:root{
  --navy:#0b3d62; --navy-2:#0e4d7b; --accent:#1e88c7; --accent-d:#1565a0;
  --bg:#f4f6f9; --card:#ffffff; --line:#e2e8f0; --text:#1f2a37; --muted:#6b7a8d;
  --danger:#d64545; --danger-d:#b53636; --ok:#2e9e6b; --warn:#c9871f;
  --shadow:0 1px 3px rgba(16,42,67,.10),0 6px 18px rgba(16,42,67,.06);
  --radius:12px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg); color:var(--text); -webkit-font-smoothing:antialiased;
  padding-bottom:40px;
}
a{color:var(--accent-d);text-decoration:none}
.hidden{display:none !important}
.muted{color:var(--muted)}
.small{font-size:13px}
code{background:#eef2f6;border-radius:5px;padding:1px 6px;font-size:12px}

/* App bar */
.appbar{
  position:sticky; top:0; z-index:30;
  background:linear-gradient(120deg,var(--navy),var(--navy-2));
  color:#fff; display:flex; align-items:center; justify-content:space-between;
  padding:12px 18px; box-shadow:var(--shadow);
}
.brand{display:flex;align-items:center;gap:12px}
.logo{font-size:26px;line-height:1}
.logo-img{height:44px;width:auto;display:block;background:#fff;border-radius:10px;padding:4px 8px;box-shadow:0 1px 5px rgba(0,0,0,.18)}
.brand-title{font-size:18px;font-weight:700;letter-spacing:.2px}
.brand-sub{font-size:12px;opacity:.8}
.appbar-right{display:flex;gap:8px;align-items:center}
.admin-pill{font-size:12px;background:rgba(255,255,255,.18);padding:4px 10px;border-radius:999px}

/* Buttons */
.btn{
  border:1px solid var(--line); background:var(--card); color:var(--text);
  padding:9px 14px; border-radius:10px; font-size:14px; font-weight:600;
  cursor:pointer; transition:.15s; white-space:nowrap; line-height:1;
}
.btn:hover{border-color:#cbd5e1;background:#f8fafc}
.btn:active{transform:translateY(1px)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}
.btn.primary:hover{background:var(--accent-d);border-color:var(--accent-d)}
.btn.ghost{background:transparent;border-color:rgba(255,255,255,.45);color:#fff}
.btn.ghost:hover{background:rgba(255,255,255,.12)}
.toolbar .btn.ghost,.selection-bar .btn.ghost{border-color:var(--line);color:var(--text)}
.toolbar .btn.ghost:hover{background:#f8fafc}
.btn.danger{background:var(--danger);border-color:var(--danger);color:#fff}
.btn.danger:hover{background:var(--danger-d)}
.btn.small{padding:7px 11px;font-size:13px}
.btn:disabled{opacity:.5;cursor:not-allowed}

/* Breadcrumb */
.breadcrumb{
  display:flex;flex-wrap:wrap;gap:4px;align-items:center;
  padding:12px 18px 0;font-size:14px;
}
.breadcrumb a{color:var(--navy);font-weight:600;padding:3px 6px;border-radius:7px}
.breadcrumb a:hover{background:#e8eef4}
.breadcrumb .sep{color:var(--muted)}
.breadcrumb .current{color:var(--muted);padding:3px 6px}

/* Toolbar */
.toolbar{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;padding:14px 18px 6px}
.toolbar-left,.toolbar-right{display:flex;gap:8px;flex-wrap:wrap}

/* Selection bar */
.selection-bar{
  position:sticky;top:64px;z-index:20;
  display:flex;align-items:center;gap:8px;margin:6px 18px 0;
  background:#fff;border:1px solid var(--line);border-radius:12px;
  padding:10px 14px;box-shadow:var(--shadow);
}
.selection-bar .spacer{flex:1}
#selCount{font-weight:700}

/* Content grids */
.content{padding:14px 18px 60px}
.grid{display:grid;gap:14px}
.grid.folders{grid-template-columns:repeat(auto-fill,minmax(180px,1fr));margin-bottom:18px}
.grid.files{grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}

