/* ===== Màu sắc (mặc định: tối) ===== */
:root {
  --bg: #0a0a0a;
  --card: #131313;
  --card-2: #1b1b1b;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);
  --text: #f2f2f2;
  --muted: #9a9a9a;
  --faint: #7a7a7a;
  /* Màu nhấn đơn sắc: luôn là màu chữ của theme — trắng ở giao diện tối, đen ở giao diện sáng */
  --accent: var(--text);
  --green: #22c55e;
  --amber: #f59e0b;
  --btn-primary-bg: #f2f2f2;
  --btn-primary-fg: #0a0a0a;
  --shadow: 0 1px 0 rgba(255, 255, 255, 0.03) inset;
  --ring: 0 0 0 2px var(--bg), 0 0 0 4px var(--accent);

  --font-body: "Be Vietnam Pro", system-ui, -apple-system, sans-serif;
  --font-display: "Chakra Petch", var(--font-body);
  color-scheme: dark;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f7f7f6;
    --card: #ffffff;
    --card-2: #f1f1f0;
    --border: rgba(0, 0, 0, 0.08);
    --border-strong: rgba(0, 0, 0, 0.18);
    --text: #111111;
    --muted: #5f5f5f;
    --faint: #767676;
    --green: #16a34a;
    --amber: #b45309;
    --btn-primary-bg: #111111;
    --btn-primary-fg: #ffffff;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
    color-scheme: light;
  }
}

:root[data-theme="light"] {
  --bg: #f7f7f6;
  --card: #ffffff;
  --card-2: #f1f1f0;
  --border: rgba(0, 0, 0, 0.08);
  --border-strong: rgba(0, 0, 0, 0.18);
  --text: #111111;
  --muted: #5f5f5f;
  --faint: #767676;
  --green: #16a34a;
  --amber: #b45309;
  --btn-primary-bg: #111111;
  --btn-primary-fg: #ffffff;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
  color-scheme: light;
}

/* ===== Nền tảng ===== */
*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; -webkit-tap-highlight-color: transparent; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background-color .25s, color .25s;
}

a { color: inherit; text-decoration: none; }
a, button { touch-action: manipulation; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}
svg { display: block; }
h1, h2, h3, p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

:focus-visible { outline: none; box-shadow: var(--ring); border-radius: 8px; }

.skip {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 20;
  padding: 8px 12px;
  border-radius: 8px;
  background: var(--btn-primary-bg);
  color: var(--btn-primary-fg);
  font-weight: 600;
}
.skip:focus { top: 16px; }

.page {
  max-width: 600px;
  margin: 0 auto;
  padding: 80px 16px 40px;
}

/* ===== Nút đổi theme (cuộn theo trang, không đè nội dung) ===== */
.theme-toggle {
  position: absolute;
  top: 16px;
  right: 16px;
  z-index: 10;
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  cursor: pointer;
  transition: border-color .2s;
}
.theme-toggle:hover { border-color: var(--border-strong); }
.theme-toggle svg { width: 18px; height: 18px; }
/* Icon trên nút cho biết chế độ đang dùng: nửa tròn = Tự động, mặt trời = Sáng, mặt trăng = Tối */
:is(.theme-toggle, .a-theme) :is(.icon-sun, .icon-moon) { display: none; }
:root[data-mode="light"] :is(.theme-toggle, .a-theme) .icon-sun,
:root[data-mode="dark"] :is(.theme-toggle, .a-theme) .icon-moon { display: block; }
:root[data-mode="light"] :is(.theme-toggle, .a-theme) .icon-auto,
:root[data-mode="dark"] :is(.theme-toggle, .a-theme) .icon-auto { display: none; }
.theme-mode-label::before { content: ": Tự động"; }
:root[data-mode="light"] .theme-mode-label::before { content: ": Sáng"; }
:root[data-mode="dark"] .theme-mode-label::before { content: ": Tối"; }

/* ===== Phần đầu ===== */
.hero { text-align: center; }

.avatar {
  width: 88px;
  height: 88px;
  margin: 0 auto 16px;
  border-radius: 50%;
  padding: 3px;
  background: var(--card);
  border: 1px solid var(--border-strong);
}
.avatar img, .avatar span {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
}
.avatar span {
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--btn-primary-fg);
  background: var(--btn-primary-bg);
}

.name, .section-head h2, .contact h2 { text-wrap: balance; }
.bio, .section-head p, .contact p { text-wrap: pretty; }

