/*
 * CSS Custom Properties (Variables)
 * Design tokens for consistent styling.
 */
:root {
    --color-primary: #005A9C;
    --color-primary-dark: #003F6B;
    --color-secondary: #EAF4FC;
    --color-text: #333;
    --color-text-light: #666;
    --color-white: #FFFFFF;
    --color-border: #E0E0E0;
    --color-error: #D32F2F;
    --color-success: #2E7D32;

    --font-family-base: 'Helvetica Neue', 'Helvetica', 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Arial', 'Yu Gothic', 'Meiryo', sans-serif;
    
    --space-xs: 0.5rem;  /* 8px */
    --space-sm: 1rem;    /* 16px */
    --space-md: 1.5rem;  /* 24px */
    --space-lg: 2rem;    /* 32px */
    --space-xl: 3rem;    /* 48px */
    --space-xxl: 5rem;   /* 80px */

    --content-width: 1100px;
    --border-radius: 8px;
    --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);

    --header-height: 80px;
}

/*
 * Reset and Base Styles
 */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
}

body {
    margin: 0;
    font-family: var(--font-family-base);
    color: var(--color-text);
    background-color: var(--color-white);
    line-height: 1.7;
}

img {
    max-width: 100%;
    height: auto;
    vertical-align: middle;
}

h1, h2, h3, p {
    margin: 0;
}

h1, h2, h3 {
    line-height: 1.3;
    color: var(--color-primary-dark);
}

h2 {
    font-size: 2rem;
    margin-bottom: var(--space-xl);
    text-align: center;
    position: relative;
    padding-bottom: var(--space-sm);
}

h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background-color: var(--color-primary);
    border-radius: 2px;
}

/*
 * Utility Classes
 */
.container {
    max-width: var(--content-width);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--space-md);
    padding-right: var(--space-md);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: white;
    padding: var(--space-xs);
    z-index: 100;
    transition: top 0.3s;
}

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

/*
 * Header
 */
.site-header {
    background-color: var(--color-white);
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    padding: var(--space-xs) 0;
    position: sticky;
    top: 0;
    z-index: 10;
    height: var(--header-height);
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo-area {
    display: flex;
    flex-direction: column;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--color-primary-dark);
    text-decoration: none;
}
.accreditation-badge {
    font-size: 0.75rem;
    color: var(--color-text-light);
}


/*
 * Global Navigation
 */
.global-nav ul {
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
    gap: 1.8rem;
}

.global-nav a {
    text-decoration: none;
    color: var(--color-primary);
    font-weight: 500;
    position: relative;
    padding: var(--space-xs) 0;
}

.global-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--color-primary);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.global-nav a:hover::after,
.global-nav a:focus::after {
    transform: scaleX(1);
}

.nav-toggle {
    display: none;
}

/*
 * Hero Section
 */
.hero {
    background: url('assets/images/hero.jpg') no-repeat center center/cover;
    color: var(--color-white);
    text-align: center;
    padding: 6rem 0;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 63, 107, 0.6);
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 2.8rem;
    margin-bottom: var(--space-sm);
    color: var(--color-white);
}

.hero p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto;
}

/*
 * Content Sections
 */
.content-section {
    padding: var(--space-xxl) 0;
}

.alternate-bg {
    background-color: var(--color-secondary);
}

.section-intro {
    text-align: center;
    max-width: 700px;
    margin: calc(var(--space-xl) * -1 + var(--space-sm)) auto var(--space-xl);
    font-size: 1.1rem;
    color: var(--color-text-light);
}

/*
 * Features Section (#features)
 */
.media-object {
    display: flex;
    gap: var(--space-lg);
    align-items: center;
}
.media-object.image-right .media-text {
    order: -1;
}

.media-text { flex: 2; }
.media-image { flex: 1; }
.media-image img {
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

/*
 * Courses Section (#courses)
 */
.course-cards-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
}
.course-card {
    background-color: var(--color-white);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
}
.course-card h3 {
    margin-bottom: var(--space-xs);
    color: var(--color-primary);
}
.course-period {
    color: var(--color-text-light);
    margin-bottom: var(--space-md);
}
.fee-table table {
    width: 100%;
    border-collapse: collapse;
}
.fee-table th,
.fee-table td {
    padding: var(--space-xs) var(--space-sm);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}
.fee-table th {
    font-weight: normal;
}
.fee-table td {
    text-align: right;
    font-weight: 500;
}
.fee-table tfoot {
    font-weight: bold;
    color: var(--color-primary-dark);
}
.fee-table tfoot th, .fee-table tfoot td {
    border-bottom: none;
}

/*
 * Admission Flow Section (#flow)
 */
.flow-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    position: relative;
    max-width: 800px;
    margin: var(--space-lg) auto 0;
}
.flow-container::before {
    content: '';
    position: absolute;
    left: 24px;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--color-border);
}
.flow-step {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    position: relative;
}
.flow-step-number {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--color-primary);
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    flex-shrink: 0;
}
.flow-step-content {
    background: var(--color-white);
    padding: var(--space-md);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
    flex-grow: 1;
}
.flow-step-content h3 {
    margin-bottom: var(--space-xs);
}

/*
 * Recruitment Section (#recruitment)
 */
#recruitment .media-object {
    align-items: flex-start;
}
.recruitment-details dl {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--space-sm) var(--space-md);
}
.recruitment-details dt {
    font-weight: bold;
    color: var(--color-primary-dark);
}
.recruitment-details dd {
    margin-left: 0;
}
.recruitment-details ol, .recruitment-details ul {
    padding-left: 1.2rem;
    margin: var(--space-xs) 0;
}

