:root {
  --bg: #0b0f14;
  --bg-elevated: #121821;
  --bg-card: #151c27;
  --border: #232c3a;
  --text: #e6edf3;
  --text-muted: #8b98a9;
  --accent: #4f8cff;
  --accent-2: #22c55e;
  --accent-warn: #f59e0b;
  --accent-danger: #ef4444;
  --accent-cpu: #a855f7;
  --accent-ram: #06b6d4;
  --radius: 10px;
  --shadow: 0 4px 20px rgba(0,0,0,0.35);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
input, select, textarea, button { font-family: inherit; font-size: 14px; }

/* ---------- Login ---------- */
.login-body {
  display: flex; align-items: center; justify-content: center; min-height: 100vh;
  background: radial-gradient(circle at top, #17202c 0%, #0b0f14 60%);
}
.login-card {
  width: 360px; background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow);
}
.login-logo { display: flex; align-items: center; gap: 10px; color: var(--accent); }
.login-logo h1 { font-size: 20px; margin: 0; color: var(--text); }
.login-sub { color: var(--text-muted); margin: 8px 0 20px; }
.login-form { display: flex; flex-direction: column; gap: 14px; }
.login-form label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--text-muted); }
.login-form input {
  background: var(--bg-elevated); border: 1px solid var(--border); color: var(--text);
  padding: 10px 12px; border-radius: 8px; outline: none;
}
.login-form input:focus { border-color: var(--accent); }
.alert { padding: 10px 12px; border-radius: 8px; margin-bottom: 14px; font-size: 13px; }
.alert-error { background: rgba(239,68,68,0.12); color: #fca5a5; border: 1px solid rgba(239,68,68,0.3); }

/* ---------- Buttons ---------- */
.btn {
  background: var(--bg-elevated); color: var(--text); border: 1px solid var(--border);
  padding: 9px 14px; border-radius: 8px; display: inline-flex; align-items: center; gap: 6px;
  transition: background .15s, border-color .15s;
}
.btn:hover { border-color: var(--accent); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: white; }
.btn-primary:hover { background: #3f7ae0; }
.btn-danger { background: rgba(239,68,68,0.12); border-color: rgba(239,68,68,0.4); color: #fca5a5; }
.btn-danger:hover { background: rgba(239,68,68,0.22); }
.btn-block { width: 100%; justify-content: center; }
.btn-sm { padding: 6px 10px; font-size: 12.5px; }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.icon-btn {
  background: transparent; border: 1px solid transparent; color: var(--text-muted);
  width: 34px; height: 34px; border-radius: 8px; display: inline-flex; align-items: center; justify-content: center;
}
.icon-btn:hover { background: var(--bg-elevated); color: var(--text); }

/* ---------- App shell ---------- */
.app-shell { display: flex; min-height: 100vh; }
.sidebar {
  width: 230px; background: var(--bg-card); border-right: 1px solid var(--border);
  display: flex; flex-direction: column; flex-shrink: 0; position: sticky; top: 0; height: 100vh;
}
.sidebar-brand { display: flex; align-items: center; gap: 10px; padding: 20px 18px; color: var(--accent); font-weight: 600; }
.sidebar-nav { display: flex; flex-direction: column; gap: 2px; padding: 8px; flex: 1; }
.nav-item {
  display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-radius: 8px;
  color: var(--text-muted); font-size: 13.5px;
}
.nav-item:hover { background: var(--bg-elevated); color: var(--text); }
.nav-item.active { background: rgba(79,140,255,0.14); color: var(--accent); }
.sidebar-footer { padding: 12px 8px; border-top: 1px solid var(--border); display: flex; flex-direction: column; gap: 4px; }
.user-chip { display: flex; align-items: center; gap: 8px; padding: 8px 12px; color: var(--text-muted); font-size: 13px; }
.nav-item.logout { color: #fca5a5; }

.main-area { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.topbar {
  height: 58px; border-bottom: 1px solid var(--border); display: flex; align-items: center;
  padding: 0 20px; gap: 14px; position: sticky; top: 0; background: var(--bg); z-index: 5;
}
.topbar-title { font-weight: 600; font-size: 16px; }
.topbar-right { margin-left: auto; color: var(--text-muted); font-size: 13px; }
.mobile-only { display: none; }

.content { padding: 20px; flex: 1; overflow-x: hidden; }
.view.hidden { display: none; }

/* ---------- Cards ---------- */
.cards-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; margin-bottom: 16px; }
.panels-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 16px; }
@media (max-width: 900px) { .panels-grid { grid-template-columns: 1fr; } }

.card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; margin-bottom: 14px;
}
.card h3 { margin: 0 0 12px; font-size: 14px; color: var(--text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: .03em; }
.card-header-row { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.card-header-row h3 { margin: 0; }