/* Folder card */
.folder{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:14px;display:flex;align-items:center;gap:12px;cursor:pointer;
  box-shadow:var(--shadow);transition:.15s;position:relative;
}
.folder:hover{transform:translateY(-2px);border-color:#cdd9e5}
.folder .ic{font-size:30px;line-height:1}
.folder .meta{overflow:hidden;min-width:0}
.folder .nm{font-weight:700;overflow-wrap:break-word;word-break:break-word;line-height:1.25}
.folder .ct{font-size:12px;color:var(--muted);margin-top:2px}
.folder.date .ic{filter:saturate(.4)}
.folder-actions{position:absolute;top:8px;right:8px;display:flex;gap:4px;opacity:0;transition:.15s}
.folder:hover .folder-actions{opacity:1}
.icon-btn{
  border:none;background:rgba(255,255,255,.92);border:1px solid var(--line);
  width:30px;height:30px;border-radius:8px;cursor:pointer;font-size:14px;line-height:1;
  display:flex;align-items:center;justify-content:center;
}
.icon-btn:hover{background:#eef3f8}
.icon-btn.del:hover{background:#fdeaea;border-color:#f3c0c0}

/* File card */
.file{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow);transition:.15s;position:relative;cursor:pointer;
}
.file:hover{transform:translateY(-2px);border-color:#cdd9e5}
.file .thumb{aspect-ratio:1/1;width:100%;background:#eef2f6 center/cover no-repeat;display:block}
.file .cap{padding:8px 10px}
.file .fn{font-size:12px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.file .sz{font-size:11px;color:var(--muted)}
.file .play{
  position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  width:46px;height:46px;border-radius:50%;background:rgba(11,61,98,.72);
  color:#fff;display:flex;align-items:center;justify-content:center;font-size:20px;
  padding-left:3px;pointer-events:none;
}
.file .badge{
  position:absolute;top:8px;left:8px;background:rgba(11,61,98,.78);color:#fff;
  font-size:10px;font-weight:700;letter-spacing:.5px;padding:2px 7px;border-radius:6px;
}
.file-actions{position:absolute;top:6px;right:6px;display:flex;gap:4px;opacity:0;transition:.15s}
.file:hover .file-actions{opacity:1}
.file .check{
  position:absolute;top:8px;left:8px;width:24px;height:24px;border-radius:7px;
  background:rgba(255,255,255,.92);border:2px solid #fff;box-shadow:var(--shadow);
  display:flex;align-items:center;justify-content:center;font-size:15px;color:#fff;
}
.selecting .file .file-actions,.selecting .file .badge{display:none}
.file.selected{outline:3px solid var(--accent);outline-offset:-3px}
.file.selected .check{background:var(--accent);border-color:#fff}

.empty{text-align:center;color:var(--muted);padding:70px 20px}
.empty-art{font-size:54px;margin-bottom:8px}
.empty p{margin:4px 0}

/* Modals */
.modal{position:fixed;inset:0;z-index:60;background:rgba(13,28,43,.5);
  display:flex;align-items:center;justify-content:center;padding:16px}
.modal-card{background:#fff;border-radius:16px;width:min(560px,100%);max-height:92vh;
  display:flex;flex-direction:column;overflow:hidden;box-shadow:0 20px 60px rgba(0,0,0,.3)}
.modal-card.narrow{width:min(420px,100%)}
.modal-head{display:flex;align-items:center;justify-content:space-between;
  padding:16px 18px;border-bottom:1px solid var(--line)}
.modal-head h2{margin:0;font-size:17px}
.modal-head .target{color:var(--accent-d)}
.x{border:none;background:none;font-size:18px;cursor:pointer;color:var(--muted);padding:4px}
.modal-body{padding:18px;overflow:auto}
.modal-foot{display:flex;justify-content:flex-end;gap:10px;padding:14px 18px;border-top:1px solid var(--line)}
.field{display:block;margin:12px 0}
.field>span{display:block;font-size:13px;font-weight:600;margin-bottom:6px}
.field input{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:10px;font-size:15px}
.field input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(30,136,199,.15)}
.error{color:var(--danger)}

