:root {
    --bg-color: #f4f4f9;
    --container-bg: #ffffff;
    --text-color: #333333;
    --border-color: #dddddd;
    --accent-color: #007bff;
    --accent-hover: #0056b3;
    --danger-color: #dc3545;
    --danger-hover: #a71d2a;
    --warning-color: #e67e22;
    --warning-hover: #d35400;
    --canvas-bg: #f8f9fa;
    --pink-color: #e91e62;
    --pink-hover: #c2185b;
}

body.dark-mode {
    --bg-color: #121212;
    --container-bg: #1e1e1e;
    --text-color: #e0e0e0;
    --border-color: #444444;
    --accent-color: #339af0;
    --accent-hover: #1c7ed6;
    --canvas-bg: #2a2a2a;
}

* {
    box-sizing: border-box;
    transition: background-color 0.2s, color 0.2s;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 20px;
    line-height: 1.6;
}

.container {
    max-width: 1000px;
    margin: auto;
    background: var(--container-bg);
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 15px;
}

.settings-group {
    display: flex;
    gap: 20px;
    align-items: center;
}

.toggle-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: bold;
    font-size: 14px;
}

button {
    background-color: var(--accent-color);
    color: white;
    border: none;
    padding: 10px 18px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    transition: background-color 0.2s;
}

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

button.danger {
    background-color: var(--danger-color);
}

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

button.secondary {
    background-color: #6c757d;
}

button.secondary:hover {
    background-color: #5a6268;
}

button.warning {
    background-color: var(--warning-color);
    color: white;
}

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

button.pink {
    background-color: var(--pink-color);
}

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

button.success {
    background-color: #28a745;
    color: white;
}

button.success:hover {
    background-color: #218838;
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed !important;
    pointer-events: none;
}

.section {
    border: 1px solid var(--border-color);
    padding: 20px;
    margin-bottom: 25px;
    border-radius: 8px;
}

.full-width-slider {
    width: 100%;
    margin: 15px 0;
    cursor: pointer;
}

.controls-row {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}

.filter-row {
    display: grid;
    grid-template-columns: 60px 140px 1fr 1fr 1fr 110px;
    gap: 12px;
    align-items: end;
    background: var(--bg-color);
    padding: 12px;
    border-radius: 6px;
    margin-bottom: 10px;
    border: 1px solid var(--border-color);
}

input[type="number"],
select {
    width: 100%;
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--container-bg);
    color: var(--text-color);
}

input[type="file"] {
    padding: 5px;
    background: var(--bg-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    width: 100%;
}

input:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: #eee;
}

canvas {
    width: 100%;
    height: 350px;
    background-color: var(--canvas-bg);
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 22px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked+.slider {
    background-color: var(--accent-color);
}

input:checked+.slider:before {
    transform: translateX(22px);
}

.action-bar {
    display: flex;
    justify-content: space-between;
    margin-bottom: 15px;
    gap: 10px;
    flex-wrap: wrap;
}

.mode-icon {
    font-size: 1.2em;
    cursor: pointer;
    user-select: none;
    transition: transform 0.3s ease;
}

.dark-mode .mode-icon {
    transform: rotate(360deg);
}

.warning-box {
    margin-top: 20px;
    padding: 15px;
    background-color: rgba(220, 53, 69, 0.1);
    border: 1px solid var(--danger-color);
    border-radius: 8px;
    color: var(--danger-color);
    font-weight: bold;
    font-size: 0.9em;
    line-height: 1.4;
    display: flex;
    align-items: center;
    gap: 10px;
}

.generator-box {
    background-color: rgba(0, 0, 0, 0.03);
    border: 1px dashed var(--border-color);
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 15px;
}

.dark-mode .generator-box {
    background-color: rgba(255, 255, 255, 0.03);
}

.dark-mode #infoSection button {
    color: var(--accent-color) !important;
}

#infoSection button:hover {
    transform: scale(1.2);
    transition: transform 0.2s;
}

#showInfoBtn {
    color: white;
    font-weight: bold;
    font-family: serif;
    cursor: pointer;
    border: none;
    transition: transform 0.2s, background-color 0.2s;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

#showInfoBtn:hover {
    transform: scale(1.1);
    background-color: var(--accent-hover);
}

a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: bold;
}

a:hover {
    text-decoration: underline;
}

footer {
    text-align: center;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    font-size: 0.9em;
}

.share-box {
    display: none;
    background-color: rgba(40, 167, 69, 0.1);
    border: 1px solid #28a745;
    border-radius: 8px;
    padding: 15px;
    margin-top: 15px;
}

.dark-mode .share-box {
    background-color: rgba(40, 167, 69, 0.05);
}

.modal-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.85);
    display: none; /* Standardmäßig aus */
    justify-content: center;
    align-items: center;
    z-index: 10000;
    backdrop-filter: blur(5px);
}

.modal-content {
    background: var(--container-bg);
    color: var(--text-color);
    padding: 30px;
    margin: 80px;
    border-radius: 12px;
    max-width: 500px;
    text-align: center;
    box-shadow: 0 20px 50px rgba(0,0,0,0.5);
    border: 1px solid var(--border-color);
}

.modal-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 25px;
}

@media (max-width: 750px) {
    .filter-row {
        /* Auf mobilen Geräten wird das Grid in eine Spalten‑Reihenfolge gebracht */
        display: flex;
        flex-direction: column;          /* Elemente untereinander */
        gap: 2px;                        /* Abstand zwischen den Zeilen */
        align-items: stretch;            /* volle Breite nutzen */
    }

    /* --- Generator‑Box Controls für mobile Geräte --- */
    .generator-box > .controls-row {
        flex-direction: column;          /* Buttons untereinander */
        align-items: stretch;            /* volle Breite nutzen */
        gap: 8px;
    }

    /* Trennlinie entfernen (Border‑Left) */
    .generator-box > .controls-row > div[style*="border-left"] {
        border-left: none !important;
        margin-left: 0 !important;
        padding-left: 0 !important;
    }

    /* Sweep‑Buttons gleich hohe Höhe geben und zentrieren */
    .generator-box > .controls-row button.secondary {
        flex: 1;                         /* gleicher Anteil an Breite */
        min-height: 40px;                /* feste Mindesthöhe */
        display: flex;
        align-items: center;
        justify-content: center;
    }

    /* Sinus‑Button zentrieren, wenn Trenner entfernt ist */
    .generator-box > .controls-row button#btnSine {
        margin-left: auto;
        margin-right: auto;
        width: 100%;
        text-align: center;
    }
}

/* ----------------------------------------------------------
Sichtbarkeit des Warning-Overlays bei sehr kleinen Bildschirmen
---------------------------------------------------------- */
@media (max-width: 416px) {
    #warningModal {
        display: flex !important;
    }

    #warningModalContent {
        max-width: 90%;
    }
}