/*
Theme Name: Dier Liu
Theme URI: https://www.deardier.com
Author: Dier Liu
Description: A minimal photography portfolio theme
Version: 1.0
Text Domain: dierliu
*/

/* ============================================
   RESET & BASE
   ============================================ */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;overflow-x:hidden}
body{
  font-family:'Inter',-apple-system,BlinkMacSystemFont,sans-serif;
  background:#0a0a0a;color:#e8e8e8;overflow-x:hidden;line-height:1.7;
  -webkit-font-smoothing:antialiased
}
img{max-width:100%;height:auto;display:block}
a{text-decoration:none;color:inherit}
button,input,textarea{font-family:inherit;border:none;outline:none;background:none;color:inherit}
ul{list-style:none}
::selection{background:rgba(200,160,100,.3);color:#fff}
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:#0a0a0a}
::-webkit-scrollbar-thumb{background:#333;border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:#555}

/* ---------- UTILITY ---------- */
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:120px 0;position:relative}
.section-header{text-align:center;margin-bottom:64px}
.section-tag{
  display:inline-block;font-size:11px;letter-spacing:4px;text-transform:uppercase;
  color:rgba(200,160,100,.8);margin-bottom:12px;position:relative
}
.section-title{
  font-family:'Playfair Display',Georgia,serif;
  font-size:clamp(32px,5vw,52px);font-weight:400;color:#f0f0f0;
  margin-bottom:24px
}
.section-divider{
  display:flex;justify-content:center;gap:6px;height:2px
}
.section-divider span{
  display:block;width:40px;height:2px;background:linear-gradient(90deg,#c8a664,rgba(200,160,100,.2))
}

/* ---------- PRELOADER ---------- */
#preloader{
  position:fixed;inset:0;z-index:9999;
  background:#0a0a0a;display:flex;flex-direction:column;
  align-items:center;justify-content:center;
  transition:opacity .6s ease,visibility .6s ease
}
#preloader.hidden{opacity:0;visibility:hidden;pointer-events:none}
.loader-ring{
  width:48px;height:48px;border-radius:50%;
  border:2px solid rgba(200,160,100,.1);
  border-top-color:#c8a664;animation:spin 1s linear infinite
}
@keyframes spin{to{transform:rotate(360deg)}}
.loader-text{
  margin-top:24px;font-size:13px;letter-spacing:3px;
  text-transform:uppercase;color:rgba(200,160,100,.6);
  animation:pulse-text 1.5s ease-in-out infinite
}
@keyframes pulse-text{0%,100%{opacity:.4}50%{opacity:1}}

/* ---------- NAVIGATION ---------- */
.navbar{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  padding:16px 0;transition:all .4s cubic-bezier(.4,0,.2,1)
}
.navbar.scrolled{
  background:rgba(10,10,10,.92);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  padding:10px 0;box-shadow:0 1px 0 rgba(255,255,255,.06)
}
.nav-container{display:flex;align-items:center;justify-content:space-between}
.nav-logo{
  font-family:'Playfair Display',serif;font-size:26px;font-weight:700;
  color:#c8a664;letter-spacing:-.5px
}
.nav-menu{display:flex;gap:36px}
.nav-link{
  font-size:13px;letter-spacing:1.5px;text-transform:uppercase;
  color:rgba(255,255,255,.6);transition:color .3s;position:relative;
  padding:4px 0;font-weight:500
}
.nav-link::after{
  content:'';position:absolute;bottom:0;left:0;width:0;height:1px;
  background:#c8a664;transition:width .3s ease
}
.nav-link:hover,.nav-link.active{color:#fff}
.nav-link:hover::after,.nav-link.active::after{width:100%}
.nav-toggle{
  display:none;flex-direction:column;gap:6px;cursor:pointer;
  padding:4px;z-index:1001
}
.nav-toggle span{
  display:block;width:26px;height:2px;background:#e8e8e8;
  transition:all .3s ease;border-radius:1px
}
.nav-toggle.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.nav-toggle.active span:nth-child(2){opacity:0;transform:translateX(-10px)}
.nav-toggle.active span:nth-child(3){transform:rotate(-45deg) translate(6px,-6px)}

