/* ============================================================
   Xiaotong (Alissa) Zhu — Fashion Portfolio
   ============================================================ */

:root {
  --bg:        #f4f1ec;
  --bg-alt:    #e8e6e1;
  --ink:       #20232a;
  --ink-soft:  #555a64;
  --line:      #c9c4ba;
  --accent:    #8a9bb5;   /* dusty blue from cover */
  --accent-dk: #5e6f8c;
  --cream:     #faf8f4;
  --shadow:    0 24px 60px -28px rgba(32,35,42,.45);

  --serif: "Cormorant Garamond", Georgia, serif;
  --sans:  "Jost", system-ui, -apple-system, sans-serif;

  --ease: cubic-bezier(.22,.61,.36,1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-weight: 300;
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

::selection { background: var(--accent); color: #fff; }

/* ---------- Scroll progress ---------- */
.scroll-progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 0%;
  background: var(--accent-dk); z-index: 200;
  transition: width .1s linear;
}

/* ---------- Navigation ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.5rem clamp(1.25rem, 5vw, 4rem);
  transition: background .5s var(--ease), padding .5s var(--ease), box-shadow .5s var(--ease);
}
.nav--scrolled {
  background: rgba(244,241,236,.86);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  padding-top: .9rem; padding-bottom: .9rem;
  box-shadow: 0 1px 0 var(--line);
}
.nav__brand {
  font-family: var(--serif); font-size: 1.5rem; font-weight: 600;
  letter-spacing: .02em; color: var(--ink); text-decoration: none;
  transition: opacity .4s var(--ease), color .5s var(--ease);
}
.nav:not(.nav--scrolled) .nav__brand,
.nav:not(.nav--scrolled) .nav__links a { color: #fff; }
.nav__brand:hover { opacity: .65; }

.nav__links { display: flex; gap: clamp(1.25rem, 3vw, 2.75rem); }
.nav__links a {
  position: relative; text-decoration: none; color: var(--ink);
  font-size: .82rem; letter-spacing: .14em; text-transform: uppercase;
  font-weight: 400; padding: .25rem 0; transition: color .5s var(--ease);
}
.nav__links a::after {
  content: ""; position: absolute; left: 0; bottom: -2px; height: 1px; width: 0;
  background: currentColor; transition: width .35s var(--ease);
}
.nav__links a:hover::after, .nav__links a.is-active::after { width: 100%; }

.nav__toggle { display: none; background: none; border: 0; cursor: pointer;
  width: 30px; height: 22px; position: relative; z-index: 110; }
.nav__toggle span {
  position: absolute; left: 0; height: 2px; width: 100%; background: var(--ink);
  transition: transform .4s var(--ease), opacity .3s var(--ease), background .5s;
}
.nav:not(.nav--scrolled) .nav__toggle span { background: #fff; }
.nav__toggle span:nth-child(1) { top: 0; }
.nav__toggle span:nth-child(2) { top: 10px; }
.nav__toggle span:nth-child(3) { top: 20px; }

/* ---------- Hero ---------- */
.hero {
  position: relative; height: 100svh; min-height: 560px;
  display: flex; flex-direction: column; justify-content: center;
  padding: 0 clamp(1.5rem, 7vw, 6rem); overflow: hidden;
}
.hero__media { position: absolute; inset: 0; z-index: -1; will-change: transform; }
.hero__media img { width: 100%; height: 120%; object-fit: cover; object-position: center 30%; }
.hero__scrim {
  position: absolute; inset: 0;
  background: linear-gradient(105deg, rgba(20,24,36,.55) 0%, rgba(20,24,36,.2) 45%, rgba(40,46,60,.15) 100%);
}
.hero__content { max-width: 1100px; color: #fff; }
.hero__eyebrow {
  font-size: clamp(.7rem,1.4vw,.85rem); letter-spacing: .42em; text-transform: uppercase;
  font-weight: 400; margin-bottom: 1.4rem; opacity: .9;
}
.hero__title {
  font-family: var(--serif); font-weight: 500; line-height: .96;
  font-size: clamp(3.2rem, 13vw, 11rem); letter-spacing: -.01em;
}
.hero__title span { display: block; }
.hero__alias { font-style: italic; font-weight: 400; opacity: .92; }
.hero__sub {
  margin-top: 1.6rem; font-size: clamp(1rem,2.2vw,1.4rem);
  letter-spacing: .12em; font-weight: 300; opacity: .92;
}
.hero__cue {
  position: absolute; bottom: 2.2rem; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: .6rem;
  color: #fff; text-decoration: none; font-size: .72rem; letter-spacing: .3em;
  text-transform: uppercase; opacity: .85;
}
.hero__cue-line { width: 1px; height: 46px; background: #fff; transform-origin: top;
  animation: cue 1.9s var(--ease) infinite; }
@keyframes cue { 0%{transform:scaleY(0);opacity:0} 40%{transform:scaleY(1);opacity:1} 100%{transform:scaleY(1) translateY(46px);opacity:0} }

