/* ==========================================================================
   認証ページ（ログイン・新規登録）専用スタイル
   ========================================================================== */
.auth-wrap {
    min-height: calc(100vh - var(--nav-h));
    display: grid;
    grid-template-columns: 1fr 1fr;
}
.auth-aside {
    position: relative;
    overflow: hidden;
    padding: 56px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    background:
        radial-gradient(circle at 82% 14%, rgba(255, 231, 158, .76), transparent 26%),
        radial-gradient(circle at 12% 88%, rgba(114, 190, 111, .22), transparent 34%),
        linear-gradient(160deg, #edf8f0 0%, #dceff2 58%, #e3f0d7 100%);
    border-right: 1px solid var(--border);
}
.auth-aside-inner { position: relative; z-index: 2; max-width: 420px; }
.auth-aside .eyebrow {
    font-family: var(--font-pixel);
    color: var(--gold); font-size: .82rem; letter-spacing: .14em;
    text-transform: uppercase; margin-bottom: 18px;
}
.auth-aside h2 {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 3.4vw, 2.6rem);
    line-height: 1.25; margin-bottom: 16px;
}
.auth-aside h2 .hl {
    background: linear-gradient(120deg, var(--mint), var(--sky));
    -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.auth-aside p { color: var(--ink-muted); font-size: 1.02rem; }
.auth-perks { margin-top: 28px; display: flex; flex-direction: column; gap: 14px; }
.auth-perk { display: flex; align-items: center; gap: 13px; font-size: .95rem; }
.auth-perk .ico {
    width: 40px; height: 40px; border-radius: 11px;
    display: grid; place-items: center; flex-shrink: 0;
    background: rgba(255,255,255,.72); border: 1px solid var(--border);
    font-size: 1.1rem;
}

/* 装飾の浮遊コイン群 */
.auth-aside .deco-coin {
    position: absolute; border-radius: 50%;
    background: radial-gradient(circle at 35% 30%, #fff3c4, var(--gold) 60%, #d99b00);
    box-shadow: var(--glow-gold); z-index: 1; opacity: .8;
}
.auth-aside .c1 { width: 60px; height: 60px; top: 12%; right: 14%; animation: bob 4s ease-in-out infinite; }
.auth-aside .c2 { width: 34px; height: 34px; bottom: 22%; right: 30%; animation: bob 3.2s ease-in-out infinite .5s; }
.auth-aside .c3 { width: 22px; height: 22px; top: 38%; right: 8%; animation: bob 2.8s ease-in-out infinite .8s; }

.auth-main {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 48px 24px;
}
.auth-card { width: 100%; max-width: 420px; }
.auth-card h1 {
    font-family: var(--font-display);
    font-size: 1.7rem; margin-bottom: 6px;
}
.auth-card .sub { color: var(--ink-muted); margin-bottom: 28px; font-size: .94rem; }
.auth-foot { text-align: center; margin-top: 22px; color: var(--ink-muted); font-size: .92rem; }
.auth-foot a { color: var(--primary); font-weight: 700; }
.auth-foot a:hover { text-decoration: underline; }

.auth-alert {
    background: rgba(244,127,104,.10);
    border: 1px solid rgba(220,101,79,.30);
    border-radius: 12px;
    padding: 12px 14px;
    color: #a94d3e;
    font-size: .9rem;
    margin-bottom: 20px;
    display: flex; align-items: center; gap: 9px;
}

@media (max-width: 880px) {
    .auth-wrap { grid-template-columns: 1fr; }
    .auth-aside { display: none; }
}