/***********************************
 * RESET & GRUNDLAYOUT
 ***********************************/
* {
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    font-size: 16px;
    margin: 0;
    padding: 0;
    color: #000;
}

img {
    max-width: 100%;
    height: auto;
}

/***********************************
 * FORMULAR – FLEXBASIERTE REIHEN
 ***********************************/
.form-grid {
    display: grid;
    grid-template-columns: 1fr; /* jede Zeile untereinander */
    gap: 10px;
    max-width: 100%;
}

.form-row {
    display: flex;
    align-items: center;
    gap: 6px;           /* Abstand Label-Input-Unit */
    flex-wrap: nowrap;   /* kein Umbruch */
    min-width: 0;        /* für flex-shrink */
}

.form-row label {
    flex: 0 0 auto;      /* Label behält natürliche Breite */
    min-width: 100px;
    max-width: 200px;    /* Label nie zu breit ist 150px*/
    text-align: left;
    font-weight: normal;
    white-space: nowrap;
}

.form-row input {
    flex: 0 1 120px;      /* Input schrumpft, max 80px Basis */
    min-width: 40px;     /* Mindestbreite */
    max-width: 120px;    /* nicht zu breit auf großen Screens */
    padding: 5px 6px;
    font-size: 1rem;
}

.form-row .unit {
    flex: 0 0 auto;      /* Einheit behält Breite */
    white-space: nowrap;
    color: #555;
}

/* Abschnittsüberschrift */
.form-section {
    font-weight: bold;
    margin-top: 14px;
    padding-top: 6px;
    border-top: 1px solid #ccc;
}

/***********************************
 * BERECHNUNGSTABELLE
 ***********************************/
.calc-grid {
    display: grid;
    grid-template-columns: 90px repeat(4, minmax(90px, 1fr));
    margin-top: 24px;
    border: 2px solid #333;
}

.calc-grid .headerBsp {
    font-weight: bold;
    text-align: center;
    padding: 8px 4px;
    background: #f0f0f0;
    border-right: 2px solid #333;
    border-bottom: 2px solid #333;
}

.calc-grid .header-top {
    background: #e6e6e6;
}

.calc-grid input {
    width: 100%;
    padding: 6px;
    text-align: center;
    border-right: 2px solid #333;
    border-bottom: 2px solid #333;
    border-top: none;
    border-left: none;
}

.calc-grid > *:nth-child(5n) {
    border-right: none;
}

.readonly {
    background-color: #eee;
}

.span-2 {
    grid-column: span 2;
}

.calc-grid select {
    width: 100%;
    border: none;
    background: transparent;
    font: inherit;
    text-align: center;
    cursor: pointer;
}

/***********************************
 * RESPONSIVE – TABLET
 ***********************************/
@media (max-width: 1024px) {
    .calc-grid {
        grid-template-columns: 80px repeat(4, minmax(70px, 1fr));
        font-size: 14px;
    }

    .form-row input {
        flex: 0 1 90px; /* Input kleiner alt 70px*/
    }
}

/***********************************
 * RESPONSIVE – MOBILE
 ***********************************/
@media (max-width: 768px) {
    .form-row input {
        flex: 0 1 90px;  /* noch kleiner alt 60px*/
        font-size: 0.9rem;
    }

    .calc-grid {
        grid-template-columns: 65px repeat(4, 1fr);
        font-size: 13px;
    }
}

/***********************************
 * RESPONSIVE – SEHR KLEINE SCREENS
 ***********************************/
@media (max-width: 480px) {
    .form-row input {
        flex: 0 1 80px;  /* Input schrumpft weiter alt 50px*/
        font-size: 0.85rem;
    }

    .calc-grid {
        grid-template-columns: 60px repeat(4, 1fr);
    }

    .calc-grid .headerBsp {
        font-size: 12px;
    }
}

/***********************************
 * PRINT / A4
 ***********************************/
.print-header {
    display: none;
}

@media print {
    @page {
        size: A4 portrait;
        margin: 10mm;
    }

    body {
        font-size: 9px;
        line-height: 1.2;
    }

    .print-header {
        display: block;
        text-align: center;
        margin-bottom: 6px;
        padding-bottom: 4px;
        border-bottom: 1px solid #000;
    }

    .print-header img {
        max-height: 32px;
        margin-bottom: 4px;
    }

    .print-header h1 {
        font-size: 12px;
        margin: 2px 0;
    }

    .print-header p {
        font-size: 9px;
        margin: 0;
    }

    button, select, .no-print {
        display: none !important;
    }

    /* Formular Print */
    .form-row input {
        flex: 0 1 60px;  /* Input kleiner, immer nebeneinander */
        font-size: 9px;
    }

    .calc-grid {
        grid-template-columns: 65px repeat(4, 80px);
        font-size: 9px;
        margin-top: 6px;
        border: 1px solid #000;
    }

    .calc-grid .headerBsp {
        padding: 3px 2px;
        border-right: 1px solid #000;
        border-bottom: 1px solid #000;
        background: #fff;
    }

    .calc-grid input {
        padding: 2px;
        border-right: 1px solid #000;
        border-bottom: 1px solid #000;
        background: transparent;
        text-align: center;
        font-size: 9px;
    }

    .calc-grid > *:nth-child(5n) {
        border-right: none;
    }

    .readonly {
        background: transparent;
    }
    /*ergänzt*/
    .print-footer {
    display: block; 
    position: fixed;
    bottom: 6mm;
    left: 0;
    right: 0;
    font-size: 9px;
    text-align: center;
    border-top: 1px solid #000;
    padding-top: 3px;
  }

    #printArea,
    .form-grid,
    .calc-grid {
        page-break-inside: avoid;
    }
}