:root {
    /* Color Palette - Bright, Light, Authoritative Theme */
    --bg-color: #FAFAF8;
    /* Warm off-white */
    --bg-light-gray: #F3F1EC;
    /* Slightly darker gray for sections */
    --text-main: #2C3539;
    /* Deep charcoal for readability */
    --text-muted: #5E6C77;
    --accent-gold: #B89F6B;
    /* Soft metallic gold */
    --accent-navy: #1C2E4A;
    /* Deep navy for strong contrast accents */
    --surface-color: #FFFFFF;
    --surface-border: #E8E5DF;

    /* Typography */
    --font-serif: 'Noto Serif JP', serif;
    --font-sans: 'Zen Kaku Gothic New', sans-serif;

    /* Layout */
    --spacing-section: 7rem;
    --radius-sm: 8px;
    --radius-md: 16px;
    --shadow-sm: 0 4px 12px rgba(28, 46, 74, 0.04);
    --shadow-md: 0 10px 30px rgba(28, 46, 74, 0.08);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: var(--font-serif);
    line-height: 1.9;
    overflow-x: hidden;
    position: relative;
    letter-spacing: 0.05em;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

::selection {
    background: var(--accent-gold);
    color: #fff;
}

/* Helpers */
.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 2rem;
}

.text-center {
    text-align: center;
}

.mb-4 {
    margin-bottom: 2rem;
}

.align-left {
    text-align: left !important;
}

.bg-light-gray {
    background-color: var(--bg-light-gray);
}

/* Typography elements */
h1,
h2,
h3,
h4 {
    font-weight: 400;
    color: var(--accent-navy);
}

p {
    font-family: var(--font-sans);
    color: var(--text-muted);
    font-size: 1.05rem;
    margin-bottom: 1.6rem;
    text-align: justify;
}

strong {
    color: var(--text-main);
    font-weight: 500;
}

.note {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    color: var(--text-muted);
    opacity: 0.8;
    margin-top: 1rem;
}

/* Hero Section */
.hero {
    height: 85vh;
    /* Reduced from 100vh to naturally reduce top and bottom empty space */
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
    padding: 0 2rem;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 30%;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    /* Gradient overlay: dark at top to read white text if needed, fading to background color at bottom */
    background: linear-gradient(to bottom,
            rgba(250, 250, 248, 0.4) 0%,
            rgba(250, 250, 248, 0.8) 60%,
            rgba(250, 250, 248, 1) 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
    /* Removed margin-top to decrease top spacing */
}

.title {
    font-size: clamp(1.6rem, 3.5vw, 3rem);
    line-height: 1.4;
    color: var(--accent-navy);
    margin-bottom: 1rem;
    letter-spacing: 0.1em;
    white-space: nowrap;
}

.title-abbr {
    font-size: 0.65em;
    font-weight: 400;
    margin-left: 0.3em;
    color: var(--accent-gold);
}

.subtitle {
    font-family: var(--font-serif);
    color: var(--accent-gold);
    font-size: 1.8rem;
    letter-spacing: 0.25em;
    margin-bottom: 0;
    text-align: center;
    padding-left: 0.25em;
    /* Compensate for letter-spacing */
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--accent-gold);
    z-index: 1;
    text-decoration: none;
    cursor: pointer;
}

.scroll-indicator span {
    font-family: var(--font-sans);
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    margin-top: 15px;
    text-transform: uppercase;
    padding-left: 0.2em;
    /* Compensate for letter-spacing on the right */
}

.scroll-indicator .line {
    width: 1px;
    height: 60px;
    background: currentColor;
    animation: scrollLine 2.5s infinite cubic-bezier(0.65, 0, 0.35, 1);
}

@keyframes scrollLine {
    0% {
        transform: scaleY(0);
        transform-origin: top;
    }

    50% {
        transform: scaleY(1);
        transform-origin: top;
    }

    50.1% {
        transform: scaleY(1);
        transform-origin: bottom;
    }

    100% {
        transform: scaleY(0);
        transform-origin: bottom;
    }
}

/* Content Sections */
.section {
    padding: var(--spacing-section) 0;
    position: relative;
}

.section-badge {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    color: var(--accent-gold);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    text-align: center;
    margin-bottom: 1rem;
    font-weight: 500;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    color: var(--accent-navy);
    margin-bottom: 4rem;
    letter-spacing: 0.15em;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 30px;
    height: 1px;
    background-color: var(--accent-gold);
    margin: 1.5rem auto 0;
}

.section-title.align-left::after {
    margin-left: 0;
}

.text-block {
    max-width: 720px;
    margin: 0 auto;
}

.lead-text {
    font-size: 1.2rem;
    color: var(--accent-navy);
    font-family: var(--font-serif);
    line-height: 2;
    margin-bottom: 2.5rem;
}

/* Special Highlight Box */
.highlight-box {
    background-color: var(--surface-color);
    border-left: 4px solid var(--accent-gold);
    padding: 2rem;
    margin: 3rem 0;
    box-shadow: var(--shadow-sm);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.highlight-box p {
    margin-bottom: 1rem;
    color: var(--accent-navy);
}

.highlight-box p:last-child {
    margin-bottom: 0;
}

/* Flex Container for Image + Text (Philosophy & Org) */
.flex-container {
    display: flex;
    align-items: center;
    gap: 4rem;
}

@media (max-width: 800px) {
    .flex-container {
        flex-direction: column;
    }
}

.philosophy-image-wrapper {
    flex: 1;
}

.philosophy-image {
    width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-md);
}

