/* Responsive CSS with Light/Dark Mode and Font Size Scaling */

/* CSS Variables for Theme and Font Size */
:root {
    --font-size-multiplier: 1.0;
    
    /* Light Mode Colors (Default) */
    --bg-color: rgb(251, 247, 244);
    --text-color: #303030;
    --header-bg-image: url(Assets/menu-bg.png);
    --header-bg-color: transparent;
    --header-text: white;
    --main-bg: rgb(251, 247, 244);
    --left-bg: rgb(220, 220, 220);
    --left-bg-starter: transparent;
    --footer-bg-image: url(Assets/menu-bg.png);
    --footer-bg-color: transparent;
    --footer-text: #FFF;
    --link-color: #A31F34;
    --link-hover: #7a1525;
    --hr-color: rgb(230, 230, 230);
    --shadow-color: #CFCFCF;
    --button-bg: #2e9df7;
    --button-hover: #47a9f8;
    --button-border: #2b79b8;
    --h3-color: rgb(150, 0, 0);
}

/* Dark Mode Colors */
.dark-mode {
    --bg-color: #1a1a1a;
    --text-color: #e0e0e0;
    --header-bg-image: none;
    --header-bg-color: #2d2d2d;
    --header-text: #e0e0e0;
    --main-bg: #2d2d2d;
    --left-bg: #3a3a3a;
    --left-bg-starter: transparent;
    --footer-bg-image: none;
    --footer-bg-color: #2d2d2d;
    --footer-text: #e0e0e0;
    --link-color: #ff6b6b;
    --link-hover: #ff8787;
    --hr-color: #4a4a4a;
    --shadow-color: rgba(0, 0, 0, 0.5);
    --button-bg: #4a9eff;
    --button-hover: #6bb3ff;
    --button-border: #357abd;
    --h3-color: #ff8787;
}

/* Base Font Size Scaling */
html {
    font-size: calc(16px * var(--font-size-multiplier, 1.0));
}

html.light-mode {
    background-image: url(Assets/NSE-Reactor-1.png);
    background-repeat: repeat-y;
    background-color: rgb(250, 250, 250);
}

html.dark-mode {
    background-image: none;
    background-color: #1a1a1a;
}

body {
    font-size: calc(1em * var(--font-size-multiplier, 1.0));
    background-color: transparent;
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Responsive Container */
#body {
    margin: 0px auto;
    max-width: 1080px;
    width: 100%;
    padding: 0px;
    font-family: Georgia, serif;
    box-sizing: border-box;
}

/* Responsive Header */
#header {
    width: 100%;
    max-width: 1080px;
    height: auto;
    min-height: 60px;
    z-index: 1000;
    background: var(--header-bg-color) var(--header-bg-image);
    background-repeat: repeat;
    position: relative;
    top: 0px;
}

/* Responsive Main Content */
#main {
    top: 0px;
    padding-top: 50px;
    width: 100%;
    max-width: 880px;
    margin: 0 auto;
    height: auto;
    background-color: var(--main-bg);
    padding-left: 20px;
    padding-right: 20px;
    padding-bottom: 20px;
    box-shadow: 0 0 20px var(--shadow-color);
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
    box-sizing: border-box;
}

/* Typography with Font Scaling */
h1, h2, h3, h4, h5, h6 {
    font-family: "Oswald Regular", sans-serif;
    font-weight: 600;
    text-decoration: none;
    color: var(--text-color);
    text-rendering: optimizelegibility;
    transition: color 0.3s ease;
}

h1 {
    font-size: calc(36px * var(--font-size-multiplier, 1.0));
    font-weight: 600;
}

h2 {
    font-size: calc(28px * var(--font-size-multiplier, 1.0));
}

h3 {
    font-size: calc(24px * var(--font-size-multiplier, 1.0));
    color: var(--h3-color);
}

p {
    line-height: calc(26px * var(--font-size-multiplier, 1.0));
    font-size: calc(1em * var(--font-size-multiplier, 1.0));
}

/* Left Content Blocks */
.left {
    background-color: var(--left-bg);
    padding: calc(40px * var(--font-size-multiplier, 1.0));
    padding-top: calc(10px * var(--font-size-multiplier, 1.0));
    text-align: justify;
    height: auto;
    line-height: calc(25px * var(--font-size-multiplier, 1.0));
    transition: background-color 0.3s ease;
    box-sizing: border-box;
}

.starter {
    background-color: var(--left-bg-starter);
}

/* Links */
a:link {
    text-decoration: none;
    color: var(--link-color);
    transition: color 0.3s ease;
}

a:hover {
    color: var(--link-hover);
}

a:visited {
    color: var(--link-color);
}

/* Footer */
#footer {
    padding: 10px;
    margin-top: 0px;
    height: auto;
    width: 100%;
    max-width: 1080px;
    background: var(--footer-bg-color) var(--footer-bg-image);
    background-repeat: repeat;
    text-align: center;
    color: var(--footer-text);
    transition: background-color 0.3s ease, background-image 0.3s ease, color 0.3s ease;
    box-sizing: border-box;
}

