/* =========================================================
   ZHR GLOBAL — COMPONENTS
   ========================================================= */

/* ---------- Buttons ------------------------------------- */
.btn {
  --btn-bg: var(--c-ink);
  --btn-fg: #fff;
  --btn-bd: var(--c-ink);
  display: inline-flex; align-items: center; gap: 10px;
  padding: 0.85rem 1.4rem;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--btn-fg);
  background: var(--btn-bg);
  border: 1px solid var(--btn-bd);
  border-radius: var(--radius-sm);
  transition: transform var(--dur-fast) var(--ease),
              background var(--dur) var(--ease),
              color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}
.btn__arrow { transition: transform var(--dur) var(--ease); }
.btn:hover { transform: translateY(-2px); }
.btn:hover .btn__arrow { transform: translateX(4px); }
.btn:active { transform: translateY(0); }

.btn--primary { --btn-bg: var(--c-accent); --btn-bd: var(--c-accent); }
.btn--primary:hover { --btn-bg: var(--c-accent-deep); --btn-bd: var(--c-accent-deep); }

.btn--ghost { --btn-bg: transparent; --btn-fg: var(--c-ink); --btn-bd: var(--c-line-strong); }
.btn--ghost:hover { --btn-bd: var(--c-ink); }

.btn--on-dark { --btn-bg: #fff; --btn-fg: var(--c-ink); --btn-bd: #fff; }
.btn--on-dark:hover { --btn-bg: var(--c-accent-bright); --btn-bd: var(--c-accent-bright); --btn-fg: var(--c-ink); }

.btn--ghost-dark { --btn-bg: transparent; --btn-fg: var(--c-on-dark); --btn-bd: var(--c-on-dark-line); }
.btn--ghost-dark:hover { --btn-bd: var(--c-on-dark); }

.btn--sm { padding: 0.55rem 1rem; font-size: var(--text-label); }

.btn-row { display: flex; flex-wrap: wrap; gap: var(--space-3); }

/* Text link có gạch chân động */
.link-arrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-display);
  font-size: var(--text-sm); font-weight: 600;
  color: var(--c-accent-deep);
  padding-bottom: 2px;
  background-image: linear-gradient(currentColor, currentColor);
  background-size: 0% 1px; background-repeat: no-repeat; background-position: 0 100%;
  transition: background-size var(--dur) var(--ease);
}
.link-arrow:hover { background-size: 100% 1px; }
.section--dark .link-arrow { color: var(--c-accent-bright); }

/* ---------- Header -------------------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  height: var(--header-h);
  display: flex; align-items: center;
  background: rgba(251, 250, 248, 0.86);
  backdrop-filter: saturate(1.6) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.site-header.is-stuck { border-bottom-color: var(--c-line); }
.site-header .wrap { display: flex; align-items: center; gap: var(--space-5); }

.brand { display: flex; align-items: center; gap: 10px; margin-right: auto; }
.brand__mark { width: 30px; height: 30px; flex: none; }
.brand__name {
  font-family: var(--font-display); font-weight: 700;
  font-size: 1.05rem; letter-spacing: 0.02em; color: var(--c-ink);
}
.brand__name span { color: var(--c-accent); }

.nav { display: flex; align-items: center; gap: clamp(0.6rem, 1.4vw, 1.6rem); }
.nav__link {
  position: relative;
  font-size: var(--text-sm); font-weight: 500; color: var(--c-text);
  padding: 6px 0;
  white-space: nowrap;
  transition: color var(--dur) var(--ease);
}
.nav__link::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 2px; width: 100%;
  background: var(--c-accent); transform: scaleX(0); transform-origin: left;
  transition: transform var(--dur) var(--ease);
}
.nav__link:hover { color: var(--c-ink); }
.nav__link:hover::after, .nav__link[aria-current="page"]::after { transform: scaleX(1); }
.nav__link[aria-current="page"] { color: var(--c-ink); font-weight: 600; }