/*
 * Access Section (#access)
 */
.access-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-lg);
    align-items: center;
}
.map-container iframe {
    width: 100%;
    height: 400px;
    border-radius: var(--border-radius);
}
.access-info ul {
    list-style: none;
    padding-left: 0;
}

/*
 * Contact Section (#contact)
 */
.contact-form-wrapper {
    max-width: 700px;
    margin: 0 auto;
    background-color: var(--color-white);
    padding: var(--space-xl);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}
.contact-form-wrapper p {
    margin-bottom: var(--space-md);
}
.form-group {
    margin-bottom: var(--space-md);
}
.form-group label {
    display: block;
    margin-bottom: var(--space-xs);
    font-weight: 500;
}
.form-group .required {
    color: var(--color-error);
    margin-left: 0.25rem;
}
.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-size: 1rem;
    font-family: inherit;
}
.form-group input:focus,
.form-group textarea:focus {
    outline: 2px solid var(--color-primary);
    border-color: var(--color-primary);
}
.button {
    display: inline-block;
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: 0.8rem 2rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    text-decoration: none;
    transition: background-color 0.3s;
}
.button:hover, .button:focus {
    background-color: var(--color-primary-dark);
}
#form-status {
    margin-top: var(--space-sm);
    font-weight: 500;
}
#form-status.success {
    color: var(--color-success);
}
#form-status.error {
    color: var(--color-error);
}

/*
 * Footer
 */
.site-footer {
    background-color: var(--color-primary-dark);
    color: rgba(255,255,255,0.8);
    padding: var(--space-xl) 0;
}
.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid rgba(255,255,255,0.2);
}
.footer-info h4 {
    color: var(--color-white);
    margin-bottom: var(--space-xs);
}
.footer-info p {
    margin-bottom: 0.25rem;
}
.footer-links ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xs) var(--space-lg);
}
.footer-links a {
    color: inherit;
    text-decoration: none;
}
.footer-links a:hover {
    text-decoration: underline;
}
.footer-bottom {
    text-align: center;
    font-size: 0.9rem;
}

/*
 * Responsive Design
 */
@media (max-width: 992px) {
    .access-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 60px;
    }
    h2 { font-size: 1.8rem; }
    .hero h1 { font-size: 2.2rem; }

    .nav-toggle {
        display: block;
        z-index: 1000;
        position: relative;
        background: none;
        border: none;
        cursor: pointer;
        padding: var(--space-xs);
    }
    
    .global-nav ul {
        position: fixed;
        top: 0;
        right: 0;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        flex-direction: column;
        background: var(--color-white);
        padding: 6rem 2rem 2rem;
        transform: translateX(100%);
        transition: transform 0.3s ease-in-out;
        gap: var(--space-sm);
        box-shadow: -4px 0 15px rgba(0,0,0,0.1);
    }
    
    .global-nav ul.is-active {
        transform: translateX(0);
    }
    
    .global-nav a {
        color: var(--color-primary-dark);
        font-size: 1.1rem;
    }
    
    .icon-bar {
        display: block;
        width: 25px;
        height: 3px;
        background-color: var(--color-primary);
        margin: 5px 0;
        transition: 0.3s;
    }
    
    .nav-toggle[aria-expanded="true"] .icon-bar:nth-child(1) {
        transform: rotate(-45deg) translate(-6px, 6px);
    }
    
    .nav-toggle[aria-expanded="true"] .icon-bar:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle[aria-expanded="true"] .icon-bar:nth-child(3) {
        transform: rotate(45deg) translate(-5px, -5px);
    }

    .media-object,
    .media-object.image-right {
        flex-direction: column;
    }

    .media-object.image-right .media-text {
        order: 0;
    }
    
    #recruitment .media-image { order: -1; }
    
    .map-container iframe {
        height: 300px;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--space-lg);
        text-align: center;
    }
    
    .footer-links ul {
        grid-template-columns: 1fr;
        gap: 0.8rem;
    }

    #recruitment.alternate-bg {
        background-color: var(--color-white);
    }

    #access.content-section {
        background-color: var(--color-secondary);
    }

    #contact.alternate-bg {
         background-color: var(--color-white);
    }
}
/* ===== Header ロゴ（装飾サムネ）最適化 ===== */
.logo-area {
  display: flex;              /* 既存がflexでも冪等 */
  align-items: center;
  gap: 12px;                  /* PC既定値（下で上書き） */
  min-height: 56px;           /* PCヘッダー高の目安 */
}

.brand-icon {
  width: 32px;                /* PC既定値 */
  height: 32px;
  object-fit: cover;          /* 看板写真の切り抜き */
  object-position: center;
  border-radius: 8px;         /* 写真に馴染む丸み */
  box-shadow: 0 1px 2px rgba(0,0,0,.12);
  flex: 0 0 auto;
}

/* Tablet（768–1023） */
@media (max-width: 1023.98px) {
  .logo-area { gap: 10px; min-height: 52px; }
  .brand-icon { width: 28px; height: 28px; border-radius: 6px; }
}

/* SP（≤767） */
@media (max-width: 767.98px) {
  .logo-area { gap: 8px; min-height: 48px; }
  .brand-icon { width: 24px; height: 24px; border-radius: 6px; }
}

/* キーボード操作の可視化（a11y） */
.logo-area a:focus-visible { outline: 3px solid rgba(0,90,156,.85); outline-offset: 3px; }