/* ══════════════════════════════════════════════
   D STUDIO — Luxury Leather Portfolio
   Interaction layer (hover/active), keyframes, gallery,
   lightbox, responsive. Base looks are inline per element
   (from the high-fidelity handoff), matched to design tokens.
   ══════════════════════════════════════════════ */
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:#1E1B18 url('../textures/wood.png');-webkit-font-smoothing:antialiased;color:#D9BD94}
img{max-width:100%;display:block}
a{text-decoration:none}
input::placeholder,textarea::placeholder{color:rgba(90,58,38,.55);font-style:italic}

@keyframes dust{0%{transform:translate(0,0);opacity:0}15%{opacity:.5}85%{opacity:.35}100%{transform:translate(40px,-120px);opacity:0}}
@keyframes sheen{0%{transform:translateX(-140%) skewX(-18deg)}100%{transform:translateX(340%) skewX(-18deg)}}
@keyframes lockpulse{0%,100%{opacity:.5}50%{opacity:1}}
@keyframes lockjiggle{0%,100%{transform:rotate(0)}25%{transform:rotate(-3deg)}75%{transform:rotate(3deg)}}

/* ── Antique cover lock (tap to unlock) ── */
.unlock{margin:40px auto 0;display:block;background:none;border:none;cursor:pointer;padding:8px}
.lock-shackle{width:44px;height:34px;margin:0 auto -6px;box-sizing:border-box;border:8px solid #b0863a;border-bottom:none;border-radius:22px 22px 0 0;background:transparent;box-shadow:inset 0 1px 0 rgba(255,244,210,.45), 0 2px 4px rgba(0,0,0,.45);transform-origin:88% 90%;transition:transform .5s cubic-bezier(.6,.05,.3,1);position:relative;z-index:1}
.lock-body{position:relative;z-index:2;width:82px;height:66px;margin:0 auto;border-radius:12px;background:url('../textures/brass.png') #A88442;border:1px solid #6f5524;box-shadow:inset 0 2px 2px rgba(255,244,210,.55), inset 0 -4px 6px rgba(70,48,12,.55), 0 6px 16px rgba(20,10,5,.55);display:grid;place-items:center;transition:transform .2s}
.lock-body::before{content:'';position:absolute;inset:6px;border-radius:8px;border:1px solid rgba(255,244,210,.18);pointer-events:none}
.keyhole{position:relative;width:15px;height:15px;border-radius:50%;background:#241407;box-shadow:inset 0 2px 3px rgba(0,0,0,.8), 0 1px 0 rgba(255,244,210,.4)}
.keyhole::after{content:'';position:absolute;top:10px;left:50%;transform:translateX(-50%);width:8px;height:15px;background:#241407;clip-path:polygon(22% 0,78% 0,100% 100%,0 100%)}
.unlock:hover .lock-body{transform:translateY(-2px)}
.unlock:hover{filter:drop-shadow(0 0 12px rgba(201,166,107,.55))}
.unlock:hover .lock-shackle{animation:lockjiggle .5s ease}
.unlock:active .lock-body{transform:translateY(1px);box-shadow:inset 0 4px 8px rgba(70,48,12,.7)}
.lock-note{margin-top:16px;font-family:Jost,sans-serif;font-weight:600;font-size:10px;letter-spacing:.3em;text-indent:.3em;color:#C9A66B;text-shadow:0 1px 2px rgba(0,0,0,.6);animation:lockpulse 2.2s ease-in-out infinite}
#cover.unlocked .lock-shackle{transform:rotate(42deg)}
#cover.unlocked .lock-note{opacity:0;transition:opacity .3s}

/* ── Nav brass nameplates ── */
.nav-lnk{padding:8px 15px;background:url('../textures/brass.png') #A88442;border:1px solid #6f5524;border-radius:6px;
  box-shadow:inset 0 2px 2px rgba(255,244,210,.5), inset 0 -3px 4px rgba(70,48,12,.5), 0 3px 6px rgba(20,10,5,.45);
  font-family:Jost,sans-serif;font-weight:600;font-size:10.5px;letter-spacing:.2em;text-indent:.2em;color:#4B3413;text-shadow:0 1px 0 rgba(255,242,205,.6)}

