/* ============================================================
   Design tokens — Zinc grey palette (Style Guide 2026)
   ============================================================ */
:root {
    /* Background */
    --color-bg:             #f4f4f5;
    --color-bg-mesh-a:      #d4d4d8;
    --color-bg-mesh-b:      #e4e4e7;
    --color-bg-mesh-c:      #a1a1aa;

    /* Surfaces */
    --color-surface:        #ffffff;
    --color-surface-hover:  #f4f4f5;
    --color-surface-raised: #ffffff;

    /* Borders */
    --color-border:         rgba(212, 212, 216, 0.8);
    --color-border-strong:  #d4d4d8;
    --color-border-focus:   #18181b;

    /* Accent — Near-black */
    --color-accent:         #18181b;
    --color-accent-dark:    #09090b;
    --color-accent-soft:    #f4f4f5;
    --color-accent-text:    #27272a;

    /* Semantic */
    --color-success:        #10b981;
    --color-success-dark:   #059669;
    --color-success-soft:   #ecfdf5;
    --color-success-text:   #065f46;

    --color-warning:        #f59e0b;
    --color-warning-dark:   #d97706;
    --color-warning-soft:   #fffbeb;
    --color-warning-text:   #78350f;

    --color-danger:         #ef4444;
    --color-danger-dark:    #dc2626;
    --color-danger-soft:    #fef2f2;
    --color-danger-text:    #7f1d1d;

    --color-info:           #3b82f6;
    --color-info-dark:      #2563eb;
    --color-info-soft:      #eff6ff;
    --color-info-text:      #1e3a8a;

    /* Text */
    --color-text-primary:   #09090b;
    --color-text-secondary: #52525b;
    --color-text-tertiary:  #a1a1aa;
    --color-text-on-accent: #ffffff;

    /* Shadows */
    --shadow-sm:     0 1px 3px rgba(15, 23, 42, 0.08), 0 1px 2px rgba(15, 23, 42, 0.04);
    --shadow-md:     0 4px 12px rgba(15, 23, 42, 0.08), 0 2px 4px rgba(15, 23, 42, 0.04);
    --shadow-lg:     0 12px 32px rgba(15, 23, 42, 0.1), 0 4px 8px rgba(15, 23, 42, 0.06);
    --shadow-xl:     0 20px 40px rgba(15, 23, 42, 0.12), 0 8px 16px rgba(15, 23, 42, 0.07);
    --shadow-accent: 0 8px 24px rgba(9, 9, 11, 0.22);

    /* Radius */
    --radius-sm:   0.375rem;
    --radius-md:   0.75rem;
    --radius-lg:   1rem;
    --radius-xl:   1.5rem;
    --radius-full: 9999px;

    /* Motion */
    --duration-fast:  150ms;
    --duration-base:  200ms;
    --duration-slow:  300ms;
    --ease-standard:  cubic-bezier(0.4, 0, 0.2, 1);
    --ease-spring:    cubic-bezier(0.34, 1.56, 0.64, 1);
    --transition:     all var(--duration-base) var(--ease-standard);

    /* Spacing */
    --space-1:  0.25rem;
    --space-2:  0.5rem;
    --space-3:  0.75rem;
    --space-4:  1rem;
    --space-6:  1.5rem;
    --space-8:  2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
}

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

/* ============================================================
   Aurora background
   ============================================================ */
body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: var(--color-bg);
    min-height: 100vh;
    color: var(--color-text-primary);
    line-height: 1.6;
    font-size: 0.875rem;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    position: relative;
    overflow-x: hidden;
}

body::before,
body::after {
    content: '';
    position: fixed;
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
}

body::before {
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, var(--color-bg-mesh-a) 0%, transparent 70%);
    top: -250px;
    right: -150px;
    opacity: 0.4;
}

body::after {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--color-bg-mesh-c) 0%, transparent 70%);
    bottom: -200px;
    left: -150px;
    opacity: 0.3;
}

@media (prefers-reduced-motion: no-preference) {
    body::before { animation: aurora-a 18s ease-in-out infinite alternate; }
    body::after  { animation: aurora-b 22s ease-in-out infinite alternate; }
}

@keyframes aurora-a {
    0%   { transform: translate(0, 0) scale(1); }
    100% { transform: translate(40px, 60px) scale(1.08); }
}

