/* -------------------------- */
/*      Kajotte Studio        */
/* -------------------------- */
:root {
    --bg-color: #000000;
    --card-bg: #0b0b0b;
    --border-color: #222222;
    --text-main: #e0e0e0;
    --text-muted: #888888;
    --accent-color: #ffffff;
    --button-bg: #111111;
    --button-border: #333333;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 600px;
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.lang-nav {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    font-size: 0.85rem;
    font-weight: 600;
}

.lang-nav a {
    color: var(--text-muted);
    text-decoration: none;
    padding: 4px 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--card-bg);
}

.lang-nav a.active {
    color: var(--accent-color);
    border-color: #555555;
}

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 28px;
}

.card-warning {
    text-align: left;
}

.card-warning h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 12px;
}

.card-warning p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.card-main {
    text-align: center;
}

.card-main h2 {
    font-size: 1.6rem;
    font-weight: 800;
    color: #ffffff;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.card-main p {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 20px;
    line-height: 1.5;
}

.github-btn {
    display: block;
    width: 100%;
    padding: 16px;
    background-color: var(--button-bg);
    border: 1px solid var(--button-border);
    border-radius: 8px;
    color: #ffffff;
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-decoration: none;
    text-transform: uppercase;
    margin-bottom: 20px;
    transition: background-color 0.2s, border-color 0.2s;
}

.github-btn:hover {
    background-color: #1a1a1a;
    border-color: #666666;
}

.instruction-box {
    background-color: #050505;
    border: 1px dashed var(--button-border);
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 20px;
    text-align: left;
    font-size: 0.88rem;
    color: var(--text-main);
}

.instruction-box ul {
    margin-top: 8px;
    padding-left: 20px;
    color: var(--text-muted);
}

.instruction-box li {
    margin-bottom: 6px;
}

.subtext {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.5;
}

footer {
    text-align: center;
    font-size: 0.8rem;
    color: #555555;
    margin-top: 10px;
}