/* ============================================
   VAN DYCK — Global Styles
   Dark · Premium · Fluid Animations
   ============================================ */

:root {
  --bg: #0a0a0a;
  --bg-alt: #111111;
  --bg-card: #161616;
  --text: #f0f0f0;
  --text-muted: #999999;
  --text-dim: #666666;
  --gold: #c8a96e;
  --gold-hover: #d4b87a;
  --gold-dim: rgba(200, 169, 110, 0.12);
  --gold-glow: rgba(200, 169, 110, 0.2);
  --border: rgba(255,255,255,0.06);
  --border-light: rgba(255,255,255,0.1);
  --radius: 4px;
  --nav-h: 72px;

  --ease-out-expo: cubic-bezier(0.19, 1, 0.22, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
}

/* Reset */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:'Inter','Noto Sans SC',-apple-system,BlinkMacSystemFont,sans-serif;
  background:var(--bg);color:var(--text);
  -webkit-font-smoothing:antialiased;overflow-x:hidden
}
::selection{background:var(--gold);color:#000}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul{list-style:none}

.container{max-width:1400px;margin:0 auto;padding:0 40px}

/* ========== NAVBAR ========== */
.navbar{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  height:var(--nav-h);
  background:rgba(10,10,10,0.8);
  backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);
  border-bottom:1px solid transparent;
  transition:border-color 0.4s ease,background 0.4s ease
}
.navbar.scrolled{border-color:var(--border);background:rgba(10,10,10,0.95)}
.nav-inner{
  max-width:1400px;margin:0 auto;padding:0 40px;
  height:100%;display:flex;align-items:center;justify-content:space-between
}
.nav-logo{display:flex;flex-direction:column;line-height:1.1}
.logo-en{
  font-family:'Cormorant Garamond',serif;
  font-size:1.25rem;font-weight:600;letter-spacing:5px
}
.logo-cn{font-size:0.6rem;font-weight:300;letter-spacing:3px;color:var(--text-muted)}
.nav-links{display:flex;gap:32px}
.nav-links a{
  font-size:0.78rem;font-weight:400;letter-spacing:3px;text-transform:uppercase;
  color:var(--text-muted);position:relative;padding:4px 0;
  transition:color 0.3s ease;
}
.nav-links a::after{
  content:'';position:absolute;bottom:-2px;left:0;
  width:0;height:1px;background:var(--gold);
  transition:width 0.4s var(--ease-out-expo)
}
.nav-links a:hover,.nav-links a.active{color:var(--text)}
.nav-links a:hover::after,.nav-links a.active::after{width:100%}

/* Page transition wrapper */
.page-wrap{opacity:0;animation:pageIn 0.6s var(--ease-out-expo) forwards}
@keyframes pageIn{
  0%{opacity:0;transform:translateY(12px)}
  100%{opacity:1;transform:translateY(0)}
}

/* ========== SCROLL REVEAL ========== */
.reveal{opacity:0;transform:translateY(40px);transition:all 0.8s var(--ease-out-expo)}
.reveal.visible{opacity:1;transform:translateY(0)}
.reveal-d1{transition-delay:0.1s}
.reveal-d2{transition-delay:0.2s}
.reveal-d3{transition-delay:0.3s}
.reveal-d4{transition-delay:0.4s}

/* ========== SECTION HEADER ========== */
.section-header{text-align:center;padding:120px 0 60px}
.section-tag{
  display:inline-block;font-size:0.7rem;font-weight:500;letter-spacing:4px;
  text-transform:uppercase;color:var(--gold);margin-bottom:12px
}
.section-title{
  font-family:'Cormorant Garamond',serif;
  font-size:3rem;font-weight:400;letter-spacing:4px;margin-bottom:12px
}
.section-desc{font-size:0.9rem;color:var(--text-muted);max-width:500px;margin:0 auto}

/* ========== PAGE HERO ========== */
.page-hero{
  height:50vh;min-height:360px;
  display:flex;align-items:center;justify-content:center;text-align:center;
  position:relative;overflow:hidden
}
.page-hero-bg{
  position:absolute;inset:0;
  background:linear-gradient(135deg,#0a0a0a 0%,#1a1a1a 50%,#0a0a0a 100%);
  z-index:0
}
.page-hero-content{position:relative;z-index:1;padding-top:var(--nav-h)}
.page-hero .section-title{font-size:3.5rem}
.page-hero .section-desc{font-size:1rem}

