/* ================================================================
   SVETLANA KISSELEV — WEARABLE STRUCTURAL ART
   Shared stylesheet — used by every page.

   HOW TO EDIT:
   - All colors, fonts and durations are defined once, below, as
     CSS variables. Change a value here and it updates everywhere.
   - Component styles are grouped and commented by section.
   ================================================================ */

/* ----------------------------------------------------------------
   1. DESIGN TOKENS
   ---------------------------------------------------------------- */
:root{
  /* Backgrounds */
  --color-bg-main: #1C1B19;        /* warm anthracite — every page except the threshold */
  --color-bg-threshold: #232323;   /* placeholder — replace with the exact hex sampled from the photo's dark edge */

  /* Accent */
  --color-gold: #C9A66B;           /* titles, threshold phrase, hairlines, accents only */
  --color-gold-soft: rgba(201, 166, 107, 0.35); /* hairline rules / dividers */

  /* Text */
  --color-text: #F2EFE9;                       /* off-white, running text */
  --color-text-muted: rgba(242, 239, 233, 0.62); /* secondary text, captions */

  /* Typography */
  --font-display: "Cormorant Garamond", Georgia, "Times New Roman", serif; /* titles, threshold phrase — fine serif */
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; /* running text, navigation */

  /* Motion — slow fades only, nothing fast or abrupt */
  --duration-fade-fast: 400ms;   /* threshold cinema transition */
  --duration-fade-hold: 180ms;   /* black hold, threshold transition */
  --duration-fade-slow: 900ms;   /* scroll reveals, hovers */

  /* Layout */
  --max-width: 1100px;
  --gutter: clamp(1.5rem, 5vw, 4rem);
}

/* ----------------------------------------------------------------
   2. RESET
   ---------------------------------------------------------------- */
*, *::before, *::after{ box-sizing: border-box; }

html, body{
  margin: 0;
  height: 100%;
}

body{
  background: var(--color-bg-main);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body.locked{ overflow: hidden; } /* used only during the threshold transition */

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

a{ color: inherit; text-decoration: none; }

button{ font-family: inherit; }

h1, h2, h3{
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: 0.02em;
  margin: 0 0 0.5em;
  color: var(--color-text);
}

.eyebrow{
  font-family: var(--font-body);
  font-size: 0.72rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--color-gold);
}

.rule{
  border: none;
  border-top: 1px solid var(--color-gold-soft);
  margin: 2rem 0;
}

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

/* Respect reduced motion everywhere */
@media (prefers-reduced-motion: reduce){
  *{ transition-duration: 1ms !important; animation-duration: 1ms !important; }
}

/* ----------------------------------------------------------------
   3. SITE HEADER / NAVIGATION
   (used on Collection / About / Contact, and inside the Home screen)
   ---------------------------------------------------------------- */
.site-header{
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem 2.5rem; /* guarantees breathing room between wordmark and nav at any width */
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem var(--gutter) 1.5rem;
}

.wordmark{
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: 0.08em;
  color: var(--color-text);
  transition: color var(--duration-fade-slow) ease;
}

.wordmark:hover,
.wordmark:focus-visible{ color: var(--color-gold); }

.site-nav{
  display: flex;
  gap: 2.2rem;
}

.site-nav a{
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  position: relative;
  padding-bottom: 0.3rem;
  transition: color var(--duration-fade-slow) ease;
}

.site-nav a::after{
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background: var(--color-gold);
  transition: width var(--duration-fade-slow) ease;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.site-nav a.active{
  color: var(--color-text);
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after,
.site-nav a.active::after{
  width: 100%;
}

.nav-toggle{
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle span{
  width: 22px;
  height: 1px;
  background: var(--color-text);
}

@media (max-width: 720px){
  .nav-toggle{ display: flex; }

  .site-nav{
    position: absolute;
    top: 100%;
    right: var(--gutter);
    flex-direction: column;
    gap: 1.2rem;
    background: var(--color-bg-main);
    border: 1px solid var(--color-gold-soft);
    padding: 1.5rem 2rem;
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity var(--duration-fade-fast) ease, transform var(--duration-fade-fast) ease;
  }

