@import url('https://fonts.googleapis.com/css2?family=Comfortaa:wght@300..700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Comfortaa:wght@300..700&family=Noto+Sans+JP:wght@100..900&display=swap');
@import url("reset.css");
@import url("https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.7.2/css/all.min.css");

:root {
    --text: #3A4C95;
    --text-rgb: 58, 76, 149;
    --sub-text: #FFF;
    --sub-text-rgb: 255, 255, 255;
    --bg: #F0EEFA;
    --primary: #FF3A95;
    --secondary: #1E90FF;

    --content-width: 48rem /* 768px */;
    --content-margin-xxxs: 0.25rem /* 4px */;
    --content-margin-xxs: 0.5rem /* 8px */;
    --content-margin-xs: 1rem /* 16px */;
    --content-margin-sm: 1.5rem /* 24px */;
    --content-margin-md: 2.5rem /* 40px */;
    --content-margin-lg: 3rem /* 48px */;
    --content-margin-xl: 3.5rem /* 56px */;
    --content-margin-xxl: 5rem /* 80px */;

    --font-family-header: "Comfortaa", sans-serif;
    --font-size-xs: 0.75rem /* 12px */;
    --font-size-sm: 0.875rem /* 14px */;
    --font-size-md: 1rem /* 16px */;
    --font-size-lg: 1.25rem /* 20px */;
    --font-size-xl: 1.5rem /* 24px */;

    --letter-spacing-xs: 0.03rem;
    --letter-spacing-sm: 0.05rem;
    --letter-spacing-md: 0.08rem;
    --letter-spacing-lg: 0.1rem;

    --line-height-md: 1.7;
}

/***** HTML *****/
html {
    font-family: "Noto Sans JP", sans-serif;
    font-optical-sizing: auto;
    font-weight: 400;
    font-style: normal;
}
body {
    margin: 0;
    background-color: var(--bg);
    color: var(--text);
    font-size: 16px;
    letter-spacing: 0.0914rem;
}
a {
    text-decoration: none;
    transition: color 0.3s ease;
}

/***** Container *****/
#main_container {
    display: flex;
    flex-direction: column;
    gap: var(--content-margin-md);
    margin: 0 auto;
    max-width: var(--content-width);
    min-height: 100vh;
    box-shadow: rgba(230, 227, 245, 0.8) 0rem 0.125rem 1rem 1rem;
}

/***** Header *****/
#header {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex-shrink: 0;
}
#header #header_inner {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--content-margin-xxxs);
    width: 100%;
    padding-block-start: var(--content-margin-sm);
    padding-block-end: var(--content-margin-xs);
    background: linear-gradient(to right, var(--primary), var(--secondary));
}
#header #header_inner span {
    color: var(--sub-text);
    font-family: var(--font-family-header);
    font-optical-sizing: auto;
    font-size: var(--font-size-lg);
    font-weight: 400;
    font-style: normal;
    letter-spacing: var(--letter-spacing-md);
}
#header #header_inner h1 {
    color: var(--sub-text);
    font-size: var(--font-size-xs);
    font-weight: 400;
    letter-spacing: var(--letter-spacing-md);
}
#header #header_inner a,
#header #header_inner p {
    color: var(--sub-text);
}
#header #header_inner a:hover {
    color: rgba(var(--sub-text-rgb), 0.64);
}
#header nav {
    display: flex;
    width: 100%;
    height: var(--content-margin-lg);
    background-color: rgb(var(--sub-text-rgb));
}
#header nav ul {
    display: flex;
    width: 100%;
    margin-inline: var(--content-margin-sm);
    overflow-x: auto;
    scrollbar-width: none;
}
#header nav ul::-webkit-scrollbar {
    display: none;
}
#header nav ul li {
    flex-shrink: 0;
    min-width: var(--content-margin-xl);
}
#header nav ul li a {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
    color: var(--text);
    font-size: var(--font-size-xs);
    letter-spacing: var(--letter-spacing-xs);
}
#header nav ul li a:hover {
    color: var(--secondary);
}
#header nav ul li a.current {
    border-bottom: solid 0.0625rem var(--secondary);
    color: var(--secondary);
    font-weight: 600;
}

