:root {
    /* Brand colours */
    /* --rtc-primary: #10075b; */
    --rtc-primary: #10075b;
    --rtc-secondary: #8fd3ff;
    --rtc-accent: #fff36b;

    /* Text */
    --rtc-text: #ffffff;
    --rtc-text-muted: #aaa7df;
    --rtc-text-light: #ddd9ff;

    /* Surfaces */
    /* --rtc-background: #10075b; */
    --rtc-background: var(--rtc-primary);
    --rtc-surface: #ffffff;

    /* Effects */
    --rtc-shadow: 0 8px 20px rgba(0,0,0,.25);
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    font-family: "Segoe UI", Arial, sans-serif;
    background: var(--rtc-background);
    color: var(--rtc-text);
}
a {
    color: inherit;
}
button {
    font-family: inherit;
    cursor: pointer;
}
.text-muted {
    color: var(--rtc-text-muted);
}
.text-accent {
    color: var(--rtc-accent);
}

/* --------------------------------
   General page content
-------------------------------- */

main {
    width: 100%;
}

.page-content {
    max-width: 900px;
    margin: 50px auto;
    padding: 45px 50px;
    background: var(--rtc-surface);
    color: var(--rtc-primary);
    border-radius: 6px;
    box-shadow: var(--rtc-shadow);
}

/* --------------------------------
   Typography
-------------------------------- */

.page-content h1 {
    margin: 0 0 35px;
    text-align: center;
    color: var(--rtc-primary);
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 500;
    line-height: 1.2;
}

.page-content h2 {
    margin: 45px 0 15px;
    color: var(--rtc-primary);
    font-size: 1.6rem;
    font-weight: 500;
    line-height: 1.3;
}

.page-content p {
    margin: 0 0 20px;
    color: #333;
    font-size: 1rem;
    line-height: 1.7;
}

.page-content strong {
    color: var(--rtc-primary);
}

/* --------------------------------
   Links
-------------------------------- */

.page-content a {
    color: var(--rtc-primary);
    font-weight: 600;
    text-decoration: underline;
    text-decoration-color: var(--rtc-secondary);
    text-decoration-thickness: 2px;
    text-underline-offset: 3px;
    transition: color 0.2s ease;
}

.page-content a:hover {
    color: #2419a0;
}

/* --------------------------------
   Video
-------------------------------- */

.video-container {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%;
    margin: 0 0 40px;
    overflow: hidden;
    border-radius: 6px;
    background: #000;
    box-shadow: var(--rtc-shadow);
}

.video-container iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

/* --------------------------------
   Help box
-------------------------------- */

.help-box {
    margin-top: 50px;
    padding: 25px 30px;
    background: #f3f1ff;
    border-left: 5px solid var(--rtc-accent);
    border-radius: 4px;
}

.help-box h2 {
    margin: 0 0 10px;
    color: var(--rtc-primary);
}

.help-box p {
    margin-bottom: 0;
}

/* --------------------------------
   Mobile
-------------------------------- */

@media (max-width: 700px) {
    .page-content {
        margin: 25px 15px;
        padding: 30px 25px;
        border-radius: 4px;
    }

    .page-content h1 {
        margin-bottom: 25px;
    }

    .page-content h2 {
        margin-top: 35px;
        font-size: 1.4rem;
    }

    .page-content p {
        font-size: 0.95rem;
    }

    .help-box {
        padding: 20px;
    }
}