/**
 * OpenAnthros — Main stylesheet
 *
 * Design system: "Aether — Convergence of Intelligence" (light · tech).
 * Nền mint sáng, bề mặt kính (glass) trắng mờ, accent xanh sâu #061C15 /
 * xanh nõn #B1E09D / sage #7AA897. Display dùng Space Grotesk (dễ đọc, vẫn
 * đậm chất công nghệ), body Plus Jakarta Sans. Lưới kỹ thuật + nền WebGL tạo
 * chất "tech". Toàn bộ token khai báo trong :root, đổi thương hiệu sửa một chỗ.
 */

/* ==========================================================================
   1. Design tokens (:root) — ánh xạ từ front-matter Aether Convergence
   ========================================================================== */
:root {
  /* Colors — giữ tên biến để template không phải đổi; vai trò ánh xạ sang Aether */
  --color-primary: #061c15;            /* accent/emphasis chính (deep green) */
  --color-primary-deep: #04130e;
  --color-primary-soft: rgba(6, 28, 21, 0.06);
  --color-on-primary: #ffffff;

  --color-tertiary: #b1e09d;           /* xanh nõn — nền nút primary */
  --color-on-tertiary: #06130d;
  --color-secondary: #7aa897;          /* sage — accent phụ */

  --color-neutral: #050505;
  --color-ink: #061c15;                /* text-primary */
  --color-ink-secondary: #0b2b21;
  --color-ink-mute: #51655c;
  --color-ink-faint: #8aa69b;

  --color-canvas: #e8f7f2;             /* nền mint */
  --color-canvas-soft: #ddf3ec;        /* dải section xen kẽ */
  --color-canvas-night: #061c15;       /* surface tối: CTA, code, card kỹ thuật */
  --color-canvas-night-soft: #0a241b;

  --color-hairline: rgba(6, 28, 21, 0.10);
  --color-hairline-strong: rgba(6, 28, 21, 0.22);

  /* "brass" cũ → tái dùng làm sage (accent ấm phụ) */
  --color-accent-brass: #7aa897;
  --color-accent-brass-soft: rgba(122, 168, 151, 0.22);

  --color-on-dark: #ffffff;
  --color-on-dark-mute: #9fc4b4;
  --color-link: #0a3a2c;

  /* Glass / depth — recipe sáng nhất quán cho card, control, panel */
  --glass-bg: rgba(255, 255, 255, 0.65);
  --glass-bg-strong: rgba(255, 255, 255, 0.9);
  --glass-border: rgba(255, 255, 255, 0.85);
  --glass-blur: 12px;
  --grid-line: rgba(6, 28, 21, 0.07);  /* lưới tech động trên mint */

  /* Gradient border shell (Aether) */
  --shell-grad: linear-gradient(to right top, #e5fcf4, #cbf7e6);

  /* Typography — families (display Space Grotesk: dễ đọc, vẫn đậm chất công nghệ) */
  --font-logo: 'Geist', 'Space Grotesk', system-ui, -apple-system, sans-serif;
  --font-display: 'Space Grotesk', 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-body: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-accent: 'Space Grotesk', 'Plus Jakarta Sans', system-ui, sans-serif;
  --font-mono: ui-monospace, Menlo, Monaco, Consolas, monospace;

  /* Typography — sizes (display Aether rất lớn → dùng clamp cho hero) */
  --fs-display-xxl: clamp(46px, 8vw, 104px);
  --fs-display-xl: clamp(38px, 5vw, 64px);
  --fs-display-lg: clamp(30px, 3.4vw, 44px);
  --fs-display-md: 26px;
  --fs-heading-lg: 21px;
  --fs-heading-md: 17px;
  --fs-body-lg: 18px;
  --fs-body-md: 16px;
  --fs-button-md: 13px;
  --fs-caption: 13px;
  --fs-micro: 12px;
  --fs-code: 14px;

  /* Typography — weights (Space Grotesk display) */
  --fw-regular: 400;
  --fw-medium: 600;
  --fw-bold: 700;

  /* Spacing — nhịp gốc 8/10px */
  --space-xxs: 2px;
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 12px;
  --space-lg: 16px;
  --space-xl: 24px;
  --space-xxl: 32px;
  --space-huge: 64px;

  /* Rounded — họ 12/16/24/48/9999 (Aether), card 24px, control pill */
  --rounded-xs: 8px;
  --rounded-sm: 12px;
  --rounded-md: 16px;
  --rounded-lg: 24px;
  --rounded-xl: 32px;
  --rounded-full: 9999px;

  /* Elevation — bóng mềm light mode (Aether) */
  --shadow-1: 0 1px 2px rgba(6, 28, 21, 0.06);
  --shadow-2: 0 10px 15px -3px rgba(6, 28, 21, 0.10), 0 4px 6px -4px rgba(6, 28, 21, 0.08);
  --shadow-3: 0 25px 50px -12px rgba(6, 28, 21, 0.22);

  /* Layout */
  --container-max: 1200px;
  --section-pad-y: 96px;

  color-scheme: light;
}

/* ==========================================================================
   2. Reset & base
   ========================================================================== */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--fs-body-md);
  font-weight: var(--fw-regular);
  line-height: 1.6;
  color: var(--color-ink);
  background-color: var(--color-canvas);
  /* gradient nền mint Aether (bg-gradient-to-tr from-#e5fcf4 to-#cbf7e6) */
  background-image:
    radial-gradient(90% 60% at 85% -10%, rgba(177, 224, 157, 0.35), transparent 60%),
    radial-gradient(70% 50% at 0% 10%, rgba(122, 168, 151, 0.20), transparent 55%),
    linear-gradient(140deg, #e5fcf4 0%, #d6f2ea 45%, #cbf7e6 100%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--color-link); text-decoration: none; }
a:hover { text-decoration: underline; }

button { font-family: inherit; cursor: pointer; }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: var(--fw-medium);
  color: var(--color-ink);
  margin: 0 0 var(--space-lg);
  letter-spacing: -0.02em;
}

p { margin: 0 0 var(--space-lg); }

ul, ol { margin: 0 0 var(--space-lg); padding-left: var(--space-xl); }

code, pre { font-family: var(--font-mono); font-size: var(--fs-code); }

:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }

::selection { background: var(--color-tertiary); color: var(--color-on-tertiary); }

.screen-reader-text {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: -9999px; top: 0;
  background: var(--color-canvas-night);
  color: var(--color-on-dark);
  padding: var(--space-md) var(--space-lg);
  z-index: 1000;
  border-radius: var(--rounded-sm);
}
.skip-link:focus { left: var(--space-lg); top: var(--space-lg); }

/* Lớp nội dung nằm trên nền WebGL */
.site-header, main, .site-footer, .mobile-menu, .skip-link { position: relative; z-index: 1; }

