:root {
    --ink: #000;
    --bg: #fff;
    --sky: #8ec5ff;
    --ground: #f7b36a;
    --box-border: #8a8a8a;
    /* 数値ボックスの枠色（ややグレー） */
}

html,
body {
    height: 100%;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: system-ui, -apple-system, Segoe UI, Roboto, "Noto Sans JP", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
}

main {
    max-width: 420px;
    margin: 0 auto;
    padding: 10px;
}

.grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-auto-rows: auto;
    gap: 12px;
}

/* ラベルは中央揃え。外枠は付けない */
.hLabel {
    font-weight: 800;
    letter-spacing: .02em;
    margin: 0 0 6px 0;
    text-align: center;
}

/* 数値ボックスのみ枠あり（グレー寄り） */
.box {
    border: 2px solid var(--box-border);
    border-radius: 10px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    font-weight: 800;
    background: #fff;
}

.num {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
    font-size: 18px;
}

.unit {
    font-size: 14px;
    opacity: .9;
}

/* 人工地平：外枠はコンテナ側 */
#pfdFrame {
    display: block;
    width: 100%;
    aspect-ratio: 1/1;
    background: #fff;
    border: 3px solid #000;
    border-radius: 8px;
    overflow: hidden;
}

#pfd {
    display: block;
    width: 100%;
    height: 100%;
}

#pfd.is-hidden {
    visibility: hidden;
}

/* ボタン行 */
.btns {
    display: flex;
    gap: 10px;
    justify-content: flex-start;
}

button {
    appearance: none;
    background: #fff;
    border: 2px solid #000;
    border-radius: 8px;
    padding: 8px 16px;
    font-weight: 800;
}

button:disabled {
    opacity: .5;
}

.note {
    font-size: 12px;
    margin-top: 6px;
    opacity: .8;
}