:root {
    --primary: #2563eb;       /* Rich Blue */
    --secondary: #10b981;
    --accent: #f59e0b;        /* Vibrant Orange */
    --danger: #ef4444;
    --bg-main: #ffffff;       /* Pure White Background */
    --bg-sidebar: #0f172a;    /* Deep Black/Navy Sidebar */
    --bg-card: #ffffff;       /* White Cards */
    --text-main: #0f172a;     /* Black Text */
    --text-muted: #64748b;    /* Gray Text */
    --border-light: #e2e8f0;
    --supreme-gradient: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    --cri-gradient: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    --sidebar-width: 260px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
}

.hidden {
    display: none !important;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    overflow-x: hidden;
    min-height: 100vh;
}

h1, h2, h3, h4 {
    font-family: 'Outfit', sans-serif;
    font-weight: 600;
}

/* Card Utilities */
.glass {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-md);
    border-radius: 16px;
}

.glass-btn {
    background: #f1f5f9;
    border: 1px solid var(--border-light);
    color: var(--text-main);
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 500;
}

.glass-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.glass-btn.active {
    background: var(--primary);
    border-color: var(--primary);
}

/* Layout */
#app {
    display: none;
    min-height: 100vh;
}

.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--sidebar-width);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 32px;
    z-index: 100;
    background: var(--bg-sidebar);
    color: white;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 700;
    color: white;
    padding-bottom: 24px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.logo i { color: var(--primary); }

.nav-links { display: flex; flex-direction: column; gap: 8px; }

.nav-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 18px;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    color: rgba(255,255,255,0.7);
    font-weight: 500;
}

.nav-item:hover, .nav-item.active {
    background: rgba(59, 130, 246, 0.1);
    color: white;
}

.nav-item.active i { color: var(--primary); }

#user-role-name {
    font-size: 15px;
    font-weight: 700;
    line-height: 1.2;
    color: white;
}

.user-status-text {
    font-size: 10px;
    color: rgba(255,255,255,0.4);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-top: 4px;
}

.main-content {
    margin-left: var(--sidebar-width);
    padding: 40px;
    width: calc(100% - var(--sidebar-width));
}

/* Login Screen */
#login-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: #f1f5f9;
}

.login-card {
    width: 100%;
    max-width: 400px;
    padding: 40px;
    text-align: center;
    background: white;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    animation: fadeIn 0.8s ease-out;
}

.login-card h1 { margin-bottom: 8px; font-size: 28px; }
.login-card p { color: var(--text-muted); margin-bottom: 32px; }

.role-selector { display: flex; flex-direction: column; gap: 16px; }

.role-btn {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px;
    border-radius: 12px;
    background: #f8fafc;
    border: 1px solid var(--border-light);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.role-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: scale(1.02);
    border-color: var(--primary);
}

.role-info { display: flex; align-items: center; gap: 16px; text-align: left; }

.role-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(59, 130, 246, 0.2);
    color: var(--primary);
}

.role-text h3 { font-size: 16px; margin-bottom: 2px; }
.role-text p { font-size: 12px; margin-bottom: 0; color: var(--text-muted); }
.status-indicator {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: #f1f5f9;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    margin-bottom: 24px;
}
.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #94a3b8;
}
.status-online .status-dot { background: #10b981; box-shadow: 0 0 8px rgba(16, 185, 129, 0.4); }
.status-offline .status-dot { background: #ef4444; box-shadow: 0 0 8px rgba(239, 68, 68, 0.4); }
.status-online .status-text { color: #059669; }
.status-offline .status-text { color: #dc2626; }

/* Dashboard Styles */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
}

.stat-card { padding: 24px; display: flex; flex-direction: column; gap: 16px; }
.stat-header { display: flex; justify-content: space-between; align-items: center; }
.stat-icon { width: 40px; height: 40px; border-radius: 10px; display: flex; align-items: center; justify-content: center; }
.stat-value { font-size: 32px; font-weight: 700; font-family: 'Outfit'; }
.stat-label { color: var(--text-muted); font-size: 14px; }

