@charset "UTF-8";

/* --- Base & Accessibility --- */
:root {
    --main-color: #0056b3;
    --accent-color: #d64500;
    --text-color: #333333;
    --bg-color: #ffffff;
    --light-bg-color: #f4f7f9;
}

body {
    font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
    color: var(--text-color);
    background-color: var(--bg-color);
    line-height: 1.8;
    margin: 0;
    font-size: 112.5%;
    transition: font-size 0.3s ease;
}

body.text-large {
    font-size: 150%;
}

body.text-xlarge {
    font-size: 200%;
}

/* Skip Link */
.skip-link {
    position: absolute;
    top: -60px;
    left: 0;
    background: var(--main-color);
    color: white;
    padding: 10px 15px;
    z-index: 9999;
    text-decoration: none;
    font-weight: bold;
    transition: top 0.3s;
}

.skip-link:focus {
    top: 0;
}

/* Focus States */
a:focus,
button:focus,
input:focus,
.btn:focus {
    outline: 3px solid var(--accent-color);
    outline-offset: 2px;
}

/* --- Layout --- */
.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background-color: var(--bg-color);
    border-bottom: 1px solid #ddd;
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

header .header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    gap: 20px;
}

@media (max-width: 600px) {
    nav ul {
        flex-direction: column;
        align-items: center;
        width: 100%;
        gap: 10px;
    }
}

nav a {
    color: var(--main-color);
    text-decoration: none;
    font-weight: bold;
    padding: 5px 10px;
    display: block;
}

/* --- Component: Font Size Switcher --- */
.font-size-switcher {
    display: flex;
    gap: 10px;
    align-items: center;
}

.font-size-switcher span {
    font-weight: bold;
    font-size: 0.9rem;
}

.font-size-switcher button {
    background: #eee;
    border: 1px solid #ccc;
    cursor: pointer;
    padding: 5px 10px;
    border-radius: 4px;
    font-family: inherit;
}

.font-size-switcher button:hover {
    background: #ddd;
}

.font-size-switcher button.active {
    background: var(--main-color);
    color: white;
    border-color: var(--main-color);
}

/* --- Hero Section --- */
.hero {
    background-color: var(--light-bg-color);
    padding: 80px 0;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: var(--main-color);
    line-height: 1.3;
}

@media (max-width: 600px) {
    .hero h1 {
        font-size: 1.8rem;
    }
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* --- Buttons --- */
.btn {
    display: inline-block;
    background-color: var(--main-color);
    color: #fff;
    padding: 15px 40px;
    text-decoration: none;
    border-radius: 8px;
    font-weight: bold;
    font-size: 1.1rem;
    transition: background-color 0.3s, transform 0.1s;
    border: none;
    cursor: pointer;
}

.btn:hover {
    background-color: #004494;
    text-decoration: none;
}

.btn:active {
    transform: scale(0.98);
}

/* --- Images --- */
.img-placeholder {
    background-color: #ccc;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #555;
    font-weight: bold;
    margin: 30px auto;
    max-width: 100%;
    border-radius: 8px;
    object-fit: cover;
}

/* --- Sections --- */
section {
    padding: 80px 0;
}

@media (max-width: 600px) {
    section {
        padding: 50px 0;
    }
}

h2 {
    font-size: 2rem;
    border-left: 10px solid var(--main-color);
    padding-left: 15px;
    margin-bottom: 40px;
}

@media (max-width: 600px) {
    h2 {
        font-size: 1.6rem;
        border-left-width: 6px;
    }
}

/* --- Features Grid --- */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

@media (max-width: 600px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
}

.feature-card {
    background: #fff;
    border: 1px solid #ddd;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.feature-card h3 {
    color: var(--main-color);
    margin-top: 0;
}

/* --- Mission --- */
#mission .mission-text {
    font-size: 1.3rem;
    font-weight: bold;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    background: #eef4fb;
    padding: 50px;
    border-radius: 16px;
    line-height: 2;
}

@media (max-width: 600px) {
    #mission .mission-text {
        padding: 30px 20px;
        font-size: 1.1rem;
    }
}

/* --- Profile --- */
.profile-card {
    display: flex;
    background: white;
    border: 1px solid #ddd;
    border-radius: 12px;
    overflow: hidden;
    max-width: 800px;
    margin: 0 auto;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

@media (max-width: 600px) {
    .profile-card {
        flex-direction: column;
    }
}

.profile-card .profile-image {
    flex: 0 0 250px;
    background: #ddd;
}

.profile-card .profile-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.profile-card .profile-content {
    padding: 30px;
    flex: 1;
}

.profile-card .profile-content h3 {
    margin-top: 0;
    color: var(--main-color);
    display: flex;
    align-items: center;
    gap: 15px;
}

.profile-card .profile-content h3 a {
    font-size: 0.9rem;
    color: #3b5998;
    text-decoration: underline;
    font-weight: normal;
}

.profile-card .profile-content .profile-role {
    font-weight: bold;
    margin-bottom: 15px;
    display: block;
    color: #666;
}

.profile-card .profile-content .award {
    margin-top: 20px;
    padding-top: 15px;
    border-top: 1px solid #eee;
    font-weight: bold;
    color: var(--accent-color);
}

/* --- Contact --- */
#contact {
    text-align: center;
    background-color: var(--light-bg-color);
}

.contact-email {
    font-size: 1.5rem;
    font-weight: bold;
    margin: 30px 0;
}

.contact-email a {
    color: var(--main-color);
}

/* --- Footer --- */
footer {
    background-color: #333;
    color: #fff;
    padding: 40px 0;
    text-align: center;
}

footer a {
    color: #fff;
    text-decoration: underline;
}