/* ==========================================================================
   PAPAN SSD LTD — layout.css
   Purpose: header, navigation, footer, grids and structural layouts.
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid rgba(217,230,239,.78);
  backdrop-filter: blur(18px);
  
}
.site-header.is-scrolled {
  box-shadow: 0 14px 42px rgba(7, 20, 33, .08);
}

.topbar {
  min-height: var(--topbar-height);
  color: rgba(255,255,255,.88);
  background: var(--gradient-dark);
  font-size: .86rem;
}

.topbar-inner,
.nav-inner,
.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.topbar-inner {
  min-height: var(--topbar-height);
}

.topbar p {
  color: rgba(255,255,255,.82);
}

.topbar-links {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.topbar-links a {
  position: relative;
  color: rgba(255,255,255,.94);
  font-weight: 650;
}

.topbar-links a:hover {
  color: var(--color-sky-blue);
}

.navbar {
  min-height: var(--nav-height);
}

.nav-inner {
  min-height: var(--nav-height);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .8rem;
  color: var(--color-deep-blue);
  font-family: var(--font-heading);
  font-weight: 950;
  letter-spacing: -.035em;
}

.brand-mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border: 3px solid var(--color-sky-blue);
  border-radius: 50%;
  color: var(--color-deep-blue);
  background: var(--color-white);
  box-shadow: 0 10px 25px rgba(41,170,225,.16);
}

.brand-mark::after {
  content: "";
  position: absolute;
  inset: -8px;
  border: 2px solid rgba(21,71,124,.10);
  border-left-color: var(--color-black);
  border-radius: inherit;
}

.brand-text {
  font-size: clamp(1rem, 1.5vw, 1.22rem);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: clamp(.8rem, 1.7vw, 1.4rem);
  list-style: none;
}

.nav-menu a {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--color-ink-soft);
  font-size: .94rem;
  font-weight: 750;
}

.nav-menu a:not(.nav-cta)::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: .32rem;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: right;
  border-radius: var(--radius-pill);
  background: var(--color-sky-blue);
  transition: transform var(--duration) var(--ease-soft);
}

.nav-menu a:hover::after,
.nav-menu a.is-active::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-cta {
  padding: .78rem 1.12rem;
  color: var(--color-white) !important;
  background: var(--gradient-primary);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-soft);
}

.nav-toggle {
  display: none;
}

.hero-grid,
.split-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, .92fr);
  gap: clamp(2.2rem, 6vw, 5.5rem);
  align-items: center;
}

.grid-2,
.grid-3,
.grid-4 {
  display: grid;
  gap: clamp(1rem, 2vw, 1.5rem);
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.site-footer {
  position: relative;
  overflow: hidden;
  padding-top: clamp(70px, 9vw, 118px);
  color: rgba(255,255,255,.82);
  background: var(--gradient-dark);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: .18;
  background-image:
    url("/assets/img/patterns/engineering-grid.svg"),
    radial-gradient(circle at 18% 20%, rgba(41,170,225,.36), transparent 28rem);
  background-size: 680px auto, auto;
  pointer-events: none;
}

.footer-grid,
.footer-bottom-inner {
  position: relative;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(260px, 1.35fr) repeat(2, minmax(160px, .75fr)) minmax(230px, 1fr);
  gap: clamp(1.8rem, 5vw, 4.2rem);
}

.footer-logo {
  display: inline-flex;
  margin-bottom: 1rem;
  color: var(--color-white);
  font-family: var(--font-heading);
  font-size: 1.45rem;
  font-weight: 950;
  letter-spacing: -.04em;
}

.footer-brand p {
  max-width: 380px;
}

.footer-col h2 {
  margin-bottom: 1rem;
  color: var(--color-white);
  font-size: .95rem;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.footer-col ul {
  display: grid;
  gap: .72rem;
  list-style: none;
}

