/* ============================================================
   BYDURAN.CO — Layout System
   Containers, grid utilities, nav, footer, section spacing
   ============================================================ */

/* ── Skip link ───────────────────────────────────────────── */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--sp-4);
  z-index: 9999;
  background: var(--espresso);
  color: var(--cream);
  padding: var(--sp-3) var(--sp-6);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wide);
  text-decoration: none;
  border-radius: var(--radius-xs);
  transition: top 0.15s;
}
.skip-link:focus {
  top: var(--sp-4);
}

/* ── Containers ──────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container--narrow {
  max-width: var(--container-md);
}

.container--wide {
  max-width: var(--container-2xl);
}

.container--full {
  max-width: var(--container-full);
  padding-inline: var(--gutter);
}

/* ── Section spacing ──────────────────────────────────────── */
.section-pad {
  padding-block: var(--section-v);
}

.section-pad--sm {
  padding-block: calc(var(--section-v) * 0.6);
}

.section-pad--lg {
  padding-block: calc(var(--section-v) * 1.4);
}

/* Utility: screen reader only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border-width: 0;
}

/* ============================================================
   NAVIGATION
   ============================================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: var(--z-nav);
  transition:
    background-color var(--dur-mid) var(--ease-luxury),
    box-shadow var(--dur-mid) var(--ease-luxury);
}

.nav--scrolled {
  background-color: var(--olive-dark);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--color-border-dark);
}

.nav--light {
  background-color: var(--olive-dark);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.nav--light .nav__link {
  color: rgba(245, 245, 235, 0.75);
}

.nav--light .nav__logo-script {
  color: var(--cream);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding-inline: var(--gutter);
  max-width: var(--container-full);
  margin-inline: auto;
}

/* Logo */
.nav__logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

.nav__logo-script {
  font-family: var(--font-script);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  color: var(--cream);
  letter-spacing: 0.01em;
  transition: opacity var(--dur-fast) var(--ease-out);
  line-height: 1;
}

.nav__logo:hover .nav__logo-script {
  opacity: 0.7;
}

/* Desktop links */
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--sp-8);
}

.nav__link {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: rgba(245, 245, 235, 0.75);
  text-decoration: none;
  padding-block: var(--sp-2);
  position: relative;
  transition: color var(--dur-fast) var(--ease-out);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--cream);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--dur-mid) var(--ease-luxury);
}

.nav__link:hover,
.nav__link--active {
  color: var(--cream);
}

.nav__link:hover::after,
.nav__link--active::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* Hamburger */
.nav__menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  cursor: pointer;
  background: none;
  border: none;
  padding: var(--sp-2);
}

.nav__menu-btn span {
  display: block;
  width: 28px;
  height: 1.5px;
  background: var(--cream);
  transition: all var(--dur-mid) var(--ease-luxury);
  transform-origin: center;
}

.nav__menu-btn[aria-expanded="true"] span:first-child {
  transform: translateY(6px) rotate(45deg);
}

/* Middle bar fades and collapses when open */
.nav__menu-btn[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav__menu-btn[aria-expanded="true"] span:last-child {
  transform: translateY(-6px) rotate(-45deg);
}

/* Nav gets solid background when mobile menu is open (even on transparent-nav pages) */
.nav--menu-open {
  background-color: var(--olive-dark) !important;
  backdrop-filter: blur(12px) !important;
  -webkit-backdrop-filter: blur(12px) !important;
}

/* Mobile menu — below the nav bar in z-order so the hamburger/X stays on top */
.nav__mobile {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--olive-dark);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding-top: var(--nav-height); /* push links below the nav bar */
  gap: var(--sp-8);
  opacity: 0;
  transition:
    opacity var(--dur-slow) var(--ease-luxury);
  z-index: calc(var(--z-nav) - 10); /* 90 — nav (100) stays on top */
}

/* JS adds .is-open to open the menu */
.nav__mobile.is-open {
  display: flex;
  opacity: 1;
}

.nav__mobile-link {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: var(--weight-light);
  font-style: italic;
  color: var(--cream);
  letter-spacing: var(--tracking-tight);
  transition: color var(--dur-fast) var(--ease-out);
}

.nav__mobile-link:hover {
  color: var(--sand);
}

/* ============================================================
   FOOTER LAYOUT
   ============================================================ */
.footer {
  background-color: var(--olive-dark);
  color: var(--cream);
}

.footer__inner {
  max-width: var(--container-full);
  margin-inline: auto;
  padding-inline: var(--gutter);
  padding-block: var(--sp-20) var(--sp-10);
}

.footer__top {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--sp-16);
  padding-bottom: var(--sp-12);
  border-bottom: 1px solid var(--color-border-dark);
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

.footer__logo {
  font-family: var(--font-script);
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--cream);
  line-height: 1;
  transition: opacity var(--dur-fast);
}

