:root {
    --bg: #f3f4f6;
    --bg-elevated: #ffffff;
    --border-subtle: #e5e7eb;
    --text-main: #111827;
    --text-muted: #6b7280;

    --accent: #2563eb;
    --accent-soft: rgba(37, 99, 235, 0.08);
    --danger-soft: #fee2e2;

    --radius-lg: 16px;
    --radius-md: 10px;
    --shadow-soft: 0 12px 30px rgba(15, 23, 42, 0.06);

    --titlebar-bg: #f9fafb;
    --titlebar-border: #e5e7eb;
    --pill-bg: #e5e7eb;
    --btn-secondary-bg: #ffffff;
    --btn-secondary-bg-hover: #eff6ff;
    --table-header-bg: #f9fafb;
    --table-stripe: #f3f4f6;

    --accent-border: rgba(37, 99, 235, 0.35);
    --accent-border-hover: rgba(37, 99, 235, 0.55);
    --accent-bg: rgba(37, 99, 235, 0.08);
    --accent-bg-hover: rgba(37, 99, 235, 0.14);
}

:root[data-theme="dark"] {
    --bg: #020617;
    --bg-elevated: #020617;
    --border-subtle: #1f2933;
    --text-main: #e5e7eb;
    --text-muted: #9ca3af;
    --accent: #3b82f6;
    --accent-soft: rgba(59, 130, 246, 0.16);
    --danger-soft: #4a1f24;

    --titlebar-bg: #020617;
    --titlebar-border: #111827;
    --pill-bg: #111827;
    --btn-secondary-bg: #020617;
    --btn-secondary-bg-hover: #111827;
    --table-header-bg: #020617;
    --table-stripe: #020617;

    --accent-border: rgba(59, 130, 246, 0.55);
    --accent-border-hover: rgba(59, 130, 246, 0.8);
    --accent-bg: rgba(59, 130, 246, 0.12);
    --accent-bg-hover: rgba(59, 130, 246, 0.18);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    padding: 0 0 40px;
    font-family: Arial, "Helvetica Neue", Helvetica, sans-serif;
    background: var(--bg);
    color: var(--text-main);
    transition: background 0.25s ease, color 0.25s ease;
}

.app-shell {
    max-width: 1120px;
    margin: 0 auto;
    padding: 18px 20px 0;
}

@media (max-width: 820px) {
    .app-shell { padding: 10px 12px 0; }
}

/* ------------------------------------
   Titlebar (macOS Look)
------------------------------------- */
.titlebar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--titlebar-bg);
    border: 1px solid var(--titlebar-border);
    border-radius: 14px;
    padding: 8px 14px;
    margin: 14px 0 18px;
    box-shadow: 0 8px 22px rgba(15, 23, 42, 0.04);
}

.titlebar-left {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.titlebar-text-main {
    font-size: 16px;
    font-weight: 700;
    letter-spacing: -.03em;
}

.titlebar-text-sub {
    font-size: 11px;
    color: var(--text-muted);
}

.titlebar-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ------------------------------------
   Pill Buttons (Restart, Theme)
------------------------------------- */
.pill-btn {
    border-radius: 999px;
    border: 1px solid var(--border-subtle);
    padding: 4px 10px;
    font-size: 11px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--pill-bg);
    color: var(--text-muted);
    cursor: pointer;
    transition: background 0.16s ease, border-color 0.16s ease, color 0.16s ease, transform 0.12s ease;
}

.pill-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: #e0edf9;
    transform: translateY(-1px);
}

.pill-btn:active {
    transform: translateY(0);
}

.theme-toggle-icon { font-size: 14px; }

/* ------------------------------------
   Header
------------------------------------- */
header { margin-bottom: 16px; }

.app-pill {
    font-size: 11px;
    padding: 4px 12px;
    border-radius: 999px;
    background: var(--accent-soft);
    color: var(--accent);
    letter-spacing: .05em;
    text-transform: uppercase;
}

h1 {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: -.02em;
    margin: 6px 0 4px;
}