/* --- Nền WebGL: lưới phối cảnh xanh trên mint, nhịp thở chậm; có CSS fallback --- */
.webgl-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  /* Lưới phẳng phủ toàn nền — hiện sau mọi section, trôi nhẹ liên tục */
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 48px 48px;
  animation: grid-pan 7s linear infinite;
}
@keyframes grid-pan { from { background-position: 0 0; } to { background-position: 48px 48px; } }
/* Khi WebGL 3D chạy (.is-live), ẩn lưới CSS để khỏi chồng lớp; vẫn giữ vầng sáng con trỏ (::after) */
.webgl-bg.is-live { background-image: none; animation: none; }
.webgl-bg.is-live::before { display: none; }
.webgl-bg canvas { display: block; width: 100% !important; height: 100% !important; }
/* Lưới phối cảnh — thuần CSS, luôn chạy (trôi về phía người xem) */
.webgl-bg::before {
  content: "";
  position: absolute;
  left: -50%; right: -50%; bottom: -10%;
  height: 86%;
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 46px 46px;
  transform: perspective(440px) rotateX(62deg);
  transform-origin: bottom center;
  -webkit-mask-image: linear-gradient(to top, rgba(0, 0, 0, 0.6), transparent 74%);
          mask-image: linear-gradient(to top, rgba(0, 0, 0, 0.6), transparent 74%);
  opacity: 0.95;
  animation: grid-flow 2.4s linear infinite;
  will-change: background-position;
}
/* Vầng sáng theo con trỏ (toàn trang) + vignette mép dưới */
.webgl-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle 560px at var(--px, 80%) var(--py, 26%), rgba(255, 255, 255, 0.6), rgba(177, 224, 157, 0.10) 38%, transparent 60%),
    radial-gradient(120% 90% at 50% 25%, transparent 45%, rgba(232, 247, 242, 0.5) 100%);
  transition: background 0.15s ease-out;
}
@keyframes grid-flow { from { background-position: 0 0; } to { background-position: 0 46px; } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

/* ==========================================================================
   3. Typography utility classes
   ========================================================================== */
.t-display-xxl { font-family: var(--font-display); font-size: var(--fs-display-xxl); font-weight: var(--fw-bold); line-height: 1.02; letter-spacing: -0.05em; }
.t-display-xl  { font-family: var(--font-display); font-size: var(--fs-display-xl);  font-weight: var(--fw-bold); line-height: 1.06; letter-spacing: -0.04em; }
.t-display-lg  { font-family: var(--font-display); font-size: var(--fs-display-lg);  font-weight: var(--fw-medium); line-height: 1.12; letter-spacing: -0.03em; }
.t-display-md  { font-family: var(--font-display); font-size: var(--fs-display-md);  font-weight: var(--fw-medium); line-height: 1.2;  letter-spacing: -0.02em; }
.t-heading-lg  { font-family: var(--font-display); font-size: var(--fs-heading-lg);  font-weight: var(--fw-medium); line-height: 1.3;  letter-spacing: -0.01em; }
.t-heading-md  { font-family: var(--font-display); font-size: var(--fs-heading-md);  font-weight: var(--fw-medium); line-height: 1.4; }
.t-body-lg     { font-family: var(--font-body); font-size: var(--fs-body-lg); font-weight: var(--fw-regular); line-height: 1.65; }
.t-body-md     { font-family: var(--font-body); font-size: var(--fs-body-md); font-weight: var(--fw-regular); line-height: 1.6; }
.t-caption     { font-family: var(--font-body); font-size: var(--fs-caption); font-weight: var(--fw-regular); line-height: 1.45; color: var(--color-ink-mute); }
.t-micro       { font-family: var(--font-body); font-size: var(--fs-micro); font-weight: var(--fw-medium); line-height: 1.4; letter-spacing: 0.12em; }
.t-serif       { font-family: var(--font-accent); font-style: italic; }

.text-mute { color: var(--color-ink-mute); }
.text-primary { color: var(--color-primary); }

/* ==========================================================================
   4. Layout helpers
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-xl);
}

.section { padding-block: var(--section-pad-y); }

.section--soft {
  background-color: rgba(255, 255, 255, 0.42);
  border-block: 1px solid var(--color-hairline);
  -webkit-backdrop-filter: blur(6px);
          backdrop-filter: blur(6px);
}

.section--night {
  background-color: var(--color-canvas-night);
  color: var(--color-on-dark);
}
.section--night h1, .section--night h2, .section--night h3 { color: var(--color-on-dark); }

.section-head { max-width: 760px; margin-bottom: var(--space-xxl); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  color: var(--color-primary);
  text-transform: uppercase;
}
.eyebrow::before {
  content: "";
  width: 22px; height: 1px;
  background: var(--color-secondary);
}

.stack > * + * { margin-top: var(--space-lg); }

/* Grid — collapse 3→2→1 ở 1024 / 768 */
.grid { display: grid; gap: var(--space-xl); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

/* ==========================================================================
   5. Components
   ========================================================================== */

/* --- Buttons (pill) --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  font-family: var(--font-body);
  font-size: var(--fs-button-md);
  font-weight: var(--fw-bold);
  line-height: 1;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 14px 26px;
  border-radius: var(--rounded-full);
  border: 1px solid transparent;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
  text-decoration: none;
  white-space: nowrap;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }

/* Primary — nền xanh nõn, chữ near-black (Aether button-primary) */
.btn-primary { background-color: var(--color-tertiary); color: var(--color-on-tertiary); box-shadow: var(--shadow-1); }
.btn-primary:hover { background-color: #a2dc8a; color: var(--color-on-tertiary); box-shadow: var(--shadow-2); }
.btn-primary:active { background-color: #95d27c; transform: translateY(0); }

/* Secondary — kính trắng, chữ deep green, viền hairline */
.btn-secondary-outline {
  background-color: var(--glass-bg);
  color: var(--color-ink);
  border-color: var(--color-hairline-strong);
  -webkit-backdrop-filter: blur(var(--glass-blur));
          backdrop-filter: blur(var(--glass-blur));
}
.btn-secondary-outline:hover { background-color: var(--glass-bg-strong); border-color: var(--color-primary); color: var(--color-ink); }

/* On-dark — dùng trên dải tối: nền xanh nõn nổi bật */
.btn-on-dark { background-color: var(--color-tertiary); color: var(--color-on-tertiary); }
.btn-on-dark:hover { background-color: #a2dc8a; color: var(--color-on-tertiary); }

/* Nút sáng trên dải CTA tối */
.btn-light { background-color: var(--color-tertiary); color: var(--color-on-tertiary); }
.btn-light:hover { background-color: #a2dc8a; color: var(--color-on-tertiary); }

.btn--block { width: 100%; }

/* --- Cards (glass) --- */
.card-feature {
  position: relative;
  background-color: var(--glass-bg);
  color: var(--color-ink);
  padding: var(--space-xxl);
  border-radius: var(--rounded-lg);
  border: 1px solid var(--glass-border);
  -webkit-backdrop-filter: blur(var(--glass-blur));
          backdrop-filter: blur(var(--glass-blur));
  box-shadow: var(--shadow-2);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s ease;
}
.card-feature:hover { transform: translateY(-4px); box-shadow: var(--shadow-3); }
.card-feature h3 { margin-bottom: var(--space-md); }

.card-feature-dark {
  background-color: var(--color-canvas-night);
  color: var(--color-on-dark);
  padding: var(--space-xxl);
  border-radius: var(--rounded-lg);
  border: 1px solid rgba(255, 255, 255, 0.10);
  box-shadow: var(--shadow-3);
}
.card-feature-dark h3 { color: var(--color-on-dark); }

/* --- Post card (Tin tức / archive) --- */
.post-card {
  display: flex;
  flex-direction: column;
  background-color: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--rounded-lg);
  overflow: hidden;
  -webkit-backdrop-filter: blur(var(--glass-blur));
          backdrop-filter: blur(var(--glass-blur));
  box-shadow: var(--shadow-1);
  transition: box-shadow 0.3s ease, transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.post-card:hover { box-shadow: var(--shadow-3); transform: translateY(-4px); }
.post-card__thumb { aspect-ratio: 16 / 9; background-color: var(--color-canvas-soft); overflow: hidden; }
.post-card__thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.post-card:hover .post-card__thumb img { transform: scale(1.04); }
.post-card__thumb--placeholder {
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--color-tertiary), var(--color-secondary));
  color: var(--color-primary-deep);
}
.post-card__body { display: flex; flex-direction: column; gap: var(--space-md); padding: var(--space-xl); flex: 1; }
.post-card__title { margin: 0; }
.post-card__title a { color: var(--color-ink); }
.post-card__title a:hover { color: var(--color-primary); text-decoration: none; }
.post-card__excerpt { margin: 0; color: var(--color-ink-mute); }
.post-card__meta { margin-top: auto; color: var(--color-ink-mute); }