.header__actions { display: flex; align-items: center; gap: var(--space-3); }
.header__actions .btn { white-space: nowrap; }
.nav > .btn { white-space: nowrap; }

/* Chuyển ngôn ngữ */
/* Chuyển ngôn ngữ: pill nhỏ, các nút cùng kích thước, không phá viền */
.lang-switch {
  display: inline-flex; align-items: center;
  padding: 3px;
  background: var(--c-paper-2);
  border: 1px solid var(--c-line);
  border-radius: 8px;
  gap: 2px;
}
.lang-switch button {
  min-width: 34px; height: 26px;
  padding: 0 10px;
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-body);
  font-size: var(--text-micro); font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--c-text-muted);
  background: transparent;
  border-radius: 5px;
  line-height: 1;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.lang-switch button:hover { color: var(--c-ink); }
.lang-switch button[aria-pressed="true"] {
  background: var(--c-surface);
  color: var(--c-ink);
  box-shadow: 0 1px 2px rgba(7, 26, 43, 0.08);
}

.nav-toggle { display: none; width: 42px; height: 42px; align-items: center; justify-content: center; }
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: ""; display: block; width: 20px; height: 1.5px; background: var(--c-ink);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.nav-toggle span::before { transform: translateY(-6px); }
.nav-toggle span::after  { transform: translateY(4.5px); }
.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after  { transform: rotate(-45deg) translateY(0); }

@media (max-width: 1240px) {
  .nav-toggle { display: inline-flex; }
  .nav {
    position: fixed; inset: var(--header-h) 0 auto 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--c-paper); border-bottom: 1px solid var(--c-line);
    padding: var(--space-4) var(--gutter) var(--space-6);
    transform: translateY(-12px); opacity: 0; pointer-events: none;
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
    max-height: calc(100dvh - var(--header-h)); overflow-y: auto;
  }
  .nav.is-open { transform: none; opacity: 1; pointer-events: auto; }
  .nav__link { padding: 14px 0; border-bottom: 1px solid var(--c-line); font-size: 1.05rem; }
  .nav__link::after { display: none; }
  .header__actions .btn { display: none; }
  .nav .btn { display: inline-flex; margin-top: var(--space-4); justify-content: center; }
}
@media (min-width: 1241px) { .nav > .btn { display: none; } }

/* ---------- Footer -------------------------------------- */
.site-footer { background: var(--c-ink); color: var(--c-on-dark); padding-block: var(--space-8) var(--space-6); }
.site-footer h4 { color: var(--c-on-dark); font-size: var(--text-label); letter-spacing: var(--track-label); text-transform: uppercase; }
.footer__grid {
  display: grid; grid-template-columns: minmax(0, 1.4fr) repeat(3, minmax(0, 1fr));
  gap: clamp(1.5rem, 4vw, 3rem);
  padding-bottom: var(--space-7); border-bottom: 1px solid var(--c-on-dark-line);
}
.footer__grid .brand__name { color: #fff; }
.footer__tagline { color: var(--c-on-dark-muted); font-size: var(--text-sm); margin-top: var(--space-3); max-width: 34ch; }
.footer__list li { margin-top: 10px; }
.footer__list a { font-size: var(--text-sm); color: var(--c-on-dark-muted); transition: color var(--dur) var(--ease); }
.footer__list a:hover { color: var(--c-accent-bright); }
.footer__bottom {
  display: flex; flex-wrap: wrap; gap: var(--space-4); justify-content: space-between;
  padding-top: var(--space-5); font-size: var(--text-sm); color: var(--c-on-dark-muted);
}
@media (max-width: 860px) { .footer__grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .footer__grid { grid-template-columns: 1fr; } }

