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

:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #111118;
  --bg-card: #16161f;
  --bg-glass: rgba(255,255,255,0.04);
  --border: rgba(255,255,255,0.08);
  --border-hover: rgba(255,255,255,0.16);
  --accent: #6c63ff;
  --accent-hover: #7c74ff;
  --accent-dim: rgba(108,99,255,0.15);
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --text-primary: #f0f0f8;
  --text-secondary: #8888a8;
  --text-muted: #555575;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 8px 32px rgba(0,0,0,0.4);
  --transition: all 0.2s cubic-bezier(0.4,0,0.2,1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body { height: 100%; font-family: 'Inter', sans-serif; background: var(--bg-primary); color: var(--text-primary); overflow: hidden; }

/* Scrollbar */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-hover); border-radius: 10px; }

/* APP SHELL */
#app { display: flex; height: 100vh; }
#sidebar { width: 240px; min-width: 240px; background: var(--bg-secondary); border-right: 1px solid var(--border); display: flex; flex-direction: column; padding: 24px 0; transition: var(--transition); z-index: 100; }
#main-content { flex: 1; overflow-y: auto; background: var(--bg-primary); }

/* LOGIN */
#login-page { display: flex; align-items: center; justify-content: center; height: 100vh; background: var(--bg-primary); position: relative; overflow: hidden; }
#login-page::before { content: ''; position: absolute; width: 600px; height: 600px; background: radial-gradient(circle, rgba(108,99,255,0.12) 0%, transparent 70%); top: 50%; left: 50%; transform: translate(-50%,-50%); pointer-events: none; }
.login-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 48px 40px; width: 100%; max-width: 400px; box-shadow: var(--shadow); }
.login-logo { text-align: center; margin-bottom: 32px; }
.login-logo svg { width: 48px; height: 48px; color: var(--accent); }
.login-logo h1 { font-size: 24px; font-weight: 700; margin-top: 12px; }
.login-logo p { color: var(--text-secondary); font-size: 14px; margin-top: 4px; }

/* FORMS */
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 13px; font-weight: 500; color: var(--text-secondary); margin-bottom: 8px; }
.form-control { width: 100%; background: var(--bg-glass); border: 1px solid var(--border); color: var(--text-primary); padding: 12px 16px; border-radius: var(--radius); font-size: 14px; font-family: inherit; transition: var(--transition); outline: none; }
.form-control:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-dim); }
.form-control::placeholder { color: var(--text-muted); }
select.form-control option { background: var(--bg-card); }
textarea.form-control { resize: vertical; min-height: 80px; }

/* BUTTONS */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 10px 20px; border-radius: var(--radius); font-size: 14px; font-weight: 500; cursor: pointer; border: none; transition: var(--transition); font-family: inherit; text-decoration: none; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); box-shadow: 0 4px 16px rgba(108,99,255,0.4); }
.btn-secondary { background: var(--bg-glass); border: 1px solid var(--border); color: var(--text-primary); }
.btn-secondary:hover { border-color: var(--border-hover); background: rgba(255,255,255,0.08); }
.btn-danger { background: rgba(239,68,68,0.15); border: 1px solid rgba(239,68,68,0.3); color: var(--danger); }
.btn-danger:hover { background: rgba(239,68,68,0.25); }
.btn-success { background: rgba(34,197,94,0.15); border: 1px solid rgba(34,197,94,0.3); color: var(--success); }
.btn-success:hover { background: rgba(34,197,94,0.25); }
.btn-full { width: 100%; justify-content: center; padding: 13px 20px; }
.btn-sm { padding: 7px 14px; font-size: 12px; }
.btn-icon { padding: 8px; border-radius: 8px; aspect-ratio: 1; }

/* SIDEBAR */
.sidebar-brand { padding: 0 20px 24px; border-bottom: 1px solid var(--border); margin-bottom: 16px; }
.sidebar-brand-name { font-size: 16px; font-weight: 700; }
.sidebar-brand-sub { font-size: 12px; color: var(--text-muted); margin-top: 2px; }
.sidebar-badge { background: var(--accent-dim); color: var(--accent); font-size: 10px; padding: 2px 7px; border-radius: 20px; font-weight: 600; }
.sidebar-nav { flex: 1; padding: 0 12px; }
.nav-item { display: flex; align-items: center; gap: 12px; padding: 11px 12px; border-radius: var(--radius); cursor: pointer; color: var(--text-secondary); font-size: 14px; font-weight: 500; transition: var(--transition); margin-bottom: 4px; user-select: none; }
.nav-item:hover { background: var(--bg-glass); color: var(--text-primary); }
.nav-item.active { background: var(--accent-dim); color: var(--accent); }
.nav-item svg { width: 18px; height: 18px; flex-shrink: 0; }
.sidebar-footer { padding: 16px 12px 0; border-top: 1px solid var(--border); margin-top: 16px; }
.user-info { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-radius: var(--radius); }
.user-avatar { width: 34px; height: 34px; background: var(--accent-dim); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: var(--accent); font-size: 14px; font-weight: 700; }
.user-name { font-size: 13px; font-weight: 500; }
.user-role { font-size: 11px; color: var(--text-muted); }

