:root {
    --primary-color: #1e40af;
    --primary-hover: #1e3a8a;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --sidebar-bg: #ffffff;
    --sidebar-text: #475569;
    --sidebar-active-bg: #eff6ff;
    --sidebar-active-text: #2563eb;
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --sidebar-width: 260px;
    --sidebar-collapsed-width: 80px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.5;
}

.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    padding: 1.5rem;
    position: fixed;
    height: 100vh;
    transition: var(--transition);
    overflow-x: hidden;
    z-index: 1000;
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
    padding: 1.5rem 0.75rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 2rem;
    text-decoration: none;
    transition: var(--transition);
    overflow: hidden;
    white-space: nowrap;
}

.sidebar.collapsed .logo span {
    display: none;
}

.sidebar.collapsed .logo {
    justify-content: center;
    gap: 0;
}

.nav-list {
    list-style: none;
}

.nav-item {
    margin-bottom: 0.5rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    text-decoration: none;
    color: var(--sidebar-text);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 0.5rem;
    transition: var(--transition);
    white-space: nowrap;
}

.sidebar.collapsed .nav-link {
    justify-content: center;
    padding: 0.75rem;
    gap: 0;
}

.sidebar.collapsed .nav-link span {
    display: none;
}

.sidebar.collapsed .nav-link ion-icon {
    font-size: 1.5rem;
}

.nav-link:hover {
    background-color: var(--sidebar-active-bg);
    color: var(--sidebar-active-text);
}

.nav-link.active {
    background-color: var(--sidebar-active-bg);
    color: var(--sidebar-active-text);
    font-weight: 600;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    width: calc(100% - var(--sidebar-width));
    padding: 2rem;
    max-width: 1400px; /* Increased for better dashboard utility */
    transition: var(--transition);
}

.main-content.sidebar-collapsed {
    margin-left: var(--sidebar-collapsed-width);
    width: calc(100% - var(--sidebar-collapsed-width));
}

.sidebar-toggle-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.25rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.25rem;
    border-radius: 0.375rem;
    transition: var(--transition);
}

.sidebar-toggle-btn:hover {
    background-color: var(--sidebar-active-bg);
    color: var(--sidebar-active-text);
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.page-title {
    font-size: 1.5rem;
    font-weight: 600;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    text-decoration: none;
}

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

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

/* Cards & Tables */
.card {
    background-color: var(--card-bg);
    border-radius: 0.75rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.table-container {
    width: 100%;
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8125rem;
}

th {
    text-align: left;
    padding: 0.75rem 1rem;
    background-color: #f8fafc;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.025em;
    border-bottom: 1px solid var(--border-color);
}

td {
    padding: 1rem;
    border-bottom: 1px solid #f1f5f9;
}

tr:hover {
    background-color: #f8fafc;
}

.status-chip {
    display: inline-flex;
    padding: 0.25rem 0.5rem;
    border-radius: 0.375rem;
    font-size: 0.75rem;
    font-weight: 500;
}

/* Form Styles */
.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

input, select, textarea {
    width: 100%;
    padding: 0.625rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 0.875rem;
    transition: all 0.2s;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* -----------------------------
 * Responsive & Mobile Styles
 * ----------------------------- */
/* Master Data & Tabs */
.master-header {
    background: white;
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-color);
    margin: -1.5rem -1.5rem 0 -1.5rem; /* Match parent padding */
}

.plant-filter-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 0;
    overflow-x: auto;
    white-space: nowrap;
}

.filter-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.plant-chip {
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    background: white;
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.8125rem;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
}

.plant-chip:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.plant-chip.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    box-shadow: 0 4px 6px -1px rgba(37, 99, 235, 0.2);
}

.master-tabs-nav {
    display: flex;
    gap: 2rem;
    border-bottom: 1px solid var(--border-color);
    margin-top: 1rem;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}
.master-tabs-nav::-webkit-scrollbar {
    display: none;
}

.master-tab-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 0;
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 500;
    position: relative;
    transition: var(--transition);
}

.master-tab-link ion-icon {
    font-size: 1.1rem;
}

.master-tab-link:hover {
    color: var(--primary-color);
}

.master-tab-link.active {
    color: var(--primary-color);
    font-weight: 600;
}

.master-tab-link.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-color);
}


/* Hide mobile header and close button by default */
.mobile-header {
    display: none;
}
.sidebar-close-btn {
    display: none;
}

@media (max-width: 768px) {
    /* Main App Layout Updates */
    .app-container {
        flex-direction: column;
    }

    .main-content {
        margin-left: 0;
        padding: 1.5rem 1rem;
        width: 100%;
        max-width: 100vw;
        overflow-x: hidden;
    }

    /* Mobile Floating Header */
    .mobile-header {
        display: flex !important;
        justify-content: space-between;
        align-items: center;
        padding: 1rem 1.25rem;
        background-color: var(--card-bg);
        border-bottom: 1px solid var(--border-color);
        position: sticky;
        top: 0;
        z-index: 900;
        width: 100%;
        box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    }

    /* Off-Canvas Sidebar */
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 1000;
        box-shadow: 4px 0 15px rgba(0,0,0,0.1);
        width: 280px;
    }

    .sidebar.sidebar-open {
        transform: translateX(0);
    }

    .sidebar-close-btn {
        display: block;
        background: transparent;
        border: none;
        font-size: 1.75rem;
        color: var(--sidebar-text);
        cursor: pointer;
        padding: 0.25rem;
    }

    /* Global Grid Stacking Overrides - Targeting inline grid columns! */
    [style*="grid-template-columns"] {
        grid-template-columns: 1fr !important;
        gap: 1.25rem !important;
    }
    
    [style*="grid-column: span"] {
        grid-column: span 1 !important;
    }

    /* Page Titles and Main Actions */
    .header {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
    }
    
    main > div:first-child[style*="justify-content: space-between"] {
        flex-direction: column !important;
        gap: 1rem;
        align-items: stretch !important;
    }
    main > div:first-child[style*="justify-content: space-between"] .btn {
        justify-content: center;
        width: 100%;
    }

    /* 2-Pane Layout Fix (Plants, Master Data, Enquiry Workspace) */
    main[style*="display: flex"][style*="height:"],
    div[style*="display: flex"][style*="flex: 1"][style*="overflow: hidden"] {
        flex-direction: column !important;
        height: auto !important;
        overflow: visible !important;
    }
    
    div[style*="width: 320px"], 
    div[style*="width: 280px"] {
        width: 100% !important;
        height: auto !important;
        flex: none !important;
        border-right: none !important;
        border-bottom: 1px solid var(--border-color) !important;
    }
    
    div[style*="flex: 1"][style*="overflow: hidden"] {
        overflow: visible !important;
    }

    /* Tabs Horizontal Scrolling */
    .tabs-nav, [style*="display: flex; gap: 2rem; flex-shrink: 0"] {
        overflow-x: auto !important;
        -webkit-overflow-scrolling: touch;
        padding-bottom: 0.5rem !important;
    }

    /* Form Grid Stacking (Overriding repeat(3, 1fr) etc) */
    .form-grid, [style*="grid-template-columns"] {
        grid-template-columns: 1fr !important;
    }

    /* Make ALL data tables scroll intelligently on small screens */
    table {
        display: block !important;
        overflow-x: auto !important;
        white-space: nowrap !important;
        width: 100% !important;
        -webkit-overflow-scrolling: touch;
    }
}