#foot {
    color: var(--footer-text);
    text-decoration: none;
}

/* Horizontal Rule */
hr {
    background-color: var(--hr-color);
    border: none;
    clear: both;
    display: block;
    height: 1px;
    width: 100%;
    max-width: 880px;
    transition: background-color 0.3s ease;
}

/* Buttons */
.button {
    display: inline-block;
    background-color: var(--button-bg);
    height: calc(28px * var(--font-size-multiplier, 1.0));
    position: relative;
    border: solid 1px var(--button-border);
    padding: calc(12px * var(--font-size-multiplier, 1.0)) calc(10px * var(--font-size-multiplier, 1.0)) 0px calc(10px * var(--font-size-multiplier, 1.0));
    outline: 0;
    font-weight: bold;
    font-size: calc(11px * var(--font-size-multiplier, 1.0));
    text-decoration: none;
    color: #FFFFFF;
    cursor: pointer;
    border-radius: 2px;
    box-shadow: 0 1px 0 rgba(0,0,0,0.05);
    margin: calc(15px * var(--font-size-multiplier, 1.0)) auto calc(30px * var(--font-size-multiplier, 1.0)) auto;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

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

/* Menu Styles */
#cssmenu,
#cssmenu > ul {
    background: var(--header-bg-color) var(--header-bg-image);
    background-repeat: repeat;
    font-size: calc(12px * var(--font-size-multiplier, 1.0));
    font-weight: 600;
    width: 100%;
    max-width: 1080px;
}

#cssmenu > ul > li > a {
    color: var(--header-text);
    transition: color 0.3s ease, background 0.3s ease;
}

/* Image Styles */
.ileft {
    float: right;
    padding-left: calc(25px * var(--font-size-multiplier, 1.0));
    padding-top: calc(40px * var(--font-size-multiplier, 1.0));
    text-align: center;
    width: 100%;
    max-width: 400px;
    box-sizing: border-box;
}

.ileft > img {
    width: 100%;
    max-width: 400px;
    height: auto;
}

.caption {
    font-family: "Lucidia", sans-serif;
    font-size: calc(9pt * var(--font-size-multiplier, 1.0));
    font-weight: bold;
}

/* Settings Page Styles */
.settings-container {
    max-width: 600px;
    margin: 0 auto;
}

.setting-group {
    margin-bottom: calc(30px * var(--font-size-multiplier, 1.0));
    padding: calc(20px * var(--font-size-multiplier, 1.0));
    background-color: var(--left-bg);
    border-radius: 8px;
    transition: background-color 0.3s ease;
}

.setting-label {
    display: block;
    margin-bottom: calc(15px * var(--font-size-multiplier, 1.0));
    font-size: calc(18px * var(--font-size-multiplier, 1.0));
    color: var(--text-color);
}

.font-size-display {
    margin-left: calc(10px * var(--font-size-multiplier, 1.0));
    color: var(--link-color);
    font-weight: bold;
}

.theme-toggle-container {
    margin-top: calc(10px * var(--font-size-multiplier, 1.0));
}

.theme-toggle-btn {
    background-color: var(--button-bg);
    color: white;
    border: 1px solid var(--button-border);
    padding: calc(12px * var(--font-size-multiplier, 1.0)) calc(20px * var(--font-size-multiplier, 1.0));
    border-radius: 6px;
    cursor: pointer;
    font-size: calc(16px * var(--font-size-multiplier, 1.0));
    font-weight: bold;
    transition: background-color 0.3s ease, transform 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: calc(8px * var(--font-size-multiplier, 1.0));
}

.theme-toggle-btn:hover {
    background-color: var(--button-hover);
    transform: translateY(-2px);
}

.theme-icon {
    font-size: calc(20px * var(--font-size-multiplier, 1.0));
}

/* Notched Slider Styles */
.slider-container {
    margin-top: calc(20px * var(--font-size-multiplier, 1.0));
    position: relative;
}

.notched-slider {
    width: 100%;
    height: calc(8px * var(--font-size-multiplier, 1.0));
    border-radius: 5px;
    background: var(--left-bg);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
    transition: background 0.3s ease;
}

.notched-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: calc(20px * var(--font-size-multiplier, 1.0));
    height: calc(20px * var(--font-size-multiplier, 1.0));
    border-radius: 50%;
    background: var(--button-bg);
    cursor: pointer;
    border: 2px solid white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
    transition: background 0.3s ease, transform 0.2s ease;
}

.notched-slider::-webkit-slider-thumb:hover {
    background: var(--button-hover);
    transform: scale(1.1);
}