.name {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: .3px;
}
.role {
  margin-top: 4px;
  font-size: 14px;
  color: var(--muted);
}
.verified { width: 22px; height: 22px; flex: none; }
.role { display: flex; align-items: center; justify-content: center; gap: 5px; }
.role svg { width: 15px; height: 15px; flex: none; }
.bio {
  max-width: 460px;
  margin: 16px auto 0;
  font-size: 16px;
  color: var(--muted);
}
.bio strong { color: var(--text); font-weight: 600; }

.roles {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-top: 20px;
}
.roles li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  font-size: 13px;
  font-weight: 500;
  border-radius: 999px;
  background: var(--card);
  border: 1px solid var(--border);
}
.roles svg { width: 14px; height: 14px; color: var(--muted); }

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 24px;
}

.socials {
  display: flex;
  justify-content: center;
  gap: 6px;
  margin-top: 20px;
}
.socials a {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  color: var(--muted);
  transition: color .2s, background-color .2s;
}
.socials a:hover { color: var(--text); background: var(--card-2); }
.socials svg { width: 18px; height: 18px; }

/* ===== Section ===== */
.section { margin-top: 64px; scroll-margin-top: 24px; }
#cong-cu { scroll-margin-top: 24px; }
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}
.section-head h2 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.25;
}
.section-head p { max-width: 460px; margin-top: 6px; font-size: 14px; line-height: 1.6; color: var(--muted); }

/* ===== Nút ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 36px;
  padding: 0 14px;
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  color: var(--text);
  border-radius: 10px;
  background: var(--card);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: border-color .2s, opacity .2s, background-color .2s;
}
.btn:hover { border-color: var(--border-strong); }
.btn svg { width: 15px; height: 15px; }
.btn-primary { background: var(--btn-primary-bg); color: var(--btn-primary-fg); border-color: transparent; }
.btn-primary:hover { opacity: .88; border-color: transparent; }
.btn-lg { height: 44px; padding: 0 20px; font-size: 15px; }
.btn-sm { height: 30px; padding: 0 10px; font-size: 13px; border-radius: 8px; }
.btn-sm svg { width: 13px; height: 13px; }
.btn-block { width: 100%; }

/* ===== Bộ lọc dạng segmented ===== */
.seg {
  display: inline-flex;
  flex: none;
  padding: 3px;
  border-radius: 10px;
  background: var(--card);
  border: 1px solid var(--border);
}
.seg button {
  height: 30px;
  padding: 0 12px;
  font: inherit;
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  background: transparent;
  border: 0;
  border-radius: 7px;
  cursor: pointer;
  transition: background-color .2s, color .2s;
}
.seg button:hover { color: var(--text); }
.seg button[aria-pressed="true"] { background: var(--card-2); color: var(--text); box-shadow: 0 0 0 1px var(--border); }

/* ===== Ứng dụng & công cụ ===== */
.tools {
  overflow: hidden;
  border-radius: 16px;
  background: var(--card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.tool {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  border-top: 1px solid var(--border);
  transition: background-color .2s;
  animation: fade .3s ease both;
}
.tool:first-child { border-top: 0; }

.tool:hover { background: var(--card-2); }
.tool:hover .btn-sm { border-color: var(--border-strong); }
.tool-icon {
  width: 44px;
  height: 44px;
  flex: none;
  align-self: flex-start;
  border-radius: 11px;
  object-fit: cover;
}
img.tool-icon { background: #fff; border: 1px solid var(--border); }
.icon-letter {
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--c), color-mix(in srgb, var(--c) 60%, #000));
}
.tool-text { flex: 1; min-width: 0; line-height: 1.45; overflow-wrap: anywhere; }
.tool-name { display: flex; align-items: center; flex-wrap: wrap; gap: 4px 8px; }
.tool-name strong { font-size: 15px; font-weight: 600; }
.tool-text small { display: block; margin-top: 2px; font-size: 13.5px; color: var(--muted); }
.platforms { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 9px; }
.pf {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 2px 7px 2px 6px;
  font-size: 12px;
  font-weight: 500;
  color: var(--muted);
  border-radius: 6px;
  background: var(--card-2);
  border: 1px solid var(--border);
}
.tool:hover .pf { background: var(--card); }
.pf svg { width: 12px; height: 12px; flex: none; }
.pf-stat {
  color: var(--green);
  border-color: color-mix(in srgb, var(--green) 30%, transparent);
  background: color-mix(in srgb, var(--green) 9%, transparent);
}
.tool:hover .pf-stat { background: color-mix(in srgb, var(--green) 9%, transparent); }

