@font-face {
    font-family: 'Open Sans';
    src: url('../fonts/OpenSans-Variable.ttf') format('truetype-variations');
    font-weight: 100 900;
    font-stretch: 75% 125%;
    font-style: normal;
    font-display: swap;
}

/* =========================
   GLOBAL VARIABLES
   ========================= */
:root {
    --font-base: 'Open Sans', sans-serif;
    --base-bg-color: #292929;
    --base-font-size: 15px;
}

/* =========================
   BASE STYLES
   ========================= */
body {
    font-family: var(--font-base);
    font-size: var(--base-font-size);
    background: var(--base-bg-color);
    color: white;
    margin: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

img {
    display: inline-block;
    vertical-align: middle;
    line-height: 1;
    max-width: 100%;
    height: auto;
}

img.inline {
    vertical-align: middle;
    margin: 0 4px;
    position: relative;
    top: -1px;
}

/* =========================
   LAYOUT (DESKTOP DEFAULT)
   ========================= */
.layout {
    display: flex;
    flex: 1;
    align-items: center;
    justify-content: center;
    gap: 40px;
    padding: 40px;
}

.sidebar {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
    gap: 20px;
}

.sidebar .logo {
    max-width: 180px;
    border-radius: 100%;
}

.sidebar h1 {
    margin: 0;
    font-size: 1.8rem;
}

.divider {
    width: 2px;
    height: 80%;
    background: rgba(255, 255, 255, 0.2);
}

.content {
    max-width: 600px;
    text-align: left;
}

.content h2 {
    margin-top: 0;
}

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

a {
    color: #66b3ff;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

hr {
    margin: 2rem 0;
    border: none;
    border-top: 1px solid #555;
}

footer {
    text-align: center;
    font-size: 0.9em;
    color: #aaa;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* =========================
   MOBILE RESPONSIVE DESIGN
   ========================= */
@media (max-width: 900px) {
    .layout {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 20px;
        padding: 20px;
    }

    .sidebar {
        align-items: center;
        text-align: center;
        gap: 10px;
    }

    .sidebar .logo {
        max-width: 120px;
    }

    .divider {
        display: none;
    }

    .content {
        max-width: 90%;
    }

    .content h2 {
        font-size: 1.3rem;
    }

    body {
        font-size: 14px;
    }
}

@media (max-width: 500px) {
    .layout {
        padding: 10px;
        gap: 15px;
    }

    .sidebar h1 {
        font-size: 1.5rem;
    }

    footer {
        font-size: 0.8em;
        padding: 0.8rem 0;
    }
}