/* ============================================================
   GLOBAL PLUS — NUC Photo Gallery
   ------------------------------------------------------------
   Dark elegant · gold accents · cinematic feel
   Standalone stylesheet for /gallery/nuc/
   ============================================================ */

/* ----- Design tokens (gallery variant: cooler, deeper) ----- */
:root {
  --g-bg:          #0d0d14;
  --g-bg-2:        #11111a;
  --g-surface:     #161621;
  --g-surface-2:   #1e1e2d;
  --g-deep:        #07070c;

  --g-gold:        #c9a84c;
  --g-gold-soft:   #e8d5a3;
  --g-gold-deep:   #8a7330;
  --g-gold-dim:    rgba(201, 168, 76, 0.35);

  --g-text:        #e8e4dc;
  --g-text-mid:    #b5afa3;
  --g-text-dim:    #8a857a;
  --g-text-faint:  #5a564d;

  --g-line:        rgba(201, 168, 76, 0.18);
  --g-line-strong: rgba(201, 168, 76, 0.40);
  --g-line-faint:  rgba(232, 228, 220, 0.06);

  --font-display:  "Cormorant Garamond", "Times New Roman", Georgia, serif;
  --font-caps:     "Cinzel", "Trajan Pro", serif;
  --font-body:     "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-thai:     "Noto Sans Thai", "Inter", sans-serif;

  --t-xs:  0.6875rem;  /* 11 */
  --t-sm:  0.8125rem;  /* 13 */
  --t-base: 0.9375rem; /* 15 */
  --t-md:  1.0625rem;  /* 17 */
  --t-lg:  1.25rem;    /* 20 */
  --t-xl:  1.75rem;    /* 28 */
  --t-2xl: 2.5rem;     /* 40 */
  --t-3xl: 3.5rem;     /* 56 */
  --t-4xl: 5rem;       /* 80 */

  --s-1: 0.25rem;  --s-2: 0.5rem;   --s-3: 0.75rem;
  --s-4: 1rem;     --s-5: 1.5rem;   --s-6: 2rem;
  --s-7: 3rem;     --s-8: 4rem;     --s-9: 6rem;
  --s-10: 8rem;    --s-11: 10rem;

  --max-w: 1320px;
  --gutter: 1.25rem;
}

/* ----- Reset ----- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; background: none; border: 0; color: inherit; }
body {
  font-family: var(--font-body);
  font-size: var(--t-base);
  line-height: 1.65;
  color: var(--g-text-mid);
  background: var(--g-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-image:
    radial-gradient(ellipse at 20% 0%, rgba(201,168,76,0.07) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 100%, rgba(142,115,48,0.05) 0%, transparent 50%);
  background-attachment: fixed;
}
::selection { background: var(--g-gold); color: var(--g-deep); }
:focus-visible { outline: 1px solid var(--g-gold); outline-offset: 3px; }

/* ============================================================
   UTILITY
   ============================================================ */
.ornament {
  display: flex; align-items: center; justify-content: center; gap: var(--s-3);
  color: var(--g-gold);
}
.ornament__line {
  display: block; width: 48px; height: 1px;
  background: linear-gradient(to right, transparent 0%, var(--g-gold) 40%, var(--g-gold) 60%, transparent 100%);
}
.ornament--wide .ornament__line { width: 72px; }
.ornament__diamond { font-size: 0.625rem; line-height: 1; }

.chapter {
  font-family: var(--font-caps);
  font-size: var(--t-xs);
  font-weight: 500;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--g-gold);
  margin-bottom: var(--s-5);
}