.tool-side { display: flex; align-items: center; flex: none; }
.tool-side .go { display: none; }
.tool:hover .go { color: var(--text); }

.price {
  padding: 1px 7px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 6px;
  border: 1px solid transparent;
  white-space: nowrap;
}
.price-free { color: var(--green); background: color-mix(in srgb, var(--green) 10%, transparent); border-color: color-mix(in srgb, var(--green) 28%, transparent); }
.price-paid { color: var(--amber); background: color-mix(in srgb, var(--amber) 10%, transparent); border-color: color-mix(in srgb, var(--amber) 30%, transparent); }
.price-freemium { color: var(--accent); background: color-mix(in srgb, var(--accent) 10%, transparent); border-color: color-mix(in srgb, var(--accent) 30%, transparent); }

.empty { padding: 28px 0; text-align: center; color: var(--muted); font-size: 14px; }

/* ===== Công việc ===== */
.company {
  padding: 20px;
  border-radius: 16px;
  background:
    radial-gradient(120% 100% at 0% 0%, color-mix(in srgb, var(--text) 6%, transparent), transparent 55%),
    var(--card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.company-head { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; }
.company-logo { width: 52px; height: 52px; flex: none; border-radius: 13px; object-fit: cover; }
.company-title { flex: 1; min-width: 0; line-height: 1.35; }
.company-title h3 { font-family: var(--font-display); font-size: 19px; font-weight: 700; }
.company-title p { font-size: 13.5px; color: var(--muted); }
.company-link { display: inline-flex; align-items: center; gap: 4px; }
.company-link svg { width: 15px; height: 15px; color: var(--faint); transition: color .2s, transform .2s; }
.company-link:hover svg { color: var(--text); transform: translate(2px, -2px); }
.company-time {
  flex: none;
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  color: var(--muted);
}
.company-time::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--green); }


/* ===== Liên hệ ===== */
.contact {
  margin-top: 64px;
  padding: 28px 24px 24px;
  text-align: center;
  border-radius: 16px;
  background:
    radial-gradient(100% 120% at 50% 0%, color-mix(in srgb, var(--accent) 14%, transparent), transparent 65%),
    var(--card);
  border: 1px solid var(--border);
  scroll-margin-top: 24px;
}
.contact h2 { font-family: var(--font-display); font-size: 22px; font-weight: 700; line-height: 1.3; }
.contact p { max-width: 420px; margin: 8px auto 0; color: var(--muted); font-size: 14.5px; }

.email-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  max-width: 360px;
  margin: 20px auto 12px;
  padding: 6px 6px 6px 14px;
  border-radius: 12px;
  background: var(--bg);
  border: 1px solid var(--border);
}
.email-addr { font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.contact .btn-block { max-width: 360px; }
.contact-alt { display: flex; gap: 10px; max-width: 360px; margin: 10px auto 0; }
.contact-alt .btn { flex: 1; min-width: 0; }
.contact-alt .btn svg { width: 17px; height: 17px; }
.btn.copied { color: var(--green); border-color: color-mix(in srgb, var(--green) 40%, transparent); }

.footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 40px;
  font-size: 13px;
  color: var(--faint);
}
.footer a { padding: 6px 2px; }
.footer a:hover { color: var(--text); }

/* ===== Màn hình cảm ứng: nút lớn hơn cho dễ bấm ===== */
@media (pointer: coarse) {
  .seg button { height: 38px; }
  .btn-sm { height: 36px; }
  .socials a { width: 44px; height: 44px; }
}

/* ===== Trang chi tiết sản phẩm ===== */
.page-detail { padding-top: 24px; }

.crumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  min-height: 38px;
  padding-right: 48px;
  font-size: 13.5px;
  color: var(--faint);
}
.crumbs a { display: inline-flex; align-items: center; gap: 4px; padding: 6px 0; color: var(--muted); transition: color .2s; }
.crumbs a:hover { color: var(--text); }
.crumbs svg { width: 16px; height: 16px; }

.d-hero { margin-top: 28px; text-align: center; }
.d-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 16px;
  border-radius: 18px;
  object-fit: cover;
  border: 1px solid var(--border);
  box-shadow: 0 8px 24px rgba(0, 0, 0, .2);
}
img.d-icon { background: #fff; }
.d-icon.icon-letter { font-size: 30px; }
.d-hero h1 { font-family: var(--font-display); font-size: 32px; font-weight: 700; line-height: 1.2; text-wrap: balance; }
.d-tagline { max-width: 460px; margin: 10px auto 0; font-size: 16px; color: var(--muted); text-wrap: pretty; }
.d-meta { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 8px; margin-top: 16px; }
.d-version { font-size: 12.5px; color: var(--faint); }
.d-hero .platforms { justify-content: center; margin-top: 10px; }

