/* ===================================================
   Data Refiner Pro – Modern UI Stylesheet
   =================================================== */
:root {
  --primary:    #6366f1;
  --primary-d:  #4f46e5;
  --primary-l:  #e0e7ff;
  --success:    #10b981;
  --danger:     #ef4444;
  --warning:    #f59e0b;
  --info:       #3b82f6;
  --purple:     #8b5cf6;
  --orange:     #f97316;
  --dark:       #1e293b;
  --dark2:      #0f172a;
  --text:       #334155;
  --text-muted: #94a3b8;
  --border:     #e2e8f0;
  --bg:         #f1f5f9;
  --card-bg:    #ffffff;
  --sidebar-w:  260px;
  --navbar-h:   64px;
  --radius:     12px;
  --radius-sm:  8px;
  --shadow:     0 1px 3px rgba(0,0,0,.07), 0 4px 12px rgba(0,0,0,.04);
  --shadow-md:  0 4px 16px rgba(99,102,241,.15);
  --transition: .2s ease;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: 'Inter', 'Segoe UI', sans-serif; background: var(--bg); color: var(--text); line-height: 1.6; }
a { text-decoration: none; color: inherit; }

/* ─── Scrollbar ──────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: #f8fafc; }
::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 3px; }

/* ─── Navbar ─────────────────────────────────── */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--navbar-h);
  background: var(--dark2);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 1.5rem;
  box-shadow: 0 2px 12px rgba(0,0,0,.2);
}
.navbar-brand { display: flex; align-items: center; gap: .75rem; }
.sidebar-toggle {
  background: none; border: none; color: #94a3b8; cursor: pointer;
  font-size: 1.1rem; padding: .4rem; border-radius: 6px;
  transition: var(--transition);
}
.sidebar-toggle:hover { color: #fff; background: rgba(255,255,255,.08); }
.brand-link { display: flex; align-items: center; gap: .6rem; }
.brand-icon { color: var(--primary); font-size: 1.4rem; }
.brand-text { color: #fff; font-weight: 700; font-size: 1.1rem; letter-spacing: -.3px; }

.navbar-right { position: relative; }
.navbar-user {
  display: flex; align-items: center; gap: .5rem; cursor: pointer;
  padding: .4rem .75rem; border-radius: var(--radius-sm);
  transition: var(--transition); color: #cbd5e1;
}
.navbar-user:hover { background: rgba(255,255,255,.08); color: #fff; }
.user-avatar-sm {
  width: 32px; height: 32px; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--purple));
  display: flex; align-items: center; justify-content: center;
  font-size: .8rem; font-weight: 700; color: #fff;
}
.user-name-nav { font-size: .9rem; font-weight: 500; }

.user-dropdown {
  position: absolute; top: calc(100% + .5rem); right: 0;
  background: var(--card-bg); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: 0 8px 32px rgba(0,0,0,.12);
  min-width: 220px; overflow: hidden; z-index: 999;
  opacity: 0; visibility: hidden; transform: translateY(-8px);
  transition: all .2s ease;
}
.user-dropdown.show { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown-header { padding: .75rem 1rem; background: var(--bg); border-bottom: 1px solid var(--border); }
.dropdown-header strong { display: block; color: var(--dark); }
.dropdown-header small { color: var(--text-muted); font-size: .8rem; }
.dropdown-item {
  display: flex; align-items: center; gap: .6rem;
  padding: .6rem 1rem; color: var(--text); font-size: .9rem;
  transition: var(--transition);
}
.dropdown-item:hover { background: var(--bg); color: var(--primary); }
.dropdown-item i { width: 16px; }
.dropdown-divider { border-top: 1px solid var(--border); }
.text-danger { color: var(--danger) !important; }

/* ─── Sidebar ────────────────────────────────── */
.sidebar {
  position: fixed; top: var(--navbar-h); left: 0; bottom: 0;
  width: var(--sidebar-w); background: #1a2234;
  overflow-y: auto; z-index: 900; transition: transform .3s ease;
}
.sidebar.collapsed { transform: translateX(calc(-1 * var(--sidebar-w))); }
.sidebar-inner { padding: 1rem 0; }

.sidebar-nav { display: flex; flex-direction: column; gap: .25rem; }
.nav-section { padding: .75rem 1rem .25rem; }
.nav-label { font-size: .7rem; font-weight: 600; text-transform: uppercase; letter-spacing: .08em; color: #4a5568; }

