/* Soft For Her – design tokens from docs/02-design.md */
/* Fonts – tự host (SIL OFL, giấy phép trong public/fonts/v1/). Nội dung file font đổi → đổi thư mục v1 thành v2,
   vì /fonts được cache 1 năm (immutable). Be Vietnam Pro 300/400/500; Cormorant Garamond 400/500 + 400 nghiêng. */
@font-face { font-family: 'Be Vietnam Pro'; font-style: normal; font-weight: 300; font-display: swap;
  src: url(/fonts/v1/be-vietnam-pro-latin-300-normal.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,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD; }
@font-face { font-family: 'Be Vietnam Pro'; font-style: normal; font-weight: 300; font-display: swap;
  src: url(/fonts/v1/be-vietnam-pro-vietnamese-300-normal.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: 400; font-display: swap;
  src: url(/fonts/v1/be-vietnam-pro-latin-400-normal.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,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD; }
@font-face { font-family: 'Be Vietnam Pro'; font-style: normal; font-weight: 400; font-display: swap;
  src: url(/fonts/v1/be-vietnam-pro-vietnamese-400-normal.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: 500; font-display: swap;
  src: url(/fonts/v1/be-vietnam-pro-latin-500-normal.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,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD; }
@font-face { font-family: 'Be Vietnam Pro'; font-style: normal; font-weight: 500; font-display: swap;
  src: url(/fonts/v1/be-vietnam-pro-vietnamese-500-normal.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: 'Cormorant Garamond'; font-style: normal; font-weight: 400; font-display: swap;
  src: url(/fonts/v1/cormorant-garamond-latin-400-normal.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,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD; }
@font-face { font-family: 'Cormorant Garamond'; font-style: normal; font-weight: 400; font-display: swap;
  src: url(/fonts/v1/cormorant-garamond-vietnamese-400-normal.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: 'Cormorant Garamond'; font-style: normal; font-weight: 500; font-display: swap;
  src: url(/fonts/v1/cormorant-garamond-latin-500-normal.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,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD; }
@font-face { font-family: 'Cormorant Garamond'; font-style: normal; font-weight: 500; font-display: swap;
  src: url(/fonts/v1/cormorant-garamond-vietnamese-500-normal.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: 'Cormorant Garamond'; font-style: italic; font-weight: 400; font-display: swap;
  src: url(/fonts/v1/cormorant-garamond-latin-400-italic.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,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD; }
@font-face { font-family: 'Cormorant Garamond'; font-style: italic; font-weight: 400; font-display: swap;
  src: url(/fonts/v1/cormorant-garamond-vietnamese-400-italic.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 dự phòng chỉnh kích thước để trang không bị nhảy khi font thật tải xong
   (size-adjust/override tính từ độ rộng ký tự trung bình và metric dọc so với Times New Roman / Arial). */
@font-face { font-family: 'Cormorant Fallback'; src: local('Times New Roman'), local('TimesNewRomanPSMT');
  size-adjust: 97.3%; ascent-override: 94.9%; descent-override: 29.5%; line-gap-override: 0%; }
@font-face { font-family: 'Be Vietnam Pro Fallback'; src: local('Arial'), local('ArialMT');
  size-adjust: 109.4%; ascent-override: 91.4%; descent-override: 24.2%; line-gap-override: 0%; }

:root {
  --cream: #FAF5F0;
  --blush: #F5E9E4;
  --dusty-rose: #DDBFB3;
  --rosewood: #A0675A;
  --champagne: #B89B72;
  --espresso: #3B2F2A;
  --muted: #6E5850;
  --line: #E6D3C6;
  --serif: 'Cormorant Garamond', 'Cormorant Fallback', Georgia, serif;
  --sans: 'Be Vietnam Pro', 'Be Vietnam Pro Fallback', system-ui, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--cream);
  color: var(--espresso);
  font-family: var(--sans);
  font-weight: 300;
  line-height: 1.7;
}
h1, h2, h3, p { margin: 0; }
a { color: var(--espresso); }
a:hover { color: var(--rosewood); }