.d-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 24px;
  scroll-margin-top: 24px;
}
.d-actions .btn svg { width: 16px; height: 16px; }
.btn-pro {
  color: var(--accent);
  border-color: color-mix(in srgb, var(--accent) 35%, transparent);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
}
.btn-pro:hover { border-color: var(--accent); }

.d-shot {
  margin: 40px 0 0;
  overflow: hidden;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--card-2);
  box-shadow: 0 20px 50px rgba(0, 0, 0, .25);
}
.d-shot img { display: block; width: 100%; height: auto; }

.prose p { color: var(--muted); font-size: 15.5px; text-wrap: pretty; }
.prose p + p { margin-top: 12px; }

.checklist { margin: 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.checklist li { display: flex; gap: 10px; align-items: flex-start; font-size: 14.5px; line-height: 1.5; }
.checklist svg { width: 18px; height: 18px; flex: none; margin-top: 2px; color: var(--green); }
.checklist-card {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  padding: 18px;
  border-radius: 16px;
  background: var(--card);
  border: 1px solid var(--border);
}

.plans { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.plans-1 { grid-template-columns: 1fr; }
.plan {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 20px;
  border-radius: 16px;
  background: var(--card);
  border: 1px solid var(--border);
}
.plan-pro { border-color: color-mix(in srgb, var(--accent) 45%, transparent); box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent) 20%, transparent); }
.plan-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.plan-name { font-family: var(--font-display); font-size: 17px; font-weight: 700; }
.plan-price { font-family: var(--font-display); font-size: 24px; font-weight: 700; font-variant-numeric: tabular-nums; }
.plan-sub { font-size: 13px; color: var(--muted); margin-top: -6px; }
.plan .checklist { flex: 1; }
.plan .checklist li { font-size: 14px; }
.price-note { margin-top: 12px; font-size: 13px; color: var(--muted); text-align: center; text-wrap: pretty; }

.faq { border-radius: 16px; background: var(--card); border: 1px solid var(--border); }
.faq details + details { border-top: 1px solid var(--border); }
.faq summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  font-weight: 600;
  font-size: 14.5px;
  cursor: pointer;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; flex: none; font-size: 20px; line-height: 1; color: var(--faint); transition: transform .2s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { padding: 0 18px 16px; margin-top: -4px; font-size: 14px; color: var(--muted); }

/* ===== Nhiều nơi làm việc ===== */
.companies { display: grid; gap: 12px; }
.company-time.is-past::before { background: var(--faint); }

/* ===== Blog ===== */
.section-head-row { align-items: center; }
.more-link {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 6px 0;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--muted);
  transition: color .2s;
}
.more-link:hover { color: var(--text); }
.more-link svg { width: 15px; height: 15px; }

.posts {
  overflow: hidden;
  border-radius: 16px;
  background: var(--card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.post-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  border-top: 1px solid var(--border);
  transition: background-color .2s;
}
.post-row:first-child { border-top: 0; }
.post-row:hover { background: var(--card-2); }
.post-row-text { flex: 1; min-width: 0; line-height: 1.45; overflow-wrap: anywhere; }
.post-row strong { display: block; font-size: 15px; font-weight: 600; text-wrap: pretty; }
.post-row small { display: block; margin-top: 3px; font-size: 13.5px; color: var(--muted); }
.post-row time { display: block; margin-top: 6px; font-size: 12.5px; color: var(--faint); font-variant-numeric: tabular-nums; }
.post-row .go { width: 18px; height: 18px; flex: none; color: var(--faint); transition: color .2s, transform .2s; }
.post-row:hover .go { color: var(--text); transform: translateX(2px); }

.blog-head { margin: 28px 0 24px; }
.blog-head h1, .post-head h1 { font-family: var(--font-display); font-weight: 700; line-height: 1.2; text-wrap: balance; }
.blog-head h1 { font-size: 32px; }
.blog-title { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.blog-title .more-link { gap: 5px; }
.blog-head p { margin-top: 8px; color: var(--muted); text-wrap: pretty; }

.pager { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 20px; }
.pager-info { font-size: 13px; color: var(--faint); }

