/* 全ページ共通のヘッダー・フッター (MTTG)
   アプリ画面 (スクリーナー・ダッシュボード) にも差し込むので、クラスはすべて mt- で始め、
   各ページの CSS (header.top / footer / a / ul など) の影響を受けないよう必要な値は明示する */
:root {
  --mt-bg: #070b12; --mt-bg-2: #0b111c; --mt-line: rgba(255,255,255,.09); --mt-line-2: rgba(255,255,255,.16);
  --mt-ink: #eef3f9; --mt-ink-2: #9aa8ba; --mt-ink-3: #66758a;
  --mt-cyan: #38e1ff; --mt-violet: #8b7bff; --mt-mint: #3ef0a6;
  --mt-grad: linear-gradient(120deg, #38e1ff 0%, #8b7bff 100%);
  --mt-font: "Inter", "Noto Sans JP", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", Meiryo, sans-serif;
  --mt-mono: "JetBrains Mono", ui-monospace, Menlo, monospace;
}
.mt-hd, .mt-ft {
  font-family: var(--mt-font); font-size: 14px; line-height: 1.6; color: var(--mt-ink); letter-spacing: normal;
  -webkit-font-smoothing: antialiased; text-align: left; box-sizing: border-box;
}
.mt-hd *, .mt-ft * { box-sizing: border-box; }
.mt-hd a, .mt-ft a { color: inherit; text-decoration: none; }
.mt-hd :focus-visible, .mt-ft :focus-visible { outline: 2px solid var(--mt-cyan); outline-offset: 3px; border-radius: 4px; }

/* ---------- ヘッダー ---------- */
.mt-hd {
  position: sticky; top: 0; z-index: 50; width: 100%;
  background: rgba(7,11,18,.72); border-bottom: 1px solid var(--mt-line);
  backdrop-filter: blur(14px) saturate(140%); -webkit-backdrop-filter: blur(14px) saturate(140%);
}
.mt-hd--static { position: relative; background: var(--mt-bg); }
.mt-hd-in { width: min(1160px, 100%); margin: 0 auto; padding: 0 24px; height: 64px; display: flex; align-items: center; gap: 20px; }
.mt-logo { display: flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: .04em; font-size: 16px; color: var(--mt-ink); flex: none; }
.mt-mark {
  width: 30px; height: 30px; border-radius: 8px; background: var(--mt-grad); display: grid; place-items: center;
  box-shadow: 0 0 24px rgba(56,225,255,.35);
}
.mt-mark svg { display: block; }
.mt-logo small { font-weight: 500; color: var(--mt-ink-2); font-size: 12px; letter-spacing: .08em; }

.mt-nav { margin-left: auto; display: flex; align-items: center; gap: 4px; }
.mt-nav > a.mt-link {
  position: relative; padding: 8px 12px; border-radius: 8px; color: var(--mt-ink-2); font-size: 14px; font-weight: 500;
  transition: color .2s, background .2s;
}
.mt-nav > a.mt-link:hover { color: var(--mt-ink); background: rgba(255,255,255,.05); }
.mt-nav > a.mt-link.is-active { color: var(--mt-ink); }
.mt-nav > a.mt-link.is-active::after {
  content: ""; position: absolute; left: 12px; right: 12px; bottom: 2px; height: 2px; border-radius: 2px; background: var(--mt-grad);
}
.mt-sep { width: 1px; height: 22px; background: var(--mt-line-2); margin: 0 10px; }
.mt-user { color: var(--mt-ink-2); font-size: 13px; margin-right: 6px; max-width: 12em; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mt-user::before { content: ""; display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--mt-mint); margin-right: 7px; vertical-align: 1px; box-shadow: 0 0 8px var(--mt-mint); }
.mt-nav form { margin: 0; display: inline; }
.mt-btn {
  display: inline-flex; align-items: center; gap: 6px; padding: 7px 14px; border-radius: 8px; font: 700 13px/1.4 var(--mt-font);
  border: 1px solid var(--mt-line-2); background: rgba(255,255,255,.04); color: var(--mt-ink); cursor: pointer;
  white-space: nowrap; transition: border-color .2s, transform .2s, background .2s; margin: 0;
}
.mt-btn:hover { border-color: rgba(255,255,255,.32); transform: translateY(-1px); }
.mt-btn--grad { background: var(--mt-grad); color: #061018; border-color: transparent; box-shadow: 0 6px 20px -8px rgba(56,225,255,.6); }