/* ========== FOOTER ========== */
.footer{
  border-top:1px solid var(--border);padding:40px 0 24px;margin-top:120px
}
.footer-inner{
  max-width:1400px;margin:0 auto;padding:0 40px;
  display:flex;justify-content:space-between;align-items:center
}
.footer-copyright{font-size:0.75rem;color:var(--text-dim);letter-spacing:1px}
.footer-socials{display:flex;gap:16px}
.footer-socials a{
  width:36px;height:36px;border-radius:50%;
  border:1px solid var(--border);display:flex;align-items:center;justify-content:center;
  color:var(--text-muted);font-size:0.85rem;
  transition:all 0.3s ease
}
.footer-socials a:hover{background:var(--gold);color:#000;border-color:var(--gold)}

/* ========== HAMBURGER ========== */
.hamburger{
  display:none;flex-direction:column;gap:5px;
  background:none;border:none;cursor:pointer;padding:4px
}
.hamburger span{
  display:block;width:22px;height:1.5px;
  background:var(--text);border-radius:1px;
  transition:all 0.3s ease
}
.hamburger.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.hamburger.active span:nth-child(2){opacity:0}
.hamburger.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}

/* ========== MOBILE NAV ========== */
@media(max-width:768px){
  .nav-links{
    position:fixed;top:0;right:-280px;width:280px;height:100vh;
    background:var(--bg-alt);flex-direction:column;padding:100px 32px 32px;
    gap:24px;transition:right 0.4s var(--ease-out-expo);
    z-index:999;border-left:1px solid var(--border)
  }
  .nav-links.active{right:0}
  .nav-links a{font-size:0.9rem}
  .hamburger{display:flex;z-index:1000}
  .container{padding:0 24px}
  .section-title{font-size:2rem}
  .page-hero .section-title{font-size:2.2rem}
  .footer-inner{flex-direction:column;gap:16px;text-align:center}
}

/* ========== ABOUT PAGE ========== */
.about-story{
  display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center;
  padding:40px 0 80px
}
.about-text h2{
  font-family:'Cormorant Garamond',serif;
  font-size:2rem;font-weight:400;letter-spacing:3px;margin-bottom:24px
}
.about-text p{font-size:0.9rem;color:var(--text-muted);line-height:1.8;margin-bottom:16px}
.about-image-wrap{
  position:relative;border-radius:var(--radius);overflow:hidden
}
.about-image-placeholder{
  aspect-ratio:4/5;background:var(--gold-dim);
  display:flex;align-items:center;justify-content:center;
  font-size:3rem;color:var(--gold);opacity:0.4
}

/* Cards row */
.cards-row{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;padding-bottom:80px
}
.mission-card{
  padding:40px 32px;border-radius:var(--radius);
  background:var(--bg-card);border:1px solid var(--border);
  transition:all 0.4s var(--ease-out-expo)
}
.mission-card:hover{
  border-color:var(--gold-dim);transform:translateY(-4px)
}
.mission-card i{font-size:1.5rem;color:var(--gold);margin-bottom:20px}
.mission-card h3{font-size:0.95rem;font-weight:500;margin-bottom:12px}
.mission-card p{font-size:0.8rem;color:var(--text-muted);line-height:1.7}

/* ========== WORKS PAGE ========== */
.works-filters{
  display:flex;justify-content:center;gap:4px;margin-bottom:40px;flex-wrap:wrap
}
.works-filters button{
  padding:10px 22px;border-radius:50px;
  background:transparent;border:1px solid var(--border);color:var(--text-muted);
  font-size:0.78rem;font-weight:400;letter-spacing:2px;cursor:pointer;
  font-family:inherit;transition:all 0.3s ease
}
.works-filters button:hover{border-color:var(--gold-dim);color:var(--gold)}
.works-filters button.active{background:var(--gold);color:#000;border-color:var(--gold)}

.works-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:20px
}
.work-card{
  position:relative;overflow:hidden;border-radius:var(--radius);cursor:pointer;
  background:var(--bg-card);border:1px solid var(--border);
  transition:all 0.4s var(--ease-out-expo);
  animation:fadeUp 0.6s var(--ease-out-expo) forwards;opacity:0
}
.work-card.hidden{display:none}
.work-card:hover{transform:translateY(-4px);border-color:var(--gold-dim)}
.work-card-image{
  aspect-ratio:3/4;background:var(--gold-dim);
  display:flex;align-items:center;justify-content:center;
  font-size:2rem;color:var(--gold);opacity:0.3;
  overflow:hidden
}
.work-card-image img{width:100%;height:100%;object-fit:cover;transition:transform 0.6s ease}
.work-card:hover .work-card-image img{transform:scale(1.06)}
.work-card-body{padding:16px 20px}
.work-card-body h3{font-size:0.9rem;font-weight:500;margin-bottom:4px}
.work-card-body p{font-size:0.75rem;color:var(--text-muted)}

