/* Globale Einstellungen */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    min-height: 100vh;
    font-family: "Varela Round", "Arial Rounded MT Bold", "Helvetica Rounded", Arial, sans-serif;
    background-color: #E7D7C1;
    color: #735751;
    line-height: 1.8;
    
    display: grid;
    grid-template-columns: 1fr;
    grid-template-rows: auto auto 1fr auto;
}

header {
    grid-row: 2;
    text-align: center;
    background-color: #8C1C13;
    color: white;
    padding: 2rem;
    margin-top: 4rem;
}

header h1, h1, h2, h3, h4, h5, h6 {
    font-family: "Quicksand", "Segoe UI", sans-serif;
    font-weight: 700;
}

header h1 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

nav {
    grid-row: 1;
    background-color: #BF4342;
    padding: 1.2rem;
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    height: 4rem;
    display: flex;
    align-items: center;
}

.hamburger {
    display: block;
    background: none;
    border: none;
    cursor: pointer;
    padding: 1rem;
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1001;
    background-color: rgba(191, 67, 66, 0.95);
    border-radius: 4px;
}

.hamburger-line {
    display: block;
    width: 25px;
    height: 2px;
    background-color: white;
    margin: 5px 0;
    transition: transform 0.3s ease;
}

.hamburger.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.hamburger.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

.nav-list {
    display: none;
    flex-direction: column;
    align-items: center;
    list-style: none;
    gap:0;
    margin: 0;
    padding: 0;
    background-color: #BF4342;
    position: absolute;
    top: 2rem;
    left: 0;
    width: 100%;
}

.nav-list.active {
    display: flex;
}

.nav-list li {
    width: 100%;
    text-align: center;
    border-bottom: 1px solid #8C1C13; /* Trennlinie zwischen Menüpunkten */
}

.nav-list li:last-child {
    border-bottom: none; /* Keine Trennlinie beim letzten Punkt */
}

.nav-list li a {
    text-decoration: none;
    color: white;
    font-weight: bold;
    font-size: 1.1rem;
    padding: 0.8rem 1.2rem;
    display: block;
}

.nav-list li a:hover {
    background-color: #8C1C13; /* Hover-Effekt */
}

main {
    grid-row: 3;
    display: grid;
    grid-template-columns: 1fr;
    padding: 1rem;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

/* Gemeinsames Styling für alle Hauptinhalte */
main > * {
    background-color: rgba(255, 255, 255, 0.7);
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    padding: 2rem;
    width: 100%;
    margin-bottom: 3rem;
}

main > *:last-child {
    margin-bottom: 0;
}

/* Section Abstände */
main section {
    margin-top: 0.5rem;
    margin-bottom: 1rem;
}

.quiz-container {
    display: grid;
    grid-template-columns: 1fr;
    grid-row-gap: 1rem;
    max-width: 800px;
    margin: 0 auto;
    padding: 1rem;
}

#quiz-selection {
    padding: 2rem;
    max-width: 800px;
    margin: 0 auto;
    height: fit-content;
}

#quiz-selection h2 {
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    text-align: center;
}

button {
    padding: 0.5rem 1rem;
    font-size: 1rem;
    background-color: #BF4342;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.button-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-width: 600px;
    margin: 0 auto;
}

.button-container button {
    padding: 1rem 2rem;
    font-size: 1.2rem;
    background-color: #BF4342;
    color: white;
    border: none;
    border-radius: 5px;
}

.topic-container {
    display: grid;
    grid-template-columns: 1fr;
    grid-row-gap: 1rem;
    padding: 1rem;
    width: 100%;
    margin: 0 auto;
}

.topics-list {
    display: grid;
    grid-template-columns: 1fr;
    padding-left: 1.2rem;
    margin-left: 0.3rem;
    margin-top: 0.8rem;
    line-height: 1.4;
    list-style: disc;
}

.topics-list > * {
    margin-bottom: 0.4rem;
}

#quiz-questions {
    background-color: white;
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    height: fit-content;
}

#quiz-results {
    height: fit-content;
}

.options-list {
    list-style: none;
    padding: 0;
}

.option-item {
    margin: 0.5rem 0;
    padding: 0.5rem;
    border-radius: 4px;
    transition: background-color 0.3s ease;
}

input[type="radio"] {
    appearance: none;
    width: 16px;
    height: 16px;
    border: 2px solid #BF4342;
    border-radius: 50%;
    margin-right: 10px;
    position: relative;
    top: 2px;
    opacity: 0.7;
}

input[type="radio"]:checked {
    background-color: #BF4342;
    opacity: 0.8;
}

input[type="radio"]:checked::after {
    content: '';
    width: 6px;
    height: 6px;
    background-color: white;
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

/* Antwortfeedback Farben */
.correct {
    background-color: rgba(200, 230, 201, 0.2);
    border: 1px solid rgba(200, 230, 201, 0.4);
}

.incorrect {
    background-color: rgba(255, 182, 193, 0.3);
    border: 1px solid rgba(255, 182, 193, 0.5);
}

