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

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --primary: #0F172A;
  --secondary: #1E293B;
  --cta: #22C55E;
  --cta-dark: #16A34A;
  --background: #020617;
  --surface: rgba(15, 23, 42, 0.85);
  --surface-strong: rgba(15, 23, 42, 0.95);
  --border: rgba(148, 163, 184, 0.35);
  --text: #F8FAFC;
  --text-muted: #94A3B8;
  --success: #22C55E;
  --info: #38BDF8;
  --danger: #ef4444;
  --warning: #fbbf24;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 20px 60px rgba(2, 6, 23, 0.75);
  --shadow-soft: 0 12px 30px rgba(15, 23, 42, 0.6);
  --shadow-lg: 0 24px 70px rgba(2, 6, 23, 0.85);
  --sidebar: 260px;
  --header: 66px;
}
html, body { height: 100%; font-family: 'Fira Sans', 'Fira Code', sans-serif; font-size: 15px; color: var(--text); background: var(--background); }
input, select, textarea, button { font-family: inherit; font-size: inherit; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
button { cursor: pointer; border: none; background: none; }

/* Login */
.login-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; background: radial-gradient(circle at 20% -10%, rgba(34, 197, 94, 0.25), transparent 45%), linear-gradient(180deg, #020617 0%, #050f1c 60%, #030713 100%); }
.login-card { background: var(--surface-strong); border-radius: 20px; padding: 48px 52px; width: min(420px, 90vw); box-shadow: var(--shadow); border: 1px solid var(--border); }
.login-card h1 { font-size: 26px; margin-bottom: 8px; color: var(--text); letter-spacing: 0.02em; }
.login-card p { color: var(--text-muted); margin-bottom: 28px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 6px; color: var(--text); text-transform: uppercase; letter-spacing: 0.08em; font-size: 12px; }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 12px 14px; border: 1px solid var(--border); border-radius: var(--radius-sm); background: rgba(15, 23, 42, 0.6); color: var(--text); outline: none; transition: border-color 0.2s, box-shadow 0.2s; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--cta); box-shadow: 0 0 0 2px rgba(34, 197, 94, 0.3); }
.form-group textarea { resize: vertical; min-height: 80px; }
.btn { padding: 12px 22px; border-radius: 999px; font-weight: 600; display: inline-flex; align-items: center; justify-content: center; gap: 8px; text-transform: uppercase; letter-spacing: 0.08em; transition: transform 0.2s, box-shadow 0.2s; }
.btn-primary { background: var(--cta); color: #020617; box-shadow: 0 10px 25px rgba(34, 197, 94, 0.35); }
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 16px 30px rgba(34, 197, 94, 0.45); }
.btn-success { background: var(--cta); color: #020617; }
.btn-success:hover { background: var(--cta-dark); }
.btn-danger { background: rgba(239, 68, 68, 0.9); color: white; }
.btn-danger:hover { background: #dc2626; }
.btn-warning { background: var(--warning); color: #0f172a; }
.btn-warning:hover { background: #f59e0b; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-outline:hover { border-color: var(--cta); }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-lg { padding: 14px 28px; font-size: 16px; }
.btn-block { width: 100%; justify-content: center; }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }

/* Layout */
.app-layout { display: flex; height: 100vh; }
.sidebar { width: var(--sidebar); background: rgba(15, 23, 42, 0.92); display: flex; flex-direction: column; position: fixed; top: 0; left: 0; bottom: 0; z-index: 100; border-right: 1px solid rgba(255,255,255,0.08); backdrop-filter: blur(16px); }
.sidebar-header { padding: 20px 24px 12px; display: flex; flex-direction: column; gap: 6px; }
.sidebar-header h2 { font-size: 20px; letter-spacing: 0.08em; color: var(--text); }
.sidebar-header span { font-size: 12px; color: var(--text-muted); letter-spacing: 0.4em; text-transform: uppercase; }
.store-badge { display: flex; align-items: center; gap: 6px; padding: 10px 18px; margin: 10px 14px; background: rgba(255,255,255,0.04); border-radius: var(--radius-sm); cursor: pointer; font-size: 13px; color: var(--text); border: 1px solid rgba(255,255,255,0.06); }
.sidebar-nav { flex: 1; overflow-y: auto; padding: 8px 12px; }
.nav-item { display: flex; align-items: center; gap: 12px; padding: 12px 14px; border-radius: var(--radius-sm); color: var(--text-muted); cursor: pointer; transition: color 0.2s, background 0.2s, transform 0.2s; font-weight: 500; margin-bottom: 4px; }
.nav-item:hover { background: rgba(255,255,255,0.04); color: var(--text); transform: translateX(2px); }
.nav-item.active { background: linear-gradient(90deg, rgba(34,197,94,0.25), rgba(34,197,94,0)); color: var(--text); box-shadow: inset 2px 0 0 rgba(34,197,94,0.75); }
.nav-item .icon { width: 20px; text-align: center; font-size: 16px; }
.nav-item .badge { margin-left: auto; background: var(--danger); color: white; font-size: 11px; padding: 2px 6px; border-radius: 10px; }
.sidebar-footer { padding: 16px 20px; border-top: 1px solid rgba(255,255,255,0.08); color: var(--text-muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.2em; }
.user-info { display: flex; align-items: center; gap: 10px; }
.user-avatar { width: 36px; height: 36px; border-radius: 50%; background: linear-gradient(135deg, rgba(34,197,94,0.3), rgba(34,197,94,0)); border: 1px solid rgba(34,197,94,0.4); color: var(--text); display: flex; align-items: center; justify-content: center; font-weight: 600; font-size: 14px; }
.user-details { flex: 1; }
.user-details .name { font-weight: 600; font-size: 14px; color: var(--text); }
.user-details .role { font-size: 12px; color: var(--text-muted); }