/* ── Brass elements: hover lift, active press ── */
.brass{transition:transform .22s, box-shadow .22s}
.brass:hover{transform:translateY(-2px);box-shadow:inset 0 2px 2px rgba(255,244,210,.5), inset 0 -3px 4px rgba(70,48,12,.5), 0 8px 14px rgba(20,10,5,.55)}
.brass:active{transform:translateY(1px);box-shadow:inset 0 3px 6px rgba(70,48,12,.65), 0 1px 2px rgba(20,10,5,.4)}

.btn-brass{transition:transform .22s, box-shadow .22s}
.btn-brass:hover{transform:translateY(-2px);box-shadow:inset 0 2px 3px rgba(255,244,210,.55), inset 0 -4px 6px rgba(70,48,12,.55), 0 10px 20px rgba(20,10,5,.6)}
.btn-brass:active{transform:translateY(2px);box-shadow:inset 0 4px 8px rgba(70,48,12,.7), 0 1px 2px rgba(20,10,5,.4)}

.btn-walnut{transition:transform .22s, box-shadow .22s}
.btn-walnut:hover{transform:translateY(-2px)}
.btn-walnut:active{transform:translateY(2px);box-shadow:inset 0 4px 10px rgba(0,0,0,.5)}

.arrow-btn{transition:transform .2s, box-shadow .2s}
.arrow-btn:hover{transform:translateY(-2px)}
.arrow-btn:active{transform:translateY(2px);box-shadow:inset 0 4px 8px rgba(70,48,12,.7)}

.stamp-btn{transition:transform .15s, box-shadow .15s}
.stamp-btn:hover{transform:translateY(-2px)}
.stamp-btn:active{transform:translateY(3px) scale(.98);box-shadow:inset 0 5px 10px rgba(70,48,12,.7), 0 2px 4px rgba(0,0,0,.4)}

.wa-tag{transition:transform .25s, box-shadow .25s}
.wa-tag:hover{transform:rotate(-1deg) translateY(-3px)}
.wa-tag:active{transform:rotate(-1deg) translateY(1px)}

/* ── Folders: hover lift ── */
.folder{transition:transform .35s, box-shadow .35s}
.folder:hover{transform:translateY(-4px);box-shadow:inset 0 1px 0 rgba(255,240,210,.3), inset 0 0 46px rgba(90,58,38,.28), 0 20px 38px rgba(20,10,5,.55)}
.folder-body{overflow:hidden;max-height:0;transition:max-height .8s cubic-bezier(.6,.05,.3,1)}
.folder.open .folder-body{max-height:1000px}
.folder .tab{transition:transform .35s}
.folder.open .tab{transform:translateY(-7px)}

