[hidden]{display:none!important}
/* Layout: nền trắng, app kéo dài hết màn hình; ô giữa (danh sách file / lưới trang) giãn lấp chỗ trống; chân trang sát đáy */
:root{
  --bg:#ffffff; --panel:#ffffff; --soft:#f2f6f4; --soft2:#e7eeea; --line:#dbe4df; --edge:#c3cec8;
  --fg:#11261a; --muted:#5a6b62; --g1:#22c55e; --g2:#16a34a; --gdark:#0d6b31; --gtext:#073d1e;
  --gold:#facc15; --danger:#b91c1c;
  --f-body:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-mono:"JetBrains Mono",ui-monospace,Menlo,Consolas,monospace;
  color-scheme:light;
}
*{box-sizing:border-box}
html,body{height:100%}
body{padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
body{background:var(--bg);color:var(--fg);font-family:var(--f-body);font-size:14px;line-height:1.4;margin:0}
p{margin:0}
.wrap{max-width:640px;min-height:100%;margin:0 auto;padding-left:max(10px,env(safe-area-inset-left,0px));padding-right:max(10px,env(safe-area-inset-right,0px));padding-block:8px 6px;display:flex;flex-direction:column;gap:10px}

/* Tiêu đề app */
header{display:flex;align-items:center;justify-content:space-between;gap:10px;background:linear-gradient(135deg,#0f5132,#15803d 70%,#22a35a);border-radius:16px;padding:10px 12px;box-shadow:0 5px 0 #0a3d25,0 10px 18px rgba(10,61,37,.25)}
.brand{display:flex;align-items:center;gap:10px;min-width:0}
.logo{width:48px;height:48px;border-radius:13px;background:linear-gradient(160deg,#ffffff,#d1fae5);display:grid;place-items:center;color:var(--gtext);font-weight:800;font-size:13px;flex:none;box-shadow:inset 0 2px 0 #fff,0 4px 0 #0a3d25}
.brand h1{margin:0;font-size:28px;font-weight:800;letter-spacing:.5px;line-height:1.05;background:linear-gradient(90deg,#ffffff,#fde68a);-webkit-background-clip:text;background-clip:text;color:transparent}
.brand p{color:#d1fae5;font-size:11px;font-weight:700;letter-spacing:1.4px;text-transform:uppercase}

/* Nút 3D */
button{font-family:inherit;font-size:13px;cursor:pointer;border-radius:10px;border:1px solid var(--line);background:linear-gradient(180deg,#ffffff,var(--soft2));color:var(--gtext);padding:8px 12px;font-weight:700;box-shadow:inset 0 1px 0 #fff,0 4px 0 var(--edge),0 6px 10px rgba(17,38,26,.12);transition:transform .08s,box-shadow .08s}
button:active:not(:disabled){transform:translateY(3px);box-shadow:inset 0 1px 0 #fff,0 1px 0 var(--edge)}
button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,.drop:focus-visible{outline:2px solid var(--g2);outline-offset:2px}
button:disabled{opacity:.45;cursor:not-allowed}
.primary{background:linear-gradient(180deg,#4ade80,var(--g2));color:#03200d;border-color:#15803d;font-size:14px;font-weight:800;padding:10px 14px;box-shadow:inset 0 1px 0 rgba(255,255,255,.5),0 4px 0 var(--gdark),0 6px 12px rgba(13,107,49,.25);white-space:nowrap}
.primary:active:not(:disabled){box-shadow:inset 0 1px 0 rgba(255,255,255,.3),0 1px 0 var(--gdark)}
.iconbtn{width:44px;height:44px;padding:0;border-radius:50%;font-size:22px;display:grid;place-items:center;flex:none;line-height:1}

/* Tab 3D */
.tabs{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.tabs button{font-size:15px;font-weight:800;padding:10px;color:var(--muted)}
.tabs button[aria-selected="true"]{background:linear-gradient(180deg,#4ade80,var(--g2));color:#03200d;border-color:#15803d;box-shadow:inset 0 2px 4px rgba(0,0,0,.2),0 1px 0 var(--gdark);transform:translateY(3px)}

