/**
 * GawangPinas Landing — Layout Stylesheet
 * Header, Navigation, Containers, Section Rhythm, Footer, and Breakpoints
 * Student-Crafted, Responsive, Accessible, Maintainable
 */

/* ── Container System ── */
.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--gp-space-5);
  padding-right: var(--gp-space-5);
}

.container--narrow {
  max-width: 860px;
}

/* ── Sections & Page Rhythm ── */
.section {
  padding-top: var(--gp-space-12);
  padding-bottom: var(--gp-space-12);
}

.section--soft {
  background-color: var(--gp-bg-soft);
  border-top: 1px solid var(--gp-border);
  border-bottom: 1px solid var(--gp-border);
}

.section-head {
  text-align: center;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: var(--gp-space-8);
}

.section-title {
  margin-bottom: var(--gp-space-2);
}

.section-subtitle {
  font-size: 0.9375rem;
  color: var(--gp-text-muted);
  line-height: 1.5;
}

/* ── Header & Primary Navigation ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--gp-surface);
  border-bottom: 1px solid var(--gp-border);
}

.header-inner {
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--gp-space-4);
}

/* Brand Identity */
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}

.brand__logo {
  width: 36px;
  height: 36px;
  border-radius: var(--gp-radius-md);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: transparent;
}

.brand__logo img,
.brand__logo svg {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.brand__name {
  display: flex;
  flex-direction: column;
  font-size: 1.05rem;
  font-weight: 800;
  line-height: 1.1;
  color: var(--gp-text-main);
  letter-spacing: -0.015em;
}

.brand__name small {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--gp-primary);
  letter-spacing: 0.02em;
}

/* Main Navigation Desktop */
.main-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border-radius: var(--gp-radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gp-text-secondary);
  transition: background-color var(--gp-transition-fast), color var(--gp-transition-fast);
}

.nav-link:hover {
  background-color: var(--gp-surface-2);
  color: var(--gp-text-main);
}

.nav-link.is-active,
.nav-link[aria-current="page"] {
  background-color: var(--gp-primary-light);
  color: var(--gp-primary) !important;
  font-weight: 600;
}

.nav-link.is-active:hover,
.nav-link[aria-current="page"]:hover,
.nav-link.is-active:focus-visible,
.nav-link[aria-current="page"]:focus-visible {
  background-color: #F5E9D4;
  color: var(--gp-primary-hover) !important;
}

.nav-link:active {
  background-color: var(--gp-primary-light);
  color: var(--gp-primary);
}

/* Dropdown Menu */
.nav-dropdown {
  position: relative;
}

.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background-color: var(--gp-surface);
  border: 1px solid var(--gp-border);
  border-radius: var(--gp-radius-md);
  padding: 6px;
  box-shadow: var(--gp-shadow-md);
  z-index: 1050;
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown:focus-within .nav-dropdown-menu {
  display: block;
}

.nav-dropdown-item {
  display: block;
  padding: 8px 12px;
  border-radius: var(--gp-radius-sm);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--gp-text-secondary);
  text-decoration: none;
}

.nav-dropdown-item:hover {
  background-color: var(--gp-surface-2);
  color: var(--gp-text-main);
}

.nav-dropdown-item.is-active,
.nav-dropdown-item[aria-current="page"] {
  background-color: var(--gp-primary-light);
  color: var(--gp-primary) !important;
  font-weight: 600;
}

.nav-dropdown-item:active {
  background-color: var(--gp-primary-light);
  color: var(--gp-primary);
}

/* Header Action Buttons */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--gp-space-2);
  flex-shrink: 0;
}

/* Mobile Nav Toggle */
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--gp-border);
  background: var(--gp-surface);
  border-radius: var(--gp-radius-sm);
  cursor: pointer;
  color: var(--gp-text-main);
  transition: background-color var(--gp-transition-fast), border-color var(--gp-transition-fast), color var(--gp-transition-fast);
}

.nav-toggle svg,
.nav-toggle path {
  pointer-events: none;
}

.nav-toggle svg {
  width: 22px;
  height: 22px;
}

.nav-toggle:hover {
  background-color: var(--gp-surface-2);
  border-color: var(--gp-primary-border);
  color: var(--gp-primary);
}

