:root {
    --primary: #6366f1; --primary-dark: #4f46e5;
    --bg-body: #f8fafc; --surface: #ffffff;
    --text-main: #1e293b; --text-muted: #64748b;
    --border: #e2e8f0;
    --success: #10b981; --danger: #ef4444;
    --radius: 8px;
    --shadow-card: 0 4px 6px -1px rgba(0,0,0,0.05);
}
* { box-sizing: border-box; }

body { 
    font-family: 'Inter', sans-serif; 
    background: var(--bg-body); 
    color: var(--text-main); 
    margin: 0; 
    min-height: 100vh;
}

/* NAVBAR */
.navbar { display: flex; justify-content: space-between; padding: 1rem 2rem; background: var(--surface); border-bottom: 1px solid var(--border); align-items: center; }
.logo { font-weight: 800; font-size: 1.4rem; color: var(--text-main); display: flex; align-items: center; gap: 8px; }
.nav-controls { display: flex; gap: 20px; align-items: center; }
.app-container { max-width: 1000px; margin: 2rem auto; padding: 0 20px; }
.hidden { display: none !important; }

/* STEPS */
.step-card { background: var(--surface); padding: 2rem; border-radius: var(--radius); border: 1px solid var(--border); margin-bottom: 2rem; box-shadow: var(--shadow-card); }
.step-header { display: flex; gap: 1rem; margin-bottom: 1.5rem; }
.step-number { background: var(--text-main); color: white; width: 32px; height: 32px; border-radius: 50%; display: grid; place-items: center; font-weight: 700; flex-shrink: 0; }
.step-header h2 { margin: 0 0 5px 0; font-size: 1.25rem; }
.step-desc { margin: 0; color: var(--text-muted); font-size: 0.9rem; }
.upload-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.drop-zone { border: 2px dashed var(--border); padding: 2rem 1.5rem; text-align: center; border-radius: 12px; cursor: pointer; transition: 0.2s; background: linear-gradient(180deg, #fcfdff 0%, #f8fafc 100%); }
.drop-zone:hover, .drop-zone.active { border-color: var(--primary); background: #eef2ff; box-shadow: 0 8px 24px rgba(79, 70, 229, 0.08); }
.drop-zone.drag-over { border-color: var(--primary); background: #e0e7ff; }
.drop-zone:focus-visible { outline: 3px solid rgba(99, 102, 241, 0.35); outline-offset: 2px; }
.drop-content h3 { margin: 0; font-size: 1.05rem; letter-spacing: 0.01em; }
.drop-subtitle { margin: 6px 0 0; color: var(--text-muted); font-size: 0.82rem; }
.drop-hint { margin: 10px 0 14px; font-size: 0.82rem; color: #475569; font-weight: 500; }
.icon-lg { font-size: 2.5rem; color: #cbd5e1; margin-bottom: 15px; }
.drop-zone.active .icon-lg { color: var(--primary); }
.file-name { display: block; margin-top: 10px; font-weight: 600; color: var(--primary); font-size: 0.9rem; }
.mapping-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 15px; margin-bottom: 20px; }
.map-group label { display: block; font-size: 0.8rem; font-weight: 600; margin-bottom: 6px; color: var(--text-muted); }
select { width: 100%; padding: 10px; border: 1px solid var(--border); border-radius: 6px; font-size: 0.9rem; background: white; }

/* BUTTONS */
.btn-primary { background: var(--primary); color: white; border: none; padding: 12px 30px; border-radius: 6px; font-weight: 600; cursor: pointer; width: 100%; transition: background 0.2s; font-size: 0.95rem; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-outline { background: white; border: 1px solid var(--border); padding: 8px 16px; border-radius: 6px; cursor: pointer; font-size: 0.85rem; font-weight: 500; color: var(--text-main); }
.upload-btn { display: inline-flex; align-items: center; gap: 8px; border-color: #c7d2fe; background: #ffffff; }
.upload-btn:hover { border-color: var(--primary); color: var(--primary); }
.btn-primary-sm { background: var(--primary); color: white; border: none; padding: 8px 16px; border-radius: 6px; cursor: pointer; font-size: 0.85rem; width: 100%; }
.btn-ghost-sm { background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 0.8rem; }
.btn-ghost-sm:hover { color: var(--danger); }
.btn-ghost { background: none; border: none; color: var(--text-muted); cursor: pointer; text-decoration: none; font-size: 0.9rem; font-weight: 500;}
.btn-ghost:hover { color: var(--text-main); }

/* SAVINGS BANNER */
.savings-banner {
    background: #ecfdf5; border: 1px solid #10b981; color: #065f46;
    padding: 25px; border-radius: 8px; margin-bottom: 25px;
    font-size: 1.1rem; display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
}
.highlight-green { font-size: 2.5rem; font-weight: 800; color: #059669; margin: 5px 0; }