.footer-col a {
  color: rgba(255,255,255,.78);
}

.footer-col a:hover {
  color: var(--color-sky-blue);
}

.footer-bottom {
  position: relative;
  margin-top: clamp(48px, 7vw, 82px);
  padding-block: 1.4rem;
  border-top: 1px solid rgba(255,255,255,.14);
}

.brand-text {
  display: grid;
  gap: .08rem;
  line-height: 1.05;
}

.brand-text strong {
  color: var(--color-deep-blue);
  font-family: var(--font-heading);
  font-size: clamp(1rem, 1.4vw, 1.18rem);
  font-weight: 950;
  letter-spacing: -.035em;
}

.brand-text small {
  color: var(--color-muted);
  font-size: .72rem;
  font-weight: 750;
  letter-spacing: .05em;
  text-transform: uppercase;
}

.nav-item {
  position: relative;
}

.nav-drop-toggle {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  min-height: 44px;
  color: var(--color-ink-soft);
  font-size: .94rem;
  font-weight: 760;
  background: transparent;
  transition: color var(--duration) var(--ease-soft);
}

.nav-drop-toggle:hover,
.nav-item.is-open > .nav-drop-toggle {
  color: var(--color-deep-blue);
}

.nav-dropdown {
  position: absolute;
  top: calc(100% + .65rem);
  left: 50%;
  z-index: var(--z-dropdown);
  display: grid;
  min-width: 260px;
  transform: translateX(-50%) translateY(10px);
  padding: .65rem;
  border: var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, .98);
  box-shadow: var(--shadow-float);
  opacity: 0;
  visibility: hidden;
  list-style: none;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  transition:
    opacity var(--duration) var(--ease-soft),
    visibility var(--duration) var(--ease-soft),
    transform var(--duration) var(--ease-soft);
}

.nav-dropdown-wide {
  min-width: 340px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.nav-item:hover > .nav-dropdown,
.nav-item:focus-within > .nav-dropdown,
.nav-item.is-open > .nav-dropdown {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
  visibility: visible;
}

.nav-dropdown a {
  display: flex;
  align-items: center;
  min-height: 42px;
  padding: .72rem .85rem;
  border-radius: var(--radius-sm);
  color: var(--color-ink-soft);
  font-size: .9rem;
  font-weight: 760;
  line-height: 1.25;
}

.nav-dropdown a:hover,
.nav-dropdown a.is-active {
  color: var(--color-deep-blue);
  background: rgba(41, 170, 225, .08);
}

.nav-dropdown a::after {
  display: none !important;
}



/* Global PAPAN brand image sizing */
.brand-logo-img {
  display: block;
  width: 156px;
  height: auto;
  max-height: 54px;
  object-fit: contain;
}

.brand-fallback {
  display: none;
  align-items: center;
  gap: .75rem;
}

.brand-fallback .brand-mark {
  width: 48px;
  height: 48px;
  flex: 0 0 48px;
}

/* Compact desktop Projects dropdown */
.nav-dropdown-projects {
  left: auto;
  right: 0;
  width: min(560px, calc(100vw - 2rem));
  min-width: 0;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  transform: translateY(10px);
}

.nav-item:hover > .nav-dropdown-projects,
.nav-item:focus-within > .nav-dropdown-projects,
.nav-item.is-open > .nav-dropdown-projects {
  transform: translateY(0);
}

.nav-dropdown-projects a {
  min-height: 38px;
  padding: .58rem .72rem;
  font-size: .84rem;
}

/* Footer headings and contact button behaviour */
.site-footer .footer-col h2,
.site-footer .footer-contact h2 {
  color: var(--color-sky-blue);
}

.footer-contact-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: fit-content;
  min-height: 42px;
  margin-top: .35rem;
  padding: .72rem 1.05rem;
  border: 1px solid rgba(255, 255, 255, .32);
  border-radius: var(--radius-pill);
  color: var(--color-white);
  background: rgba(255, 255, 255, .10);
  font-weight: 850;
  line-height: 1;
  transition:
    transform var(--duration) var(--ease-soft),
    color var(--duration) var(--ease-soft),
    background var(--duration) var(--ease-soft),
    border-color var(--duration) var(--ease-soft),
    box-shadow var(--duration) var(--ease-soft);
}

