/* ============================================================================
   Inefable Billing - Admin Panel CSS
   Paleta: morado #6B3FA0 / #3C148C, teal #2ECAA8 / #00B4A0
   ============================================================================ */

@import url('https://fonts.googleapis.com/css2?family=Sora:wght@400;500;600;700&family=DM+Sans:wght@400;500;600&display=swap');

:root {
  --primary: #6B3FA0;
  --primary-dark: #3C148C;
  --accent: #2ECAA8;
  --accent-dark: #00B4A0;
  --text: #1a1a2e;
  --text-light: #555;
  --text-mute: #888;
  --bg: #f6f7fb;
  --bg-card: #fff;
  --border: #e6e6ee;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #3b82f6;
  --radius: 10px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.05);
  --shadow: 0 4px 16px rgba(60, 20, 140, .07);
  --shadow-lg: 0 12px 40px rgba(60, 20, 140, .12);
  --sidebar-w: 240px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; }
body {
  font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }

h1, h2, h3, h4 { font-family: 'Sora', sans-serif; font-weight: 600; color: var(--text); }
h1 { font-size: 24px; margin: 0 0 8px; }
h2 { font-size: 20px; margin: 0 0 12px; }
h3 { font-size: 16px; margin: 0 0 8px; }

/* ============================================================================
   LAYOUT
   ============================================================================ */
.layout { display: flex; min-height: 100vh; }

/* Sidebar */
.sidebar {
  width: var(--sidebar-w);
  background: linear-gradient(180deg, var(--primary-dark) 0%, var(--primary) 100%);
  color: #fff;
  position: fixed;
  height: 100vh;
  overflow-y: auto;
  z-index: 100;
}
.sidebar-brand {
  padding: 24px 20px;
  border-bottom: 1px solid rgba(255,255,255,.1);
}
.sidebar-brand h1 {
  font-size: 18px; color: #fff; margin: 0;
  display: flex; align-items: center; gap: 10px;
}
.sidebar-brand .logo {
  width: 36px; height: 36px; border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; color: #fff;
}
.sidebar-brand small { display:block; opacity:.7; font-size: 11px; font-weight:400; margin-top:4px; }
.sidebar-nav { padding: 16px 12px; }
.sidebar-section { font-size: 11px; text-transform: uppercase; letter-spacing: .8px; opacity: .5; padding: 16px 12px 8px; }
.sidebar-link {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; margin-bottom: 2px;
  color: rgba(255,255,255,.85); text-decoration: none;
  border-radius: 8px; font-size: 14px; font-weight: 500;
  transition: all .15s;
}
.sidebar-link:hover { background: rgba(255,255,255,.1); color: #fff; }
.sidebar-link.active { background: var(--accent); color: #fff; }
.sidebar-link svg, .sidebar-link .icon { width: 18px; height: 18px; flex-shrink: 0; }

/* Main content */
.main { flex: 1; margin-left: var(--sidebar-w); }

.topbar {
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 14px 28px;
  display: flex; align-items: center; justify-content: space-between;
  position: sticky; top: 0; z-index: 50;
}
.topbar-user { display: flex; align-items: center; gap: 12px; font-size: 14px; }
.topbar-user .avatar {
  width: 36px; height: 36px; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff; display:flex; align-items:center; justify-content:center;
  font-weight: 700; font-size: 14px;
}

.content { padding: 28px; }
.page-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 24px; flex-wrap: wrap; gap: 16px; }
.page-header h1 { margin: 0; }
.page-header .subtitle { color: var(--text-mute); font-size: 14px; margin-top: 4px; }

/* ============================================================================
   CARDS Y CONTENEDORES
   ============================================================================ */
.card {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  overflow: hidden;
  margin-bottom: 20px;
}
.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: center;
}
.card-header h3 { margin: 0; font-size: 15px; }
.card-body { padding: 20px; }
.card-table .card-body { padding: 0; }