.philosophy-text-wrapper {
    flex: 1;
}

.philosophy-catch {
    font-size: 1.8rem;
    font-family: var(--font-serif);
    color: var(--accent-navy);
    line-height: 1.6;
    margin-bottom: 2rem;
    letter-spacing: 0.05em;
}

/* Grids & Cards */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 2rem;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.card {
    background: var(--surface-color);
    padding: 2.5rem 2rem;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
    transition: transform 0.4s ease, box-shadow 0.4s ease;
    border: 1px solid var(--surface-border);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: rgba(184, 159, 107, 0.3);
    /* Soft gold border on hover */
}

/* Object Cards (目的) */
.object-card {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.card-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--bg-light-gray);
    color: var(--accent-gold);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-serif);
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
}

.object-card h4 {
    font-size: 1.1rem;
    line-height: 1.6;
    letter-spacing: 0.05em;
}

/* Activities List */
.activities-grid {
    gap: 3rem 2rem;
}

.activity-item {
    display: flex;
    gap: 1.5rem;
}

.bullet-point {
    width: 12px;
    height: 12px;
    background-color: var(--accent-gold);
    border-radius: 2px;
    transform: rotate(45deg);
    flex-shrink: 0;
    margin-top: 6px;
}

.activity-details h3 {
    font-size: 1.15rem;
    margin-bottom: 0.8rem;
    letter-spacing: 0.05em;
}

.activity-details p {
    font-size: 0.95rem;
    margin-bottom: 0;
}

/* Membership Grid */
.membership-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.membership-card {
    text-align: center;
}

.membership-icon {
    font-size: 2rem;
    color: var(--accent-gold);
    margin-bottom: 1rem;
}

.membership-card h3 {
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.membership-card p {
    margin-bottom: 0;
    font-size: 0.95rem;
}

/* Styled List for Vision */
.styled-list {
    list-style: none;
    margin: 0 auto 2.5rem;
    width: fit-content;
    text-align: left;
}

.styled-list li {
    display: flex;
    align-items: center;
    gap: 1.2rem;
    font-family: var(--font-sans);
    color: var(--text-main);
    font-size: 1.1rem;
    margin-bottom: 1.2rem;
    border-bottom: 1px dashed var(--surface-border);
    padding-bottom: 1rem;
}

.styled-list li:last-child {
    border-bottom: none;
}

.styled-list li::before {
    content: '';
    display: block;
    width: 20px;
    height: 1px;
    background-color: var(--accent-gold);
    flex-shrink: 0;
}

.vision-highlight {
    text-align: center;
    font-family: var(--font-serif);
    color: var(--accent-navy);
    font-size: 1.4rem;
    line-height: 1.8;
    padding: 3rem 0;
    border-top: 1px solid var(--surface-border);
    border-bottom: 1px solid var(--surface-border);
}

.sp-br {
    display: none;
}

/* Organization Definition List */
.org-container {
    align-items: flex-start;
}

.org-header {
    flex: 0 0 250px;
}

.org-body {
    flex: 1;
    background: var(--surface-color);
    padding: 3rem;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--surface-border);
}

.org-info {
    display: grid;
    grid-template-columns: 100px 1fr;
    gap: 1.5rem;
    font-family: var(--font-sans);
}

.org-info dt {
    color: var(--accent-gold);
    letter-spacing: 0.1em;
    font-family: var(--font-serif);
    border-bottom: 1px solid var(--surface-border);
    padding-bottom: 0.5rem;
}

.org-info dd {
    color: var(--text-main);
    border-bottom: 1px solid var(--surface-border);
    padding-bottom: 0.5rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1.2rem 3.5rem;
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: 50px;
    transition: all 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
    cursor: pointer;
    letter-spacing: 0.15em;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background-color: var(--accent-gold);
    color: var(--surface-color);
    border: 1px solid var(--accent-gold);
    box-shadow: 0 4px 20px rgba(184, 159, 107, 0.2);
}

.btn-primary:hover {
    background-color: transparent;
    color: var(--accent-gold);
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(184, 159, 107, 0.15);
}

/* Footer */
.footer {
    background-color: var(--accent-navy);
    color: var(--bg-color);
    padding: 5rem 0 3rem;
    text-align: center;
}

.footer-logo {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    color: var(--accent-gold);
    margin-bottom: 0.5rem;
    letter-spacing: 0.1em;
}

.footer-en {
    font-family: var(--font-serif);
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 1.5rem;
    letter-spacing: 0.05em;
}

.footer p {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.4);
    text-align: center;
    margin-bottom: 0;
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1s cubic-bezier(0.2, 0.8, 0.2, 1), transform 1s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Specific fix: preserve horizontal centering for scroll indicator during fade-in */
.scroll-indicator.fade-in {
    transform: translateX(-50%) translateY(30px);
}

.scroll-indicator.fade-in.visible {
    transform: translateX(-50%) translateY(0);
}

/* Media Queries */
@media (max-width: 768px) {
    :root {
        --spacing-section: 5rem;
    }

    .sp-br {
        display: block;
    }

    .org-header {
        flex: auto;
        width: 100%;
        margin-bottom: 2rem;
    }

    .org-body {
        padding: 2rem 1.5rem;
    }

    .org-info {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }

    .org-info dt,
    .org-info dd {
        border-bottom: none;
        padding-bottom: 0;
    }

    .org-info dt {
        margin-top: 1rem;
    }

    .org-info dt:first-child {
        margin-top: 0;
    }
}