/* STATS GRID */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-bottom: 20px; }
.stat-card { background: white; padding: 1.5rem; border-radius: var(--radius); border: 1px solid var(--border); display: flex; gap: 15px; align-items: center; }
.stat-icon { width: 45px; height: 45px; border-radius: 10px; display: grid; place-items: center; font-size: 1.2rem; flex-shrink: 0; }
.red-bg { background: #fee2e2; color: var(--danger); }
.green-bg { background: #d1fae5; color: var(--success); }
.blue-bg { background: #e0e7ff; color: var(--primary); }
.stat-info label { display: block; font-size: 0.75rem; text-transform: uppercase; color: var(--text-muted); font-weight: 600; margin-bottom: 4px; }
.stat-info span { font-size: 1.5rem; font-weight: 700; line-height: 1; }
.stat-info small { display: inline-block; margin-top: 8px; }
.text-muted { color: var(--text-muted); }
.split-summary-grid .stat-card { min-height: 110px; }

/* DASHBOARD & TABLES */
.dashboard-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.main-tabs { display: flex; gap: 20px; border-bottom: 1px solid var(--border); margin-bottom: 20px; }
.dash-tab { background: none; border: none; padding: 10px 0; font-size: 1rem; color: var(--text-muted); cursor: pointer; position: relative; }
.dash-tab.active { color: var(--primary); font-weight: 600; }
.dash-tab.active::after { content: ''; position: absolute; bottom: -1px; left: 0; width: 100%; height: 2px; background: var(--primary); }
.dash-panel { display: none; animation: fadeIn 0.3s; }
.dash-panel.active { display: block; }
.chart-section { background: white; padding: 20px; border-radius: var(--radius); border: 1px solid var(--border); margin-bottom: 20px; }
.chart-wrapper { height: 300px; position: relative; }
.table-toolbar { display: flex; justify-content: space-between; margin-bottom: 15px; }
.filters-toolbar {
    display: grid;
    grid-template-columns: repeat(4, minmax(120px, 1fr));
    gap: 10px;
    margin-bottom: 15px;
    padding: 12px;
    background: #f8fafc;
    border: 1px solid var(--border);
    border-radius: 8px;
}
.filters-toolbar input,
.filters-toolbar select {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.85rem;
    background: white;
}
.filters-toolbar .btn-outline {
    white-space: nowrap;
}
.count-toolbar {
    grid-template-columns: repeat(4, minmax(120px, 1fr));
}
.count-input {
    width: 110px;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    text-align: right;
    font-size: 0.95rem;
}
.count-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.15);
}
.tabs-sub button { background: none; border: none; padding: 6px 12px; font-weight: 500; color: var(--text-muted); cursor: pointer; border-radius: 6px; }
.tabs-sub button.active { background: #e2e8f0; color: var(--text-main); }
.search-box { position: relative; }
.search-box input { padding: 8px 10px 8px 32px; border: 1px solid var(--border); border-radius: 6px; width: 220px; font-size: 0.9rem; }
.search-box i { position: absolute; left: 10px; top: 50%; transform: translateY(-50%); color: var(--text-muted); font-size: 0.8rem; }
.table-container { background: white; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.tab-view { display: none; }
.tab-view.active { display: block; }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th { background: #f8fafc; padding: 12px 16px; text-align: left; font-size: 0.75rem; text-transform: uppercase; color: var(--text-muted); font-weight: 600; border-bottom: 1px solid var(--border); }
td { padding: 12px 16px; border-bottom: 1px solid var(--border); }
.text-right { text-align: right; }
.text-center { text-align: center; }
.fw-500 { font-weight: 500; }
.pos-val { color: var(--danger); background: #fef2f2; padding: 2px 6px; border-radius: 4px; font-weight: 600; font-size: 0.85rem; }
.neg-val { color: var(--success); background: #ecfdf5; padding: 2px 6px; border-radius: 4px; font-weight: 600; font-size: 0.85rem; }

/* ORDERING PANEL */
.ordering-layout { display: flex; gap: 20px; min-height: 500px; }
.ordering-sidebar { width: 300px; background: white; padding: 25px; border-radius: var(--radius); border: 1px solid var(--border); }
.ordering-content { flex: 1; }
.qty-input { width: 80px; padding: 6px; border: 1px solid var(--border); border-radius: 4px; text-align: center; font-weight: 600; }
.qty-input:focus { border-color: var(--primary); outline: none; box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.1); }
#tableOrdering th { position: sticky; top: 0; z-index: 10; background: #f8fafc; }
#tableOrdering .neg-val { background: #e0e7ff; color: var(--primary); font-size: 0.75rem; padding: 4px 8px; }
#tableOrdering .pos-val { background: #fef3c7; color: #92400e; font-size: 0.75rem; padding: 4px 8px; }

