/* 認証画面の共通スタイル */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #8bc34a 0%, #7cb342 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 15px;
}

.auth-container {
    background: white;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    padding: 30px;
    max-width: 500px;
    width: 100%;
    animation: fadeIn 0.5s ease-in;
    max-height: 95vh;
    overflow-y: auto;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.auth-header {
    text-align: center;
    margin-bottom: 20px;
}

.auth-logo {
    font-size: 40px;
    margin-bottom: 5px;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.auth-title {
    color: #8bc34a;
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 3px;
}

.auth-subtitle {
    color: #666;
    font-size: 12px;
}

.auth-form {
    margin-top: 20px;
}

.form-group {
    margin-bottom: 12px;
}

.form-group label {
    display: block;
    color: #333;
    font-weight: 600;
    margin-bottom: 5px;
    font-size: 13px;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="number"] {
    width: 100%;
    padding: 10px 14px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 14px;
    transition: all 0.3s ease;
    font-family: inherit;
}

.form-group input:focus {
    outline: none;
    border-color: #8bc34a;
    box-shadow: 0 0 0 3px rgba(139, 195, 74, 0.1);
}

.form-group input::placeholder {
    color: #999;
}

/* 年齢、体重、身長を横並びにするスタイル */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 12px;
    margin-bottom: 12px;
}

.form-row .form-group {
    margin-bottom: 0;
}

.form-row .form-group label {
    font-size: 12px;
}

.form-row .form-group input {
    text-align: center;
    padding: 10px 8px;
    font-size: 14px;
}

.helptext {
    display: block;
    font-size: 11px;
    color: #666;
    margin-top: 3px;
    line-height: 1.3;
}

.helptext ul {
    margin: 3px 0;
    padding-left: 18px;
}

.helptext li {
    margin: 2px 0;
}

.error-message {
    background: #ffebee;
    border-left: 4px solid #f44336;
    color: #c62828;
    padding: 10px 14px;
    border-radius: 8px;
    margin-bottom: 15px;
    font-size: 13px;
}

.errorlist {
    list-style: none;
    padding: 0;
    margin: 4px 0 0 0;
}

.errorlist li {
    background: #ffebee;
    color: #c62828;
    padding: 6px 10px;
    border-radius: 6px;
    margin-top: 4px;
    font-size: 12px;
}

.remember-me {
    display: flex;
    align-items: center;
    margin: 15px 0;
}

.remember-me input[type="checkbox"] {
    width: 18px;
    height: 18px;
    margin-right: 8px;
    cursor: pointer;
}

.remember-me label {
    font-size: 14px;
    color: #666;
    cursor: pointer;
    user-select: none;
}

.btn-submit {
    width: 100%;
    padding: 12px;
    background: linear-gradient(135deg, #ff9800 0%, #f57c00 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 8px;
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 152, 0, 0.3);
}

.btn-submit:active {
    transform: translateY(0);
}

.auth-footer {
    text-align: center;
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid #e0e0e0;
}

.auth-footer p {
    color: #666;
    font-size: 13px;
    margin: 0;
}

.auth-footer a {
    color: #03a9f4;
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.auth-footer a:hover {
    color: #0288d1;
    text-decoration: underline;
}

/* レスポンシブ対応 */
@media (max-width: 480px) {
    .auth-container {
        padding: 30px 20px;
    }
    
    .auth-title {
        font-size: 24px;
    }
    
    .auth-logo {
        font-size: 50px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .form-row .form-group input {
        text-align: left;
    }
}