.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:10px;display:flex;flex-direction:column;gap:8px;box-shadow:0 2px 8px rgba(17,38,26,.06)}
/* Tiêu đề mục: gradient xanh sang trắng, viết hoa */
.sec{display:flex;align-items:center;gap:8px;margin:0;font-size:15px;font-weight:800;text-transform:uppercase;letter-spacing:.8px;color:var(--gtext);background:linear-gradient(90deg,#22c55e,#86efac 45%,#ffffff 100%);padding:7px 10px;border-radius:9px}
.sec .ck{display:grid;place-items:center;width:20px;height:20px;border-radius:50%;background:var(--gtext);color:var(--gold);font-size:12px;flex:none}
.sec .t{min-width:0}
.sec small{margin-left:auto;font-weight:600;letter-spacing:0;text-transform:none;font-size:12px;color:#14532d}
.muted{color:var(--muted);font-size:12.5px}

/* Ô chọn file 3D */
.drop{display:flex;align-items:center;justify-content:center;gap:8px;border-radius:12px;padding:11px 12px;text-align:center;cursor:pointer;background:linear-gradient(180deg,#ffffff,var(--soft2));border:1px solid var(--line);box-shadow:inset 0 1px 0 #fff,0 4px 0 var(--edge),0 6px 10px rgba(17,38,26,.12);transition:transform .08s,box-shadow .08s}
.drop:active{transform:translateY(3px);box-shadow:0 1px 0 var(--edge)}
.drop.over{outline:2px dashed var(--g2);outline-offset:3px}
.drop strong{color:var(--gtext);font-size:14px}
.drop .plus{display:grid;place-items:center;width:24px;height:24px;border-radius:50%;background:var(--gold);color:#3a2a00;font-weight:800;flex:none;box-shadow:0 2px 0 #ca8a04}

/* Ô giữa giãn lấp chỗ trống */
#mainView{display:flex;flex-direction:column;gap:10px;flex:1 1 auto;min-height:0}
.pane{display:flex;flex-direction:column;gap:10px;flex:1 1 auto;min-height:0}
.card.grow{flex:1 1 auto;min-height:150px}
.flist{display:flex;flex-direction:column;gap:6px;margin:0;padding:2px 2px 6px;list-style:none;flex:1 1 0;min-height:0;overflow:auto}
.flist:empty{display:none}
.fitem{display:grid;grid-template-columns:auto 34px 1fr auto;align-items:center;gap:8px;background:linear-gradient(180deg,#ffffff,var(--soft));border:1px solid var(--line);border-radius:10px;padding:6px;box-shadow:0 3px 0 var(--edge)}
.fitem.dragging{opacity:.5}
.fitem .num{font-family:var(--f-mono);color:var(--g2);width:18px;text-align:center;font-size:13px;font-weight:700}
.fitem canvas{width:34px;height:46px;border-radius:3px;background:#fff;display:block;object-fit:contain;border:1px solid var(--line)}
.fitem .meta{min-width:0}
.fitem .name{font-weight:600;font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.fitem .muted{font-size:11.5px}
.fitem .acts{display:flex;gap:5px}
.fitem .acts button{padding:5px 8px;font-size:12px;box-shadow:inset 0 1px 0 #fff,0 3px 0 var(--edge)}

.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.row>*{min-width:0}
.out{display:flex;gap:8px;align-items:stretch}
.out input{flex:1 1 auto;min-width:0}
label.f{display:flex;flex-direction:column;gap:4px;font-size:12.5px;color:var(--muted)}
.row label.f{flex:1 1 140px}
input[type=text],input[type=number],input[type=password],select,textarea{font-family:inherit;font-size:16px;background:#f8fbf9;color:var(--fg);border:1px solid var(--line);border-radius:10px;padding:8px 10px;width:100%;box-shadow:inset 0 2px 3px rgba(17,38,26,.08)}
input.mono{font-family:var(--f-mono)}