/* --- Pills --- */
.pill-tag {
  display: inline-block;
  background-color: rgba(255, 255, 255, 0.7);
  color: var(--color-primary);
  border: 1px solid var(--color-hairline);
  font-family: var(--font-body);
  font-size: var(--fs-micro);
  font-weight: var(--fw-bold);
  line-height: 1.4;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: var(--rounded-full);
  text-decoration: none;
  align-self: flex-start;
}
a.pill-tag:hover { background-color: var(--color-tertiary); color: var(--color-on-tertiary); text-decoration: none; }

.pill-tag-brass {
  background-color: var(--color-accent-brass-soft);
  color: var(--color-primary-deep);
  border-color: rgba(122, 168, 151, 0.45);
}

/* --- Hairline divider --- */
.divider { height: 1px; background-color: var(--color-hairline); border: 0; margin: 0; }

/* ==========================================================================
   6. Header / Nav-bar
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(232, 247, 242, 0.72);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.4);
          backdrop-filter: blur(var(--glass-blur)) saturate(1.4);
  border-bottom: 1px solid var(--color-hairline);
}
.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xl);
  padding: var(--space-lg) 0;
}
.nav-brand { display: flex; align-items: center; gap: var(--space-sm); flex-shrink: 0; }
.nav-brand .site-title {
  font-family: var(--font-logo);
  font-size: 28px;
  font-weight: var(--fw-bold);
  letter-spacing: -0.04em;
  color: var(--color-ink);
  text-decoration: none;
}
.mobile-menu__head .site-title { font-family: var(--font-logo); font-size: 26px; font-weight: var(--fw-bold); letter-spacing: -0.04em; }
.nav-brand img { max-height: 40px; width: auto; }
.nav-brand .custom-logo-link { display: inline-flex; }

.nav-menu { display: flex; align-items: center; gap: var(--space-xl); list-style: none; margin: 0; padding: 0; }
.nav-menu a {
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--fs-body-md);
  font-weight: var(--fw-medium);
  text-decoration: none;
  padding: var(--space-xs) 0;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.nav-menu a:hover,
.nav-menu .current-menu-item > a { color: var(--color-primary); border-bottom-color: var(--color-secondary); }

.nav-actions { display: flex; align-items: center; gap: var(--space-lg); flex-shrink: 0; }

/* lang-switch-slot — vùng chứa widget GTranslate */
.lang-switch-slot {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-body);
  font-size: var(--fs-micro);
  font-weight: var(--fw-medium);
  letter-spacing: 0.04em;
}
.lang-switch-slot .gtranslate_wrapper,
.lang-switch-slot select,
.lang-switch-slot a,
.lang-switch-slot img { vertical-align: middle; max-width: 100%; }
.lang-switch-slot select {
  font-family: var(--font-body);
  font-size: var(--fs-micro);
  padding: var(--space-xs) var(--space-sm);
  border: 1px solid var(--color-hairline-strong);
  border-radius: var(--rounded-full);
  background-color: rgba(255, 255, 255, 0.7);
  color: var(--color-ink);
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px; height: 42px;
  padding: 0;
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid var(--color-hairline-strong);
  border-radius: var(--rounded-full);
}
.nav-toggle span { display: block; width: 18px; height: 2px; margin-inline: auto; background-color: var(--color-ink); transition: transform 0.2s ease, opacity 0.2s ease; }

/* --- Mobile menu --- */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 200;
  background-color: rgba(232, 247, 242, 0.97);
  -webkit-backdrop-filter: blur(var(--glass-blur));
          backdrop-filter: blur(var(--glass-blur));
  padding: var(--space-xl);
  overflow-y: auto;
  display: none;
  flex-direction: column;
  gap: var(--space-xl);
}
.mobile-menu.is-open { display: flex; }
body.menu-open { overflow: hidden; }
.mobile-menu__head { display: flex; align-items: center; justify-content: space-between; }
.mobile-menu__close {
  width: 42px; height: 42px;
  font-size: 24px; line-height: 1;
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid var(--color-hairline-strong);
  border-radius: var(--rounded-full);
  color: var(--color-ink);
}
.mobile-menu .search-box { width: 100%; }
.mobile-menu__links { list-style: none; margin: 0; padding: 0; }
.mobile-menu__links li { border-bottom: 1px solid var(--color-hairline); }
.mobile-menu__links a {
  display: block;
  padding: var(--space-lg) 0;
  font-family: var(--font-display);
  font-size: var(--fs-heading-lg);
  font-weight: var(--fw-medium);
  color: var(--color-ink);
  text-decoration: none;
}
.mobile-menu__links a:hover { color: var(--color-primary); }

/* --- Search box (glass) --- */
.search-box {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  background-color: var(--glass-bg);
  border: 1px solid var(--color-hairline-strong);
  border-radius: var(--rounded-full);
  padding: var(--space-sm) var(--space-lg);
  -webkit-backdrop-filter: blur(var(--glass-blur));
          backdrop-filter: blur(var(--glass-blur));
}
.search-box svg { flex-shrink: 0; color: var(--color-ink-mute); }
.search-box input[type="search"] {
  flex: 1; border: 0; background: transparent;
  font-family: var(--font-body); font-size: var(--fs-body-md);
  color: var(--color-ink); outline: none; min-width: 0;
}
.search-box input::placeholder { color: var(--color-ink-faint); }
.search-box button { border: 0; background: transparent; color: var(--color-ink-mute); padding: 0; display: inline-flex; }

/* ==========================================================================
   7. Hero
   ========================================================================== */
.hero { padding-block: var(--section-pad-y); }
.hero__inner { max-width: 920px; }
.hero h1 { margin-bottom: var(--space-xl); }
/* Hero hai cột: tiêu đề gọn hơn, dàn trang cân đối cạnh đồ họa */
.hero--split h1 {
  font-size: clamp(33px, 4.4vw, 58px);
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-lg);
}
.hero__lead {
  font-family: var(--font-body);
  font-size: var(--fs-body-lg);
  line-height: 1.65;
  color: var(--color-ink-secondary);
  margin-bottom: var(--space-xxl);
  max-width: 680px;
}
.hero--split .hero__lead { font-size: var(--fs-body-md); max-width: 540px; }
.btn-row { display: flex; flex-wrap: wrap; gap: var(--space-md); }

/* Hero hai cột */
.hero--split .hero__grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: var(--space-huge);
  align-items: center;
}
.hero--split .hero__inner { max-width: none; }
.hero__media { position: relative; }

/* Khung ảnh dùng chung */
.media-frame {
  position: relative;
  border-radius: var(--rounded-lg);
  border: 1px solid var(--glass-border);
  overflow: hidden;
  background-color: var(--color-canvas-soft);
  box-shadow: var(--shadow-3);
}
.media-frame img { width: 100%; height: 100%; object-fit: cover; display: block; }
.media-frame--ratio-32 { aspect-ratio: 3 / 2; }
.media-frame--ratio-169 { aspect-ratio: 16 / 9; }
.media-frame--brass::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 56px; height: 3px;
  background-color: var(--color-secondary);
}