/* ---------- Intro ---------- */
.intro { padding: clamp(5rem, 12vw, 11rem) clamp(1.5rem, 7vw, 6rem); }
.intro__inner { max-width: 1000px; margin: 0 auto; }
.intro__label {
  font-size: .78rem; letter-spacing: .3em; text-transform: uppercase;
  color: var(--accent-dk); margin-bottom: 2rem;
}
.intro__lead {
  font-family: var(--serif); font-size: clamp(1.7rem, 4.2vw, 3.1rem);
  line-height: 1.18; font-weight: 500; letter-spacing: -.01em;
}
.intro__body {
  margin-top: 2rem; max-width: 640px; font-size: clamp(1rem,1.4vw,1.12rem);
  color: var(--ink-soft);
}

/* ---------- Project sections ---------- */
.project { padding: clamp(3rem, 7vw, 7rem) 0 clamp(4rem,9vw,9rem); }
.project--alt { background: var(--bg-alt); }
.project__head { padding: 0 clamp(1.5rem, 7vw, 6rem); margin-bottom: clamp(2.5rem,5vw,4.5rem); }
.project__head-inner { max-width: 1000px; margin: 0 auto; }
.project__index {
  font-size: .8rem; letter-spacing: .26em; text-transform: uppercase;
  color: var(--accent-dk); margin-bottom: 1.2rem;
}
.project__title {
  font-family: var(--serif); font-weight: 500; line-height: 1;
  font-size: clamp(2.8rem, 9vw, 6.5rem); letter-spacing: -.015em; margin-bottom: 1.6rem;
}
.project__intro { max-width: 720px; font-size: clamp(1rem,1.4vw,1.15rem); color: var(--ink-soft); }
.project__tags {
  list-style: none; display: flex; flex-wrap: wrap; gap: .6rem; margin-top: 2rem;
}
.project__tags li {
  font-size: .72rem; letter-spacing: .12em; text-transform: uppercase;
  padding: .45rem .9rem; border: 1px solid var(--line); border-radius: 100px; color: var(--ink-soft);
}

/* ---------- Gallery ---------- */
.gallery {
  display: grid; gap: clamp(1rem, 2.5vw, 2.2rem);
  padding: 0 clamp(1.5rem, 7vw, 6rem);
  grid-template-columns: 1fr;
  max-width: 1500px; margin: 0 auto;
}
.gallery__item {
  position: relative; overflow: hidden; cursor: pointer;
  background: var(--cream); border-radius: 4px;
  box-shadow: 0 10px 30px -20px rgba(32,35,42,.5);
  opacity: 0; transform: translateY(34px);
  transition: opacity .9s var(--ease), transform .9s var(--ease), box-shadow .5s var(--ease);
}
.gallery__item.is-in { opacity: 1; transform: none; }
.gallery__item:hover { box-shadow: var(--shadow); }
.gallery__item img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 1.1s var(--ease), filter .6s var(--ease);
}
.gallery__item:hover img { transform: scale(1.035); }
/* wide spreads span full width, alternating ones go side-by-side on big screens */
.gallery__item--wide { grid-column: 1 / -1; }
.gallery__item--full { grid-column: 1 / -1; }

.gallery__meta {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 2.5rem 1.6rem 1.3rem;
  background: linear-gradient(to top, rgba(20,24,36,.78), transparent);
  color: #fff; opacity: 0; transform: translateY(12px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}
.gallery__item:hover .gallery__meta,
.gallery__item:focus-visible .gallery__meta { opacity: 1; transform: none; }
.gallery__meta-title { font-family: var(--serif); font-size: 1.4rem; font-weight: 500; }
.gallery__meta-sub { font-size: .74rem; letter-spacing: .14em; text-transform: uppercase; opacity: .85; }
.gallery__zoom {
  position: absolute; top: 1rem; right: 1rem; width: 40px; height: 40px;
  border-radius: 50%; background: rgba(250,248,244,.9); color: var(--ink);
  display: grid; place-items: center; font-size: 1.1rem;
  opacity: 0; transform: scale(.7); transition: all .4s var(--ease);
}
.gallery__item:hover .gallery__zoom { opacity: 1; transform: scale(1); }