.main-area { margin-left: var(--sidebar); flex: 1; display: flex; flex-direction: column; background: linear-gradient(180deg, rgba(2,6,23,0.7), rgba(2,6,23,0.8)), var(--background); }
.top-bar { height: var(--header); border-bottom: 1px solid rgba(255,255,255,0.08); display: flex; align-items: center; padding: 0 32px; gap: 16px; background: rgba(2, 6, 23, 0.65); position: sticky; top: 0; z-index: 5; }
.top-bar h1 { font-size: 20px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; }
.top-bar-actions { margin-left: auto; display: flex; gap: 12px; align-items: center; }
.content { flex: 1; overflow-y: auto; padding: 32px; display: flex; flex-direction: column; gap: 24px; }

/* Cards */
.card { background: var(--surface); border-radius: var(--radius); box-shadow: var(--shadow-soft); border: 1px solid var(--border); margin-bottom: 24px; transition: transform 0.2s, border-color 0.2s; }
.card:hover { transform: translateY(-2px); border-color: rgba(34, 197, 94, 0.4); }
.card-header { padding: 18px 24px; border-bottom: none; display: flex; align-items: center; justify-content: space-between; }
.card-header h3 { font-size: 16px; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; color: var(--text); }
.card-body { padding: 20px 24px; }
.card-footer { padding: 16px 24px; border-top: 1px solid rgba(255,255,255,0.06); }

/* Stats Grid */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card { background: rgba(15, 23, 42, 0.7); border-radius: var(--radius); padding: 24px; box-shadow: 0 20px 60px rgba(2,6,23,0.7); border: 1px solid rgba(255,255,255,0.04); }
.stat-card .label { font-size: 11px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.3em; }
.stat-card .value { font-size: 34px; font-weight: 600; margin: 8px 0; color: var(--text); }
.stat-card .change { font-size: 13px; color: var(--cta); }

/* Tables */
.table-container { overflow-x: auto; border-radius: var(--radius); border: 1px solid rgba(255,255,255,0.08); background: linear-gradient(180deg, rgba(15,23,42,0.9), rgba(249, 250, 251, 0.02)); }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 12px 18px; text-align: left; border-bottom: 1px solid rgba(255,255,255,0.08); transition: background 0.2s; }
th { font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-muted); background: rgba(255,255,255,0.04); }
tr:hover td { background: rgba(255,255,255,0.03); }

/* POS Register */
.pos-layout { display: grid; grid-template-columns: 1fr 380px; gap: 16px; height: calc(100vh - var(--header) - 48px); }
.pos-items { overflow-y: auto; }
.pos-categories { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 12px; }
.category-btn { padding: 8px 18px; border-radius: 999px; border: 1px solid rgba(255,255,255,0.1); font-size: 13px; transition: all 0.2s; background: transparent; color: var(--text); }
.category-btn.active { background: rgba(34,197,94,0.18); color: var(--cta); border-color: rgba(34,197,94,0.6); }
.category-btn:hover:not(.active) { background: rgba(255,255,255,0.08); }
.items-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 8px; }
.item-btn { background: rgba(15, 23, 42, 0.75); border: 1px solid rgba(255,255,255,0.06); border-radius: var(--radius); padding: 14px; text-align: center; cursor: pointer; transition: border-color 0.2s, box-shadow 0.2s; color: var(--text); }
.item-btn:hover { border-color: rgba(34,197,94,0.6); box-shadow: 0 12px 30px rgba(2,6,23,0.55); }
.item-btn .name { font-weight: 500; margin-bottom: 4px; }
.item-btn .price { color: var(--cta); font-weight: 600; font-size: 16px; }
.item-btn .stock { font-size: 11px; color: var(--text-muted); }
.item-btn .stock.low { color: var(--danger); }