/* ── Gallery (leather lookbook, dynamic) ── */
.g-filterbar{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-bottom:30px}
.g-tab{padding:8px 18px;background:url('../textures/brass.png') #A88442;border:1px solid #6f5524;border-radius:6px;
  box-shadow:inset 0 2px 2px rgba(255,244,210,.5), inset 0 -3px 4px rgba(70,48,12,.5), 0 3px 6px rgba(20,10,5,.45);
  font-family:Jost,sans-serif;font-weight:600;font-size:10.5px;letter-spacing:.18em;color:#4B3413;text-shadow:0 1px 0 rgba(255,242,205,.6);
  cursor:pointer;transition:transform .2s, box-shadow .2s}
.g-tab:hover{transform:translateY(-2px)}
.g-tab.active{box-shadow:inset 0 3px 6px rgba(70,48,12,.65), 0 1px 2px rgba(20,10,5,.4);transform:translateY(1px)}
.g-grid{columns:3 260px;column-gap:20px}
.g-item{break-inside:avoid;margin-bottom:20px;position:relative;background:#FDF7EA;padding:10px 10px 30px;
  box-shadow:0 12px 26px rgba(20,10,5,.5);cursor:pointer;transition:transform .3s, box-shadow .3s}
.g-item:nth-child(3n){transform:rotate(-1.4deg)}
.g-item:nth-child(3n+1){transform:rotate(1deg)}
.g-item:hover{transform:rotate(0) translateY(-4px);box-shadow:0 20px 40px rgba(20,10,5,.6);z-index:2}
.g-item img,.g-item video{width:100%;display:block;filter:sepia(.12) contrast(.98)}
.g-item .cap{margin-top:8px;text-align:center;font-family:Caveat,cursive;font-size:18px;color:#5A3A26}
.g-corner{position:absolute;width:26px;height:26px;background:url('../textures/brass.png') #A88442;filter:drop-shadow(0 2px 2px rgba(20,10,5,.5))}
.g-corner.tl{top:2px;left:2px;clip-path:polygon(0 0,100% 0,0 100%)}
.g-corner.tr{top:2px;right:2px;clip-path:polygon(0 0,100% 0,100% 100%)}
.g-corner.bl{bottom:22px;left:2px;clip-path:polygon(0 0,0 100%,100% 100%)}
.g-corner.br{bottom:22px;right:2px;clip-path:polygon(100% 0,100% 100%,0 100%)}
.g-play{position:absolute;left:50%;top:calc(50% - 10px);transform:translate(-50%,-50%);width:54px;height:54px;border-radius:50%;
  background:url('../textures/brass.png') #A88442;border:1px solid #6f5524;display:grid;place-items:center;font-size:18px;color:#4B3413;
  box-shadow:inset 0 2px 2px rgba(255,244,210,.55), 0 4px 10px rgba(20,10,5,.5);pointer-events:none}
.g-empty{text-align:center;color:#6b4a26;font-family:Caveat,cursive;font-size:22px;padding:40px}

/* ── Lightbox ── */
.lightbox{position:fixed;inset:0;z-index:300;background:rgba(20,10,5,.9);display:none;align-items:center;justify-content:center;padding:30px}
.lightbox.open{display:flex}
.lightbox .inner{background:url('../textures/paper.png') #F5E8D2;padding:16px 16px 40px;border-radius:4px;box-shadow:0 30px 70px rgba(0,0,0,.6);position:relative;max-width:92vw;max-height:90vh}
.lightbox img,.lightbox video,.lightbox iframe{max-width:86vw;max-height:78vh;display:block;border:0}
.lightbox .lb-close{position:absolute;top:-16px;right:-16px;width:44px;height:44px;border-radius:50%;background:url('../textures/brass.png') #A88442;border:1px solid #6f5524;color:#4B3413;font-size:20px;cursor:pointer;box-shadow:inset 0 2px 2px rgba(255,244,210,.55), 0 4px 10px rgba(20,10,5,.5)}
.lb-nav{position:fixed;top:50%;transform:translateY(-50%);width:56px;height:56px;border-radius:50%;background:url('../textures/brass.png') #A88442;border:1px solid #6f5524;color:#4B3413;font-size:22px;cursor:pointer;z-index:2;box-shadow:inset 0 2px 2px rgba(255,244,210,.55), inset 0 -3px 4px rgba(70,48,12,.5), 0 4px 12px rgba(20,10,5,.6)}
.lb-prev{left:24px}.lb-next{right:24px}
@media (max-width:640px){.lb-prev{left:8px}.lb-next{right:8px}.lb-nav{width:46px;height:46px}}

/* ── Responsive ── */
@media (max-width:900px){ .g-grid{columns:2 200px} }
@media (max-width:640px){
  section{padding-left:24px !important;padding-right:24px !important}
  .pad-wood{padding-left:24px !important;padding-right:24px !important}
  .g-grid{columns:1}
}
@media (prefers-reduced-motion: reduce){
  *{animation:none !important}
  html{scroll-behavior:auto}
}