@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* ── Variables ──────────────────────────────────────────────────────────────── */
:root {
  --primary:       #2b374f;
  --primary-dark:  #1d2638;
  --primary-light: #485878;
  --accent:        #c4a453;
  --success:       #10b981;
  --warning:       #f59e0b;
  --danger:        #ef4444;
  --bg:            #f8fafc;
  --bg2:           #ffffff;
  --bg3:           #f1f5f9;
  --card:          #ffffff;
  --border:        #e2e8f0;
  --text:          #1e293b;
  --text-muted:    #64748b;
  --sidebar-w:     260px;
  --radius:        12px;
  --shadow:        0 4px 20px rgba(0,0,0,.08);
  --transition:    .22s cubic-bezier(.4,0,.2,1);
}

/* ── Reset ──────────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 15px; scroll-behavior: smooth; }
body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
}

/* ── Sidebar ────────────────────────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  background: var(--bg2);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0;
  height: 100vh;
  z-index: 200;
  transition: transform var(--transition);
  overflow-y: auto;
}
.sidebar-brand {
  display: flex; align-items: center; gap: 12px;
  padding: 22px 20px;
  border-bottom: 1px solid var(--border);
}
.sidebar-brand .brand-icon {
  width: 42px; height: 42px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; flex-shrink: 0;
}
.sidebar-brand span { font-weight: 700; font-size: 1.1rem; color: var(--text); }
.sidebar-brand small { display: block; font-size: .72rem; color: var(--text-muted); }

.sidebar-section {
  padding: 10px 12px 4px;
  font-size: .68rem; font-weight: 600;
  letter-spacing: .1em;
  color: var(--text-muted);
  text-transform: uppercase;
}
.sidebar nav a {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 20px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: .88rem; font-weight: 500;
  border-radius: var(--radius);
  margin: 2px 8px;
  transition: background var(--transition), color var(--transition);
}
.sidebar nav a:hover, .sidebar nav a.active {
  background: var(--bg3);
  color: var(--primary);
}
.sidebar nav a.active { border-left: 3px solid var(--accent); }
.sidebar nav a .nav-icon { font-size: 1.1rem; width: 22px; text-align: center; }

.sidebar-user {
  margin-top: auto;
  padding: 16px 20px;
  border-top: 1px solid var(--border);
  display: flex; align-items: center; gap: 10px;
}
.user-avatar {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: .9rem;
}
.user-info { flex: 1; overflow: hidden; }
.user-info strong { display: block; font-size: .85rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.user-info small { font-size: .72rem; color: var(--text-muted); }
.logout-btn {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 1.1rem;
  transition: color var(--transition);
}
.logout-btn:hover { color: var(--danger); }

/* ── Main Layout ────────────────────────────────────────────────────────────── */
.main-wrapper {
  margin-left: var(--sidebar-w);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
.topbar {
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  padding: 0 28px;
  height: 64px;
  display: flex; align-items: center; justify-content: space-between;
  position: sticky; top: 0; z-index: 100;
}
.topbar-title { font-size: 1.1rem; font-weight: 600; }
.topbar-actions { display: flex; align-items: center; gap: 12px; }

.content { padding: 28px; flex: 1; }

/* ── Cards ──────────────────────────────────────────────────────────────────── */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}
.card-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 20px; padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
.card-header h2 { font-size: 1rem; font-weight: 600; }

/* ── KPI Cards ──────────────────────────────────────────────────────────────── */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}
.kpi-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex; align-items: center; gap: 16px;
  transition: transform var(--transition), box-shadow var(--transition);
}
.kpi-card:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(0,0,0,.12); }
.kpi-icon {
  width: 50px; height: 50px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; flex-shrink: 0;
}
.kpi-icon.blue   { background: #6366f122; color: var(--primary); }
.kpi-icon.green  { background: #10b98122; color: var(--success); }
.kpi-icon.yellow { background: #f59e0b22; color: var(--warning); }
.kpi-icon.red    { background: #ef444422; color: var(--danger); }
.kpi-icon.cyan   { background: #06b6d422; color: var(--accent); }
.kpi-label { font-size: .75rem; color: var(--text-muted); margin-bottom: 6px; }
.kpi-value { font-size: 1.6rem; font-weight: 700; }
.kpi-sub   { font-size: .72rem; color: var(--text-muted); margin-top: 4px; }

/* ── Buttons ────────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 18px;
  border-radius: 8px;
  font-size: .86rem; font-weight: 500;
  cursor: pointer; border: none;
  text-decoration: none;
  transition: all var(--transition);
}
.btn-primary   { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); }
.btn-success   { background: var(--success); color: #fff; }
.btn-success:hover { filter: brightness(1.1); }
.btn-danger    { background: var(--danger); color: #fff; }
.btn-danger:hover { filter: brightness(1.1); }
.btn-warning   { background: var(--warning); color: #111; }
.btn-outline   { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-sm { padding: 5px 12px; font-size: .78rem; }

/* ── Tables ─────────────────────────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th {
  background: var(--primary);
  color: #fff;
  font-size: .75rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: .06em;
  padding: 12px 14px;
  text-align: left;
}
td { padding: 11px 14px; border-bottom: 1px solid var(--border); font-size: .87rem; vertical-align: middle; color: var(--text); }
tr:nth-child(even) { background-color: var(--bg3); }
tr:hover td { background-color: rgba(43, 55, 79, 0.05); }

/* ── Forms ──────────────────────────────────────────────────────────────────── */
.form-group { margin-bottom: 16px; }
label { display: block; font-size: .82rem; font-weight: 500; margin-bottom: 6px; color: var(--text-muted); }
input[type=text], input[type=number], input[type=password],
input[type=date], input[type=datetime-local],
select, textarea {
  width: 100%;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  padding: 10px 14px;
  font-size: .88rem;
  font-family: inherit;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary)33;
}
.form-row { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px,1fr)); gap: 16px; }
.form-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 20px; }

