/*
Theme Name: Avenger Hub
Theme URI: https://avengerhub.com
Author: Avenger Hub
Description: Theme tùy chỉnh cho Avenger Hub — nền tảng học AI ứng dụng kinh doanh cho SME Việt Nam. Xây theo Design System Navy/Xanh dương (docs/design/ux-ui-design-website.md), Component Library (docs/design/component-library.md), Page Specs (docs/design/page-specs.md).
Version: 1.0.0
Requires at least: 6.0
Requires PHP: 8.0
Text Domain: avengerhub
*/

/* ============ FONTS (self-hosted, xem lý do đổi Poppins -> Be Vietnam Pro ở functions.php) ============ */
@font-face {
  font-family: 'Be Vietnam Pro';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('assets/fonts/be-vietnam-pro-600-vietnamese.woff2') format('woff2');
  unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}
@font-face {
  font-family: 'Be Vietnam Pro';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('assets/fonts/be-vietnam-pro-600-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122;
}
@font-face {
  font-family: 'Be Vietnam Pro';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('assets/fonts/be-vietnam-pro-700-vietnamese.woff2') format('woff2');
  unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}
@font-face {
  font-family: 'Be Vietnam Pro';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('assets/fonts/be-vietnam-pro-700-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122;
}
@font-face {
  font-family: 'Open Sans';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('assets/fonts/open-sans-400-vietnamese.woff2') format('woff2');
  unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}
@font-face {
  font-family: 'Open Sans';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('assets/fonts/open-sans-400-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122;
}
@font-face {
  font-family: 'Open Sans';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('assets/fonts/open-sans-600-vietnamese.woff2') format('woff2');
  unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}
@font-face {
  font-family: 'Open Sans';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('assets/fonts/open-sans-600-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122;
}
@font-face {
  font-family: 'Open Sans';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('assets/fonts/open-sans-700-vietnamese.woff2') format('woff2');
  unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}
@font-face {
  font-family: 'Open Sans';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('assets/fonts/open-sans-700-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122;
}

/* ============ DESIGN TOKENS (docs/design/ux-ui-design-website.md mục 1) ============ */
:root {
  --color-primary: #0F172A;
  --color-accent: #0369A1;
  --color-bg: #F8FAFC;
  --color-card: #FFFFFF;
  --color-text: #020617;
  --color-muted: #64748B;
  --color-border: #E2E8F0;
  --color-danger: #DC2626;

  --font-display: 'Be Vietnam Pro', 'Segoe UI', sans-serif;
  --font-body: 'Open Sans', 'Segoe UI', sans-serif;

  --space-1: 4px;  --space-2: 8px;  --space-3: 12px; --space-4: 16px;
  --space-5: 24px; --space-6: 32px; --space-7: 48px; --space-8: 64px;

  --radius: 6px;
  --shadow-card: 0 1px 3px rgba(2,6,23,0.08);
  --shadow-card-hover: 0 4px 12px rgba(2,6,23,0.10);
  --container-max: 1200px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-primary: #E2E8F0;
    --color-accent: #38BDF8;
    --color-bg: #0B1220;
    --color-card: #151E2E;
    --color-text: #F1F5F9;
    --color-muted: #94A3B8;
    --color-border: #243044;
  }
}

/* ============ RESET & BASE ============ */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent); }
h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--color-primary);
  line-height: 1.2;
  text-wrap: balance;
  margin: 0 0 var(--space-3);
}
h1 { font-size: 40px; font-weight: 700; }
h2 { font-size: 24px; font-weight: 600; }
h3 { font-size: 18px; font-weight: 600; }
p { margin: 0 0 var(--space-4); max-width: 70ch; }
.tabular-nums { font-variant-numeric: tabular-nums; }

.ah-container { max-width: var(--container-max); margin: 0 auto; padding: 0 var(--space-4); }
.ah-section { padding: var(--space-8) 0; }
@media (max-width: 767px) { .ah-section { padding: var(--space-7) 0; } h1 { font-size: 28px; } }

/* ============ A. ATOMS ============ */
.ah-btn {
  display: inline-flex; align-items: center; justify-content: center;
  height: 44px; padding: 0 var(--space-5);
  border-radius: var(--radius); font-family: var(--font-body); font-size: 16px; font-weight: 600;
  cursor: pointer; text-decoration: none; border: none;
  transition: background-color 150ms ease, transform 100ms ease;
}
.ah-btn:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
.ah-btn--primary { background: var(--color-accent); color: #fff; }
.ah-btn--primary:hover { background: #0284C7; color: #fff; }
.ah-btn--primary:active { transform: scale(0.98); }
.ah-btn--secondary { background: transparent; color: var(--color-primary); border: 1px solid var(--color-primary); }
.ah-btn--secondary:hover { background: var(--color-primary); color: #fff; }
.ah-btn[disabled] { opacity: 0.5; pointer-events: none; }

