/* ═══════════════════════════════════════════════════════
   Math Files Tidy Up v2 — Design System
   Dark glassmorphism, navy + gold math palette
═══════════════════════════════════════════════════════ */

:root {
  --bg: #07080f;
  --bg-2: #0d0f1c;
  --bg-3: #0a0c18;
  --surface: rgba(255,255,255,0.04);
  --surface-hover: rgba(255,255,255,0.07);
  --surface-active: rgba(255,255,255,0.11);
  --border: rgba(255,255,255,0.08);
  --border-strong: rgba(255,255,255,0.15);

  --gold: #f5c842;
  --gold-dim: rgba(245,200,66,0.13);
  --gold-glow: rgba(245,200,66,0.4);
  --blue: #4a9eff;
  --blue-dim: rgba(74,158,255,0.13);
  --teal: #38e8c8;
  --teal-dim: rgba(56,232,200,0.12);
  --red: #ff5c5c;
  --red-dim: rgba(255,92,92,0.12);
  --green: #4cde90;
  --green-dim: rgba(76,222,144,0.12);
  --purple: #a78bfa;
  --purple-dim: rgba(167,139,250,0.12);

  --text: #f0f2fc;
  --text-2: #9ba3bc;
  --text-3: #4e5670;

  --sidebar-w: 260px;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 18px;
  --shadow: 0 8px 32px rgba(0,0,0,0.5);
  --shadow-sm: 0 3px 12px rgba(0,0,0,0.4);
  --t: 0.18s ease;
  --t-slow: 0.35s cubic-bezier(0.25,0.8,0.25,1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }
html { font-size: 15px; scroll-behavior: smooth; }
body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow: hidden;
  line-height: 1.55;
}

/* ── Background orbs ─────────────────────────────────── */
.bg-orb { position: fixed; border-radius: 50%; filter: blur(100px); pointer-events: none; z-index: 0; opacity: 0.28; }
.bg-orb-1 { width: 650px; height: 650px; background: radial-gradient(circle, rgba(74,158,255,0.5),transparent 70%); top: -180px; left: -150px; animation: drift1 20s ease-in-out infinite alternate; }
.bg-orb-2 { width: 450px; height: 450px; background: radial-gradient(circle, rgba(245,200,66,0.4),transparent 70%); bottom: -100px; right: -50px; animation: drift2 25s ease-in-out infinite alternate; }
.bg-orb-3 { width: 350px; height: 350px; background: radial-gradient(circle, rgba(56,232,200,0.3),transparent 70%); top: 50%; left: 40%; animation: drift3 22s ease-in-out infinite alternate; }
@keyframes drift1 { from{transform:translate(0,0)} to{transform:translate(60px,50px)} }
@keyframes drift2 { from{transform:translate(0,0)} to{transform:translate(-50px,-60px)} }
@keyframes drift3 { from{transform:translate(0,0)} to{transform:translate(40px,-40px)} }

/* ══════════════════════════════════════════════════════
   LOGIN SCREEN
══════════════════════════════════════════════════════ */
.login-screen {
  position: fixed; inset: 0;
  display: flex; align-items: center; justify-content: center;
  z-index: 1000;
  background: var(--bg);
}
.login-card {
  position: relative; z-index: 1;
  width: 380px;
  background: rgba(13,15,28,0.9);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow: var(--shadow), 0 0 80px rgba(74,158,255,0.08);
  padding: 2.5rem 2rem;
}
.login-logo {
  text-align: center;
  margin-bottom: 2rem;
}
.logo-symbol {
  display: block;
  font-size: 3.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--gold), var(--blue));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 16px var(--gold-glow));
  line-height: 1;
}
.login-logo h1 { font-size: 1.5rem; font-weight: 700; letter-spacing: -0.02em; margin-top: 0.5rem; }
.login-logo p { color: var(--text-3); font-size: 0.8rem; letter-spacing: 0.1em; text-transform: uppercase; }
.login-form { display: flex; flex-direction: column; gap: 1.1rem; }
.field { display: flex; flex-direction: column; gap: 0.4rem; }
.field label { font-size: 0.78rem; font-weight: 600; color: var(--text-2); text-transform: uppercase; letter-spacing: 0.06em; }
.field input, .field select, .field textarea {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  padding: 0.6rem 0.875rem;
  font-size: 0.9rem;
  font-family: inherit;
  transition: border-color var(--t), box-shadow var(--t);
  width: 100%;
  resize: vertical;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(74,158,255,0.15);
}
.field select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='7' viewBox='0 0 12 7'%3E%3Cpath fill='%239ba3bc' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2.5rem;
}
.field textarea { min-height: 60px; }
.mt { margin-top: 0.1rem; }
.req { color: var(--red); }
.login-error {
  background: var(--red-dim); border: 1px solid rgba(255,92,92,0.25);
  border-radius: var(--radius-sm); padding: 0.6rem 0.875rem;
  color: var(--red); font-size: 0.825rem;
}