/* ============================================================
   MASTHEAD (compact for gallery)
   ============================================================ */
.masthead {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 50;
  padding: var(--s-4) 0;
  background: linear-gradient(to bottom, rgba(7,7,12,0.92) 0%, rgba(7,7,12,0.65) 60%, transparent 100%);
  backdrop-filter: blur(8px) saturate(1.2);
  border-bottom: 1px solid var(--g-line);
}
.masthead__inner {
  display: flex; align-items: center; justify-content: space-between;
  max-width: var(--max-w); margin: 0 auto; padding: 0 var(--gutter);
  gap: var(--s-4);
}
.brand__logo {
  display: block; width: 100px; height: auto; object-fit: contain;
  filter: brightness(1.1);
}
.brand__title {
  font-family: var(--font-caps);
  font-size: 0.75rem; font-weight: 400;
  letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--g-gold-soft);
  display: none;
}
.nav__list {
  display: flex; align-items: center; gap: var(--s-5);
}
.nav__link {
  font-family: var(--font-caps);
  font-size: 0.6875rem; font-weight: 400;
  letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--g-text-dim);
  padding: var(--s-2) 0;
  transition: color 300ms ease;
  position: relative;
}
.nav__link:hover { color: var(--g-gold); }
.nav__link::after {
  content: ""; position: absolute; left: 50%; right: 50%; bottom: -2px;
  height: 1px; background: var(--g-gold);
  transition: left 350ms ease, right 350ms ease;
}
.nav__link:hover::after { left: 0; right: 0; }
.nav__link--cta {
  border: 1px solid var(--g-line-strong);
  padding: 0.55rem 1.1rem; color: var(--g-gold);
}
.nav__link--cta::after { display: none; }
.nav__link--cta:hover {
  background: var(--g-gold); color: var(--g-deep); border-color: var(--g-gold);
}
.nav__toggle {
  display: none; flex-direction: column; justify-content: center;
  gap: 5px; width: 40px; height: 40px; padding: 10px;
}
.nav__toggle-bar { width: 18px; height: 1px; background: var(--g-gold); }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 85vh;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center;
  padding: calc(var(--s-10) + 2rem) var(--gutter) var(--s-9);
  overflow: hidden; isolation: isolate;
}
.hero__bg {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center 30%;
  z-index: -3;
  opacity: 0.15;
  filter: saturate(0.85) brightness(0.7);
}
.hero__vignette {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse at 50% 45%, rgba(13,13,20,0.55) 0%, rgba(7,7,12,0.85) 60%, var(--g-deep) 100%),
    linear-gradient(to bottom, rgba(7,7,12,0.7) 0%, rgba(7,7,12,0.1) 30%, rgba(7,7,12,0.1) 60%, rgba(7,7,12,0.9) 100%);
  z-index: -1; pointer-events: none;
}
.hero__glow {
  position: absolute; inset: -10% -10% auto -10%; height: 70%;
  background: radial-gradient(ellipse at 50% 0%, rgba(201,168,76,0.12) 0%, rgba(201,168,76,0.04) 35%, transparent 60%);
  z-index: -1; pointer-events: none;
}
.hero__content {
  display: flex; flex-direction: column; align-items: center;
  max-width: 800px; position: relative;
}
.hero__kicker {
  font-family: var(--font-caps);
  font-size: var(--t-xs); font-weight: 500;
  letter-spacing: 0.42em; text-transform: uppercase;
  color: var(--g-gold-soft);
  margin-bottom: var(--s-6);
  text-shadow: 0 0 20px rgba(0,0,0,0.6);
}
.hero__title {
  font-family: var(--font-display);
  font-weight: 300; font-size: var(--t-3xl);
  line-height: 0.95; letter-spacing: -0.02em;
  color: var(--g-text); margin-bottom: var(--s-4);
}
.hero__title-line { display: block; }
.hero__rule {
  width: 1px; height: 48px;
  background: linear-gradient(to bottom, transparent 0%, var(--g-gold) 50%, transparent 100%);
  margin: var(--s-3) auto var(--s-5);
}
.hero__subtitle {
  font-family: var(--font-display);
  font-style: italic; font-weight: 400; font-size: var(--t-lg);
  color: var(--g-text-mid); letter-spacing: 0.02em;
  margin-bottom: var(--s-2);
}
.hero__date {
  font-family: var(--font-caps);
  font-size: var(--t-sm); font-weight: 500;
  letter-spacing: 0.28em; text-transform: uppercase;
  color: var(--g-gold);
}
.hero__scroll {
  position: absolute; bottom: var(--s-6); left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: var(--s-2);
  color: var(--g-text-dim);
  font-family: var(--font-caps); font-size: 0.6rem;
  letter-spacing: 0.3em; text-transform: uppercase;
  animation: heroBounce 2.5s ease-in-out infinite;
}
.hero__scroll-line {
  width: 1px; height: 32px;
  background: linear-gradient(to bottom, var(--g-gold), transparent);
}
@keyframes heroBounce {
  0%, 100% { transform: translateX(-50%) translateY(0); opacity: 0.6; }
  50% { transform: translateX(-50%) translateY(6px); opacity: 1; }
}

/* ============================================================
   SECTION COMMON
   ============================================================ */
.section {
  padding: var(--s-9) var(--gutter);
  position: relative;
}
.section__inner {
  max-width: var(--max-w); margin: 0 auto;
}
.section__head {
  text-align: center; max-width: 640px; margin: 0 auto var(--s-8);
  display: flex; flex-direction: column; align-items: center;
}
.section__title {
  font-family: var(--font-display);
  font-weight: 300; font-size: var(--t-2xl);
  line-height: 1.05; letter-spacing: -0.01em;
  color: var(--g-text);
}
.section__rule {
  width: 60px; height: 1px;
  background: var(--g-gold); margin: var(--s-4) auto;
}
.section__lead {
  font-family: var(--font-display);
  font-style: italic; font-size: var(--t-md);
  line-height: 1.6; color: var(--g-text-mid); max-width: 48ch;
}

