/*
Theme Name: Tiếng Việt Sống
Theme URI: https://hongdiem.com
Author: Hồng Diễm
Author URI: https://hongdiem.com
Description: Theme riêng cho thương hiệu Tiếng Việt Sống của Hồng Diễm — dạy tiếng Việt gắn liền văn hóa & đào tạo giáo viên. Thiết kế tối giản, trí thức: nền trắng, mực gần đen, một màu nhấn xanh rêu; tiêu đề Bricolage Grotesque, thân bài Montserrat.
Version: 1.4.3
Requires at least: 5.5
Tested up to: 7.0
Requires PHP: 7.2
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: tieng-viet-song
*/

/* =========================================================
   TIẾNG VIỆT SỐNG — Bộ khung thiết kế
   ========================================================= */

:root{
  --cream:    #F6F5F0;
  --cream-2:  #EDEBE2;
  --paper:    #FFFFFF;
  --ink:      #211F1B;
  --ink-soft: #4B473F;
  --muted:    #837C6E;

  --accent:    #274E13;
  --accent-700:#1C3A0E;
  --accent-100:#E8ECE0;

  --green: var(--accent); --green-700: var(--accent-700); --green-100: var(--accent-100);
  --terra: var(--accent); --terra-600: var(--accent-700);
  --gold: var(--accent); --gold-100: #EDF1E6;
  --blue: var(--accent);

  --line:     #E7E3D9;
  --shadow-sm: 0 1px 2px rgba(33,31,27,.03), 0 4px 14px rgba(33,31,27,.05);
  --shadow-md: 0 10px 28px rgba(33,31,27,.08);
  --radius:   12px;
  --radius-lg:18px;

  --container: 1180px;
  /* Tên biến giữ nguyên cho khỏi phải sửa cả file, nhưng giá trị KHÔNG còn là serif.
     Trùng với lớp Additional CSS trong Customizer — để lỡ lớp kia bị xoá thì font vẫn đúng. */
  --font-serif: 'Bricolage Grotesque', 'Montserrat', sans-serif;
  --font-sans:  'Montserrat', 'Segoe UI', system-ui, -apple-system, Roboto, 'Helvetica Neue', Arial, sans-serif;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  color:var(--ink);
  background:var(--cream);
  line-height:1.7;
  font-size:17px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--font-serif);font-weight:600;line-height:1.2;color:var(--ink);margin:0 0 .5em}
p{margin:0 0 1em}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

.eyebrow{
  font-family:var(--font-sans);
  font-size:.78rem;letter-spacing:.16em;text-transform:uppercase;
  font-weight:600;color:var(--terra);margin-bottom:14px;display:inline-block;
}
.eyebrow.green{color:var(--green)}
.lead{font-size:1.18rem;color:var(--ink-soft);line-height:1.75}
.center{text-align:center}
.muted{color:var(--muted)}

