/* --- Root Variables for Theming --- */
:root {
    --primary-color: #0A64AE; /* Riverway Blue */
    --secondary-color: #00A7B2; /* Turquoise */
    --accent-color: #70C9F2; /* Light Blue */
    --background-color: #ffffff;
    --text-color: #1C1C1B; /* Charcoal Black */
    --nav-background-color: rgba(255, 255, 255, 0.8);
    --footer-background-color: #f1f1f1;
    --box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

[data-theme="dark"] {
    --primary-color: #70C9F2; /* Light Blue for dark mode */
    --secondary-color: #00A7B2; /* Turquoise */
    --accent-color: #0A64AE; /* Riverway Blue for dark mode */
    --background-color: #1C1C1B; /* Charcoal Black */
    --text-color: #f1f1f1;
    --nav-background-color: rgba(28, 28, 27, 0.8);
    --footer-background-color: #2a2a2a;
    --box-shadow: 0 4px 6px rgba(255,255,255,0.1);
}

/* --- General Styles --- */
body {
    font-family: 'Noto Sans', sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--background-color);
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s;
}

h1, h2, h3 {
    color: var(--primary-color);
    text-align: center;
}

h2 {
    font-size: 2.5em;
    margin-bottom: 1em;
}

p, li {
    line-height: 1.6;
}

section {
    padding: 60px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

/* --- Header & Navigation --- */
header {
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    background-color: var(--nav-background-color);
    backdrop-filter: blur(10px);
    box-shadow: var(--box-shadow);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 10px 20px;
}

.logo img {
    height: 50px;
}
.logo-dark { display: none; }
[data-theme="dark"] .logo-dark { display: block; }
[data-theme="dark"] .logo-light { display: none; }


nav ul {
    list-style: none;
    display: flex;
    gap: 20px;
    margin: 0;
    padding: 0;
}

nav a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: bold;
    padding: 5px 10px;
    border-radius: 5px;
    transition: background-color 0.3s;
}

nav a:hover, .donate-button:hover {
    background-color: var(--primary-color);
    color: var(--background-color);
}

.donate-button {
    background-color: var(--secondary-color);
    color: #fff;
    border-radius: 20px;
    padding: 10px 20px;
}

/* --- Dark Mode Toggle --- */
.theme-switch-wrapper {
    display: flex;
    align-items: center;
}
.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: var(--primary-color);
}
input:checked + .slider:before {
    transform: translateX(26px);
}
.slider.round {
    border-radius: 34px;
}
.slider.round:before {
    border-radius: 50%;
}

/* --- Hero Section --- */
#hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: url('propal_march.jpg') no-repeat center center/cover; /* Placeholder background */
    color: #fff;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.7);
}

#hero h1 {
    font-size: 3.5em;
    color: #fff;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.7);
}

#hero h2 {
    font-size: 2em;
    color: #fff;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.7);
}

.cta-button {
    display: inline-block;
    margin-top: 20px;
    padding: 15px 30px;
    background-color: var(--primary-color);
    color: #fff;
    text-decoration: none;
    font-weight: bold;
    border-radius: 30px;
    transition: background-color 0.3s;
}

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

/* --- Content Sections --- */
.content-container {
    max-width: 800px;
    margin: 0 auto;
    text-align: left;
}

#about ul {
    list-style-position: inside;
}

/* --- Video Section --- */
#video video {
    width: 100%;
    max-width: 800px;
    display: block;
    margin: 0 auto;
    background-color: #000;
    border-radius: 10px;
}

/* --- Press Release --- */
.press-release {
    border-left: 4px solid var(--primary-color);
    padding-left: 20px;
}

/* --- Events Calendar --- */
.calendar-placeholder {
    height: 400px;
    width: 100%;
    background-color: var(--footer-background-color);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
}

/* --- Roundtable Form --- */
#interest-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
    max-width: 600px;
    margin: 20px auto;
}

#interest-form input,
#interest-form textarea {
    padding: 15px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-family: 'Noto Sans', sans-serif;
    font-size: 1em;
    background-color: var(--background-color);
    color: var(--text-color);
}

#interest-form button {
    padding: 15px;
    border: none;
    border-radius: 5px;
    background-color: var(--primary-color);
    color: #fff;
    font-size: 1.1em;
    cursor: pointer;
    transition: background-color 0.3s;
}

#interest-form button:hover {
    background-color: var(--secondary-color);
}

/* --- Donation Section --- */
.donation-options {
    display: flex;
    gap: 40px;
    justify-content: center;
    text-align: center;
}

.donation-method {
    flex-basis: 400px;
    padding: 20px;
    border-radius: 10px;
    box-shadow: var(--box-shadow);
}

/* --- Footer --- */
footer {
    text-align: center;
    padding: 20px;
    background-color: var(--footer-background-color);
    margin-top: 40px;
}

/* --- Responsive Design --- */
@media (max-width: 768px) {
    nav ul {
        display: none; /* Simple hiding for mobile, can be replaced with a hamburger menu */
    }
    h1 {
        font-size: 2.5em;
    }
    h2 {
        font-size: 2em;
    }
    .donation-options {
        flex-direction: column;
    }
}