/* ---------- Card system --------------------------------- */
.card {
  position: relative;
  display: flex; flex-direction: column; gap: var(--space-3);
  padding: clamp(1.35rem, 2.4vw, 2rem);
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.card__num {
  font-family: var(--font-display); font-size: var(--text-micro); font-weight: 700;
  letter-spacing: var(--track-label); color: var(--c-accent-deep);
}
.card__title { font-size: var(--text-h4); }
.card p { color: var(--c-text-muted); font-size: var(--text-sm); }
.card--link {
  cursor: pointer;
  will-change: transform;
}
.card--link:hover {
  transform: translateY(-6px);
  box-shadow: 0 28px 60px -28px rgba(7, 26, 43, 0.38);
  border-color: var(--c-accent);
}
.card--link:hover .card__title { color: var(--c-accent-deep); }
.card--dark.card--link:hover .card__title { color: var(--c-accent-bright); }
.card--link:hover .card__cta { color: var(--c-accent-deep); }
.card--link:hover .card__cta .btn__arrow { transform: translateX(4px); }
.card__cta {
  margin-top: auto; padding-top: var(--space-4);
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-display); font-size: var(--text-sm); font-weight: 600; color: var(--c-ink);
  transition: color var(--dur) var(--ease);
}
.card__cta .btn__arrow { transition: transform var(--dur) var(--ease); }
/* Vệt accent ở cạnh trên khi hover */
.card--accent::before {
  /* Disabled: remove the thin top accent bar; prefer full-card border glow on hover */
  display: none;
}

/* Stronger "light up" effect for accent cards on hover */
.card--link.card--accent {
  position: relative; overflow: visible; /* allow outer glow */
  border: 1px solid rgba(14,158,150,0.10);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

/* Spotlight theo con trỏ — ánh teal mềm chạy theo chuột, giữ tương phản nội dung */
.card--spot::after {
  content: "";
  position: absolute; inset: 0;
  border-radius: inherit;
  background: radial-gradient(340px circle at var(--mx, 50%) var(--my, 50%),
              rgba(14, 158, 150, 0.12), transparent 62%);
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
  pointer-events: none;
}
.card--spot:hover::after { opacity: 1; }

.card--link.card--accent:hover {
  transform: translateY(-4px);
  /* soft outer glow without tinting the card surface */
  box-shadow:
    0 14px 30px rgba(7,26,43,0.06),
    0 6px 18px rgba(7,26,43,0.04),
    0 0 36px rgba(14,158,150,0.06);
  border-color: rgba(14,158,150,0.22);
}
.card--link.card--accent:hover .card__title { color: var(--c-ink); }
.card--link.card--accent:hover .card__num,
.card--link.card--accent:hover .card__cta { color: var(--c-accent-deep); }

.card--dark { background: var(--c-ink-soft); border-color: var(--c-on-dark-line); }
.card--dark .card__title { color: var(--c-on-dark); }
.card--dark p { color: var(--c-on-dark-muted); }
.card--dark .card__num, .card--dark .card__cta { color: var(--c-accent-bright); }

/* Grid tiện dụng */
.grid { display: grid; gap: clamp(1rem, 1.8vw, 1.5rem); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 960px) { .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 680px)  { .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; } }