.stat-card { display: flex; flex-direction: column; gap: 8px; }
.stat-label { color: var(--text-muted); font-size: 12.5px; text-transform: uppercase; letter-spacing: .04em; }
.stat-value { font-size: 26px; font-weight: 700; }
.stat-sub { color: var(--text-muted); font-size: 12px; }

.progress-bar { height: 8px; background: var(--bg-elevated); border-radius: 6px; overflow: hidden; }
.progress-fill { height: 100%; background: var(--accent); border-radius: 6px; transition: width .6s ease; }
.progress-fill.accent-cpu { background: var(--accent-cpu); }
.progress-fill.accent-ram { background: var(--accent-ram); }

.kv-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 16px; }
.kv-grid .kv-item { display: flex; flex-direction: column; gap: 2px; font-size: 13px; }
.kv-grid .kv-label { color: var(--text-muted); font-size: 11.5px; text-transform: uppercase; letter-spacing: .03em; }

.simple-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.simple-list li { display: flex; justify-content: space-between; font-size: 13px; padding: 6px 0; border-bottom: 1px solid var(--border); }
.simple-list li:last-child { border-bottom: none; }
.muted { color: var(--text-muted); }

/* ---------- Files toolbar ---------- */
.breadcrumb-row { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; flex-wrap: wrap; }
.nav-buttons { display: flex; gap: 4px; }
.breadcrumb { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; font-size: 13px; color: var(--text-muted); }
.breadcrumb a { padding: 4px 8px; border-radius: 6px; }
.breadcrumb a:hover { background: var(--bg-elevated); color: var(--text); }
.breadcrumb .sep { color: var(--border); }

.toolbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 12px; flex-wrap: wrap; }
.toolbar-group { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

.dropdown { position: relative; }
.dropdown-menu {
  position: absolute; top: 110%; left: 0; background: var(--bg-elevated); border: 1px solid var(--border);
  border-radius: 8px; padding: 6px; display: none; flex-direction: column; min-width: 160px; z-index: 20; box-shadow: var(--shadow);
}
.dropdown-menu.open { display: flex; }
.dropdown-menu button { background: transparent; border: none; color: var(--text); text-align: left; padding: 8px 10px; border-radius: 6px; display: flex; gap: 8px; align-items: center; }
.dropdown-menu button:hover { background: var(--bg-card); }

.search-box { display: flex; align-items: center; background: var(--bg-elevated); border: 1px solid var(--border); border-radius: 8px; padding: 0 4px 0 10px; }
.search-box input { background: transparent; border: none; color: var(--text); padding: 8px 4px; outline: none; width: 180px; }
select#sortSelect { background: var(--bg-elevated); color: var(--text); border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px; }

.selection-bar {
  display: flex; align-items: center; justify-content: space-between; background: rgba(79,140,255,0.1);
  border: 1px solid rgba(79,140,255,0.3); padding: 10px 14px; border-radius: 8px; margin-bottom: 12px; font-size: 13px;
}
.selection-bar.hidden { display: none; }
.selection-actions { display: flex; gap: 8px; }

/* ---------- File table / grid ---------- */
.file-area { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.file-table { width: 100%; border-collapse: collapse; }
.file-table th, .file-table td { text-align: left; padding: 10px 14px; font-size: 13px; border-bottom: 1px solid var(--border); }
.file-table th { color: var(--text-muted); font-weight: 600; font-size: 11.5px; text-transform: uppercase; letter-spacing: .03em; }
.file-table tbody tr:hover { background: var(--bg-elevated); }
.file-table.hidden { display: none; }
.col-check { width: 32px; }
.file-name-cell { display: flex; align-items: center; gap: 8px; cursor: pointer; }
.row-actions { display: flex; gap: 4px; opacity: 0; transition: opacity .12s; }
.file-table tbody tr:hover .row-actions { opacity: 1; }

.file-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); gap: 4px; padding: 14px; }
.file-grid.hidden { display: none; }
.grid-item { display: flex; flex-direction: column; align-items: center; gap: 6px; padding: 12px 6px; border-radius: 8px; cursor: pointer; text-align: center; }
.grid-item:hover { background: var(--bg-elevated); }
.grid-item.selected { background: rgba(79,140,255,0.15); outline: 1px solid var(--accent); }
.grid-item .name { font-size: 12px; word-break: break-word; line-height: 1.3; max-height: 2.6em; overflow: hidden; }
.file-table tbody tr.selected { background: rgba(79,140,255,0.1); }

.empty-state, .loading-state { padding: 40px; text-align: center; color: var(--text-muted); }
.empty-state.hidden, .loading-state.hidden { display: none; }

