/* ========================================
   QUADRVUM - Common Styles
   Modern Minimal
   ======================================== */

/* --- Custom Properties --- */
:root {
  --color-bg: #c9a87c;
  --color-text: #f5f5f5;
  --color-text-dim: rgba(245, 245, 245, 0.45);
  --color-accent: #c45c5c;
  --font-body: 'Poppins', sans-serif;
  --font-display: 'Playfair Display', serif;
  --header-height: 72px;
  --content-padding: 6%;
  --z-loading: 1000;
  --z-nav-overlay: 900;
  --z-header: 800;
  --transition: 0.35s cubic-bezier(0.25, 0, 0.15, 1);
}

/* --- Reset --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

ul, ol {
  list-style: none;
}

/* --- Base --- */
body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 13px;
  letter-spacing: 0.02em;
  line-height: 1.6;
  overflow-x: hidden;
  padding-top: var(--header-height);
  min-height: var(--vh-fixed, 100vh);
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main {
  flex: 1;
  overflow: hidden;
  padding-bottom: 160px;
  margin-bottom: -160px;
}

p { color: var(--color-text); }

a {
  color: var(--color-text);
  text-decoration: none;
  transition: opacity var(--transition);
  -webkit-tap-highlight-color: transparent;
}

a:visited, a:hover, a:active {
  color: var(--color-text);
  text-decoration: none;
}

a:hover { opacity: 0.7; }

img {
  display: block;
  max-width: 100%;
}


/* ========================================
   Loading (first visit only)
   ======================================== */
.loading {
  position: fixed;
  inset: 0;
  z-index: var(--z-loading);
  background-color: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: loadingFadeOut 0.6s 1.2s forwards;
  pointer-events: none;
}

.loading--skip {
  display: none;
}

.loading__logo {
  opacity: 0;
  width: 80px;
  animation: logoFade 1s 0.15s forwards;
}

@keyframes loadingFadeOut {
  to { opacity: 0; visibility: hidden; }
}

@keyframes logoFade {
  0%   { opacity: 0; }
  50%  { opacity: 1; }
  100% { opacity: 0; }
}


/* ========================================
   Page Transition (slide)
   ======================================== */
.page-transition {
  position: fixed;
  inset: 0;
  z-index: var(--z-loading);
  background-color: var(--color-bg);
  transform: translateX(100%);
  will-change: transform;
  pointer-events: none;
}

.page-transition--exit {
  pointer-events: all;
  animation: ptSlideIn 0.5s cubic-bezier(0.45, 0, 0.55, 1) forwards;
}

.page-transition--enter {
  transform: translateX(0);
  animation: ptSlideOut 0.5s cubic-bezier(0.45, 0, 0.55, 1) 0.05s forwards;
}

@keyframes ptSlideIn {
  from { transform: translateX(100%); }
  to   { transform: translateX(0); }
}

@keyframes ptSlideOut {
  from { transform: translateX(0); }
  to   { transform: translateX(-100%); }
}

/* Skip contentFadeIn on return visits */
.page-content--instant {
  opacity: 1 !important;
  animation: none !important;
}


/* ========================================
   Header
   ======================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-header);
  background-color: transparent;
}

.site-header__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: var(--header-height);
  padding: 0 var(--content-padding);
}

.site-header__logo {
  flex-shrink: 0;
}

.site-header__logo img {
  height: 30px;
}


/* ========================================
   Navigation - Desktop
   ======================================== */
.site-nav__list {
  display: flex;
  gap: 36px;
  align-items: center;
}

.site-nav__link {
  font-size: 10px;
  font-weight: 300;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  opacity: 0.5;
  transition: opacity var(--transition);
  position: relative;
}

.site-nav__link:hover {
  opacity: 1;
}

.site-nav__link--active {
  opacity: 1;
}

.site-nav__link--active::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  right: 0;
  height: 1px;
  background-color: var(--color-text);
}

/* --- Hamburger Toggle --- */
.site-nav__toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 24px;
  height: 24px;
  position: relative;
  z-index: calc(var(--z-nav-overlay) + 1);
  -webkit-tap-highlight-color: transparent;
}

.site-nav__toggle-bar {
  display: block;
  width: 100%;
  height: 1px;
  background-color: var(--color-text);
  position: absolute;
  left: 0;
  transition: transform var(--transition), top var(--transition), bottom var(--transition);
}

.site-nav__toggle-bar:first-child {
  top: 7px;
}

.site-nav__toggle-bar:last-child {
  bottom: 7px;
}

.site-nav--open .site-nav__toggle-bar:first-child {
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
}

.site-nav--open .site-nav__toggle-bar:last-child {
  bottom: 50%;
  transform: translateY(50%) rotate(-45deg);
}

/* --- Mobile Nav Overlay --- */
.site-nav__overlay {
  display: none;
}


/* ========================================
   Footer
   ======================================== */
.site-footer {
  position: relative;
  z-index: 1;
  background-color: #b5895f;
  margin-top: 160px;
  padding: 80px var(--content-padding) 48px;
  font-family: var(--font-body);
}

/* --- Brand --- */
.site-footer__brand {
  font-family: 'Cormorant', serif;
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  color: var(--color-text);
  margin-bottom: 28px;
}

/* --- Divider --- */
.site-footer__divider {
  width: 24px;
  height: 1px;
  background-color: var(--color-text);
  opacity: 0.3;
  border: none;
  margin: 0 0 32px;
}