/* ---------- Value list (dòng có số thứ tự) --------------- */
.value-list { border-top: 1px solid var(--c-line); }
.section--dark .value-list { border-top-color: var(--c-on-dark-line); }
.value-item {
  display: grid; grid-template-columns: 3.5rem minmax(0, 1fr) minmax(0, 1.5fr);
  gap: clamp(0.75rem, 3vw, 2.5rem); align-items: baseline;
  padding-block: clamp(1.1rem, 2vw, 1.75rem);
  border-bottom: 1px solid var(--c-line);
  transition: background var(--dur) var(--ease), padding-inline var(--dur) var(--ease);
}
.section--dark .value-item { border-bottom-color: var(--c-on-dark-line); }
.value-item:hover { background: var(--c-paper-2); padding-inline: var(--space-4); box-shadow: inset 3px 0 0 var(--c-accent); }
.section--dark .value-item:hover { background: #ffffff0a; box-shadow: inset 3px 0 0 var(--c-accent-bright); }
.value-item__num { font-family: var(--font-display); font-size: clamp(1.25rem, 1rem + 1.2vw, 1.9rem); font-weight: 700; letter-spacing: -0.02em; line-height: 1; color: var(--c-accent-deep); }
.section--dark .value-item__num { color: var(--c-accent-bright); }
.value-item__title { font-family: var(--font-display); font-weight: 600; font-size: var(--text-h4); color: var(--c-ink); }
.section--dark .value-item__title { color: var(--c-on-dark); }
.value-item__body { color: var(--c-text-muted); font-size: var(--text-sm); }
.section--dark .value-item__body { color: var(--c-on-dark-muted); }
@media (max-width: 760px) {
  .value-item { grid-template-columns: 2.5rem minmax(0, 1fr); }
  .value-item__body { grid-column: 2; }
}

/* ---------- Process rail -------------------------------- */
.process { display: flex; flex-wrap: wrap; gap: 0; counter-reset: step; }
.process__step {
  position: relative; flex: 1 1 130px; min-width: 130px;
  padding: var(--space-5) var(--space-4) var(--space-5) 0;
  border-top: 2px solid var(--c-line);
}
.section--dark .process__step { border-top-color: var(--c-on-dark-line); }
.process__step::before {
  content: ""; position: absolute; top: -5px; left: 0; width: 8px; height: 8px;
  border-radius: 50%; background: var(--c-accent);
}
.process__step:first-child::before { background: var(--c-signal); }
.process__step-label { display: block; font-family: var(--font-display); font-size: var(--text-micro); font-weight: 700; letter-spacing: var(--track-label); color: var(--c-accent-deep); }
.section--dark .process__step-label { color: var(--c-accent-bright); }
.process__step-title { display: block; font-family: var(--font-display); font-weight: 600; font-size: 0.98rem; margin-top: 6px; color: var(--c-ink); }
.section--dark .process__step-title { color: var(--c-on-dark); }
@media (max-width: 640px) {
  .process { flex-direction: column; }
  .process__step { border-top: 0; border-left: 2px solid var(--c-line); padding: 0 0 var(--space-5) var(--space-5); }
  .section--dark .process__step { border-left-color: var(--c-on-dark-line); }
  .process__step::before { top: 4px; left: -5px; }
}

/* ---------- Tag / chip ---------------------------------- */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  display: inline-flex; align-items: center;
  padding: 7px 13px; border-radius: 999px;
  border: 1px solid var(--c-line-strong);
  font-size: var(--text-sm); color: var(--c-text);
  background: var(--c-surface);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.tag:hover { border-color: var(--c-accent); color: var(--c-accent-deep); }
.section--dark .tag { background: transparent; border-color: var(--c-on-dark-line); color: var(--c-on-dark); }
.section--dark .tag:hover { border-color: var(--c-accent-bright); color: var(--c-accent-bright); }

/* ---------- Stat ---------------------------------------- */
.stat { padding: var(--space-5) 0; border-top: 2px solid var(--c-ink); }
.stat__value {
  font-family: var(--font-display); font-weight: 600;
  font-size: clamp(2rem, 1.2rem + 2.6vw, 3.25rem); line-height: 1;
  letter-spacing: -0.03em; color: var(--c-ink);
}
.stat__value em { font-style: normal; color: var(--c-accent); }
.stat__label { margin-top: var(--space-3); font-size: var(--text-sm); color: var(--c-text-muted); }
.stat__source { margin-top: var(--space-2); font-size: var(--text-micro); color: var(--c-text-muted); opacity: 0.8; }
.section--dark .stat { border-top-color: var(--c-accent-bright); }
.section--dark .stat__value { color: var(--c-on-dark); }
.section--dark .stat__label, .section--dark .stat__source { color: var(--c-on-dark-muted); }

