/* ===========================================================
   水量どうでしょう デザインシステム
   River Ink（深い青緑）+ Rapids Teal（水色）+ Foam（オフホワイト）
   水位3状態: Low（スレートブルー）/ Good（緑）/ High超過（暖色レッド）
   =========================================================== */

@import url('https://fonts.googleapis.com/css2?family=Zen+Kaku+Gothic+New:wght@500;700;900&family=Noto+Sans+JP:wght@400;500;700&display=swap');

:root {
    --river-ink: #16323f;
    --river-ink-light: #23495a;
    --rapids-teal: #1f9daa;
    --rapids-teal-light: #4fc2cd;
    --rapids-teal-soft: #e3f4f6;
    --foam: #f4f1e8;
    --card: #ffffff;
    --ink-text: #1c2b30;
    --ink-muted: #5c6b6f;
    --border-soft: #e2ded2;

    /* 水位の3状態（グラフ・カード・ゲージ共通） */
    --level-low: #6b83a3;
    --level-low-soft: #eef1f6;
    --level-good: #2f8f6e;
    --level-good-soft: #eaf6f0;
    --level-good-border: #bfe3cf;
    --level-high: #c1503a;
    --level-high-soft: #fbe9e5;
    --level-high-border: #ecc4b8;
}

body {
    font-family: "Noto Sans JP", sans-serif;
    background-color: var(--foam);
    color: var(--ink-text);
}

h1, h2, h3, h4, h5, h6 {
    font-family: "Zen Kaku Gothic New", sans-serif;
    font-weight: 700;
    color: var(--river-ink);
}

/* ボタン（skybutton/greybuttonの後継。既存クラス名は互換のため残す） */
.btn-primary, input.skybutton {
    background: var(--rapids-teal);
    color: #fff;
    border: none;
    border-radius: 10px;
    padding: 0.7rem 1.4rem;
    font-weight: 700;
    font-size: 0.95rem;
    cursor: pointer;
}
.btn-primary:hover, input.skybutton:hover { background: #1a8a95; }

.btn-secondary, input.greybutton {
    background: #fff;
    color: var(--river-ink);
    border: 1.5px solid var(--border-soft);
    border-radius: 10px;
    padding: 0.7rem 1.4rem;
    font-weight: 700;
    font-size: 0.95rem;
    cursor: pointer;
}
.btn-secondary:hover, input.greybutton:hover { background: #f7f5ef; }

/* ヘッダー */
.site-header { background: var(--river-ink); }
.site-header-top {
    display: flex; align-items: center; justify-content: space-between;
    padding: 0.85rem 1.25rem; max-width: 1100px; margin: 0 auto;
}
.site-brand {
    display: flex; align-items: center; gap: 0.6rem; color: #fff; text-decoration: none;
    font-family: "Zen Kaku Gothic New", sans-serif; font-weight: 700; font-size: 1.1rem;
}
.site-brand:hover { color: #fff; text-decoration: none; }
.site-brand svg { width: 26px; height: 26px; fill: #fff; }
.site-header-actions { display: flex; gap: 0.6rem; }
.header-pill {
    padding: 0.4rem 0.95rem; border-radius: 999px; font-size: 0.82rem; font-weight: 700;
    text-decoration: none; border: 1px solid rgba(255,255,255,0.28); color: #fff;
}
.header-pill:hover { background: rgba(255,255,255,0.1); color: #fff; text-decoration: none; }
.header-pill.solid { background: var(--rapids-teal); border-color: var(--rapids-teal); }
.header-pill.solid:hover { background: #1a8a95; }

/* アイコンナビ */
.headerNav { background: var(--river-ink-light); width: 100%; padding: 0.4rem 0 0.7rem; }
.headerNav_list { width: 100%; margin: 0; padding: 0 0.75rem; max-width: 1100px; margin-left: auto; margin-right: auto; }
.headerNav_list li { width: 19.3%; padding: 0; display: inline-block; text-align: center; vertical-align: top; }
.headerNav_list li a {
    display: inline-flex; flex-direction: column; align-items: center; padding: 0.45rem 0.25rem;
    border-radius: 12px;
}
.headerNav_text { margin: 0.15rem 0 0; font-size: 0.72em; color: rgba(255,255,255,0.7); font-weight: 700; }
.headerNav_icon { width: 26px; height: 26px; opacity: 1; fill: rgba(255,255,255,0.7); }

@media screen and (max-width: 380px) {
    .headerNav_text { font-size: 0.62em; }
    .headerNav_icon { width: 22px; height: 22px; }
}

/* フッター */
.site-footer { color: var(--ink-muted); background: var(--foam); }
.site-footer hr { border-color: var(--border-soft); }