/* ===========================================================
   フッター (footer)
   Mobile-first → PC ở cuối file.
   =========================================================== */
.footer {
  position: relative;
  background: linear-gradient(0deg, #000 60%, rgba(0, 0, 0, 0) 100%), var(--color-bg);
  padding: 60px 0 24px;
}
.footer__inner {
  width: 100%;
  max-width: 350px;
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: 1fr;
  grid-template-areas:
    "nav"
    "btns"
    "brand";
  gap: 48px;
  justify-items: center;
}

/* nav */
.footer__nav {
  grid-area: nav;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 26px;
}
.footer__nav a {
  font-family: var(--font-serif);
  font-weight: 200;                           /* Figma SP: ExtraLight */
  font-size: 16px;                            /* Figma SP: 16px (PC 18px) */
  letter-spacing: 0.04em;
  color: var(--color-white);
  transition: opacity 0.3s ease;
}
.footer__nav a:hover { opacity: 0.6; }

/* buttons */
.footer__btns {
  grid-area: btns;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}
.footer__btns .btn-bracket span { font-size: 18px; font-weight: 400; min-width: 200px; text-align: center; } /* Figma: 18px w400 */

/* brand */
.footer__brand {
  grid-area: brand;
  text-align: center;
}
.footer__tag {
  font-family: var(--font-serif);
  font-size: 18px;                            /* Figma SP: 18px */
  letter-spacing: 0.04em;
  color: var(--color-white);
  margin-bottom: 10px;
}
.footer__logo {
  font-size: 30px;
  margin-bottom: 16px;
}
.footer__addr {
  font-family: var(--font-serif);
  font-weight: 200;
  font-size: 16px;                            /* Figma SP: ExtraLight 16px */
  line-height: 1.7;
  color: #787878;
}

/* copyright */
.footer__copy {
  margin-top: 44px;
  padding-top: 20px;
  border-top: 1px solid #2C2C2C;
  text-align: center;
  font-family: var(--font-serif);
  font-size: 12px;                            /* Figma SP: 12px (PC 14px) */
  letter-spacing: 0.04em;
  color: #464646;
}

/* ===========================================================
   PC (≥1024px)
   =========================================================== */
@media (min-width: 1024px) {
  .footer { padding: 90px 0 30px; }
  .footer__inner {
    max-width: 1346px;
    padding: 0 47px;
    grid-template-columns: 1fr auto;   /* brand chiếm trái, cột phải = bề rộng nav */
    grid-template-areas:
      "brand btns"
      "brand nav";
    column-gap: 40px;
    row-gap: 40px;
    justify-items: start;
    align-items: start;
  }

  .footer__brand { align-self: center; }
  .footer__tag { font-size: 18px; }
  .footer__logo { font-size: 40px; }
  .footer__addr { font-size: 16px; text-align: left;}

  /* buttons top-right (row) — trải đều theo bề rộng nav */
  .footer__btns {
    flex-direction: row;
    justify-self: stretch;
    justify-content: space-around;
  }

  /* nav grid 4 × 2 */
  .footer__nav {
    justify-self: end;
    display: grid;
    grid-template-columns: repeat(4, auto);
    column-gap: 44px;
    row-gap: 18px;
  }
  .footer__nav a { font-size: 18px; font-weight: 200; }  /* Figma PC: ExtraLight 18px */

  .footer__btns .btn-bracket span { font-size: 18px; }   /* Figma PC: 18px */

  .footer__copy { margin-top: 60px; font-size: 14px; }   /* Figma PC: 14px */
}