@media (min-width: 760px) {
  .gallery { grid-template-columns: 1fr 1fr; }
}

/* ---------- Contact ---------- */
.contact {
  background: var(--ink); color: var(--cream);
  padding: clamp(5rem,12vw,10rem) clamp(1.5rem,7vw,6rem);
  text-align: center;
}
.contact__inner { max-width: 800px; margin: 0 auto; }
.contact__label { font-size: .78rem; letter-spacing: .3em; text-transform: uppercase; color: var(--accent); margin-bottom: 1.6rem; }
.contact__title { font-family: var(--serif); font-weight: 500; font-size: clamp(2.4rem,7vw,5rem); line-height: 1.04; }
.contact__sub { margin-top: 1rem; color: #b7bbc4; letter-spacing: .04em; }
.contact__email {
  display: block; margin-top: 1.8rem; color: var(--cream);
  font-family: var(--serif); font-size: clamp(1.3rem, 3vw, 1.9rem);
  letter-spacing: .02em; text-decoration: none;
  transition: color .4s var(--ease), letter-spacing .4s var(--ease);
}
.contact__email:hover { color: var(--accent); letter-spacing: .06em; }
.contact__cta {
  display: inline-block; margin-top: 1.6rem; color: var(--cream);
  text-decoration: none; font-size: 1.05rem; letter-spacing: .05em;
  padding-bottom: .4rem; border-bottom: 1px solid var(--accent);
  transition: color .4s var(--ease), border-color .4s var(--ease), letter-spacing .4s var(--ease);
}
.contact__cta:hover { color: var(--accent); letter-spacing: .12em; }
.contact__credit { margin-top: 3.5rem; font-size: .78rem; color: #767b85; letter-spacing: .04em; }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .9s var(--ease) var(--d,0s), transform .9s var(--ease) var(--d,0s); }
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal, .gallery__item { opacity: 1 !important; transform: none !important; }
  .hero__cue-line { animation: none; }
}

/* ---------- Lightbox ---------- */
.lightbox {
  position: fixed; inset: 0; z-index: 300;
  background: rgba(16,18,24,.96); backdrop-filter: blur(6px);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transition: opacity .4s var(--ease);
  padding: clamp(1rem, 4vw, 3rem);
}
.lightbox.is-open { opacity: 1; pointer-events: auto; }
.lightbox__fig { max-width: 95vw; max-height: 90vh; text-align: center; }
.lightbox__fig img {
  max-width: 95vw; max-height: 82vh; width: auto; height: auto; margin: 0 auto;
  border-radius: 3px; box-shadow: 0 30px 80px -20px rgba(0,0,0,.7);
  transform: scale(.96); transition: transform .45s var(--ease);
}
.lightbox.is-open .lightbox__fig img { transform: scale(1); }
.lightbox__fig figcaption {
  color: #d8d9dd; margin-top: 1rem; font-size: .82rem; letter-spacing: .12em; text-transform: uppercase;
}
.lightbox__close, .lightbox__nav {
  position: absolute; background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.18);
  color: #fff; cursor: pointer; border-radius: 50%;
  display: grid; place-items: center; transition: background .3s var(--ease), transform .3s var(--ease);
}
.lightbox__close { top: 1.5rem; right: 1.5rem; width: 50px; height: 50px; font-size: 1.8rem; line-height: 1; }
.lightbox__nav { top: 50%; transform: translateY(-50%); width: 56px; height: 56px; font-size: 2rem; }
.lightbox__nav--prev { left: clamp(.75rem,3vw,2.5rem); }
.lightbox__nav--next { right: clamp(.75rem,3vw,2.5rem); }
.lightbox__close:hover, .lightbox__nav:hover { background: rgba(255,255,255,.22); }
.lightbox__nav--prev:hover { transform: translateY(-50%) translateX(-3px); }
.lightbox__nav--next:hover { transform: translateY(-50%) translateX(3px); }

/* ---------- Mobile menu ---------- */
@media (max-width: 720px) {
  .nav__toggle { display: block; }
  .nav__links {
    position: fixed; inset: 0; flex-direction: column; align-items: center; justify-content: center;
    gap: 2.2rem; background: rgba(244,241,236,.98); backdrop-filter: blur(10px);
    transform: translateY(-100%); transition: transform .5s var(--ease); pointer-events: none;
  }
  .nav__links a { color: var(--ink) !important; font-size: 1.1rem; }
  body.menu-open .nav__links { transform: none; pointer-events: auto; }
  body.menu-open .nav__toggle span { background: var(--ink) !important; }
  body.menu-open .nav__toggle span:nth-child(1) { transform: translateY(10px) rotate(45deg); }
  body.menu-open .nav__toggle span:nth-child(2) { opacity: 0; }
  body.menu-open .nav__toggle span:nth-child(3) { transform: translateY(-10px) rotate(-45deg); }
  .lightbox__nav { width: 44px; height: 44px; font-size: 1.5rem; }
}