/* ============ Umrechnungstabelle Einheiten ============ */
/* ================= GRUNDLAYOUT ======================== */

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 20px;
    font-family: Arial, Helvetica, sans-serif;
    background: #f5f7fa;
    color: #222;
}

.flow-calculator {
    width: 100%;
    max-width: 850px;
    margin: 0 auto;
    padding: 25px;
    background: #fff;
    border: 1px solid #d5dbe2;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

/* ================= ÜBERSCHRIFT ======================== */

.flow-calculator h1 {
    margin: 0 0 10px 0;
    font-size: 28px;
    line-height: 1.25;
    color: #174a7c;
}

.flow-calculator .intro {
    margin-bottom: 22px;
    line-height: 1.5;
}

/* ================= GRUPPEN ============================ */

.flow-calculator .unit-group {
    margin-top: 25px;
}

.flow-calculator .unit-group h2 {
    margin: 0 0 10px 0;
    padding: 8px 10px;
    font-size: 18px;
    line-height: 1.3;
    color: #174a7c;
    background: #edf4fa;
    border-left: 4px solid #174a7c;
}

/* ================= EINHEITENZEILEN ==================== */

/* Gleiche Spaltenbreiten für alle Einheiten */

.flow-calculator .unit-row {
    display: grid;
    grid-template-columns: 250px minmax(0, 1fr);
    gap: 12px;
    align-items: center;
    margin: 7px 0;
}

.flow-calculator .unit-label {
    font-size: 15px;
    line-height: 1.3;
}

/* Alle Ein-/Ausgabefelder gleich breit und linksbündig */

.flow-calculator .unit-input {
    display: block;
    width: 100%;
    min-width: 0;
    height: 40px;
    padding: 7px 10px;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 16px;
    text-align: right;
    border: 1px solid #b8c2cc;
    border-radius: 5px;
    background: #fff;
    color: #222;
}

.flow-calculator .unit-input:focus {
    outline: none;
    border-color: #174a7c;
    box-shadow: 0 0 0 2px rgba(23, 74, 124, 0.12);
}

/* ================= BUTTONS ============================ */

.flow-calculator .button-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-start;
    gap: 10px;
    margin-top: 25px;
}

.flow-calculator .calc-button {
    display: inline-block;
    min-width: 150px;
    min-height: 42px;
    padding: 9px 20px;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 16px;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

.flow-calculator #copyButton {
    background: #174a7c;
}

.flow-calculator #copyButton:hover {
    background: #123b63;
}

.flow-calculator #clearButton {
    background: #555;
}

.flow-calculator #clearButton:hover {
    background: #333;
}

/* ================= KOPIERMELDUNG ====================== */

.flow-calculator #copyMessage {
    min-height: 20px;
    margin-top: 8px;
    font-size: 14px;
    text-align: left;
    color: #174a7c;
}

/* ================= INFORMATION ======================== */

.flow-calculator .info {
    margin-top: 20px;
    padding: 12px;
    font-size: 13px;
    line-height: 1.5;
    background: #f3f3f3;
    border-radius: 5px;
    color: #555;
}

/* ============== ZAHLENFORMAT-AUSWAHL ================== */
/* Ausschließlich innerhalb des Durchflussrechners */

.flow-calculator .format-selection {
    display: block;
    width: 100%;
    margin: 15px 0 20px;
    padding: 10px 12px;
    border: 1px solid #ccc;
    border-radius: 6px;
}

.flow-calculator .format-selection legend {
    padding: 0 5px;
    font-weight: bold;
}

.flow-calculator .format-selection label {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 8px 0;
    cursor: pointer;
    font-size: 14px;
    line-height: 1.4;
}

.flow-calculator .format-selection input[type="radio"] {
    display: inline-block;
    width: auto;
    min-width: 0;
    height: auto;
    margin: 0;
    padding: 0;
    flex: 0 0 auto;
    accent-color: #174a7c;
    box-shadow: none;
}