.post { margin-top: 28px; }
.post-head h1 { font-size: 32px; }
.post-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; font-size: 13.5px; color: var(--faint); }
.post-cover {
  margin: 28px 0 0;
  overflow: hidden;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--card-2);
}
.post-cover img { display: block; width: 100%; height: auto; }
.post-body { margin-top: 28px; }
.post-foot { margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--border); }

/* Nội dung soạn bằng Markdown */
.prose { overflow-wrap: break-word; }
.prose > * + * { margin-top: 12px; }
.prose a { color: var(--text); font-weight: 500; text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; }
.prose strong { color: var(--text); font-weight: 600; }
.prose h2, .prose h3, .prose h4 { font-family: var(--font-display); font-weight: 700; line-height: 1.3; color: var(--text); scroll-margin-top: 24px; }
.prose h2 { margin-top: 32px; font-size: 22px; }
.prose h3 { margin-top: 26px; font-size: 18px; }
.prose h4 { margin-top: 22px; font-size: 16px; }
.prose ul, .prose ol { padding-left: 22px; color: var(--muted); font-size: 15.5px; }
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li + li { margin-top: 4px; }
.prose li::marker { color: var(--faint); }
.prose blockquote { margin: 16px 0 0; padding: 2px 0 2px 16px; border-left: 3px solid var(--border-strong); }
.prose blockquote p { font-style: italic; }
.prose hr { margin: 28px 0; border: 0; border-top: 1px solid var(--border); }
.prose img { display: block; max-width: 100%; height: auto; margin: 0 auto; border-radius: 12px; border: 1px solid var(--border); }
.prose code { padding: 1px 6px; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .88em; border-radius: 6px; background: var(--card-2); border: 1px solid var(--border); color: var(--text); }
.prose pre { overflow-x: auto; padding: 14px 16px; border-radius: 12px; background: var(--card); border: 1px solid var(--border); font-size: 13.5px; line-height: 1.55; }
.prose pre code { padding: 0; border: 0; background: none; font-size: inherit; }
.prose .table-wrap { overflow-x: auto; border-radius: 12px; border: 1px solid var(--border); }
.prose table { width: 100%; border-collapse: collapse; font-size: 14px; color: var(--muted); }
.prose th, .prose td { padding: 9px 12px; text-align: left; border-top: 1px solid var(--border); }
.prose thead th { border-top: 0; color: var(--text); font-weight: 600; background: var(--card); }

/* Bài blog dài: chữ đậm hơn một chút cho dễ đọc */
.post-body p, .post-body ul, .post-body ol { color: color-mix(in srgb, var(--text) 82%, var(--bg)); font-size: 16px; line-height: 1.75; }
.post-body > * + * { margin-top: 16px; }

/* ===== Trang lỗi ===== */
.error-page { min-height: 100vh; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px; text-align: center; }
.error-code { font-family: var(--font-display); font-size: 56px; font-weight: 700; line-height: 1; color: var(--faint); }
.error-page h1 { font-family: var(--font-display); font-size: 24px; }
.error-page p { color: var(--muted); }
.error-page .btn { margin-top: 14px; }
.error-detail { max-width: 100%; overflow-x: auto; margin-top: 20px; padding: 12px; text-align: left; font-size: 12px; border-radius: 10px; background: var(--card); border: 1px solid var(--border); }

/* ===== Hiệu ứng ===== */
/* Chỉ ẩn khi JS chạy — nếu JS lỗi, nội dung vẫn hiện */
.js .reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.js .reveal.in { opacity: 1; transform: none; }

@keyframes fade { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
  .tool { animation: none; }
}

/* ===== Điện thoại ===== */
@media (max-width: 560px) {
  .page { padding-top: 72px; }
  .name { font-size: 27px; }
  .bio { font-size: 15px; }
  .hero-actions .btn { flex: 1; }
  .section { margin-top: 52px; }
  .section-head { flex-direction: column; align-items: stretch; }
  .seg { display: flex; }
  .seg button { flex: 1; }
  /* Công cụ: cả dòng là link, bỏ nút, thay bằng mũi tên */
  .tool { padding: 14px; gap: 12px; }
  .tool-icon { width: 40px; height: 40px; }
  .tool-side { align-self: flex-start; padding-top: 2px; }
  .tool-side .btn { display: none; }
  .tool-side .go { display: block; }
  .d-hero h1 { font-size: 28px; }
  .d-actions .btn { flex: 1 1 100%; }
  .checklist-card { grid-template-columns: 1fr; }
  .plans { grid-template-columns: 1fr; }
  .company { padding: 16px; }
  .company-time { order: 3; flex-basis: 100%; margin-top: -6px; padding-left: 58px; }
  .company-logo { width: 44px; height: 44px; }
  .section-head-row { flex-direction: row; align-items: center; }
  .list-more .btn { flex: 1; height: 44px; }
  .post-row { padding: 14px; }
  .blog-head h1, .post-head h1 { font-size: 28px; }
}


