/* năng lực */
.cap{display:grid;grid-template-columns:repeat(2,1fr);gap:48px var(--gap)}
.cap article{border-top:1px solid var(--line);padding-top:24px}
.cap ul{margin:0;padding-left:1.1em}
.cap li{margin-bottom:.5em}
.cap li::marker{color:var(--cyan)}
@media (max-width:760px){.cap{grid-template-columns:1fr}}

/* tàu + xe */
.split{display:grid;grid-template-columns:1fr 1fr;min-height:clamp(420px,52vw,560px);background:var(--navy);color:#fff}
.split .pic{position:relative}
.split .pic img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center 40%}
.split .txt{display:flex;flex-direction:column;justify-content:center;padding:72px max(20px,calc((100vw - 1160px)/2)) 72px 64px}
.split h2{color:#fff}
.split p{color:var(--on-dark);max-width:34em}
.route{display:grid;gap:14px;margin-top:16px}
.route div{display:flex;align-items:baseline;gap:16px;padding-bottom:14px;border-bottom:1px solid rgba(255,255,255,.18)}
.route b{min-width:1.4em;font-size:var(--fs-num);font-weight:var(--w-bold);line-height:1;color:var(--cyan)}
@media (max-width:860px){.split{grid-template-columns:1fr}.split .pic{height:300px}.split .txt{padding:48px 20px}}

/* thẻ dịch vụ */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.card{border-top:4px solid var(--cyan);padding-top:20px}
.card img{width:100%;aspect-ratio:3/2;object-fit:cover;margin-bottom:16px}
@media (max-width:860px){.cards{grid-template-columns:1fr}}

/* đội xe (ô kim cương) */
.gallery{--cols:4;display:grid;grid-template-columns:repeat(var(--cols),1fr);gap:0 8px;margin-top:40px;
  padding-bottom:calc(100% / var(--cols) * .76 / 2)}
.gallery img{width:100%;aspect-ratio:520/396;object-fit:contain}
.gallery img:nth-child(even){transform:translateY(50%)}
.wide{display:grid;grid-template-columns:1.4fr 1fr;gap:8px;height:clamp(240px,30vw,400px)}
.wide img{width:100%;height:100%;object-fit:cover}
.wide-section{padding:0 0 var(--section-y)}
@media (max-width:760px){
  .gallery{--cols:2}
  .wide{grid-template-columns:1fr;height:auto}.wide img{height:auto;aspect-ratio:16/10}
}

/* trang hình ảnh */
.photos{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.photos button{display:block;padding:0;border:0;background:none;cursor:zoom-in}
.photos img{width:100%;aspect-ratio:3/2;object-fit:cover}
@media (max-width:760px){.photos{grid-template-columns:1fr 1fr}}
.lightbox{position:fixed;inset:0;z-index:50;display:flex;align-items:center;justify-content:center;padding:24px;background:rgba(10,20,32,.92)}
.lightbox[hidden]{display:none}
.lightbox img{max-height:86vh;width:auto}
.lightbox .lb-prev,.lightbox .lb-next{position:absolute;top:50%;transform:translateY(-50%);font-size:32px;line-height:1;padding:10px 16px;background:#fff;border:0;border-radius:var(--radius);cursor:pointer}
.lightbox .lb-prev{left:16px}.lightbox .lb-next{right:16px}
.lightbox .lb-close{position:absolute;top:calc(16px + env(safe-area-inset-top,0px));right:16px;font-size:var(--fs-sm);font-weight:var(--w-semibold);
  background:#fff;border:0;border-radius:var(--radius);padding:9px 14px;cursor:pointer}

/* tin tức */
.empty{border:2px dashed var(--line);padding:48px 24px;text-align:center;color:var(--muted)}

/* liên hệ */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--gap)}
.map-embed{display:block;width:100%;aspect-ratio:4/3;border:0}
form label{display:block;margin:16px 0 6px;font-size:var(--fs-sm);font-weight:var(--w-semibold);color:var(--navy)}
form input,form textarea{width:100%;font:var(--w-regular) 16px/1.5 var(--font);padding:12px;border:1.5px solid var(--line);border-radius:var(--radius)}
form input:focus,form textarea:focus{border-color:var(--cyan);outline:none}
form textarea{min-height:140px;resize:vertical}
form ::placeholder{color:#66768A;opacity:1}          /* 4.64:1 trên nền trắng */
form label .req,form label .opt{font-weight:var(--w-regular);color:var(--muted)}
.notice{margin-bottom:20px;padding:14px 16px;border-left:4px solid var(--green);background:#EEF7EE}
.notice.err{border-color:var(--red);background:#FCEDEE}
@media (max-width:860px){.contact-grid{grid-template-columns:1fr}}

/* ---------- 9. Footer ---------- */
footer{background:var(--ink);color:#C9D6E0;padding:72px 0 calc(40px + env(safe-area-inset-bottom,0px))}
.foot{display:grid;grid-template-columns:1.2fr 1fr;gap:48px}
footer h2{color:#fff}
footer a{color:var(--cyan-pale)}
.foot-logo{display:inline-block;background:#fff;padding:14px 18px;margin-bottom:24px}
.foot-logo img{height:var(--logo-h);width:auto}
.contact p{margin:0 0 10px}
.contact strong{display:inline-block;min-width:92px;font-weight:var(--w-semibold);color:#fff}
.copy{margin-top:56px;padding-top:20px;border-top:1px solid #2C3A48;font-size:var(--fs-xs);color:#8A9AA8}
@media (max-width:760px){.foot{grid-template-columns:1fr}}

/* ---------- 10. Nút liên hệ nổi ---------- */
.fab{position:fixed;right:16px;bottom:calc(16px + env(safe-area-inset-bottom,0px));z-index:30;display:flex;flex-direction:column;align-items:flex-end;gap:8px}
.fab a,.fab button{display:flex;align-items:center;gap:8px;font-size:var(--fs-sm);font-weight:var(--w-semibold);line-height:1;color:#fff;
  text-decoration:none;border:0;border-radius:24px;padding:12px 16px;box-shadow:0 4px 14px rgba(0,0,0,.18);cursor:pointer}
.fab .call{background:#C21F27}.fab .zalo{background:var(--zalo)}.fab .dir{background:var(--navy)}.fab .sms{background:#2E7D32}
.fab button{background:var(--cyan-strong)}
.fab .more{display:none;flex-direction:column;align-items:flex-end;gap:8px}
.fab.open .more{display:flex}
@media (prefers-reduced-motion:no-preference){.fab .call{animation:ring 2.4s ease-in-out infinite}}
@keyframes ring{0%,85%,100%{transform:none}90%{transform:rotate(-4deg)}95%{transform:rotate(4deg)}}

/* fab: ẩn bằng thuộc tính hidden thay vì class */
.fab .more[hidden]{display:none}
.fab.open .more{display:flex}

/* ---- sinh tự động bởi build.py: hero_fit_css() ---- */
.hero h1 .fit-vi-0{font-size:min(1.5em,6.11cqi)}  /* CÔNG TY CỔ PHẦN PHÁT TRIỂN */
.hero h1 .fit-vi-1{font-size:min(1.5em,9.88cqi)}  /* VẬN TẢI VIỆT HƯNG */
.hero h1 .fit-en-0{font-size:min(1.5em,6.37cqi)}  /* VIET HUNG TRANSPORTATION */
.hero h1 .fit-en-1{font-size:min(1.5em,5.73cqi)}  /* DEVELOPMENT JOINT STOCK CO. */