/*
Theme Name: Phuong Da Quy
Theme URI: https://www.phuongdaquy.com
Author: Phượng Đá Quý
Author URI: https://trangsucgnj.vn
Description: Theme blog đá quý – phong thủy tiếng Việt theo mô hình Learning Center của International Gem Society, tông màu học thuật đúng bảng màu thật của GIA.edu (trích từ CSS thực tế trang gia.edu/emerald): nền trắng, chữ đen #202020, đỏ nhấn #DE111E, xanh link #0477AA, gold đồng #825E30, nền tối #2C2C2C ở footer. Kiến trúc pillar + cluster, cặp nút "Học ↔ Mua" dẫn về trangsucgnj.vn.
Version: 1.0.0
Requires at least: 6.0
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: phuongdaquy
*/

/* ==========================================================
   1. BIẾN MÀU & NỀN TẢNG (blueprint Phần 3)
   ========================================================== */
:root {
  --pdq-primary: #202020;      /* ink GIA — tiêu đề, chữ đậm (KHÔNG dùng làm nền header nữa) */
  --pdq-primary-soft: #3A3A3A; /* dark-soft — submenu mobile, gradient phụ */
  --pdq-dark: #2C2C2C;         /* nền tối thật của GIA — footer, hero, section tối */
  --pdq-accent: #825E30;       /* gold đồng GIA — nút CTA, viền, điểm nhấn trên nền sáng */
  --pdq-accent-light: #A7947A; /* tan nhạt — điểm nhấn trên nền tối */
  --pdq-accent-dark: #5E4322;
  --pdq-red: #DE111E;          /* đỏ nhấn GIA — hover menu, eyebrow, callout */
  --pdq-link: #0477AA;         /* xanh link GIA — link trong nội dung */
  --pdq-link-hover: #035D88;
  --pdq-bg: #FFFFFF;
  --pdq-bg-soft: #FAFAFA;
  --pdq-bg-alt: #F1F1F1;       /* nền phụ xen kẽ section (kiểu GIA info-box) */
  --pdq-text: #202020;
  --pdq-muted: #666666;
  --pdq-line: #D8D8D8;
  --pdq-serif: "Playfair Display", "Lora", "Noto Serif", Georgia, serif;
  --pdq-sans: "Be Vietnam Pro", "Inter", "Noto Sans", -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  --pdq-radius: 10px;
  --pdq-shadow: 0 6px 24px rgba(0, 0, 0, .12);
  --pdq-maxw: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--pdq-sans);
  font-size: 17.5px;           /* blueprint: body ≥ 17–18px */
  line-height: 1.7;            /* blueprint: line-height 1.7 */
  color: var(--pdq-text);
  background: var(--pdq-bg);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--pdq-serif);
  color: var(--pdq-primary);
  line-height: 1.3;
  margin: 1.4em 0 .5em;
}
h1 { font-size: 2.35rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.3rem; }
p { margin: 0 0 1.1em; }

a { color: var(--pdq-link); text-decoration-color: var(--pdq-link); text-underline-offset: 3px; }
a:hover { color: var(--pdq-link-hover); }

img { max-width: 100%; height: auto; border-radius: var(--pdq-radius); }

.pdq-container { max-width: var(--pdq-maxw); margin: 0 auto; padding: 0 22px; }

/* ==========================================================
   2. NÚT & CTA — cặp nút song song "Học ↔ Mua" (blueprint 5.3)
   ========================================================== */
.btn, .wp-block-button__link {
  display: inline-block;
  padding: 13px 26px;
  border-radius: 999px;
  font-weight: 700;
  font-size: .95rem;
  letter-spacing: .3px;
  text-decoration: none;
  text-transform: uppercase;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
  cursor: pointer;
  border: 2px solid transparent;
  line-height: 1.3;
}
.btn:hover { transform: translateY(-2px); box-shadow: var(--pdq-shadow); }