@keyframes aurora-b {
    0%   { transform: translate(0, 0) scale(1); }
    100% { transform: translate(-30px, -50px) scale(1.06); }
}

/* ============================================================
   Layout
   ============================================================ */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-8);
    position: relative;
    z-index: 1;
}

/* ============================================================
   Header
   ============================================================ */
header {
    text-align: center;
    margin-bottom: var(--space-8);
    padding: var(--space-8) var(--space-8) var(--space-10);
    background: linear-gradient(135deg, var(--color-accent-dark) 0%, var(--color-accent-text) 100%);
    border-radius: var(--radius-xl);
    position: relative;
    overflow: hidden;
}

header::after {
    content: '';
    position: absolute;
    top: -60px;
    right: -60px;
    width: 240px;
    height: 240px;
    background: radial-gradient(circle, rgba(255,255,255,0.06) 0%, transparent 70%);
    pointer-events: none;
}

h1 {
    font-size: 2rem;
    font-weight: 800;
    color: #ffffff;
    margin-bottom: var(--space-2);
    letter-spacing: -0.025em;
    line-height: 1.2;
}

.subtitle {
    color: #a1a1aa;
    font-size: 0.875rem;
    font-weight: 400;
}

/* ============================================================
   Card
   ============================================================ */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

/* ============================================================
   Controls bar
   ============================================================ */
.controls {
    padding: var(--space-6) var(--space-8);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-4);
    border-bottom: 1px solid var(--color-border);
    background: var(--color-surface);
}

/* ============================================================
   File input / drop zone
   ============================================================ */
.file-input-wrapper {
    position: relative;
}

.file-input-wrapper input[type="file"] {
    position: absolute;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
    top: 0;
    left: 0;
    z-index: 1;
}

.file-input-label {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: 0.625rem var(--space-4);
    background: rgba(244, 244, 245, 0.6);
    border: 2px dashed rgba(24, 24, 27, 0.22);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    z-index: 0;
    min-height: 44px;
}

.file-input-label:hover,
.file-input-wrapper input[type="file"]:focus + .file-input-label,
.file-input-label.focused {
    border-color: var(--color-accent);
    background: rgba(228, 228, 231, 0.7);
    color: var(--color-accent);
    outline: 2px solid var(--color-border-focus);
    outline-offset: 2px;
}

.file-input-wrapper input[type="file"]:focus {
    outline: none;
}

/* ============================================================
   Select
   ============================================================ */
.select-wrapper {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.select-wrapper label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    white-space: nowrap;
    letter-spacing: 0.02em;
}

select {
    padding: 0.625rem 2.25rem 0.625rem var(--space-3);
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    color: var(--color-text-primary);
    cursor: pointer;
    transition: var(--transition);
    min-height: 44px;
    appearance: auto;
    font-family: inherit;
}

select:hover {
    border-color: var(--color-accent);
}

select:focus {
    outline: 2px solid var(--color-border-focus);
    outline-offset: 2px;
}

/* ============================================================
   Buttons
   ============================================================ */
.btn-group {
    display: flex;
    gap: var(--space-2);
    margin-left: auto;
}

button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 0.625rem var(--space-4);
    font-size: 0.875rem;
    font-weight: 600;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    min-height: 44px;
    line-height: 1;
    font-family: inherit;
}

button:focus-visible {
    outline: 2px solid var(--color-border-focus);
    outline-offset: 2px;
}

button::before {
    display: none;
}

button:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

/* Primary — near-black */
.btn-primary {
    background: var(--color-accent);
    color: var(--color-text-on-accent);
    box-shadow: var(--shadow-accent);
}

.btn-primary:hover:not(:disabled) {
    background: var(--color-accent-dark);
    box-shadow: 0 8px 24px rgba(9, 9, 11, 0.28);
    transform: translateY(-1px);
}

.btn-primary:active:not(:disabled) {
    transform: scale(0.98) translateY(0);
}

/* Secondary — white + zinc border */
.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text-primary);
    border-color: var(--color-border-strong);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--color-surface-hover);
    border-color: var(--color-accent);
    transform: translateY(-1px);
}

.btn-secondary:active:not(:disabled) {
    transform: scale(0.98) translateY(0);
}

/* Success */
.btn-success {
    background: var(--color-success);
    color: var(--color-text-on-accent);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.25);
}