/* ---------- Insight card -------------------------------- */
.insight {
  display: flex; flex-direction: column;
  background: var(--c-surface); border: 1px solid var(--c-line); border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.insight:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.insight__cover {
  aspect-ratio: 16 / 9; background: var(--c-ink);
  display: grid; place-items: center; position: relative; overflow: hidden;
}
.insight__cover img {
  width: 100%; height: 100%; object-fit: cover;
}
.insight__cover::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(120% 90% at 15% 0%, rgba(25,198,180,0.35), transparent 60%);
}
.insight__cover span {
  position: relative; z-index: 1;
  font-family: var(--font-display); font-weight: 700; font-size: clamp(1.6rem, 4vw, 2.4rem);
  color: #ffffff26; letter-spacing: -0.03em;
}
.insight__body { padding: var(--space-5); display: flex; flex-direction: column; gap: var(--space-3); flex: 1; }
.insight__cat {
  font-family: var(--font-display); font-size: var(--text-micro); font-weight: 700;
  letter-spacing: var(--track-label); text-transform: uppercase; color: var(--c-accent-deep);
}
.insight__title { font-size: var(--text-h4); }
.insight__teaser { font-size: var(--text-sm); color: var(--c-text-muted); }
.insight__meta {
  margin-top: auto; padding-top: var(--space-4); border-top: 1px solid var(--c-line);
  display: flex; flex-wrap: wrap; gap: 8px; align-items: center;
  font-size: var(--text-micro); color: var(--c-text-muted);
}
.insight__meta span + span::before { content: "·"; margin-right: 8px; }
.insight--feature { flex-direction: row; }
.insight--feature .insight__cover { flex: 0 0 42%; aspect-ratio: auto; }
.insight--feature .insight__body { padding: clamp(1.5rem, 3vw, 2.5rem); }
.insight--feature .insight__title { font-size: var(--text-h3); }
@media (max-width: 760px) {
  .insight--feature { flex-direction: column; }
  .insight--feature .insight__cover { flex: none; aspect-ratio: 16 / 9; }
}

/* ---------- Filter bar ---------------------------------- */
.filters { display: flex; flex-wrap: wrap; gap: 8px; }
.filter {
  padding: 8px 15px; border-radius: 999px; border: 1px solid var(--c-line-strong);
  font-family: var(--font-display); font-size: var(--text-sm); font-weight: 500; color: var(--c-text-muted);
  transition: all var(--dur) var(--ease);
}
.filter:hover { border-color: var(--c-ink); color: var(--c-ink); }
.filter[aria-pressed="true"] { background: var(--c-ink); border-color: var(--c-ink); color: #fff; }

/* ---------- Form ---------------------------------------- */
.field { display: flex; flex-direction: column; gap: 7px; }
.field label {
  font-family: var(--font-display); font-size: var(--text-label); font-weight: 600;
  letter-spacing: 0.04em; text-transform: uppercase; color: var(--c-text-muted);
}
.field input, .field select, .field textarea {
  width: 100%; padding: 0.8rem 0.9rem;
  font: inherit; font-size: var(--text-sm); color: var(--c-text);
  background: var(--c-surface); border: 1px solid var(--c-line-strong); border-radius: var(--radius-sm);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.field textarea { min-height: 130px; resize: vertical; }
/* Mũi tên tự vẽ: mũi tên mặc định của trình duyệt nằm sát mép và mỗi trình duyệt một kiểu */
.field select {
  appearance: none; -webkit-appearance: none;
  padding-right: 2.75rem; cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8' fill='none'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%2355677A' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
}
.field select:focus { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8' fill='none'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%230E9E96' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E"); }
.field select::-ms-expand { display: none; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--c-accent); box-shadow: 0 0 0 3px rgba(14,158,150,0.14);
}
.field--full { grid-column: 1 / -1; }
.field .req { color: var(--c-signal); }