/* ================= TABLET ============================= */

@media (max-width: 700px) {

    body {
        padding: 12px;
    }

    .flow-calculator {
        padding: 18px;
    }

    .flow-calculator h1 {
        font-size: 24px;
    }

    .flow-calculator .unit-row {
        grid-template-columns: 210px minmax(0, 1fr);
    }
}

/* ================= SMARTPHONE ========================= */

@media (max-width: 560px) {

    body {
        padding: 8px;
    }

    .flow-calculator {
        padding: 14px;
        border-radius: 7px;
    }

    .flow-calculator h1 {
        font-size: 22px;
    }

    .flow-calculator .intro {
        font-size: 14px;
    }

    .flow-calculator .unit-group {
        margin-top: 20px;
    }

    .flow-calculator .unit-group h2 {
        font-size: 17px;
    }

    /* Bezeichnung und Eingabefeld untereinander */

    .flow-calculator .unit-row {
        display: block;
        margin: 10px 0 13px 0;
    }

    .flow-calculator .unit-label {
        display: block;
        margin-bottom: 4px;
        font-size: 14px;
        font-weight: 600;
    }

    /* Felder innerhalb jeder Gruppe identisch breit */

    .flow-calculator .unit-input {
        display: block;
        width: 100%;
        height: 42px;
        font-size: 16px;
    }

    /* Aktionsbuttons linksbündig und gleich breit */

    .flow-calculator .button-row {
        display: flex;
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .flow-calculator .calc-button {
        width: 100%;
        max-width: 100%;
    }

    .flow-calculator #copyMessage {
        text-align: left;
    }

    .flow-calculator .format-selection label {
        align-items: flex-start;
    }

    .flow-calculator .format-selection input[type="radio"] {
        margin-top: 3px;
    }
}

/* ============ SEHR KLEINE SMARTPHONES ================ */

@media (max-width: 360px) {

    .flow-calculator {
        padding: 10px;
    }

    .flow-calculator h1 {
        font-size: 20px;
    }

    .flow-calculator .unit-group h2 {
        font-size: 16px;
    }
}

/* ============ ENDE EINHEITENRECHNER ================== */


/* =====================================================
   7-SPALTIGES GRID – UMRECHNUNGSFAKTOREN
   ===================================================== */

.grid-7Sp-wrapper {
    width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
}

/* ================= GRID ============================== */

.grid-7Sp {
    display: grid;
    grid-template-columns:
        max-content
        max-content
        max-content
        35px
        max-content
        max-content
        max-content;
    width: max-content;
    min-width: 100%;
    /*border: 1px solid #999;  äußeren Rahmen entfernt*/
    background: #fff;
    font-size: 14px;
}

/* ================= NORMALE ZELLEN ==================== */

.grid-7Sp > div {
    padding: 6px 8px;
    background: #fff;
    white-space: nowrap;
    text-align: left;
    line-height: 1.3;
    border: 1px solid #999;
}

/* ================= KOPFZEILE ========================= */

.grid-7Sp .headline {
    font-weight: bold;
    background-color: #f2f2f2;
    text-align: center;
}

/* ================= BEREICHSÜBERSCHRIFT ============== */

.grid-7Sp .section-head {
    grid-column: 1 / -1 !important;
    padding: 7px 10px;
    font-weight: bold;
    text-align: left;
    background-color: #e6e6e6;
    border: 1px solid #999 !important;
    white-space: normal;
}

/* ================= SPALTE 4: TRENNSPALTE ============ */

.grid-7Sp .spalte4 {
    border: none !important;
    background-color: #fff;
}

/* ================= SPALTE 3 ========================= */

.grid-7Sp .spalte3 {
    border-right: 1px solid #999 !important;
}

/* ================= SPALTE 5 ========================= */

.grid-7Sp .spalte5 {
    border-left: 1px solid #999 !important;
}

/* ================= GRID MOBILE ======================= */

@media (max-width: 600px) {

    .grid-7Sp {
        min-width: 700px;
        width: max-content;
    }

    .grid-7Sp > div {
        padding: 6px 8px;
    }

    .grid-7Sp .section-head {
        padding: 7px 10px;
    }
}

/* ============ ENDE GRID 7 SPALTEN =================== */