/* PAGES */
.page { display: none; padding: 32px; animation: fadeIn 0.3s ease; }
.page.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
.page-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 28px; }
.page-title { font-size: 22px; font-weight: 700; }
.page-sub { color: var(--text-secondary); font-size: 14px; margin-top: 4px; }

/* CARDS */
.card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 24px; }
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 28px; }
.stat-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 20px; }
.stat-card-label { font-size: 12px; color: var(--text-secondary); font-weight: 500; text-transform: uppercase; letter-spacing: 0.5px; }
.stat-card-value { font-size: 28px; font-weight: 700; margin-top: 8px; }
.stat-card-sub { font-size: 12px; color: var(--text-muted); margin-top: 4px; }
.stat-icon { width: 40px; height: 40px; border-radius: 10px; display: flex; align-items: center; justify-content: center; margin-bottom: 12px; }

/* PRODUCTS GRID */
.products-toolbar { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; flex-wrap: wrap; }
.search-wrapper { flex: 1; min-width: 220px; position: relative; }
.search-icon { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: var(--text-muted); width: 16px; height: 16px; }
.search-input { padding-left: 38px; }
.products-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; }
.product-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; transition: var(--transition); cursor: pointer; }
.product-card:hover { border-color: var(--border-hover); transform: translateY(-2px); box-shadow: var(--shadow); }
.product-card-img { width: 100%; height: 180px; object-fit: cover; background: var(--bg-secondary); display: flex; align-items: center; justify-content: center; color: var(--text-muted); }
.product-card-img img { width: 100%; height: 100%; object-fit: cover; }
.product-card-img-placeholder { display: flex; flex-direction: column; align-items: center; gap: 8px; color: var(--text-muted); font-size: 13px; height: 180px; justify-content: center; }
.product-card-body { padding: 16px; }
.product-card-category { font-size: 11px; font-weight: 600; color: var(--accent); text-transform: uppercase; letter-spacing: 0.5px; }
.product-card-title { font-size: 15px; font-weight: 600; margin-top: 4px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.product-card-price { font-size: 18px; font-weight: 700; color: var(--success); margin-top: 8px; }
.product-card-footer { display: flex; align-items: center; justify-content: space-between; margin-top: 12px; }
.stock-badge { font-size: 12px; padding: 4px 10px; border-radius: 20px; font-weight: 600; }
.stock-ok { background: rgba(34,197,94,0.12); color: var(--success); }
.stock-low { background: rgba(245,158,11,0.12); color: var(--warning); }
.stock-out { background: rgba(239,68,68,0.12); color: var(--danger); }
.status-badge { font-size: 11px; padding: 3px 8px; border-radius: 20px; font-weight: 600; }
.status-active { background: rgba(34,197,94,0.12); color: var(--success); }
.status-inactive { background: rgba(239,68,68,0.12); color: var(--danger); }

/* MODAL */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.7); backdrop-filter: blur(4px); z-index: 500; display: flex; align-items: center; justify-content: center; padding: 20px; opacity: 0; pointer-events: none; transition: var(--transition); }
.modal-overlay.open { opacity: 1; pointer-events: all; }
.modal { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); width: 100%; max-width: 560px; max-height: 90vh; overflow-y: auto; box-shadow: 0 24px 64px rgba(0,0,0,0.6); transform: translateY(20px); transition: var(--transition); }
.modal-overlay.open .modal { transform: translateY(0); }
.modal-header { display: flex; align-items: center; justify-content: space-between; padding: 24px 24px 0; }
.modal-title { font-size: 18px; font-weight: 700; }
.modal-body { padding: 20px 24px; }
.modal-footer { padding: 0 24px 24px; display: flex; gap: 10px; justify-content: flex-end; }
.btn-close { background: none; border: none; color: var(--text-secondary); cursor: pointer; padding: 4px; border-radius: 6px; display: flex; transition: var(--transition); }
.btn-close:hover { color: var(--text-primary); background: var(--bg-glass); }

