/* ==========================================================================
   Seiryu-Theme — Footer
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Footer Base
   -------------------------------------------------------------------------- */
.seiryu-footer {
  --footer-bg:   #0f1e2e;
  --footer-text: #ffffff;
  position: relative;
  overflow: hidden;
  min-height: var(--seiryu-footer-height, 240px);
  background-color: var(--footer-bg);
  color: var(--footer-text);
}

.footer-inner {
  position: relative;
  z-index: 1;
  padding-block: var(--seiryu-space-16) var(--seiryu-space-8);
}

/* --------------------------------------------------------------------------
   2. Background: image / video
   -------------------------------------------------------------------------- */
.footer-bg-image {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
}

.footer-bg-video {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.footer-bg-video video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.footer-overlay {
  position: absolute;
  inset: 0;
  opacity: var(--overlay-opacity, 0.5);
}

/* --------------------------------------------------------------------------
   3. Four / Three Column Layout
   -------------------------------------------------------------------------- */
.footer-widgets {
  display: grid;
  gap: var(--seiryu-space-8);
  margin-bottom: var(--seiryu-space-12);
}

.footer-widgets--four-column {
  grid-template-columns: 2fr 1fr 1fr 1fr;
}

.footer-widgets--three-column {
  grid-template-columns: 2fr 1fr 1fr;
}

@media (max-width: 1023px) {
  .footer-widgets--four-column  { grid-template-columns: 1fr 1fr; }
  .footer-widgets--three-column { grid-template-columns: 1fr 1fr; }
  .footer-col--brand { grid-column: 1 / -1; }

  .footer-bottom-inner {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--seiryu-space-4);
  }

  .footer-nav-list { justify-content: center; }
}

@media (max-width: 767px) {
  .footer-widgets--four-column,
  .footer-widgets--three-column { grid-template-columns: 1fr; }
}

/* Brand Column */
.footer-col--brand {}

.footer-logo {
  max-height: 60px;
  width: auto;
  margin-bottom: var(--seiryu-space-4);
}

.footer-site-name {
  font-family: var(--seiryu-font-heading);
  font-size: var(--seiryu-text-xl);
  font-weight: 700;
  margin-bottom: var(--seiryu-space-4);
}

.footer-description {
  font-size: var(--seiryu-text-sm);
  color: var(--footer-text);
  opacity: 0.7;
  line-height: 1.7;
  margin-bottom: var(--seiryu-space-6);
  max-width: 36ch;
}

/* Widget Column */
.footer-col--widget .widget-title {
  font-size: var(--seiryu-text-sm);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--footer-text);
  opacity: 0.5;
  margin-bottom: var(--seiryu-space-4);
  padding-bottom: 0;
  border: none;
}

.footer-col--widget ul { list-style: none; padding: 0; margin: 0; }
.footer-col--widget li { margin-bottom: var(--seiryu-space-2); }
.footer-col--widget a  {
  color: var(--footer-text);
  opacity: 0.75;
  text-decoration: none;
  font-size: var(--seiryu-text-sm);
  transition:
    color var(--seiryu-duration-fast) var(--seiryu-easing-default),
    opacity var(--seiryu-duration-fast) var(--seiryu-easing-default);
}

.footer-col--widget a:hover { opacity: 1; }

/* --------------------------------------------------------------------------
   4. SNS Links
   -------------------------------------------------------------------------- */
.seiryu-sns-links {
  display: flex;
  gap: var(--seiryu-space-3);
  flex-wrap: wrap;
  margin-top: var(--seiryu-space-4);
}

.seiryu-sns-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: rgba(255,255,255,0.12);
  color: var(--footer-text);
  opacity: 0.8;
  border-radius: 50%;
  text-decoration: none;
  transition:
    background-color var(--seiryu-duration-fast) var(--seiryu-easing-default),
    color var(--seiryu-duration-fast) var(--seiryu-easing-default),
    opacity var(--seiryu-duration-fast) var(--seiryu-easing-default),
    transform var(--seiryu-duration-fast) var(--seiryu-easing-default);
}

.seiryu-sns-link:hover {
  background: rgba(255,255,255,0.25);
  opacity: 1;
  transform: translateY(-2px);
}

/* --------------------------------------------------------------------------
   5. Footer Bottom
   -------------------------------------------------------------------------- */
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12);
  padding-top: var(--seiryu-space-6);
}

.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--seiryu-space-6);
  flex-wrap: wrap;
}

.footer-copyright {
  font-size: var(--seiryu-footer-copyright-font-size, var(--seiryu-text-sm));
  color: var(--footer-text);
  opacity: 0.5;
  margin: 0;
}

/* Footer Nav */
.footer-nav-list {
  display: flex;
  gap: var(--seiryu-space-6);
  list-style: none;
  padding: 0;
  margin: 0;
  flex-wrap: wrap;
}

.footer-nav-list a {
  font-size: var(--seiryu-footer-menu-font-size, var(--seiryu-text-sm));
  color: var(--footer-text);
  opacity: 0.6;
  text-decoration: none;
  transition:
    color var(--seiryu-duration-fast) var(--seiryu-easing-default),
    opacity var(--seiryu-duration-fast) var(--seiryu-easing-default);
}

.footer-nav-list a:hover { opacity: 1; }

/* --------------------------------------------------------------------------
   6. Simple Layout
   -------------------------------------------------------------------------- */
.footer-widgets--simple { display: none; }

.seiryu-footer--simple .footer-inner {
  padding-block: var(--seiryu-space-8);
}

.footer-simple-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--seiryu-space-8);
  flex-wrap: wrap;
}

.seiryu-footer--simple .footer-bottom {
  border-top: none;
  padding-top: 0;
}

.seiryu-footer--simple .footer-bottom-inner {
  justify-content: center;
}

.seiryu-footer--simple .footer-copyright {
  text-align: center;
}

@media (max-width: 767px) {
  .footer-inner {
    padding-block: var(--seiryu-space-10) var(--seiryu-space-6);
  }

  .footer-widgets {
    gap: var(--seiryu-space-6);
  }

  .footer-simple-inner {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
}