:root {
    --bg-dark: #0f172a;
    --bg-panel: #1e293b;
    --bg-input: #0b0f19;
    --border-color: #334155;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    
    --color-indigo: #6366f1;
    --color-indigo-hover: #4f46e5;
    --color-emerald: #10b981;
    --color-amber: #f59e0b;
    --color-red: #ef4444;
    --color-red-hover: #dc2626;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    min-height: 100vh;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* --- HEADER --- */
.app-header {
    background-color: var(--bg-panel);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 1.5rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.brand-wrapper {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.brand-title { 
    font-size: 1.25rem; 
    font-weight: 700; 
    color: var(--color-indigo); 
}

.version-badge {
    font-size: 0.75rem;
    background-color: rgba(99, 102, 241, 0.15);
    color: #a5b4fc;
    padding: 0.125rem 0.5rem;
    border-radius: 4px;
    border: 1px solid rgba(99, 102, 241, 0.3);
}

.header-date { 
    font-size: 0.875rem;
    color: var(--text-muted); 
}

/* --- MAIN CONTAINER --- */
.app-container {
    max-width: 1440px;
    margin: 0 auto; 
    padding: 1rem;
}

@media (min-width: 640px) {
    .app-container {
        padding: 1.5rem;
    }
}

/* --- METRICS GRID (Top Amount Containers) --- */
.metrics-grid {
    display: grid;
    /* Adapts perfectly from 1 column on mobile to multi-columns on desktop */
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.metric-card {
    background-color: var(--bg-panel);
    padding: 1.25rem;
    border-radius: 0.75rem;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-width: 0; /* Prevents flex items from overflowing parent boundaries */
}

.metric-label { 
    font-size: 0.75rem;
    color: var(--text-muted); 
    text-transform: uppercase;
    font-weight: 600; 
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

/* Fixes overflow on large/multiple numbers: wraps safely or scales nicely */
.metric-value { 
    font-size: clamp(1.35rem, 4vw, 1.75rem); /* Dynamically shrinks slightly on smaller screens */
    font-weight: 700; 
    word-break: break-word; /* Wraps raw long numbers safely */
    overflow-wrap: break-word;
    white-space: normal; 
    line-height: 1.2;
}

.text-indigo { color: var(--color-indigo); }
.text-emerald { color: var(--color-emerald); }
.text-amber { color: var(--color-amber); }
.text-red { color: var(--color-red); }

/* --- WORKSPACE GRID --- */
.workspace-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.form-sidebar-column, .tables-main-column {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    min-width: 0; /* Keeps layout items from blowing out width calculations */
}

.form-container, .table-container {
    background-color: var(--bg-panel);
    padding: 1.25rem;
    border-radius: 0.75rem;
    border: 1px solid var(--border-color);
}

.expense-form-box {
    border-top: 4px solid var(--color-amber);
}

.section-title {
    font-size: 1.125rem; 
    font-weight: 600;
    padding-bottom: 0.5rem; 
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1rem;
}

.system-form {
    display: flex; 
    flex-direction: column;
    gap: 1rem; 
}

.form-group { 
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.form-row { 
    display: grid;
    grid-template-columns: 1fr; /* Fallback to stacked on mobile */
    gap: 0.75rem; 
}

@media (min-width: 480px) {
    .form-row {
        grid-template-columns: 1fr 1fr; /* Side-by-side on small tablet/larger */
    }
}

.form-label { 
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
}

.form-input, .search-input {
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 0.5rem 0.75rem;
    color: white;
    font-size: 0.95rem;
    outline: none;
    width: 100%;
    transition: border-color 0.15s ease;
}

.form-input:focus, .search-input:focus {
    border-color: var(--color-indigo);
}

select.form-input { 
    color-scheme: dark; 
}

/* --- BUTTONS --- */
.btn {
    width: 100%;
    padding: 0.625rem;
    border-radius: 0.5rem; 
    font-weight: 600; 
    cursor: pointer; 
    border: none; 
    transition: background 0.2s, transform 0.1s; 
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background-color: var(--color-indigo);
    color: white;
}

.btn-primary:hover { 
    background-color: var(--color-indigo-hover); 
}

.btn-expense { 
    background-color: var(--color-red); 
    color: white;
}

.btn-expense:hover { 
    background-color: var(--color-red-hover);
}

.btn-secondary { 
    background-color: var(--border-color);
    color: var(--text-main); 
    margin-top: 0.5rem;
}

/* --- TABLES & RESPONSIVENESS --- */
.table-header {
    display: flex;
    flex-direction: column; /* Stack header elements on mobile */
    align-items: flex-start;
    margin-bottom: 1rem;
    gap: 0.75rem; 
}

@media (min-width: 640px) {
    .table-header {
        flex-direction: row; /* Row display for larger screens */
        justify-content: space-between; 
        align-items: center; 
    }
    
    .table-header .search-input {
        width: 240px; /* Cap search input width when space permits */
    }
}

