/* ══════════════════════════════════════════════════
   Low Stock QR System — Premium Dark Theme
   ══════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #111827;
    --bg-card: rgba(17, 24, 39, 0.8);
    --bg-glass: rgba(255, 255, 255, 0.05);
    --bg-glass-hover: rgba(255, 255, 255, 0.1);
    --border-glass: rgba(255, 255, 255, 0.1);
    --border-subtle: rgba(255, 255, 255, 0.06);

    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --accent-red: #ef4444;
    --accent-red-glow: rgba(239, 68, 68, 0.3);
    --accent-amber: #f59e0b;
    --accent-amber-glow: rgba(245, 158, 11, 0.3);
    --accent-green: #22c55e;
    --accent-green-glow: rgba(34, 197, 94, 0.3);
    --accent-blue: #3b82f6;
    --accent-blue-glow: rgba(59, 130, 246, 0.3);

    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* ─── Layout ─── */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.container-narrow {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
}

/* ─── Header ─── */
.site-header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-glass);
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    backdrop-filter: blur(12px);
    position: sticky;
    top: 0;
    z-index: 100;
}

.site-header h1 {
    font-size: 1.25rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
}

.site-header h1 .icon {
    font-size: 1.5rem;
}

.site-header nav {
    display: flex;
    gap: 12px;
}

.site-header nav a {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid transparent;
}

.site-header nav a:hover,
.site-header nav a.active {
    color: var(--text-primary);
    background: var(--bg-glass-hover);
    border-color: var(--border-glass);
}

/* ─── Glass Cards ─── */
.glass-card {
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.glass-card:hover {
    border-color: rgba(255, 255, 255, 0.15);
}

/* ─── Buttons ─── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: 'Inter', sans-serif;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    line-height: 1;
}

.btn-primary {
    background: var(--accent-blue);
    color: white;
    box-shadow: 0 2px 12px var(--accent-blue-glow);
}

.btn-primary:hover {
    background: #2563eb;
    transform: translateY(-1px);
    box-shadow: 0 4px 20px var(--accent-blue-glow);
}

.btn-danger {
    background: var(--accent-red);
    color: white;
    box-shadow: 0 2px 12px var(--accent-red-glow);
}

.btn-danger:hover {
    background: #dc2626;
    transform: translateY(-1px);
}

.btn-success {
    background: var(--accent-green);
    color: white;
    box-shadow: 0 2px 12px var(--accent-green-glow);
}

.btn-success:hover {
    background: #16a34a;
    transform: translateY(-1px);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-glass);
}

.btn-ghost:hover {
    background: var(--bg-glass-hover);
    color: var(--text-primary);
}

.btn-lg {
    padding: 14px 28px;
    font-size: 1rem;
    border-radius: var(--radius);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.75rem;
}

/* ─── Inputs ─── */
input[type="text"],
input[type="password"],
input[type="email"],
input[type="number"],
input[type="file"],
textarea,
select {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    font-size: 0.875rem;
    transition: var(--transition);
    outline: none;
}

input:focus,
textarea:focus,
select:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px var(--accent-blue-glow);
}

textarea {
    resize: vertical;
    min-height: 80px;
}

label {
    display: block;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ─── Scan Success Page ─── */
.scan-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    text-align: center;
}

.scan-success {
    animation: slideUp 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.scan-icon {
    width: 96px;
    height: 96px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    font-size: 48px;
    animation: pulse 2s ease-in-out infinite;
}

.scan-icon.success {
    background: var(--accent-green-glow);
    border: 2px solid var(--accent-green);
}

.scan-icon.already {
    background: var(--accent-amber-glow);
    border: 2px solid var(--accent-amber);
}

.scan-icon.error {
    background: var(--accent-red-glow);
    border: 2px solid var(--accent-red);
}

.product-image {
    width: 200px;
    height: 200px;
    object-fit: contain;
    border-radius: var(--radius);
    background: var(--bg-secondary);
    border: 1px solid var(--border-glass);
    margin: 20px auto;
}