/* ---------- HERO ---------- */
.hero{
  position:relative;min-height:100vh;display:flex;align-items:center;
  overflow:hidden;padding:80px 0 80px
}
.hero-bg{
  position:absolute;inset:0;z-index:0;
  background:url('assets/hero-bg.jpg') center/cover no-repeat;
  transform:scale(1.1);transition:transform .1s linear;
  will-change:transform
}
.hero-overlay{
  position:absolute;inset:0;z-index:1;
  background:linear-gradient(135deg,
    rgba(10,10,10,.7) 0%,
    rgba(10,10,10,.4) 40%,
    rgba(10,10,10,.6) 70%,
    rgba(10,10,10,.85) 100%
  )
}
.hero-particles{
  position:absolute;inset:0;z-index:1;overflow:hidden;pointer-events:none
}
.particle{
  position:absolute;width:2px;height:2px;background:rgba(200,160,100,.4);
  border-radius:50%;animation:float-particle linear infinite
}
@keyframes float-particle{
  0%{transform:translateY(100vh) rotate(0deg);opacity:0}
  10%{opacity:1}
  90%{opacity:1}
  100%{transform:translateY(-10vh) rotate(720deg);opacity:0}
}
.hero-content{position:relative;z-index:2;max-width:800px}
.hero-subtitle{
  font-size:13px;letter-spacing:4px;text-transform:uppercase;
  color:#c8a664;margin-bottom:24px;font-weight:500
}
.hero-title{
  font-family:'Playfair Display',Georgia,serif;font-weight:400;
  font-size:clamp(36px,7vw,72px);line-height:1.15;color:#fff;
  margin-bottom:28px
}
.hero-title .line{display:block}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 32px;font-size:14px;font-weight:500;letter-spacing:.5px;
  border-radius:100px;cursor:pointer;transition:all .4s cubic-bezier(.4,0,.2,1);
  position:relative;overflow:hidden
}
.btn-primary{
  background:linear-gradient(135deg,#c8a664,#b8924f);
  color:#0a0a0a;border:1px solid transparent
}
.btn-primary:hover{
  transform:translateY(-2px);box-shadow:0 8px 30px rgba(200,160,100,.3)
}
.btn-outline{
  background:transparent;color:#e8e8e8;
  border:1px solid rgba(255,255,255,.25)
}
.btn-outline:hover{
  border-color:#c8a664;color:#c8a664;transform:translateY(-2px)
}

/* ---------- REVEAL ANIMATIONS ---------- */
.reveal-text{opacity:0;transform:translateY(30px);animation:reveal-up .8s ease forwards}
.reveal-text:nth-child(1){animation-delay:.2s}
.reveal-text:nth-child(2){animation-delay:.45s}
.reveal-text:nth-child(3){animation-delay:.7s}
@keyframes reveal-up{to{opacity:1;transform:translateY(0)}}

.reveal-left{opacity:0;transform:translateX(-60px);transition:all .9s cubic-bezier(.4,0,.2,1)}
.reveal-right{opacity:0;transform:translateX(60px);transition:all .9s cubic-bezier(.4,0,.2,1)}
.reveal-up{opacity:0;transform:translateY(50px);transition:all .8s cubic-bezier(.4,0,.2,1)}
.reveal-left.visible,.reveal-right.visible,.reveal-up.visible{opacity:1;transform:translate(0)}

/* ---------- ABOUT ---------- */
.about{background:linear-gradient(180deg,#0a0a0a 0%,#0f0f0f 100%)}
.about-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:80px;align-items:center}
.about-image{position:relative}
.about-img-wrapper{
  position:relative;border-radius:4px;overflow:hidden;
  box-shadow:0 20px 80px rgba(0,0,0,.5)
}
.about-img-wrapper img{
  width:100%;height:600px;object-fit:cover;transition:transform .8s ease
}
.about-img-wrapper:hover img{transform:scale(1.05)}
.about-img-border{
  position:absolute;inset:12px;border:1px solid rgba(200,160,100,.3);
  border-radius:2px;pointer-events:none
}
.about-text .about-greeting{
  font-family:'Playfair Display',serif;font-size:26px;color:#c8a664;margin-bottom:16px
}
.about-bio{color:rgba(255,255,255,.65);margin-bottom:16px;font-size:17px;line-height:1.9}

/* ---------- GALLERY GRID LAYOUT ---------- */
.gallery{background:#0a0a0a;overflow:hidden}
.gallery-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:12px;
  grid-auto-rows:280px
}
.gallery-item{
  position:relative;
  border-radius:4px;
  overflow:hidden;
  cursor:pointer;
  transition:transform .4s ease,box-shadow .4s ease;
  opacity:0;
  animation:fadeIn .5s ease forwards
}
.gallery-item:nth-child(4n+1),
.gallery-item:nth-child(4n+4){grid-row:span 2}
.gallery-item img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .7s cubic-bezier(.4,0,.2,1)
}
.gallery-item:hover img{transform:scale(1.08)}
.gallery-item:hover{box-shadow:0 8px 30px rgba(0,0,0,.4)}
.gallery-item.hidden{display:none}
@keyframes fadeIn{
  from{opacity:0;transform:scale(.95)}
  to{opacity:1;transform:scale(1)}
}