.notched-slider::-moz-range-thumb {
    width: calc(20px * var(--font-size-multiplier, 1.0));
    height: calc(20px * var(--font-size-multiplier, 1.0));
    border-radius: 50%;
    background: var(--button-bg);
    cursor: pointer;
    border: 2px solid white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
    transition: background 0.3s ease, transform 0.2s ease;
}

.notched-slider::-moz-range-thumb:hover {
    background: var(--button-hover);
    transform: scale(1.1);
}

/* Slider Track with Notches */
.notched-slider {
    background: linear-gradient(
        to right,
        var(--left-bg) 0%,
        var(--left-bg) 12.5%,
        var(--hr-color) 12.5%,
        var(--hr-color) 13%,
        var(--left-bg) 13%,
        var(--left-bg) 37.5%,
        var(--hr-color) 37.5%,
        var(--hr-color) 38%,
        var(--left-bg) 38%,
        var(--left-bg) 62.5%,
        var(--hr-color) 62.5%,
        var(--hr-color) 63%,
        var(--left-bg) 63%,
        var(--left-bg) 87.5%,
        var(--hr-color) 87.5%,
        var(--hr-color) 88%,
        var(--left-bg) 88%,
        var(--left-bg) 100%
    );
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    margin-top: calc(10px * var(--font-size-multiplier, 1.0));
    font-size: calc(12px * var(--font-size-multiplier, 1.0));
    color: var(--text-color);
}

.reset-btn {
    background-color: #dc3545;
    color: white;
    border: 1px solid #c82333;
    padding: calc(10px * var(--font-size-multiplier, 1.0)) calc(20px * var(--font-size-multiplier, 1.0));
    border-radius: 6px;
    cursor: pointer;
    font-size: calc(14px * var(--font-size-multiplier, 1.0));
    font-weight: bold;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.reset-btn:hover {
    background-color: #c82333;
    transform: translateY(-2px);
}

/* Mobile Responsive Styles */
@media screen and (max-width: 768px) {
    #body {
        width: 100%;
        padding: 0;
    }
    
    #header {
        position: relative;
        width: 100%;
    }
    
    #main {
        width: 100%;
        max-width: 100%;
        padding-left: 15px;
        padding-right: 15px;
        padding-top: 20px;
        margin: 0;
        box-shadow: none;
    }
    
    #cssmenu > ul {
        flex-direction: column;
        width: 100%;
    }
    
    #cssmenu > ul > li {
        float: none;
        width: 100%;
        border-bottom: 1px solid rgba(255,255,255,0.1);
    }
    
    #cssmenu > ul > li > a {
        padding: 15px;
        line-height: normal;
        display: block;
        width: 100%;
    }
    
    #cssmenu > ul > #title {
        height: auto;
    }
    
    #cssmenu > ul > #title > a {
        padding: 10px 15px;
    }
    
    #cssmenu > ul > #title > a > span > img {
        width: 80px;
        height: auto;
        padding-left: 0;
        margin-right: 0;
    }
    
    .left {
        padding: 20px;
        padding-top: 10px;
    }
    
    .ileft {
        float: none;
        width: 100%;
        max-width: 100%;
        padding-left: 0;
        padding-top: 20px;
        margin-bottom: 20px;
    }
    
    .ileft > img {
        width: 100%;
        max-width: 100%;
    }
    
    #footer {
        width: 100%;
        padding: 15px 10px;
    }
    
    #footer table {
        width: 100%;
    }
    
    #footer td {
        display: block;
        width: 100% !important;
        margin-bottom: 15px;
        text-align: center;
    }
    
    #footer img {
        max-width: 100%;
        height: auto;
    }
    
    hr {
        width: 100%;
        max-width: 100%;
    }
    
    h1 {
        font-size: calc(28px * var(--font-size-multiplier, 1.0));
    }
    
    h2 {
        font-size: calc(24px * var(--font-size-multiplier, 1.0));
    }
    
    h3 {
        font-size: calc(20px * var(--font-size-multiplier, 1.0));
    }
    
    .settings-container {
        max-width: 100%;
    }
    
    .setting-group {
        padding: 15px;
    }
    
    .slider-labels {
        font-size: calc(10px * var(--font-size-multiplier, 1.0));
    }
}

@media screen and (max-width: 480px) {
    #main {
        padding-left: 10px;
        padding-right: 10px;
    }
    
    .left {
        padding: 15px;
    }
    
    h1 {
        font-size: calc(24px * var(--font-size-multiplier, 1.0));
    }
    
    h2 {
        font-size: calc(20px * var(--font-size-multiplier, 1.0));
    }
    
    h3 {
        font-size: calc(18px * var(--font-size-multiplier, 1.0));
    }
    
    .theme-toggle-btn,
    .reset-btn {
        width: 100%;
        justify-content: center;
    }
}

/* Print Styles */
@media print {
    #header,
    #footer,
    #cssmenu {
        display: none;
    }
    
    #main {
        box-shadow: none;
        padding: 0;
    }
}