.btn-success:hover:not(:disabled) {
    background: var(--color-success-dark);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.35);
    transform: translateY(-1px);
}

/* Print */
.btn-print {
    background: var(--color-surface);
    color: var(--color-text-primary);
    border-color: var(--color-border-strong);
    box-shadow: var(--shadow-sm);
}

.btn-print:hover:not(:disabled) {
    background: var(--color-surface-hover);
    border-color: var(--color-accent);
    transform: translateY(-1px);
}

/* ============================================================
   Status banners
   ============================================================ */
#status:empty { display: none; }

.status {
    margin: 0;
    padding: var(--space-4) var(--space-6);
    font-size: 0.9375rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: var(--space-3);
    border-left: 4px solid transparent;
}

@media (prefers-reduced-motion: no-preference) {
    .status { animation: slideInRight var(--duration-slow) var(--ease-standard); }
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(16px); }
    to   { opacity: 1; transform: translateX(0); }
}

.status.success {
    background: var(--color-success-soft);
    color: var(--color-success-text);
    border-left-color: var(--color-success);
}

.status.info {
    background: var(--color-info-soft);
    color: var(--color-info-text);
    border-left-color: var(--color-info);
}

.status.error {
    background: var(--color-danger-soft);
    color: var(--color-danger-text);
    border-left-color: var(--color-danger);
}

/* ============================================================
   Table
   ============================================================ */
.table-container {
    max-height: 65vh;
    overflow: auto;
}

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

th, td {
    padding: 0.5rem 0.625rem;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

/* Auto-width columns that fit content */
th.auto-width, td.auto-width {
    width: 1%;
    white-space: nowrap;
}

th {
    background: var(--color-surface);
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    font-size: 0.6875rem;
    letter-spacing: 0.08em;
    position: sticky;
    top: 0;
    z-index: 10;
    border-bottom: 2px solid var(--color-border-strong);
}

tbody tr {
    transition: background var(--duration-fast) var(--ease-standard);
}

tbody tr:hover {
    background: rgba(24, 24, 27, 0.09);
}

/* Lagerplatz group shading */
tbody tr.group--odd {
    background: transparent;
}

tbody tr.group--even {
    background: rgba(24, 24, 27, 0.035);
}

tbody tr.group--odd:hover,
tbody tr.group--even:hover {
    background: rgba(24, 24, 27, 0.09);
}

/* Group separator line */
tbody tr.group-start td {
    border-top: 1px solid var(--color-border-strong);
}

.highlight {
    background: rgba(245, 158, 11, 0.08) !important;
    font-weight: 600;
}

/* ============================================================
   Empty state
   ============================================================ */
.empty-state {
    padding: var(--space-12) var(--space-8);
    text-align: center;
    color: var(--color-text-tertiary);
}

@media (prefers-reduced-motion: no-preference) {
    .empty-state { animation: fadeIn var(--duration-slow) var(--ease-standard); }
}

.empty-state svg {
    width: 56px;
    height: 56px;
    margin-bottom: var(--space-4);
    opacity: 0.35;
}

.empty-state p {
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
}
/* ============================================================
   Loading overlay
   ============================================================ */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(9, 9, 11, 0.55);
    -webkit-backdrop-filter: blur(6px);
    backdrop-filter: blur(6px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-overlay.active {
    display: flex;
}

@media (prefers-reduced-motion: no-preference) {
    .loading-overlay.active { animation: fadeIn var(--duration-base) var(--ease-standard); }
}

.loading-content {
    background: var(--color-surface-raised);
    padding: var(--space-10) var(--space-12);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    text-align: center;
    border: 1px solid var(--color-border);
}

@media (prefers-reduced-motion: no-preference) {
    .loading-content { animation: slideUp var(--duration-slow) var(--ease-standard); }
}

.spinner {
    width: 44px;
    height: 44px;
    margin: 0 auto var(--space-6);
    border: 3px solid rgba(24, 24, 27, 0.1);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-text {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin: 0;
}

.loading-subtext {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin: var(--space-1) 0 0;
}
/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 768px) {
    .controls {
        flex-direction: column;
        align-items: stretch;
    }

