/* ttr 共通スタイル（/zemi, /kisozemi と同系統のダークカラーリング） */
:root{
  --bg:#0d1117;
  --bg-card:#131920;
  --border:#ffffff14;
  --border-soft:#ffffff0e;
  --text:#f2f2f7;
  --text-body:#d1d1d6;
  --text-secondary:#8e8e93;
  --text-tertiary:#636366;
  --text-quaternary:#48484a;
  --blue:#0a84ff;
  --blue-light:#5ac8fa;
  --green:#30d158;
  --orange:#ff9f0a;
  --purple:#bf5af2;
  --red:#ff453a;
}

*{box-sizing:border-box;margin:0;padding:0}
body{font-family:'Noto Sans JP',sans-serif;background:var(--bg);color:var(--text);min-height:100vh}

/* ── ナビ ── */
.nav{background:var(--bg-card);padding:14px 20px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border-soft)}
.nav-back{color:var(--blue-light);font-size:14px;font-weight:500;text-decoration:none;display:flex;align-items:center;gap:5px}
.nav-back:hover{color:#fff}
.nav-title{flex:1;text-align:center;color:var(--text);font-size:15px;font-weight:600;padding-right:60px}
.nav-link{color:var(--blue-light);font-size:13px;font-weight:600;text-decoration:none;background:none;border:none;cursor:pointer;font-family:inherit}
.nav-link:hover{color:#fff}

/* ── ヒーロー ── */
.hero{position:relative;background:linear-gradient(160deg,#131b26,#0e1420 65%);color:var(--text);text-align:center;padding:44px 24px 36px;border-bottom:1px solid var(--border-soft);overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:
  radial-gradient(480px 260px at 20% -20%,#0a84ff26,transparent 60%),
  radial-gradient(420px 260px at 100% 10%,#bf5af222,transparent 55%);pointer-events:none}
.hero>*{position:relative}
.hero-title{font-size:24px;font-weight:800;letter-spacing:-0.3px;margin-bottom:10px;line-height:1.35}
.hero-sub{font-size:13px;color:#9a9aa2;line-height:1.8;max-width:520px;margin:0 auto}

.main{max-width:680px;margin:0 auto;padding:24px 16px 80px}

/* ── カード／ボタン ── */
.card,.card-link{background:var(--bg-card);border-radius:16px;padding:20px;border:1px solid var(--border-soft)}
.card-link{display:block;text-decoration:none;color:inherit;transition:border-color .15s,transform .15s}
.card-link:hover{border-color:#0a84ff55;transform:translateY(-1px)}
.card-icon{font-size:34px;margin-bottom:12px}
.card-title{font-size:18px;font-weight:800;margin-bottom:6px;display:flex;align-items:center;gap:8px;color:var(--text)}
.card-desc{font-size:13px;color:var(--text-secondary);line-height:1.7}
.hidden{display:none !important}

.btn{background:linear-gradient(135deg,#0a84ff,#5ac8fa);color:#001a33;border:none;border-radius:10px;padding:12px 18px;font-size:14px;font-weight:800;cursor:pointer;font-family:inherit;transition:filter .15s}
.btn:hover{filter:brightness(1.08)}
.btn:disabled{background:var(--text-quaternary);color:var(--text-secondary);cursor:not-allowed;filter:none}
.btn-sm{padding:8px 14px;font-size:12.5px}
.btn-ghost{background:#ffffff08;border:1px solid var(--border);color:var(--text-body);border-radius:10px;padding:10px 16px;font-size:13px;font-weight:600;cursor:pointer;font-family:inherit}
.btn-ghost:hover{border-color:#0a84ff55;color:var(--blue-light)}
.btn-danger{background:#ff453a22;color:var(--red);border:1px solid #ff453a55;border-radius:10px;padding:8px 14px;font-size:12.5px;font-weight:700;cursor:pointer;font-family:inherit}
.btn-danger:hover{background:#ff453a33}

/* ── フォーム ── */
.field-label{font-size:12px;font-weight:700;color:var(--text-secondary);margin-bottom:6px;display:block}
.field-input,.field-select,.field-textarea{width:100%;background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:10px 12px;font-size:14px;font-family:inherit;outline:none;color:var(--text)}
.field-input:focus,.field-select:focus,.field-textarea:focus{border-color:#0a84ff88;box-shadow:0 0 0 3px #0a84ff22}
.field-input::placeholder,.field-textarea::placeholder{color:var(--text-tertiary)}
.field-textarea{resize:vertical;line-height:1.6}

.center-msg{text-align:center;padding:40px 20px;color:var(--text-secondary)}
.center-msg .card-icon{font-size:40px;margin-bottom:14px}

.save-status{font-size:12px;font-weight:600;margin-top:8px;min-height:16px}
.save-status.ok,.save-ok{color:var(--green)}
.save-status.err,.save-err{color:var(--red)}

/* ── モーダル ── */
.modal-bg{position:fixed;inset:0;background:#000000aa;display:none;align-items:center;justify-content:center;z-index:100;padding:20px}
.modal-bg.show{display:flex}
.modal{background:var(--bg-card);border:1px solid var(--border);border-radius:16px;padding:22px;width:90%;max-width:380px;max-height:80vh;overflow-y:auto}
.modal h3{font-size:16px;font-weight:800;margin-bottom:14px;color:var(--text)}

/* ── タブ ── */
.tabs{display:flex;background:var(--bg);border:1px solid var(--border-soft);border-radius:10px;padding:3px;margin-bottom:18px}
.tab{flex:1;padding:9px;text-align:center;font-size:13px;font-weight:700;color:var(--text-secondary);border-radius:8px;cursor:pointer;border:none;background:none;font-family:inherit}
.tab.active{background:var(--bg-card);color:var(--blue-light);box-shadow:0 0 0 1px var(--border)}

footer{text-align:center;padding:28px 24px 40px;font-size:12px;color:var(--text-tertiary)}