:root {
    --bg-dark: #2e3440;
    --bg-medium: #3b4252;
    --bg-light: #434c5e;
    --text-light: #eceff4;
    --text-white: #ffffff;
    --border-color: #4c566a;
    --accent-blue: #5e81ac;
    --accent-blue-hover: #81a1c1;
    --accent-green: #a3be8c;
    --accent-red: #bf616a;
    --indicator-border: #d8dee9;
    --indicator-checked: #88c0d0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-light);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.main-container {
    width: 100%;
    max-width: 800px;
    margin: 20px auto;
    padding: 0 20px;
}

.content-frame {
    background-color: var(--bg-light);
    border-radius: 10px;
    padding: 40px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    position: relative;
}

/* --- Oldalak --- */
.hidden {
    display: none;
}

#start-page {
    text-align: center;
}

#start-page h1 {
    color: var(--text-white);
    font-size: 2em;
    margin-bottom: 1rem;
}

#quiz-selection-container {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-bottom: 20px;
}

#quiz-selection-container button {
    flex-grow: 1;
    min-width: 200px;
}

/* --- Letöltési szekció --- */
#download-section {
    margin-top: 5px;
    padding-top: 5px;
}

#download-controls {
    display: flex;
    gap: 10px;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

#quiz-download-select {
    font-size: 1em;
    padding: 10px 15px;
    border-radius: 5px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-medium);
    color: var(--text-white);
    min-width: 250px;
    cursor: pointer;
}

#quiz-download-select:focus {
    outline: 2px solid var(--accent-blue);
    outline-offset: 2px;
}

/* --- Kvíz elemek --- */
#question-container {
    background-color: var(--bg-medium);
    color: var(--text-white);
    font-size: 1.2em;
    padding: 20px;
    border-radius: 8px;
    text-align: center;
    margin-bottom: 20px;
}

#answer-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}

.answer-option {
    display: block;
    background-color: var(--bg-medium);
    padding: 15px;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.answer-option:hover {
    background-color: #4c566a;
}

.answer-option input {
    margin-right: 10px;
}

#answer-input {
    font-size: 1em;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    background-color: var(--bg-medium);
    color: var(--text-white);
    text-align: center;
    width: 100%;
    box-sizing: border-box;
}

/* --- Visszajelzés és Gombok --- */
#feedback-container {
    padding: 10px;
    border-radius: 8px;
    text-align: center;
    font-weight: bold;
    margin-bottom: 20px;
    color: var(--text-white);
}

#feedback-container.correct {
    background-color: var(--accent-green);
}

#feedback-container.incorrect {
    background-color: var(--accent-red);
}

#button-container {
    text-align: center;
}

button {
    font-size: 1em;
    font-weight: bold;
    padding: 10px 20px;
    border-radius: 5px;
    border: none;
    background-color: var(--accent-blue);
    color: white;
    cursor: pointer;
    transition: background-color 0.2s;
    margin: 0 5px;
}

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

button.button-secondary {
    background-color: var(--bg-medium);
}

button.button-secondary:hover {
    background-color: var(--bg-light);
}

button:disabled {
    background-color: var(--border-color);
    cursor: not-allowed;
}

.answer-option input[type="radio"],
.answer-option input[type="checkbox"] {
    accent-color: var(--indicator-checked);
}

#back-button-container {
    position: absolute;
    top: 20px;
    right: 20px;
}

.answer-option input[type="radio"]:disabled {
    opacity: 0.5;
}

.answer-option input[type="radio"]:checked:disabled {
    opacity: 1;
}

.answer-option:has(input[type="radio"]:checked:disabled) {
    background-color: var(--border-color);
}

/* Alert üzenetek */
.alert {
    padding: 12px 16px;
    border-radius: 5px;
    margin-bottom: 20px;
    font-weight: 500;
    transition: opacity 0.5s ease-out;
}

.alert-success {
    background-color: var(--accent-green);
    color: white;
}

.alert-error {
    background-color: var(--accent-red);
    color: white;
}

.alert-fade-out {
    opacity: 0;
}