.pos-cart { background: rgba(15, 23, 42, 0.9); border-radius: var(--radius); box-shadow: var(--shadow); display: flex; flex-direction: column; border: 1px solid rgba(255,255,255,0.07); }
.cart-header { padding: 18px; border-bottom: 1px solid rgba(255,255,255,0.08); display: flex; justify-content: space-between; align-items: center; }
.cart-header h3 { font-size: 16px; font-weight: 600; color: var(--text); }
.cart-items { flex: 1; overflow-y: auto; padding: 8px; }
.cart-item { display: flex; align-items: center; gap: 8px; padding: 10px 6px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.cart-item-info { flex: 1; }
.cart-item-name { font-weight: 600; font-size: 13px; color: var(--text); }
.cart-item-price { font-size: 13px; color: var(--text-muted); }
.cart-item-qty { display: flex; align-items: center; gap: 6px; }
.cart-item-qty button { width: 28px; height: 28px; border-radius: 999px; background: rgba(255,255,255,0.06); color: var(--text); font-weight: 600; }
.cart-item-qty span { width: 32px; text-align: center; font-weight: 600; }
.cart-item-qty input { width: 46px; padding: 4px 6px; text-align: center; font-weight: 600; font-size: 13px; background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.12); border-radius: 6px; color: var(--text); }
.cart-item-remove { color: var(--danger); font-size: 18px; padding: 4px; }
.cart-totals { padding: 20px 18px; border-top: 1px solid rgba(255,255,255,0.08); }
.cart-total-row { display: flex; justify-content: space-between; padding: 4px 0; font-size: 14px; color: var(--text-muted); }
.cart-total-row.total { font-size: 22px; font-weight: 700; color: var(--text); border-top: 2px solid rgba(255,255,255,0.06); padding-top: 8px; margin-top: 6px; }
.cart-actions { padding: 12px 16px; display: flex; flex-direction: column; gap: 8px; }

/* Modals */
.modal-overlay { position: fixed; inset: 0; background: rgba(2,6,23,0.75); z-index: 1000; display: flex; align-items: center; justify-content: center; }
.modal { background: var(--surface); border-radius: var(--radius); width: 90%; max-width: 600px; max-height: 90vh; overflow-y: auto; box-shadow: var(--shadow); border: 1px solid rgba(255,255,255,0.08); }
.modal-sm { max-width: 400px; }
.modal-lg { max-width: 800px; }
.modal-header { padding: 24px 24px 0; display: flex; justify-content: space-between; align-items: center; }
.modal-header h2 { font-size: 20px; color: var(--text); }
.modal-close { font-size: 24px; color: var(--text-muted); padding: 4px; }
.modal-body { padding: 20px 24px; }
.modal-footer { padding: 16px 24px 24px; display: flex; justify-content: flex-end; gap: 12px; }

/* Toast */
.toast-container { position: fixed; top: 16px; right: 16px; z-index: 2000; display: flex; flex-direction: column; gap: 8px; }
.toast { padding: 12px 20px; border-radius: var(--radius); color: white; font-weight: 500; box-shadow: var(--shadow-lg); animation: slideIn 0.3s ease; max-width: 360px; }
.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }
.toast-info { background: var(--primary); }
.toast-warning { background: var(--warning); }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* Utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-4 { gap: 16px; }
.mb-4 { margin-bottom: 16px; }
.mt-4 { margin-top: 16px; }
.text-center { text-align: center; }
.text-sm { font-size: 13px; }
.text-muted { color: var(--text-muted); }
.font-bold { font-weight: 700; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.search-box { position: relative; }
.search-box input { padding-left: 36px; }
.search-box::before { content: ''; position: absolute; left: 12px; top: 50%; transform: translateY(-50%); width: 14px; height: 14px; border: 2px solid var(--text-muted); border-radius: 50%; }
.search-box::after { content: ''; position: absolute; left: 22px; top: 63%; width: 8px; height: 2px; background: var(--text-muted); transform: rotate(45deg); }
.pagination { display: flex; align-items: center; justify-content: center; gap: 8px; margin-top: 16px; }
.pagination button { padding: 6px 12px; border: 1px solid rgba(255,255,255,0.12); border-radius: var(--radius); background: transparent; color: var(--text); }
.pagination button:disabled { opacity: 0.4; cursor: not-allowed; }
.pagination span { color: var(--text-muted); font-size: 13px; }

/* Register Form */
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 768px) { .form-row { grid-template-columns: 1fr; } }

/* Responsive */
@media (max-width: 1024px) {
  .pos-layout { grid-template-columns: 1fr; height: auto; }
  .pos-cart { position: fixed; bottom: 0; left: var(--sidebar); right: 0; z-index: 50; border-radius: 12px 12px 0 0; max-height: 50vh; box-shadow: 0 -4px 20px rgba(0,0,0,0.15); }
  .pos-cart.collapsed { max-height: 48px; overflow: hidden; }
}