/* ══════════════════════════════════════════════════════
   APP LAYOUT
══════════════════════════════════════════════════════ */
.app {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  height: 100vh;
  overflow: hidden;
  position: relative; z-index: 1;
}
.app.sidebar-collapsed { grid-template-columns: 52px 1fr; }

/* ── Sidebar ─────────────────────────────────────────── */
.sidebar {
  display: flex; flex-direction: column;
  background: rgba(10,12,24,0.9);
  border-right: 1px solid var(--border);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  overflow: hidden;
  transition: width var(--t-slow);
  position: relative; z-index: 10;
}
.sidebar-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem 0.875rem 0.875rem;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.logo-small { display: flex; align-items: center; gap: 0.6rem; }
.logo-symbol-sm {
  font-size: 1.4rem; font-weight: 800;
  background: linear-gradient(135deg, var(--gold), var(--blue));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 8px var(--gold-glow));
}
.logo-text-sm { font-size: 0.875rem; font-weight: 700; white-space: nowrap; }
.sidebar-section-label {
  font-size: 0.65rem; font-weight: 700; color: var(--text-3);
  letter-spacing: 0.1em; padding: 0.875rem 1rem 0.4rem;
  flex-shrink: 0;
}
.section-tree { flex: 1; overflow-y: auto; padding: 0 0.5rem 0.5rem; }
.tree-loading { color: var(--text-3); font-size: 0.825rem; padding: 1rem; }

/* Tree nodes */
.tree-node { margin-bottom: 1px; }
.tree-node-row {
  display: flex; align-items: center;
  gap: 0.25rem;
  padding: 0.45rem 0.5rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--t);
  position: relative;
}
.tree-node-row:hover { background: var(--surface-hover); }
.tree-node-row.active { background: var(--blue-dim); }
.tree-node-row.active .tree-name { color: var(--blue); font-weight: 600; }
.tree-toggle {
  width: 16px; height: 16px; flex-shrink: 0;
  border: none; background: transparent; color: var(--text-3);
  font-size: 0.7rem; cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: transform var(--t);
}
.tree-toggle.open { transform: rotate(90deg); }
.tree-icon { font-size: 0.9rem; flex-shrink: 0; }
.tree-name { font-size: 0.83rem; flex: 1; color: var(--text-2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.tree-actions { display: none; gap: 2px; flex-shrink: 0; }
.tree-node-row:hover .tree-actions { display: flex; }
.tree-action-btn {
  width: 20px; height: 20px; border: none; border-radius: 4px;
  background: transparent; color: var(--text-3); font-size: 0.7rem;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: all var(--t);
}
.tree-action-btn:hover { background: var(--surface-active); color: var(--text); }
.tree-action-btn.danger:hover { background: var(--red-dim); color: var(--red); }
.tree-children { padding-left: 1.2rem; }

.btn-add-root {
  margin: 0.5rem 0.875rem;
  padding: 0.5rem;
  width: calc(100% - 1.75rem);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-3);
  font-size: 0.8rem;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--t);
  flex-shrink: 0;
  text-align: center;
}
.btn-add-root:hover { background: var(--surface-hover); color: var(--text); border-color: var(--blue); }