/* --- Navigation --- */
.site-footer__nav {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 40px;
}

.site-footer__nav-link {
  font-family: var(--font-body);
  font-size: 10px;
  font-weight: 300;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  opacity: 0.5;
  transition: opacity var(--transition);
  width: fit-content;
}

.site-footer__nav-link:hover {
  opacity: 1;
}

/* --- SNS --- */
.site-footer__sns {
  display: flex;
  gap: 16px;
  align-items: center;
  margin-bottom: 48px;
  height: 24px;
}

.site-footer__sns li {
  display: flex;
  align-items: center;
  height: 100%;
}

.site-footer__sns a {
  display: flex;
  align-items: center;
  height: 100%;
  opacity: 0.5;
  transition: opacity var(--transition);
}

.site-footer__sns a:hover {
  opacity: 1;
}

.site-footer__sns img {
  height: 13px;
}

.site-footer__sns li:nth-child(1) img {
  position: relative;
  top: 1px;
}

.site-footer__sns li:nth-child(3) img {
  height: 28px;
  position: relative;
  top: 2px;
}

/* --- Tagline --- */
.site-footer__tagline {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(13px, 1.5vw, 16px);
  letter-spacing: 0.04em;
  opacity: 0.35;
  margin-bottom: 48px;
}

/* --- Copyright --- */
.site-footer__copy {
  font-size: 9px;
  letter-spacing: 0.1em;
  opacity: 0.3;
}


/* ========================================
   Shared Animations
   ======================================== */
@keyframes contentFadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes flicker {
  0%   { opacity: 1; }
  5%   { opacity: 0.2; }
  10%  { opacity: 0.8; }
  15%  { opacity: 0.4; }
  20%  { opacity: 0.5; }
  25%  { opacity: 0.5; }
  30%  { opacity: 0.7; }
  35%  { opacity: 0.5; }
  40%  { opacity: 0.9; }
  45%  { opacity: 0.4; }
  50%  { opacity: 0.6; }
  55%  { opacity: 0.4; }
  60%  { opacity: 0.9; }
  65%  { opacity: 0.2; }
  70%  { opacity: 0.9; }
  75%  { opacity: 0.5; }
  80%  { opacity: 0.7; }
  85%  { opacity: 0.3; }
  90%  { opacity: 0.6; }
  95%  { opacity: 0.8; }
  100% { opacity: 1; }
}

/* --- Page content entrance --- */
.page-content {
  opacity: 0;
  animation: contentFadeIn 0.6s 1.0s forwards;
}

/* --- Section heading (shared) --- */
.section-heading {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--color-text);
  margin-bottom: 48px;
}


/* ========================================
   Responsive (800px)
   ======================================== */
@media screen and (max-width: 800px) {
  :root {
    --header-height: 56px;
    --content-padding: 7%;
  }

  .loading__logo {
    width: 60px;
  }

  .site-header__logo img {
    height: 24px;
  }

  /* Show hamburger, hide inline nav */
  .site-nav__toggle {
    display: block;
  }

  .site-nav__list {
    display: none;
  }

  /* Mobile overlay nav */
  .site-nav__overlay {
    position: fixed;
    inset: 0;
    z-index: var(--z-nav-overlay);
    background-color: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    transform: translateX(100%);
    transition: transform 0.5s cubic-bezier(0.45, 0, 0.55, 1);
    will-change: transform;
  }

  .site-nav__overlay ul {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 32px;
  }

  .site-nav__overlay .site-nav__link {
    font-size: 14px;
    letter-spacing: 0.25em;
    opacity: 0;
    transform: translateY(10px);
    display: block;
    padding: 12px 24px;
    -webkit-tap-highlight-color: transparent;
  }

  .site-nav__overlay .site-nav__link--active {
    opacity: 0;
  }

  .site-nav__overlay .site-nav__link--active::after {
    display: none;
  }

  /* Open state */
  .site-nav--open .site-nav__overlay {
    transform: translateX(0);
  }

  .site-nav--open .site-nav__overlay .site-nav__link {
    opacity: 0.5;
    transform: translateY(0);
    transition: opacity 0.4s, transform 0.4s;
  }

  .site-nav--open .site-nav__overlay .site-nav__link--active {
    opacity: 1;
  }

  .site-nav--open .site-nav__overlay li:nth-child(1) .site-nav__link { transition-delay: 0.2s; }
  .site-nav--open .site-nav__overlay li:nth-child(2) .site-nav__link { transition-delay: 0.26s; }
  .site-nav--open .site-nav__overlay li:nth-child(3) .site-nav__link { transition-delay: 0.32s; }
  .site-nav--open .site-nav__overlay li:nth-child(4) .site-nav__link { transition-delay: 0.38s; }

  main {
    padding-bottom: 100px;
    margin-bottom: -100px;
  }

  .section-heading {
    margin-bottom: 32px;
  }

  .site-footer {
    margin-top: 100px;
    padding: 56px var(--content-padding) 36px;
  }

  .site-footer__brand {
    margin-bottom: 24px;
  }

  .site-footer__divider {
    margin-bottom: 24px;
  }

  .site-footer__nav {
    gap: 12px;
    margin-bottom: 32px;
  }

  .site-footer__sns {
    margin-bottom: 36px;
  }

  .site-footer__tagline {
    margin-bottom: 36px;
  }
}