/* Works lightbox */
.works-lightbox{
  position:fixed;inset:0;z-index:2000;
  display:none;align-items:center;justify-content:center;padding:40px
}
.works-lightbox.active{display:flex}
.works-lightbox-overlay{
  position:absolute;inset:0;background:rgba(0,0,0,0.92);backdrop-filter:blur(8px)
}
.works-lightbox-content{
  position:relative;z-index:1;max-width:900px;width:100%;
  animation:scaleIn 0.3s var(--ease-out-expo)
}
@keyframes scaleIn{from{transform:scale(0.92);opacity:0}to{transform:scale(1);opacity:1}}
.works-lightbox-img{
  aspect-ratio:3/4;background:var(--bg-card);border-radius:var(--radius);
  display:flex;align-items:center;justify-content:center;
  font-size:3rem;color:var(--gold);opacity:0.3;overflow:hidden
}
.works-lightbox-img img{width:100%;height:100%;object-fit:contain}
.works-lightbox-close{
  position:absolute;top:-44px;right:0;
  width:36px;height:36px;border-radius:50%;
  background:rgba(255,255,255,0.05);border:1px solid var(--border-light);
  color:var(--text);cursor:pointer;font-size:0.9rem;
  transition:all 0.3s ease
}
.works-lightbox-close:hover{background:var(--gold);color:#000}
.works-lightbox-nav{
  position:absolute;top:50%;transform:translateY(-50%);z-index:2;
  width:40px;height:40px;border-radius:50%;
  background:rgba(255,255,255,0.05);border:1px solid var(--border-light);
  color:var(--text);cursor:pointer;font-size:0.9rem;
  transition:all 0.3s ease;display:flex;align-items:center;justify-content:center
}
.works-lightbox-nav:hover{background:var(--gold);color:#000}
.works-lightbox-prev{left:-50px}
.works-lightbox-next{right:-50px}

@keyframes fadeUp{
  from{opacity:0;transform:translateY(20px)}
  to{opacity:1;transform:translateY(0)}
}

/* ========== CONTACT PAGE ========== */
.contact-grid{
  display:grid;grid-template-columns:1fr 1.2fr;gap:60px;padding:20px 0 80px
}
.contact-info{display:flex;flex-direction:column;gap:16px}
.contact-card{
  padding:24px;border-radius:var(--radius);
  background:var(--bg-card);border:1px solid var(--border);
  transition:all 0.3s ease
}
.contact-card:hover{border-color:var(--gold-dim)}
.contact-card i{font-size:1.1rem;color:var(--gold);margin-bottom:10px}
.contact-card h4{font-size:0.8rem;font-weight:500;margin-bottom:4px}
.contact-card p{font-size:0.8rem;color:var(--text-muted)}
.contact-form{display:flex;flex-direction:column;gap:16px}
.contact-form input,.contact-form textarea{
  width:100%;padding:14px 16px;border-radius:var(--radius);
  background:var(--bg-card);border:1px solid var(--border);
  color:var(--text);font-family:inherit;font-size:0.85rem;
  outline:none;transition:all 0.3s ease
}
.contact-form input:focus,.contact-form textarea:focus{
  border-color:var(--gold-dim);box-shadow:0 0 0 2px var(--gold-dim)
}
.contact-form input::placeholder,.contact-form textarea::placeholder{color:var(--text-dim)}
.contact-form button{
  align-self:flex-start;padding:14px 36px;
  border-radius:50px;border:none;
  background:var(--gold);color:#000;
  font-size:0.85rem;font-weight:500;cursor:pointer;
  font-family:inherit;letter-spacing:2px;
  transition:all 0.3s ease;display:flex;align-items:center;gap:8px
}
.contact-form button:hover{background:var(--gold-hover);gap:12px}

/* ========== RESPONSIVE ========== */
@media(max-width:1024px){
  .about-story{grid-template-columns:1fr;gap:40px}
  .works-grid{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:1fr}
}
@media(max-width:480px){
  .nav-inner{padding:0 20px}
  .logo-en{font-size:1rem;letter-spacing:3px}
  .cards-row{grid-template-columns:1fr}
  .works-grid{grid-template-columns:1fr}
  .section-title{font-size:1.6rem}
  .works-lightbox-prev{left:-30px}
  .works-lightbox-next{right:-30px}
}