*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    font-family: 'Noto Sans JP', sans-serif;
    line-height: 1.5;
    background-color: #080d1a;
    color: #e2e8f0;
}
h1, p { margin: 0; }
a { text-decoration: none; }

.wrap { width: 100%; max-width: 28rem; }

.serif-italic { font-family: 'Cinzel', serif; font-style: italic; }
.gold-border-box {
    border: 1.5px solid #d4af37;
    background: linear-gradient(180deg, #111a2e 0%, #0a101d 100%);
    box-shadow: 0 0 15px rgba(212, 175, 55, 0.15);
}
.gold-text {
    background: linear-gradient(135deg, #f3e5ab 0%, #d4af37 50%, #aa7c11 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.glass-card {
    background: rgba(13, 20, 36, 0.85);
    border: 1px solid rgba(212, 175, 55, 0.2);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8);
    border-radius: 1rem;
    padding: 2rem;
}
@media (min-width: 768px) { .glass-card { padding: 2.5rem; } }

.head {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid rgba(30, 41, 59, 0.8);
}
.logo-box {
    width: 3.5rem;
    height: 3.5rem;
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 0.75rem;
}
.logo-text { font-size: 1.25rem; line-height: 1.75rem; font-weight: 700; letter-spacing: -0.025em; }
.title { font-size: 1.125rem; line-height: 1.75rem; font-weight: 600; letter-spacing: 0.05em; margin-bottom: 0.25rem; }
@media (min-width: 768px) { .title { font-size: 1.25rem; } }
.subtitle { font-size: 11px; color: #94a3b8; letter-spacing: 0.1em; }

.notice {
    font-size: 0.75rem;
    color: #fcd34d;
    border: 1px solid rgba(245, 158, 11, 0.3);
    background: rgba(245, 158, 11, 0.1);
    border-radius: 0.5rem;
    padding: 0.75rem 1rem;
    margin-bottom: 1.25rem;
}

.form > * + * { margin-top: 1.25rem; }
.label {
    display: block;
    font-size: 0.75rem;
    font-weight: 500;
    color: #cbd5e1;
    margin-bottom: 0.5rem;
    letter-spacing: 0.025em;
}
.input-style {
    width: 100%;
    background: rgba(6, 10, 20, 0.9);
    border: 1px solid rgba(212, 175, 55, 0.25);
    color: #ffffff;
    border-radius: 0.5rem;
    padding: 0.75rem 1rem;
    font-family: inherit;
    font-size: 0.875rem;
    line-height: 1.25rem;
    transition: all 0.15s ease;
}
.input-style::placeholder { color: #475569; }
.input-style:focus {
    border-color: #d4af37;
    box-shadow: 0 0 10px rgba(212, 175, 55, 0.25);
    outline: none;
}
.pw-wrap { position: relative; }
.pw-input { padding-right: 2.5rem; }
.pw-toggle {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: 0;
    padding: 0;
    cursor: pointer;
    color: #94a3b8;
}
.pw-toggle:hover { color: #e2e8f0; }
.pw-toggle svg { width: 1rem; height: 1rem; display: block; }

.row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.75rem;
    padding-top: 0.25rem;
}
.remember { display: flex; align-items: center; color: #94a3b8; cursor: pointer; }
.remember input {
    width: 0.875rem;
    height: 0.875rem;
    margin: 0 0.5rem 0 0;
    accent-color: #d97706;
}
.link-amber { color: #fbbf24; transition: color 0.15s ease; }
.link-amber:hover { color: #fcd34d; }

.btn-gold {
    display: block;
    width: 100%;
    margin-top: 0.5rem;
    padding: 0.875rem 1rem;
    border: 0;
    border-radius: 0.5rem;
    font-family: inherit;
    font-weight: 500;
    font-size: 0.875rem;
    cursor: pointer;
    background: linear-gradient(135deg, #c59b27 0%, #9a7412 100%);
    color: #ffffff;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    transition: all 0.2s ease;
}
.btn-gold:hover {
    background: linear-gradient(135deg, #d4af37 0%, #ab8218 100%);
    box-shadow: 0 0 15px rgba(212, 175, 55, 0.3);
}
.btn-gold:active { transform: scale(0.99); }

.register {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(30, 41, 59, 0.8);
    text-align: center;
}
.register-lead { font-size: 0.75rem; color: #94a3b8; margin-bottom: 0.75rem; }
.register-link {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 500;
    color: #fcd34d;
    border: 1px solid rgba(245, 158, 11, 0.3);
    background: rgba(245, 158, 11, 0.1);
    padding: 0.625rem 1.25rem;
    border-radius: 0.375rem;
    transition: color 0.15s ease;
}
.register-link:hover { color: #fde68a; }

.copy { margin-top: 2rem; text-align: center; }
.copy p { font-size: 10px; color: #64748b; letter-spacing: 0.05em; }