/***** Main *****/
main {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: var(--content-margin-sm);
    flex: 1;
}
main header {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--content-margin-xxxs);
}
main header p {
    width: 100%;
    color: rgba(var(--text-rgb), 0.64);
    font-size: var(--font-size-xs);
    font-weight: 500;
    letter-spacing: var(--letter-spacing-md);
    text-align: center;
}
main h2 {
    font-family: var(--font-family-header);
    font-size: var(--font-size-lg);
    font-weight: 500;
    font-style: normal;
    letter-spacing: var(--letter-spacing-md);
    background: linear-gradient(
        to right,
        var(--primary),
        var(--secondary)
    );
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
main article {
    display: flex;
    flex-direction: column;
    gap: var(--content-margin-xs);
    margin-inline: var(--content-margin-xl);
}
#main article section {
    display: flex;
    flex-direction: column;
    gap: var(--content-margin-xxxs);
    padding: var(--content-margin-xs);
    border-style: solid;
    border-width: 0.0625rem;
    border-color: rgba(var(--sub-text-rgb), 0.64);
    border-radius: var(--content-margin-xs);
    background: linear-gradient(
        to top,
        rgba(var(--sub-text-rgb), 0.56),
        rgba(var(--sub-text-rgb), 0.08)
    );
    box-shadow: rgba(230, 227, 245, 0.24) 0rem 0.25rem 0.125rem 0.125rem;
}
#main article section .section_meta {
    display: flex;
    flex-direction: row;
    gap: var(--content-margin-xs);
    margin-block-start: var(--content-margin-xxs);
}
#main article section span,
#main article section p,
#main article section time {
    color: rgba(var(--text-rgb), 0.64);
    font-size: var(--font-size-xs);
    font-weight: 500;
    letter-spacing: var(--letter-spacing-xs);
}
#main article section h3 {
    font-size: 0.9375rem;
    letter-spacing: var(--letter-spacing-sm);
}
#main article section h3 a {
    color: var(--text);
}
#main article section h3 a:hover {
    color: var(--secondary);
}
#main article section a.tag {
    color: var(--secondary);
    font-size: var(--font-size-xs);
    letter-spacing: var(--letter-spacing-xs);
}
#main article section a.tag:hover {
    color: rgba(30, 144, 255, 0.64);
}

/* Privacy Policy */
#privacy_policy section {
    display: flex;
    flex-direction: column;
    gap: var(--content-margin-sm);
}
#privacy_policy section h3, #privacy_policy section h4 {
    margin-block-end: var(--content-margin-xxxs);
    font-size: var(--font-size-sm);
    letter-spacing: var(--letter-spacing-sm);
    font-weight: 400;
}
#privacy_policy section ol {
    display: flex;
    flex-direction: column;
    gap: var(--content-margin-sm);
    padding-inline-start: 1.5rem;
    font-size: var(--font-size-sm);
}
#privacy_policy section ul {
    margin-block-start: -1rem;
    display: flex;
    flex-direction: column;
    gap: var(--content-margin-xxs);
    font-size: var(--font-size-sm);
}
#privacy_policy section ol li {
    padding-inline-start: 0;
}
#privacy_policy section p {
    font-size: var(--font-size-sm);
    letter-spacing: var(--letter-spacing-sm);
    line-height: var(--line-height-md);
}
#privacy_policy section a {
    margin-block: var(--content-margin-xxs);
    display: block;
    color: var(--secondary);
    text-align: right;
}

/***** Footer *****/
#footer {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    flex-shrink: 0;
    background: linear-gradient(to right, var(--primary), var(--secondary));
}
#footer #footer_inner {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--content-margin-xs);
    max-width: 80%;
    margin-block: var(--content-margin-md);
}
#footer a,
#footer span,
#footer small {
    color: var(--sub-text);
}
#footer a:hover {
    color: rgba(var(--sub-text-rgb), 0.64);
}
#footer p {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--content-margin-xxxs);
}
#footer p a {
    font-family: "Comfortaa", sans-serif;
    font-optical-sizing: auto;
    font-size: var(--font-size-lg);
    font-weight: 400;
    font-style: normal;
    letter-spacing: var(--letter-spacing-md);
}
#footer p span {
    font-size: var(--font-size-xs);
    letter-spacing: var(--letter-spacing-md);
}
#footer #footer_inner div {
    display: flex;
    flex-direction: column;
    gap: var(--content-margin-xxs);
}
#footer ul {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--content-margin-xxs);
}
#footer ul li {
    font-size: var(--font-size-xs);
    letter-spacing: var(--letter-spacing-xs);
}
#footer small {
    font-size: var(--font-size-xs);
    letter-spacing: var(--letter-spacing-md);
}

@media (max-width: 768px) {
    #main article {
        margin-inline: var(--content-margin-sm);
    }
}