.sidebar-footer {
  padding: 0.75rem 0.875rem;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}
.user-row { display: flex; align-items: center; gap: 0.5rem; }
.user-avatar { font-size: 1rem; }
.user-name { font-size: 0.8rem; color: var(--text-2); flex: 1; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ── Main Panel ──────────────────────────────────────── */
.main-panel {
  display: flex; flex-direction: column;
  height: 100vh;
  overflow: hidden;
  position: relative; z-index: 1;
}
.topbar {
  display: flex; align-items: center; gap: 1rem;
  padding: 0.75rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background: rgba(7,8,15,0.6);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  flex-shrink: 0;
}
.breadcrumb { display: flex; align-items: center; gap: 0.35rem; flex: 1; flex-wrap: wrap; }
.breadcrumb-item, .breadcrumb-home {
  font-size: 0.8rem; color: var(--text-3); cursor: pointer;
  transition: color var(--t); white-space: nowrap;
}
.breadcrumb-item:hover, .breadcrumb-home:hover { color: var(--text); }
.breadcrumb-sep { color: var(--text-3); font-size: 0.7rem; }
.breadcrumb-current { font-size: 0.8rem; color: var(--text-2); font-weight: 600; white-space: nowrap; }
.spacer { flex: 1; }

/* Top tabs */
.top-tabs { display: flex; gap: 0.25rem; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 0.25rem; flex-shrink: 0; }
.top-tab { padding: 0.4rem 0.875rem; border: none; border-radius: 7px; background: transparent; color: var(--text-2); font-size: 0.8rem; font-family: inherit; font-weight: 500; cursor: pointer; transition: all var(--t); white-space: nowrap; }
.top-tab:hover { color: var(--text); background: var(--surface-hover); }
.top-tab.active { background: linear-gradient(135deg, rgba(74,158,255,0.2), rgba(245,200,66,0.1)); color: var(--text); }

/* Views */
.view { display: none; flex: 1; overflow-y: auto; padding: 1.5rem; }
.view.active { display: flex; flex-direction: column; gap: 1rem; }

/* ── Files View ──────────────────────────────────────── */
.upload-bar-row { display: flex; align-items: center; gap: 0.75rem; flex-wrap: wrap; }
.search-input {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm);
  color: var(--text); padding: 0.45rem 0.875rem; font-size: 0.825rem; font-family: inherit;
  width: 200px; transition: all var(--t);
}
.search-input:focus { outline: none; border-color: var(--blue); width: 260px; }

/* Document grid */
.doc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
}
.doc-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem;
  transition: all var(--t);
  cursor: default;
  display: flex; flex-direction: column; gap: 0.5rem;
  position: relative;
  overflow: hidden;
}
.doc-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--blue), var(--teal));
  opacity: 0;
  transition: opacity var(--t);
}
.doc-card:hover { border-color: var(--border-strong); transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.doc-card:hover::before { opacity: 1; }
.doc-card-icon { font-size: 1.8rem; line-height: 1; }
.doc-card-name { font-size: 0.875rem; font-weight: 600; color: var(--text); line-height: 1.3; }
.doc-card-meta { font-size: 0.72rem; color: var(--text-3); }
.doc-card-notes { font-size: 0.75rem; color: var(--text-2); font-style: italic; border-top: 1px solid var(--border); padding-top: 0.4rem; margin-top: 0.2rem; }
.doc-card-actions { display: flex; gap: 0.4rem; margin-top: auto; padding-top: 0.5rem; border-top: 1px solid var(--border); }

/* ── Tools View ──────────────────────────────────────── */
.tools-tabs { display: flex; gap: 0.25rem; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 0.3rem; margin-bottom: 1rem; width: fit-content; flex-shrink: 0; }
.tool-tab { padding: 0.45rem 1rem; border: none; border-radius: var(--radius-sm); background: transparent; color: var(--text-2); font-size: 0.825rem; font-family: inherit; font-weight: 500; cursor: pointer; transition: all var(--t); }
.tool-tab:hover { color: var(--text); background: var(--surface-hover); }
.tool-tab.active { background: linear-gradient(135deg, rgba(74,158,255,0.2), rgba(245,200,66,0.1)); color: var(--text); }
.tool-panel { display: none; flex-direction: column; gap: 1rem; }
.tool-panel.active { display: flex; }