/* Nút MUA — vàng gold */
.btn-shop {
  background: linear-gradient(135deg, var(--pdq-accent), var(--pdq-accent-dark));
  color: #fff !important;
}
/* Nút HỌC — viền tím, giữ người đọc trong hệ nội dung */
.btn-learn {
  background: transparent;
  border-color: var(--pdq-primary);
  color: var(--pdq-primary) !important;
}
.btn-learn:hover { background: var(--pdq-primary); color: #fff !important; }

.btn-row { display: flex; flex-wrap: wrap; gap: 12px; margin: 18px 0 6px; }
.btn-note { font-size: .85rem; color: var(--pdq-muted); margin-top: 6px; }

/* ==========================================================
   3. HEADER + MEGA MENU (blueprint 2.1)
   ========================================================== */
.site-header {
  background: var(--pdq-bg);
  color: var(--pdq-primary);
  position: sticky;
  top: 0;
  z-index: 999;
  border-bottom: 1px solid var(--pdq-line);
  box-shadow: 0 1px 4px rgba(0,0,0,.05);
}
.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 22px;
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 68px;
}
.site-logo { flex: 0 0 auto; text-decoration: none; }
.site-logo .logo-name {
  font-family: var(--pdq-serif);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--pdq-primary);
  display: block;
  line-height: 1.1;
}
.site-logo .logo-name em { color: var(--pdq-accent); font-style: normal; }
.site-logo .logo-tag { font-size: .68rem; color: var(--pdq-muted); letter-spacing: .8px; text-transform: uppercase; }

.main-nav { flex: 1 1 auto; min-width: 0; }
.main-nav > ul { list-style: none; margin: 0; padding: 0; display: flex; justify-content: center; }
.main-nav > ul > li { position: relative; }
.main-nav > ul > li > a {
  display: block;
  padding: 22px 10px;
  color: var(--pdq-primary);
  text-decoration: none;
  font-size: .85rem;
  font-weight: 600;
  white-space: nowrap;
}
.main-nav > ul > li > a:hover { color: var(--pdq-red); }

/* dropdown với micro-description (điểm mấu chốt của IGS) */
.main-nav .sub {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 320px;
  background: #fff;
  border-radius: 0 0 var(--pdq-radius) var(--pdq-radius);
  box-shadow: var(--pdq-shadow);
  padding: 10px 0;
  list-style: none;
  margin: 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all .18s ease;
}
.main-nav li:hover > .sub,
.main-nav li:focus-within > .sub { opacity: 1; visibility: visible; transform: translateY(0); }
.main-nav .sub a { display: block; padding: 10px 20px; text-decoration: none; }
.main-nav .sub a:hover { background: var(--pdq-bg-alt); }
.main-nav .sub .item-name { display: block; font-weight: 700; color: var(--pdq-primary); font-size: .95rem; }
.main-nav .sub .item-desc { display: block; font-size: .8rem; color: var(--pdq-muted); line-height: 1.45; }

.header-cta { flex: 0 0 auto; display: flex; align-items: center; gap: 8px; }
.header-cta .btn { padding: 10px 16px; font-size: .74rem; white-space: nowrap; }
.search-toggle {
  background: none; border: none; color: var(--pdq-primary); font-size: 1.1rem; cursor: pointer; padding: 8px;
}
.header-search { display: none; background: var(--pdq-bg-alt); border-top: 1px solid var(--pdq-line); padding: 12px 0; }
.header-search.open { display: block; }
.header-search form { max-width: 640px; margin: 0 auto; display: flex; gap: 8px; padding: 0 22px; }
.header-search input[type="search"] {
  flex: 1; padding: 11px 16px; border-radius: 999px; border: 1px solid var(--pdq-line); font-size: 1rem; font-family: var(--pdq-sans);
}
.header-search button { border: none; }

.nav-toggle { display: none; background: none; border: none; color: var(--pdq-primary); font-size: 1.5rem; cursor: pointer; }

