/*
 * footer.css
 * Biharibuilder Design System — Footer Component
 * Version: 1.0
 *
 * Dark footer (#1B1D1E) with 4 columns:
 *   1. Company (logo + description + social)
 *   2. Quick Links
 *   3. Services
 *   4. Contact & Newsletter
 *
 * Mobile: single column, centered
 * Tablet: 2 columns
 * Desktop: 4 columns
 */

/* =========================================================
   FOOTER WRAPPER
   ========================================================= */

.site-footer {
  background-color: var(--bg-footer);   /* #1B1D1E */
  color: rgba(255, 255, 255, 0.7);
  padding-top: var(--space-24);         /* 96px */
  padding-bottom: 0;
}

/* =========================================================
   FOOTER MAIN — 4-column grid
   ========================================================= */

.footer__main {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);                 /* 48px */
  padding-bottom: var(--space-12);
}

@media (min-width: 576px) {
  .footer__main {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-8);
  }
}

@media (min-width: 1200px) {
  .footer__main {
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: var(--space-8);
  }
}

/* =========================================================
   FOOTER COLUMN
   ========================================================= */

.footer__col {}

/* Column heading */
.footer__col-title {
  font-family: var(--font-heading);
  font-size: var(--text-small);          /* 16px */
  font-weight: var(--weight-semibold);
  color: var(--color-white);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  margin-bottom: var(--space-6);
  position: relative;
  padding-bottom: var(--space-4);
}

/* Copper underline accent */
.footer__col-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 32px;
  height: 2px;
  background: var(--color-copper);
  border-radius: var(--radius-round);
}

/* =========================================================
   FOOTER BRAND COLUMN
   ========================================================= */

.footer__brand {}

.footer__logo {
  display: inline-flex;
  margin-bottom: var(--space-6);
}

.footer__logo img {
  width: 160px;
  height: auto;
  /* Filter to ensure logo is visible on dark background */
  filter: brightness(0) invert(1);
  opacity: 0.9;
}

.footer__description {
  font-size: var(--text-small);
  color: rgba(255, 255, 255, 0.6);
  line-height: var(--leading-relaxed);
  max-width: 30ch;
  margin-bottom: var(--space-6);
}

/* =========================================================
   FOOTER SOCIAL ICONS
   ========================================================= */

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

.footer__social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-round);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition:
    background var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast),
    transform var(--transition-fast);
}

.footer__social-link:hover {
  background: var(--color-copper);
  border-color: var(--color-copper);
  color: var(--color-white);
  transform: translateY(-2px);
}

.footer__social-link svg {
  width: 18px;
  height: 18px;
}

/* =========================================================
   FOOTER NAVIGATION LINKS
   ========================================================= */

.footer__nav {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.footer__nav-item + .footer__nav-item {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer__nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding-block: var(--space-3);     /* 12px */
  font-size: var(--text-small);
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  transition: color var(--transition-fast), padding-left var(--transition-fast);
  min-height: 44px;
}

.footer__nav-link::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 1px;
  background: var(--color-copper);
  border-radius: var(--radius-round);
  flex-shrink: 0;
  opacity: 0;
  transition: opacity var(--transition-fast), width var(--transition-fast);
}

.footer__nav-link:hover {
  color: var(--color-white);
  padding-left: var(--space-2);
}

.footer__nav-link:hover::before {
  opacity: 1;
  width: 10px;
}

/* =========================================================
   FOOTER CONTACT INFO
   ========================================================= */

.footer__contact {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.footer__contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  text-decoration: none;
  color: rgba(255, 255, 255, 0.6);
  font-size: var(--text-small);
  line-height: var(--leading-normal);
  transition: color var(--transition-fast);
  min-height: 44px;
}

.footer__contact-item:hover {
  color: var(--color-white);
}

.footer__contact-icon {
  width: 18px;
  height: 18px;
  color: var(--color-copper);
  flex-shrink: 0;
  margin-top: 2px;
}

/* =========================================================
   FOOTER NEWSLETTER
   ========================================================= */

.footer__newsletter-form {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.footer__newsletter-input {
  flex: 1;
  height: 48px;
  padding-inline: var(--space-4);
  background: rgba(255, 255, 255, 0.08);
  border: 1.5px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: var(--text-small);
  transition: border-color var(--transition-fast), background var(--transition-fast);
  min-width: 0;
}

.footer__newsletter-input::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

.footer__newsletter-input:focus {
  outline: none;
  border-color: var(--color-copper);
  background: rgba(255, 255, 255, 0.1);
}

.footer__newsletter-btn {
  height: 48px;
  padding-inline: var(--space-4);
  background: var(--color-copper);
  border: none;
  border-radius: var(--radius-md);
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: var(--text-caption);
  font-weight: var(--weight-semibold);
  cursor: pointer;
  white-space: nowrap;
  transition:
    background var(--transition-fast),
    transform  var(--transition-fast);
  flex-shrink: 0;
}

.footer__newsletter-btn:hover {
  background: var(--color-copper-dark);
  transform: translateY(-1px);
}

.footer__newsletter-note {
  font-size: var(--text-caption);
  color: rgba(255, 255, 255, 0.4);
  margin-top: var(--space-2);
  line-height: var(--leading-normal);
}

/* =========================================================
   FOOTER DIVIDER
   ========================================================= */

.footer__divider {
  border: none;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  margin: 0;
}

/* =========================================================
   FOOTER BOTTOM BAR — copyright + legal links
   ========================================================= */

.footer__bottom {
  padding-block: var(--space-6);    /* 24px */
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: center;
  text-align: center;
}

@media (min-width: 768px) {
  .footer__bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.footer__copyright {
  font-size: var(--text-caption);
  color: rgba(255, 255, 255, 0.4);
  line-height: var(--leading-normal);
}

.footer__copyright a {
  color: var(--color-copper);
  transition: color var(--transition-fast);
}

.footer__copyright a:hover {
  color: var(--color-copper-light);
}

.footer__legal {
  display: flex;
  gap: var(--space-6);
  flex-wrap: wrap;
  justify-content: center;
}

.footer__legal-link {
  font-size: var(--text-caption);
  color: rgba(255, 255, 255, 0.4);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer__legal-link:hover {
  color: rgba(255, 255, 255, 0.7);
}

/* =========================================================
   FOOTER — Mobile centering overrides
   ========================================================= */

@media (max-width: 575px) {
  .footer__col-title::after {
    left: 50%;
    transform: translateX(-50%);
  }

  .footer__col {
    text-align: center;
  }

  .footer__nav-link {
    justify-content: center;
  }

  .footer__nav-link::before {
    display: none;
  }

  .footer__contact-item {
    justify-content: center;
  }

  .footer__social {
    justify-content: center;
  }

  .footer__description {
    max-width: 100%;
    text-align: center;
  }

  .footer__logo {
    display: flex;
    justify-content: center;
    width: 100%;
  }
}