.footer-contact-btn:hover,
.footer-contact-btn:focus-visible {
  transform: translateY(-2px);
  color: var(--color-white);
  border-color: rgba(255, 255, 255, .55);
  background: rgba(255, 255, 255, .18);
  box-shadow: 0 12px 28px rgba(0, 0, 0, .16);
}

/* Footer social links below the Contact Us button */
.footer-social-item {
  margin-top: .35rem;
}

.footer-socials {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: .6rem;
}

.footer-social-link {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  border: 1px solid rgba(255, 255, 255, .22);
  border-radius: 50%;
  background: rgba(255, 255, 255, .08);
  box-shadow: 0 10px 24px rgba(0, 0, 0, .12);
  transition:
    transform var(--duration) var(--ease-soft),
    background var(--duration) var(--ease-soft),
    border-color var(--duration) var(--ease-soft),
    box-shadow var(--duration) var(--ease-soft);
}

.footer-social-link img {
  display: block;
  width: 20px;
  height: 20px;
  max-width: 20px;
  max-height: 20px;
  object-fit: contain;
}

.footer-social-link:hover,
.footer-social-link:focus-visible {
  transform: translateY(-3px);
  border-color: rgba(41, 170, 225, .64);
  background: rgba(41, 170, 225, .18);
  box-shadow: 0 14px 30px rgba(0, 0, 0, .18);
}

@media (max-width: 680px) {
  .footer-socials {
    gap: .5rem;
  }

  .footer-social-link {
    width: 40px;
    height: 40px;
    flex-basis: 40px;
  }

  .footer-social-link img {
    width: 19px;
    height: 19px;
    max-width: 19px;
    max-height: 19px;
  }
}


@media (max-width: 1060px) {
  .grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-grid,
  .split-grid {
    grid-template-columns: 1fr;
  }
}


@media (max-width: 940px) {
  .topbar {
    display: none;
  }

  .site-header {
    top: 0;
  }

  .navbar,
  .nav-inner {
    min-height: var(--nav-height);
  }

  .nav-inner {
    position: relative;
  }

  .brand {
    min-width: 0;
    flex: 1 1 auto;
  }

  .brand-logo-img {
    width: 132px;
    max-height: 46px;
  }

  .brand-text small {
    display: none;
  }

  .nav-toggle {
    position: relative;
    z-index: calc(var(--z-dropdown) + 2);
    display: inline-flex;
    width: 46px;
    height: 46px;
    flex: 0 0 46px;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    border-radius: 50%;
    background: var(--color-light);
    transition:
      background var(--duration) var(--ease-soft),
      transform var(--duration) var(--ease-soft);
  }

  .nav-toggle:hover,
  .nav-toggle:focus-visible,
  .nav-toggle[aria-expanded="true"] {
    background: var(--color-surface-blue);
  }

  .nav-toggle:active {
    transform: scale(.96);
  }

  .nav-toggle-line {
    width: 22px;
    height: 2px;
    margin-inline: auto;
    border-radius: var(--radius-pill);
    background: var(--color-deep-blue);
    transition:
      transform var(--duration) var(--ease-soft),
      opacity var(--duration) var(--ease-soft);
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  .nav-menu {
    position: fixed;
    top: calc(var(--nav-height) + 8px);
    left: var(--gutter);
    right: var(--gutter);
    z-index: var(--z-dropdown);

    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: .25rem;

    width: auto;
    max-height: calc(100dvh - var(--nav-height) - 24px);
    overflow-x: hidden;
    overflow-y: auto;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;

    padding: 1rem;
    border: var(--line);
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, .985);
    box-shadow: var(--shadow-float);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
  }

