/*
Theme Name: Trạm Code
Theme URI: https://tramcode.vn
Author: Nguyễn Thành Công Luận
Description: Theme cá nhân cho trang Trạm Code — giáo viên FPT Schools. Trang chủ giới thiệu + blog viết bài, thiết kế xanh brand FPT Schools, tối ưu di động.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.6
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: tramcode
*/

/* ============================================================
   DESIGN TOKENS
   ============================================================ */
:root{
  --blue:#004DD7;
  --blue-dark:#18277C;
  --ink-900:#0B1533;
  --ink-700:#243055;
  --ink:#43506F;
  --orange:#F37021;

  --surface-1:#E8F2FF;
  --surface-2:#F2F6FF;
  --border:#E4EAF6;
  --footer-bg:#0B1444;
  --footer-fg:#9BCBFD;
  --on-blue:#CBE3FE;

  --pill-blue-bg:#E8F2FF;   --pill-blue-fg:#18277C;
  --pill-cyan-bg:#B6EEFD;   --pill-cyan-fg:#06546F;
  --pill-lime-bg:#EAF6C8;   --pill-lime-fg:#42590F;
  --pill-orange-bg:#FFE0C9; --pill-orange-fg:#D75A11;

  --shadow-card:0 8px 28px rgba(0,77,215,.09);
  --shadow-card-hover:0 16px 40px rgba(0,77,215,.16);

  --radius-card:24px;
  --container:1080px;
  --gutter:24px;
  --nav-h:64px;

  --font-display:'Baloo 2', system-ui, sans-serif;
  --font-body:'Be Vietnam Pro', system-ui, -apple-system, sans-serif;
}

/* ============================================================
   BASE
   ============================================================ */
*,*::before,*::after{box-sizing:border-box}
html{
  scroll-behavior:smooth;
  -webkit-text-size-adjust:100%;
  /* clip (khong phai hidden) de khong tao scroll container -> khong lam hong position:sticky */
  overflow-x:clip;
}
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--ink);
  background:#fff;
}
img{max-width:100%;display:block}
h1,h2,h3{font-family:var(--font-display);font-weight:800;color:var(--ink-900);margin:0}
p{margin:0}
a{color:var(--blue)}
a:hover{color:var(--blue-dark)}
ul{list-style:none;margin:0;padding:0}

:focus-visible{outline:3px solid var(--blue);outline-offset:3px;border-radius:6px}

.container{max-width:var(--container);margin:0 auto;padding-left:var(--gutter);padding-right:var(--gutter)}
section[id]{scroll-margin-top:calc(var(--nav-h) + 16px)}

.skip-link{
  position:absolute;left:-9999px;top:0;z-index:100;
  background:var(--blue);color:#fff;padding:12px 20px;border-radius:0 0 12px 0;
  font-size:14px;font-weight:700;text-decoration:none;
}
.skip-link:focus{left:0;color:#fff}

.eyebrow{
  font-size:12px;font-weight:800;letter-spacing:.12em;
  text-transform:uppercase;color:var(--blue);
}
.h2{font-size:30px;line-height:1.18;margin-top:12px}
.accent{color:var(--orange)}

.pill{
  display:inline-block;padding:6px 14px;border-radius:999px;
  font-size:13px;font-weight:600;
}
.pill--cyan{background:var(--pill-cyan-bg);color:var(--pill-cyan-fg)}
.pill--lime{background:var(--pill-lime-bg);color:var(--pill-lime-fg)}
.pill--orange{background:var(--pill-orange-bg);color:var(--pill-orange-fg)}
.pill--blue{background:var(--pill-blue-bg);color:var(--pill-blue-fg)}

/* ============================================================
   BUTTONS  (thay cho FPTSchoolsDesignSystem Button)
   ============================================================ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:999px;font-family:var(--font-body);font-weight:700;
  text-decoration:none;cursor:pointer;white-space:nowrap;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn--lg{padding:0 32px;height:56px;font-size:16px}
.btn--sm{padding:0 20px;height:36px;font-size:14px}

.btn--primary{background:var(--blue);color:#fff;border:2px solid var(--blue)}
.btn--primary:hover{background:var(--blue-dark);border-color:var(--blue-dark);color:#fff;transform:translateY(-2px);box-shadow:0 10px 24px rgba(0,77,215,.28)}

.btn--outline{background:transparent;color:var(--blue);border:2px solid var(--blue)}
.btn--outline:hover{background:var(--blue);color:#fff;transform:translateY(-2px);box-shadow:0 10px 24px rgba(0,77,215,.22)}