/* ===== Thanh "Bản xem trước" (chỉ admin thấy) ===== */
.preview-bar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 6px 14px;
  padding: 9px 16px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--amber);
  background: color-mix(in srgb, var(--amber) 14%, var(--bg));
  border-bottom: 1px solid color-mix(in srgb, var(--amber) 35%, transparent);
}
.preview-bar a { display: inline-flex; align-items: center; gap: 5px; color: var(--text); text-decoration: underline; text-underline-offset: 3px; }
.preview-bar svg { width: 14px; height: 14px; }
body:has(.preview-bar) .theme-toggle { display: none; }

/* ===== Thẻ bài viết ===== */
.tag-list { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 16px; }
.tag-list a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 30px;
  padding: 0 11px;
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  border-radius: 999px;
  background: var(--card);
  border: 1px solid var(--border);
  transition: color .2s, border-color .2s;
}
.tag-list a:hover { color: var(--text); border-color: var(--border-strong); }
.tag-list a[aria-current="page"] { color: var(--text); background: var(--card-2); border-color: var(--border-strong); }
.tag-list a span { font-size: 11.5px; color: var(--faint); font-variant-numeric: tabular-nums; }
.post-tags { margin-top: 28px; }

/* ===== Băng chuyền ảnh chụp màn hình ===== */
.d-gallery { margin-top: 40px; }
.d-gallery-track {
  display: flex;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
  border-radius: 14px;
  overscroll-behavior-x: contain;
}
.d-gallery-track::-webkit-scrollbar { display: none; }
.d-gallery-track:focus-visible { box-shadow: var(--ring); }
.d-gallery .d-shot { flex: 0 0 100%; margin: 0; scroll-snap-align: start; box-shadow: none; }
.d-gallery .d-shot a { display: block; }
.d-gallery-nav { display: flex; align-items: center; justify-content: center; gap: 12px; margin-top: 12px; }
.d-gallery-nav .btn { width: 30px; padding: 0; }
.d-gallery-nav .btn:disabled { opacity: .35; cursor: default; }
.d-gallery-count { min-width: 48px; text-align: center; font-size: 13px; color: var(--muted); font-variant-numeric: tabular-nums; }

/* ===== Ảnh đại diện riêng cho giao diện sáng / tối ===== */
.avatar .avatar-light { display: none; }
:root[data-theme="light"] .avatar .avatar-light { display: block; }
:root[data-theme="light"] .avatar .avatar-dark { display: none; }
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .avatar .avatar-light { display: block; }
  :root:not([data-theme="dark"]) .avatar .avatar-dark { display: none; }
}

/* ===== Tiện ích: icon công cụ (trang chủ, danh sách, trang công cụ) ===== */
.tl-icon {
  display: grid;
  place-items: center;
  flex: none;
  color: var(--text);
  border-radius: 11px;
  background: var(--card-2);
  border: 1px solid var(--border);
}
.tl-icon svg { width: 22px; height: 22px; }
.tl-icon-lg { width: 56px; height: 56px; border-radius: 14px; }
.tl-icon-lg svg { width: 26px; height: 26px; }
.tool .tl-icon svg { width: 20px; height: 20px; }

.tl-group + .tl-group { margin-top: 40px; }

/* Trang danh sách (/san-pham/, /tien-ich/): tab dưới tiêu đề */
.list-head { display: grid; gap: 20px; }
.list-head .seg { justify-self: start; }
@media (max-width: 560px) { .list-head .seg { justify-self: stretch; } }
.list-body, .tl-groups { margin-top: 32px; }
/* Đang lọc một nhóm thì ẩn tiêu đề nhóm (tab đã nói rồi) */
.tl-groups > .tl-group:first-child { margin-top: 0; }
.tl-groups.is-filtered .tl-group-head { display: none; }

/* Nút "Xem tất cả" dưới danh sách */
.list-more { display: flex; justify-content: center; margin-top: 14px; }
.list-more .btn svg { width: 15px; height: 15px; margin-right: -4px; }