/* ── Cards ───────────────────────────────────────────── */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); box-shadow: var(--shadow); overflow: hidden; }
.card-header { display: flex; align-items: center; justify-content: space-between; padding: 1rem 1.25rem; border-bottom: 1px solid var(--border); }
.card-header h2 { font-size: 0.75rem; font-weight: 600; color: var(--text-3); letter-spacing: 0.08em; text-transform: uppercase; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 900px) { .two-col { grid-template-columns: 1fr; } }

/* File list in tool panels */
.file-list { padding: 0.4rem; }
.file-list.compact { max-height: 280px; overflow-y: auto; }
.file-item { display: flex; align-items: center; gap: 0.7rem; padding: 0.7rem 0.875rem; border-radius: var(--radius-sm); border: 1px solid transparent; transition: all var(--t); cursor: pointer; margin-bottom: 0.2rem; }
.file-item:hover { background: var(--surface-hover); border-color: var(--border); }
.file-item.selected { background: var(--blue-dim); border-color: var(--blue); }
.file-icon { font-size: 1.3rem; flex-shrink: 0; }
.file-info { flex: 1; min-width: 0; }
.file-name { font-size: 0.83rem; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.file-meta { font-size: 0.7rem; color: var(--text-3); margin-top: 0.1rem; }

/* Settings */
.settings-grid { padding: 1.1rem 1.25rem; display: flex; flex-direction: column; gap: 1.1rem; }
.setting-row { display: flex; flex-direction: column; gap: 0.45rem; }
.setting-row label { font-size: 0.73rem; font-weight: 600; color: var(--text-2); text-transform: uppercase; letter-spacing: 0.06em; }
.setting-row select { background: var(--surface-active); border: 1px solid var(--border); border-radius: var(--radius-sm); color: var(--text); padding: 0.5rem 2.5rem 0.5rem 0.875rem; font-size: 0.85rem; font-family: inherit; appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='7' viewBox='0 0 12 7'%3E%3Cpath fill='%239ba3bc' d='M1 1l5 5 5-5'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 0.75rem center; }
.info-box { background: var(--blue-dim); border: 1px solid rgba(74,158,255,0.15); border-radius: var(--radius-sm); padding: 0.8rem 0.875rem; flex-direction: row !important; align-items: flex-start; gap: 0.6rem; font-size: 0.78rem; color: var(--text-2); line-height: 1.5; }
.info-icon { color: var(--blue); font-size: 0.9rem; flex-shrink: 0; margin-top: 0.1rem; }
.action-area { padding: 0 1.25rem 1.25rem; }

/* Toggle group */
.toggle-group { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.toggle-btn { padding: 0.4rem 0.875rem; border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--surface); color: var(--text-2); font-size: 0.78rem; font-family: inherit; font-weight: 500; cursor: pointer; transition: all var(--t); }
.toggle-btn:hover { border-color: var(--border-strong); color: var(--text); }
.toggle-btn.active { background: var(--blue-dim); border-color: var(--blue); color: var(--blue); }

/* Job status */
.job-status { margin: 0 1.25rem 1.25rem; padding: 0.875rem 1.1rem; border-radius: var(--radius-sm); border: 1px solid var(--border); font-size: 0.825rem; }
.job-status.running { background: var(--blue-dim); border-color: rgba(74,158,255,0.25); }
.job-status.done { background: var(--green-dim); border-color: rgba(76,222,144,0.25); color: var(--green); }
.job-status.error { background: var(--red-dim); border-color: rgba(255,92,92,0.25); color: var(--red); }
.job-status-title { font-weight: 600; margin-bottom: 0.25rem; }
.spinner { display: inline-block; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Editor */
.editor-file-row { padding: 1rem 1.25rem; display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }
.editor-file-select { display: flex; align-items: center; gap: 0.6rem; flex-shrink: 0; }
.editor-file-select label { font-size: 0.8rem; font-weight: 600; color: var(--text-2); white-space: nowrap; }
.editor-file-select select { background: var(--surface-active); border: 1px solid var(--border); border-radius: var(--radius-sm); color: var(--text); padding: 0.45rem 2.5rem 0.45rem 0.75rem; font-size: 0.825rem; font-family: inherit; appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='7' viewBox='0 0 12 7'%3E%3Cpath fill='%239ba3bc' d='M1 1l5 5 5-5'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 0.75rem center; min-width: 180px; }
.editor-toolbar { display: flex; gap: 0.4rem; flex-wrap: wrap; margin-left: auto; }
.pages-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 0.875rem; }
.page-card { background: var(--surface); border: 2px solid var(--border); border-radius: var(--radius); overflow: hidden; cursor: pointer; transition: all var(--t); position: relative; }
.page-card:hover { border-color: var(--border-strong); transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.page-card.selected { border-color: var(--blue); box-shadow: 0 0 0 3px var(--blue-dim), var(--shadow-sm); }
.page-thumb { width: 100%; aspect-ratio: 210/297; object-fit: contain; background: #fff; display: block; }
.page-card-footer { display: flex; align-items: center; justify-content: space-between; padding: 0.4rem 0.6rem; font-size: 0.7rem; color: var(--text-3); background: var(--bg-2); }
.page-checkbox { position: absolute; top: 0.4rem; left: 0.4rem; width: 18px; height: 18px; border: 2px solid var(--border-strong); border-radius: 4px; background: rgba(7,8,15,0.8); display: flex; align-items: center; justify-content: center; font-size: 0.7rem; transition: all var(--t); }
.page-card.selected .page-checkbox { background: var(--blue); border-color: var(--blue); color: #fff; }