  .site-header{ position: relative; }

  .site-nav.is-open{
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }
}

/* ----------------------------------------------------------------
   4. THRESHOLD PAGE  (index.html only)
   ---------------------------------------------------------------- */
.threshold{
  position: fixed;
  inset: 0;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 5vh 5vw;
  background: var(--color-bg-threshold);
  transition: opacity var(--duration-fade-fast) ease;
}

.threshold.fade-out{
  opacity: 0;
  pointer-events: none;
}

.threshold__photo{
  max-width: 80vw;
  max-height: 62vh;
  object-fit: contain;
}

.threshold__tagline{
  margin: 2.2rem 0 0;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 300;
  font-size: clamp(1.05rem, 1.8vw, 1.4rem);
  letter-spacing: 0.05em;
  color: var(--color-gold);
  text-align: center;
}

.threshold__enter{
  margin-top: 2.6rem;
  background: none;
  border: none;
  font-family: var(--font-body);
  font-size: 0.75rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--color-text);
  opacity: 0.6;
  cursor: pointer;
  padding: 0.6rem 1rem;
  position: relative;
  transition: opacity var(--duration-fade-slow) ease;
}

.threshold__enter::after{
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 0;
  height: 1px;
  background: var(--color-gold);
  transform: translateX(-50%);
  transition: width var(--duration-fade-slow) ease;
}

.threshold__enter:hover,
.threshold__enter:focus-visible{ opacity: 1; outline: none; }

.threshold__enter:hover::after,
.threshold__enter:focus-visible::after{ width: 55%; }

.black-overlay{
  position: fixed;
  inset: 0;
  z-index: 20;
  background: #000;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-fade-fast) ease;
}

.black-overlay.visible{ opacity: 1; }

/* ----------------------------------------------------------------
   5. HOME SCREEN  (revealed inside index.html after the threshold)
   ---------------------------------------------------------------- */
.home{
  position: relative;
  z-index: 5;
  display: none; /* switched to flex by script.js at the right moment */
  flex-direction: column;
  min-height: 100vh;
  background: var(--color-bg-main);
  opacity: 0;
  transition: opacity var(--duration-fade-fast) ease;
}

.home.visible{ opacity: 1; }

.home__hero{
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem var(--gutter);
}

.home__hero h1{
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  letter-spacing: 0.04em;
}

.home__hero p{
  max-width: 32em;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  letter-spacing: 0.03em;
}

/* ----------------------------------------------------------------
   6. PAGE HERO  (Collection / About / Contact intro block)
   ---------------------------------------------------------------- */
.page-hero{
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem var(--gutter) 3rem;
}

.page-hero h1{ font-size: clamp(1.8rem, 4vw, 2.6rem); }

.page-hero p{
  max-width: 42em;
  color: var(--color-text-muted);
}

/* ----------------------------------------------------------------
   7. COLLECTION — series + pieces (exhibition-catalogue layout)
   ---------------------------------------------------------------- */
.series{
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem var(--gutter) 4rem;
}

.series__intro{
  max-width: 42em;
  margin-bottom: 3rem;
}

.series__intro h2{ font-size: clamp(1.5rem, 3vw, 2rem); }

.series__intro p{ color: var(--color-text-muted); }

/* Each piece: large image, then a placard-style label — never a tight e-commerce grid */
.piece{
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: clamp(1.5rem, 4vw, 4rem);
  align-items: center;
  padding: 3.5rem 0;
  border-top: 1px solid var(--color-gold-soft);

  /* scroll-reveal, activated by script.js adding .is-visible */
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--duration-fade-slow) ease, transform var(--duration-fade-slow) ease;
}

.piece.is-visible{
  opacity: 1;
  transform: translateY(0);
}

.piece:nth-child(even){ direction: rtl; } /* alternate image side for rhythm */
.piece:nth-child(even) > *{ direction: ltr; }