/* Card kỹ thuật tối hai cột */
.feature-split-dark {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  background-color: var(--color-canvas-night);
  color: var(--color-on-dark);
  border-radius: var(--rounded-xl);
  border: 1px solid rgba(255, 255, 255, 0.10);
  overflow: hidden;
  box-shadow: var(--shadow-3);
}
.feature-split-dark__body { padding: var(--space-huge); }
.feature-split-dark__body h2 { color: var(--color-on-dark); margin-block: var(--space-lg); }
.feature-split-dark__body p { color: var(--color-on-dark-mute); }
.feature-split-dark__media { min-height: 320px; background-size: cover; background-position: center; }

/* Section hai cột có ảnh */
.split-media { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-huge); align-items: center; }
.split-media--reverse .split-media__media { order: -1; }

/* ==========================================================================
   8. CTA band — dải tối, gradient border shell sáng
   ========================================================================== */
.cta-band {
  position: relative;
  background:
    linear-gradient(var(--color-canvas-night), var(--color-canvas-night)) padding-box,
    var(--shell-grad) border-box;
  border: 1px solid transparent;
  color: var(--color-on-dark);
  padding: var(--space-huge);
  border-radius: var(--rounded-xl);
  text-align: center;
  box-shadow: var(--shadow-3);
}
.cta-band h2 {
  color: var(--color-on-dark);
  font-size: var(--fs-display-lg);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-lg);
}
.cta-band p { color: var(--color-on-dark-mute); font-size: var(--fs-body-lg); max-width: 620px; margin-inline: auto; margin-bottom: var(--space-xxl); }
.cta-band .btn-row { justify-content: center; }

/* ==========================================================================
   9. Page / article content
   ========================================================================== */
.page-hero {
  padding-block: var(--section-pad-y) var(--space-huge);
  border-bottom: 1px solid var(--color-hairline);
}
.page-hero__inner { max-width: 920px; }
.page-hero h1 { margin-bottom: var(--space-lg); }
.page-hero__lead { font-size: var(--fs-body-lg); color: var(--color-ink-secondary); margin: 0; }

.content { max-width: 760px; }
.content > h2 { font-size: var(--fs-display-md); margin-top: var(--space-huge); }
.content > h2:first-child { margin-top: 0; }
.content > h3 { font-size: var(--fs-heading-lg); margin-top: var(--space-xxl); }
.content img { border-radius: var(--rounded-lg); margin-block: var(--space-xl); }
.content blockquote {
  margin: var(--space-xl) 0;
  padding-left: var(--space-xl);
  border-left: 3px solid var(--color-secondary);
  color: var(--color-ink-secondary);
  font-family: var(--font-accent);
  font-style: italic;
  font-size: var(--fs-body-lg);
}
.content pre {
  background-color: var(--color-canvas-night);
  color: var(--color-on-dark);
  padding: var(--space-xl);
  border-radius: var(--rounded-md);
  overflow-x: auto;
}
.content :not(pre) > code {
  background-color: rgba(6, 28, 21, 0.06);
  padding: 2px 6px;
  border-radius: var(--rounded-xs);
  font-size: 0.9em;
}

/* Numbered capability blocks */
.capability {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: var(--space-xl);
  padding-block: var(--space-xxl);
  border-top: 1px solid var(--color-hairline);
  scroll-margin-top: 100px;
}
.capability__num {
  font-family: var(--font-display);
  font-size: var(--fs-display-md);
  font-weight: var(--fw-bold);
  color: var(--color-secondary);
  line-height: 1;
}
.capability h3 { margin-bottom: var(--space-md); }
.capability__sub { margin-top: var(--space-lg); }
.capability__sub strong { color: var(--color-ink); }

/* ==========================================================================
   10. Single / archive blog
   ========================================================================== */
.blog-layout { display: grid; grid-template-columns: 1fr 300px; gap: var(--space-huge); align-items: start; }
.article-header { margin-bottom: var(--space-xxl); }
.article-header h1 { font-size: var(--fs-display-lg); }
.article-meta {
  display: flex; flex-wrap: wrap; gap: var(--space-md); align-items: center;
  color: var(--color-ink-mute); margin-bottom: var(--space-lg);
}
.article-thumb { margin-bottom: var(--space-xxl); }
.article-thumb img { border-radius: var(--rounded-lg); width: 100%; }

.sidebar .widget {
  margin-bottom: var(--space-xxl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--color-hairline);
}
.sidebar .widget-title { font-size: var(--fs-heading-md); margin-bottom: var(--space-lg); }
.sidebar ul { list-style: none; padding: 0; margin: 0; }
.sidebar li { margin-bottom: var(--space-sm); }

.pagination { display: flex; gap: var(--space-sm); flex-wrap: wrap; margin-top: var(--space-huge); }
.pagination .page-numbers {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 42px; height: 42px;
  padding: 0 var(--space-md);
  border: 1px solid var(--color-hairline-strong);
  border-radius: var(--rounded-full);
  color: var(--color-ink);
  text-decoration: none;
}
.pagination .page-numbers.current { background-color: var(--color-tertiary); color: var(--color-on-tertiary); border-color: var(--color-tertiary); }
.pagination .page-numbers:hover:not(.current) { border-color: var(--color-primary); }

/* ==========================================================================
   11. Footer
   ========================================================================== */
.site-footer {
  background-color: rgba(255, 255, 255, 0.5);
  color: var(--color-ink-mute);
  border-top: 1px solid var(--color-hairline);
  -webkit-backdrop-filter: blur(8px);
          backdrop-filter: blur(8px);
  padding: var(--space-huge) 0 var(--space-xl);
}
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: var(--space-xl); margin-bottom: var(--space-huge); }
.footer-brand .site-title {
  font-family: var(--font-logo);
  font-size: 26px;
  font-weight: var(--fw-bold);
  letter-spacing: -0.04em;
  color: var(--color-ink);
  text-decoration: none;
}
.footer-brand p { margin-top: var(--space-md); max-width: 320px; }
.footer-col h4 { font-size: var(--fs-heading-md); color: var(--color-ink); margin-bottom: var(--space-lg); }
.footer-col ul { list-style: none; margin: 0; padding: 0; }
.footer-col li { margin-bottom: var(--space-sm); }
.footer-col a { color: var(--color-ink-mute); text-decoration: none; }
.footer-col a:hover { color: var(--color-primary); }

.footer-contact-item { margin-bottom: var(--space-sm); }
.footer-contact-item strong { color: var(--color-ink); }

.footer-social { display: flex; gap: var(--space-md); margin-top: var(--space-lg); }
.footer-social a {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px;
  border: 1px solid var(--color-hairline-strong);
  border-radius: var(--rounded-full);
  color: var(--color-ink-mute);
  background: rgba(255, 255, 255, 0.5);
  transition: transform 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.footer-social a:hover { color: var(--color-primary); border-color: var(--color-primary); transform: translateY(-2px); }

.footer-bottom {
  display: flex; flex-wrap: wrap; gap: var(--space-md);
  justify-content: space-between; align-items: center;
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-hairline);
}
.footer-legal-menu { display: flex; gap: var(--space-lg); list-style: none; margin: 0; padding: 0; }
.footer-legal-menu a { color: var(--color-ink-mute); text-decoration: none; }
.footer-legal-menu a:hover { color: var(--color-primary); }

/* ==========================================================================
   12. 404 & search states
   ========================================================================== */
.state-block { text-align: center; max-width: 560px; margin-inline: auto; padding-block: var(--section-pad-y); }
.state-block h1 { font-size: var(--fs-display-xl); }
.state-block .search-box { margin-top: var(--space-xl); text-align: left; }

/* ==========================================================================
   13. Responsive — breakpoints 1024 / 768
   ========================================================================== */
@media (max-width: 1024px) {
  :root { --section-pad-y: 72px; }
  .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .blog-layout { grid-template-columns: 1fr 260px; gap: var(--space-xxl); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-xxl); }
  .hero--split .hero__grid { gap: var(--space-xxl); }
}