.btn{
  display:inline-flex;align-items:center;gap:.5em;
  font-family:var(--font-sans);font-weight:600;font-size:.98rem;
  padding:13px 26px;border-radius:999px;border:1.5px solid transparent;
  cursor:pointer;transition:.2s ease;white-space:nowrap;
}
.btn-primary{background:var(--terra);color:#fff}
.btn-primary:hover{background:var(--terra-600);transform:translateY(-1px)}
.btn-dark{background:var(--green);color:#fff}
.btn-dark:hover{background:var(--green-700);transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--green);color:var(--green)}
.btn-light{background:#fff;color:var(--green);border-color:#fff}
.btn-light:hover{transform:translateY(-1px)}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(251,247,239,.92);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
/* gap: bắt buộc có khoảng hở giữa logo · menu · nút, kẻo 3 khối dính sát nhau khi chật */
.nav{display:flex;align-items:center;justify-content:space-between;gap:24px;height:74px}
.brand{display:flex;align-items:center;gap:12px}
.brand-logo{height:44px;width:auto;display:block}
.brand-name{font-family:var(--font-serif);font-weight:600;font-size:1.22rem;line-height:1.05}
.brand-name small{display:block;font-family:var(--font-sans);font-size:.66rem;letter-spacing:.14em;
  text-transform:uppercase;color:var(--muted);font-weight:600;margin-top:2px}
.nav-links{display:flex;align-items:center;gap:12px;list-style:none;margin:0;padding:0}
.nav-links a{font-size:.88rem;font-weight:500;color:var(--ink-soft);transition:.15s;white-space:nowrap}
.nav-links a:hover,.nav-links .current-menu-item>a,.nav-links .current_page_item>a{color:var(--green)}
.nav-cta{display:flex;align-items:center;gap:14px}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:6px}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--ink);margin:5px 0;transition:.2s}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:
    radial-gradient(1200px 500px at 80% -10%, var(--gold-100), transparent 60%),
    radial-gradient(900px 500px at -10% 110%, var(--green-100), transparent 55%),
    var(--cream);
  padding:88px 0 84px;
}
.hero-inner{max-width:820px}
.hero h1{font-size:clamp(2.4rem,5.2vw,4rem);letter-spacing:-.01em;margin-bottom:.35em}
.hero h1 .accent{color:var(--terra);font-style:italic}
.hero .lead{max-width:640px;margin-bottom:32px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.hero-note{margin-top:22px;font-size:.92rem;color:var(--muted)}

.ladder{display:flex;gap:10px;flex-wrap:wrap;margin-top:40px}
.ladder .step{
  display:flex;align-items:center;gap:10px;background:rgba(255,255,255,.7);
  border:1px solid var(--line);border-radius:999px;padding:9px 18px;font-weight:600;font-size:.95rem;
}
.ladder .step b{color:var(--green)}
.ladder .arrow{color:var(--terra);font-weight:700;align-self:center}

/* ---------- Section ---------- */
.section{padding:76px 0}
.section.alt{background:var(--cream-2)}
.section.paper{background:var(--paper)}
.section-head{max-width:680px;margin-bottom:44px}
.section-head.center{margin-left:auto;margin-right:auto}
.section-head h2{font-size:clamp(1.8rem,3.6vw,2.55rem)}
.section-head p{color:var(--ink-soft);font-size:1.1rem;margin:0}

.grid{display:grid;gap:26px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}

.pillar{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:32px 28px;box-shadow:var(--shadow-sm);transition:.2s;
}
.pillar:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.pillar .ico{
  width:52px;height:52px;border-radius:14px;display:grid;place-items:center;margin-bottom:18px;
  background:var(--green-100);color:var(--green);
}
.pillar .ico svg{width:26px;height:26px}
.pillar h3{font-size:1.35rem;margin-bottom:.35em}
.pillar .n{font-family:var(--font-serif);font-size:.9rem;color:var(--muted)}
.pillar p{color:var(--ink-soft);margin:0;font-size:1rem}

/* ---------- Thẻ bài viết ---------- */
.post-card{
  display:flex;flex-direction:column;background:var(--paper);
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow-sm);transition:.2s;height:100%;
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.post-cover{
  height:172px;position:relative;overflow:hidden;border-bottom:1px solid var(--line);
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  padding:22px 20px;
  background:linear-gradient(160deg, #F4F1EA 0%, #ECE8DD 100%);
}
.post-cover img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.post-cover span{
  position:relative;z-index:1;display:block;text-align:center;max-width:92%;
  font-family:var(--font-serif);font-style:italic;font-weight:500;
  font-size:1.55rem;line-height:1.18;color:var(--ink-soft);opacity:.9;
}
.post-cover span::after{
  content:"";display:block;width:44px;height:1px;margin:12px auto 0;
  background:var(--accent);opacity:.4;
}
.post-body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1}
.tag{
  align-self:flex-start;font-size:.68rem;font-weight:600;letter-spacing:.16em;text-transform:uppercase;
  padding:0;background:none;color:var(--accent);margin-bottom:12px;
}
.post-body h3{font-size:1.28rem;margin-bottom:.5em;line-height:1.3}
.post-body h3 a:hover{color:var(--terra)}
.post-body p{font-size:.98rem;color:var(--ink-soft);margin-bottom:18px}
.post-meta{margin-top:auto;display:flex;align-items:center;gap:12px;font-size:.85rem;color:var(--muted)}
.post-meta .read-more{margin-left:auto;color:var(--terra);font-weight:600}

