/* ===== PraxTools Image Editor Pro - design system ===== */
:root{
  --bg:#0a0e16;--bg-soft:#0e1420;--panel:#111927;--panel-2:#141d2d;
  --border:#232f45;--border-soft:#1b2436;
  --text:#eaf0fa;--text-dim:#93a3bc;--text-faint:#5f7085;
  --blue:#2864d7;--blue-2:#4d8cff;--blue-soft:#16294a;
  --green:#1f9d63;--green-2:#2ecb84;--green-soft:#0f2c22;
  --radius:14px;--radius-sm:9px;
}
*{box-sizing:border-box}
html,body{margin:0;width:100%;height:100%;background:var(--bg);color:var(--text);font:14px/1.4 -apple-system,Segoe UI,Arial,sans-serif;overflow:hidden}
button,select,input{font:inherit;color:inherit}
button{background:var(--panel-2);border:1px solid var(--border);color:var(--text);border-radius:var(--radius-sm);padding:8px 12px;cursor:pointer;touch-action:manipulation;white-space:nowrap}
button:hover{background:#1b2536;border-color:#31405c}
select{background:var(--panel-2);border:1px solid var(--border);border-radius:var(--radius-sm);padding:8px}
.page{display:flex;flex-direction:column;height:100dvh}

/* ---- header ---- */
header.topbar{height:60px;flex:none;background:var(--bg-soft);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 16px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand-icon{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,#2864d7,#7b7cff);display:flex;align-items:center;justify-content:center;font-size:17px}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text b{font-size:17px;background:linear-gradient(90deg,#39a0ff,#7b7cff);-webkit-background-clip:text;color:transparent}
.brand-text small{font-size:11px;color:var(--text-dim);font-weight:600}
.brand-text .tagline{font-size:9px;color:var(--text-faint);letter-spacing:.4px}
.mainnav{display:flex;gap:4px;flex:1;justify-content:center;min-width:0;overflow:hidden}
.navlink{background:transparent;border-color:transparent;color:var(--text-dim);font-size:12.5px;padding:8px 12px}
.navlink:hover{background:var(--panel-2);color:var(--text)}
.navlink.active{background:var(--blue-soft);color:#bcd4ff;border-color:#2c4a83}
.topbar-right{display:flex;align-items:center;gap:10px;flex:none}
.profile-chip{display:flex;align-items:center;gap:8px;background:var(--panel-2);border:1px solid var(--border);border-radius:20px;padding:5px 12px 5px 5px}
.profile-chip .avatar{width:26px;height:26px;border-radius:50%;background:linear-gradient(135deg,#2864d7,#7b7cff);display:flex;align-items:center;justify-content:center;font-size:13px}
.profile-chip small{display:block;font-size:9px;color:var(--text-dim)}
.icon-btn{padding:8px 10px;font-size:15px}
.lang-select{border-radius:20px;font-size:12px}

/* ---- toolbar ---- */
.toolbar{height:52px;flex:none;background:var(--bg-soft);border-bottom:1px solid var(--border);display:flex;align-items:center;gap:10px;padding:0 14px;overflow-x:auto}
.toolbar-group{display:flex;align-items:center;gap:6px;flex:none}
.toolbar-sep{width:1px;height:26px;background:var(--border);flex:none}
.toolbar .zoomLabel{min-width:46px;text-align:center;font-size:12px;font-weight:600}
.toolbar-right{margin-left:auto}
.toggle-btn.active{background:var(--blue-soft);border-color:#2c4a83;color:#bcd4ff}
button.primary{background:var(--blue);border-color:var(--blue)}
button.primary:hover{background:#3572e8}
button.ghost{background:transparent}
.dropdown{position:relative}
.dropdown-menu{position:absolute;top:calc(100% + 6px);left:0;background:var(--panel-2);border:1px solid var(--border);border-radius:var(--radius-sm);padding:6px;display:none;flex-direction:column;gap:2px;min-width:170px;z-index:60;box-shadow:0 12px 30px #0008}
.dropdown-menu.open{display:flex}
.dropdown-menu button{background:transparent;border:0;text-align:left;padding:8px 10px}
.dropdown-menu button:hover{background:#1b2536}