.ah-badge {
  display: inline-block; padding: 4px 10px; border-radius: 999px;
  font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.03em;
}
.ah-badge--accent { background: var(--color-accent); color: #fff; }
.ah-badge--new { background: rgba(15,23,42,0.1); color: var(--color-primary); }
.ah-badge--tag { border: 1px solid var(--color-border); color: var(--color-muted); }

.ah-avatar { border-radius: 50%; object-fit: cover; }
.ah-avatar--sm { width: 40px; height: 40px; }
.ah-avatar--lg { width: 64px; height: 64px; }

/* ============ B/C. CARDS, HEADER, FOOTER, HERO, ACCORDION ============ */
.ah-card {
  background: var(--color-card); border: 1px solid var(--color-border); border-radius: var(--radius);
  box-shadow: var(--shadow-card); padding: var(--space-5);
  transition: box-shadow 150ms ease, transform 150ms ease;
}
.ah-card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); }
.ah-card__icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; border-radius: var(--radius);
  background: rgba(3,105,161,0.1); color: var(--color-accent); margin-bottom: var(--space-3);
}
.ah-grid { display: grid; gap: var(--space-5); grid-template-columns: 1fr; justify-content: center; }
@media (min-width: 768px) { .ah-grid--2 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .ah-grid--3 { grid-template-columns: repeat(3, 1fr); } .ah-grid--2 { grid-template-columns: repeat(2, 1fr); } }
/* Khi số lượng item ít hơn số cột, không kéo giãn card full-width mà giữ kích thước card chuẩn, căn giữa */
.ah-grid--auto { display: flex; flex-wrap: wrap; gap: var(--space-5); justify-content: flex-start; }
.ah-grid--auto .ah-card { flex: 1 1 320px; max-width: 380px; }
@media (max-width: 767px) { .ah-grid--auto .ah-card { flex-basis: 100%; max-width: none; } }

/* Đã bỏ hiệu ứng scroll-reveal (opacity ẩn chờ cuộn tới). Lý do: test thực tế cho thấy
   Googlebot/crawler và cả full-page screenshot không đảm bảo bắn sự kiện scroll để
   IntersectionObserver kích hoạt — rủi ro nội dung "biến mất" với SEO là không đáng
   đánh đổi lấy 1 hiệu ứng phụ, đặc biệt khi SEO là kênh tăng trưởng chính của dự án. */

.ah-testimonial { display: flex; gap: var(--space-3); align-items: flex-start; }
.ah-testimonial blockquote { margin: 0; font-size: 18px; font-style: normal; }
.ah-testimonial cite { display: block; margin-top: var(--space-2); font-size: 13px; color: var(--color-muted); font-style: normal; }

.ah-header {
  position: sticky; top: 0; z-index: 100; background: var(--color-bg);
  border-bottom: 1px solid transparent; transition: box-shadow 150ms ease, border-color 150ms ease;
}
.ah-header.is-scrolled { box-shadow: 0 1px 3px rgba(2,6,23,0.08); border-color: var(--color-border); }
.ah-header__inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.ah-header__logo { font-family: var(--font-display); font-weight: 700; font-size: 20px; color: var(--color-primary); text-decoration: none; }
/* !important cần thiết vì CSS toàn cục của WooCommerce/LearnDash (nạp trên mọi trang) có rule
   list-style chung cho ul/li với độ ưu tiên cạnh tranh — đây là cách xử lý thực tế phổ biến
   khi theme phải "thắng" CSS plugin bên thứ 3 mà không sửa được file gốc của plugin. */
.ah-header ul.ah-nav,
.ah-mobile-menu ul {
	list-style: none !important;
	margin: 0 !important;
	padding: 0 !important;
}
.ah-nav { display: none; }
.ah-header ul.ah-nav li,
.ah-mobile-menu li {
	list-style: none !important;
	margin: 0 !important;
}
.ah-nav a { color: var(--color-text); text-decoration: none; font-weight: 600; font-size: 15px; position: relative; }
.ah-nav a:hover { color: var(--color-accent); }
@media (min-width: 1024px) { .ah-nav { display: flex; gap: var(--space-6); } }
.ah-nav-toggle { display: inline-flex; background: none; border: none; cursor: pointer; padding: var(--space-2); }
@media (min-width: 1024px) { .ah-nav-toggle { display: none; } }
.ah-mobile-menu { display: none; position: fixed; inset: 0; background: var(--color-bg); z-index: 200; padding: var(--space-5); }
.ah-mobile-menu.is-open { display: flex; flex-direction: column; gap: var(--space-5); }
.ah-mobile-menu ul { display: flex; flex-direction: column; gap: var(--space-5); }
.ah-mobile-menu li { list-style: none; }
.ah-mobile-menu a { color: var(--color-text); text-decoration: none; font-size: 20px; font-weight: 600; }