/* Module Sections */
.module-header { 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    margin-bottom: 12px;
    flex-wrap: wrap;
    gap: 8px;
}
.brand-badge { 
    padding: 6px 16px; 
    border-radius: 20px; 
    font-size: 11px; 
    font-weight: 700; 
    text-transform: uppercase; 
    letter-spacing: 0.03em;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
}
.badge-supreme { background: var(--supreme-gradient); color: white; }
.badge-cri { background: var(--cri-gradient); color: white; }

.inventory-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 24px; }
.product-card { 
    padding: 24px; 
    position: relative; 
    overflow: hidden; 
    transition: all 0.3s ease; 
    background: white;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    border-radius: 12px;
}

.product-card:hover { transform: translateY(-5px); border-color: var(--primary); box-shadow: var(--shadow-md); }
.product-card::before { content: ''; position: absolute; top: 0; left: 0; width: 4px; height: 100%; background: var(--primary); }
.product-card.supreme::before { background: #f59e0b; }
.product-card.cri::before { background: #3b82f6; }

.product-info h3 { margin-bottom: 8px; font-size: 18px; }
.spec-item { display: flex; justify-content: space-between; font-size: 14px; margin-bottom: 6px; color: var(--text-muted); }
.spec-value { color: var(--text-main); font-weight: 500; }
.stock-indicator { margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--border-light); display: flex; flex-direction: column; gap: 8px; }
.stock-main { display: flex; justify-content: space-between; align-items: center; width: 100%; }
.stock-level { font-size: 20px; font-weight: 700; }

.sn-nearby {
    font-size: 11px;
    color: var(--text-muted);
    background: #f8fafc;
    padding: 4px 8px;
    border-radius: 6px;
    border: 1px solid var(--border-light);
    display: flex;
    gap: 4px;
    align-items: center;
}

.sn-label { font-weight: 700; color: var(--primary); text-transform: uppercase; font-size: 9px; }
.sn-list { font-family: monospace; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* Forms & Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content { 
    width: 100%; 
    max-width: 500px; 
    padding: 32px; 
    background: white;
    border-radius: 20px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

#request-modal .modal-content {
    max-width: 850px;
}

.form-group { margin-bottom: 20px; }
.form-group label { display: block; margin-bottom: 8px; font-size: 14px; color: var(--text-muted); }
.form-control { 
    width: 100%; 
    background: #f8fafc; 
    border: 1px solid var(--border-light); 
    padding: 12px 16px; 
    border-radius: 8px; 
    color: var(--text-main); 
    outline: none; 
}
.form-control:focus { border-color: var(--primary); }

/* Tables */
.table-container { 
    width: 100%; 
    overflow-x: auto; 
    border-radius: 12px;
    background: white;
    -webkit-overflow-scrolling: touch;
}
table { width: 100%; border-collapse: collapse; min-width: 400px; }
th, td { 
    padding: 12px 16px; 
    text-align: left; 
    border-bottom: 1px solid var(--border-light); 
    vertical-align: middle;
    white-space: nowrap;
}
th { 
    background: #f8fafc;
    color: var(--text-muted); 
    font-weight: 700; 
    font-size: 12px; 
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
td { font-size: 14px; color: var(--text-main); white-space: normal; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: #fcfdfe; }

.status-pill { padding: 4px 12px; border-radius: 20px; font-size: 12px; font-weight: 500; }
.status-pending { background: rgba(245, 158, 11, 0.2); color: #f59e0b; }
.status-approved { background: rgba(16, 185, 129, 0.2); color: #10b981; }
.status-rejected { background: rgba(239, 68, 68, 0.2); color: #ef4444; }
.status-returned { background: rgba(245, 158, 11, 0.15); color: #d97706; }

/* Animations */
@keyframes fadeIn { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
.page-view { display: none; animation: fadeIn 0.4s ease-out; }
.page-view.active { display: block; }