.app-subtitle {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 4px;
    line-height: 1.4;
}

/* ------------------------------------
   Tabs
------------------------------------- */
.tabs-bar {
    display: inline-flex;
    border-radius: 999px;
    background: #e5e7eb;
    padding: 3px;
    margin-bottom: 16px;
}

:root[data-theme="dark"] .tabs-bar {
    background: #020617;
    border: 1px solid #111827;
}

.tab-btn {
    border-radius: 999px;
    border: none;
    padding: 6px 14px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    background: transparent;
    color: var(--text-muted);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: background 0.16s ease, color 0.16s ease, transform 0.12s ease, box-shadow 0.16s ease;
}

.tab-btn.active {
    background: #ffffff;
    color: var(--text-main);
    box-shadow: 0 6px 14px rgba(15, 23, 42, 0.12);
}

:root[data-theme="dark"] .tab-btn.active {
    background: #111827;
    color: #e5e7eb;
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ------------------------------------
   Card (Container)
------------------------------------- */
.card {
    background: var(--bg-elevated);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--border-subtle);
    padding: 20px 22px 22px;
    margin-bottom: 20px;
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.card-title {
    font-size: 15px;
    font-weight: 600;
}

.card-tag {
    font-size: 11px;
    padding: 3px 8px;
    border-radius: 999px;
    background: #e5e7eb;
    color: var(--text-muted);
}

:root[data-theme="dark"] .card-tag {
    background: #111827;
    color: var(--text-muted);
}

.info {
    font-size: 12px;
    color: var(--text-muted);
    line-height: 1.5;
}

/* ------------------------------------
   Grid
------------------------------------- */
.grid-2 {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 16px;
}

@media (max-width: 820px) {
    .grid-2 { grid-template-columns: minmax(0, 1fr); }
}

/* ------------------------------------
   Drop Zones
------------------------------------- */
.drop-zone {
    border-radius: var(--radius-md);
    border: 1px dashed var(--border-subtle);
    background: #ffffff;
    padding: 20px 18px;
    text-align: center;
    cursor: pointer;
    position: relative;
    transition: border-color .14s ease-out, background .14s ease-out, box-shadow .14s ease-out, transform .12s ease;
}

:root[data-theme="dark"] .drop-zone {
    background: #020617;
}

.drop-zone-icon {
    font-size: 22px;
    margin-bottom: 6px;
}

.drop-zone-title {
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 2px;
}

.drop-zone-sub {
    font-size: 11px;
    color: var(--text-muted);
}

.drop-zone.hover {
    border-color: var(--accent);
    background: #eff6ff;
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.15);
    transform: translateY(-1px);
}

:root[data-theme="dark"] .drop-zone.hover {
    background: #020617;
    box-shadow: 0 10px 30px rgba(0,0,0,0.7);
}

/* ------------------------------------
   Schlüsselspalten
------------------------------------- */
#keyColumns,
#keyColumnsSingle {
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-subtle);
    background: #f9fafb;
    padding: 16px 18px 14px;
    margin-bottom: 14px;
}

:root[data-theme="dark"] #keyColumns,
:root[data-theme="dark"] #keyColumnsSingle {
    background: #020617;
}

#keyColumns.disabled,
#keyColumnsSingle.disabled {
    opacity: 0.6;
}

#keyColumnsInner,
#keyColumnsInnerSingle {
    margin-top: 10px;
    padding-top: 8px;
    border-top: 1px solid #e5e7eb;
}

:root[data-theme="dark"] #keyColumnsInner,
:root[data-theme="dark"] #keyColumnsInnerSingle {
    border-top-color: #111827;
}