.nav-toggle[aria-expanded="true"] {
  background-color: var(--gp-primary-light);
  border-color: var(--gp-primary);
  color: var(--gp-primary);
}

/* ── Standard Page Header (Subpages) ── */
.page-header {
  background-color: var(--gp-bg-soft);
  border-bottom: 1px solid var(--gp-border);
  padding: var(--gp-space-8) 0;
}

.page-header__inner {
  display: flex;
  flex-direction: column;
  gap: var(--gp-space-2);
}

.page-header__title {
  margin: 0;
}

.page-header__desc {
  font-size: 0.9375rem;
  color: var(--gp-text-muted);
  max-width: 640px;
  margin: 0;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8125rem;
  color: var(--gp-text-muted);
  margin-bottom: var(--gp-space-2);
}

.breadcrumb a {
  color: var(--gp-text-muted);
}

.breadcrumb a:hover {
  color: var(--gp-primary);
}

.breadcrumb-sep {
  color: var(--gp-border-strong);
}

/* ── Footer ── */
.gp-footer {
  background-color: #211914; /* Slate Obsidian */
  color: #BA8C63;
  padding: var(--gp-space-12) 0 var(--gp-space-6);
  border-top: 1px solid #30231D;
}

.gp-footer a {
  color: #BA8C63;
  transition: color var(--gp-transition-fast);
}

.gp-footer a:hover {
  color: #ffffff;
}

.gp-footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: var(--gp-space-6);
  margin-bottom: var(--gp-space-10);
}

.gp-footer-brand {
  max-width: 320px;
}

.gp-footer-brand .brand__name {
  color: #ffffff;
}

.gp-footer-brand .brand__name small {
  color: #F0CB5B;
}

.gp-footer-brand p {
  font-size: 0.8125rem;
  line-height: 1.5;
  margin-top: var(--gp-space-3);
  color: #675644;
}

.gp-footer-col h3,
.gp-footer-heading {
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #FDFBF7;
  margin-bottom: var(--gp-space-3);
}

.gp-footer-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.gp-footer-links li a {
  font-size: 0.8125rem;
  text-decoration: none;
}

.gp-footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--gp-space-4);
  padding-top: var(--gp-space-6);
  border-top: 1px solid #30231D;
  font-size: 0.75rem;
  color: #675644;
}

.gp-footer-legal-links {
  display: flex;
  gap: var(--gp-space-4);
}

/* Back to Top */
.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 40px;
  height: 40px;
  border-radius: var(--gp-radius-md);
  background-color: var(--gp-surface);
  border: 1px solid var(--gp-border);
  color: var(--gp-text-main);
  box-shadow: var(--gp-shadow-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 900;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--gp-transition-fast), visibility var(--gp-transition-fast), transform var(--gp-transition-fast);
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  color: var(--gp-primary);
  border-color: var(--gp-primary);
  transform: translateY(-2px);
}

/* ── Responsive Breakpoints ── */
@media (max-width: 992px) {
  .gp-footer-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
  .gp-footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  .main-nav {
    display: none;
  }

  .main-nav.is-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background-color: var(--gp-surface);
    border-bottom: 1px solid var(--gp-border);
    padding: var(--gp-space-4);
    box-shadow: var(--gp-shadow-md);
    z-index: 1100;
    max-height: calc(100vh - 72px);
    overflow-y: auto;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    gap: 4px;
  }

  .nav-link {
    width: 100%;
    padding: 10px 14px;
  }

  .nav-dropdown-menu {
    position: static;
    display: block;
    box-shadow: none;
    border: none;
    padding-left: var(--gp-space-4);
    background-color: var(--gp-surface-2);
  }

  .nav-toggle {
    display: inline-flex;
  }

  .header-actions .btn--hide-mobile {
    display: none;
  }

  .section {
    padding-top: var(--gp-space-8);
    padding-bottom: var(--gp-space-8);
  }

  .gp-footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .gp-footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--gp-space-3);
  }
}

@media (max-width: 480px) {
  .container {
    padding-left: var(--gp-space-4);
    padding-right: var(--gp-space-4);
  }

  .gp-footer-grid {
    grid-template-columns: 1fr;
    gap: var(--gp-space-5);
  }
}