/* Utility */
.hidden { display: none !important; }
.flex { display: flex; gap: 12px; }
.items-center { align-items: center; }
.gap-4 { gap: 20px !important; }
.text-primary { color: var(--primary); }
.text-danger { color: var(--danger); }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mt-8 { margin-top: 32px; }
.mt-10 { margin-top: 40px; }
.mb-4 { margin-bottom: 12px; }
.mb-6 { margin-bottom: 20px; }

/* Responsive Adjustments */
.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: var(--bg-sidebar);
    color: white;
    padding: 0 20px;
    align-items: center;
    justify-content: space-between;
    z-index: 1001;
}

.menu-toggle {
    background: transparent;
    border: none;
    color: white;
    cursor: pointer;
}

@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        box-shadow: 20px 0 50px rgba(0,0,0,0.5);
    }

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

    .main-content {
        margin-left: 0;
        padding: 80px 16px 40px;
        width: 100%;
    }

    .mobile-header {
        display: flex;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .table-container {
        font-size: 13px;
        overflow-x: auto;
    }

    th, td {
        padding: 12px;
    }

    .module-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }

    .module-header .flex {
        width: 100%;
        justify-content: space-between;
    }

    .module-header input {
        flex: 1;
    }
}

@media (max-width: 640px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .table-container {
        font-size: 12px;
    }
    
    .brand-badge {
        font-size: 10px;
        padding: 2px 6px;
    }
}
/* Custom Scrollbar for History */
.table-container::-webkit-scrollbar {
    width: 6px;
}
.table-container::-webkit-scrollbar-track {
    background: #f1f5f9;
    border-radius: 10px;
}
.table-container::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 10px;
}
.table-container::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

#stock-history-table tr {
    transition: background 0.2s ease;
}
#stock-history-table tr:hover {
    background: rgba(59, 130, 246, 0.03);
}

.stock-history-date {
    font-size: 12px;
    color: var(--text-muted);
}

.stock-history-qty {
    font-weight: 700;
    color: var(--secondary);
}

/* --- Advanced Stock History Styles --- */
.stock-summary-card {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 24px;
    padding: 16px;
    background: #f8fafc;
    border-radius: 12px;
    border: 1px solid var(--border-light);
}

.summary-stat {
    text-align: center;
}

.summary-stat .label {
    display: block;
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 4px;
}

.summary-stat .value {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
}

.history-type-badge {
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
}

.badge-inflow { background: rgba(16, 185, 129, 0.1); color: #10b981; }
.badge-adjustment { background: rgba(59, 130, 246, 0.1); color: #3b82f6; }
.badge-initial { background: rgba(100, 116, 139, 0.1); color: #64748b; }

.history-row {
    transition: all 0.3s ease;
}

.history-row:first-child {
    background: rgba(59, 130, 246, 0.05);
    border-left: 3px solid var(--primary);
}

.history-row:hover {
    background: #f1f5f9;
}

@keyframes pulse-soft {
    0% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.2); }
    70% { box-shadow: 0 0 0 10px rgba(59, 130, 246, 0); }
    100% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0); }
}

.latest-entry {
    animation: pulse-soft 2s infinite;
}

.unit-status-pill {
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
}

.unit-available { background: rgba(16, 185, 129, 0.1); color: #10b981; }
.unit-dispatched { background: rgba(100, 116, 139, 0.1); color: #64748b; }

.location-badge {
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: 700;
    background: #f1f5f9;
    color: var(--text-muted);
    border: 1px solid var(--border-light);
}

.location-stock-breakdown {
    margin-top: 8px;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.loc-pill {
    font-size: 11px;
    padding: 2px 8px;
    background: rgba(59, 130, 246, 0.05);
    border: 1px solid rgba(59, 130, 246, 0.2);
    color: var(--primary);
    border-radius: 12px;
    font-weight: 600;
}

/* ── Serial Count Badge ── */
.serial-count-badge {
    font-size: 11px;
    font-weight: 700;
    padding: 2px 10px;
    border-radius: 20px;
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary);
    border: 1px solid rgba(59, 130, 246, 0.2);
    transition: all 0.2s;
}
.serial-count-badge.has-count {
    background: rgba(16, 185, 129, 0.1);
    color: var(--secondary);
    border-color: rgba(16, 185, 129, 0.3);
}