  .nav-menu.is-open {
    display: flex;
  }

  .nav-menu > li,
  .nav-item {
    width: 100%;
    min-width: 0;
  }

  .nav-menu > li > a,
  .nav-drop-toggle {
    width: 100%;
    min-width: 0;
    min-height: 48px;
    padding: .72rem .85rem;
    border-radius: var(--radius-sm);
  }

  .nav-menu > li > a {
    justify-content: space-between;
  }

  .nav-menu > li > a:not(.nav-cta):hover,
  .nav-menu > li > a:not(.nav-cta):focus-visible,
  .nav-menu > li > a.is-active,
  .nav-drop-toggle:hover,
  .nav-drop-toggle:focus-visible,
  .nav-item.is-open > .nav-drop-toggle {
    color: var(--color-deep-blue);
    background: rgba(41, 170, 225, .08);
  }

  .nav-menu a:not(.nav-cta)::after {
    display: none;
  }

  .nav-drop-toggle {
    justify-content: space-between;
  }

  .nav-drop-toggle span {
    flex: 0 0 auto;
    transition: transform var(--duration) var(--ease-soft);
  }

  .nav-item.is-open > .nav-drop-toggle span {
    transform: rotate(180deg);
  }

  .nav-dropdown,
  .nav-dropdown-wide,
  .nav-dropdown-projects {
    position: static;
    top: auto;
    left: auto;
    z-index: auto;

    display: none;
    width: 100%;
    min-width: 0;
    max-width: 100%;
    grid-template-columns: 1fr;
    transform: none !important;

    margin: .25rem 0 .45rem;
    padding: .45rem;
    border: 0;
    border-radius: var(--radius-md);
    background: var(--color-light);
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    transition: none;
  }

  .nav-item.is-open > .nav-dropdown,
  .nav-item.is-open > .nav-dropdown-wide,
  .nav-item.is-open > .nav-dropdown-projects {
    display: grid;
    transform: none !important;
  }


  .nav-dropdown-projects {
    right: auto;
    grid-template-columns: 1fr;
  }

  .nav-dropdown li {
    width: 100%;
    min-width: 0;
  }

  .nav-dropdown a {
    width: 100%;
    min-width: 0;
    min-height: 44px;
    padding: .72rem 1rem;
    white-space: normal;
    overflow-wrap: anywhere;
    line-height: 1.35;
  }

  .nav-cta {
    justify-content: center !important;
    margin-top: .25rem;
  }
}

@media (max-width: 680px) {
  .grid-2,
  .grid-3,
  .grid-4,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-bottom-inner {
    align-items: flex-start;
    flex-direction: column;
  }
}

/* ==========================================================================
   Floating quick actions
   WhatsApp, email and back-to-top controls for desktop and mobile.
   ========================================================================== */

.floating-actions {
  position: fixed;
  right: clamp(.85rem, 2vw, 1.2rem);
  bottom: max(1.2rem, env(safe-area-inset-bottom));
  z-index: var(--z-sticky);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .65rem;
}

.floating-action,
.floating-actions .back-to-top {
  position: relative;
  right: auto;
  bottom: auto;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  flex: 0 0 46px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  color: var(--color-white);
  box-shadow: 0 12px 28px rgba(7, 20, 33, .22);
  transition:
    opacity var(--duration) var(--ease-soft),
    visibility var(--duration) var(--ease-soft),
    transform var(--duration) var(--ease-soft),
    box-shadow var(--duration) var(--ease-soft),
    background var(--duration) var(--ease-soft);
}

.floating-action svg,
.floating-actions .back-to-top svg {
  width: 21px;
  height: 21px;
  pointer-events: none;
}

.floating-action:hover,
.floating-action:focus-visible,
.floating-actions .back-to-top:hover,
.floating-actions .back-to-top:focus-visible {
  transform: translateY(-3px);
  box-shadow: 0 16px 34px rgba(7, 20, 33, .3);
}

