:root {
    --dark-blue: #003366;
    --white: #ffffff;
    --grid-line: #d1d5db; /* Sichtbare, scharfe Rahmenlinien */
    --today-color: #e74c3c;
    --bg-app: #f3f4f6;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-app);
    margin: 0;
    padding: 0;
}

.app-container {
    display: flex;
    min-height: 100vh;
    overflow: hidden; /* Verhindert doppelte Scrollbars am Body */
}

/* Linker Kalender-Bereich */
.calendar-section {
    flex: 7;
    padding: 20px;
    background: white;
    border-right: 2px solid var(--grid-line);
    overflow-y: auto; /* Scrollt unabhängig */
    max-height: 100vh;
    box-sizing: border-box;
}

.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 10px;
    border-bottom: 3px solid var(--dark-blue);
    margin-bottom: 20px;
}

.calendar-header h1 {
    margin: 0;
    color: var(--dark-blue);
}

.calendar-header select {
    padding: 8px 16px;
    font-size: 1rem;
    font-weight: bold;
    border: 2px solid var(--dark-blue);
    border-radius: 6px;
}

.month-title-banner {
    background-color: var(--dark-blue);
    color: var(--white);
    padding: 10px 15px;
    font-size: 1.15rem;
    font-weight: bold;
    border-radius: 4px 4px 0 0;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.months-container {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.calendar-table {
    width: 100%;
    border-collapse: collapse;
    border: 2px solid var(--grid-line);
}

.calendar-table th {
    background-color: #f8fafc;
    padding: 10px;
    font-weight: 800; /* Extra fette Wochentage */
    color: #1f2937;
    border: 1px solid var(--grid-line);
}

.calendar-table td {
    border: 1px solid var(--grid-line);
    height: 50px;
    text-align: center;
    vertical-align: middle;
}

/* Spezielle Spalten-Formatierungen */
.kw-col {
    background-color: #edf2f7 !important;
    width: 45px;
    font-size: 0.8rem;
}

.kw-cell {
    background-color: #f1f5f9;
    font-style: italic;
    color: #64748b;
    font-weight: bold;
}

/* Tag-Spezials */
.day-cell {
    font-weight: 600;
}

.day-cell.past {
    color: #cbd5e1;
    background-color: #fcfcfc;
}

.day-cell.weekend {
    background-color: #fff1f2;
    color: #be123c;
}

.day-cell.holiday {
    background-color: #e0f2fe;
    color: #0369a1;
}

/* Der Tischkalender-Schieber für Heute */
.day-cell.today {
    outline: 4px solid var(--today-color);
    outline-offset: -4px;
    background-color: #fef2f2;
    font-weight: 900;
    color: var(--today-color);
}

.we-head {
    color: #be123c;
}

.empty {
    background-color: #f9fafb;
}

/* Rechter Sidebar-Bereich */
.sidebar-section {
    flex: 3;
    padding: 20px;
    background: #f8fafc;
    max-height: 100vh;
    overflow-y: auto; /* Scrollt unabhängig */
    box-sizing: border-box;
    border-left: 1px solid var(--grid-line);
}

.calculator-card {
    background: white;
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--grid-line);
}

.calculator-card h2 {
    color: var(--dark-blue);
    margin-top: 0;
    margin-bottom: 20px;
    font-size: 1.3rem;
    border-bottom: 2px solid var(--dark-blue);
    padding-bottom: 8px;
}

.calc-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-weight: 700;
    font-size: 0.9rem;
    color: #374151;
}

.form-group input[type="date"] {
    padding: 10px;
    border: 1px solid var(--grid-line);
    border-radius: 6px;
    font-size: 0.95rem;
    font-family: inherit;
}

.form-group input[type="date"]:focus {
    border-color: var(--dark-blue);
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 51, 102, 0.15);
}

.help-text {
    font-size: 0.75rem;
    color: #6b7280;
}

.calc-btn {
    background-color: var(--dark-blue);
    color: white;
    padding: 12px;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.1s ease;
    margin-top: 10px;
}

.calc-btn:hover {
    background-color: #002244;
}

/* Ergebnis-Karten */
.result-box {
    margin-top: 24px;
    padding: 20px;
    border-radius: 8px;
    border-left: 5px solid;
}

.result-box.ok {
    background-color: #f0fdf4;
    border-color: #28a745;
}

.result-box.adjusted {
    background-color: #eff6ff;
    border-color: #3b82f6;
}

.result-box.critical {
    background-color: #fff5f5;
    border-color: #e74c3c;
}

.result-box h3 {
    margin-top: 0;
    margin-bottom: 5px;
    font-size: 1rem;
    color: #4b5563;
}

.result-date {
    font-size: 1.35rem;
    font-weight: 800;
    color: #111827;
    margin-bottom: 12px;
}

.result-warning {
    background-color: #ffebe9;
    border: 1px solid #ffccc7;
    color: #e74c3c;
    padding: 10px;
    border-radius: 6px;
    font-size: 0.85rem;
    margin-bottom: 12px;
    font-weight: 600;
}

.result-explanation {
    font-size: 0.9rem;
    line-height: 1.5;
    color: #374151;
    margin-bottom: 15px;
}

.result-details {
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    padding-top: 12px;
}

.result-details h4 {
    margin: 0 0 8px 0;
    font-size: 0.8rem;
    color: #6b7280;
    text-transform: uppercase;
}

.result-details ul {
    margin: 0;
    padding-left: 20px;
    font-size: 0.8rem;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.detail-note {
    color: #888;
}

/* Legende */
.legend-card {
    margin-top: 25px;
    border-top: 1px solid var(--grid-line);
    padding-top: 15px;
}

.legend-card h3 {
    margin-top: 0;
    font-size: 0.9rem;
    color: #6b7280;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    margin-bottom: 8px;
    color: #374151;
}

.legend-color {
    width: 16px;
    height: 16px;
    border-radius: 4px;
    border: 1px solid var(--grid-line);
}

.today-color { background-color: #fef2f2; border-color: var(--today-color); border-width: 2px; }
.weekend-color { background-color: #fff1f2; border-color: #be123c; }
.holiday-color { background-color: #e0f2fe; border-color: #0369a1; }