.correct::before,
.incorrect::before {
    margin-right: 8px;
    font-weight: normal;
    opacity: 0.7;
}

.correct::before {
    content: '✓';
    color: #81C784;
}

.incorrect::before {
    content: '×';
    color: #C62828;
}

/* Antwortfeedback Farben */
.quiz-correct {
    color: #81A594;
}

.quiz-incorrect {
    color: #C77B7B;
}

.quiz-correct small,
.quiz-incorrect small {
    color: #735751;  /* Zurück zur Standard-Textfarbe für Erklärungen */
    display: block;
    margin-top: 5px;
    font-style: italic;
}

footer {
    grid-row: 4;
    text-align: center;
    padding: 1rem;
    background-color: #8C1C13;
    color: white;
}

.grid-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.grid-item {
    padding: 1.5rem;
    background: #E7D7C1;
    border: 1px solid #BF4342;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.grid-item h3 {
    hyphens: auto;
    word-break: break-word;
    margin-bottom: 1rem;
}

.highlights-section {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    justify-content: flex-start;
    margin-top: 0.5rem;
    padding: 1rem;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.highlight {
    flex: 100%;
    padding: 1.5rem;
    margin: 0 1rem;
    background-color: #BF4342;
    color: white;
    border-radius: 8px;
    box-sizing: border-box;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin-bottom: 1rem;
}

.highlight h2 {
    text-align: left;
    margin-left: 0;
    color: white;
}

.highlight h3 {
    margin-bottom: 0.5rem;
    color: #E7D7C1;
}

.experiment-section {
    margin-bottom: 2rem;
    padding: 1rem;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.experiment-section h2 {
    color: #8C1C13;
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.experiment-section h3 {
    color: #BF4342;
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.experiment-section ul, .experiment-section ol {
    padding-left: 1.5rem;
    margin-bottom: 1rem;
}

.experiment-section ul li, .experiment-section ol li {
    margin-bottom: 0.5rem;
}

.experiment-result {
    display: none;
    color: #8C1C13;
    margin-top: 1rem;
    font-weight: bold;
}

.result-image {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    margin: 1rem 0;
}

.topic-box {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    padding: 0.8rem;
    margin-bottom: 0.8rem;
}

.topic-box h2 {
    color: #8C1C13;
    font-family: "Quicksand", "Segoe UI", sans-serif;
    font-weight: 700;
    margin-bottom: 0.8rem;
    font-size: 1.4rem;
}

.example-text {
    display: flex;
    flex-direction: column;
    background-color: #F5EBE0;
    padding: 0.8rem;
    margin: 0.8rem 0;
    border-radius: 4px;
}

.formula-text {
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: bold;
    padding: 0.8rem;
    margin: 0.8rem 0;
    background-color: #E7D7C1;
    border-radius: 4px;
    min-height: 3rem;
}

.fact-list {
    display: grid;
    grid-template-columns: 1fr;
    grid-row-gap: 0.4rem;
    padding-left: 1.2rem;
    margin-left: 0.3rem;
    margin-top: 0.8rem;
    line-height: 1.4;
    list-style: disc;
}

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

@media (min-width: 768px) {
    main {
        max-width: 720px;
        padding: 1rem;
    }

    .button-container {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
        gap: 1.5rem;
    }

    .button-container button {
        flex: 0 1 300px;
        min-width: 200px;
        max-width: 250px;
    }

    .button-container button:hover {
        background-color: #8C1C13;
    }

    .topic-container {
        grid-template-columns: repeat(2, 1fr);
        grid-column-gap: 1.5rem;
        padding: 1.5rem;
    }

    .topic-box {
        margin-bottom: 1.5rem;
    }

    header {
        padding: 1.5rem;
        margin-top: 4rem;
    }

    header h1 {
        font-size: 2.2rem;
    }

    /* Verstecken bei Desktop View */
    .hamburger {
        display: none;
    }

    nav {
        padding: 1rem;
    }

    .nav-list {
        display: flex;
        flex-direction: row;
        justify-content: center;
        position: static;
        gap: 1.5rem;
        padding: 0;
    }

    .nav-list li {
        width: auto;
        border-bottom: none;
        position: relative;
    }

    .nav-list li:not(:last-child)::after {
        display: block;
        content: "";
        position: absolute;
        top: 50%;
        right: -0.5rem;
        transform: translateY(-50%);
        width: 1px;
        height: 1.5rem;
        background-color: white;
    }

    .grid-container {
        grid-template-columns: repeat(2, 1fr);
    }

    #quiz-selection {
        padding: 1.5rem;
        height: fit-content;
    }

    #quiz-questions {
        height: fit-content;
    }
}

@media (min-width: 992px) {
    main {
        max-width: 800px;
        padding: 1.5rem;
    }

    header h1 {
        font-size: 2.5rem;
    }

    .nav-list li a {
        font-size: 1.2rem;
    }

    .topics-list h2 {
        font-size: 1.8rem;
    }

    .topic-container {
        padding: 1.5rem;
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .topic-box {
        margin-bottom: 0;
    }
}

@media (min-width: 1200px) {
    main {
        max-width: 1000px;
    }
}