/* Farbvariablen */
:root {
    --primary-color: #ff4d4d;
    --primary-hover: #ff7c7c;
    --background-color: #eee;
    --text-color: #333;
    --error-bg: #f8d7da;
    --error-text: #721c24;
    --error-border: #f5c6cb;
    --success-bg: #d4edda;
    --success-text: #155724;
    --success-border: #c3e6cb;
}

/* General */
body {
    font-family: sans-serif;
    max-width: 1000px;
    margin: 20px auto;
    padding: 20px;
    color: var(--text-color);
    box-sizing: border-box;
}

*,
*::before,
*::after {
    box-sizing: inherit;
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
    background: white;
}

th, td {
    border: 1px solid #ddd;
    padding: 8px;
    text-align: left;
}

th {
    background-color: #f2f2f2;
}

/* Container & Layout */
.container {
    max-width: 400px;
    margin: 20px auto;
    font-family: sans-serif;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.header h1 {
    margin: 0;
    line-height: 1.2;
}

.header-icons {
    white-space: nowrap;
}

.header-icons a,
.header-icons a:visited {
    color: black !important;
    text-decoration: none;
    white-space: nowrap;
}

.header-icons a:hover {
    color: var(--primary-color) !important;
}

.box {
    background: var(--background-color);
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 20px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    margin: 20px 0;
}

.stat-tile {
    background: white;
    border: 1px solid #ddd;
    border-radius: 5px;
    padding: 14px;
}

.stat-tile span {
    display: block;
    color: #666;
    font-size: 0.95rem;
    margin-bottom: 6px;
}

.stat-tile strong {
    display: block;
    font-size: 1.6rem;
    line-height: 1.2;
}

.stat-tile--positive strong {
    color: green;
}

.stat-tile--negative strong {
    color: red;
}

/* Forms & Inputs */
input {
    width: 100%;
    padding: 8px;
    margin: 8px 0;
    box-sizing: border-box;
}

.balance {
    width: 120px;
    padding: 8px;
    margin: 8px 0;
    box-sizing: border-box;
}

button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 15px;
    cursor: pointer;
    min-height: 40px;
    border-radius: 4px;
}

button:hover {
    background-color: var(--primary-hover);
}

.topup-form {
    display: flex;
    align-items: center;
    gap: 8px;
}

.topup-form .balance {
    margin: 0;
}

.action-group {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

.action-group form {
    display: inline-flex;
    margin: 0;
}

.action-group button {
    width: 42px;
    padding: 10px;
}

/* Alerts */
.alert {
    padding: 10px;
    margin-bottom: 15px;
    border-radius: 4px;
}

.error {
    background-color: var(--error-bg);
    color: var(--error-text);
    border: 1px solid var(--error-border);
}

.success {
    background-color: var(--success-bg);
    color: var(--success-text);
    border: 1px solid var(--success-border);
}

/* Links */
.back-link {
    display: block;
    margin-top: 15px;
    color: var(--text-color);
    font-size: 0.9em;
}

@media (max-width: 700px) {
    body {
        max-width: none;
        margin: 0;
        padding: 12px;
    }

    .header {
        align-items: flex-start;
        flex-direction: column;
    }

    .header h1 {
        font-size: 1.35rem;
    }

    .box {
        padding: 12px;
    }

    .stats-grid {
        gap: 8px;
        margin: 16px 0;
    }

    .stat-tile {
        padding: 10px;
    }

    .stat-tile strong {
        font-size: 1.25rem;
    }

    .box form {
        display: grid;
        gap: 8px;
    }

    input,
    button {
        font-size: 1rem;
    }

    table,
    tbody,
    tr,
    th,
    td {
        display: block;
        width: 100%;
    }

    table {
        border-collapse: separate;
        border-spacing: 0;
        background: transparent;
    }

    tr:first-child {
        display: none;
    }

    tr {
        background: white;
        border: 1px solid #ddd;
        border-radius: 5px;
        margin-bottom: 12px;
        padding: 8px;
    }

    td {
        border: none;
        display: grid;
        grid-template-columns: minmax(95px, 35%) 1fr;
        gap: 10px;
        align-items: center;
        padding: 8px 4px;
        overflow-wrap: anywhere;
    }

    td::before {
        content: attr(data-label);
        color: #666;
        font-weight: bold;
    }

    .topup-form {
        align-items: stretch;
        display: grid;
        grid-template-columns: 1fr auto;
        width: 100%;
    }

    .topup-form .balance {
        width: 100%;
    }

    .action-group {
        gap: 8px;
    }

    .users-table {
        margin-top: 12px;
    }

    .users-table tr {
        margin-bottom: 8px;
        padding: 6px;
    }

    .users-table td {
        grid-template-columns: minmax(78px, 30%) 1fr;
        gap: 6px;
        padding: 5px 3px;
        font-size: 0.95rem;
    }

    .users-table .topup-form {
        gap: 6px;
    }

    .users-table .balance {
        min-height: 38px;
        padding: 6px;
    }

    .users-table button {
        min-height: 38px;
        padding: 8px 10px;
    }

    .action-group button {
        width: 46px;
        min-height: 44px;
    }

    .users-table .action-group {
        gap: 6px;
    }

    .users-table .action-group button {
        width: 38px;
        min-height: 38px;
        padding: 8px;
    }

    .transactions-table {
        margin-top: 12px;
    }

    .transactions-table tr {
        margin-bottom: 7px;
        padding: 5px 6px;
    }

    .transactions-table td {
        grid-template-columns: minmax(62px, 26%) 1fr;
        gap: 6px;
        padding: 4px 2px;
        font-size: 0.92rem;
    }

    .transactions-table td::before {
        font-size: 0.85rem;
    }
}

@media (max-width: 420px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }

    td {
        grid-template-columns: 1fr;
        gap: 4px;
    }

    .users-table td {
        grid-template-columns: minmax(70px, 28%) 1fr;
    }

    .transactions-table td {
        grid-template-columns: minmax(58px, 25%) 1fr;
    }

    .topup-form {
        grid-template-columns: 1fr;
    }

    .users-table .topup-form {
        grid-template-columns: 1fr auto;
    }

    .topup-form button {
        width: 100%;
    }

    .users-table .topup-form button {
        width: auto;
    }
}