/* スマホ: メニューボタンで開閉 (JS なし) */
.mt-toggle { position: absolute; opacity: 0; pointer-events: none; }
.mt-burger { display: none; margin-left: auto; width: 40px; height: 40px; border-radius: 10px; border: 1px solid var(--mt-line-2); cursor: pointer; place-items: center; }
.mt-burger span, .mt-burger span::before, .mt-burger span::after { display: block; width: 18px; height: 2px; border-radius: 2px; background: var(--mt-ink); position: relative; transition: transform .25s, background .25s; }
.mt-burger span::before, .mt-burger span::after { content: ""; position: absolute; left: 0; }
.mt-burger span::before { top: -6px; } .mt-burger span::after { top: 6px; }
.mt-toggle:focus-visible + .mt-burger { outline: 2px solid var(--mt-cyan); outline-offset: 3px; }
.mt-toggle:checked + .mt-burger span { background: transparent; }
.mt-toggle:checked + .mt-burger span::before { transform: translateY(6px) rotate(45deg); }
.mt-toggle:checked + .mt-burger span::after { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 900px) {
  .mt-hd-in { padding: 0 16px; height: 58px; }
  .mt-burger { display: grid; }
  .mt-nav {
    display: none; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 2px;
    padding: 10px 16px 18px; background: rgba(7,11,18,.97); border-bottom: 1px solid var(--mt-line);
  }
  .mt-toggle:checked ~ .mt-nav { display: flex; }
  .mt-nav > a.mt-link { padding: 12px 10px; font-size: 15px; }
  .mt-nav > a.mt-link.is-active::after { left: 0; right: auto; top: 12px; bottom: 12px; width: 3px; height: auto; }
  .mt-sep { width: auto; height: 1px; margin: 8px 0; }
  .mt-user { margin: 4px 10px 8px; }
  .mt-nav .mt-btn { justify-content: center; padding: 11px 14px; font-size: 14px; width: 100%; }
}
@media (max-width: 420px) { .mt-logo small { display: none; } }

/* ---------- フッター ---------- */
.mt-ft {
  position: relative; background: var(--mt-bg); color: var(--mt-ink-2); border-top: 1px solid var(--mt-line);
  margin: 0; padding: 0; font-size: 13px; display: block; overflow: hidden;
}
.mt-ft::before {
  content: ""; position: absolute; top: 0; left: 50%; width: min(900px, 90%); height: 1px; transform: translateX(-50%);
  background: linear-gradient(90deg, transparent, rgba(56,225,255,.6), rgba(139,123,255,.6), transparent);
}
.mt-ft-in {
  width: min(1160px, 100%); margin: 0 auto; padding: 56px 24px 36px;
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 36px;
}
.mt-ft-brand p { margin: 14px 0 0; color: var(--mt-ink-2); font-size: 13px; line-height: 1.8; max-width: 300px; }
.mt-ft-h { margin: 0 0 12px; font: 500 11px/1.4 var(--mt-mono); letter-spacing: .16em; text-transform: uppercase; color: var(--mt-ink-3); }
.mt-ft ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 9px; }
.mt-ft li { margin: 0; padding: 0; }
.mt-ft li a { color: var(--mt-ink-2); font-size: 13.5px; transition: color .2s; }
.mt-ft li a:hover { color: var(--mt-ink); }
.mt-ft-bottom {
  width: min(1160px, 100%); margin: 0 auto; padding: 20px 24px 36px; border-top: 1px solid var(--mt-line);
  display: flex; gap: 12px 32px; justify-content: space-between; align-items: flex-start; flex-wrap: wrap;
}
.mt-ft-bottom p { margin: 0; font-size: 12px; line-height: 1.8; color: var(--mt-ink-3); }
.mt-ft-bottom .mt-disc { flex: 1 1 520px; max-width: 760px; }
.mt-ft-bottom .mt-copy { font-family: var(--mt-mono); white-space: nowrap; }
.mt-ft-bottom a { color: var(--mt-ink-2); }
@media (max-width: 900px) {
  .mt-ft-in { grid-template-columns: 1fr 1fr; gap: 32px 24px; padding: 44px 16px 28px; }
  .mt-ft-brand { grid-column: 1 / -1; }
  .mt-ft-bottom { padding: 18px 16px 32px; }
}
@media (max-width: 520px) { .mt-ft-in { grid-template-columns: 1fr; } }
@media (prefers-reduced-motion: reduce) { .mt-hd *, .mt-ft * { transition: none !important; } }