.item-name {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 12px 0 4px;
}

.item-code {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-weight: 500;
}

.item-category {
    display: inline-block;
    padding: 4px 12px;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: 20px;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 8px;
}

.notes-section {
    margin-top: 24px;
    width: 100%;
    max-width: 400px;
}

.notes-section textarea {
    margin-bottom: 10px;
}

/* ─── Admin Dashboard ─── */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    text-align: center;
    padding: 20px;
}

.stat-card .stat-value {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 4px;
}

.stat-card .stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.stat-card.danger .stat-value { color: var(--accent-red); }
.stat-card.warning .stat-value { color: var(--accent-amber); }
.stat-card.success .stat-value { color: var(--accent-green); }
.stat-card.info .stat-value { color: var(--accent-blue); }

/* ─── Tables ─── */
.table-container {
    overflow-x: auto;
    border-radius: var(--radius);
    border: 1px solid var(--border-glass);
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

table thead {
    background: var(--bg-secondary);
}

table th {
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    font-size: 0.7rem;
    letter-spacing: 0.08em;
    border-bottom: 1px solid var(--border-glass);
}

table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-subtle);
    vertical-align: middle;
}

table tbody tr {
    transition: var(--transition);
}

table tbody tr:hover {
    background: var(--bg-glass-hover);
}

table img.table-thumb {
    width: 48px;
    height: 48px;
    object-fit: contain;
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
}

/* ─── Login Form ─── */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-box {
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.login-box h2 {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.login-box p {
    color: var(--text-muted);
    margin-bottom: 24px;
    font-size: 0.875rem;
}

.login-box .form-group {
    margin-bottom: 16px;
    text-align: left;
}

/* ─── Card Creator ─── */
.creator-layout {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 24px;
    min-height: calc(100vh - 80px);
}

@media (max-width: 900px) {
    .creator-layout {
        grid-template-columns: 1fr;
    }
}

.card-preview-area {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.card-canvas {
    width: 576px; /* 6in * 96dpi */
    height: 384px; /* 4in * 96dpi */
    background: white;
    border-radius: 4px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 8px 40px rgba(0,0,0,0.5);
    color: #000;
}

.card-canvas .card-header-text {
    position: absolute;
    top: 16px;
    left: 0;
    width: 100%;
    text-align: center;
    font-size: 24px;
    font-weight: 700;
    color: #ff0000;
}

.card-canvas .card-qr {
    position: absolute;
    top: 90px;
    left: 21px;
    width: 150px;
    height: 150px;
}

.card-canvas .card-qr canvas {
    width: 100% !important;
    height: 100% !important;
}

.card-canvas .card-image {
    position: absolute;
    top: 55px;
    left: 170px;
    width: 252px;
    height: 252px;
    object-fit: contain;
}

.card-canvas .card-barcode-text {
    position: absolute;
    top: 250px;
    left: 0;
    width: 180px;
    text-align: center;
    font-size: 18px;
    font-weight: 600;
    color: #000;
}

.card-canvas .card-location {
    position: absolute;
    top: 110px;
    right: 20px;
    font-size: 18px;
    font-weight: 600;
    color: #0000ff;
}

.card-canvas .card-description {
    position: absolute;
    bottom: 8px;
    left: 0;
    width: 100%;
    text-align: center;
    font-size: 16px;
    font-weight: 700;
    color: #ff0000;
    padding: 0 10px;
}

.creator-sidebar {
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-glass);
    padding: 20px;
    overflow-y: auto;
    max-height: calc(100vh - 80px);
}

.creator-sidebar h3 {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: 12px;
    margin-top: 20px;
}

.creator-sidebar h3:first-child {
    margin-top: 0;
}

.nav-buttons {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
}

.nav-buttons .btn {
    flex: 1;
}

.record-counter {
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 16px;
}

/* ─── Action Bar ─── */
.action-bar {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 24px;
    align-items: center;
}

