/*
 * assets/css/layout.css
 * Global page layout: site shell, sticky header, navigation, content
 * widths, section spacing, and site footer.
 *
 * Component-specific visual styles belong in components.css.
 * Page-specific layout overrides belong in assets/css/pages/.
 */

/* ================================
   PAGE SHELL
================================ */

.page-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.page-main {
  flex: 1;
}

/* ================================
   CONTENT WIDTH CONTAINERS
================================ */

.container {
  width: 100%;
  max-width: var(--content-width-xl);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

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

/* ================================
   SECTION SPACING
================================ */

.section {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}

.section--sm {
  padding-top: var(--space-10);
  padding-bottom: var(--space-10);
}

.section--lg {
  padding-top: var(--space-20);
  padding-bottom: var(--space-20);
}

/* Alternating surface color for visual rhythm between sections */
.section--alt-bg {
  background-color: var(--color-bg-surface);
}

/* ================================
   SECTION HEADERS
================================ */

.section-header {
  margin-bottom: var(--space-10);
}

.section-header--centered {
  text-align: center;
}

.section-title {
  font-size: var(--text-2xl);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
}

@media (min-width: 768px) {
  .section-title {
    font-size: var(--text-3xl);
  }
}

.section-subtitle {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  max-width: 65ch;
}

.section-header--centered .section-subtitle {
  margin-left: auto;
  margin-right: auto;
}

/* ================================
   SITE HEADER
================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  background-color: var(--color-bg-surface);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--content-width-xl);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

/* --- Wordmark --- */
.site-header__wordmark {
  display: flex;
  align-items: center;
  color: var(--color-text-primary);
  text-decoration: none;
  flex-shrink: 0;
  transition: color 0.15s ease;
}

.site-header__wordmark:hover {
  color: var(--color-gold);
}

.site-header__studio-name {
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-wider);
  color: inherit;
}

/* ================================
   HAMBURGER TOGGLE (mobile)
================================ */

.nav-toggle {
  /* Ensure minimum 44px tap target per accessibility rules */
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  border-radius: var(--radius-md);
  transition: background-color 0.15s ease;
}

.nav-toggle:hover {
  background-color: var(--color-gold-subtle);
}

.nav-toggle:focus-visible {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
}

.nav-toggle__icon {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 20px;
  height: 14px;
  pointer-events: none;
}

.nav-toggle__bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text-primary);
  border-radius: var(--radius-pill);
  transition: transform 0.2s ease, opacity 0.2s ease, background-color 0.15s ease;
}

.nav-toggle:hover .nav-toggle__bar {
  background-color: var(--color-gold);
}

/* Animate bars to × when open */
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* ================================
   NAVIGATION — mobile first
================================ */

/* Hidden by default on mobile; revealed by JS when toggle is activated */
.site-nav {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background-color: var(--color-bg-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-3) 0;
  box-shadow: var(--shadow-md);
  z-index: 99;
}

.site-nav.is-open {
  display: block;
}

.site-nav__list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.site-nav__item {
  list-style: none;
}

.site-nav__link {
  display: flex;
  align-items: center;
  /* 44px minimum tap target height */
  min-height: 44px;
  padding: 0 var(--space-6);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color 0.15s ease, background-color 0.15s ease;
}

.site-nav__link:hover {
  color: var(--color-gold);
  background-color: var(--color-gold-subtle);
}

.site-nav__link:focus-visible {
  outline: 2px solid var(--color-border-focus);
  outline-offset: -2px;
}

.site-nav__link.is-active {
  color: var(--color-gold);
}

.site-nav__item--action-group-start {
  margin-top: var(--space-2);
  padding-top: var(--space-2);
  border-top: 1px solid var(--color-border-subtle);
}

.site-nav__link--button {
  justify-content: center;
  margin: var(--space-2) var(--space-6) 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-bg-raised);
}

.site-nav__link--button-secondary {
  color: var(--color-text-primary);
}

.site-nav__link--button-secondary:hover,
.site-nav__link--button-secondary.is-active {
  background-color: var(--color-gold-subtle);
  border-color: var(--color-gold-muted);
  color: var(--color-gold);
}

.site-nav__link--button-primary {
  background-color: var(--color-gold);
  border-color: var(--color-gold);
  color: var(--color-text-on-gold);
}

.site-nav__link--button-primary:hover,
.site-nav__link--button-primary.is-active {
  background-color: var(--color-gold-hover);
  border-color: var(--color-gold-hover);
  color: var(--color-text-on-gold);
}

.site-nav__link--button-ghost {
  background-color: transparent;
  border-color: transparent;
  color: var(--color-gold);
}

.site-nav__link--button-ghost:hover,
.site-nav__link--button-ghost.is-active {
  background-color: var(--color-gold-subtle);
  border-color: transparent;
  color: var(--color-gold-hover);
}

/* ================================
   NAVIGATION — desktop (768px+)
================================ */

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

  /* Reset fixed positioning; show inline within the flex header */
  .site-nav {
    display: flex;
    position: static;
    background: none;
    border: none;
    padding: 0;
    box-shadow: none;
    z-index: auto;
  }

  .site-nav__list {
    display: flex;
    align-items: center;
    gap: var(--space-1);
  }

  .site-nav__item--action-group-start {
    margin-top: 0;
    padding-top: 0;
    padding-left: var(--space-3);
    margin-left: var(--space-3);
    border-top: none;
  }

  .site-nav__link {
    min-height: auto;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
  }

  .site-nav__link--button {
    min-height: 44px;
    margin: 0;
    padding: var(--space-3) var(--space-5);
  }
}

/* ================================
   SITE FOOTER
================================ */

.site-footer {
  background-color: var(--color-bg-surface);
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-12);
  padding-bottom: var(--space-8);
}

.site-footer__inner {
  max-width: var(--content-width-xl);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

.site-footer__top {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-10);
}

@media (min-width: 640px) {
  .site-footer__top {
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-12);
  }
}

.site-footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.site-footer__studio-name {
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-wider);
  color: var(--color-text-primary);
}

.site-footer__tagline {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
}

.site-footer__notice {
  display: inline-block;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-3);
  margin-top: var(--space-1);
}

.site-footer__nav-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.site-footer__nav-heading {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-1);
}

.site-footer__nav-link {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color 0.15s ease;
}

.site-footer__nav-link:hover {
  color: var(--color-gold);
}

.site-footer__bottom {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border-subtle);
}

@media (min-width: 640px) {
  .site-footer__bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.site-footer__copyright {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}