.ah-footer { border-top: 1px solid var(--color-border); padding: var(--space-7) 0 var(--space-5); margin-top: var(--space-8); }
.ah-footer__grid { display: grid; gap: var(--space-6); grid-template-columns: 1fr; }
@media (min-width: 768px) { .ah-footer__grid { grid-template-columns: repeat(3, 1fr); } }
.ah-footer small { color: var(--color-muted); font-size: 13px; }

.ah-hero { padding: var(--space-8) 0; }
.ah-hero__grid { display: grid; gap: var(--space-6); align-items: center; grid-template-columns: 1fr; }
@media (min-width: 1024px) { .ah-hero__grid { grid-template-columns: 1.1fr 0.9fr; } }
.ah-hero__eyebrow { color: var(--color-accent); font-weight: 600; font-size: 14px; text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: var(--space-3); }
.ah-hero__cta { display: flex; gap: var(--space-3); flex-wrap: wrap; margin-top: var(--space-5); }
.ah-hero--generic h1 { font-size: 32px; }

.ah-hero__visual {
  position: relative; aspect-ratio: 4/3; border-radius: var(--radius); overflow: hidden;
  background: linear-gradient(155deg, var(--color-primary) 0%, #1E3A5F 55%, var(--color-accent) 100%);
  display: flex; align-items: center; justify-content: center;
}
.ah-hero__visual svg { width: 70%; height: 70%; }
.ah-hero__visual-caption {
  position: absolute; bottom: var(--space-4); left: var(--space-4); right: var(--space-4);
  color: rgba(255,255,255,0.75); font-size: 13px;
}

.ah-quote {
  background: var(--color-card); border: 1px solid var(--color-border); border-radius: var(--radius);
  padding: var(--space-6); max-width: 640px; margin: 0 auto; text-align: center;
}
.ah-quote__mark { font-family: var(--font-display); font-size: 48px; color: var(--color-accent); line-height: 1; margin-bottom: var(--space-2); }
.ah-quote p { font-size: 20px; color: var(--color-text); margin: 0 0 var(--space-4); max-width: none; }
.ah-quote cite { font-style: normal; font-weight: 600; color: var(--color-primary); font-size: 14px; }

.ah-cta-banner { background: var(--color-primary); color: #fff; border-radius: var(--radius); padding: var(--space-6); text-align: center; }
.ah-cta-banner h2, .ah-cta-banner p { color: #fff; }
.ah-cta-banner form { display: flex; gap: var(--space-2); max-width: 420px; margin: var(--space-4) auto 0; flex-wrap: wrap; justify-content: center; }
.ah-cta-banner input[type="email"] { flex: 1; min-width: 220px; height: 44px; border-radius: var(--radius); border: none; padding: 0 var(--space-3); font-size: 16px; }

.ah-field { margin-bottom: var(--space-4); }
.ah-field label { display: block; font-size: 14px; font-weight: 600; margin-bottom: var(--space-1); }
.ah-field input, .ah-field textarea {
  width: 100%; height: 44px; border: 1px solid var(--color-border); border-radius: var(--radius);
  padding: 0 var(--space-3); font-size: 16px; font-family: var(--font-body); background: var(--color-card); color: var(--color-text);
}
.ah-field textarea { height: auto; padding: var(--space-3); min-height: 120px; }
.ah-field input:focus, .ah-field textarea:focus { outline: 2px solid var(--color-accent); outline-offset: 1px; border-color: var(--color-accent); }
.ah-field .ah-error { color: var(--color-danger); font-size: 13px; margin-top: var(--space-1); }

.ah-accordion__item { border-bottom: 1px solid var(--color-border); }
.ah-accordion__header { width: 100%; text-align: left; background: none; border: none; padding: var(--space-4) 0; cursor: pointer; display: flex; justify-content: space-between; align-items: center; font-family: var(--font-display); font-size: 18px; font-weight: 600; color: var(--color-primary); }
.ah-accordion__icon { transition: transform 200ms ease; }
.ah-accordion__item.is-open .ah-accordion__icon { transform: rotate(180deg); }
.ah-accordion__body { display: none; padding-bottom: var(--space-4); color: var(--color-muted); }
.ah-accordion__item.is-open .ah-accordion__body { display: block; }
@media (prefers-reduced-motion: reduce) { .ah-accordion__icon { transition: none; } }

.ah-breadcrumb { font-size: 13px; color: var(--color-muted); margin-bottom: var(--space-4); }
.ah-breadcrumb a { color: var(--color-muted); }

.ah-empty { text-align: center; padding: var(--space-8) var(--space-4); color: var(--color-muted); }

/* WooCommerce/LearnDash base inherit — chi tiết hơn sẽ bổ sung khi build sản phẩm/khóa học */
.woocommerce ul.products li.product .price, .learndash-wrapper .ld-price { font-family: var(--font-body); font-weight: 600; }