.nav-item {
  display: flex; align-items: center; gap: .75rem;
  padding: .65rem 1.25rem; margin: .15rem .75rem;
  border-radius: var(--radius-sm); color: #94a3b8;
  font-size: .9rem; font-weight: 500; transition: var(--transition);
}
.nav-item:hover { background: rgba(255,255,255,.06); color: #e2e8f0; }
.nav-item.active { background: var(--primary); color: #fff; box-shadow: 0 2px 8px rgba(99,102,241,.35); }
.nav-item i { width: 18px; text-align: center; font-size: .95rem; }

/* ─── Main Layout ────────────────────────────── */
.main-wrapper { display: flex; padding-top: var(--navbar-h); }
.content-area {
  flex: 1; margin-left: var(--sidebar-w);
  padding: 2rem; min-height: calc(100vh - var(--navbar-h));
  transition: margin .3s ease;
}
.sidebar.collapsed ~ .content-area,
.content-area.expanded { margin-left: 0; }

/* ─── Page Header ────────────────────────────── */
.page-header {
  margin-bottom: 1.75rem;
  display: flex; align-items: flex-start; justify-content: space-between;
  flex-wrap: wrap; gap: 1rem;
}
.page-header h1 { font-size: 1.6rem; font-weight: 700; color: var(--dark); }
.page-header p { color: var(--text-muted); font-size: .95rem; margin-top: .2rem; }

/* ─── Cards ──────────────────────────────────── */
.card {
  background: var(--card-bg); border-radius: var(--radius);
  box-shadow: var(--shadow); margin-bottom: 1.5rem; overflow: hidden;
  border: 1px solid #f1f5f9;
}
.card-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.2rem 1.5rem; border-bottom: 1px solid var(--border);
  flex-wrap: wrap; gap: .75rem;
}
.card-header h2 { font-size: 1rem; font-weight: 600; color: var(--dark); }

/* ─── Stats Grid ─────────────────────────────── */
.stats-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.25rem; margin-bottom: 1.5rem;
}
.stat-card {
  background: var(--card-bg); border-radius: var(--radius);
  padding: 1.5rem; box-shadow: var(--shadow);
  display: flex; align-items: center; gap: 1rem;
  border: 1px solid #f1f5f9; transition: transform .2s, box-shadow .2s;
}
.stat-card:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,0,0,.08); }
.stat-icon {
  width: 52px; height: 52px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; flex-shrink: 0;
}
.stat-card.blue  .stat-icon { background: #eff6ff; color: var(--info); }
.stat-card.green .stat-icon { background: #ecfdf5; color: var(--success); }
.stat-card.purple .stat-icon { background: #f5f3ff; color: var(--purple); }
.stat-card.orange .stat-icon { background: #fff7ed; color: var(--orange); }
.stat-info h3 { font-size: 1.75rem; font-weight: 700; color: var(--dark); line-height: 1; }
.stat-info p { font-size: .82rem; color: var(--text-muted); margin-top: .2rem; }

/* ─── Buttons ────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: .4rem;
  padding: .55rem 1.1rem; border-radius: var(--radius-sm);
  font-size: .875rem; font-weight: 500; cursor: pointer;
  border: 1.5px solid transparent; transition: all .18s ease;
  white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-d); border-color: var(--primary-d); box-shadow: var(--shadow-md); }
.btn-success { background: var(--success); color: #fff; border-color: var(--success); }
.btn-success:hover { background: #059669; }
.btn-danger { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn-danger:hover { background: #dc2626; }
.btn-warning { background: var(--warning); color: #fff; border-color: var(--warning); }
.btn-warning:hover { background: #d97706; }
.btn-outline { background: transparent; color: var(--text); border-color: var(--border); }
.btn-outline:hover { background: var(--bg); border-color: #cbd5e1; }
.btn-block { width: 100%; justify-content: center; }
.btn-lg { padding: .75rem 1.5rem; font-size: 1rem; }
.btn-sm { padding: .35rem .7rem; font-size: .8rem; border-radius: 6px; }

