/* General Variables (Light Mode Defaults) */
:root {
    --bg-primary: #F8F4E3; /* Soft cream */
    --bg-secondary: #FFFFFF; /* White */
    --bg-tertiary: #ECEFF1; /* Light grey */
    --text-color: #455A64; /* Dark blue-grey */
    --heading-color: #37474F; /* Dark charcoal */
    --primary-color: #4CAF50; /* Soft forest green */
    --secondary-color: #2196F3; /* Approachable blue */
    --accent-color: #FFC107; /* Gold */
    --header-bg: #37474F; /* Dark charcoal for header */
    --header-text: #FFFFFF;
    --hero-overlay: rgba(0,0,0,0.6);
    --card-shadow: rgba(0,0,0,0.1);
    --border-color: #CFD8DC; /* Lighter grey for borders */
    --light-text: #888888;
    --light-grey: #b5b5b5;

    /* Font Sizes */
    --logo-font-size: 1.2rem;
    --hero-heading-size: 2.5rem;
    --sub-heading-size: 1.5rem;
    --section-heading-size: 2rem;
}

/* Base Styles */
*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}

body{
    font-family: 'Open Sans', sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--bg-primary);
    overflow-x: hidden;
    transition: background-color 0.5s ease, color 0.5s ease; /* Smooth mode transition */
}

section{
    position: relative;
    padding: 80px 0;
    overflow-x: hidden;
}

/* White Section */
#about-section,
#announcement-section,
#quick-links-section,
#core-values-section,
#video-section,
#learning-env-section,
#gallery-section{
    background-color: var(--bg-secondary);
}

#event-section{
    background-color: var(--bg-tertiary);
}

.container{
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

h1, h2, h3, h4{
    font-family: 'Montserrat', sans-serif;
    color: var(--heading-color);
}

/* Section Heading */
.section-heading{
    position: relative;
    font-size: var(--section-heading-size);
    text-align: center;
    margin-bottom: 40px;
}

.section-heading::after{
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background-color: var(--primary-color);
    margin: 5px auto 0;
}

/* Default Links */
a{
    text-decoration: none;
}

li{
    list-style-type: none;
}

.button{
    display: inline-block;
    padding: 12px 25px;
    border-radius: 5px;
    font-weight: 600;
    transition: all 0.3s ease;
    text-align: center;
    text-shadow: 0 1px 2px rgba(0,0,0,0.1);
    cursor: pointer;
}

.primary-button{
    background-color: var(--primary-color);
    color: var(--header-text);
    border: 2px solid var(--primary-color);
}

.primary-button:hover{
    background-color: var(--heading-color);
    border-color: var(--heading-color);
    color: var(--header-text);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.large-button{
    padding: 15px 35px;
    font-size: 1.2em;
}

.card-icon{
    font-size: 2.5em;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.cta-button{
    background-color: var(--accent-color);
    color: var(--text-color);
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease, color 0.3s ease, background-color 0.3s ease;
}

.cta-button:hover{
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.5);
    background-color: var(--bg-secondary);
    color: var(--primary-color);
    transform: translateY(-10px);
}

.secondary-button{
    background-color: var(--bg-tertiary);
    border-radius: 5px;
    color: var(--heading-color);
    font-weight: 500;
    transition: background-color 0.3s ease, color 0.3s ease, transform 0.3s ease;
    box-shadow: 0 2px 5px var(--card-shadow);
}

.secondary-button:hover{
    background-color: var(--primary-color);
    color: var(--header-text);
    transform: translateY(-3px);
    box-shadow: 0 5px 10px var(--card-shadow);
}


/* Mobile Responsiveness */
@media (max-width: 768px) {
    /* General Variables (Light Mode Defaults) */
    :root {
        /* Font Sizes */
        --logo-font-size: 1.1rem;
        --hero-heading-size: 2.3rem;
        --sub-heading-size: 1.3rem;
    }

    section{
        padding: 60px 0;
    }

    /* Section Heading */
    .section-heading{
        margin-bottom: 35px;
    }

    .button{
        padding: 10px 20px;
    }
}

@media (max-width: 480px) {
    /* General Variables (Light Mode Defaults) */
    :root {
        /* Font Sizes */
        --logo-font-size: 1rem;
        --hero-heading-size: 1.8rem;
        --sub-heading-size: 1.2rem;
        --section-heading-size: 1.9rem;
    }

    section{
        padding: 50px 0;
    }
}