/* RECIPE BUILDER */
.planner-layout { display: flex; gap: 20px; min-height: 500px; }
.planner-sidebar { width: 300px; background: white; padding: 20px; border-radius: var(--radius); border: 1px solid var(--border); display: flex; flex-direction: column; }
.planner-content { flex: 1; }
.recipe-input-group { margin-bottom: 20px; }
.autocomplete-wrapper { position: relative; }
.autocomplete-wrapper input { width: 100%; padding: 10px 10px 10px 32px; border: 1px solid var(--border); border-radius: 6px; }
.search-icon { position: absolute; left: 10px; top: 50%; transform: translateY(-50%); color: var(--text-muted); font-size: 0.8rem; }
.autocomplete-dropdown { position: absolute; top: 100%; left: 0; right: 0; background: white; border: 1px solid var(--border); border-radius: 6px; max-height: 250px; overflow-y: auto; box-shadow: 0 4px 10px rgba(0,0,0,0.1); z-index: 50; margin-top: 5px; }
.search-item { padding: 10px; border-bottom: 1px solid var(--border); cursor: pointer; transition: 0.1s; }
.search-item:hover { background: #f1f5f9; color: var(--primary); }
.si-name { font-weight: 600; font-size: 0.9rem; }
.si-price { font-size: 0.8rem; color: var(--text-muted); }
.config-panel { animation: fadeIn 0.2s; }
.config-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 15px; border-bottom: 1px solid var(--border); padding-bottom: 10px; }
.config-header h4 { margin: 0; font-size: 1rem; color: var(--primary); }
.config-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 15px; }
.conf-group label { display: block; font-size: 0.75rem; font-weight: 600; margin-bottom: 4px; color: var(--text-muted); }
.conf-group input { width: 100%; padding: 8px; border: 1px solid var(--border); border-radius: 6px; }
.conf-group small { font-size: 0.7rem; color: var(--text-muted); }
.saved-recipes-section { margin-top: 20px; border-top: 1px solid var(--border); padding-top: 15px; flex: 1; overflow-y: auto; }
.saved-recipes-section h4 { margin: 0 0 10px 0; font-size: 0.85rem; text-transform: uppercase; color: var(--text-muted); }
.saved-recipe-item { padding: 8px 10px; background: #f8fafc; border-radius: 6px; font-size: 0.9rem; margin-bottom: 5px; cursor: pointer; display: flex; justify-content: space-between; align-items: center; }
.saved-recipe-item:hover { background: #e2e8f0; }
.del-icon { color: #cbd5e1; transition: 0.2s; }
.del-icon:hover { color: var(--danger); }
.recipe-card { background: white; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.recipe-header { padding: 15px; background: #f8fafc; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; }
.recipe-title-group { flex: 1; margin-right: 20px; }
.recipe-name-input { width: 100%; padding: 8px; border: 1px solid var(--border); border-radius: 6px; font-weight: 600; }
.recipe-actions { display: flex; gap: 10px; }
.rec-item-name { font-weight: 600; font-size: 0.9rem; }
.rec-item-sub { font-size: 0.75rem; color: var(--text-muted); }
.total-row td { background: #f1f5f9; border-top: 2px solid var(--border); }
.empty-mini { text-align: center; color: var(--text-muted); font-size: 0.85rem; font-style: italic; }
#toast-container { position: fixed; bottom: 20px; right: 20px; z-index: 999; }
.toast { background: #1e293b; color: white; padding: 12px 20px; border-radius: 6px; margin-top: 10px; display: flex; align-items: center; gap: 10px; box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1); animation: slideUp 0.3s; }
.toast.error { background: var(--danger); }
.toast.success { background: var(--success); }
.mode-switch { background: #e2e8f0; padding: 4px; border-radius: 6px; display: flex; flex-wrap: wrap; }
.mode-switch input { display: none; }
.mode-switch label { padding: 6px 12px; font-size: 0.85rem; font-weight: 500; cursor: pointer; border-radius: 4px; color: var(--text-muted); transition: 0.2s; display: flex; align-items: center; gap: 6px; }
.mode-switch input:checked + label { background: white; color: var(--primary); box-shadow: 0 1px 3px rgba(0,0,0,0.1); }
@keyframes fadeIn { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: translateY(0); } }
@keyframes slideUp { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

@media (max-width: 900px) {
    .filters-toolbar {
        grid-template-columns: 1fr 1fr;
    }
    .count-toolbar {
        grid-template-columns: 1fr;
    }
    .count-input {
        width: 100%;
        min-width: 92px;
    }
    .mapping-grid {
        grid-template-columns: 1fr 1fr;
    }
}