@media (max-width: 768px) {
  :root { --section-pad-y: 56px; }
  .nav-menu { display: none; }
  .nav-actions .lang-switch-slot,
  .nav-actions .btn-primary { display: none; }
  .nav-toggle { display: flex; }

  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .blog-layout { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .capability { grid-template-columns: 1fr; gap: var(--space-md); }
  .cta-band { padding: var(--space-xxl); }
  .container { padding-inline: var(--space-lg); }

  .hero--split .hero__grid { grid-template-columns: 1fr; gap: var(--space-xl); }
  .feature-split-dark { grid-template-columns: 1fr; }
  .feature-split-dark__body { padding: var(--space-xxl); }
  .feature-split-dark__media { min-height: 220px; order: -1; }
  .split-media { grid-template-columns: 1fr; gap: var(--space-xl); }
  .split-media--reverse .split-media__media { order: 0; }
}

/* ==========================================================================
   14. Motion & dynamic — scroll reveal, hero aurora, marquee, timeline
   (vanilla JS thêm class; tất cả tôn trọng prefers-reduced-motion)
   ========================================================================== */

/* --- Scroll reveal (JS gắn .is-reveal, IntersectionObserver thêm .is-visible) --- */
.is-reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}
.is-reveal.is-visible { opacity: 1; transform: none; }

/* --- Header co lại khi cuộn --- */
.site-header { transition: padding 0.3s ease, background-color 0.3s ease, box-shadow 0.3s ease; }
.site-header.is-scrolled {
  background-color: rgba(232, 247, 242, 0.85);
  box-shadow: 0 1px 0 var(--color-hairline), var(--shadow-2);
}
.site-header.is-scrolled .nav-bar { padding-block: var(--space-md); }

/* --- Nav: gạch chân trượt mượt --- */
.nav-menu a { position: relative; border-bottom: 0 !important; }
.nav-menu a:hover::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-secondary), var(--color-tertiary));
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.nav-menu a:hover::after,
.nav-menu .current-menu-item > a::after,
.nav-menu a[aria-current="page"]::after { transform: scaleX(1); }

/* --- Hero aurora + pointer glow + gradient highlight --- */
.hero, .page-hero { position: relative; overflow: clip; --mx: 50%; --my: 30%; }
.hero::before, .page-hero::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto -10%;
  height: 130%;
  z-index: -1;
  background:
    radial-gradient(40% 50% at 18% 20%, rgba(177, 224, 157, 0.55), transparent 60%),
    radial-gradient(38% 46% at 82% 12%, rgba(122, 168, 151, 0.45), transparent 62%),
    radial-gradient(34% 40% at 60% 80%, rgba(99, 102, 241, 0.18), transparent 60%);
  filter: blur(8px);
  animation: aurora-float 18s ease-in-out infinite alternate;
}
/* Vầng sáng theo con trỏ */
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: radial-gradient(280px 280px at var(--mx) var(--my), rgba(255, 255, 255, 0.6), transparent 70%);
  opacity: 0.7;
  transition: background 0.2s ease;
  pointer-events: none;
}
@keyframes aurora-float {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  50%  { transform: translate3d(2%, 2%, 0) scale(1.08); }
  100% { transform: translate3d(-2%, 1%, 0) scale(1.04); }
}

.text-gradient {
  background: linear-gradient(100deg, #061c15 0%, #2f7a5f 40%, #7aa897 70%, #b1e09d 100%);
  background-size: 220% auto;
  -webkit-background-clip: text;
          background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  animation: gradient-pan 6s ease-in-out infinite alternate;
}
@keyframes gradient-pan { to { background-position: 100% center; } }

/* Hình hero "thở" nhẹ */
.float-slow { animation: float-slow 7s ease-in-out infinite alternate; }
@keyframes float-slow { from { transform: translateY(0); } to { transform: translateY(-12px); } }

/* --- Tech marquee (dải từ khóa công nghệ chạy ngang) --- */
.marquee {
  overflow: hidden;
  border-block: 1px solid var(--color-hairline);
  background: rgba(255, 255, 255, 0.35);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
          mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.marquee__track {
  display: flex;
  align-items: center;
  gap: var(--space-xxl);
  width: max-content;
  padding-block: var(--space-lg);
  animation: marquee 34s linear infinite;
}
.marquee:hover .marquee__track { animation-play-state: paused; }
.marquee__item {
  font-family: var(--font-display);
  font-weight: var(--fw-medium);
  font-size: var(--fs-heading-md);
  letter-spacing: -0.01em;
  color: var(--color-ink-secondary);
  display: inline-flex;
  align-items: center;
  gap: var(--space-md);
  white-space: nowrap;
}
.marquee__item::before {
  content: "";
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--color-secondary);
}
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* --- Icon badge (Solar-style linear, trong card năng lực) --- */
.icon-badge {
  display: inline-grid;
  place-items: center;
  width: 52px; height: 52px;
  border-radius: var(--rounded-md);
  background: linear-gradient(140deg, rgba(177, 224, 157, 0.55), rgba(122, 168, 151, 0.30));
  border: 1px solid var(--glass-border);
  color: var(--color-primary);
  margin-bottom: var(--space-lg);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.icon-badge svg { width: 26px; height: 26px; stroke: currentColor; fill: none; stroke-width: 1.6; }
.card-feature:hover .icon-badge { transform: translateY(-3px) rotate(-4deg); }

/* Sheen quét qua card khi hover */
.card-feature { overflow: hidden; }
.card-feature::after {
  content: "";
  position: absolute;
  top: 0; left: -120%;
  width: 60%; height: 100%;
  background: linear-gradient(100deg, transparent, rgba(255, 255, 255, 0.45), transparent);
  transform: skewX(-18deg);
  transition: left 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
}
.card-feature:hover::after { left: 130%; }

/* --- Stat strip (số liệu count-up) --- */
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-xl); }
.stat-card {
  text-align: center;
  padding: var(--space-xl);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--rounded-lg);
  -webkit-backdrop-filter: blur(var(--glass-blur));
          backdrop-filter: blur(var(--glass-blur));
}
.stat-card__num {
  font-family: var(--font-display);
  font-size: var(--fs-display-md);
  font-weight: var(--fw-bold);
  letter-spacing: -0.03em;
  color: var(--color-primary);
  line-height: 1;
}
.stat-card__label { margin-top: var(--space-sm); color: var(--color-ink-mute); font-size: var(--fs-caption); }

/* --- Timeline (dùng cho trang Năng lực / Quy trình) --- */
.timeline { position: relative; }
.capability { position: relative; }
.capability::before {
  content: "";
  position: absolute;
  left: 31px; top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(var(--color-secondary), transparent);
}
.capability:last-child::before { display: none; }
.capability__num {
  position: relative;
  z-index: 1;
  display: inline-grid;
  place-items: center;
  width: 64px; height: 64px;
  border-radius: 50%;
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline-strong);
  box-shadow: var(--shadow-1);
}

/* --- Reduced motion: tắt mọi animation tự chạy --- */
@media (prefers-reduced-motion: reduce) {
  .is-reveal { opacity: 1 !important; transform: none !important; }
  .hero::before, .page-hero::before,
  .text-gradient, .float-slow, .marquee__track,
  .tech-orbit__svg, .tech-orbit__spin, .tech-orbit__spin--rev,
  .tech-orbit__spin--slow, .tech-orbit__core, .tech-orbit__pulse,
  .tech-orbit__prongs-spin, .tech-orbit__dot,
  .webgl-bg, .webgl-bg::before { animation: none !important; }
  .hero::after { display: none; }
}