/* ─── Forms ──────────────────────────────────── */
.form-group { margin-bottom: 1.25rem; padding: 0 1.5rem; }
.form-label {
  display: block; font-size: .875rem; font-weight: 500;
  color: var(--text); margin-bottom: .4rem;
}
.form-label.required::after { content: ' *'; color: var(--danger); }
.form-control {
  width: 100%; padding: .65rem .9rem; border: 1.5px solid var(--border);
  border-radius: var(--radius-sm); font-size: .9rem; color: var(--text);
  background: #fff; transition: border .18s, box-shadow .18s;
  outline: none;
}
.form-control:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-l); }
.form-hint { font-size: .8rem; color: var(--text-muted); margin-top: .3rem; display: block; }
.form-actions { padding: 1rem 1.5rem; border-top: 1px solid var(--border); display: flex; gap: .75rem; flex-wrap: wrap; }
.input-icon-right { position: relative; }
.input-icon-right .form-control { padding-right: 2.5rem; }
.toggle-pw {
  position: absolute; right: .75rem; top: 50%; transform: translateY(-50%);
  cursor: pointer; color: var(--text-muted);
}

/* ─── File Drop ──────────────────────────────── */
.file-drop-area {
  border: 2px dashed #cbd5e1; border-radius: var(--radius);
  padding: 2.5rem 1rem; text-align: center; cursor: pointer;
  transition: all .2s; background: #fafbfc; position: relative;
}
.file-drop-area:hover, .file-drop-area.drag-over {
  border-color: var(--primary); background: var(--primary-l);
}
.file-drop-area.has-file { border-color: var(--success); background: #f0fdf4; }
.file-drop-icon { font-size: 2.5rem; color: var(--text-muted); margin-bottom: .5rem; }
.file-drop-area.drag-over .file-drop-icon, .file-drop-area:hover .file-drop-icon { color: var(--primary); }
.file-drop-text strong { color: var(--text); }
.file-drop-text span { font-size: .85rem; color: var(--text-muted); }
.file-input { position: absolute; inset: 0; opacity: 0; cursor: pointer; width: 100%; }
.file-preview {
  margin-top: .75rem; display: flex; align-items: center; justify-content: center;
  gap: .5rem; color: var(--success); font-weight: 500; font-size: .9rem;
}
.file-preview i { font-size: 1.2rem; }
.hidden { display: none !important; }

/* ─── Processing Overlay ─────────────────────── */
.upload-card { position: relative; }
.processing-overlay {
  position: absolute; inset: 0; background: rgba(255,255,255,.85);
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius); z-index: 10; backdrop-filter: blur(2px);
}
.processing-box { text-align: center; }
.processing-box p { margin-top: .75rem; color: var(--text); font-weight: 500; }
.spinner {
  width: 48px; height: 48px; border: 4px solid var(--primary-l);
  border-top-color: var(--primary); border-radius: 50%; margin: 0 auto;
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ─── Table ──────────────────────────────────── */
.table-responsive { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; font-size: .88rem; }
.data-table th {
  background: #f8fafc; padding: .75rem 1rem;
  text-align: left; font-size: .78rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: .05em;
  color: var(--text-muted); border-bottom: 2px solid var(--border);
  white-space: nowrap;
}
.data-table td { padding: .8rem 1rem; border-bottom: 1px solid #f1f5f9; vertical-align: middle; }
.data-table tbody tr:hover { background: #fafbfc; }
.data-table tbody tr:last-child td { border-bottom: none; }
.actions-cell { display: flex; gap: .4rem; flex-wrap: wrap; }
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }

/* ─── Badges ─────────────────────────────────── */
.badge {
  display: inline-flex; align-items: center; padding: .2rem .6rem;
  border-radius: 20px; font-size: .75rem; font-weight: 600;
  white-space: nowrap;
}
.badge-success  { background: #d1fae5; color: #065f46; }
.badge-danger   { background: #fee2e2; color: #991b1b; }
.badge-warning  { background: #fef3c7; color: #92400e; }
.badge-info     { background: #dbeafe; color: #1e40af; }
.badge-purple   { background: #ede9fe; color: #5b21b6; }
.badge-secondary{ background: #f1f5f9; color: #475569; }
.badge-done, .badge-success { background: #d1fae5; color: #065f46; }
.badge-pending  { background: #fef3c7; color: #92400e; }

/* ─── Alerts ─────────────────────────────────── */
.alert {
  display: flex; align-items: flex-start; gap: .6rem;
  padding: .9rem 1.25rem; border-radius: var(--radius-sm);
  margin-bottom: 1.25rem; font-size: .9rem; border: 1px solid transparent;
}
.alert-success { background: #ecfdf5; color: #065f46; border-color: #a7f3d0; }
.alert-danger   { background: #fef2f2; color: #991b1b; border-color: #fca5a5; }
.alert-info     { background: #eff6ff; color: #1e40af; border-color: #bfdbfe; }
.alert i { margin-top: .1rem; flex-shrink: 0; }

