:root {
    --primary: #A855F7;
    --primary-dark: #7C3AED;
    --primary-light: #C084FC;
    --bg-main: #020617;
    --bg-card: #0F172A;
    --bg-hover: #1E293B;
    --bg-input: #0F172A;
    --text-primary: #F8FAFC;
    --text-secondary: #94A3B8;
    --border: #1E293B;
    --border-focus: #A855F7;
    --success: #22C55E;
    --error: #EF4444;
    --warning: #F59E0B;
    --sidebar-w: 220px;
    --radius: 8px;
    --radius-lg: 12px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-main); color: var(--text-primary); line-height: 1.5; overflow: hidden;
}
a { color: var(--primary); text-decoration: none; }

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--bg-hover); border-radius: 3px; }

/* LOGIN */
#login-screen { display: flex; align-items: center; justify-content: center; height: 100vh; }
.login-card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius-lg); padding: 40px; width: 380px;
    box-shadow: 0 25px 50px -12px rgba(0,0,0,.5);
}
.login-card h1 { text-align: center; font-size: 24px; font-weight: 700; margin-bottom: 8px; color: var(--primary); }
.login-card p { text-align: center; color: var(--text-secondary); margin-bottom: 28px; font-size: 14px; }
.login-card .error-msg { color: var(--error); font-size: 13px; text-align: center; margin-top: 12px; min-height: 20px; }

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

/* SIDEBAR */
#sidebar {
    width: var(--sidebar-w); min-width: var(--sidebar-w);
    background: var(--bg-card); border-right: 1px solid var(--border);
    display: flex; flex-direction: column; overflow-y: auto;
}
.sidebar-header { padding: 20px 16px; border-bottom: 1px solid var(--border); }
.sidebar-header h2 { font-size: 18px; font-weight: 700; color: var(--primary); }
.sidebar-header span { font-size: 12px; color: var(--text-secondary); display: block; margin-top: 2px; }
.sidebar-nav { flex: 1; padding: 8px; }
.nav-item {
    display: flex; align-items: center; gap: 10px; padding: 10px 12px;
    border-radius: var(--radius); cursor: pointer; font-size: 14px;
    color: var(--text-secondary); transition: all .15s; margin-bottom: 2px;
}
.nav-item:hover { background: var(--bg-hover); color: var(--text-primary); }
.nav-item.active { background: var(--primary-dark); color: #fff; }
.nav-item .icon { font-size: 16px; width: 24px; text-align: center; }
.sidebar-footer { padding: 16px; border-top: 1px solid var(--border); }

/* MAIN */
#main-content { flex: 1; overflow-y: auto; }
.section { display: none; }
.section.active { display: block; }
.section-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 20px 28px; border-bottom: 1px solid var(--border);
    position: sticky; top: 0; background: var(--bg-main); z-index: 5;
}
.section-header h2 { font-size: 20px; font-weight: 700; }
.section-body { padding: 24px 28px; }

/* FORMS */
.form-group { margin-bottom: 14px; }
.form-group label { display: block; font-size: 13px; font-weight: 500; color: var(--text-secondary); margin-bottom: 4px; }
.form-group input, .form-group select, .form-group textarea {
    width: 100%; padding: 9px 12px; background: var(--bg-input);
    border: 1px solid var(--border); border-radius: var(--radius);
    color: var(--text-primary); font-size: 14px; font-family: inherit;
    transition: border-color .15s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none; border-color: var(--border-focus);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; }

/* BUTTONS */
.btn {
    display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px;
    border: none; border-radius: var(--radius); font-size: 13px; font-weight: 500;
    cursor: pointer; transition: all .15s; font-family: inherit;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary { background: var(--bg-hover); color: var(--text-primary); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--border); }
.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-danger { background: var(--error); color: #fff; }
.btn-danger:hover { opacity: .9; }

/* CARDS */
.card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 16px; margin-bottom: 10px;
}
.form-card { background: var(--bg-card); margin-top: 16px; }

/* OVERVIEW */
.overview-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; margin-bottom: 24px; }
.stat-card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius-lg); padding: 20px; text-align: center;
}
.stat-card .stat-value { font-size: 28px; font-weight: 700; color: var(--primary); }
.stat-card .stat-label { font-size: 13px; color: var(--text-secondary); margin-top: 4px; }

/* ITEM LIST */
.item-card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 14px 16px; margin-bottom: 8px;
    display: flex; justify-content: space-between; align-items: center;
}
.item-card .item-info h4 { font-size: 14px; font-weight: 600; }
.item-card .item-info p { font-size: 12px; color: var(--text-secondary); margin-top: 2px; }
.item-card .item-actions { display: flex; gap: 6px; }

/* OPENING HOURS ROW */
.oh-row {
    display: grid; grid-template-columns: 100px 1fr 1fr 1fr auto; gap: 8px;
    align-items: center; margin-bottom: 6px; font-size: 13px;
}
.oh-row label.day { font-weight: 500; }
.oh-row input[type="time"] {
    padding: 6px 8px; background: var(--bg-input); border: 1px solid var(--border);
    border-radius: var(--radius); color: var(--text-primary); font-size: 13px;
}
.oh-row .check-wrap { display: flex; align-items: center; gap: 4px; font-size: 12px; color: var(--text-secondary); }

/* CHECKBOX GROUP */
.check-group { display: flex; flex-wrap: wrap; gap: 8px; }
.check-item { display: flex; align-items: center; gap: 4px; font-size: 13px; color: var(--text-secondary); cursor: pointer; }
.check-item input { accent-color: var(--primary); }

/* DROP ZONE */
.drop-zone {
    border: 2px dashed var(--border); border-radius: var(--radius);
    padding: 24px; text-align: center; cursor: pointer;
    color: var(--text-secondary); font-size: 13px;
    transition: border-color .15s;
}
.drop-zone:hover { border-color: var(--primary); }

/* TOAST */
#toast-container { position: fixed; top: 16px; right: 16px; z-index: 9999; display: flex; flex-direction: column; gap: 8px; }
.toast {
    padding: 10px 20px; border-radius: var(--radius); font-size: 13px; font-weight: 500;
    box-shadow: 0 4px 12px rgba(0,0,0,.3); animation: slideIn .3s;
}
.toast-success { background: var(--success); color: #fff; }
.toast-error { background: var(--error); color: #fff; }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* EMPTY STATE */
.empty-state { text-align: center; padding: 40px 20px; color: var(--text-secondary); font-size: 14px; }

.ef-mode-btn { background: var(--bg-card); border: 1px solid var(--border); color: var(--text-secondary); cursor: pointer; }
.ef-mode-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.check-group label { cursor: pointer; }

@media (max-width: 768px) {
    .app-layout { flex-direction: column; }
    #sidebar { width: 100%; min-width: 100%; flex-direction: row; overflow-x: auto; border-right: none; border-bottom: 1px solid var(--border); }
    .sidebar-header { display: none; }
    .sidebar-nav { display: flex; padding: 4px 8px; gap: 2px; }
    .nav-item { white-space: nowrap; font-size: 13px; padding: 8px 10px; }
    .sidebar-footer { display: none; }
    .section-body { padding: 16px; }
    .form-row { grid-template-columns: 1fr; }
    .oh-row { grid-template-columns: 80px 1fr 1fr auto; }
    .oh-row input[type="time"]:last-of-type { display: none; }
}