/* Layout */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.container.narrow { max-width: 820px; }
.container.mid { max-width: 1000px; }
.center { text-align: center; }
.center-block { margin-left: auto; margin-right: auto; max-width: 640px; }
.section { padding: 112px 0; }
.section-blush { background: var(--blush); }
.section-dark { background: var(--espresso); color: var(--cream); }
.section-head { text-align: center; margin-bottom: 64px; }

/* Type */
.eyebrow { font-size: 13px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--muted); margin-bottom: 16px; }
.eyebrow-gold { color: #D9C3A5; }
.display { font-family: var(--serif); font-weight: 400; font-size: clamp(42px, 6vw, 64px); line-height: 1.12; margin-bottom: 28px; }
.heading { font-family: var(--serif); font-weight: 400; font-size: clamp(34px, 4.5vw, 46px); line-height: 1.2; }
.heading-spaced { margin-bottom: 56px; }
#loi-ngo .heading { margin-bottom: 32px; }
.accent { color: var(--rosewood); }
.accent-light { color: #E9CFC4; }
.lead { font-size: 18px; color: var(--muted); max-width: 480px; margin-bottom: 40px; }
#loi-ngo .lead { max-width: 640px; margin-bottom: 0; }
.muted { color: var(--muted); }
.small { font-size: 14px; }
.on-dark-muted { color: #E6D8CF; }
.divider { width: 64px; height: 1px; background: var(--champagne); margin: 48px auto 0; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px; padding: 14px 32px;
  font-size: 14px; letter-spacing: 0.1em; text-transform: uppercase;
  text-decoration: none; border: 1px solid transparent;
  transition: background-color .25s, color .25s, border-color .25s;
}
.btn-sm { padding: 10px 22px; font-size: 13px; }
.btn-primary { background: var(--espresso); color: var(--cream); }
.btn-primary:hover { background: var(--rosewood); color: var(--cream); }
.btn-outline { border-color: var(--champagne); color: var(--espresso); }
.btn-outline:hover { background: var(--cream); color: var(--espresso); }
.btn-dark-outline { border-color: var(--espresso); color: var(--espresso); }
.btn-dark-outline:hover { background: var(--espresso); color: var(--cream); }
.btn-row { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 32px; }
.btn-row-center { justify-content: center; margin-bottom: 24px; }

/* Header */
.site-header { background: var(--blush); border-bottom: 1px solid var(--line); }
.header-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px; padding-top: 20px; padding-bottom: 20px; }
.logo { font-family: var(--serif); font-size: 22px; font-weight: 500; letter-spacing: 0.22em; text-decoration: none; color: var(--espresso); }
.logo-lg { font-size: 24px; margin-bottom: 12px; }
.nav { display: flex; flex-wrap: wrap; align-items: center; gap: 28px; font-size: 14px; }
.nav > a:not(.btn) { text-decoration: none; }
.lang-switch { font-size: 13px; letter-spacing: 0.1em; color: var(--muted); }
.lang-switch a { color: var(--muted); text-decoration: none; }
.lang-current { color: var(--espresso); font-weight: 500; }

/* Placeholders (replace with real photos) */
.placeholder { background: var(--dusty-rose); display: flex; align-items: flex-end; padding: 24px; }
.placeholder-label { font-size: 13px; color: #5E3A31; background: var(--blush); padding: 6px 12px; }

/* Hero */
.hero { display: flex; flex-wrap: wrap; align-items: center; gap: 64px; padding-top: 88px; padding-bottom: 104px; }
.hero-text { flex: 1 1 460px; min-width: 0; }
.hero-image { flex: 1 1 420px; min-width: 0; height: 560px; outline: 1px solid var(--champagne); outline-offset: 16px; overflow: hidden; background: var(--dusty-rose); }
.hero-image picture { display: block; width: 100%; height: 100%; }
.hero-image img { width: 100%; height: 100%; object-fit: cover; }