/* ============================================================
   NAV
   ============================================================ */
.nav{
  position:sticky;top:0;z-index:20;
  background:rgba(255,255,255,.92);
  -webkit-backdrop-filter:saturate(140%) blur(14px);
  backdrop-filter:saturate(140%) blur(14px);
  border-bottom:1px solid var(--border);
}
.nav__inner{display:flex;align-items:center;gap:28px;padding-top:14px;padding-bottom:14px}
.nav__brand{
  font-family:var(--font-display);font-weight:800;font-size:22px;
  color:var(--blue);letter-spacing:-.01em;text-decoration:none;
}
.nav__links{margin-left:auto;display:flex;align-items:center;gap:22px;font-size:14px;font-weight:600}
.nav__links a{text-decoration:none;color:var(--ink-700);transition:color .16s ease}
.nav__links a:hover{color:var(--blue)}

/* ============================================================
   HERO
   ============================================================ */
.hero{
  position:relative;min-height:660px;
  background:var(--surface-1);
  overflow:hidden;border-radius:0 0 44px 44px;
}
.hero__layer{position:absolute;inset:0;overflow:hidden}
.hero__reveal{
  pointer-events:none;
  -webkit-mask-image:radial-gradient(circle 1px at -999px -999px,#000 0%,transparent 100%);
          mask-image:radial-gradient(circle 1px at -999px -999px,#000 0%,transparent 100%);
  -webkit-mask-repeat:no-repeat; mask-repeat:no-repeat;
  -webkit-mask-composite:source-over; mask-composite:add;
}
.hero__img{
  position:absolute;left:58%;top:-190px;
  height:1180px;width:auto;max-width:none;
  transform:translateX(-42%);
}
.hero__img--gray{filter:grayscale(1) contrast(1.06) brightness(1.02)}
.hero__img--color{filter:saturate(1.08) brightness(1.03)}

.hero__veil-h{position:absolute;inset:0;background:linear-gradient(90deg,#E8F2FF 0%,rgba(232,242,255,.94) 34%,rgba(232,242,255,.35) 56%,rgba(232,242,255,0) 74%)}
.hero__veil-v{position:absolute;inset:0;background:linear-gradient(180deg,rgba(232,242,255,.5) 0%,transparent 26%,transparent 62%,rgba(255,255,255,.85) 100%)}
.hero__dots{
  position:absolute;inset:0;
  background-image:radial-gradient(rgba(101,172,250,.42) 1.6px,transparent 1.6px);
  background-size:14px 14px;
  -webkit-mask-image:linear-gradient(90deg,#000 0%,transparent 52%);
          mask-image:linear-gradient(90deg,#000 0%,transparent 52%);
}
.hero__watermark{
  position:absolute;left:0;right:0;bottom:6px;
  text-align:center;pointer-events:none;user-select:none;-webkit-user-select:none;
  font-family:var(--font-display);font-weight:800;
  font-size:150px;line-height:1;color:rgba(255,255,255,.5);letter-spacing:-.02em;
}
.hero__content{
  position:relative;
  display:grid;grid-template-columns:minmax(0,560px) 1fr;
  padding-top:88px;padding-bottom:96px;
}
.hero__tags{display:flex;gap:8px;flex-wrap:wrap}
.hero h1{font-size:56px;line-height:1.04;letter-spacing:-.02em;margin-top:22px}
.hero h1 .hl{color:var(--blue)}
.hero__lead{margin-top:20px;max-width:520px;font-size:19px;line-height:1.6;color:var(--ink-700);font-weight:600}
.hero__sub{margin-top:14px;max-width:520px;font-size:17px;line-height:1.7;color:var(--ink)}
.hero__cta{display:flex;gap:12px;margin-top:32px;flex-wrap:wrap}

/* ============================================================
   ABOUT
   ============================================================ */
.about{padding-top:80px;padding-bottom:80px}
.about__grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.about__body p{margin-top:16px;font-size:16px;line-height:1.7}
.about__aside{display:flex;flex-direction:column;gap:12px}
.stats{
  background:#fff;border-radius:var(--radius-card);box-shadow:var(--shadow-card);
  padding:24px;display:grid;grid-template-columns:1fr 1fr;gap:20px;
}
.stat__num{font-family:var(--font-display);font-weight:800;font-size:30px;color:var(--blue);line-height:1}
.stat__label{font-size:13px;margin-top:4px}
.creds{display:flex;flex-direction:column;gap:8px}
.creds li{padding:12px 18px;border-radius:999px;font-size:14px;font-weight:600}

/* ============================================================
   POSTS
   ============================================================ */
.posts{padding-top:80px;padding-bottom:80px;background:var(--surface-2)}
.posts__head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}
.posts__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:32px}
.card{
  background:#fff;border-radius:var(--radius-card);box-shadow:var(--shadow-card);
  padding:24px;display:flex;flex-direction:column;gap:12px;
  transition:transform .2s ease,box-shadow .2s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card-hover)}
.card__pill{padding:4px 10px;border-radius:999px;font-size:12px;font-weight:600;align-self:flex-start}
.card h3{font-family:var(--font-body);font-weight:700;font-size:17px;line-height:1.4}
.card p{font-size:14px;line-height:1.7}
.card__link{margin-top:auto;font-size:14px;font-weight:700;text-decoration:none}
.card__link:hover{text-decoration:underline}