.piece__image{
  aspect-ratio: 4 / 5;
  object-fit: cover;
  background: #131211; /* placeholder tone while real photos are added */
}

.piece__label .eyebrow{ display: block; margin-bottom: 0.6rem; }

.piece__label h3{ font-size: clamp(1.3rem, 2.4vw, 1.7rem); }

.piece__label p{ color: var(--color-text-muted); font-size: 0.95rem; }

/* ----------------------------------------------------------------
   8. WAITLIST MODULE  (repeated at the foot of Collection & Contact —
      deliberately NOT part of the main navigation)
   ---------------------------------------------------------------- */
.waitlist{
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3rem var(--gutter) 5rem;
  text-align: center;
  border-top: 1px solid var(--color-gold-soft);
}

.waitlist h2{ font-size: 1.1rem; letter-spacing: 0.04em; }

.waitlist p{
  color: var(--color-text-muted);
  font-size: 0.9rem;
  max-width: 30em;
  margin: 0 auto 1.5rem;
}

.waitlist form{
  display: flex;
  justify-content: center;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.waitlist input[type="email"]{
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--color-gold-soft);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 0.9rem;
  padding: 0.6rem 0.2rem;
  width: 260px;
  max-width: 70vw;
  transition: border-color var(--duration-fade-slow) ease;
}

.waitlist input[type="email"]:focus{
  outline: none;
  border-color: var(--color-gold);
}

.waitlist button,
.contact-form button{
  background: none;
  border: 1px solid var(--color-gold-soft);
  color: var(--color-text);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 0.7rem 1.6rem;
  cursor: pointer;
  transition: border-color var(--duration-fade-slow) ease, color var(--duration-fade-slow) ease;
}

.waitlist button:hover,
.waitlist button:focus-visible,
.contact-form button:hover,
.contact-form button:focus-visible{
  border-color: var(--color-gold);
  color: var(--color-gold);
  outline: none;
}

.form-note{
  margin-top: 1rem;
  font-size: 0.82rem;
  color: var(--color-gold);
  opacity: 0;
  transition: opacity var(--duration-fade-slow) ease;
}

.form-note.visible{ opacity: 1; }

/* ----------------------------------------------------------------
   9. ABOUT PAGE
   ---------------------------------------------------------------- */
.about{
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem var(--gutter) 4rem;
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: start;
}

.about__portrait img{
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  background: #131211;
}

.about__portrait figcaption{
  margin-top: 0.8rem;
  font-size: 0.82rem;
  color: var(--color-text-muted);
  font-style: italic;
}

.about__text p{ color: var(--color-text-muted); }

.about__certificate{
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-gold-soft);
}

.about__certificate h2{ font-size: 1.1rem; }

@media (max-width: 820px){
  .about, .piece{ grid-template-columns: 1fr; }
  .piece:nth-child(even){ direction: ltr; }
}

/* ----------------------------------------------------------------
   10. CONTACT PAGE
   ---------------------------------------------------------------- */
.contact{
  max-width: 640px;
  margin: 0 auto;
  padding: 1rem var(--gutter) 3rem;
}

.contact-form{
  display: flex;
  flex-direction: column;
  gap: 1.4rem;
  margin-top: 2rem;
}

.contact-form label{
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.contact-form input,
.contact-form textarea{
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--color-gold-soft);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 0.6rem 0.1rem;
  resize: vertical;
  transition: border-color var(--duration-fade-slow) ease;
}

.contact-form input:focus,
.contact-form textarea:focus{
  outline: none;
  border-color: var(--color-gold);
}

.contact-form button{ align-self: flex-start; margin-top: 0.5rem; }

.contact-details{
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-gold-soft);
  color: var(--color-text-muted);
  font-size: 0.92rem;
  line-height: 1.9;
}

.contact-details strong{ color: var(--color-text); font-weight: 500; }

/* ----------------------------------------------------------------
   11. FOOTER
   ---------------------------------------------------------------- */
.site-footer{
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem var(--gutter) 3rem;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  text-align: center;
}