/* Services */
.services { display: flex; flex-wrap: wrap; gap: 32px; justify-content: center; }
.service-card { flex: 1 1 360px; max-width: 520px; background: var(--cream); border: 1px solid var(--line); display: flex; flex-direction: column; }
.service-card.featured { border-color: var(--champagne); }
.service-image { height: 240px; overflow: hidden; background: #EBD9CF; }
.service-image picture { display: block; width: 100%; height: 100%; }
.service-image img { width: 100%; height: 100%; object-fit: cover; }
.service-body { padding: 40px; display: flex; flex-direction: column; gap: 16px; flex-grow: 1; }
.service-title-row { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; }
.service-name { font-family: var(--serif); font-weight: 500; font-size: 36px; letter-spacing: 0.04em; line-height: 1.2; }
.badge { font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; border: 1px solid var(--champagne); padding: 4px 12px; }
.service-duration { font-size: 14px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); }
.service-desc { color: var(--muted); flex-grow: 1; }
.service-foot { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px; border-top: 1px solid var(--line); padding-top: 16px; }
.service-price { font-family: var(--serif); font-size: 32px; font-weight: 500; }

/* Hero trust line */
.trust-line { font-size: 15px; color: var(--espresso); max-width: 480px; border-left: 1px solid var(--champagne); padding-left: 16px; margin-bottom: 16px; }

/* Concerns ("Chúng tôi hiểu") */
.section-cream-alt { background: var(--cream); border-top: 1px solid var(--line); }
.section-lead { margin-top: 24px; margin-bottom: 0; }
.concerns { display: flex; flex-wrap: wrap; gap: 24px; justify-content: center; }
.concern { flex: 1 1 340px; max-width: 384px; background: #FFFDFB; border: 1px solid var(--line); padding: 32px; }
.concern-q { font-family: var(--serif); font-style: italic; font-weight: 400; font-size: 24px; line-height: 1.3; margin-bottom: 16px; }

/* Services note */
.services-note { margin-top: 32px; }

/* First-time box in booking */
.first-time { border: 1px solid var(--champagne); background: var(--cream); padding: 24px 32px; margin: 0 auto 40px; max-width: 640px; }
.first-time-title { font-family: var(--serif); font-size: 24px; margin-bottom: 8px; }

/* Commitment */
.commitment { display: flex; flex-wrap: wrap; gap: 64px; }
.commitment-intro { flex: 1 1 340px; min-width: 0; }
.commitment-intro .heading { margin-bottom: 24px; }
.commitment-intro .on-dark-muted { max-width: 400px; }
.commitment-list { flex: 1 1 520px; min-width: 0; list-style: none; margin: 0; padding: 0; border-bottom: 1px solid #6B5A50; }
.commitment-item { display: flex; gap: 32px; padding: 28px 0; border-top: 1px solid #6B5A50; }
.commitment-num { font-family: var(--serif); font-size: 28px; color: #D9C3A5; min-width: 40px; line-height: 1.2; }
.commitment-title { font-family: var(--serif); font-weight: 500; font-size: 26px; margin-bottom: 8px; line-height: 1.2; }

/* Booking steps */
.steps { display: flex; flex-wrap: wrap; gap: 32px; margin-bottom: 56px; text-align: left; }
.step { flex: 1 1 240px; min-width: 0; border-top: 1px solid var(--champagne); padding-top: 24px; }
.step-title { font-family: var(--serif); font-size: 24px; margin-bottom: 8px; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); font-size: 15px; }
.footer-grid { display: flex; flex-wrap: wrap; gap: 48px; padding-top: 72px; padding-bottom: 40px; }
.footer-grid > div { flex: 1 1 200px; min-width: 0; }
.footer-grid > .footer-brand { flex: 2 1 300px; }
.footer-slogan { font-family: var(--serif); font-style: italic; font-size: 20px; color: var(--muted); }
.footer-label { font-size: 13px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); margin-bottom: 12px; }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; padding-top: 24px; padding-bottom: 24px; border-top: 1px solid var(--line); font-size: 13px; color: var(--muted); }
.footer-bottom a { color: var(--muted); }

