/*
 * 未認証画面（ログイン・アカウント登録）。
 * 装飾は最小限にして、フォームだけに集中できるようにする。
 */

/*
 * メッシュグラデーション。
 * 大きく広がる楕円を複数重ね、色同士を滑らかに混ぜて単調さをなくす。
 */
.auth-shell {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
    overflow: hidden;
    background-color: #0c4a6e;
    background-image:
        radial-gradient(at 0% 0%, #0ea5e9 0px, transparent 50%),
        radial-gradient(at 80% 10%, #22d3ee 0px, transparent 45%),
        radial-gradient(at 100% 40%, #0369a1 0px, transparent 50%),
        radial-gradient(at 60% 60%, #075985 0px, transparent 55%),
        radial-gradient(at 20% 70%, #38bdf8 0px, transparent 45%),
        radial-gradient(at 90% 95%, #0c4a6e 0px, transparent 50%),
        radial-gradient(at 0% 100%, #082f49 0px, transparent 50%);
}

.auth-card {
    width: 100%;
    max-width: 400px;
}

/* カード内の見出し。ブランド名を主役にし、下に用途を添える */
.auth-brand {
    margin-bottom: 1.75rem;
    text-align: center;
}

.auth-brand-name {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    color: #0c4a6e;
    font-size: 1.75rem;
    font-weight: 400;
    letter-spacing: 0.02em;
}

.auth-brand-name .brand-fish-icon {
    width: 45px;
    height: 45px;
    flex-shrink: 0;
}

.auth-brand-lead {
    display: block;
    margin-top: 0.4rem;
    color: #6b7280;
    font-size: 0.875rem;
    font-weight: 400;
}

.auth-box {
    position: relative;
    padding: 2.5rem 2rem 2rem;
    background: #fff;
    border-radius: 1rem;
    /* 濃い背景から浮かせる。近い影と遠い影を重ねて柔らかく見せる */
    box-shadow:
        0 1px 2px rgba(2, 27, 43, 0.1),
        0 12px 24px rgba(2, 27, 43, 0.18),
        0 32px 64px rgba(2, 27, 43, 0.28);
}

.auth-card .form-label {
    color: #374151;
    font-size: 0.875rem;
    font-weight: 500;
}

.auth-card .form-control {
    padding: 0.55rem 0.75rem;
    border-color: #d1d5db;
}

.auth-card .form-control:focus {
    border-color: #38bdf8;
    box-shadow: 0 0 0 0.2rem rgba(14, 165, 233, 0.15);
}

.auth-card .form-check-label {
    color: #374151;
    font-size: 0.875rem;
}

.auth-submit {
    padding: 0.55rem;
    font-weight: 600;
    background-color: #0284c7;
    border-color: #0284c7;
}

.auth-submit:hover,
.auth-submit:focus {
    background-color: #0369a1;
    border-color: #0369a1;
}

/* 補助リンクは控えめに置く */
.auth-links {
    margin-top: 1.25rem;
    text-align: center;
}

.auth-links .btn-link {
    color: #4b5563;
    font-size: 0.875rem;
    text-decoration: none;
}

.auth-links .btn-link:hover {
    color: #111827;
    text-decoration: underline;
}

/* カード下の規約リンク。濃い背景に載るので白系にする */
.auth-footer {
    margin-top: 1.25rem;
    text-align: center;
    font-size: 0.8125rem;
}

.auth-footer a {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
}

.auth-footer a:hover {
    color: #fff;
    text-decoration: underline;
}

.auth-footer-sep {
    margin: 0 0.6rem;
    color: rgba(255, 255, 255, 0.4);
}

/* ============ 規約ページ ============ */
/* 読み物なので白基調。上端の帯だけログイン画面と色を合わせる */
.legal-shell {
    min-height: 100vh;
    padding: 3rem 1rem;
    background-color: #f8fafc;
    border-top: 4px solid;
    border-image: linear-gradient(90deg, #0ea5e9 0%, #22d3ee 50%, #0369a1 100%) 1;
}

.legal-card {
    max-width: 760px;
    margin: 0 auto;
    padding: 2.5rem;
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 1rem;
    box-shadow: 0 1px 3px rgba(15, 23, 42, 0.06);
}

.legal-title {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #e5e7eb;
    color: #111827;
    font-size: 1.5rem;
    font-weight: 700;
}

.legal-back {
    margin-top: 2.5rem;
    padding-top: 1.25rem;
    border-top: 1px solid #e5e7eb;
    font-size: 0.875rem;
}

.legal-back a {
    color: #0369a1;
    text-decoration: none;
}

.legal-back a:hover {
    text-decoration: underline;
}

/* 画面の目的を一行で伝える説明文（パスワード再設定など） */
.auth-lead {
    margin-bottom: 1.5rem;
    color: #4b5563;
    font-size: 0.875rem;
    line-height: 1.7;
}