/* ============================================================
   PHOTO GRID — masonry via CSS columns
   ============================================================ */
.photo-section { padding-top: var(--s-9); }
.photo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--s-4);
}
.photo-item {
  position: relative;
  overflow: hidden;
  cursor: pointer;
  background: var(--g-surface);
  border: 1px solid var(--g-line);
  aspect-ratio: 4 / 3;
  transition: border-color 350ms ease, transform 500ms ease, box-shadow 500ms ease;
}
.photo-item:hover {
  border-color: var(--g-gold-dim);
  transform: translateY(-3px);
  box-shadow: 0 20px 40px -15px rgba(0,0,0,0.45);
}
.photo-item__img {
  display: block; width: 100%; height: 100%; object-fit: cover;
  transition: transform 800ms cubic-bezier(0.2,0.6,0.2,1), filter 500ms ease;
  filter: saturate(0.9) brightness(0.92);
}
.photo-item:hover .photo-item__img {
  transform: scale(1.04);
  filter: saturate(1) brightness(1);
}

/* Small natural badge on VIP photos */
.photo-item__badge {
  position: absolute; top: var(--s-3); left: var(--s-3);
  z-index: 3;
  font-family: var(--font-caps);
  font-size: 0.55rem; font-weight: 500;
  letter-spacing: 0.15em; text-transform: uppercase;
  padding: 0.3rem 0.55rem;
  border: 1px solid var(--g-gold);
  backdrop-filter: blur(6px);
  pointer-events: none;
}
.photo-item__badge--royal {
  background: rgba(201,168,76,0.18); color: var(--g-gold-soft);
}
.photo-item__badge--gov {
  background: rgba(142,115,48,0.22); color: var(--g-gold-soft); border-color: var(--g-gold-deep);
}
.photo-item__badge--vip {
  background: rgba(138,133,122,0.12); color: var(--g-text-mid); border-color: var(--g-text-dim);
}

.photo-item__overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(7,7,12,0.7) 0%, transparent 50%);
  opacity: 0; transition: opacity 400ms ease;
  display: flex; align-items: flex-end; justify-content: space-between;
  padding: var(--s-4);
}
.photo-item:hover .photo-item__overlay { opacity: 1; }
.photo-item__caption {
  font-family: var(--font-caps);
  font-size: 0.6rem; font-weight: 400;
  letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--g-gold-soft);
}
.photo-item__zoom {
  width: 32px; height: 32px;
  border: 1px solid var(--g-gold);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--g-gold); font-size: 1rem; line-height: 1;
  opacity: 0; transform: translateY(8px);
  transition: opacity 350ms ease, transform 350ms ease, background 300ms ease;
}
.photo-item:hover .photo-item__zoom {
  opacity: 1; transform: translateY(0);
}
.photo-item__zoom:hover {
  background: var(--g-gold); color: var(--g-deep);
}

/* ============================================================
   FILTER TABS
   ============================================================ */
.filter-bar {
  display: flex; flex-wrap: wrap; gap: var(--s-2); justify-content: center;
  margin-bottom: var(--s-7);
}
.filter-btn {
  font-family: var(--font-caps);
  font-size: 0.6875rem; font-weight: 500;
  letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--g-text-dim);
  padding: 0.6rem 1.2rem;
  border: 1px solid var(--g-line);
  background: transparent;
  transition: all 350ms ease;
}
.filter-btn:hover { border-color: var(--g-gold); color: var(--g-gold); }
.filter-btn.is-active {
  background: var(--g-gold); color: var(--g-deep); border-color: var(--g-gold);
}

