:root { color-scheme: light; }
body { font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif; margin: 0; background: #f2f6ff; color: #111; }
a { color: #0b5ed7; text-decoration: none; }
a:hover { text-decoration: underline; }
.container { max-width: 1100px; margin: 0 auto; padding: 18px; }
.nav { display:flex; gap:12px; align-items:center; padding: 12px 18px; background:#ffffff; border-bottom:1px solid #dfe7f7; position: sticky; top:0; z-index: 10; }
.nav .brand { font-weight: 800; letter-spacing:.3px; }
.nav .spacer { flex:1; }
.badge { display:inline-block; padding:2px 8px; border-radius: 999px; background:#eef3ff; border:1px solid #d6e2ff; font-size:12px; }
.card { background:#fff; border:1px solid #e7ebf3; border-radius:14px; padding:16px; box-shadow: 0 6px 18px rgba(15, 23, 42, 0.04); }
.grid { display:grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 900px){ .grid{ grid-template-columns: 1fr; } }
h1,h2,h3 { margin: 0 0 10px 0; }
.small { color:#445; font-size: 13px; }
.btn { display:inline-flex; align-items:center; gap:8px; padding:10px 12px; border-radius: 12px; border:1px solid #d8deea; background:#fff; cursor:pointer; }
.btn.primary{ background:#0b5ed7; color:#fff; border-color:#0b5ed7; }
.btn.primary:hover{ filter: brightness(0.98); }
.btn.danger{ background:#dc3545; color:#fff; border-color:#dc3545; }
.btn:disabled{ opacity:.55; cursor:not-allowed; }
input, select, textarea { width: 100%; padding: 10px 12px; border-radius: 12px; border:1px solid #d8deea; background:#fff; box-sizing:border-box; }
label { display:block; font-size: 13px; margin: 10px 0 6px; color:#334; }
.table { width:100%; border-collapse: collapse; }
.table th, .table td { padding: 10px 8px; border-bottom:1px solid #e7ebf3; text-align:left; vertical-align: middle; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.row { display:flex; gap:10px; flex-wrap: wrap; }
.right { margin-left:auto; }
.kbd { padding: 2px 6px; border-radius: 8px; border:1px solid #d8deea; background:#f8fafc; font-size: 12px; }
.path { display:flex; align-items:center; gap:6px; flex-wrap: wrap; }
.path a { padding:2px 6px; border-radius: 10px; background:#f1f5ff; border:1px solid #dde6ff; }
.flash { padding:10px 12px; border-radius: 12px; margin: 12px 0; }
.flash.ok { background:#eafff0; border:1px solid #bcecc9; }
.flash.err { background:#fff0f2; border:1px solid #f1b4bd; }
.modal-backdrop { position: fixed; inset: 0; background: rgba(2,6,23,.55); display:none; align-items:center; justify-content:center; padding: 16px; z-index: 999; }
.modal { background:#fff; border-radius: 16px; max-width: 520px; width: 100%; padding: 16px; border:1px solid #e7ebf3; box-shadow: 0 20px 60px rgba(2,6,23,.35); }
.modal h3{ margin-bottom:8px; }
.modal .actions{ display:flex; gap:10px; justify-content:flex-end; margin-top:12px; }
.preview { max-height: 520px; overflow:auto; }


/* Auth */
.auth-title{
  font-size: 44px;
  letter-spacing: .6px;
  font-weight: 850;
  margin: 0 0 6px 0;
  color: #0b2a4a;
}
.auth-subtitle{ margin: 0 0 14px 0; color:#3b556d; }

/* Part 2 */
#dropZone { background: #f8fbff; }
input[type="checkbox"] { width: 16px; height: 16px; }

/* Modal */
.modal-bg{ position:fixed; inset:0; background:rgba(10,20,40,.35); display:flex; align-items:center; justify-content:center; padding:16px; z-index:9999; }
.modal{ width:min(520px, 100%); }
.kbd{ padding:2px 8px; border:1px solid #cbd5e1; border-radius:999px; background:#fff; }