/* ==========================================================
   4. HERO (blueprint 2.2)
   ========================================================== */
.hero {
  background:
    radial-gradient(1100px 500px at 80% -10%, rgba(130,94,48,.25), transparent 60%),
    radial-gradient(900px 480px at 10% 110%, rgba(4,119,170,.30), transparent 55%),
    linear-gradient(150deg, var(--pdq-dark) 0%, #141414 100%);
  color: #fff;
  padding: 84px 0 72px;
  text-align: center;
}
.hero h1 {
  color: #fff;
  font-size: clamp(1.9rem, 4.2vw, 3rem);
  max-width: 820px;
  margin: 0 auto .5em;
}
.hero h1 em { color: var(--pdq-accent-light); font-style: normal; }
.hero .hero-sub { max-width: 640px; margin: 0 auto 1.6em; color: rgba(255,255,255,.85); font-size: 1.08rem; }
.hero .btn-row { justify-content: center; }

.hero-optin {
  margin: 34px auto 0;
  max-width: 560px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.18);
  border-radius: var(--pdq-radius);
  padding: 22px 24px;
}
.hero-optin strong { color: var(--pdq-red); }
.hero-optin form { display: flex; gap: 10px; margin-top: 12px; flex-wrap: wrap; }
.hero-optin input[type="email"] {
  flex: 1 1 220px; padding: 12px 16px; border-radius: 999px; border: none; font-size: 1rem; font-family: var(--pdq-sans);
}

/* ==========================================================
   5. CÁC KHỐI TRANG CHỦ (blueprint 2.3)
   ========================================================== */
.section { padding: 64px 0; }
.section-alt { background: var(--pdq-bg-alt); }
.section-soft { background: var(--pdq-bg-soft); }
.section-dark { background: var(--pdq-dark); color: #fff; }
.section-dark h2, .section-dark h3 { color: #fff; }
.section-title { text-align: center; margin-top: 0; }
.section-lead { text-align: center; max-width: 680px; margin: 0 auto 40px; color: var(--pdq-muted); }
.section-dark .section-lead { color: rgba(255,255,255,.8); }

.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 24px; }
.card {
  background: #fff;
  border: 1px solid var(--pdq-line);
  border-radius: var(--pdq-radius);
  padding: 28px;
  box-shadow: 0 2px 10px rgba(0,0,0,.06);
  transition: transform .15s ease, box-shadow .15s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--pdq-shadow); }
.card h3 { margin-top: 0; }
.card .card-icon { font-size: 1.9rem; display: block; margin-bottom: 10px; }
.card a.card-link { font-weight: 700; text-decoration: none; color: var(--pdq-accent-dark); }

/* dải số liệu uy tín */
.stats-strip { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 20px; text-align: center; }
.stat .stat-num { font-family: var(--pdq-serif); font-size: 2.3rem; font-weight: 700; color: var(--pdq-accent-light); display: block; }
.stat .stat-label { color: inherit; opacity: .85; font-size: .95rem; }

/* testimonial */
.testimonials { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.testimonial {
  background: #fff; border-left: 4px solid var(--pdq-accent); border-radius: var(--pdq-radius);
  padding: 24px; font-style: italic; color: var(--pdq-text);
  box-shadow: 0 2px 10px rgba(0,0,0,.06);
}
.testimonial cite { display: block; margin-top: 12px; font-style: normal; font-weight: 700; color: var(--pdq-primary); font-size: .9rem; }

/* khối tra đá theo mệnh */
.menh-chips { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin: 24px 0; }
.menh-chip {
  padding: 12px 26px; border-radius: 999px; font-weight: 700; text-decoration: none; color: #fff !important;
  box-shadow: 0 2px 8px rgba(0,0,0,.18); transition: transform .15s ease;
}
.menh-chip:hover { transform: translateY(-3px); }
.menh-kim  { background: linear-gradient(135deg, #9FA6B2, #6E7480); }
.menh-moc  { background: linear-gradient(135deg, #3E8E5A, #2A6B41); }
.menh-thuy { background: linear-gradient(135deg, #2A5EA8, #173E75); }
.menh-hoa  { background: linear-gradient(135deg, #C0392B, #8E2418); }
.menh-tho  { background: linear-gradient(135deg, #B98A2F, #8A651E); }