/* ---------- Trích dẫn ---------- */
.quote-band{background:#274E13;color:#F6F5F0;padding:82px 0}
.quote-band .container{max-width:820px;text-align:center}
.quote-mark{font-family:var(--font-serif);font-size:3.4rem;line-height:.4;color:#D9B877;opacity:.55;margin-bottom:.35em}
.quote-band blockquote{
  font-family:var(--font-serif);font-size:clamp(1.55rem,3.5vw,2.25rem);font-style:italic;
  line-height:1.5;margin:0 0 .6em;color:#F6F5F0;
}
.quote-band cite{color:#D9B877;font-style:normal;font-weight:600;font-size:.9rem;letter-spacing:.06em;font-family:var(--font-sans);text-transform:uppercase}

/* ---------- Thẻ testimonial (social proof) ---------- */
.proof .section-head{margin-bottom:34px}
.proof-grid{display:flex;flex-wrap:wrap;justify-content:center;gap:26px}
.proof-grid .quote-card{flex:0 1 calc(33.333% - 18px)}
@media(max-width:900px){.proof-grid .quote-card{flex:0 1 calc(50% - 13px)}}
@media(max-width:720px){.proof-grid .quote-card{flex:1 1 100%}}

/* ---------- Lộ trình dọc (trang Chương trình) ---------- */
.journey{max-width:760px;margin:0 auto}
.journey-rail{position:relative;padding-left:66px;margin-top:44px}
.journey-spine{position:absolute;left:22px;top:20px;bottom:30px;width:2px;background:#CBD6B7}
.jstep{position:relative;margin-bottom:28px}
.jnode{position:absolute;left:-66px;top:2px;width:44px;height:44px;border-radius:50%;background:var(--accent);color:#fff;
  font-family:var(--font-serif);font-size:1.3rem;display:grid;place-items:center;box-shadow:var(--shadow-sm)}
.jcard{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-lg);padding:26px 28px;box-shadow:var(--shadow-sm)}
.jcard.flag{border:2px solid var(--accent)}
.jlabel{font-size:.8rem;letter-spacing:.15em;text-transform:uppercase;color:var(--accent);font-weight:600}
.jhook{font-family:var(--font-serif);font-style:italic;font-size:1.15rem;color:var(--ink-soft);line-height:1.45;margin:10px 0 12px}
.jname{font-size:1.5rem;margin:0 0 .4em}
.jbody{color:var(--ink-soft);font-size:1rem;line-height:1.7;margin:0 0 20px}
.jbadge{display:inline-block;font-size:.68rem;letter-spacing:.08em;text-transform:uppercase;font-weight:700;color:#fff;
  background:var(--accent);border-radius:999px;padding:4px 12px;margin-bottom:10px}
@media(max-width:600px){.journey-rail{padding-left:54px}.jnode{left:-54px;width:38px;height:38px;font-size:1.1rem}}
.quote-card{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:28px 26px;box-shadow:var(--shadow-sm);margin:0;display:flex;flex-direction:column;height:100%;
}
.quote-card blockquote{
  font-family:var(--font-serif);font-style:italic;font-size:1.12rem;line-height:1.5;
  color:var(--ink);margin:0 0 18px;
}
.quote-card blockquote::before{
  content:"\201C";color:var(--accent);font-family:var(--font-serif);
  font-size:2.4rem;line-height:0;vertical-align:-.35em;margin-right:.06em;
}
.quote-card figcaption{margin-top:auto;font-weight:600;font-size:.86rem;color:var(--accent);letter-spacing:.01em}
.tm-person{display:flex;align-items:center;gap:12px;margin-top:auto}
.tm-avatar{width:52px;height:52px;border-radius:50%;object-fit:cover;flex:0 0 auto;
  border:2px solid var(--accent-100);background:#fff}
.tm-name{font-family:var(--font-sans);font-weight:600;font-size:.92rem;color:var(--ink);line-height:1.15}
.tm-name small{display:block;font-weight:500;font-size:.78rem;color:var(--muted);margin-top:2px}