    .btn-group {
        margin-left: 0;
        flex-wrap: wrap;
    }

    .container {
        padding: var(--space-4);
    }
}

/* ============================================================
   Print styles
   ============================================================ */
@media print {
    body {
        background: white !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
        font-size: 9pt;
    }

    body::before,
    body::after {
        display: none;
    }

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

    header,
    .controls,
    #status,
    .stats,
    .no-print,
    .loading-overlay {
        display: none !important;
    }

    .print-header {
        display: none !important;
    }

    .card {
        box-shadow: none;
        border: none;
        border-radius: 0;
    }

    .table-container {
        max-height: none;
        overflow: visible;
    }

    table {
        font-size: 8pt;
        width: 100%;
    }

    th, td {
        padding: 3pt 5pt;
        border: 0.5pt solid #ccc;
    }

    th {
        background: #e4e4e7 !important;
        color: #18181b !important;
        position: static;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }

    thead, #tableHead {
        display: table-header-group;
    }

    tbody tr {
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }

    tbody tr.group--even {
        background: #ececed !important;
    }

    tbody tr.group--odd {
        background: #ffffff !important;
    }

    tbody tr:hover {
        background: inherit !important;
    }

    .highlight {
        background: #fef3c7 !important;
    }

    .page-number {
        display: block;
        position: fixed;
        bottom: 0.5cm;
        right: 1cm;
        font-size: 8pt;
        color: #888;
    }

    .page-number::after {
        content: "Seite " counter(page);
    }

    @page {
        margin: 1cm 0.5cm;
        counter-increment: page;
    }

    html, body {
        counter-reset: page 1;
    }
}

/* ============================================================
   Print header (hidden on screen)
   ============================================================ */
.print-header {
    display: none;
    padding: 0 0 var(--space-4);
}

/* ============================================================
   Column Selector Modal
   ============================================================ */
.column-selector {
    position: fixed;
    inset: 0;
    background: rgba(9, 9, 11, 0.5);
    -webkit-backdrop-filter: blur(6px);
    backdrop-filter: blur(6px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

@media (prefers-reduced-motion: no-preference) {
    .column-selector { animation: fadeIn var(--duration-base) var(--ease-standard); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

.column-selector-content {
    background: var(--color-surface-raised);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    max-width: 540px;
    width: 90%;
    max-height: 85vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

@media (prefers-reduced-motion: no-preference) {
    .column-selector-content { animation: slideUp var(--duration-slow) var(--ease-standard); }
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(16px) scale(0.97); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

.column-selector-header {
    padding: var(--space-6) var(--space-8);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-4);
}

.column-selector-header h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text-primary);
    letter-spacing: -0.015em;
}

.column-selector-subtitle {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-text-tertiary);
    margin-top: var(--space-1);
    letter-spacing: 0.02em;
}

.column-selector-close {
    background: transparent;
    border: 1px solid transparent;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-text-tertiary);
    min-height: 36px;
    min-width: 36px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    line-height: 1;
}

.column-selector-close:hover {
    color: var(--color-text-primary);
    background: var(--color-surface-hover);
    border-color: var(--color-border-strong);
}

.column-selector-body {
    padding: var(--space-6) var(--space-8);
    overflow-y: auto;
    flex: 1;
}

.column-checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.column-checkbox-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    min-width: 200px;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.column-checkbox-item:hover {
    background: var(--color-surface-hover);
}

.column-checkbox-item input[type="checkbox"] {
    margin: 0;
    width: 16px;
    height: 16px;
    cursor: pointer;
    accent-color: var(--color-accent);
}

.column-checkbox-item label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-primary);
    cursor: pointer;
}

.column-selector-footer {
    padding: var(--space-4) var(--space-8);
    border-top: 1px solid var(--color-border);
    display: flex;
    gap: var(--space-2);
    justify-content: flex-end;
}

/* ============================================================
   Utilities
   ============================================================ */
.column-selector--hidden {
    display: none;
}

.td--empty-state {
    padding: 0;
}

.col--max-fill {
    max-width: 100px;
}

.td--max-fill {
    max-width: 100px;
    word-wrap: break-word;
    font-size: 0.75rem;
}

.th--qr {
    text-align: center;
    width: 50px;
    padding: 0.25rem;
}

.td--qr {
    text-align: center;
    padding: 0.25rem;
}

.qr-img {
    width: 43px;
    height: 43px;
    display: block;
    margin: 0 auto;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: pixelated;
}