/* bài viết nổi bật */
.post-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 24px; }
.post-card { background: #fff; border: 1px solid var(--pdq-line); border-radius: var(--pdq-radius); overflow: hidden; display: flex; flex-direction: column; }
.post-card .thumb { aspect-ratio: 16/10; background: linear-gradient(135deg, var(--pdq-primary-soft), var(--pdq-dark)); display: block; }
.post-card .thumb img { width: 100%; height: 100%; object-fit: cover; border-radius: 0; }
.post-card .post-body { padding: 20px 22px 24px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.post-card h3 { margin: 0; font-size: 1.08rem; }
.post-card h3 a { text-decoration: none; }
.post-card .excerpt { color: var(--pdq-muted); font-size: .92rem; flex: 1; }
.post-card .read-more { font-weight: 700; font-size: .85rem; text-transform: uppercase; letter-spacing: .5px; color: var(--pdq-accent-dark); text-decoration: none; }

/* FAQ */
.faq details {
  background: #fff; border: 1px solid var(--pdq-line); border-radius: var(--pdq-radius);
  padding: 4px 22px; margin-bottom: 12px;
}
.faq summary { font-weight: 700; color: var(--pdq-primary); cursor: pointer; padding: 12px 0; font-size: 1.02rem; }

/* ==========================================================
   6. TRANG PILLAR & KHỐI CON (blueprint Phần 5)
   ========================================================== */
.page-hero {
  background: linear-gradient(140deg, var(--pdq-dark), #141414);
  color: #fff; padding: 52px 0 42px; text-align: center;
}
.page-hero h1 { color: #fff; margin: 0 0 .3em; }
.page-hero .breadcrumb { font-size: .78rem; text-transform: uppercase; letter-spacing: .8px; color: rgba(255,255,255,.6); }
.page-hero .breadcrumb a { color: rgba(255,255,255,.9); }

.entry-content { max-width: 860px; margin: 0 auto; padding: 44px 22px 60px; }
.entry-content > h2 { border-bottom: 2px solid var(--pdq-line); padding-bottom: .3em; }

/* answer box — đoạn mở bài chiếm featured snippet */
.answer-box {
  background: var(--pdq-bg-alt);
  border-left: 4px solid var(--pdq-accent);
  border-radius: var(--pdq-radius);
  padding: 20px 24px;
  font-size: 1.05rem;
  margin-bottom: 20px;
}

/* dòng công bố liên kết bán hàng */
.disclosure {
  font-size: .84rem; color: var(--pdq-muted); border: 1px dashed var(--pdq-line);
  border-radius: var(--pdq-radius); padding: 10px 16px; margin-bottom: 26px;
}

/* sticky quick-nav trong pillar */
.toc-sticky {
  position: sticky; top: 68px; z-index: 90;
  background: rgba(255,255,255,.96); backdrop-filter: blur(6px);
  border: 1px solid var(--pdq-line); border-radius: 999px;
  padding: 10px 18px; margin: 26px 0;
  display: flex; flex-wrap: wrap; gap: 6px 18px; justify-content: center;
}
.toc-sticky a { font-weight: 700; font-size: .88rem; text-decoration: none; text-transform: uppercase; letter-spacing: .5px; color: var(--pdq-primary); }
.toc-sticky a:hover { color: var(--pdq-red); }