/* ---- main layout ---- */
.app{flex:1;min-height:0;display:grid;grid-template-columns:78px minmax(0,1fr) 300px;grid-template-rows:1fr auto;gap:0}
.left{grid-column:1;grid-row:1;background:var(--bg-soft);border-right:1px solid var(--border);padding:10px 8px;overflow-y:auto}
.tool{width:100%;display:flex;flex-direction:column;align-items:center;gap:4px;height:58px;margin-bottom:6px;padding:6px;font-size:18px}
.tool span{font-size:9px;color:var(--text-dim)}
.tool.active{outline:1px solid var(--blue-2);background:var(--blue-soft)}
.tool.active span{color:#bcd4ff}
.rail-divider{height:1px;background:var(--border);margin:8px 2px}
.tool.bg-remove{background:var(--blue-soft);border-color:#2c4a83}
.tool.bg-remove span{color:#bcd4ff}
.tool.bg-change{background:var(--green-soft);border-color:#1f5c40}
.tool.bg-change span{color:#8fe8bb}

.center{grid-column:2;grid-row:1;min-width:0;min-height:0;display:flex;flex-direction:column;background:#161d29}
.bar{height:47px;min-height:47px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:center;gap:7px}
#stage{position:relative;flex:1;min-height:0;overflow:auto;padding:22px;background-color:#1d2532;background-image:linear-gradient(45deg,#232c3a 25%,transparent 25%),linear-gradient(-45deg,#232c3a 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#232c3a 75%),linear-gradient(-45deg,transparent 75%,#232c3a 75%);background-size:24px 24px;background-position:0 0,0 12px,12px -12px,-12px 0;overscroll-behavior:contain}
#stage.panning{cursor:grab}
#stage.panning:active{cursor:grabbing}
#empty{position:absolute;inset:0;z-index:2;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;color:var(--text-dim)}
#empty h1{font-size:26px;color:var(--text);margin:0 0 6px}
#empty button{background:var(--blue);border-color:var(--blue);margin-top:10px}
#compareWrap{display:flex;gap:16px;min-height:100%;align-items:stretch;justify-content:center}
.compareSide{position:relative;display:none;flex:1;min-width:0;align-items:center;justify-content:center}
#compareWrap.split .compareSide{display:flex}
#compareWrap:not(.split) .compareSide.result{display:flex;flex:1}
.compareSide canvas{max-width:100%;max-height:100%;box-shadow:0 10px 35px #0009;display:block}
.badge{position:absolute;top:8px;left:8px;z-index:5;background:#111a28ee;border:1px solid var(--border);padding:5px 11px;border-radius:20px;font-size:11px;font-weight:700}
.badge-green{background:#0f2f22ee;border-color:#1f7a4d;color:#8fe8bb}

.right{grid-column:3;grid-row:1;background:var(--bg-soft);border-left:1px solid var(--border);overflow-y:auto;overflow-x:hidden;padding:14px;min-height:0;overscroll-behavior:contain}
.panel-card{background:var(--panel);border:1px solid var(--border-soft);border-radius:var(--radius);padding:14px;margin-bottom:14px}
.panel-card h3{display:flex;align-items:center;gap:8px;font-size:12.5px;text-transform:uppercase;letter-spacing:.6px;color:var(--text-dim);margin:0 0 12px}
.panel-card label{display:block;color:#b8c3d3;font-size:11.5px;margin:10px 0}
.panel-card output{float:right;color:var(--text)}
.panel-card input[type=range]{width:100%;accent-color:var(--blue-2)}
.panel-card input[type=color]{width:100%;height:32px;padding:2px;border:1px solid #334055;background:#0f1622;border-radius:6px}
.panel-card select{width:100%}
.wide{width:100%}
.tabs{display:flex;gap:6px;margin-bottom:12px}
.tab-btn{flex:1;padding:8px 6px;font-size:12px}
.tab-btn.active{background:var(--blue);border-color:var(--blue)}
.tab-content{display:none}
.tab-content.active{display:block}
.thumb-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:2px}
.thumb-grid button{aspect-ratio:1;border-radius:8px;padding:0;overflow:hidden;position:relative;background-size:cover;background-position:center}
.thumb-grid button.selected{outline:2px solid var(--blue-2)}
.pattern-thumb{background-color:#1b2536}
.status{font-size:11px;color:var(--text-dim);margin-top:9px;line-height:1.4}
.layers{max-height:220px;overflow:auto;margin-bottom:8px}
.layer{padding:7px;border:1px solid var(--border-soft);border-radius:8px;margin-bottom:7px;display:flex;align-items:center;gap:8px}
.layer.selected{border-color:#578cf0;background:#19263b}
.layer .thumb{width:34px;height:34px;border-radius:6px;background-size:cover;background-position:center;background-color:#0f1622;flex:none}
.layer .info{flex:1;min-width:0}
.layer .info b{display:block;font-size:12px}
.layer .info small{font-size:10px;color:var(--text-dim)}
.layer .eye{padding:5px 8px;font-size:13px}
.export select{margin-bottom:8px}
button.export-btn{width:100%;background:var(--blue);border-color:var(--blue);margin-top:5px}