.choice-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
@media (max-width: 860px) { .choice-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 520px) { .choice-grid { grid-template-columns: 1fr; } }
.choice { position: relative; }
.choice input { position: absolute; opacity: 0; inset: 0; cursor: pointer; }
.choice span {
  display: flex; align-items: center; gap: 10px; height: 100%;
  padding: 0.9rem 1rem; border: 1px solid var(--c-line-strong); border-radius: var(--radius-sm);
  background: var(--c-surface); font-size: var(--text-sm);
  transition: all var(--dur) var(--ease);
}
.choice span::before {
  content: ""; width: 9px; height: 9px; border-radius: 50%; flex: none;
  border: 1.5px solid var(--c-line-strong); transition: all var(--dur) var(--ease);
}
.choice input:hover + span { border-color: var(--c-ink); }
.choice input:checked + span { border-color: var(--c-accent); background: rgba(14,158,150,0.06); font-weight: 500; }
.choice input:checked + span::before { background: var(--c-accent); border-color: var(--c-accent); }
.choice input:focus-visible + span { outline: 2px solid var(--c-accent); outline-offset: 2px; }

.form-note { font-size: var(--text-micro); color: var(--c-text-muted); }
.form-status { padding: var(--space-4); border-radius: var(--radius-sm); font-size: var(--text-sm); display: none; }
.form-status.is-ok { display: block; background: rgba(14,158,150,0.1); border: 1px solid var(--c-accent); }
.form-status.is-err { display: block; background: rgba(226,163,60,0.12); border: 1px solid var(--c-signal); }

/* ---------- Icons ---------------------------------------- */
.icon {
  width: 22px; height: 22px; flex: none;
  color: var(--c-accent-deep);
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.section--dark .icon { color: var(--c-accent-bright); }
.icon--lg { width: 32px; height: 32px; }

/* Ô vuông bo góc bọc icon — dùng trên card dịch vụ */
.icon-tile {
  width: 44px; height: 44px; border-radius: 10px; flex: none;
  display: inline-grid; place-items: center;
  background: rgba(14,158,150,0.10);
  color: var(--c-accent-deep);
  transition: background var(--dur) var(--ease),
              color var(--dur) var(--ease),
              transform 380ms var(--ease),
              box-shadow var(--dur) var(--ease);
}
.icon-tile .icon { width: 22px; height: 22px; color: currentColor; }
.card:hover .icon-tile {
  background: var(--c-accent); color: #fff;
  transform: rotate(-6deg) scale(1.06);
  box-shadow: 0 10px 24px -10px rgba(14, 158, 150, 0.55);
}
.card--dark .icon-tile { background: rgba(25,198,180,0.16); color: var(--c-accent-bright); }
.card--dark:hover .icon-tile { background: var(--c-accent-bright); color: var(--c-ink); }

/* Nút chuyển ngôn ngữ rộng hơn khi có tiếng Nhật */
.lang-switch button[data-lang="ja"] { letter-spacing: 0; font-size: 0.68rem; }

/* ---------- Trust bar (dải logo khách hàng) --------------- */
.trust {
  padding: clamp(2rem, 1.5rem + 2vw, 3rem) 0;
  border-block: 1px solid var(--c-line);
  background: var(--c-paper);
}
.trust__label {
  font-family: var(--font-display);
  font-size: var(--text-micro); font-weight: 700;
  letter-spacing: var(--track-label); text-transform: uppercase;
  color: var(--c-text-muted);
  margin-bottom: var(--space-4);
  text-align: center;
}
.trust__row {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: clamp(1.25rem, 3vw, 3rem);
  align-items: center;
}
.trust__logo {
  height: 38px;
  display: grid; place-items: center;
  color: var(--c-text-muted);
  font-family: var(--font-display); font-weight: 700;
  font-size: 0.95rem; letter-spacing: -0.01em;
  opacity: 0.72;
  transition: opacity var(--dur) var(--ease), color var(--dur) var(--ease);
  border-radius: 4px;
}
.trust__logo:hover { opacity: 1; color: var(--c-ink); }
.trust__logo svg { width: 100%; height: 100%; }
@media (max-width: 900px) { .trust__row { grid-template-columns: repeat(3, minmax(0, 1fr)); row-gap: 1.75rem; } }
@media (max-width: 480px) { .trust__row { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

