/* === LAYOUT === */
body {
    margin: 0;
    padding: 0;
    background-color: white;
    font-family: "Lucida Console", "Courier New", monospace;
}

main {
    min-height: 800px;
}

.main_tab {
    margin: auto;
    max-width: 860px;
    padding: 0 15px;
    box-sizing: border-box;
}

/* === NAVIGATION === */
nav {
    background-color: #333;
    width: 100%;
}

nav ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    background-color: #333;
    min-height: 70px;
    box-shadow: -5px 6px 5px 6px #EBF3FA;
}

nav li {
    flex-shrink: 0;
}

nav li a {
    display: block;
    color: white;
    padding: 24px 20px;
    text-decoration: none;
    font-size: 14px;
    font-weight: bold;
}

nav li a:hover {
    background-color: #111;
}

.nav-dropdown {
    position: relative;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: #333;
    min-width: 200px;
    max-height: 70vh;
    overflow-y: auto;
    box-shadow: 0 4px 8px rgba(0,0,0,0.3);
    z-index: 100;
    flex-direction: column;
    flex-wrap: nowrap;
    min-height: auto;
}

.dropdown-menu li {
    float: none;
    height: auto;
    flex-shrink: 0;
}

.dropdown-menu li a {
    padding: 14px 20px;
    white-space: nowrap;
}

.nav-dropdown:hover .dropdown-menu,
.dropdown-menu.dropdown-open {
    display: flex;
}

/* === SECTIONS (clickable list items) === */
.section {
    color: black;
    background-color: white;
    max-width: 800px;
    width: 100%;
    height: auto;
    padding: 15px;
    margin: 20px auto 10px;
    box-shadow: -5px 6px 5px 6px #EBF3FA;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    box-sizing: border-box;
}

.section:hover {
    background-color: #EBF3FA;
    color: #333;
}

.section_name {
    padding: 5px;
}

.sections_title {
    color: black;
    padding-top: 30px;
    font-weight: bold;
}

/* === TASKS === */
.task {
    color: black;
    background-color: white;
    max-width: 800px;
    width: 100%;
    height: auto;
    padding: 10px;
    margin: 30px auto 50px;
    box-shadow: -5px 6px 5px 6px #EBF3FA;
    box-sizing: border-box;
}

.task_text {
    margin-left: 10px;
    padding: 15px;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.task_text_title {
    font-size: 24px;
    font-weight: bold;
    margin-left: 10px;
    padding: 15px;
}

.rep_task_text {
    font-weight: bold;
}

.examples {
    text-indent: 1em;
}

/* === SOLUTION BUTTON === */
.solution_button {
    font-weight: bold;
    background-color: #EBF3FA;
    border-radius: 15px;
    margin: 20px auto 0;
    padding: 10px 20px;
    max-width: 160px;
    text-align: center;
    cursor: pointer;
}

.solution_button:hover {
    box-shadow: 0 12px 16px 0 rgba(0,0,0,0.24), 0 17px 50px 0 rgba(0,0,0,0.19);
    background-color: #e6f3ff;
}

/* === EXAM ABCD === */
.abcd_ul {
    margin-left: 30px;
    padding: 10px;
}

.abcd_li {
    padding: 5px 0;
}

/* === PICTURES === */
.picture {
    max-width: 300px;
    width: 100%;
    display: block;
    margin: auto;
}

.picture_2 {
    max-width: 500px;
    width: 100%;
    display: block;
    margin: auto;
}

.picture_kratka {
    max-width: 400px;
    width: 100%;
    display: block;
    margin: auto;
}

.picture_main {
    max-width: 700px;
    width: 100%;
}

/* === MAIN PAGE === */
.main_buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
    margin-bottom: 20px;
}

.main_buttons .main_button {
    flex: 1 1 200px;
    max-width: 240px;
    text-align: center;
    box-sizing: border-box;
}

.main_button {
    display: block;
    padding: 14px 30px;
    background-color: #333;
    color: white;
    text-decoration: none;
    font-size: 14px;
    font-weight: bold;
    font-family: inherit;
    border-radius: 6px;
    transition: background-color 0.2s;
}

.main_button:hover {
    background-color: #555;
}

.main_links_section {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    justify-content: center;
    margin: 0 auto 40px;
    max-width: 600px;
}

.main_links_col {
    flex: 1 1 200px;
    max-width: 260px;
    text-align: left;
}

.main_links_header {
    font-weight: bold;
    font-size: 14px;
    color: #333;
    margin-bottom: 6px;
    border-bottom: 1px solid #ddd;
    padding-bottom: 4px;
}

.main_links_col a {
    color: #5a9fd4;
    text-decoration: none;
    font-size: 13px;
}

.main_links_col a:hover {
    text-decoration: underline;
}

.main_links_col p {
    margin: 6px 0;
}

/* === FOOTER === */
.gdpr {
    padding: 10px;
    margin-top: 70px;
    background-color: AliceBlue;
    width: 100%;
    text-align: center;
    font-size: 13px;
    box-sizing: border-box;
}

/* === COOKIE BANNER === */
.cookie-banner {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: #333;
    color: white;
    padding: 15px 20px;
    font-size: 13px;
    box-sizing: border-box;
    z-index: 1000;
}

.cookie-banner p {
    margin: 0;
    flex: 1 1 300px;
}

.cookie-banner a {
    color: #5a9fd4;
}

.cookie-buttons {
    display: flex;
    gap: 10px;
}

.cookie-buttons button {
    padding: 8px 20px;
    border: none;
    border-radius: 4px;
    font-family: inherit;
    font-size: 13px;
    font-weight: bold;
    cursor: pointer;
}

.cookie-buttons button:first-child {
    background-color: #5a9fd4;
    color: white;
}

.cookie-buttons button:last-child {
    background-color: #666;
    color: white;
}

.cookie-buttons button:hover {
    opacity: 0.85;
}

/* === RESPONSIVE === */
@media (max-width: 600px) {
    nav ul {
        flex-direction: column;
        min-height: auto;
    }

    nav li a {
        padding: 14px 15px;
        font-size: 13px;
        border-bottom: 1px solid #444;
    }

    .dropdown-menu {
        position: static;
        box-shadow: none;
        max-height: 300px;
    }

    .dropdown-menu li a {
        padding: 12px 30px;
        font-size: 12px;
    }

    .section {
        font-size: 15px;
        padding: 10px;
    }

    .task_text {
        margin-left: 0;
        padding: 10px;
        overflow-x: auto;
    }

    .task_text_title {
        margin-left: 0;
        padding: 10px;
        font-size: 20px;
    }

    .task {
        padding: 5px;
        margin: 15px auto 25px;
    }

    .abcd_ul {
        margin-left: 10px;
    }

    main {
        min-height: auto;
    }

    .main_buttons .main_button {
        flex: 1 1 100%;
        max-width: 100%;
    }

    .main_links_section {
        flex-direction: column;
        align-items: center;
    }

    .flashcard {
        min-height: 150px;
        padding: 20px;
        overflow-x: auto;
    }

    .card-face {
        font-size: 18px;
    }

    .cookie-banner {
        flex-direction: column;
        text-align: center;
        padding: 12px 15px;
    }

    .cookie-buttons button {
        padding: 12px 24px;
    }

    .tf-btn {
        min-width: 110px;
        padding: 14px 20px;
        font-size: 16px;
    }
}