/* ============================================
   Kalkulations-Apps CSS
   Separate Stylesheet für Vorwärts-, Rückwärts- und Differenzkalkulation
   ============================================ */

/* Container */
.kalkulation-app-container {
    width: 100%;
    max-width: 100%;
    margin: 0 auto;
    padding: 2rem;
    background: var(--bg-primary, #ffffff);
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    box-sizing: border-box;
}

/* Header */
.kalkulation-app-header {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 2px solid var(--border-color, #e5e7eb);
}

.kalkulation-app-header h2 {
    color: var(--primary-color, #6366f1);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.kalkulation-app-description {
    font-size: 1.1rem;
    color: var(--text-secondary, #6b7280);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.kalkulation-given-values {
    background: var(--bg-secondary, #f9fafb);
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid var(--primary-color, #6366f1);
    margin-bottom: 2rem;
}

.kalkulation-given-values p {
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.kalkulation-given-values .highlight {
    color: var(--primary-color, #6366f1);
    font-weight: 700;
    font-size: 1.1rem;
}

/* Tabelle */
.kalkulation-table-wrapper {
    width: 100%;
    overflow-x: auto;
    margin-bottom: 2rem;
    box-sizing: border-box;
}

.kalkulation-table {
    width: 100%;
    min-width: 100%;
    border-collapse: collapse;
    background: var(--bg-primary, #ffffff);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    table-layout: auto;
}

.kalkulation-table thead {
    background: var(--primary-color, #6366f1);
}

.kalkulation-table th {
    color: white;
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.95rem;
}

.kalkulation-table th:nth-child(1) {
    min-width: 200px;
    width: 50%;
}

.kalkulation-table th:nth-child(2) {
    min-width: 120px;
    width: 20%;
    text-align: center;
}

.kalkulation-table th:nth-child(3) {
    min-width: 150px;
    width: 30%;
    text-align: right;
}

.kalkulation-table tbody tr {
    transition: background-color 0.2s ease;
    border-bottom: 1px solid var(--border-color, #e5e7eb);
}

.kalkulation-table tbody tr:last-child {
    border-bottom: none;
}

.kalkulation-table tbody tr:hover {
    background-color: var(--bg-secondary, #f9fafb);
}

.kalkulation-table tbody tr.highlighted-row {
    background-color: rgba(251, 191, 36, 0.1);
    border-left: 3px solid var(--accent-color, #fbbf24);
}

.kalkulation-table tbody tr.result-row {
    background-color: rgba(16, 185, 129, 0.1);
    border-left: 3px solid var(--success-color, #10b981);
    font-weight: 600;
}

.kalkulation-table tbody tr.result-row td {
    border-top: 2px solid var(--success-color, #10b981);
}

.kalkulation-table tbody tr.separator-row {
    border: none;
}

.kalkulation-table tbody tr.separator-row td {
    padding: 1rem 0;
    border: none;
}

.kalkulation-table tbody tr.separator-row hr {
    border: none;
    height: 2px;
    background: var(--border-color, #e5e7eb);
    margin: 0;
}

.kalkulation-table td {
    padding: 0.75rem 1rem;
    vertical-align: middle;
}

.kalkulation-table td:nth-child(1) {
    font-size: 0.95rem;
    color: var(--text-primary, #111827);
    line-height: 1.5;
}

.kalkulation-table td:nth-child(2) {
    text-align: center;
    color: var(--text-secondary, #6b7280);
    font-weight: 500;
    font-size: 0.9rem;
}

.kalkulation-table td:nth-child(3) {
    text-align: right;
}

/* Input-Felder */
.kalkulation-input {
    width: 100%;
    min-width: 120px;
    padding: 0.5rem 0.75rem;
    border: 2px solid var(--border-color, #e5e7eb);
    border-radius: 6px;
    background: var(--bg-primary, #ffffff);
    color: var(--text-primary, #111827);
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.2s ease;
    text-align: right;
    box-sizing: border-box;
}

.kalkulation-input:focus {
    outline: none;
    border-color: var(--primary-color, #6366f1);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.kalkulation-input.correct {
    border-color: var(--success-color, #10b981);
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success-color, #10b981);
}

.kalkulation-input.incorrect {
    border-color: var(--danger-color, #ef4444);
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--danger-color, #ef4444);
}