/* ── Inline Field Validation ── */
.field-error {
    font-size: 11px;
    color: var(--danger);
    display: block;
    margin-top: 4px;
    min-height: 14px;
    transition: opacity 0.2s;
}
.field-error-box {
    background: rgba(239, 68, 68, 0.07);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: 8px;
    padding: 10px 14px;
    font-size: 13px;
    color: var(--danger);
    font-weight: 600;
    margin-bottom: 16px;
}
.form-control.invalid {
    border-color: var(--danger) !important;
    background: rgba(239, 68, 68, 0.04);
}

/* ── Unit Status Pills (extended) ── */
.unit-sold { background: rgba(239, 68, 68, 0.1); color: var(--danger); }
.unit-in-transit { background: rgba(245, 158, 11, 0.1); color: var(--accent); }

/* ── Serial Search Results ── */
.serial-result-card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 16px;
    border-radius: 10px;
    background: #f8fafc;
    border: 1px solid var(--border-light);
    margin-bottom: 8px;
}
.serial-result-card:last-child { margin-bottom: 0; }
.serial-mono {
    font-family: monospace;
    font-weight: 700;
    font-size: 14px;
    color: var(--primary);
}

/* Serial Number Manager Modal Styles */
#serial-manager-modal .modal-content {
    max-width: 500px;
}

.manager-tabs {
    display: flex;
    gap: 20px;
    border-bottom: 1px solid var(--border-light);
    margin-bottom: 24px;
}

.manager-tab {
    padding: 10px 4px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-muted);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.2s ease;
}

.manager-tab.active {
    color: var(--secondary);
    border-color: var(--secondary);
}

.manager-pane {
    display: none;
}

.manager-pane.active {
    display: block;
}

.chip-container {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 12px;
    background: #f8fafc;
    border: 1px solid var(--border-light);
    border-radius: 12px;
    min-height: 120px;
    max-height: 250px;
    overflow-y: auto;
    margin-top: 12px;
}

.sn-tag {
    background: white;
    border: 1px solid var(--border-light);
    color: var(--text-main);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: var(--shadow-sm);
    animation: fadeIn 0.2s ease;
}

.sn-tag i {
    color: var(--danger);
    cursor: pointer;
    transition: transform 0.2s ease;
}

.sn-tag i:hover {
    transform: scale(1.2);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

.autocomplete-wrapper {
    position: relative;
}

.suggestions-list {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    border: 1px solid var(--border-light);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    z-index: 1000;
    margin-top: 4px;
    max-height: 200px;
    overflow-y: auto;
    display: none;
}

.suggestion-item {
    padding: 10px 16px;
    cursor: pointer;
    font-size: 14px;
    transition: background 0.2s ease;
}

.suggestion-item:hover {
    background: #f1f5f9;
    color: var(--primary);
}

.range-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 100px;
    gap: 12px;
    align-items: end;
}

/* Direct Serial Visibility on Cards */
.product-serials-list {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px dashed var(--border-light);
}

.serials-header {
    display: flex;
    justify-content: space-between;
    font-size: 10px;
    font-weight: 700;
    color: var(--text-muted);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.serials-scroll-area {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    max-height: 80px;
    overflow-y: auto;
    padding-right: 4px;
}

.mini-serial-chip {
    font-size: 10px;
    padding: 2px 6px;
    background: #f1f5f9;
    border: 1px solid var(--border-light);
    border-radius: 4px;
    color: var(--text-main);
    font-family: 'JetBrains Mono', monospace;
    white-space: nowrap;
}

.mini-serial-chip.status-in-transit {
    border-color: var(--accent);
    background: rgba(245, 158, 11, 0.1);
    color: #b45309;
}

.serials-scroll-area::-webkit-scrollbar {
    width: 3px;
}

.serials-scroll-area::-webkit-scrollbar-track {
    background: transparent;
}

.serials-scroll-area::-webkit-scrollbar-thumb {
    background: var(--border-light);
    border-radius: 3px;
}