.table-header .section-title {
    border-bottom: none;
    margin-bottom: 0; 
    padding-bottom: 0; 
}

.table-responsive {
    overflow-x: auto; 
    width: 100%;
    -webkit-overflow-scrolling: touch; /* Smoother scrolling experience on iOS */
    border-radius: 0.5rem;
}

.max-h-table {
    max-height: 320px;
    overflow-y: auto; 
}

.inventory-table { 
    width: 100%;
    border-collapse: collapse; 
    text-align: left; 
    font-size: 0.875rem;
    white-space: nowrap; /* Prevents odd wrapping inside standard table cells */
}

/* Exception: allow description or item name columns to wrap if necessary */
.inventory-table td.wrap-cell {
    white-space: normal;
    min-width: 150px;
}

.inventory-table th {
    background-color: rgba(11, 15, 25, 0.4);
    padding: 0.75rem 1rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    font-size: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.inventory-table td { 
    padding: 0.85rem 1rem;
    border-bottom: 1px solid rgba(51, 65, 85, 0.4); 
}

.inventory-table tr:hover { 
    background-color: rgba(255, 255, 255, 0.01); 
}

.text-right { 
    text-align: right; 
}

.font-mono {
    font-family: monospace; 
    font-weight: 700; 
}

/* --- ACTION BADGES & BUTTONS --- */
.btn-action { 
    background: none;
    border: 1px solid rgba(99, 102, 241, 0.3); 
    color: #a5b4fc; 
    padding: 0.25rem 0.5rem;
    border-radius: 4px; 
    cursor: pointer; 
    font-size: 0.75rem; 
    transition: background 0.15s;
}
    
.btn-action:hover {
    background-color: rgba(99, 102, 241, 0.15);
}

.btn-delete {
    border-color: rgba(239, 68, 68, 0.3);
    color: #fca5a5; 
    margin-left: 0.25rem; 
}

.btn-delete:hover { 
    background-color: rgba(239, 68, 68, 0.15);
}

.badge {
    padding: 0.25rem 0.5rem;
    border-radius: 4px; 
    font-size: 0.725rem;
    font-weight: 700;
    border: 1px solid transparent;
    display: inline-block;
}

.badge-stable {
    background-color: rgba(16, 185, 129, 0.15); 
    color: #6ee7b7; 
    border-color: rgba(16, 185, 129, 0.3);
}

.badge-out {
    background-color: rgba(239, 68, 68, 0.15); 
    color: #fca5a5; 
    border-color: rgba(239, 68, 68, 0.3);
}

.row-out-stock {
    border-left: 4px solid var(--color-red);
}

.row-low-stock {
    border-left: 4px solid var(--color-amber);
}

/* --- ALERTS & NOTIFICATIONS --- */
.notification-banner {
    padding: 1rem; 
    border-radius: 0.5rem; 
    font-size: 0.875rem;
    font-weight: 600;
    display: flex;
    justify-content: space-between; 
    align-items: center;
    margin-bottom: 1.5rem; 
    gap: 1rem;
}

.banner-success {
    background-color: var(--color-emerald);
    color: white;
}

.banner-danger {
    background-color: var(--color-red); 
    color: white; 
}

.banner-warning {
    background-color: var(--color-amber);
    color: #0f172a;
}

.banner-info {
    background-color: var(--color-indigo);
    color: white;
}

.banner-close-btn {
    background: none; 
    border: none; 
    color: inherit;
    font-size: 1.25rem;
    cursor: pointer; 
    font-weight: 700; 
}

/* --- GENERAL UTILITIES --- */
.hidden { 
    display: none !important;
}

.empty-state {
    text-align: center;
    padding: 2rem 1.5rem;
    color: var(--text-muted); 
    font-size: 0.875rem; 
    width: 100%;
}

/* --- FX DYNAMIC ADDITIONS --- */
.fx-banner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    background-color: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    padding: 0.35rem 0.75rem;
    border-radius: 8px;
    font-size: 0.85rem;
    gap: 0.5rem;
}

.fx-label {
    color: var(--text-muted);
    font-weight: 600;
}

.fx-rate {
    color: var(--color-emerald);
    font-weight: 700;
    font-family: monospace;
}

.btn-refresh {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.85rem;
    transition: transform 0.2s;
}

.btn-refresh:hover {
    transform: rotate(45deg);
}

.converter-bar {
    background-color: var(--bg-panel);
    border-left: 4px solid var(--color-indigo);
}

/* --- LARGE SCREEN WORKSPACE ADJUSTMENT --- */
@media (min-width: 1024px) {
    .workspace-grid { 
        grid-template-columns: 380px 1fr; 
    }
}

@keyframes danger-blink {
    0%, 100% { 
        background-color: rgba(239, 68, 68, 0.15); 
        color: #fca5a5;
        border-color: rgba(239, 68, 68, 0.4);
    }
    50% {
        background-color: var(--color-red);
        color: #ffffff; 
        border-color: var(--color-red);
    }
}

.animate-danger-blink {
    animation: danger-blink 1.2s infinite; 
}