.kalkulation-input.readonly {
    background-color: var(--bg-tertiary, #f3f4f6) !important;
    color: var(--text-muted, #9ca3af) !important;
    cursor: not-allowed;
    border-color: var(--border-light, #d1d5db) !important;
}

.kalkulation-input.result {
    font-weight: 700;
    font-size: 1rem;
}

/* Controls */
.kalkulation-controls {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.kalkulation-btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.kalkulation-btn-primary {
    background: var(--primary-color, #6366f1);
    color: white;
}

.kalkulation-btn-primary:hover {
    background: var(--primary-color-dark, #4f46e5);
    transform: translateY(-1px);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.kalkulation-btn-secondary {
    background: var(--bg-secondary, #f9fafb);
    color: var(--text-primary, #111827);
    border: 2px solid var(--border-color, #e5e7eb);
}

.kalkulation-btn-secondary:hover {
    background: var(--bg-tertiary, #f3f4f6);
    border-color: var(--primary-color, #6366f1);
}

/* Feedback */
.kalkulation-feedback {
    margin-top: 2rem;
    padding: 1.5rem;
    border-radius: 8px;
    background: var(--bg-secondary, #f9fafb);
    border: 1px solid var(--border-color, #e5e7eb);
}

.kalkulation-feedback.success {
    background: rgba(16, 185, 129, 0.1);
    border-color: var(--success-color, #10b981);
    color: var(--success-color, #10b981);
}

.kalkulation-feedback.error {
    background: rgba(239, 68, 68, 0.1);
    border-color: var(--danger-color, #ef4444);
    color: var(--danger-color, #ef4444);
}

.kalkulation-feedback h4 {
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.kalkulation-solution {
    margin-top: 1.5rem;
    padding: 1.5rem;
    background: var(--bg-primary, #ffffff);
    border-radius: 8px;
    border: 1px solid var(--border-color, #e5e7eb);
}

.kalkulation-solution h5 {
    margin-bottom: 1rem;
    color: var(--primary-color, #6366f1);
    font-size: 1.1rem;
}

.kalkulation-solution-step {
    margin-bottom: 0.75rem;
    padding: 0.5rem;
    background: var(--bg-secondary, #f9fafb);
    border-radius: 4px;
    font-size: 0.9rem;
}

.kalkulation-solution-step strong {
    color: var(--primary-color, #6366f1);
}

/* Statistics */
.kalkulation-statistics {
    background: var(--bg-secondary, #f9fafb);
    border: 1px solid var(--border-color, #e5e7eb);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.kalkulation-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
}

.kalkulation-stat-item {
    text-align: center;
    padding: 0.75rem;
    background: var(--bg-primary, #ffffff);
    border-radius: 6px;
    border: 1px solid var(--border-color, #e5e7eb);
}

.kalkulation-stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary, #6b7280);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.kalkulation-stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color, #6366f1);
}

/* Responsive */
@media (max-width: 768px) {
    .kalkulation-app-container {
        padding: 1rem;
    }
    
    .kalkulation-app-header h2 {
        font-size: 1.5rem;
    }
    
    .kalkulation-table {
        font-size: 0.9rem;
    }
    
    .kalkulation-table th,
    .kalkulation-table td {
        padding: 0.5rem 0.75rem;
    }
    
    .kalkulation-input {
        font-size: 0.9rem;
        padding: 0.4rem 0.6rem;
    }
    
    .kalkulation-controls {
        flex-direction: column;
    }
    
    .kalkulation-btn {
        width: 100%;
        justify-content: center;
    }
}

/* Dark Mode Support */
[data-theme="dark"] .kalkulation-app-container {
    --bg-primary: #1f2937;
    --bg-secondary: #111827;
    --bg-tertiary: #374151;
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --text-muted: #9ca3af;
    --border-color: #374151;
    --border-light: #4b5563;
}

[data-theme="dark"] .kalkulation-table {
    background: var(--bg-primary);
}

[data-theme="dark"] .kalkulation-input {
    background: var(--bg-primary);
    color: var(--text-primary);
    border-color: var(--border-color);
}

[data-theme="dark"] .kalkulation-input.readonly {
    background-color: var(--bg-tertiary) !important;
    color: var(--text-muted) !important;
}