/* ── Badges ─────────────────────────────────────────────────────────────────── */
.badge {
  display: inline-block; padding: 2px 10px;
  border-radius: 999px; font-size: .72rem; font-weight: 600;
}
.badge-success { background: #10b98122; color: var(--success); }
.badge-warning { background: #f59e0b22; color: var(--warning); }
.badge-danger  { background: #ef444422; color: var(--danger); }
.badge-info    { background: #06b6d422; color: var(--accent); }
.badge-primary { background: #6366f122; color: var(--primary); }

/* ── Alerts ─────────────────────────────────────────────────────────────────── */
.alert {
  padding: 12px 16px; border-radius: 8px;
  margin-bottom: 16px; font-size: .87rem;
  display: flex; align-items: center; gap: 10px;
}
.alert-success { background: #10b98122; border: 1px solid var(--success); color: var(--success); }
.alert-danger  { background: #ef444422; border: 1px solid var(--danger);  color: var(--danger); }
.alert-warning { background: #f59e0b22; border: 1px solid var(--warning); color: var(--warning); }

/* ── POS Grid ───────────────────────────────────────────────────────────────── */
.pos-layout { display: grid; grid-template-columns: 1fr 380px; gap: 20px; }
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px,1fr));
  gap: 16px; 
  padding-right: 8px;
}
.product-tile {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 10px; padding: 14px;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
}
.product-tile:hover { border-color: var(--primary); background: var(--primary)11; transform: translateY(-2px); }
.product-tile .pt-name { font-size: .85rem; font-weight: 600; margin-bottom: 6px; }
.product-tile .pt-price { font-size: 1.05rem; color: var(--success); font-weight: 700; }
.product-tile .pt-stock { font-size: .72rem; color: var(--text-muted); margin-top: 4px; }

.cart-panel { 
  display: flex; flex-direction: column; gap: 12px; 
  position: sticky; top: 80px; height: calc(100vh - 120px);
}
.cart-items { flex: 1; overflow-y: auto; }
.cart-item {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 0; border-bottom: 1px solid var(--border);
}
.cart-item .ci-name  { flex: 1; font-size: .85rem; }
.cart-item .ci-qty   { width: 50px; text-align: center; font-weight: 600; }
.cart-item .ci-price { width: 70px; text-align: right; color: var(--success); font-weight: 600; }
.cart-item .ci-rm    { cursor: pointer; color: var(--danger); transition: transform var(--transition); }
.cart-item .ci-rm:hover { transform: scale(1.3); }
.cart-total { font-size: 1.4rem; font-weight: 700; text-align: right; color: var(--success); }

/* ── Page header ────────────────────────────────────────────────────────────── */
.page-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 22px;
}
.page-header h1 { font-size: 1.4rem; font-weight: 700; }

/* ── Search bar ─────────────────────────────────────────────────────────────── */
.search-bar { position: relative; }
.search-bar input { padding-left: 36px; }
.search-bar::before {
  content: '🔍';
  position: absolute; left: 10px; top: 50%;
  transform: translateY(-50%); font-size: .85rem;
}

/* ── Login page ─────────────────────────────────────────────────────────────── */
.login-page {
  min-height: 100vh; width: 100%;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg);
  background-image: 
    radial-gradient(at 0% 0%, rgba(196, 164, 83, 0.15) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(43, 55, 79, 0.15) 0px, transparent 50%);
}
.login-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 44px 40px;
  width: 100%; max-width: 400px;
  box-shadow: 0 10px 40px rgba(0,0,0,.1);
}
.login-logo {
  width: 120px; height: auto;
  margin: 0 auto 20px;
  display: flex; align-items: center; justify-content: center;
}
.login-logo img { width: 100%; height: auto; object-fit: contain; }
.login-card h1 { text-align: center; font-size: 1.5rem; margin-bottom: 6px; }
.login-card p  { text-align: center; color: var(--text-muted); font-size: .85rem; margin-bottom: 28px; }

/* ── Scrollbar ──────────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg2); }
::-webkit-scrollbar-thumb { background: var(--bg3); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--primary); }

/* ── Responsivo básico ──────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .main-wrapper { margin-left: 0; }
  .pos-layout { grid-template-columns: 1fr; }
  .kpi-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ── Animations ─────────────────────────────────────────────────────────────── */
@keyframes fadeIn { from { opacity:0; transform:translateY(10px); } to { opacity:1; transform:none; } }
.card, .kpi-card { animation: fadeIn .3s ease; }

/* ── Full Width POS ─────────────────────────────────────────────────────────── */
.body-pos .sidebar { display: none; }
.body-pos .main-wrapper { margin-left: 0; }
.body-pos .content { padding: 15px 28px; }

/* ── Transfer items ─────────────────────────────────────────────────────────── */
.transfer-row { display: flex; gap: 10px; align-items: center; margin-bottom: 10px; }
.transfer-row input, .transfer-row select { flex: 1; }
.remove-row { cursor: pointer; color: var(--danger); font-size: 1.3rem; }

/* ── Paginación ────────────────────────────────────────────────────────────── */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-top: 24px;
  flex-wrap: wrap;
}
.page-link {
  padding: 8px 14px;
  border-radius: 8px;
  background: var(--bg3);
  color: var(--text);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  transition: all var(--transition);
  border: 1px solid var(--border);
}
.page-link:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.page-link.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.page-link.disabled {
  opacity: 0.5;
  pointer-events: none;
}