.two-pane{display:flex; gap:14px; align-items:flex-start;}
.sidebar{width:300px; position:sticky; top:12px; padding:12px;}
.sidebar-head .brand-mini{font-weight:700; margin-bottom:6px;}
.crumbs{display:flex; flex-wrap:wrap; gap:6px; align-items:center;}
.crumbs a{color:#2563eb; text-decoration:none;}
.crumbs .sep{color:#94a3b8;}
.sidebar-actions{margin:10px 0 12px 0;}
.folder-list{display:flex; flex-direction:column; gap:6px;}
.folder-item{display:flex; gap:10px; align-items:center; padding:10px 10px; border:1px solid #e2e8f0; border-radius:12px; text-decoration:none; color:#0f172a; background:#fff;}
.folder-item:hover{background:#f8fafc;}
.folder-item .ico{width:22px; text-align:center;}
.folder-item .name{flex:1; font-weight:600; overflow:hidden; text-overflow:ellipsis; white-space:nowrap;}
.folder-item .meta{color:#64748b; font-size:12px;}
.folder-item.up{border-style:dashed;}

.content{flex:1; min-width:0;}
.content-head{display:flex; justify-content:space-between; align-items:flex-start; gap:12px; flex-wrap:wrap; margin-bottom:10px;}

.dropzone{border:2px dashed #cbd5e1; border-radius:16px; padding:14px; margin:10px 0 14px 0; background:#f8fafc;}
.dropzone.hover{background:#eef2ff; border-color:#93c5fd;}

.file-grid{display:grid; grid-template-columns:repeat(auto-fill, minmax(240px, 1fr)); gap:12px;}
.file-card{border:1px solid #e2e8f0; border-radius:16px; padding:12px; background:#fff; display:flex; flex-direction:column; gap:10px; box-shadow:0 1px 0 rgba(15,23,42,.03);}
.file-top{display:flex; flex-direction:column; gap:6px;}
.file-ico{font-size:22px;}
.file-name{font-weight:700; overflow:hidden; text-overflow:ellipsis; white-space:nowrap;}
.file-meta{color:#64748b;}
.file-actions{display:flex; gap:8px; flex-wrap:wrap;}

@media (max-width: 900px){
  .two-pane{flex-direction:column;}
  .sidebar{width:100%; position:relative;}
}

/* Topbar layout */
.topbar{display:flex; align-items:center; justify-content:space-between; gap:12px; padding:10px 14px; background:#fff; border-bottom:1px solid #e2e8f0; position:sticky; top:0; z-index:10;}
.topbar-left{display:flex; align-items:center; gap:14px; flex-wrap:wrap;}
.brand{font-weight:800; text-decoration:none; color:#0f172a; font-size:20px;}
.nav-links{display:flex; gap:10px; flex-wrap:wrap;}
.nav-links a{text-decoration:none; color:#0f172a; padding:8px 10px; border-radius:12px;}
.nav-links a:hover{background:#f1f5f9;}
.topbar-right{display:flex; align-items:center; gap:10px; margin-left:auto;}

.user-chip{display:flex; align-items:center; gap:8px; padding:6px 10px; border:1px solid #e2e8f0; border-radius:999px; background:#fff;}
.avatar{width:28px; height:28px; border-radius:999px; object-fit:cover; border:1px solid #e2e8f0;}
.avatar-lg{width:72px; height:72px; border-radius:999px; object-fit:cover; border:1px solid #e2e8f0;}

/* Folder share icon button */
.icon-btn{margin-left:auto; border:1px solid #e2e8f0; background:#fff; color:#2563eb; width:30px; height:30px; border-radius:10px; cursor:pointer;}
.icon-btn:hover{background:#f1f5f9;}

/* Nicer file input */
.file-input{position:absolute; left:-9999px; width:1px; height:1px; overflow:hidden;}
.file-btn{border:1px solid #cbd5e1; background:#fff; color:#0f172a;}
.file-btn:hover{background:#f8fafc;}

/* Upload progress */
.upload-progress{display:flex; align-items:center; width:220px; height:12px; background:#e2e8f0; border-radius:999px; position:relative; overflow:hidden; margin-left:6px;}
.upload-progress .bar{height:100%; width:0%; background:#60a5fa;}
.upload-progress .pct{position:absolute; right:8px; top:-18px; font-size:12px; color:#64748b;}


/* Force-hide native file input (avoid duplicated ugly control) */
.file-input{
  display:none !important;
}