/* Blog ("Kiến thức") */
.post-grid { display: flex; flex-wrap: wrap; gap: 32px; justify-content: center; }
.post-grid-more { margin-top: 48px; }
.post-card { flex: 1 1 320px; max-width: 384px; background: #FFFDFB; border: 1px solid var(--line); display: flex; flex-direction: column; }
.post-card-image { display: block; height: 200px; overflow: hidden; }
.post-card-image.placeholder { background: #EBD9CF; padding: 0; }
.post-card-image img { width: 100%; height: 100%; object-fit: cover; display: block; }
.post-card-body { padding: 28px 32px 32px; display: flex; flex-direction: column; gap: 12px; flex-grow: 1; }
.post-card-body .muted { flex-grow: 1; }
.post-topic { font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--rosewood); text-decoration: none; }
.post-card-title { font-family: var(--serif); font-weight: 500; font-size: 26px; line-height: 1.25; }
.post-card-title a { text-decoration: none; }
.post-date { font-size: 13px; color: var(--muted); }

.blog-hero { padding: 88px 0 72px; }
.blog-list { padding-top: 64px; }
.topic-chips { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-bottom: 48px; }
.chip { font-size: 13px; letter-spacing: 0.08em; text-decoration: none; border: 1px solid var(--champagne); padding: 8px 18px; }
.chip:hover { background: var(--blush); color: var(--espresso); }
.chip[aria-current="page"] { background: var(--espresso); border-color: var(--espresso); color: var(--cream); }
.nav a[aria-current="page"] { color: var(--rosewood); }

.post-header { padding: 88px 0 64px; }
.post-breadcrumb { font-size: 13px; letter-spacing: 0.12em; text-transform: uppercase; margin-bottom: 20px; color: var(--muted); }
.post-breadcrumb a { color: var(--muted); text-decoration: none; }
.post-title { margin-bottom: 16px; }
.post-cover { margin-top: 48px; }
.post-cover img { width: 100%; display: block; }