/* Stats / KPI cards */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat {
  background: #fff; padding: 20px; border-radius: var(--radius);
  border: 1px solid var(--border); box-shadow: var(--shadow-sm);
  position: relative; overflow: hidden;
}
.stat .label { font-size: 12px; text-transform: uppercase; color: var(--text-mute); letter-spacing: .6px; }
.stat .value { font-size: 26px; font-weight: 700; color: var(--text); margin-top: 4px; font-family: 'Sora', sans-serif; }
.stat .delta { font-size: 12px; color: var(--text-mute); margin-top: 6px; }
.stat::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}
.stat.success::before { background: var(--success); }
.stat.warning::before { background: var(--warning); }
.stat.danger::before { background: var(--danger); }

/* Grid */
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 900px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }

/* ============================================================================
   TABLAS
   ============================================================================ */
.table {
  width: 100%; border-collapse: collapse; background: #fff;
}
.table th {
  text-align: left; padding: 12px 16px; font-size: 12px;
  text-transform: uppercase; letter-spacing: .5px; color: var(--text-mute);
  background: #fafafe; border-bottom: 1px solid var(--border); font-weight: 600;
}
.table td {
  padding: 14px 16px; border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.table tbody tr:hover { background: #f9fafd; }
.table tbody tr:last-child td { border-bottom: none; }
.table .num { text-align: right; font-variant-numeric: tabular-nums; }
.table .actions { text-align: right; white-space: nowrap; }

/* Empty state */
.empty {
  text-align: center; padding: 60px 20px; color: var(--text-mute);
}
.empty .icon { font-size: 48px; opacity: .3; margin-bottom: 12px; }

/* ============================================================================
   BADGES
   ============================================================================ */
.badge {
  display: inline-block; padding: 3px 10px; border-radius: 100px;
  font-size: 11px; font-weight: 600; text-transform: uppercase;
  letter-spacing: .4px;
}
.badge-success    { background: #e6f8f1; color: #0a8e5d; }
.badge-warning    { background: #fef3e0; color: #b76a00; }
.badge-danger     { background: #ffe5e5; color: #c41616; }
.badge-info       { background: #e3eeff; color: #1e57c2; }
.badge-secondary  { background: #ececf3; color: #555; }

/* ============================================================================
   FORMULARIOS
   ============================================================================ */
.form-group { margin-bottom: 18px; }
.form-row { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.form-row-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
@media (max-width: 700px) { .form-row, .form-row-3 { grid-template-columns: 1fr; } }

label {
  display: block; font-weight: 600; color: var(--text);
  margin-bottom: 6px; font-size: 13px;
}
label .required { color: var(--danger); }
label small { font-weight: 400; color: var(--text-mute); }

.form-control, input[type=text], input[type=email], input[type=password],
input[type=number], input[type=date], input[type=datetime-local],
select, textarea {
  width: 100%; padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 8px; font-size: 14px;
  font-family: inherit; background: #fff; color: var(--text);
  transition: border-color .15s, box-shadow .15s;
}
.form-control:focus, input:focus, select:focus, textarea:focus {
  outline: none; border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(107, 63, 160, .15);
}
textarea { min-height: 80px; resize: vertical; font-family: inherit; }
.help-text { font-size: 12px; color: var(--text-mute); margin-top: 4px; }

.checkbox { display: flex; align-items: center; gap: 8px; cursor: pointer; }
.checkbox input[type=checkbox] { width: 18px; height: 18px; cursor: pointer; }

/* ============================================================================
   BOTONES
   ============================================================================ */
.btn {
  display: inline-block; padding: 10px 18px;
  background: var(--primary); color: #fff;
  border: none; border-radius: 8px; cursor: pointer;
  font-family: inherit; font-size: 14px; font-weight: 600;
  text-decoration: none; transition: all .15s;
  line-height: 1; text-align: center;
}
.btn:hover { background: var(--primary-dark); color: #fff; }
.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-lg { padding: 14px 24px; font-size: 15px; }
.btn-secondary { background: #ececf3; color: var(--text); }
.btn-secondary:hover { background: #ddd; color: var(--text); }
.btn-success { background: var(--accent); }
.btn-success:hover { background: var(--accent-dark); color: #fff; }
.btn-danger { background: var(--danger); }
.btn-danger:hover { background: #c41616; color: #fff; }
.btn-outline {
  background: transparent; color: var(--primary); border: 1px solid var(--primary);
}
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-block { display: block; width: 100%; }
.btn[disabled] { opacity: .5; cursor: not-allowed; }
.btn-group { display: inline-flex; gap: 8px; flex-wrap: wrap; }