/* ------------------------------------
   Chip Selector (checkbox pills)
------------------------------------- */
.chip-row label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 10px;
    border-radius: 999px;
    border: 1px solid #e5e7eb;
    background: #ffffff;
    margin-right: 6px;
    margin-top: 6px;
    cursor: pointer;
    font-size: 12px;
    transition: background .14s ease, border-color .14s ease, transform .12s ease;
}

:root[data-theme="dark"] .chip-row label {
    background: #020617;
    border-color: #111827;
    color: var(--text-main);
}

.chip-row input[type="checkbox"] {
    accent-color: var(--accent);
    width: 13px;
    height: 13px;
}

.chip-row label:hover {
    border-color: var(--accent-border);
    background: #f9fafb;
    transform: translateY(-1px);
}

/* ------------------------------------
   Prefix highlight
------------------------------------- */
.prefix-title-highlight {
    display: inline-block;
    padding: 6px 12px;
    border-radius: 10px;
    border: 1px solid var(--accent-border);
    background: var(--accent-bg);
    font-weight: 600;
    font-size: 12px;
    margin-top: 6px;
    margin-bottom: 4px;
}

/* ------------------------------------
   Buttons
------------------------------------- */
.btn-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 8px 0 4px;
}

button {
    border-radius: 999px;
    border: none;
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: transform 0.12s ease, box-shadow 0.14s ease, background 0.14s ease, color 0.14s ease, opacity 0.14s ease;
}

button:disabled {
    opacity: 0.45;
    cursor: default;
    box-shadow: none;
    transform: none;
}

.btn-primary {
    background: var(--accent);
    color: #ffffff;
    box-shadow: 0 8px 16px rgba(37, 99, 235, 0.22);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 12px 24px rgba(37, 99, 235, 0.28);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
    box-shadow: 0 6px 14px rgba(37, 99, 235, 0.26);
}

.btn-secondary {
    background: var(--btn-secondary-bg);
    color: var(--text-main);
    border: 1px solid var(--border-subtle);
    box-shadow: none;
}

.btn-secondary:hover:not(:disabled) {
    background: var(--btn-secondary-bg-hover);
    transform: translateY(-1px);
    box-shadow: 0 8px 16px rgba(15, 23, 42, 0.06);
}

/* ------------------------------------
   Criteria
------------------------------------- */
.criteria {
    font-size: 12px;
    color: var(--text-muted);
    margin: 4px 0 8px;
}

.summary-text {
    font-size: 13px;
    margin-top: 8px;
    margin-bottom: 4px;
}

/* ------------------------------------
   Tabellen
------------------------------------- */
table {
    border-collapse: collapse;
    margin-top: 10px;
    width: 100%;
    max-width: 100%;
    font-size: 12px;
}

th, td {
    border: 1px solid #e5e7eb;
    padding: 6px 8px;
}

:root[data-theme="dark"] th,
:root[data-theme="dark"] td {
    border-color: #111827;
}

th {
    background: var(--table-header-bg);
    font-weight: 600;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: .04em;
    color: var(--text-muted);
}

tr.duplicate {
    background-color: #fef2f2;
}

tr.duplicate td {
    color: #991b1b;
}

:root[data-theme="dark"] tr.duplicate {
    background-color: #3a1b20;
}

:root[data-theme="dark"] tr.duplicate td {
    color: #fee2e2;
}

tr:nth-child(even):not(.duplicate) {
    background: var(--table-stripe);
}

.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 10px;
    margin-left: 4px;
}

.badge.dup {
    background-color: #fee2e2;
    color: #991b1b;
}

.badge.ok {
    background-color:
        #dcfce7; color: #166534;
}

:root[data-theme="dark"] .badge.dup {
    background-color: #5a252c;
    color: #ffccd5;
}

:root[data-theme="dark"] .badge.ok {
    background-color: #14532d;
    color: #bbf7d0;
}

/* ------------------------------------
   Filter
------------------------------------- */
.filter-row {
    font-size: 13px;
    margin-top: 10px;
    margin-bottom: 4px;
}