.pagination { display: flex; justify-content: center; gap: 6px; margin-top: 12px; }
.pagination button { background: var(--bg-elevated); border: 1px solid var(--border); color: var(--text); padding: 6px 12px; border-radius: 6px; }
.pagination button.active { background: var(--accent); border-color: var(--accent); color: white; }

/* ---------- Uploads ---------- */
#uploadProgressArea { display: flex; flex-direction: column; gap: 8px; margin-bottom: 10px; }
.upload-item { background: var(--bg-card); border: 1px solid var(--border); border-radius: 8px; padding: 10px 14px; }
.upload-item .upload-head { display: flex; justify-content: space-between; font-size: 12.5px; margin-bottom: 6px; }
.upload-item .progress-bar { height: 6px; }

/* ---------- Modals ---------- */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.55); display: flex; align-items: center; justify-content: center;
  z-index: 100; padding: 20px;
}
.modal-overlay.hidden { display: none; }
.modal {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  width: 100%; max-width: 560px; max-height: 86vh; overflow-y: auto; padding: 22px; box-shadow: var(--shadow);
}
.modal h2 { margin-top: 0; font-size: 17px; }
.modal.modal-lg { max-width: 900px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 18px; }
.form-group { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.form-group label { font-size: 12.5px; color: var(--text-muted); }
.form-group input, .form-group select, .form-group textarea {
  background: var(--bg-elevated); border: 1px solid var(--border); color: var(--text); padding: 9px 10px; border-radius: 8px; outline: none;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--accent); }
.perm-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 12px 0; }
.perm-col { background: var(--bg-elevated); border-radius: 8px; padding: 10px; }
.perm-col h4 { margin: 0 0 8px; font-size: 12px; color: var(--text-muted); }
.perm-col label { display: flex; align-items: center; gap: 6px; font-size: 13px; padding: 3px 0; }
.numeric-perm { font-size: 20px; font-weight: 700; text-align: center; letter-spacing: 4px; margin: 10px 0; }

/* Editor modal */
.editor-toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
#editorContainer { height: 60vh; border-radius: 8px; overflow: hidden; border: 1px solid var(--border); }

/* Preview modal */
.preview-body { display: flex; align-items: center; justify-content: center; max-height: 70vh; overflow: auto; }
.preview-body img, .preview-body video { max-width: 100%; max-height: 65vh; border-radius: 8px; }
.preview-body pre { white-space: pre-wrap; word-break: break-word; font-size: 12.5px; text-align: left; width: 100%; }

/* Context menu */
.context-menu {
  position: fixed; background: var(--bg-elevated); border: 1px solid var(--border); border-radius: 8px;
  padding: 6px; z-index: 200; min-width: 180px; box-shadow: var(--shadow); display: none;
}
.context-menu.open { display: block; }
.context-menu button { display: flex; align-items: center; gap: 8px; width: 100%; background: transparent; border: none; color: var(--text); padding: 8px 10px; border-radius: 6px; text-align: left; font-size: 13px; }
.context-menu button:hover { background: var(--bg-card); }
.context-menu button.danger { color: #fca5a5; }
.context-menu hr { border: none; border-top: 1px solid var(--border); margin: 4px 0; }

/* Toasts */
.toast-container { position: fixed; bottom: 20px; right: 20px; display: flex; flex-direction: column; gap: 10px; z-index: 300; }
.toast {
  background: var(--bg-elevated); border: 1px solid var(--border); border-left: 4px solid var(--accent);
  padding: 12px 16px; border-radius: 8px; box-shadow: var(--shadow); font-size: 13px; min-width: 220px; max-width: 320px;
  animation: toast-in .2s ease;
}
.toast.success { border-left-color: var(--accent-2); }
.toast.error { border-left-color: var(--accent-danger); }
.toast.warn { border-left-color: var(--accent-warn); }
@keyframes toast-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

.settings-form { display: flex; flex-direction: column; gap: 14px; max-width: 480px; }
.settings-form label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--text-muted); }
.settings-form input { background: var(--bg-elevated); border: 1px solid var(--border); color: var(--text); padding: 9px 10px; border-radius: 8px; }
.settings-form input:disabled { opacity: .55; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .sidebar { position: fixed; left: -240px; z-index: 50; transition: left .2s ease; box-shadow: var(--shadow); }
  .sidebar.open { left: 0; }
  .mobile-only { display: inline-flex; }
  .cards-grid { grid-template-columns: repeat(2, 1fr); }
  .file-table thead { display: none; }
  .file-table, .file-table tbody, .file-table tr, .file-table td { display: block; width: 100%; }
  .file-table tr { border-bottom: 1px solid var(--border); padding: 8px 0; }
  .search-box input { width: 120px; }
}