.floating-action:active,
.floating-actions .back-to-top:active {
  transform: translateY(-1px) scale(.96);
}

.floating-action-whatsapp {
  background: #25d366;
}

.floating-action-whatsapp:hover,
.floating-action-whatsapp:focus-visible {
  background: #1fbd5b;
}

.floating-action-email {
  background: var(--color-deep-blue);
}

.floating-action-email:hover,
.floating-action-email:focus-visible {
  background: var(--color-sky-blue);
}

.floating-actions .back-to-top {
  display: none;
  transform: translateY(14px);
  opacity: 0;
  visibility: hidden;
  background: var(--gradient-primary);
}

.floating-actions .back-to-top.is-visible {
  display: grid;
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

/* Accessible desktop labels without adding visible text to the circles */
.floating-action::after,
.floating-actions .back-to-top::after {
  content: attr(data-label);
  position: absolute;
  right: calc(100% + .65rem);
  top: 50%;
  transform: translateY(-50%) translateX(5px);
  width: max-content;
  max-width: 180px;
  padding: .48rem .68rem;
  border-radius: var(--radius-sm);
  color: var(--color-white);
  background: rgba(7, 20, 33, .94);
  box-shadow: 0 10px 24px rgba(7, 20, 33, .18);
  font-size: .75rem;
  font-weight: 750;
  line-height: 1;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition:
    opacity var(--duration) var(--ease-soft),
    visibility var(--duration) var(--ease-soft),
    transform var(--duration) var(--ease-soft);
}

.floating-action:hover::after,
.floating-action:focus-visible::after,
.floating-actions .back-to-top:hover::after,
.floating-actions .back-to-top:focus-visible::after {
  transform: translateY(-50%) translateX(0);
  opacity: 1;
  visibility: visible;
}

@media (max-width: 680px) {
  .floating-actions {
    right: .8rem;
    bottom: max(.8rem, env(safe-area-inset-bottom));
    gap: .55rem;
  }

  .floating-action,
  .floating-actions .back-to-top {
    width: 44px;
    height: 44px;
    flex-basis: 44px;
  }

  .floating-action svg,
  .floating-actions .back-to-top svg {
    width: 20px;
    height: 20px;
  }

  .floating-action::after,
  .floating-actions .back-to-top::after {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .floating-action,
  .floating-actions .back-to-top,
  .floating-action::after,
  .floating-actions .back-to-top::after {
    transition: none;
  }
}

/* Footer bottom legal links and website credit */
.footer-bottom-inner {
  align-items: center;
}

.footer-copyright {
  color: rgba(255, 255, 255, .82);
}

.footer-bottom-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 1.25rem;
  min-width: 0;
}

.footer-legal-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-legal-links a {
  white-space: nowrap;
}

.footer-credit {
  color: rgba(255, 255, 255, .58);
  font-size: .78rem;
  font-style: italic;
  line-height: 1.4;
  white-space: nowrap;
}

.footer-credit:hover,
.footer-credit:focus-visible {
  color: var(--color-sky-blue);
}

@media (max-width: 900px) {
  .footer-bottom-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .footer-bottom-links {
    width: 100%;
    justify-content: flex-start;
    flex-wrap: wrap;
    gap: .8rem 1rem;
  }
}

@media (max-width: 520px) {
  .footer-bottom {
    padding-block: 1.2rem;
  }

  .footer-bottom-inner {
    align-items: stretch;
    gap: .85rem;
  }

  .footer-copyright {
    font-size: .88rem;
    line-height: 1.55;
  }

  .footer-bottom-links {
    display: grid;
    justify-items: start;
    gap: .75rem;
  }

  .footer-legal-links {
    display: flex;
    flex-wrap: wrap;
    gap: .45rem .9rem;
  }

  .footer-legal-links a {
    font-size: .88rem;
    white-space: normal;
  }

  .footer-credit {
    max-width: 100%;
    font-size: .74rem;
    white-space: normal;
    overflow-wrap: anywhere;
  }
}