/* OCR */
.ocr-preview { padding: 1.25rem; font-family: 'JetBrains Mono', monospace; font-size: 0.75rem; line-height: 1.9; color: var(--text-2); white-space: pre-wrap; word-break: break-word; max-height: 400px; overflow-y: auto; }
.result-box { background: var(--green-dim); border: 1px solid rgba(76,222,144,0.25); border-radius: var(--radius); padding: 1rem 1.25rem; color: var(--green); font-size: 0.825rem; }
.result-box strong { display: block; margin-bottom: 0.3rem; }

/* ── Buttons ─────────────────────────────────────────── */
.btn { display: inline-flex; align-items: center; gap: 0.45rem; padding: 0.55rem 1.1rem; border: none; border-radius: var(--radius-sm); font-family: inherit; font-size: 0.825rem; font-weight: 600; cursor: pointer; transition: all var(--t); white-space: nowrap; text-decoration: none; }
.btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none !important; }
.btn-primary { background: linear-gradient(135deg, var(--blue), #2563eb); color: #fff; box-shadow: 0 3px 12px rgba(74,158,255,0.3); }
.btn-primary:hover:not(:disabled) { transform: translateY(-1px); box-shadow: 0 5px 18px rgba(74,158,255,0.45); }
.btn-secondary { background: var(--surface-hover); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover:not(:disabled) { background: var(--surface-active); }
.btn-danger { background: linear-gradient(135deg, var(--red), #c0392b); color: #fff; box-shadow: 0 3px 12px rgba(255,92,92,0.25); }
.btn-danger:hover:not(:disabled) { transform: translateY(-1px); box-shadow: 0 5px 18px rgba(255,92,92,0.4); }
.btn-ghost { background: transparent; color: var(--text-2); }
.btn-ghost:hover:not(:disabled) { background: var(--surface-hover); color: var(--text); }
.btn-sm { padding: 0.35rem 0.75rem; font-size: 0.75rem; }
.btn-lg { padding: 0.75rem 1.5rem; font-size: 0.925rem; width: 100%; justify-content: center; }
.icon-btn { width: 28px; height: 28px; border: none; border-radius: 6px; background: transparent; color: var(--text-3); font-size: 0.825rem; cursor: pointer; display: flex; align-items: center; justify-content: center; transition: all var(--t); flex-shrink: 0; }
.icon-btn:hover { background: var(--surface-active); color: var(--text); }
.icon-btn.danger:hover { background: var(--red-dim); color: var(--red); }