/* ---------- Giới thiệu ngang ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.portrait{
  aspect-ratio:4/5;border-radius:var(--radius-lg);overflow:hidden;position:relative;
  background:linear-gradient(150deg,#33553F,#243A2E);display:grid;place-items:center;
  box-shadow:var(--shadow-md);
}
.portrait img{width:100%;height:100%;object-fit:cover;object-position:center 12%}

/* ---------- Sản phẩm ---------- */
.product{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:34px;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;height:100%;
}
.product.flagship{border:2px solid var(--green);position:relative}
.product .badge{
  position:absolute;top:-13px;left:34px;background:var(--terra);color:#fff;
  font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;
  padding:5px 14px;border-radius:999px;
}
.product h3{font-size:1.5rem;margin-bottom:.2em}
.product .kicker{font-size:.85rem;font-weight:600;letter-spacing:.05em;text-transform:uppercase;color:var(--terra);margin-bottom:12px}
.product .price{font-family:var(--font-serif);font-size:1.9rem;color:var(--green);margin:14px 0 4px}
.product .price small{font-size:.9rem;color:var(--muted);font-weight:400;font-family:var(--font-sans)}
.product .btn{margin-top:auto}

/* ---------- Bài viết (article) ---------- */
.article{padding:56px 0 40px;background:var(--paper)}
.article-head{max-width:720px;margin:0 auto 40px;text-align:center}
.article-head h1{font-size:clamp(2rem,4.4vw,3rem);margin:.2em 0 .4em}
.byline{display:flex;align-items:center;justify-content:center;gap:14px;color:var(--muted);font-size:.92rem;flex-wrap:wrap}
.byline .avatar{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--green),var(--green-700));
  color:#fff;display:grid;place-items:center;font-family:var(--font-serif);font-weight:700}
.article-feat{max-width:920px;margin:0 auto 40px;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-md)}
.prose{max-width:680px;margin:0 auto;font-size:1.15rem;line-height:1.85;color:#332F28}
.prose p{margin-bottom:1.35em}
.prose em{color:var(--terra-600)}
.prose h2{font-size:1.7rem;margin:1.4em 0 .5em}
.prose h3{font-size:1.35rem;margin:1.3em 0 .5em}
.prose ul,.prose ol{margin:0 0 1.35em;padding-left:1.3em}
.prose li{margin-bottom:.5em}
.prose img{border-radius:var(--radius);margin:1.4em auto}
.prose blockquote{border-left:3px solid var(--accent);margin:1.5em 0;padding:.2em 0 .2em 1.2em;
  font-family:var(--font-serif);font-style:italic;font-size:1.25rem;color:var(--ink)}
.prose a{color:var(--accent);text-decoration:underline;text-underline-offset:3px}
.article-cta{max-width:680px;margin:48px auto 0;background:var(--cream-2);border:1px solid var(--line);
  border-radius:var(--radius-lg);padding:34px;text-align:center}

/* ---------- Newsletter band ---------- */
.subscribe{background:linear-gradient(135deg,var(--green),var(--green-700));color:#fff;padding:74px 0}
.subscribe .container{max-width:720px;text-align:center}
.subscribe h2{color:#fff}
.subscribe p{color:rgba(255,255,255,.85)}
.sub-form{display:flex;gap:12px;max-width:480px;margin:26px auto 0}
.sub-form input{flex:1;border:0;border-radius:999px;padding:14px 22px;font-family:var(--font-sans);font-size:1rem}