/* ============================================================================
   ALERTAS
   ============================================================================ */
.alert {
  padding: 12px 16px; border-radius: 8px; margin-bottom: 16px;
  border-left: 4px solid;
}
.alert-success { background: #e6f8f1; color: #0a8e5d; border-color: var(--accent); }
.alert-error, .alert-danger { background: #ffe5e5; color: #c41616; border-color: var(--danger); }
.alert-warning { background: #fef3e0; color: #b76a00; border-color: var(--warning); }
.alert-info { background: #e3eeff; color: #1e57c2; border-color: var(--info); }

/* ============================================================================
   TABS
   ============================================================================ */
.tabs {
  display: flex; gap: 4px;
  border-bottom: 2px solid var(--border); margin-bottom: 20px;
}
.tab {
  padding: 10px 16px; color: var(--text-mute); cursor: pointer;
  border-bottom: 2px solid transparent; margin-bottom: -2px;
  font-weight: 600; font-size: 14px; text-decoration: none;
}
.tab:hover { color: var(--primary); }
.tab.active { color: var(--primary); border-color: var(--primary); }

/* ============================================================================
   PAGINACIÓN
   ============================================================================ */
.pagination {
  display: flex; gap: 4px; justify-content: center; margin-top: 20px;
}
.pagination a, .pagination span {
  padding: 8px 12px; border-radius: 6px;
  background: #fff; border: 1px solid var(--border); color: var(--text);
}
.pagination a:hover { background: var(--primary); color: #fff; border-color: var(--primary); }
.pagination .active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ============================================================================
   UTILIDADES
   ============================================================================ */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-mute); }
.text-success { color: var(--accent-dark); }
.text-danger { color: var(--danger); }
.text-bold { font-weight: 600; }
.mt-1 { margin-top: 8px; } .mt-2 { margin-top: 16px; } .mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; } .mb-2 { margin-bottom: 16px; } .mb-3 { margin-bottom: 24px; }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-1 { gap: 8px; } .gap-2 { gap: 16px; }
.w-100 { width: 100%; }
.hidden { display: none; }

/* ============================================================================
   ITEMS DE FACTURA
   ============================================================================ */
.invoice-items { width: 100%; border-collapse: collapse; }
.invoice-items th { background: #fafafe; padding: 10px; font-size: 12px; text-transform: uppercase; }
.invoice-items td { padding: 8px; border-bottom: 1px solid var(--border); }
.invoice-items input, .invoice-items select { font-size: 13px; padding: 8px; }
.invoice-items .remove-row { background: var(--danger); color: #fff; border: none; padding: 6px 10px; border-radius: 6px; cursor: pointer; }

/* ============================================================================
   LOGIN / AUTH
   ============================================================================ */
.auth-wrap {
  min-height: 100vh;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
}
.auth-card {
  background: #fff; max-width: 420px; width: 100%;
  border-radius: 16px; box-shadow: var(--shadow-lg);
  padding: 40px; text-align: center;
}
.auth-card .brand {
  width: 64px; height: 64px; margin: 0 auto 16px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 16px; display:flex;align-items:center;justify-content:center;
  color: #fff; font-weight: 700; font-size: 28px; font-family: 'Sora';
}
.auth-card h1 { margin: 0 0 4px; font-size: 22px; }
.auth-card p { color: var(--text-mute); margin: 0 0 24px; }
.auth-card .btn { width: 100%; padding: 12px; }
.auth-card .alt {
  margin-top: 20px; padding-top: 20px; border-top: 1px solid var(--border);
  font-size: 13px; color: var(--text-mute);
}

@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); transition: transform .2s; }
  .sidebar.open { transform: translateX(0); }
  .main { margin-left: 0; }
  .content { padding: 16px; }
}