/* Font Nhật: giữ hệ system-Japanese để render đẹp trên Windows/mac */
:root { --font-jp: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Noto Sans JP", sans-serif; }
html[lang="ja"] { --font-body: var(--font-jp); --font-display: var(--font-jp); }
html[lang="ja"] h1, html[lang="ja"] h2, html[lang="ja"] h3, html[lang="ja"] h4 { letter-spacing: -0.005em; line-height: 1.35; }
html[lang="ja"] .hero h1 { max-width: 22ch; }
html[lang="ja"] .statement__text { font-size: clamp(2rem, 1.2rem + 3.5vw, 4rem); line-height: 1.35; max-width: 26ch; }

/* Fix menu overflow ở bản tiếng Nhật (chữ dày hơn) */
html[lang="ja"] .nav__link,
html[lang="ja"] .site-header .btn { white-space: nowrap; }
html[lang="ja"] .nav { gap: clamp(0.4rem, 1vw, 1rem); }
html[lang="ja"] .nav__link { font-size: 0.82rem; }
html[lang="ja"] .site-header .btn { font-size: 0.75rem; padding: 0.6rem 1rem; }
html[lang="ja"] .lang-switch button { padding: 0 8px; }

/* Bản tiếng Việt: nowrap + gap chặt hơn để menu vừa 1 hàng */
html[lang="vi"] .nav { gap: clamp(0.5rem, 1.1vw, 1.2rem); }
html[lang="vi"] .nav__link { font-size: 0.84rem; }

/* Nút chuyển ngôn ngữ: focus ring nằm bên trong nên không phá layout container */
.lang-switch button:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: -2px;
  border-radius: 0;
}
.lang-switch button:focus:not(:focus-visible) { outline: none; }

/* =========================================================
   Floating language switch — cố định góc dưới bên phải.
   Không nằm trong header nên menu không giật khi đổi ngôn ngữ.
   ========================================================= */
.lang-float {
  position: fixed;
  right: clamp(16px, 2.4vw, 32px);
  bottom: clamp(16px, 2.4vw, 32px);
  z-index: 90;
  display: inline-flex; align-items: center;
  padding: 4px;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: 999px;
  box-shadow: 0 12px 32px -12px rgba(7, 26, 43, 0.22),
              0 2px 6px rgba(7, 26, 43, 0.06);
  backdrop-filter: saturate(1.2);
  gap: 2px;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.lang-float:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 40px -14px rgba(7, 26, 43, 0.28),
              0 2px 6px rgba(7, 26, 43, 0.08);
}
.lang-float button {
  min-width: 36px; height: 30px;
  padding: 0 12px;
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-body);
  font-size: var(--text-micro); font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--c-text-muted);
  background: transparent;
  border-radius: 999px;
  line-height: 1;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.lang-float button:hover { color: var(--c-ink); }
.lang-float button[aria-pressed="true"] {
  background: var(--c-ink);
  color: #fff;
}
.lang-float button[data-lang="ja"] { letter-spacing: 0; font-size: 0.7rem; padding: 0 10px; }
.lang-float button:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: -2px;
  border-radius: 999px;
}

/* Kèm tránh chồng với các block cuối trang khi rất hẹp */
@media (max-width: 480px) {
  .lang-float { right: 12px; bottom: 12px; padding: 3px; }
  .lang-float button { min-width: 30px; height: 26px; padding: 0 9px; font-size: 10px; }
}

/* Không in ra khi print */
@media print { .lang-float { display: none !important; } }