.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(68px,1fr));grid-auto-rows:max-content;gap:8px;flex:1 1 0;min-height:0;overflow:auto;padding:2px 2px 6px}
.grid:empty{display:none}
.pg{position:relative;border-radius:8px;padding:4px;display:flex;flex-direction:column;align-items:center;gap:3px;box-shadow:inset 0 1px 0 #fff,0 3px 0 var(--edge)}
.pg canvas{width:100%;aspect-ratio:1/1.414;background:#fff;border-radius:3px;display:block;max-width:100%;object-fit:contain;border:1px solid var(--line)}
.pg .n{font-family:var(--f-mono);font-size:11px;color:var(--muted)}
.pg.on{background:linear-gradient(180deg,#4ade80,var(--g2));border-color:#15803d;transform:translateY(2px);box-shadow:inset 0 2px 4px rgba(0,0,0,.2),0 1px 0 var(--gdark)}
.pg.on .n{color:#03200d;font-weight:800}
.pg.on::after{content:"✓";position:absolute;top:3px;right:4px;background:var(--gold);color:#3a2a00;font-weight:800;border-radius:50%;width:17px;height:17px;display:grid;place-items:center;font-size:11px}

.msg{border-radius:9px;padding:7px 10px;font-size:13px}
.msg.ok{background:#dcfce7;color:#166534}
.msg.err{background:#fee2e2;color:var(--danger)}
.msg.info{background:#fef9c3;color:#854d0e}
.notice{border:1px solid #fde68a;background:#fefce8;color:#854d0e;border-radius:10px;padding:8px 12px;font-size:13px}
.closed{text-align:center;padding:32px 16px}
.closed h2{margin:0 0 6px}

/* Chân trang sát đáy */
footer{position:relative;margin-top:auto;display:flex;flex-direction:column;align-items:center;gap:1px;color:var(--muted);font-size:11.5px;padding-top:4px}
footer .by{color:var(--gtext);font-weight:700;letter-spacing:.3px;font-size:12.5px}
.key{position:absolute;right:0;bottom:0;opacity:.3;padding:6px;font-size:15px;text-decoration:none}
.key:hover{opacity:.8}
.key:active:not(:disabled){transform:none;box-shadow:none}

.modal{position:fixed;inset:0;background:rgba(10,30,20,.55);display:flex;align-items:flex-start;justify-content:center;overflow:auto;z-index:20;padding:calc(20px + env(safe-area-inset-top,0px)) max(12px,env(safe-area-inset-right,0px)) 20px max(12px,env(safe-area-inset-left,0px))}
.modal .card{width:100%;max-width:500px;gap:12px;box-shadow:0 20px 40px rgba(0,0,0,.25)}
.seg{display:flex;gap:8px;flex-wrap:wrap}
.seg button[aria-pressed="true"]{background:linear-gradient(180deg,#4ade80,var(--g2));color:#03200d;border-color:#15803d;transform:translateY(3px);box-shadow:inset 0 2px 4px rgba(0,0,0,.2),0 1px 0 var(--gdark)}
.chk{display:flex;align-items:center;gap:8px;font-size:14px}
.chk input{width:18px;height:18px;accent-color:var(--g2)}
.stat{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.stat div{background:var(--soft);border-radius:10px;padding:8px 10px}
.stat b{display:block;font-size:22px;font-variant-numeric:tabular-nums}
.busy{display:inline-block;width:13px;height:13px;border:2px solid currentColor;border-right-color:transparent;border-radius:50%;animation:spin .8s linear infinite;vertical-align:-2px;margin-right:6px}
@keyframes spin{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){.busy{animation:none}button,.drop{transition:none}}
@media (max-width:380px){.brand h1{font-size:24px}.logo{width:42px;height:42px}}