:root {
    --primary: #3f37c9;
    --accent: #4895ef;
    --bg: #f6f7fb;
    --window-bg: #fff;
    --border: #ddd;
    --text-main: #222;
    --text-sub: #666;
    --success: #2a9d8f;
    --error: #e63946;
    --warning: #f4a261;
}

/* ===== 基本 ===== */
body {
    margin: 0;
    font-family: "Segoe UI", "Meiryo", sans-serif;
    background: var(--bg);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===== ヘッダー ===== */
header {
    background: var(--primary);
    color: #fff;
    padding: 0.75rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

header h1 {
    font-size: 1.25rem;
    margin: 0;
}

#refreshBtn {
    background: var(--accent);
    color: #fff;
    border: none;
    padding: 0.4rem 1rem;
    border-radius: 6px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: 0.2s;
}
#refreshBtn:hover {
    opacity: 0.85;
}

/* ===== メイン ===== */
main {
    flex: 1;
    max-width: 900px;
    margin: 2rem auto;
    width: 100%;
    text-align: center;
}

.grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin: 0 20px;
}

@media (max-width: 640px) {
    .grid {
        grid-template-columns: 1fr;
    }
}

/* ===== ウィンドウ ===== */
.window {
    background: var(--window-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: 0 6px 15px rgba(0,0,0,0.05);
    overflow: hidden;
    transition: all 0.3s ease;
}

.window-header {
    background: #f1f1f1;
    padding: 0.5rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    font-size: 0.95rem;
}

.window-buttons {
    display: flex;
    gap: 6px;
}

.window-button {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}
.window-button { background: var(--text-sub); }

.window-body {
    padding: 1.5rem;
}

.ip {
    font-family: monospace;
    font-size: 1.2rem;
    color: var(--accent);
    margin: 0.5rem 0;
}

.org {
    font-family: monospace;
    font-size: 1.2rem;
    color: var(--text-main);
}

.as {
    font-family: monospace;
    font-size: 1.2rem;
    color: var(--text-main);
    margin: 0.5rem 0;
}

.asn {
    font-size: 0.9rem;
    color: var(--text-sub);
    margin: 0.25rem 0 0.75rem;
}

.host {
    font-size: 0.9rem;
    color: var(--text-sub);
    margin: 0.25rem 0 0.75rem;
}

.ping {
    font-family: monospace;
    font-size: 1.5rem;
    color: var(--success);
}

/* ===== フッター ===== */
footer {
    background: #eee;
    color: var(--text-sub);
    text-align: center;
    padding: 0.5rem;
    font-size: 0.85rem;
}

a {
    text-decoration: none;
    color: var(--text-sub)
}

/* ===== フェード ===== */
.fade-update {
    opacity: 0;
    transition: opacity 0.4s ease;
}
.fade-update.show {
    opacity: 1;
}