/* ============================================================
   SKILLS
   ============================================================ */
.skills{padding-top:80px;padding-bottom:80px}
.skills__grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:48px}
.skills__intro p{margin-top:16px;font-size:16px;line-height:1.7}
.skills__cols{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.skills__col-title{font-size:13px;font-weight:700;color:var(--ink-900);margin-bottom:10px}
.skills__list{display:flex;flex-direction:column;gap:8px}
.skills__list li{padding:10px 16px;border-radius:999px;font-size:14px;font-weight:600}

/* ============================================================
   CONTACT
   ============================================================ */
.contact{
  padding-top:64px;padding-bottom:64px;
  background-image:
    radial-gradient(rgba(255,255,255,.26) 1.6px,transparent 1.6px),
    linear-gradient(150deg,#004DD7 0%,#18277C 100%);
  background-size:14px 14px,cover;
}
.contact__inner{display:flex;align-items:center;gap:32px;flex-wrap:wrap}
.contact__col{flex:1;min-width:320px}
.contact h2{color:#fff}
.contact__lead{margin-top:12px;color:var(--on-blue);font-size:16px;line-height:1.7}
.contact__list{display:grid;gap:10px;margin-top:22px;max-width:460px}
.contact__row{
  display:flex;align-items:center;gap:14px;
  padding:12px 18px;border-radius:999px;
  background:rgba(255,255,255,.12);color:#fff;text-decoration:none;
  font-size:15px;font-weight:600;
  transition:background-color .18s ease,transform .18s ease;
  word-break:break-word;
}
a.contact__row:hover{background:rgba(255,255,255,.24);color:#fff;transform:translateX(3px)}
.contact__icon{
  width:34px;height:34px;flex:0 0 auto;border-radius:999px;
  background:#fff;display:grid;place-items:center;
}
.contact__qr{display:flex;flex-direction:column;align-items:center;gap:12px}
.contact__qr-card{
  width:176px;height:176px;border-radius:20px;overflow:hidden;
  background:#fff;padding:10px;
  box-shadow:0 20px 48px rgba(11,20,68,.24);
}
.contact__qr-card img{width:100%;height:100%;object-fit:contain}
.contact__qr-cap{font-size:13px;color:var(--on-blue);text-align:center}

/* ============================================================
   FOOTER
   ============================================================ */
.footer{background:var(--footer-bg);color:var(--footer-fg);font-size:12px}
.footer .container{padding-top:24px;padding-bottom:24px}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width:1024px){
  .hero h1{font-size:46px}
  .hero__watermark{font-size:110px}
  .hero__content{grid-template-columns:minmax(0,480px) 1fr;padding-top:72px;padding-bottom:88px}
  .about__grid,.skills__grid{gap:36px}
}

@media (max-width:980px){
  .posts__grid{grid-template-columns:repeat(2,1fr)}
}

@media (max-width:860px){
  :root{--gutter:20px}
  .hero{min-height:0;border-radius:0 0 32px 32px}

  /* Ảnh chuyển xuống đáy hero, chữ nằm phía trên trên nền sạch */
  .hero__layer{top:auto;bottom:0;height:300px}
  /* Fade mep tren de anh hoa vao nen, khong bi duong cat ngang.
     Chi ap cho lop nen — lop reveal an han vi spotlight khong chay tren cam ung. */
  .hero__base{
    -webkit-mask-image:linear-gradient(180deg,transparent 0,#000 30%);
            mask-image:linear-gradient(180deg,transparent 0,#000 30%);
  }
  .hero__reveal{display:none}
  .hero__img{left:50%;top:auto;bottom:-30px;height:420px;transform:translateX(-50%)}
  .hero__veil-h{background:linear-gradient(180deg,#E8F2FF 0%,rgba(232,242,255,.92) 34%,rgba(232,242,255,.28) 58%,rgba(232,242,255,0) 78%)}
  .hero__veil-v{background:linear-gradient(180deg,transparent 0%,transparent 60%,rgba(255,255,255,.8) 100%)}
  .hero__dots{-webkit-mask-image:linear-gradient(180deg,#000 0%,transparent 62%);mask-image:linear-gradient(180deg,#000 0%,transparent 62%)}
  .hero__watermark{font-size:52px;bottom:10px}
  .hero__content{grid-template-columns:1fr;padding-top:52px;padding-bottom:320px}
  .hero h1{font-size:40px}
  .hero__lead{font-size:18px}
  .hero__sub{font-size:16px}

