/* =========================================================================
   layout.css — KHUNG TRANG
   Container, khoi (section), tieu de khoi, cac luoi dung lai nhieu noi.
   ========================================================================= */

.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: clamp(18px, 4vw, 32px);
}
.container--narrow { max-width: 820px; }
.container--wide   { max-width: 1360px; }

/* ── Khoi noi dung ───────────────────────────────────────────
   Moi khoi tu chiu le tren/duoi cua no. KHONG dung margin giua cac khoi —
   margin chong nhau (collapse) rat kho lan khi them/bot khoi. */
.section { padding-block: var(--section-y); position: relative; }
.section--tint { background: var(--surface-2); }
.section--flush-top { padding-top: 0; }

/* Duong ke mo giua hai khoi cung mau nen. */
.section--line { border-top: 1px solid var(--border); }

/* ── Tieu de khoi ────────────────────────────────────────── */
.sec-head { max-width: 720px; margin-bottom: clamp(32px, 4vw, 56px); }
.sec-head--center { margin-inline: auto; text-align: center; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: var(--radius-pill);
  padding: 6px 14px;
  margin-bottom: 16px;
}
.eyebrow::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.sec-head h2 { margin-bottom: .35em; }
.sec-lead {
  font-size: var(--fs-lead);
  color: var(--text-muted);
  margin: 0;
}

/* ── Luoi dung chung ─────────────────────────────────────────
   auto-fit + minmax: tu xuong hang theo cho con lai, khong can media query
   cho tung so cot. */
.grid { display: grid; gap: var(--gap); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

/* Hai cot lech: noi dung ben trai, hinh ben phai (hoac nguoc lai). */
.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: center;
}
@media (max-width: 880px) {
  .split { grid-template-columns: 1fr; }
}

/* ── Nen trang tri ───────────────────────────────────────────
   Deu la pointer-events:none + aria-hidden: chi de nhin, khong chan chuot. */
.deco { position: absolute; inset: 0; overflow: hidden; pointer-events: none; z-index: 0; }
.deco > * { position: absolute; }

/* Dom sang mo — dat sau tieu de cho do "phang". */
.deco-blob {
  border-radius: 50%;
  filter: blur(90px);
  opacity: .5;
}
:root[data-theme="dark"] .deco-blob { opacity: .34; }

/* Luoi ky thuat — hop voi san pham co khi. Mask cho no mo dan ra ria. */
.deco-grid {
  inset: 0;
  background-image:
    linear-gradient(to right, var(--border) 1px, transparent 1px),
    linear-gradient(to bottom, var(--border) 1px, transparent 1px);
  background-size: 56px 56px;
  opacity: .5;
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 30%, transparent 78%);
          mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 30%, transparent 78%);
}

/* Noi dung phai nam TREN lop trang tri. */
.section > .container { position: relative; z-index: 1; }