/* ============================================================
   LIGHTBOX
   ============================================================ */
.lightbox {
  position: fixed; inset: 0;
  z-index: 200;
  background: rgba(7,7,12,0.96);
  backdrop-filter: blur(12px);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden;
  transition: opacity 350ms ease, visibility 350ms ease;
}
.lightbox.is-open { opacity: 1; visibility: visible; }
.lightbox__stage {
  position: relative;
  width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
  padding: var(--s-7) var(--s-5);
}
.lightbox__img {
  max-width: 100%; max-height: 100%;
  object-fit: contain;
  box-shadow: 0 40px 80px -20px rgba(0,0,0,0.7);
  opacity: 0; transform: scale(0.96);
  transition: opacity 400ms ease, transform 400ms cubic-bezier(0.2,0.6,0.2,1);
}
.lightbox.is-open .lightbox__img.is-loaded {
  opacity: 1; transform: scale(1);
}
.lightbox__close {
  position: absolute; top: var(--s-5); right: var(--s-5);
  width: 44px; height: 44px;
  border: 1px solid var(--g-line-strong);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--g-gold); font-size: 1.25rem;
  transition: all 300ms ease; z-index: 10;
}
.lightbox__close:hover { background: var(--g-gold); color: var(--g-deep); border-color: var(--g-gold); }
.lightbox__nav {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 48px; height: 48px;
  border: 1px solid var(--g-line-strong);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--g-gold); font-size: 1.1rem;
  transition: all 300ms ease; z-index: 10;
}
.lightbox__nav:hover { background: var(--g-gold); color: var(--g-deep); border-color: var(--g-gold); }
.lightbox__nav--prev { left: var(--s-4); }
.lightbox__nav--next { right: var(--s-4); }
.lightbox__meta {
  position: absolute; bottom: var(--s-5); left: 0; right: 0;
  text-align: center; padding: 0 var(--gutter);
}
.lightbox__caption {
  font-family: var(--font-display);
  font-size: var(--t-lg); font-weight: 400;
  color: var(--g-text); letter-spacing: 0.02em;
}
.lightbox__counter {
  font-family: var(--font-caps);
  font-size: 0.625rem; font-weight: 400;
  letter-spacing: 0.28em; text-transform: uppercase;
  color: var(--g-text-dim); margin-top: var(--s-2);
}
.lightbox__loader {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 40px; height: 40px;
  border: 2px solid var(--g-line);
  border-top-color: var(--g-gold);
  border-radius: 50%;
  animation: spin 800ms linear infinite;
}
@keyframes spin { to { transform: translate(-50%, -50%) rotate(360deg); } }

/* ============================================================
   FOOTER
   ============================================================ */
.gallery-footer {
  background: var(--g-deep);
  border-top: 1px solid var(--g-line);
  padding: var(--s-8) var(--gutter) var(--s-6);
  text-align: center;
}
.gallery-footer__inner {
  max-width: var(--max-w); margin: 0 auto;
  display: flex; flex-direction: column; align-items: center; gap: var(--s-5);
}
.gallery-footer__brand {
  font-family: var(--font-display);
  font-style: italic; font-size: var(--t-lg);
  color: var(--g-text);
}
.gallery-footer__tag {
  font-family: var(--font-caps);
  font-size: 0.625rem; font-weight: 500;
  letter-spacing: 0.28em; text-transform: uppercase;
  color: var(--g-text-dim);
}
.gallery-footer__links {
  display: flex; flex-wrap: wrap; gap: var(--s-6); justify-content: center;
}
.gallery-footer__links a {
  font-family: var(--font-caps);
  font-size: 0.6875rem; font-weight: 400;
  letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--g-text-dim); transition: color 300ms ease;
}
.gallery-footer__links a:hover { color: var(--g-gold); }
.gallery-footer__copy {
  font-family: var(--font-caps);
  font-size: 0.6rem; font-weight: 400;
  letter-spacing: 0.28em; text-transform: uppercase;
  color: var(--g-text-faint);
  padding-top: var(--s-4); margin-top: var(--s-2);
  border-top: 1px solid var(--g-line-faint); width: 100%;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (min-width: 768px) {
  :root { --t-2xl: 3rem; --t-3xl: 4.5rem; --t-4xl: 6.5rem; --gutter: 2rem; }
  .brand__title { display: block; }
  .hero { min-height: 90vh; }
  .photo-grid { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
}
@media (min-width: 1024px) {
  :root { --t-3xl: 5.5rem; --gutter: 2.5rem; }
  .photo-grid { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
}
@media (min-width: 1280px) {
  .photo-grid { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
}

/* Mobile nav */
@media (max-width: 767px) {
  .nav__list {
    position: fixed; top: 0; right: -100%;
    width: min(80vw, 300px); height: 100vh;
    flex-direction: column; justify-content: center; align-items: flex-start;
    gap: var(--s-6); padding: var(--s-9) var(--s-6);
    background: var(--g-deep); border-left: 1px solid var(--g-line);
    box-shadow: -20px 0 60px rgba(0,0,0,0.5);
    transition: right 400ms ease; z-index: 60;
  }
  .nav__list.is-open { right: 0; }
  .nav__toggle { display: flex; position: relative; z-index: 70; }
  .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; }
  .nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

  .lightbox__nav { width: 40px; height: 40px; }
  .lightbox__nav--prev { left: var(--s-2); }
  .lightbox__nav--next { right: var(--s-2); }
  .lightbox__caption { font-size: var(--t-md); }
}

/* ============================================================
   REDUCED MOTION
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ============================================================
   SCROLL REVEAL
   ============================================================ */
.reveal {
  opacity: 0; transform: translateY(20px);
  transition: opacity 900ms ease, transform 900ms ease;
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }