:root {
    --font-size-5vw: 5vw;
    --font-size-6vw: 6vw;
    --font-size-7vw: 7vw;
    --font-size-9vw: 9vw;
    --font-size-4vw: 4vw;
    --font-size-3-5vw: 3.5vw;
    --font-size-4-5vw: 4.5vw;
    --font-size-12vw: 12vw;
    --margin-top-1vw: 1vw;
    --margin-bottom-3vw: 3vw;
    --padding-2vw: 2vw;
    --margin-0-8vw: 0.8vw;
    --margin-1-5vw: 1.5vw;
}

html {
    scroll-behavior: smooth;
}

/* Grundlegende Stile */
body {
    margin: 0;
    padding: 0;
    font-family: 'Arial', sans-serif;
    background-color: #f5f5f5;
}

h1, h2, h3, p {
    margin: 0;
    padding: 0;
    text-align: center;
}

/* Header */
.header {
    background-image: url('src/images/classroom-background.png'); /* Hintergrundbild einfügen */
    background-size: cover;
    background-position: center;
    position: relative;
    height: 100vh;
    min-height: 390px;
    color: white;
}

.overlay {
    background-color: rgba(0, 0, 0, 0.5);
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.featured-name {
    position: absolute;
    width: 100%;
    margin-top: var(--margin-top-1vw);
    font-size: var(--font-size-7vw);
    margin-bottom: 10px;
}

.title {
    font-size: var(--font-size-12vw);
    margin-bottom: var(--font-size-4vw);
    margin-left: var(--font-size-4vw);
    margin-right: var(--font-size-4vw);
}

.scroll-down {
    font-size: var(--font-size-12vw);
    animation: bounce 2s infinite;
    color: white;
    text-decoration-line: none;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {transform: translateY(0);}
    40% {transform: translateY(-10px);}
    60% {transform: translateY(-5px);}
}

/* Countdown-Bereich */
.countdown {
    background-color: #a3dbf1;
    text-align: center;
    padding: 20px;
}

.countdown p {
    font-size: var(--font-size-3-5vw);
}

.countdown-timer {
    display: flex;
    flex-wrap: wrap;
    justify-content:space-evenly;
    font-size: var(--font-size-4-5vw);
    margin: 10px 0;
}

.book-visual {
    color: white;
    position:relative;
    cursor: alias;
}

.book-open {
    position:absolute;
    right:0;
}

.book-open div {
    color:#8FDAEE;
    font-size: var(--font-size-3-5vw);
    position:relative;
    font-weight: bold;
    transform:rotate(10deg);
}
.book-open img {
    width: 12vw;
}

.book-image img {
    max-width: 70vw;
    width: 100%;
    margin: 20px auto;
    display: block;
}

/* Stil für die Leseproben-Inhalte */
.samples-grid {
    background-color: white;
    display: flex; /* Horizontale Anordnung */
    justify-content: space-around; /* Platz zwischen den Bildern */
    padding: 20px;
}

.sample-item {
    text-align: center; /* Zentriere den Text unter den Bildern */
}

.sample-item img {
    width: 8vw; /* Größe des quadratischen Bildes */
    height: 8vw; /* Größe des quadratischen Bildes */
    object-fit: cover; /* Bildfüllung für quadratische Form */
    border-radius: 10px; /* Abgerundete Ecken für Bilder */
}

.sample-item p {
    margin-top: 10px;
    font-size: var(--padding-2vw) !important;
}

/* Beschreibungstext */
.description {
    margin: 0px 10vw 20px 10vw;
    padding: 20px;
    text-align: center;
    background-color: #fff;
    font-size:var(--font-size-3-5vw);
}

.desktop-only {
    display:none;
}

/* Buchpräsentationen */
.presentations {
    padding: var(--padding-2vw);
    background-color: #fff;
    text-align: center;
}

.presentations h2 {
    font-size: var(--font-size-6vw);
    color: #606060;
}

.presentation-table {
    background-color: #fff;
    padding: var(--margin-top-1vw);
    margin: var(--padding-2vw) auto;
    overflow-y: auto;
    width: 95%;
}

.presentation-item {
    padding:var(--margin-top-1vw);
    border: 1px gray solid;
    border-left: 1.3vw #8FDAEE solid;
}

.presentation-item .location {
    margin: 0;
    margin-bottom: var(--margin-1-5vw);
    color: black;
    text-decoration-line: underline;
    font-family: 'Noto Serif', 'Times New Roman', Times, serif;
    font-weight: 100;
    font-size: var(--font-size-4vw);
}

.presentation-item div {
    display:flex;
    flex-wrap: wrap;
    justify-content: space-around;
    font-size: var(--font-size-3-5vw);
    margin-bottom: var(--margin-0-8vw);
}

.signup-btn {
    padding: 10px 20px;
    background-color: #8FDAEE;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: var(--font-size-3-5vw);
}

/* Popup-Styling */
.popup {
    display: none; /* Versteckt das Popup standardmäßig */
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
}

.popup-content {
    background-color: white;
    color: #606060;
    margin: 15% auto;
    width: 80%;
    max-width: 700px;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.2);
}

.popup-content-header {
    color: white;
    background-color: #8FDAEE;
    border-radius: 10px;
    padding-bottom: 30px;
    padding-top: 10px;
    margin-bottom:-20px;
    width: 100%
}

.popup-content-header h3 {
    font-size: var(--font-size-6vw);
}

.popup-content .close-btn, .close-samples-btn {
    padding-right: 10px;
    font-size: var(--font-size-6vw);
}

.signup-confirm-btn {
    padding: 10px 20px;
    background-color: #8FDAEE;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: var(--font-size-5vw);
}

.popup-content form {
    background-color: white;
    padding:20px;
}

.popup-content p {
    font-size: var(--font-size-5vw);
}

.popup-content input {
    display: block;
    width: 90%;
    padding: 10px;
    margin-bottom: 20px;
    font-size: var(--font-size-6vw);
    border:none;
    border-bottom: 1px solid #606060;
    color: #606060;
    background-color: rgba(0,0,0,0);
}

.popup-content label {
    display: block;
    text-align: left;
    font-size: var(--font-size-5vw);
}

.close-btn, .close-samples-btn {
    float: right;
    cursor: pointer;
}

.links {
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    margin-top: var(--margin-top-1vw);
    padding-bottom: var(--margin-0-8vw);
    border-bottom: var(--margin-0-8vw) solid #8FDAEE;
}

.links a {
    color: #8FDAEE;
    text-decoration-line: none;
    font-size: var(--font-size-4vw);
}

.links a::before {
    content: "\21AA";
}

/* Pressespiegel */
.press-section {
    display: flex;
    align-items: center;
    width: 100%;
    padding: var(--margin-0-8vw) 0;
    border-bottom: var(--margin-0-8vw) solid #8FDAEE;
    background-color: white;
}

.press-title {
    display: flex;
    align-items: center;
    padding: 0 var(--margin-bottom-3vw);
    border-right: var(--margin-0-8vw) solid #606060;
}

.press-title h2 {
    font-family: 'Noto Serif', 'Times New Roman', Times, serif;
    text-decoration-line: underline;
    font-size: var(--font-size-9vw);
    color: #606060;
    margin-bottom: var(--margin-bottom-3vw);
    margin-right: 10px;
}

.carousel-container {
    margin: 0 var(--margin-bottom-3vw);
    display: flex;
    align-items: center;
    width: 100%;
    overflow: hidden; /* Verhindert das Scrollen außerhalb der Karussellbreite */
    position: relative;
}

.carousel {
    display: flex;
    transition: transform 1s ease-in-out;
    width: 100%; /* Abzug der Breite der Pfeile */
}

.carousel a {
    text-decoration-line: none;
    color: #606060;
}

.carousel-item {
    flex: 0 0 auto; /* Verhindert, dass die Elemente wachsen oder schrumpfen */
    width: 22vw; /* Breite der einzelnen Bilder */
    text-align: center;
    margin-right: 10px; /* Abstand zwischen den Bildern */
    position: relative;
    display:inline-block;
}

.carousel-item img {
    width: 60%;
    padding: 0 var(--margin-bottom-3vw);
    display: block;
    margin:auto;
}

.carousel-item p {
    font-size: var(--font-size-4vw);
    color: #606060;
}


/* Kontaktformular */
.contact-form {
    padding: 20px;
    background-color: #fcfcfc;
    text-align: center;
}

.contact-form input {
    display: block;
    width: 90%;
    padding: 10px;
    margin-bottom: 20px;
    font-size: var(--font-size-7vw);
    border:none;
    border-bottom: #fff 1px solid;
    background-color: rgba(0,0,0,0);
    color: #fff;
}

.contact-form h2 {
    font-family: 'Noto Serif', 'Times New Roman', Times, serif;
    text-decoration-line: underline;
    font-size: var(--font-size-9vw);
    color: #606060;
    margin-bottom: var(--margin-bottom-3vw);
}

.contact-form label {
    display: block;
    text-align: left;
    font-size: var(--font-size-5vw);
}

.contact-information {
    background-color: #8FDAEE;
    color: #fff;
    width: 75%;
    height:fit-content;
    left:0;
    margin-left: 20px;
    margin-bottom: 0px;
    padding: 20px;
}

.message-text {
    margin: 0;
    background-color: #fff;
    box-shadow: 1px 1px 5px 0px black;
    padding: 20px;
    left:0;
    width:90%;
    display:flex;
    flex-direction: column;
    align-items:flex-start;
    position:relative;
}

.msg-container p {
    display:none;
    font-size:var(--font-size-3-5vw);
    width:85%;
    padding: 20px;
    text-align: left;
}

.message-text label {
    font-family: 'Noto Serif', 'Times New Roman', Times, serif;
    text-decoration-line: underline;
}

.message-text textarea {
    border: none;
    border-left: 2px black solid;
    padding-left: 20px;
    margin-top: 20px;
    display: block;
    width: 95%;
    font-size: var(--font-size-5vw);
    min-height: 300px;
    resize: vertical;
}

/* file upload button */
input[type="file"]::file-selector-button {
    display:none;
}

input[type="file"] {
    font-size: var(--font-size-5vw);
}

input[type="file"]:hover {
    cursor:pointer;
}

textarea:focus, input:focus {
    outline:none;
}

.submit-btn {
    align-self:flex-end;
    margin-top: var(--margin-top-1vw);
    padding: 10px 20px;
    font-size: var(--font-size-5vw);
    background-color: rgba(60, 60, 60, 0.7);
    color: white;
    border: 2px white dashed;
    border-radius: 5px;
    cursor: pointer;
    
}

.submit-btn img {
    height: var(--font-size-5vw);
    padding-bottom: calc(var(--font-size-5vw)/5);
    display:inline-block;
    vertical-align:middle;
}

/* Footer */
.footer {
    background-color: white;
    color: #606060;
    padding: 10px 0;
    text-align: center;
    font-size: var(--font-size-3-5vw);
    font-family: 'Noto Serif', 'Times New Roman', Times, serif;
    text-decoration-line: underline;
}

.footer a {
    color: #606060;
    text-decoration: none;
    margin: 0 5px;
}

.footer a:hover {
    color: #aaa;
}

/* Small devices (portrait tablets and large phones, 600px and up) */
@media only screen and (min-width: 600px) {
    :root {
        --font-size-5vw: 5vw;
        --font-size-6vw: 6vw;
        --font-size-7vw: 7vw;
        --font-size-9vw: 9vw;
        --font-size-4vw: 4vw;
        --font-size-3-5vw: 3.5vw;
        --font-size-4-5vw: 4.5vw;
        --font-size-12vw: 12vw;
        --margin-top-1vw: 1vw;
        --margin-bottom-3vw: 3vw;
        --padding-2vw: 2vw;
    }
}

/* Medium devices (landscape tablets, 768px and up) */
@media only screen and (min-width: 768px) {
    :root {
        --font-size-7vw: 4vw;
        --font-size-12vw: 7vw;
    }
}

/* Extra large devices (large laptops and desktops, 1200px and up) */
@media only screen and (min-width: 1200px) {
    :root {
        --font-size-5vw: 2.1vw;
        --font-size-6vw: 2.6vw;
        --font-size-7vw: 2vw;
        --font-size-9vw: 3.9vw;
        --font-size-4vw: 1.7vw;
        --font-size-3-5vw: 1.3vw;
        --font-size-4-5vw: 1.9vw;
        --margin-top-1vw: 0.5vw;
        --margin-bottom-3vw: 1.3vw;
        --padding-2vw: 0.9vw;
        --margin-0-8vw: 0.2vw;
        --margin-1-5vw: 0.5vw;
    }
    
    .main-container {
        width: 100vw;
        display: flex;
        flex-direction: row;
        /* justify-content: space-between; */
        align-items: flex-start;
    }

    .description, .book-visual, .presentations {
        flex: 1;
        margin: 0 10px; /* Abstand zwischen den Sections */
    }

    .description {
        max-width: 35vw;
        margin-top: 3vw;
        margin-right:0;
        color: white;
        background-color: #8FDAEE;
    }

    .book-visual {
        max-width: 23vw;
        margin-left:-2px;
    }
    .book-open {
        right: -5vw;
    }
    .book-open div {
        bottom: var(--font-size-3-5vw);
        left: var(--padding-2vw);
    }
    .book-open img {
        width: var(--font-size-12vw);
    }

    .carousel-item {
        width: 9.6vw;
        display:flex;
    }

    .presentations {
        position:absolute;
        width:30%;
        right: 0;
    }
    .presentation-table {
        max-height: 30vw;
    }
    .contact-information {
        width: 25%;
    }
    .contact-form form {
        display: flex;
        flex-direction: row;
    }
    .contact-form input {
        font-size: var(--font-size-4vw);
    }
    .msg-container {
        width:75%;
    }
    .desktop-only {
        display:block !important;
    }
    .desktop-except {
        display:none !important;
    }
    .message-text textarea {
        min-height: 500px;
    }
}