.footer__logo:hover {
  opacity: 0.7;
}

.footer__tagline {
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-wide);
  color: rgba(245, 245, 235, 0.5);
  text-transform: uppercase;
  font-weight: var(--weight-medium);
  max-width: none;
}

.footer__location {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--text-xs);
  color: rgba(245, 245, 235, 0.4);
  max-width: none;
}

.footer__nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-8);
}

.footer__nav-heading {
  display: block;
  font-size: var(--text-2xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: rgba(245, 245, 235, 0.35);
  margin-bottom: var(--sp-4);
}

.footer__nav-col {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

.footer__nav-col a {
  font-size: var(--text-sm);
  color: rgba(245, 245, 235, 0.6);
  transition: color var(--dur-fast) var(--ease-out);
}

.footer__nav-col a:hover {
  color: var(--cream);
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--sp-8);
  flex-wrap: wrap;
  gap: var(--sp-4);
}

.footer__copy {
  font-size: var(--text-xs);
  color: rgba(245, 245, 235, 0.35);
  max-width: none;
}

.footer__script-name {
  font-family: var(--font-script);
  font-size: clamp(1.4rem, 3vw, 2rem);
  color: rgba(245, 245, 235, 0.2);
  line-height: 1;
  pointer-events: none;
}

.footer__legal {
  font-size: var(--text-xs);
  color: rgba(245, 245, 235, 0.35);
  max-width: none;
}

.footer__legal a {
  color: rgba(245, 245, 235, 0.35);
  transition: color var(--dur-fast);
}

.footer__legal a:hover {
  color: var(--sand);
}

/* ============================================================
   SHARED COMPONENTS — Buttons, Labels, Utilities
   ============================================================ */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-4) var(--sp-8);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  text-decoration: none;
  border-radius: var(--radius-xs);
  transition:
    background-color var(--dur-mid) var(--ease-luxury),
    color var(--dur-mid) var(--ease-luxury),
    border-color var(--dur-mid) var(--ease-luxury),
    box-shadow var(--dur-mid) var(--ease-luxury),
    transform var(--dur-fast) var(--ease-out);
  cursor: pointer;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

/* Solid: olive fill */
.btn--solid {
  background-color: var(--olive-dark);
  color: var(--cream-light);
  border: 1px solid var(--olive-dark);
}

.btn--solid:hover {
  background-color: var(--espresso-soft);
  border-color: var(--espresso-soft);
  box-shadow: var(--shadow-md);
}

/* Outline: dark border */
.btn--outline {
  background-color: transparent;
  color: var(--espresso);
  border: 1px solid var(--espresso);
}

.btn--outline:hover {
  background-color: var(--espresso-soft);
  color: var(--cream);
}

/* Outline light: for dark backgrounds */
.btn--outline-light {
  background-color: transparent;
  color: var(--cream);
  border: 1px solid rgba(245, 245, 235, 0.5);
}

.btn--outline-light:hover {
  background-color: var(--cream);
  color: var(--espresso);
  border-color: var(--cream);
}

/* Label tags */
.label-tag {
  display: inline-block;
  font-size: var(--text-2xs);
  font-family: var(--font-body);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--olive-light);
  padding: var(--sp-1) 0;
  margin-bottom: var(--sp-4);
}

.label-tag--light {
  color: rgba(145, 134, 116, 0.75);
}

/* ============================================================
   RESPONSIVE BREAKPOINTS
   ============================================================ */

/* Tablet landscape and below (≤1024px) */
@media (max-width: 1024px) {

  .footer__top {
    grid-template-columns: 1fr;
    gap: var(--sp-10);
  }

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

/* Tablet portrait (≤768px) */
@media (max-width: 768px) {

  .nav__links {
    display: none;
  }

  .nav__menu-btn {
    display: flex;
  }

  .footer__nav {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--sp-8);
  }

  .footer__bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--sp-3);
  }

  .footer__script-name {
    display: none;
  }
}

/* Mobile (≤480px) */
@media (max-width: 480px) {

  .footer__nav {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--sp-4);
  }

  .btn {
    padding: var(--sp-3) var(--sp-6);
  }
}

/* ── Scroll-to-top button ─────────────────────────────────── */
.scroll-top {
  position: fixed;
  bottom: var(--sp-8);
  right: var(--gutter);
  z-index: var(--z-float);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-3);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  opacity: 0;
  transform: translateY(10px);
  transition:
    opacity var(--dur-mid) var(--ease-luxury),
    transform var(--dur-mid) var(--ease-luxury);
  pointer-events: none;
  mix-blend-mode: difference;
}

.scroll-top.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.scroll-top__line {
  width: 1px;
  height: 48px;
  background: #fff;
  animation: scrollPulseUp 2.2s var(--ease-luxury) infinite;
}

.scroll-top__label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: #fff;
  transform: rotate(90deg);
  white-space: nowrap;
}

@media (max-width: 600px) {
  .scroll-top {
    bottom: var(--sp-5);
    right: var(--sp-5);
  }
}