/* ---------- LIGHTBOX ---------- */
.lightbox{
  position:fixed;inset:0;z-index:2000;background:rgba(0,0,0,.92);
  backdrop-filter:blur(30px);-webkit-backdrop-filter:blur(30px);
  display:flex;align-items:center;justify-content:center;
  opacity:0;visibility:hidden;transition:all .4s ease;padding:40px
}
.lightbox.active{opacity:1;visibility:visible}
.lightbox-close{
  position:absolute;top:24px;right:24px;font-size:36px;color:rgba(255,255,255,.6);
  cursor:pointer;transition:color .3s;z-index:10;width:50px;height:50px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(255,255,255,.06);border-radius:50%;line-height:1;
  border:1px solid rgba(255,255,255,.08)
}
.lightbox-close:hover{color:#fff;background:rgba(255,255,255,.12)}
.lightbox-nav{
  position:absolute;top:50%;transform:translateY(-50%);z-index:10;
  width:50px;height:50px;display:flex;align-items:center;justify-content:center;
  background:rgba(255,255,255,.06);border-radius:50%;cursor:pointer;
  color:rgba(255,255,255,.6);transition:all .3s;border:1px solid rgba(255,255,255,.08);
  backdrop-filter:blur(8px)
}
.lightbox-nav:hover{color:#fff;background:rgba(255,255,255,.12)}
.lightbox-prev{left:24px}
.lightbox-next{right:24px}
.lightbox-content{
  max-width:1000px;max-height:85vh;display:flex;flex-direction:column;
  align-items:center;gap:16px;position:relative
}
.lightbox-content img{
  max-width:100%;max-height:75vh;object-fit:contain;border-radius:4px;
  box-shadow:0 20px 60px rgba(0,0,0,.5);opacity:0;transform:scale(.95);
  transition:all .4s ease
}
.lightbox.active .lightbox-content img{opacity:1;transform:scale(1)}
.lightbox-info{
  display:flex;align-items:center;gap:24px;
  padding:12px 24px;background:rgba(255,255,255,.05);
  border-radius:100px;border:1px solid rgba(255,255,255,.06)
}
.lightbox-info span{
  font-size:12px;letter-spacing:1.5px;text-transform:uppercase;
  color:rgba(255,255,255,.5)
}

/* ---------- FOOTER ---------- */
.footer{
  background:#060606;padding:48px 0;border-top:1px solid rgba(255,255,255,.04)
}
.footer-content{
  display:flex;flex-direction:column;align-items:center;gap:16px;text-align:center
}
.footer-logo{
  font-family:'Playfair Display',serif;font-size:20px;
  color:#c8a664;font-weight:700
}
.footer-content p{font-size:13px;color:rgba(255,255,255,.35)}
.footer-links{
  display:flex;gap:24px
}
.footer-links a{
  font-size:12px;letter-spacing:1px;text-transform:uppercase;
  color:rgba(255,255,255,.35);transition:color .3s
}
.footer-links a:hover{color:#c8a664}
.footer-copy{font-size:12px !important;color:rgba(255,255,255,.2) !important;margin-top:8px}
.footer-back-top{
  display:flex;justify-content:center;margin-top:24px
}
.back-top{
  width:40px;height:40px;border-radius:50%;
  background:rgba(255,255,255,.05);display:flex;align-items:center;
  justify-content:center;transition:all .3s;color:rgba(255,255,255,.4);
  border:1px solid rgba(255,255,255,.06)
}
.back-top:hover{background:#c8a664;color:#0a0a0a;transform:translateY(-4px)}

/* ---------- RESPONSIVE ---------- */
@media(max-width:992px){
  .about-grid{grid-template-columns:1fr;gap:60px}
  .about-image{max-width:500px;margin:0 auto}
  .about-img-wrapper img{height:450px}
  .gallery-grid{grid-template-columns:repeat(2,1fr);grid-auto-rows:220px}
  .gallery-item:nth-child(4n+1),
  .gallery-item:nth-child(4n+4){grid-row:span 1}
}
@media(max-width:768px){
  .nav-menu{
    position:fixed;top:0;right:-100%;width:70%;max-width:320px;
    height:100vh;background:rgba(10,10,10,.97);
    backdrop-filter:blur(30px);-webkit-backdrop-filter:blur(30px);
    flex-direction:column;align-items:center;justify-content:center;
    gap:32px;transition:right .4s cubic-bezier(.4,0,.2,1);
    border-left:1px solid rgba(255,255,255,.06)
  }
  .nav-menu.active{right:0}
  .nav-toggle{display:flex}
  .hero-title{font-size:clamp(30px,10vw,48px)}
  .hero-actions{flex-direction:column;align-items:flex-start}
  .gallery-grid{grid-template-columns:1fr;grid-auto-rows:260px}
  .about-img-wrapper img{height:350px}
  .lightbox{padding:16px}
  .lightbox-nav{width:40px;height:40px}
  .lightbox-prev{left:8px}
  .lightbox-next{right:8px}
}