/* ─── Auth Page ──────────────────────────────── */
.auth-page {
  min-height: 100vh;
  background: linear-gradient(135deg, var(--dark2) 0%, #1a2234 100%);
  display: flex; align-items: center; justify-content: center; padding: 1rem;
}
.auth-container { width: 100%; max-width: 420px; }
.auth-card {
  background: var(--card-bg); border-radius: var(--radius);
  padding: 2.5rem; box-shadow: 0 20px 60px rgba(0,0,0,.3);
}
.auth-logo { text-align: center; margin-bottom: 2rem; }
.auth-logo i { font-size: 2.5rem; color: var(--primary); }
.auth-logo h1 { font-size: 1.5rem; font-weight: 700; color: var(--dark); margin-top: .5rem; }
.auth-logo p { color: var(--text-muted); font-size: .9rem; }
.auth-card .form-group { padding: 0; margin-bottom: 1rem; }
.auth-footer { text-align: center; margin-top: 1.5rem; font-size: .82rem; color: var(--text-muted); }

/* ─── Search ─────────────────────────────────── */
.search-card .card { margin-bottom: 0; box-shadow: none; border: 1px solid var(--border); }
.search-card { margin-bottom: 1.25rem; }
.search-form { padding: 1rem 1.5rem; }
.search-group {
  display: flex; align-items: center; gap: .5rem;
  background: #f8fafc; border: 1.5px solid var(--border);
  border-radius: var(--radius-sm); padding: .4rem .75rem;
}
.search-group i { color: var(--text-muted); }
.search-group .form-control {
  border: none; background: none; box-shadow: none; padding: .3rem .4rem; flex: 1;
}
.search-group .form-control:focus { box-shadow: none; }

/* ─── User Management ────────────────────────── */
.user-info { display: flex; align-items: center; gap: .6rem; }
.user-avatar {
  width: 34px; height: 34px; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--purple));
  display: flex; align-items: center; justify-content: center;
  font-size: .8rem; font-weight: 700; color: #fff; flex-shrink: 0;
}
.status-toggle {
  display: inline-flex; align-items: center; gap: .4rem;
  padding: .3rem .75rem; border-radius: 20px; border: none; cursor: pointer;
  font-size: .78rem; font-weight: 600; transition: var(--transition);
}
.status-toggle.active { background: #d1fae5; color: #065f46; }
.status-toggle.inactive { background: #fee2e2; color: #991b1b; }
.status-toggle .dot {
  width: 7px; height: 7px; border-radius: 50%; display: inline-block;
}
.status-toggle.active .dot { background: #10b981; }
.status-toggle.inactive .dot { background: #ef4444; }

/* ─── Modals ─────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.4);
  display: flex; align-items: center; justify-content: center;
  z-index: 2000; padding: 1rem; backdrop-filter: blur(3px);
}
.modal {
  background: var(--card-bg); border-radius: var(--radius);
  width: 100%; max-width: 480px; box-shadow: 0 20px 60px rgba(0,0,0,.2);
  animation: modalIn .2s ease;
}
@keyframes modalIn { from { opacity:0; transform: scale(.95) translateY(-10px); } to { opacity:1; transform: scale(1) translateY(0); } }
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.2rem 1.5rem; border-bottom: 1px solid var(--border);
}
.modal-header h3 { font-size: 1rem; font-weight: 600; }
.modal-close { background: none; border: none; cursor: pointer; color: var(--text-muted); font-size: 1.1rem; transition: color .15s; }
.modal-close:hover { color: var(--danger); }
.modal-body { padding: 1.5rem; }
.modal-body .form-group { padding: 0; }
.modal-footer {
  display: flex; gap: .75rem; justify-content: flex-end;
  padding: 1rem 1.5rem; border-top: 1px solid var(--border);
}

/* ─── Responsive ─────────────────────────────── */
@media (max-width: 768px) {
  .sidebar { transform: translateX(calc(-1 * var(--sidebar-w))); }
  .sidebar.open { transform: translateX(0); }
  .content-area { margin-left: 0; padding: 1rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .brand-text { display: none; }
  .page-header { flex-direction: column; }
}
@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .auth-card { padding: 1.5rem; }
}