/* Dropzone */
.dropzone{border:2px dashed #c5d2df;border-radius:14px;padding:26px 16px;text-align:center;
  cursor:pointer;transition:.15s;background:#f8fbfd}
.dropzone:hover,.dropzone.drag{border-color:var(--accent);background:#eef7fc}
.dz-icon{font-size:30px;color:var(--accent)}
.dropzone p{margin:6px 0}
.file-list{list-style:none;margin:14px 0 0;padding:0;max-height:210px;overflow:auto}
.file-list li{display:flex;align-items:center;gap:10px;padding:8px 4px;border-bottom:1px solid var(--line);font-size:13px}
.file-list li .fl-name{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.file-list li .fl-size{color:var(--muted);font-size:12px}
.file-list li.too-big{color:var(--danger)}
.file-list li .st{font-size:14px;width:18px;text-align:center}
.progress{height:10px;background:#e6edf3;border-radius:999px;overflow:hidden;margin-top:14px}
.progress .bar{height:100%;width:0;background:var(--accent);transition:width .15s}
.status{margin-top:8px;min-height:18px}

/* Lightbox */
.lightbox{position:fixed;inset:0;z-index:80;background:rgba(8,16,24,.93);
  display:flex;flex-direction:column;align-items:center;justify-content:center}
.lb-stage{flex:1;display:flex;align-items:center;justify-content:center;width:100%;
  padding:54px 16px 8px;overflow:hidden}
.lb-stage img,.lb-stage video{max-width:96vw;max-height:82vh;border-radius:8px;
  box-shadow:0 10px 40px rgba(0,0,0,.5);background:#000}
.lb-close{position:absolute;top:14px;right:16px;z-index:2;background:rgba(255,255,255,.12);
  color:#fff;border:none;width:42px;height:42px;border-radius:50%;font-size:18px;cursor:pointer}
.lb-close:hover{background:rgba(255,255,255,.25)}
.lb-nav{position:absolute;top:50%;transform:translateY(-50%);background:rgba(255,255,255,.12);
  color:#fff;border:none;width:50px;height:50px;border-radius:50%;font-size:30px;cursor:pointer;z-index:2}
.lb-nav:hover{background:rgba(255,255,255,.25)}
.lb-nav.prev{left:14px}.lb-nav.next{right:14px}
.lb-bar{display:flex;align-items:center;gap:14px;color:#fff;padding:10px 18px 22px;max-width:96vw}
.lb-name{font-size:14px;opacity:.9;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:60vw}

/* Toast */
.toast{position:fixed;left:50%;bottom:26px;transform:translateX(-50%) translateY(20px);
  background:var(--navy);color:#fff;padding:14px 22px;border-radius:12px;font-weight:600;
  box-shadow:0 10px 30px rgba(0,0,0,.25);opacity:0;transition:.25s;z-index:100;max-width:90vw;text-align:center}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.toast.ok{background:var(--ok)}
.toast.warn{background:var(--warn)}
.toast.err{background:var(--danger)}

/* Drag & drop upload (desktop) */
body.dragging .folder{outline:2px dashed rgba(30,136,199,.55);outline-offset:-2px}
.folder.drop-hot{outline:3px solid var(--accent) !important;outline-offset:-3px;background:#eaf5fc;transform:translateY(-2px)}
.drop-hint{position:fixed;top:84px;left:50%;transform:translateX(-50%);z-index:90;
  background:var(--accent);color:#fff;padding:10px 18px;border-radius:999px;font-weight:600;
  box-shadow:0 8px 24px rgba(13,40,67,.3);pointer-events:none;font-size:14px;max-width:92vw;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.drop-hint b{font-weight:800}
.dnd-bar{position:fixed;left:0;right:0;bottom:0;z-index:95;background:#fff;border-top:1px solid var(--line);
  box-shadow:0 -4px 18px rgba(13,40,67,.1);padding:10px 16px;display:flex;flex-direction:column;gap:7px}
.dnd-bar-track{height:8px;background:#e6edf3;border-radius:999px;overflow:hidden}
.dnd-bar-fill{height:100%;width:0;background:var(--accent);transition:width .15s}
.dnd-bar-text{font-size:13px;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

@media(max-width:600px){
  .brand-sub{display:none}
  .toolbar{padding:12px 12px 4px}
  .breadcrumb{padding:10px 12px 0}
  .content{padding:12px 12px 60px}
  .selection-bar{margin:6px 12px 0;flex-wrap:wrap}
  .grid.folders{grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}
  .grid.files{grid-template-columns:repeat(auto-fill,minmax(110px,1fr));gap:10px}
  .btn{padding:8px 12px}
  .lb-name{max-width:42vw}
}