/* ---------- Page hero ---------- */
.page-hero{background:var(--cream-2);padding:64px 0 56px;border-bottom:1px solid var(--line)}
.page-hero h1{font-size:clamp(2rem,4.6vw,3.1rem);max-width:840px}
.page-hero p{font-size:1.15rem;color:var(--ink-soft);max-width:680px;margin:0}
.page-hero p+p{margin-top:.5em}
.page-hero p strong{color:var(--ink);font-weight:600}

/* ---------- Phân trang ---------- */
.pagination{display:flex;gap:8px;justify-content:center;margin-top:48px;flex-wrap:wrap}
.pagination .page-numbers{display:inline-grid;place-items:center;min-width:42px;height:42px;padding:0 12px;
  border:1.5px solid var(--line);border-radius:999px;background:#fff;color:var(--ink-soft);font-weight:600}
.pagination .page-numbers.current{background:var(--green);border-color:var(--green);color:#fff}
.pagination a.page-numbers:hover{border-color:var(--green);color:var(--green)}

/* ---------- Footer ---------- */
.site-footer{background:#1C3A0E;color:#CBD3BE;padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.site-footer h4{color:#fff;font-family:var(--font-sans);font-size:.82rem;letter-spacing:.12em;
  text-transform:uppercase;margin-bottom:16px}
.site-footer a{color:#CBD3BE;font-size:.96rem;display:block;margin-bottom:10px;transition:.15s}
.site-footer a:hover{color:#fff}
.footer-logo{height:54px;width:auto;margin-bottom:10px}
.footer-brand p{font-size:.98rem;max-width:280px;color:#A9B29A}
.footer-col ul{list-style:none;margin:0;padding:0}
.footer-bottom{border-top:1px solid #35531C;padding-top:22px;display:flex;justify-content:space-between;
  flex-wrap:wrap;gap:10px;font-size:.86rem;color:#94A182}

/* ---------- WP tiện ích ---------- */
.screen-reader-text{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(1px,1px,1px,1px)}
.alignwide{max-width:1000px}
.alignfull{max-width:100%}
.wp-caption{max-width:100%}
.wp-caption-text{font-size:.88rem;color:var(--muted);text-align:center;margin-top:6px}
.sticky,.gallery-caption{display:block}
.admin-bar .site-header{top:32px}
@media(max-width:782px){.admin-bar .site-header{top:46px}}

/* ---------- Responsive ---------- */
@media(max-width:900px){
  .grid-3{grid-template-columns:1fr 1fr}
  .grid-4{grid-template-columns:1fr 1fr}
  .split{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr}
}
/* 1180px: dưới mức này menu ngang không còn đủ chỗ → chuyển sang nút ba gạch,
   thay vì để chữ đè lên nhau */
@media(max-width:1180px){
  .nav-links{
    position:absolute;top:74px;left:0;right:0;background:var(--cream);
    flex-direction:column;gap:0;padding:8px 0;border-bottom:1px solid var(--line);
    box-shadow:var(--shadow-md);display:none;
  }
  .nav-links.open{display:flex}
  .nav-links li{width:100%}
  .nav-links a{display:block;padding:14px 24px;font-size:1rem}
  .nav-toggle{display:block}
}
/* Nút "Bản tin" chỉ ẩn khi thật sự hết chỗ (điện thoại), KHÔNG ẩn cùng lúc với menu —
   máy tính xách tay màn hẹp vẫn phải thấy lối đăng ký bản tin */
@media(max-width:480px){
  .nav-cta .btn:not(.nav-toggle){display:none}
}
@media(max-width:720px){
  .grid-3,.grid-2,.grid-4{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .sub-form{flex-direction:column}
  .section{padding:56px 0}
  .hero{padding:60px 0}
}
@media(max-width:480px){
  .footer-grid{grid-template-columns:1fr}
}