/* khuôn khối con lặp lại (blueprint 5.3) */
.gem-block {
  background: #fff; border: 1px solid var(--pdq-line); border-radius: var(--pdq-radius);
  padding: 30px 32px; margin: 30px 0; box-shadow: 0 2px 10px rgba(0,0,0,.06);
}
.gem-block h2 { margin-top: 0; border-bottom: none; }
.gem-block h2 .menh-badge {
  display: inline-block; font-family: var(--pdq-sans); font-size: .72rem; font-weight: 700;
  vertical-align: middle; margin-left: 10px; padding: 4px 12px; border-radius: 999px; color: #fff; letter-spacing: 1px;
}
.gem-block h3 { color: var(--pdq-accent-dark); margin-top: .8em; }
.gem-block ul { padding-left: 1.2em; }
.gem-block ul li { margin-bottom: .4em; }
.shop-links a { font-weight: 600; }

/* bảng */
.entry-content table, .pdq-table {
  width: 100%; border-collapse: collapse; margin: 22px 0; font-size: .95rem; background: #fff;
}
.entry-content th, .pdq-table th {
  background: var(--pdq-dark); color: #fff; text-align: left; padding: 11px 14px; font-weight: 700;
}
.entry-content td, .pdq-table td { border: 1px solid var(--pdq-line); padding: 10px 14px; vertical-align: top; }
.entry-content tr:nth-child(even) td { background: var(--pdq-bg-soft); }
.table-wrap { overflow-x: auto; }

/* ==========================================================
   7. BLOG LIST & SINGLE
   ========================================================== */
.archive-grid { max-width: var(--pdq-maxw); margin: 0 auto; padding: 44px 22px 60px; }
.single-meta { color: var(--pdq-muted); font-size: .88rem; margin-bottom: 24px; }
.latest-articles { border-top: 1px solid var(--pdq-line); padding-top: 34px; margin-top: 44px; }

/* ==========================================================
   8. FOOTER (blueprint 2.4)
   ========================================================== */
.site-footer { background: var(--pdq-dark); color: rgba(255,255,255,.82); margin-top: 60px; }
.footer-cols {
  max-width: var(--pdq-maxw); margin: 0 auto; padding: 54px 22px 34px;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 34px;
}
.site-footer h4 { color: var(--pdq-accent-light); font-family: var(--pdq-sans); font-size: .85rem; text-transform: uppercase; letter-spacing: 1.2px; margin: 0 0 14px; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: 9px; font-size: .92rem; }
.site-footer a { color: rgba(255,255,255,.82); text-decoration: none; }
.site-footer a:hover { color: var(--pdq-accent-light); }
.footer-about .brand { font-family: var(--pdq-serif); font-size: 1.2rem; color: #fff; display: block; margin-bottom: 10px; }
.footer-social { display: flex; gap: 12px; margin-top: 14px; }
.footer-social a {
  width: 36px; height: 36px; border-radius: 50%; border: 1px solid rgba(255,255,255,.3);
  display: flex; align-items: center; justify-content: center; font-size: .8rem; font-weight: 700;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.14);
  padding: 18px 22px; text-align: center; font-size: .82rem; color: rgba(255,255,255,.55);
}
.footer-bottom a { color: rgba(255,255,255,.7); }

/* ==========================================================
   9. RESPONSIVE
   ========================================================== */
@media (max-width: 980px) {
  .nav-toggle { display: block; }
  .main-nav {
    display: none; position: absolute; top: 68px; left: 0; right: 0;
    background: var(--pdq-dark); padding: 10px 0 20px; max-height: calc(100vh - 68px); overflow-y: auto;
  }
  .main-nav.open { display: block; }
  .main-nav > ul { flex-direction: column; }
  .main-nav > ul > li > a { padding: 13px 26px; color: #fff; }
  .main-nav > ul > li > a:hover { color: var(--pdq-red); }
  .main-nav .sub {
    position: static; opacity: 1; visibility: visible; transform: none;
    background: var(--pdq-primary-soft); border-radius: 0; box-shadow: none; min-width: 0;
  }
  .main-nav .sub .item-name { color: #fff; }
  .main-nav .sub .item-desc { color: rgba(255,255,255,.6); }
  .header-cta .btn { display: none; }
  .toc-sticky { position: static; }
  .gem-block { padding: 22px 20px; }
}