* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    min-height: 100%;
}

body {
    font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
    background:
        radial-gradient(circle at top left, rgba(37, 99, 235, 0.25), transparent 34%),
        radial-gradient(circle at bottom right, rgba(14, 165, 233, 0.18), transparent 32%),
        linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
    color: #1f2937;
}

.login-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ヘッダー帯 */

.top-header {
    width: 100%;
    background: #ffffff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.12);
}

.header-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 8px 24px;
    text-align: center;
}

.header-logo {
    display: inline-block;
    width: 100%;
    max-width: 620px;
    height: auto;
}

/* メイン */

.login-main {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 56px 20px;
}

.login-card {
    width: 100%;
    max-width: 460px;
    padding: 42px 38px;
    background: rgba(255, 255, 255, 0.97);
    border-radius: 24px;
    box-shadow: 0 24px 70px rgba(0, 0, 0, 0.35);
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-badge {
    display: inline-block;
    padding: 6px 14px;
    margin-bottom: 14px;
    background: #2563eb;
    color: #fff;
    border-radius: 999px;
    font-size: 12px;
    font-weight: bold;
    letter-spacing: 2px;
}

.login-header h1 {
    margin: 0 0 10px;
    font-size: 28px;
    font-weight: 700;
    color: #0f172a;
}

.login-header p {
    margin: 0;
    font-size: 14px;
    color: #64748b;
}

.login-error {
    margin-bottom: 20px;
    padding: 12px 14px;
    background: #fef2f2;
    border-left: 4px solid #dc2626;
    border-radius: 10px;
    color: #b91c1c;
    font-size: 14px;
    font-weight: bold;
}

/* フォーム */

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: bold;
    color: #334155;
}

.form-group input {
    width: 100%;
    height: 50px;
    padding: 0 14px;
    border: 1px solid #cbd5e1;
    border-radius: 12px;
    font-size: 15px;
    outline: none;
    transition: all 0.2s ease;
}

.form-group input:focus {
    border-color: #2563eb;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.15);
}

.login-button {
    width: 100%;
    height: 54px;
    margin-top: 10px;
    border: none;
    border-radius: 14px;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    color: #fff;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s ease;
}

.login-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 24px rgba(37, 99, 235, 0.35);
}

/* フッター */

.login-footer {
    padding: 46px 20px 40px;
    color: #e5eefc;
    text-align: center;
    font-size: 13px;
}

.footer-inner {
    max-width: 920px;
    margin: 0 auto;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.25);
}

.footer-title {
    display: inline-block;
    margin: 0 0 18px;
    padding: 8px 22px;
    border-radius: 999px;
    background: rgba(37, 99, 235, 0.35);
    color: #ffffff;
    font-weight: bold;
    font-size: 15px;
}

.login-footer p {
    margin: 6px 0;
    line-height: 1.8;
}

.footer-contact-block {
    max-width: 760px;
    margin: 22px auto 0;
    padding: 18px 22px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 16px;
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.18);
}

.footer-contact-title {
    margin: 0 0 10px !important;
    color: #ff6b6b;
    font-size: 15px !important;
    font-weight: bold;
}

.login-footer a {
    color: #7dd3fc;
    font-weight: bold;
}

.footer-note {
    max-width: 860px;
    margin: 28px auto 0 !important;
    color: #cbd5e1;
    font-size: 12px;
}

.copyright {
    margin-top: 18px !important;
    color: #94a3b8;
    font-size: 12px;
}

/* スマホ */

@media (max-width: 768px) {
    .header-inner {
        padding: 14px 16px;
    }

    .header-logo {
        max-width: 100%;
    }

    .login-main {
        padding: 40px 16px;
        align-items: flex-start;
    }

    .login-card {
        padding: 32px 24px;
        border-radius: 20px;
    }

    .login-header h1 {
        font-size: 24px;
    }

    .login-footer {
        font-size: 12px;
    }
}