/* IMAGE UPLOAD */
.img-upload-area { border: 2px dashed var(--border); border-radius: var(--radius); padding: 24px; text-align: center; cursor: pointer; transition: var(--transition); position: relative; }
.img-upload-area:hover { border-color: var(--accent); background: var(--accent-dim); }
.img-upload-area.has-image { border-style: solid; padding: 0; overflow: hidden; }
.img-upload-area.has-image img { width: 100%; height: 200px; object-fit: cover; border-radius: calc(var(--radius) - 2px); display: block; }
.img-preview-actions { position: absolute; top: 8px; right: 8px; display: flex; gap: 6px; }
.img-upload-text { color: var(--text-secondary); font-size: 13px; margin-top: 8px; }
#image-input { display: none; }
.camera-section { margin-top: 12px; }
#camera-container { border-radius: var(--radius); overflow: hidden; position: relative; display: none; }
#camera-video { width: 100%; border-radius: var(--radius); display: block; }
.camera-controls { display: flex; gap: 8px; margin-top: 10px; justify-content: center; }
#camera-canvas { display: none; }

/* REPORTS */
.report-periods { display: flex; gap: 8px; margin-bottom: 24px; flex-wrap: wrap; }
.period-btn { padding: 8px 20px; border-radius: 20px; border: 1px solid var(--border); background: transparent; color: var(--text-secondary); cursor: pointer; font-size: 13px; font-weight: 500; transition: var(--transition); font-family: inherit; }
.period-btn:hover { background: var(--bg-glass); color: var(--text-primary); }
.period-btn.active { background: var(--accent-dim); border-color: var(--accent); color: var(--accent); }
.report-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.report-table th { text-align: left; padding: 12px 16px; font-size: 12px; font-weight: 600; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.5px; border-bottom: 1px solid var(--border); }
.report-table td { padding: 12px 16px; border-bottom: 1px solid var(--border); color: var(--text-primary); }
.report-table tr:last-child td { border-bottom: none; }
.report-table tr:hover td { background: var(--bg-glass); }

/* TOAST */
#toast-container { position: fixed; top: 24px; right: 24px; z-index: 9999; display: flex; flex-direction: column; gap: 10px; }
.toast { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 18px; font-size: 14px; box-shadow: var(--shadow); display: flex; align-items: center; gap: 10px; min-width: 280px; animation: slideIn 0.3s ease; }
.toast-success { border-left: 3px solid var(--success); }
.toast-error { border-left: 3px solid var(--danger); }
.toast-info { border-left: 3px solid var(--accent); }
@keyframes slideIn { from { opacity: 0; transform: translateX(20px); } to { opacity: 1; transform: translateX(0); } }

/* EMPTY STATE */
.empty-state { text-align: center; padding: 64px 20px; color: var(--text-muted); }
.empty-state svg { width: 48px; height: 48px; margin: 0 auto 16px; opacity: 0.4; }
.empty-state h3 { font-size: 16px; color: var(--text-secondary); margin-bottom: 8px; }
.empty-state p { font-size: 13px; }

/* LOADING */
.loading { display: flex; align-items: center; justify-content: center; padding: 48px; }
.spinner { width: 32px; height: 32px; border: 3px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* RESPONSIVE */
@media (max-width: 768px) {
  #sidebar { position: fixed; left: -240px; height: 100vh; box-shadow: var(--shadow); }
  #sidebar.open { left: 0; }
  .page { padding: 20px 16px; }
  .products-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .page-header { flex-direction: column; align-items: flex-start; gap: 12px; }
}
.mobile-header { display: none; align-items: center; justify-content: space-between; padding: 16px; background: var(--bg-secondary); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 50; }
@media (max-width: 768px) { .mobile-header { display: flex; } }
.hamburger { background: none; border: none; color: var(--text-primary); cursor: pointer; padding: 6px; }
.overlay-bg { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 99; }
.overlay-bg.show { display: block; }

/* DELETE CONFIRM */
.confirm-dialog { background: var(--bg-card); border: 1px solid rgba(239,68,68,0.3); border-radius: var(--radius-lg); padding: 28px; text-align: center; max-width: 360px; }
.confirm-dialog h3 { font-size: 18px; margin-bottom: 10px; }
.confirm-dialog p { color: var(--text-secondary); font-size: 14px; margin-bottom: 20px; }