.action-bar .spacer {
    flex: 1;
}

/* ─── Toast ─── */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    padding: 12px 20px;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    animation: slideIn 0.3s ease;
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-glass);
    max-width: 400px;
}

.toast.success {
    background: rgba(34, 197, 94, 0.15);
    color: var(--accent-green);
    border-color: rgba(34, 197, 94, 0.3);
}

.toast.error {
    background: rgba(239, 68, 68, 0.15);
    color: var(--accent-red);
    border-color: rgba(239, 68, 68, 0.3);
}

.toast.info {
    background: rgba(59, 130, 246, 0.15);
    color: var(--accent-blue);
    border-color: rgba(59, 130, 246, 0.3);
}

/* ─── Badge ─── */
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-danger {
    background: var(--accent-red-glow);
    color: var(--accent-red);
}

.badge-success {
    background: var(--accent-green-glow);
    color: var(--accent-green);
}

.badge-warning {
    background: var(--accent-amber-glow);
    color:  var(--accent-amber);
}

/* ─── Empty State ─── */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.empty-state .icon {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

/* ─── Animations ─── */
@keyframes slideUp {
    from { opacity: 0; transform: translateY(30px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
    from { opacity: 0; transform: translateX(30px); }
    to   { opacity: 1; transform: translateX(0); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50%      { transform: scale(1.05); }
}

@keyframes checkmark {
    0%   { stroke-dashoffset: 100; }
    100% { stroke-dashoffset: 0; }
}

/* ─── Print Styles ─── */
@media print {
    body {
        background: white !important;
        color: black !important;
    }

    .site-header,
    .action-bar,
    .btn,
    .no-print,
    .toast-container {
        display: none !important;
    }

    .container {
        max-width: 100%;
        padding: 0;
    }

    .glass-card {
        background: white !important;
        border: 1px solid #ddd !important;
        box-shadow: none !important;
        backdrop-filter: none !important;
        break-inside: avoid;
    }

    table th {
        background: #f0f0f0 !important;
        color: black !important;
    }

    table td {
        border-bottom: 1px solid #ddd !important;
        color: black !important;
    }

    .stat-card .stat-value {
        color: black !important;
    }

    .badge {
        border: 1px solid #999;
        color: black !important;
        background: transparent !important;
    }

    .print-report-title {
        display: block !important;
        font-size: 1.5rem;
        font-weight: 700;
        text-align: center;
        margin-bottom: 20px;
    }

    /* Card creator print */
    .creator-sidebar,
    .card-preview-area {
        display: none !important;
    }

    .print-cards-container {
        display: block !important;
    }

    .print-card {
        width: 6in;
        height: 4in;
        page-break-after: always;
        position: relative;
        overflow: hidden;
    }
}

.print-report-title {
    display: none;
}

.print-cards-container {
    display: none;
}

/* ─── Responsive ─── */
@media (max-width: 768px) {
    .site-header {
        flex-direction: column;
        gap: 12px;
    }

    .site-header nav {
        flex-wrap: wrap;
        justify-content: center;
    }

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

    .card-canvas {
        width: 100%;
        height: auto;
        aspect-ratio: 6 / 4;
    }

    .product-image {
        width: 150px;
        height: 150px;
    }
}

/* ─── File upload area ─── */
.file-drop-zone {
    border: 2px dashed var(--border-glass);
    border-radius: var(--radius);
    padding: 30px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-muted);
}

.file-drop-zone:hover {
    border-color: var(--accent-blue);
    background: var(--bg-glass);
}

.file-drop-zone.dragover {
    border-color: var(--accent-green);
    background: var(--accent-green-glow);
}

/* ─── Category filter pills ─── */
.filter-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.filter-pill {
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.filter-pill:hover,
.filter-pill.active {
    background: var(--accent-blue-glow);
    border-color: var(--accent-blue);
    color: var(--accent-blue);
}

/* ─── Scrollbar ─── */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-glass);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}