:root {
    --background-color-light: #f4f4f4;
    --text-color-light: #333;
    --header-bg-light: #333;
    --header-text-light: #fff;
    --section-bg-light: #fff;
    --link-color-light: #77aaff;

    --background-color-dark: #333;
    --text-color-dark: #f4f4f4;
    --header-bg-dark: #222;
    --header-text-dark: #fff;
    --section-bg-dark: #444;
    --link-color-dark: #77aaff;
}

body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
    background-color: var(--background-color-light);
    color: var(--text-color-light);
}

body.dark-mode {
    background-color: var(--background-color-dark);
    color: var(--text-color-dark);
}

.container {
    width: 80%;
    margin: auto;
    overflow: hidden;
}

header {
    background: var(--header-bg-light);
    color: var(--header-text-light);
    padding-top: 20px;
    min-height: 70px;
    border-bottom: var(--link-color-light) 3px solid;
}

body.dark-mode header {
    background: var(--header-bg-dark);
    color: var(--header-text-dark);
    border-bottom: var(--link-color-dark) 3px solid;
}


header h1 {
    float: left;
    margin: 0;
    padding: 0;
}

header nav {
    float: right;
    margin-top: 10px;
}

header ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

header li {
    display: inline;
    padding: 0 15px;
}

header a {
    color: var(--header-text-light);
    text-decoration: none;
    text-transform: uppercase;
    font-size: 16px;
}

body.dark-mode header a {
    color: var(--header-text-dark);
}

header a:hover {
    color: var(--link-color-light);
    font-weight: bold;
}

body.dark-mode header a:hover {
    color: var(--link-color-dark);
}

main {
    padding: 20px 0;
}

section {
    padding: 20px;
    margin-bottom: 20px;
    background: var(--section-bg-light);
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

body.dark-mode section {
    background: var(--section-bg-dark);
}


footer {
    padding: 20px;
    margin-top: 20px;
    color: var(--header-text-light);
    background-color: var(--header-bg-light);
    text-align: center;
}

body.dark-mode footer {
    color: var(--header-text-dark);
    background-color: var(--header-bg-dark);
}

/* Language Selector */
.language-selector {
    list-style: none;
    padding: 0;
    text-align: center;
    margin-top: 20px;
}

.language-selector li {
    display: inline-block;
    margin: 0 10px;
}

.language-selector a {
    display: block;
    padding: 10px 20px;
    background: var(--header-bg-light);
    color: var(--header-text-light);
    text-decoration: none;
    border-radius: 5px;
    transition: background-color 0.3s;
}

body.dark-mode .language-selector a {
    background: var(--header-bg-dark);
    color: var(--header-text-dark);
}

.language-selector a:hover {
    background-color: var(--link-color-light);
}

body.dark-mode .language-selector a:hover {
    background-color: var(--link-color-dark);
}

/* Dark Mode Toggle */
.theme-switch-wrapper {
    display: flex;
    align-items: center;
    float: right;
    margin-left: 20px;
}

.theme-switch {
    display: inline-block;
    height: 34px;
    position: relative;
    width: 60px;
}

.theme-switch input {
    display:none;
}

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

.slider:before {
    background-color: #fff;
    bottom: 4px;
    content: "";
    height: 26px;
    left: 4px;
    position: absolute;
    transition: .4s;
    width: 26px;
}

input:checked + .slider {
    background-color: #77aaff;
}

input:checked + .slider:before {
    transform: translateX(26px);
}

.slider.round {
    border-radius: 34px;
}

.slider.round:before {
    border-radius: 50%;
}

/* TTS Section */
#tts textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
    resize: vertical;
    margin-bottom: 10px;
}

#tts button {
    padding: 10px 20px;
    background: var(--header-bg-light);
    color: var(--header-text-light);
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
}

#tts button:hover {
    background-color: var(--link-color-light);
}

body.dark-mode #tts button {
    background: var(--header-bg-dark);
    color: var(--header-text-dark);
}

body.dark-mode #tts button:hover {
    background-color: var(--link-color-dark);
}