@media (max-width: 1024px) {
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .stat-grid { grid-template-columns: 1fr 1fr; }
}

/* ==========================================================================
   15. Đồ họa kỹ thuật động (hero) — quỹ đạo + nút mạng, thuần SVG/CSS
   ========================================================================== */
.tech-orbit {
  position: relative;
  width: 100%;
  max-width: 460px;
  margin-inline: auto;
  aspect-ratio: 1 / 1;
  display: grid;
  place-items: center;
}
/* Đĩa kính nền + quầng sáng */
.tech-orbit::before {
  content: "";
  position: absolute;
  inset: 6%;
  border-radius: 50%;
  background:
    radial-gradient(60% 60% at 50% 38%, rgba(177, 224, 157, 0.55), transparent 70%),
    var(--glass-bg);
  border: 1px solid var(--glass-border);
  -webkit-backdrop-filter: blur(var(--glass-blur));
          backdrop-filter: blur(var(--glass-blur));
  box-shadow: var(--shadow-3);
}
.tech-orbit__svg {
  position: relative;
  width: 92%;
  height: 92%;
  overflow: visible;
  color: var(--color-primary);
  animation: float-slow 7s ease-in-out infinite alternate;
}
.tech-orbit__svg .ring { fill: none; stroke: var(--color-secondary); stroke-opacity: 0.5; }
.tech-orbit__svg .ring--dashed { stroke-dasharray: 4 10; stroke-opacity: 0.7; }
.tech-orbit__spin       { transform-origin: 200px 200px; animation: spin 26s linear infinite; }
.tech-orbit__spin--rev  { transform-origin: 200px 200px; animation: spin 34s linear infinite reverse; }
.tech-orbit__spin--slow { transform-origin: 200px 200px; animation: spin 46s linear infinite; }
.tech-orbit__node { fill: var(--color-tertiary); stroke: var(--color-secondary); stroke-width: 1.5; }
.tech-orbit__node--brass { fill: var(--color-tertiary); stroke: var(--color-secondary); stroke-width: 1.5; }
.tech-orbit__link { stroke: var(--color-secondary); stroke-opacity: 0.45; stroke-width: 1.5; }
.tech-orbit__core {
  fill: none;
  stroke: var(--color-primary);
  stroke-width: 2;
  transform-origin: 200px 200px;
  animation: core-pulse 4.5s ease-in-out infinite;
}
.tech-orbit__core--fill { fill: var(--color-tertiary); stroke: none; }
.tech-orbit__glyph { fill: none; stroke: var(--color-primary); stroke-width: 2; }
.tech-orbit__pulse { transform-origin: center; animation: node-pulse 3s ease-in-out infinite; }
.tech-orbit__pulse--b { animation-delay: 1s; }
.tech-orbit__pulse--c { animation-delay: 2s; }

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes core-pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50%      { transform: scale(1.06); opacity: 0.85; }
}
@keyframes node-pulse {
  0%, 100% { opacity: 0.6; }
  50%      { opacity: 1; }
}

/* ==========================================================================
   16. Card năng lực dạng liên kết (click chuyển trang trong)
   ========================================================================== */
a.card-feature { display: flex; flex-direction: column; color: var(--color-ink); text-decoration: none; }
a.card-feature:hover { text-decoration: none; }
.card-feature__more {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
  font-family: var(--font-body);
  font-size: var(--fs-micro);
  font-weight: var(--fw-bold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
}
.card-feature__more svg {
  width: 16px; height: 16px;
  stroke: currentColor; fill: none; stroke-width: 2;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
a.card-feature:hover .card-feature__more svg { transform: translateX(4px); }
/* Hàng tag + nhãn chuyên mục trong card */
.card-feature__top { display: flex; align-items: center; justify-content: space-between; gap: var(--space-md); margin-bottom: var(--space-md); }
.card-feature__top .icon-badge { margin-bottom: 0; }

/* ==========================================================================
   17. Trang Năng lực & Dịch vụ — bản dựng giàu đồ họa hơn
   ========================================================================== */
/* Page-hero hai cột (chữ + đồ họa quỹ đạo) */
.page-hero--split .page-hero__grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-huge);
  align-items: center;
}
.page-hero--split .page-hero__inner { max-width: none; }
.page-hero--split .tech-orbit { max-width: 380px; }

/* Khối năng lực: thêm icon + chip, số dạng gradient */
.capability__head { display: flex; align-items: center; gap: var(--space-lg); margin-bottom: var(--space-md); }
.capability__head .icon-badge { margin-bottom: 0; flex-shrink: 0; }
.capability__head h3 { margin: 0; }
.capability__chips { display: flex; flex-wrap: wrap; gap: var(--space-sm); margin-top: var(--space-lg); }
.capability__num {
  background:
    linear-gradient(var(--color-canvas), var(--color-canvas)) padding-box,
    linear-gradient(150deg, var(--color-tertiary), var(--color-secondary)) border-box;
  border: 2px solid transparent !important;
  color: var(--color-primary);
  -webkit-text-fill-color: initial;
}

@media (max-width: 900px) {
  .page-hero--split .page-hero__grid { grid-template-columns: 1fr; gap: var(--space-xl); }
  .page-hero--split .tech-orbit { max-width: 300px; order: -1; }
}
@media (max-width: 768px) {
  .capability__head { gap: var(--space-md); }
}

/* ==========================================================================
   18. Menu dropdown (Dịch vụ) — desktop hover + mobile accordion
   ========================================================================== */
/* --- Desktop: submenu kính nổi khi hover/focus --- */
.nav-menu .menu-item-has-children { position: relative; }
.nav-menu .menu-item-has-children > a { display: inline-flex; align-items: center; gap: 4px; }
.nav-menu .caret {
  display: inline-block;
  width: 7px; height: 7px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  position: relative; top: -2px;
  opacity: 0.6;
  transition: transform 0.25s ease, top 0.25s ease;
}
.nav-menu .menu-item-has-children:hover .caret,
.nav-menu .menu-item-has-children:focus-within .caret { transform: rotate(225deg); top: 1px; opacity: 0.9; }
.nav-menu .sub-menu {
  position: absolute;
  top: calc(100% + 14px);
  left: -14px;
  min-width: 300px;
  list-style: none;
  margin: 0;
  padding: var(--space-sm);
  background: var(--glass-bg-strong);
  border: 1px solid var(--glass-border);
  border-radius: var(--rounded-md);
  box-shadow: var(--shadow-3);
  -webkit-backdrop-filter: blur(var(--glass-blur));
          backdrop-filter: blur(var(--glass-blur));
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  z-index: 120;
}
/* cầu nối vô hình để con trỏ không rớt submenu */
.nav-menu .menu-item-has-children::after {
  content: ""; position: absolute; left: 0; right: 0; top: 100%; height: 16px;
}
.nav-menu .menu-item-has-children:hover > .sub-menu,
.nav-menu .menu-item-has-children:focus-within > .sub-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.nav-menu .sub-menu li { display: block; }
.nav-menu .sub-menu a {
  display: block;
  padding: 10px 14px;
  border-radius: var(--rounded-sm);
  font-size: var(--fs-body-md);
  font-weight: var(--fw-medium);
  color: var(--color-ink);
  white-space: normal;
}
.nav-menu .sub-menu a::after { display: none; }
.nav-menu .sub-menu a:hover { background: var(--color-primary-soft); color: var(--color-primary); }
.nav-menu .sub-menu li:last-child a { color: var(--color-primary); font-weight: var(--fw-bold); }

/* caret chỉ hiện ở desktop; nút toggle chỉ hiện ở mobile (bản WordPress xuất cả hai) */
.nav-menu .submenu-toggle { display: none; }
.mobile-menu__links .caret { display: none; }