/* Article content written in Markdown */
.post-body { max-width: 680px; margin: 0 auto; padding: 64px 0 24px; font-size: 18px; }
.post-body > * + * { margin-top: 1.2em; }
.post-body h2 { font-family: var(--serif); font-weight: 500; font-size: 34px; line-height: 1.25; margin-top: 1.8em; }
.post-body h3 { font-family: var(--serif); font-weight: 500; font-size: 26px; line-height: 1.3; margin-top: 1.6em; }
.post-body a { color: var(--rosewood); }
.post-body strong { font-weight: 500; }
.post-body em { font-family: var(--serif); font-size: 1.2em; }
.post-body ul, .post-body ol { padding-left: 1.4em; }
.post-body li + li { margin-top: 0.4em; }
.post-body blockquote { margin-left: 0; margin-right: 0; padding-left: 24px; border-left: 1px solid var(--champagne); font-family: var(--serif); font-style: italic; font-size: 24px; color: var(--muted); }
.post-body img, .post-body iframe { max-width: 100%; display: block; }
.post-body iframe { width: 100%; aspect-ratio: 16 / 9; border: 0; }
.post-body figure { margin-left: 0; margin-right: 0; }
.post-body figcaption { font-size: 14px; color: var(--muted); margin-top: 8px; }
.post-body hr { border: 0; height: 1px; width: 64px; background: var(--champagne); margin: 48px auto; }
.post-body .note { background: var(--blush); border-left: 1px solid var(--champagne); padding: 20px 28px; }
.post-body .note > * + * { margin-top: 0.8em; }
/* Khối Kỹ thuật (Vị trí & Lực) trong bài viết */
.techniques { margin-top: 2.4em; margin-left: calc(50% - min(480px, 50vw - 24px)); margin-right: calc(50% - min(480px, 50vw - 24px)); font-size: 16px; }
.techniques-eyebrow { font-size: 14px; font-weight: 500; letter-spacing: 0.16em; text-transform: uppercase; color: var(--espresso); padding-bottom: 12px; border-bottom: 1px solid var(--champagne); margin-bottom: 32px; }
.post-body .techniques-heading { font-family: var(--serif); font-weight: 500; font-size: 30px; margin: 32px 0 16px; }
.tech-card { background: #EEECE8; padding: 40px 48px 28px; display: flex; flex-direction: column; gap: 28px; }
.tech-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 32px 48px; align-items: start; }
.tech-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; align-items: start; }
.tech-intro-row { align-items: center; }
.tech-stack { display: flex; flex-direction: column; gap: 24px; }
.tech-item h4 { font-family: var(--sans); font-weight: 500; font-size: 17px; color: var(--espresso); margin: 0 0 8px; }
.tech-item p { color: var(--muted); line-height: 1.65; }
.post-body .tech-quote { font-family: var(--serif); font-style: italic; font-size: 20px; line-height: 1.5; color: var(--muted); border-left: 2px solid var(--rosewood); padding-left: 20px; margin: 0; align-self: center; }
.tech-media { width: 100%; overflow: hidden; justify-content: center; align-items: center; }
.tech-media img { width: 100%; height: 100%; object-fit: cover; display: block; }
.tech-media-portrait { max-width: 260px; aspect-ratio: 3 / 4; margin: 0 auto; }
.tech-media-wide { max-width: 560px; aspect-ratio: 16 / 9; margin: 0 auto; }
.tech-details { display: flex; flex-direction: column; gap: 28px; }
.tech-details-body { display: flex; flex-direction: column; gap: 28px; }
.tech-toggle { order: 1; list-style: none; cursor: pointer; display: inline-flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 400; color: var(--rosewood); user-select: none; padding-top: 8px; border-top: 1px solid var(--line); }
.tech-toggle::-webkit-details-marker { display: none; }
.tech-toggle::after { content: '⌃'; font-size: 14px; line-height: 1; transition: transform .2s; }
.tech-details:not([open]) .tech-toggle::after { transform: rotate(180deg); }
.tech-details[open] .tech-toggle-closed, .tech-details:not([open]) .tech-toggle-open { display: none; }

/* Khối chọn video (Vị trí × Lực) trong bài viết */
.video-picker { display: grid; grid-template-columns: 2fr 3fr; gap: 48px; align-items: center; background: #EEECE8; padding: 48px 56px;
  margin-left: calc(50% - min(480px, 50vw - 24px)); margin-right: calc(50% - min(480px, 50vw - 24px)); } /* nền trùng nền video; rộng tối đa 960px */
.video-picker-media { position: relative; min-height: 240px; }
.video-picker-media video { display: block; max-width: 100%; max-height: 400px; margin: 0 auto; } /* giữ nguyên tỉ lệ video, không cắt */
.video-picker-missing { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; padding: 16px; text-align: center; font-size: 14px; color: var(--muted); }
.video-picker-missing[hidden] { display: none; }
.video-picker-options { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: start; }
.video-picker-group { display: flex; flex-direction: column; gap: 10px; }
.video-picker-label { font-family: var(--serif); font-weight: 500; font-size: 22px; }
.video-picker button { font: inherit; font-size: 15px; color: var(--espresso); background: var(--cream); border: 1px solid var(--line); padding: 12px 16px; cursor: pointer; transition: background .2s, border-color .2s; }
.video-picker button:hover { border-color: var(--champagne); }
.video-picker button[aria-pressed="true"] { background: var(--espresso); border-color: var(--espresso); color: var(--cream); }