/* ── Modals ──────────────────────────────────────────── */
.modal-backdrop {
  position: fixed; inset: 0; z-index: 500;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex; align-items: center; justify-content: center;
  animation: fade-in 0.2s ease;
}
@keyframes fade-in { from{opacity:0} to{opacity:1} }
.modal {
  background: rgba(13,15,28,0.97);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow), 0 0 80px rgba(0,0,0,0.5);
  width: 480px;
  max-width: calc(100vw - 2rem);
  max-height: calc(100vh - 4rem);
  display: flex; flex-direction: column;
  animation: modal-in 0.25s cubic-bezier(0.25,0.8,0.25,1);
}
.modal-sm { width: 360px; }
@keyframes modal-in { from{transform:scale(0.93);opacity:0} to{transform:scale(1);opacity:1} }
.modal-header { display: flex; align-items: center; justify-content: space-between; padding: 1.25rem 1.5rem; border-bottom: 1px solid var(--border); flex-shrink: 0; }
.modal-header h2 { font-size: 1rem; font-weight: 600; }
.modal-body { padding: 1.5rem; overflow-y: auto; display: flex; flex-direction: column; gap: 0.75rem; }
.modal-footer { display: flex; justify-content: flex-end; gap: 0.75rem; padding: 1.1rem 1.5rem; border-top: 1px solid var(--border); flex-shrink: 0; }

/* Drop zone in modal */
.drop-zone-sm {
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius); padding: 1.5rem 1rem;
  text-align: center; cursor: pointer;
  transition: all var(--t-slow);
  display: flex; flex-direction: column; align-items: center; gap: 0.5rem;
}
.drop-zone-sm:hover, .drop-zone-sm.drag-over { border-color: var(--blue); background: var(--blue-dim); }
.drop-icon-sm { font-size: 1.8rem; }

/* Upload progress */
.upload-progress-wrap { display: flex; align-items: center; gap: 0.75rem; }
.upload-bar-full { flex: 1; height: 4px; background: var(--surface-active); border-radius: 2px; overflow: hidden; }
.upload-bar-fill { height: 100%; background: linear-gradient(90deg, var(--blue), var(--teal)); border-radius: 2px; transition: width 0.2s ease; width: 0%; }

/* ── Empty state ─────────────────────────────────────── */
.empty-state { text-align: center; padding: 3rem 1rem; color: var(--text-3); }
.empty-icon { font-size: 2.5rem; display: block; margin-bottom: 0.75rem; }
.empty-state p { font-size: 0.875rem; }

/* ── Toast ───────────────────────────────────────────── */
.toast-container { position: fixed; bottom: 1.5rem; right: 1.5rem; z-index: 9999; display: flex; flex-direction: column; gap: 0.6rem; pointer-events: none; }
.toast { background: rgba(13,15,28,0.97); backdrop-filter: blur(20px); border: 1px solid var(--border-strong); border-radius: var(--radius); padding: 0.875rem 1.1rem; font-size: 0.825rem; box-shadow: var(--shadow); animation: toast-in 0.25s ease; pointer-events: auto; max-width: 320px; }
@keyframes toast-in { from{transform:translateX(100%);opacity:0} to{transform:translateX(0);opacity:1} }
.toast.success { border-left: 3px solid var(--green); }
.toast.error { border-left: 3px solid var(--red); }
.toast.info { border-left: 3px solid var(--blue); }
.toast-out { animation: toast-out 0.25s ease forwards; }
@keyframes toast-out { from{transform:translateX(0);opacity:1} to{transform:translateX(110%);opacity:0} }

/* ── Scrollbar ───────────────────────────────────────── */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-3); }

/* Admin Table */
.admin-table { width: 100%; border-collapse: collapse; text-align: left; }
.admin-table th, .admin-table td { padding: 0.75rem 1rem; border-bottom: 1px solid var(--border); }
.admin-table th { font-weight: 600; color: var(--text-2); text-transform: uppercase; font-size: 0.8rem; letter-spacing: 0.05em; }
.admin-table tbody tr:hover { background: var(--surface-hover); }
.toggle-switch { position: relative; display: inline-block; width: 40px; height: 22px; }
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.slider { position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0; background-color: rgba(255,255,255,0.1); transition: .3s; border-radius: 22px; border: 1px solid var(--border); }
.slider:before { position: absolute; content: ""; height: 16px; width: 16px; left: 2px; bottom: 2px; background-color: var(--text-2); transition: .3s; border-radius: 50%; }
input:checked + .slider { background-color: var(--primary); border-color: var(--primary); }
input:checked + .slider:before { transform: translateX(18px); background-color: #000; }