/* --- Mobile: accordion trong mobile menu --- */
.mobile-menu__links .menu-item-has-children { position: relative; }
.mobile-menu__links .submenu-toggle {
  position: absolute;
  right: 0; top: 6px;
  width: 48px; height: 48px;
  background: transparent;
  border: 0;
  color: var(--color-ink);
}
.mobile-menu__links .submenu-toggle::after {
  content: ""; display: block;
  width: 11px; height: 11px;
  margin: 0 auto;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  transition: transform 0.25s ease;
}
.mobile-menu__links .submenu-toggle[aria-expanded="true"]::after { transform: rotate(225deg); }
.mobile-menu__links .sub-menu {
  list-style: none; margin: 0;
  padding: 0 0 var(--space-md) var(--space-lg);
  display: none;
}
.mobile-menu__links .menu-item-has-children.is-open > .sub-menu { display: block; }
.mobile-menu__links .sub-menu li { border-bottom: 0; }
.mobile-menu__links .sub-menu a {
  font-family: var(--font-body);
  font-size: var(--fs-body-lg);
  font-weight: var(--fw-regular);
  padding: var(--space-md) 0;
}

/* ==========================================================================
   19. Case study (trang Dự án)
   ========================================================================== */
.case-study {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: var(--space-huge);
  align-items: center;
  padding-block: var(--space-xxl);
}
.case-study + .case-study { border-top: 1px solid var(--color-hairline); }
.case-study--reverse .case-study__visual { order: -1; }
.case-study__visual {
  position: relative;
  border-radius: var(--rounded-xl);
  padding: var(--space-huge) var(--space-xl);
  background: linear-gradient(150deg, rgba(177, 224, 157, 0.30), rgba(122, 168, 151, 0.16));
  border: 1px solid var(--glass-border);
  display: grid;
  place-items: center;
  min-height: 280px;
  overflow: hidden;
}
.case-study__visual .icon-badge { width: 84px; height: 84px; margin: 0; }
.case-study__visual .icon-badge svg { width: 40px; height: 40px; }
.case-study__kicker { display: flex; flex-wrap: wrap; gap: var(--space-sm); margin-bottom: var(--space-md); }
.case-study h2 { margin-bottom: var(--space-lg); }
.case-study__block { margin-bottom: var(--space-lg); }
.case-study__block h4 {
  font-family: var(--font-body);
  font-size: var(--fs-micro);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ink-mute);
  margin: 0 0 var(--space-xs);
}
.case-study__block p { margin: 0; color: var(--color-ink-secondary); }
.case-study .stat-grid { grid-template-columns: repeat(3, 1fr); margin-top: var(--space-xl); gap: var(--space-md); }
.case-study .stat-card { padding: var(--space-lg); }

@media (max-width: 900px) {
  .case-study { grid-template-columns: 1fr; gap: var(--space-xl); }
  .case-study--reverse .case-study__visual { order: 0; }
  .case-study .stat-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ==========================================================================
   20. Trang dịch vụ chi tiết + breadcrumb + khối About
   ========================================================================== */
.breadcrumb {
  display: flex; flex-wrap: wrap; gap: var(--space-sm); align-items: center;
  font-family: var(--font-body); font-size: var(--fs-micro); font-weight: var(--fw-medium);
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--color-ink-mute);
  margin-bottom: var(--space-md);
}
.breadcrumb a { color: var(--color-ink-mute); }
.breadcrumb a:hover { color: var(--color-primary); text-decoration: none; }
.breadcrumb span { opacity: 0.45; }

/* Đồ họa hero cho trang dịch vụ: lưới kỹ thuật + icon lớn + chip nổi */
.service-figure {
  position: relative;
  width: 100%; max-width: 420px; margin-inline: auto;
  aspect-ratio: 1 / 1;
  border-radius: var(--rounded-xl);
  background: linear-gradient(150deg, rgba(177, 224, 157, 0.40), rgba(122, 168, 151, 0.18));
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-3);
  display: grid; place-items: center; overflow: hidden;
}
.service-figure::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 32px 32px; opacity: 0.7;
  -webkit-mask-image: radial-gradient(70% 70% at 50% 50%, #000, transparent 85%);
          mask-image: radial-gradient(70% 70% at 50% 50%, #000, transparent 85%);
}
.service-figure .icon-badge {
  width: 124px; height: 124px; margin: 0; border-radius: var(--rounded-lg);
  position: relative; z-index: 1; box-shadow: var(--shadow-2);
  animation: float-slow 7s ease-in-out infinite alternate;
}
.service-figure .icon-badge svg { width: 58px; height: 58px; stroke-width: 1.4; }
.service-figure__chip {
  position: absolute; z-index: 2;
  background: var(--glass-bg-strong); border: 1px solid var(--glass-border);
  border-radius: var(--rounded-full); padding: 6px 14px;
  font-family: var(--font-body); font-size: var(--fs-micro); font-weight: var(--fw-bold);
  color: var(--color-primary); box-shadow: var(--shadow-2);
  animation: float-slow 6s ease-in-out infinite alternate;
}
.service-figure__chip--a { top: 13%; left: 6%; }
.service-figure__chip--b { bottom: 15%; right: 5%; animation-delay: 1.4s; }
.service-figure__chip--c { bottom: 32%; left: 3%; animation-delay: 0.8s; }

/* Heading căn giữa (dùng cho hub dịch vụ / about) */
.section-head--center { margin-inline: auto; text-align: center; max-width: 720px; }

/* Khối nổi bật (triết lý / tầm nhìn) trên trang About */
.statement {
  position: relative;
  padding: var(--space-huge);
  border-radius: var(--rounded-xl);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-2);
  -webkit-backdrop-filter: blur(var(--glass-blur));
          backdrop-filter: blur(var(--glass-blur));
}
.statement__mark {
  font-family: var(--font-display); font-size: 64px; line-height: 0.7;
  color: var(--color-secondary); display: block; margin-bottom: var(--space-sm);
}
.statement p { font-size: var(--fs-body-lg); color: var(--color-ink-secondary); margin: 0; }

@media (max-width: 768px) {
  .service-figure { max-width: 300px; }
  .statement { padding: var(--space-xxl); }
}

/* ==========================================================================
   21. Dải đối tác (marquee tên thương hiệu) + biến thể layout trang dịch vụ
   ========================================================================== */
/* Đối tác: chữ lớn chạy ngang, không cần logo */
.partners-label {
  text-align: center;
  font-family: var(--font-body); font-size: var(--fs-micro); font-weight: var(--fw-bold);
  letter-spacing: 0.16em; text-transform: uppercase; color: var(--color-ink-mute);
  margin-bottom: var(--space-xl);
}
.marquee--brand { opacity: 0.7; }
.marquee--brand .marquee__track { gap: var(--space-huge); padding-block: var(--space-lg); animation-duration: 40s; }
.marquee--brand .marquee__item {
  font-family: var(--font-display); font-weight: var(--fw-bold);
  font-size: clamp(20px, 3vw, 34px); letter-spacing: -0.02em;
  text-transform: none; color: var(--color-ink-secondary);
}
.marquee--brand .marquee__item::before { width: 8px; height: 8px; background: var(--color-secondary); opacity: 0.55; }

/* Hero dịch vụ — biến thể */
.page-hero--reverse .page-hero__grid { grid-template-columns: 0.9fr 1.1fr; }
.page-hero--reverse .service-figure { order: -1; }
.page-hero--center { text-align: center; }
.page-hero--center .page-hero__inner { max-width: 760px; margin-inline: auto; }
.page-hero--center .breadcrumb,
.page-hero--center .btn-row { justify-content: center; }
.page-hero--center .service-figure { margin: var(--space-xxl) auto 0; max-width: 340px; }