.cta { max-width: 680px; margin: 48px auto 112px; border: 1px solid var(--champagne); background: var(--cream); padding: 32px; text-align: center; }
.cta-title { font-family: var(--serif); font-size: 28px; margin-bottom: 8px; }
.cta .btn-row { margin: 24px 0 0; }

/* Mobile */
@media (max-width: 640px) {
  .section { padding: 72px 0; }
  .hero { gap: 48px; padding-top: 56px; padding-bottom: 72px; }
  .hero-image { height: 360px; outline-offset: 10px; }
  .nav { gap: 16px 20px; }
  .service-body { padding: 28px; }
  .commitment-item { gap: 20px; }
  .post-body { font-size: 17px; padding-top: 48px; }
  .techniques { margin-left: 0; margin-right: 0; }
  .tech-card { padding: 24px 20px 20px; gap: 20px; }
  .tech-grid-2, .tech-grid-3 { grid-template-columns: 1fr; gap: 20px; }
  .tech-details, .tech-details-body { gap: 20px; }
  .video-picker { grid-template-columns: 1fr; gap: 24px; padding: 24px 16px; margin-left: 0; margin-right: 0; }
  .video-picker-options { gap: 16px; }
  .video-picker-media video { max-height: 50vh; }
  .post-card-body { padding: 24px; }
  .cta { padding: 24px; margin-bottom: 72px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn { transition: none; }
}

/* Nút liên hệ nổi – icon dùng màu logo chính thức của từng app (không theo palette site) */
.contact-fab { position: fixed; right: 20px; bottom: 24px; bottom: max(24px, env(safe-area-inset-bottom)); z-index: 50; }
.contact-fab summary { list-style: none; cursor: pointer; width: 56px; height: 56px; border-radius: 50%; display: flex; align-items: center; justify-content: center; background: var(--espresso); color: var(--cream); border: 1px solid var(--champagne); box-shadow: 0 2px 10px rgba(59, 47, 42, 0.25); }
.contact-fab summary::-webkit-details-marker { display: none; }
.contact-fab summary:hover { background: var(--rosewood); }
.contact-fab summary:focus-visible, .fab-link:focus-visible { outline: 2px solid var(--champagne); outline-offset: 3px; }
.contact-fab summary svg { width: 26px; height: 26px; }
.contact-fab .fab-close, .contact-fab details[open] .fab-chat { display: none; }
.contact-fab details[open] .fab-close { display: block; }
.contact-fab ul { list-style: none; margin: 0; padding: 0; position: absolute; right: 4px; bottom: 68px; display: flex; flex-direction: column; gap: 12px; align-items: flex-end; }
.fab-link { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.fab-name { font-size: 13px; background: var(--cream); color: var(--espresso); border: 1px solid var(--champagne); padding: 4px 12px; white-space: nowrap; }
.fab-icon { width: 48px; height: 48px; border-radius: 50%; display: flex; align-items: center; justify-content: center; box-shadow: 0 2px 8px rgba(59, 47, 42, 0.25); flex: none; }
.fab-icon svg { width: 26px; height: 26px; }
.fab-zalo .fab-icon { background: #0068FF; }
.fab-zalo .fab-icon svg { width: 30px; height: 30px; }
.fab-phone .fab-icon { background: #2E9E5B; }
.fab-whatsapp .fab-icon { background: #25D366; }
.fab-telegram .fab-icon { background: #229ED9; }
.fab-instagram .fab-icon { background: radial-gradient(circle at 30% 107%, #FED576 0%, #F47133 26%, #BC3081 55%, #4C63D2 100%); }
.fab-link:hover .fab-icon { transform: scale(1.06); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
@media (prefers-reduced-motion: no-preference) { .fab-icon { transition: transform 0.15s; } }
@media (max-width: 640px) { .contact-fab { right: 14px; bottom: 18px; bottom: max(18px, env(safe-area-inset-bottom)); } }