  .about,.skills,.posts{padding-top:56px;padding-bottom:56px}
  .about__grid,.skills__grid{grid-template-columns:1fr;gap:32px}
  .h2{font-size:26px}
  .contact__inner{flex-direction:column;align-items:flex-start}
  .contact__col{min-width:0;width:100%}
  .contact__list{max-width:none}
  .contact__qr{align-self:center}
}

@media (max-width:680px){
  .posts__grid{grid-template-columns:1fr}
  .posts__head{align-items:flex-start}
}

@media (max-width:560px){
  :root{--nav-h:96px}
  .nav__inner{flex-direction:column;gap:10px}
  .nav__links{margin-left:0;gap:16px;font-size:13px}
  .hero__content{padding-top:40px;padding-bottom:280px}
  .hero__layer{height:260px}
  .hero__img{height:380px;bottom:-24px}
  .hero h1{font-size:34px}
  .hero__watermark{font-size:38px}
  .hero__cta .btn{flex:1 1 100%}
  .stats{grid-template-columns:1fr 1fr;gap:16px;padding:20px}
  .skills__cols{grid-template-columns:1fr;gap:20px}
  .contact__row{font-size:14px;padding:12px 14px;gap:10px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important}
}

/* ============================================================
   BLOG — danh sách & trang đọc bài (thêm cho WordPress)
   ============================================================ */
.page-head{background:var(--surface-2);padding-top:56px;padding-bottom:40px;border-bottom:1px solid var(--border)}
.page-head .eyebrow{margin-bottom:8px}
.page-head h1{font-family:var(--font-display);font-weight:800;font-size:34px;line-height:1.14;letter-spacing:-.01em;color:var(--ink-900)}
.page-head p{margin-top:10px;font-size:16px;color:var(--ink)}

.postlist{padding-top:48px;padding-bottom:64px}
.postlist__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}

.pagination{display:flex;gap:10px;flex-wrap:wrap;margin-top:40px;justify-content:center}
.pagination .page-numbers{
  display:inline-flex;align-items:center;justify-content:center;min-width:40px;height:40px;padding:0 12px;
  border-radius:999px;background:#fff;border:1px solid var(--border);
  font-weight:600;font-size:14px;color:var(--ink-700);text-decoration:none;
}
.pagination .page-numbers.current{background:var(--blue);border-color:var(--blue);color:#fff}
.pagination a.page-numbers:hover{border-color:var(--blue);color:var(--blue)}

/* Trang đọc một bài */
.article{padding-top:48px;padding-bottom:64px}
.article__wrap{max-width:720px;margin:0 auto}
.article__meta{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:16px}
.article__date{font-size:13px;color:var(--ink);font-weight:600}
.article h1{font-family:var(--font-display);font-weight:800;font-size:clamp(28px,4.5vw,40px);line-height:1.14;letter-spacing:-.01em;color:var(--ink-900);margin-bottom:14px;text-wrap:balance}
.article__thumb{border-radius:20px;overflow:hidden;margin:8px 0 28px;box-shadow:var(--shadow-card)}
.article__thumb img{width:100%;height:auto;display:block}

.article__body{font-size:17px;line-height:1.8;color:var(--ink)}
.article__body > *{margin:0 0 20px}
.article__body h2{font-family:var(--font-display);font-weight:800;font-size:25px;color:var(--ink-900);margin:34px 0 12px}
.article__body h3{font-family:var(--font-display);font-weight:700;font-size:20px;color:var(--ink-900);margin:26px 0 10px}
.article__body a{color:var(--blue);text-decoration:underline}
.article__body img{max-width:100%;height:auto;border-radius:14px}
.article__body blockquote{margin:24px 0;padding:4px 20px;border-left:4px solid var(--blue);background:var(--surface-2);border-radius:0 12px 12px 0;color:var(--ink-700)}
.article__body ul,.article__body ol{padding-left:22px}
.article__body ul{list-style:disc}
.article__body ol{list-style:decimal}
.article__body li{margin-bottom:8px}
.article__body pre{background:#0B1533;color:#E8F2FF;padding:18px;border-radius:14px;overflow-x:auto;font-size:14px}
.article__body code{background:var(--surface-2);padding:2px 6px;border-radius:6px;font-size:.9em}
.article__body pre code{background:none;padding:0}
.article__body iframe{width:100%;border:0;border-radius:16px}

.backlink{display:inline-flex;align-items:center;gap:6px;margin-top:8px;font-weight:700;font-size:14px;text-decoration:none}

@media (max-width:980px){ .postlist__grid{grid-template-columns:repeat(2,1fr)} }
@media (max-width:680px){ .postlist__grid{grid-template-columns:1fr} }