/* Danh sách "feature row" (hàng ngang icon + nội dung) cho layout dạng list */
.feature-rows { max-width: 920px; }
.feature-row {
  display: grid; grid-template-columns: 84px 1fr; gap: var(--space-xl);
  align-items: flex-start; padding-block: var(--space-xl);
  border-top: 1px solid var(--color-hairline);
}
.feature-row:first-child { border-top: 0; padding-top: 0; }
.feature-row .icon-badge { width: 72px; height: 72px; margin: 0; }
.feature-row .icon-badge svg { width: 34px; height: 34px; }
.feature-row h3 { margin: 0 0 var(--space-xs); }
.feature-row p { margin: 0; color: var(--color-ink-mute); }

@media (max-width: 900px) {
  .page-hero--reverse .page-hero__grid { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .feature-row { grid-template-columns: 1fr; gap: var(--space-sm); }
}

/* ==========================================================================
   22. Brand identity — logo lockup (mark 6 chấu + wordmark tonal split)
   ========================================================================== */
.brand-lockup { display: inline-flex; align-items: center; gap: 9px; text-decoration: none; line-height: 1; font-size: 25px; }
.brand-lockup:hover { text-decoration: none; }
.brand-lockup__mark { display: inline-flex; width: 1.15em; height: 1.15em; color: var(--color-ink); flex-shrink: 0; }
.brand-lockup__mark svg { width: 100%; height: 100%; display: block; }
.brand-lockup__wm { font-family: var(--font-logo); font-size: 1em; letter-spacing: -0.025em; line-height: 1; white-space: nowrap; }
.brand-lockup__wm .wm-open { font-weight: 400; color: var(--color-ink-mute); }
.brand-lockup__wm .wm-anthros { font-weight: 600; color: var(--color-ink); }
.nav-brand .brand-lockup { font-size: 25px; }
.footer-brand .brand-lockup { font-size: 23px; margin-bottom: var(--space-sm); }
.mobile-menu__head .brand-lockup { font-size: 23px; }

/* Dòng endorsement KCX (chuẩn brand) */
.brand-endorse {
  font-family: var(--font-body); font-size: var(--fs-micro);
  letter-spacing: 0.16em; text-transform: uppercase; color: var(--color-ink-faint);
}

/* Mark ở tâm đồ họa quỹ đạo hero */
.tech-orbit__mark { fill: var(--color-primary); }

/* ==========================================================================
   23. Orbit hero v2 — prongs (mũi tên) quay ở vòng ngoài, tâm là vòng tròn
   ========================================================================== */
/* Vòng ngoài quay (wrapper) + cụm mũi tên co/giãn riêng để hover gom vào tâm */
.tech-orbit__prongs-spin { transform-origin: 200px 200px; animation: spin 26s linear infinite; }
.tech-orbit__prongs { transform-origin: 200px 200px; transform: scale(1); transition: transform 0.7s cubic-bezier(0.16, 1, 0.3, 1); fill: var(--color-primary); }
/* Hover vào đồ họa: dừng quay, mũi tên gom sát vào trung tâm như icon logo */
.tech-orbit:hover .tech-orbit__prongs-spin { animation-play-state: paused; }
.tech-orbit:hover .tech-orbit__prongs { transform: scale(0.32); }
.tech-orbit__dot { fill: var(--color-tertiary); transform-origin: 200px 200px; animation: core-pulse 4.5s ease-in-out infinite; transition: fill 0.5s ease; }
/* Hover: tâm chuyển từ xanh sang đen (khớp favicon); các dot vệ tinh vẫn bay quanh */
.tech-orbit:hover .tech-orbit__dot { fill: #0a0a0a; }
.tech-orbit__dot-ring { fill: none; stroke: var(--color-primary); stroke-opacity: 0.25; stroke-width: 1.5; }

/* ==========================================================================
   24. Form liên hệ (.oa-form) — khớp Contact Form 7 với mẫu demo
   ========================================================================== */
.oa-form {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--rounded-lg);
  padding: var(--space-xxl);
  -webkit-backdrop-filter: blur(var(--glass-blur));
          backdrop-filter: blur(var(--glass-blur));
  box-shadow: var(--shadow-2);
}
.oa-form > h3 { margin: 0 0 var(--space-xs); }
.oa-form__intro { margin: 0 0 var(--space-lg); color: var(--color-ink-mute); font-size: var(--fs-body-md); }
.oa-form p { margin: 0 0 var(--space-md); }
.oa-form__row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-md); }
.oa-form__row p { margin: 0 0 var(--space-md); }
.oa-form .wpcf7-form-control-wrap { display: block; }

.oa-form input[type="text"],
.oa-form input[type="email"],
.oa-form input[type="tel"],
.oa-form input[type="url"],
.oa-form input[type="number"],
.oa-form textarea {
  display: block;
  width: 100%;
  font-family: var(--font-body);
  font-size: var(--fs-body-md);
  color: var(--color-ink);
  background: var(--glass-bg-strong);
  border: 1px solid var(--color-hairline-strong);
  border-radius: var(--rounded-full);
  padding: 13px 18px;
  outline: none;
  box-sizing: border-box;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.oa-form textarea {
  border-radius: var(--rounded-md);
  min-height: 130px;
  resize: vertical;
  line-height: 1.6;
  padding: 14px 18px;
}
.oa-form input::placeholder,
.oa-form textarea::placeholder { color: var(--color-ink-faint); }
.oa-form input:focus,
.oa-form textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-soft);
}

.oa-form__actions { margin-bottom: 0; }
.oa-form input[type="submit"],
.oa-form button[type="submit"],
.oa-form .oa-submit {
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-body); font-size: var(--fs-button-md); font-weight: var(--fw-bold);
  letter-spacing: 0.02em; text-transform: uppercase; line-height: 1;
  background-color: var(--color-tertiary); color: var(--color-on-tertiary);
  border: 1px solid transparent; border-radius: var(--rounded-full);
  padding: 15px 30px; cursor: pointer; box-shadow: var(--shadow-1);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), background-color 0.2s ease, box-shadow 0.2s ease;
}
.oa-form input[type="submit"]:hover,
.oa-form button[type="submit"]:hover,
.oa-form .oa-submit:hover { background-color: #a2dc8a; transform: translateY(-2px); box-shadow: var(--shadow-2); }

/* Contact Form 7: tip lỗi, message phản hồi, spinner */
.oa-form .wpcf7-not-valid-tip { color: #b3261e; font-size: var(--fs-caption); margin-top: 5px; display: block; }
.oa-form input.wpcf7-not-valid,
.oa-form textarea.wpcf7-not-valid { border-color: #d9534f; }
.wpcf7-response-output {
  margin: var(--space-md) 0 0 !important;
  padding: 11px 16px !important;
  border-radius: var(--rounded-sm) !important;
  font-family: var(--font-body); font-size: var(--fs-caption); line-height: 1.5;
}
.wpcf7 form.invalid .wpcf7-response-output,
.wpcf7 form.unaccepted .wpcf7-response-output,
.wpcf7 form.payment-required .wpcf7-response-output {
  border: 1px solid #e6bfbb !important; background: #fdeeec; color: #7a231f;
}
.wpcf7 form.sent .wpcf7-response-output {
  border: 1px solid rgba(122, 168, 151, 0.5) !important;
  background: rgba(177, 224, 157, 0.25); color: var(--color-primary-deep);
}
.wpcf7-spinner { background-color: var(--color-secondary); }

@media (max-width: 560px) {
  .oa-form__row { grid-template-columns: 1fr; }
}