/* ---- bottom bar (filmstrip / quick actions / download) ---- */
.bottombar{grid-column:1 / -1;grid-row:2;background:var(--bg-soft);border-top:1px solid var(--border);display:flex;gap:14px;padding:12px 14px;overflow-x:auto}
.bb-card{background:var(--panel);border:1px solid var(--border-soft);border-radius:var(--radius);padding:10px 12px;flex:none}
.bb-card h4{margin:0 0 8px;font-size:11px;text-transform:uppercase;letter-spacing:.5px;color:var(--text-dim)}
.filmstrip{display:flex;gap:10px}
.filmthumb{width:78px;flex:none;text-align:center;cursor:pointer;background:none;border:0;padding:0;color:var(--text)}
.filmthumb .thumb-img{width:78px;height:58px;border-radius:9px;border:2px solid var(--border);background-color:var(--panel-2);background-size:cover;background-position:center;display:flex;align-items:center;justify-content:center;font-size:20px;color:var(--text-faint)}
.filmthumb.active .thumb-img{border-color:var(--blue-2)}
.filmthumb small{display:block;margin-top:4px;font-size:10px;color:var(--text-dim)}
.quick-actions{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.quick-actions button{display:flex;flex-direction:column;align-items:center;gap:4px;padding:9px 14px;font-size:11px}
.quick-actions button.toggle-btn.active{background:var(--blue-soft);border-color:#2c4a83}
.download-card{display:flex;gap:10px;align-items:flex-end}
.download-field{display:flex;flex-direction:column;gap:4px}
.download-field span{font-size:10px;color:var(--text-dim)}

/* ---- footer ---- */
.sitefooter{flex:none;height:56px;background:var(--bg-soft);border-top:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 18px;font-size:11.5px;color:var(--text-dim);gap:12px;overflow:hidden}
.sitefooter .fbrand{display:flex;align-items:center;gap:8px;flex:none;color:var(--text)}
.sitefooter .fbrand b{font-size:14px}
.sitefooter .flinks{display:flex;gap:22px}
.sitefooter .flinks div{display:flex;gap:6px;align-items:center;white-space:nowrap}
.sitefooter .flinks small{display:block;color:var(--text-faint);font-size:10px}
.sitefooter .ftamil{white-space:nowrap;flex:none}

.mobileDock{display:none}
.toast{position:fixed;left:50%;bottom:20px;transform:translate(-50%,20px);background:#111a28;border:1px solid #38506e;border-radius:9px;padding:10px 15px;opacity:0;pointer-events:none;transition:.2s;z-index:80}
.toast.show{opacity:1;transform:translate(-50%,0)}

@media(max-width:1150px){
  .app{grid-template-columns:70px minmax(0,1fr) 270px}
  .mainnav{display:none}
}
@media(max-width:760px){
  html,body{overflow:hidden}
  header.topbar{height:54px;padding:0 9px}
  .brand-text .tagline{display:none}
  .profile-chip,.lang-select{display:none}
  .toolbar{height:46px}
  .toolbar-right{display:none}
  .sitefooter{display:none}
  .app{grid-template-columns:1fr;grid-template-rows:1fr;height:calc(100dvh - 54px - 46px - 62px)}
  .left{display:none}
  .right{display:none;position:fixed;z-index:30;right:0;top:100px;bottom:62px;width:min(92vw,360px);box-shadow:-15px 0 35px #0009}
  .right.open{display:block}
  .bottombar{display:none}
  .center{grid-column:1;grid-row:1;height:100%;width:100%}
  #stage{padding:10px}
  #empty h1{font-size:22px}
  .mobileDock{position:fixed;z-index:40;left:0;right:0;bottom:0;height:62px;background:#0d1420;border-top:1px solid var(--border);display:grid;grid-template-columns:repeat(5,1fr);padding-bottom:env(safe-area-inset-bottom)}
  .mobileDock button{border:0;border-radius:0;background:transparent;font-size:19px;padding:5px}
  .mobileDock small{display:block;font-size:9px;color:#a8b4c7}
}

/* PraxTools unified visual layer */
body{font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif}.topbar{box-shadow:0 5px 18px rgba(15,23,42,.08)}button,select,input{border-radius:9px}