/* 
   ATHJ Official Website Styles
   Theme: Calm, Trustworthy, Simple, Mobile-First
*/

:root {
    /* Color Palette */
    --color-primary: #0f172a;
    /* Deep Navy - Trust */
    --color-secondary: #334155;
    /* Slate - Professional */
    --color-accent: #f59e0b;
    /* Muted Gold/Amber - Subtle Focus */
    --color-bg-body: #ffffff;
    --color-bg-light: #f8fafc;
    --color-bg-dark: #1e293b;
    --color-text-main: #1f2937;
    --color-text-light: #64748b;
    --color-white: #ffffff;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Typography */
    --font-heading: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
    --font-body: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
}

/* Reset & Base */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    line-height: 1.6;
    color: var(--color-text-main);
    background-color: var(--color-bg-body);
}

a {
    text-decoration: none;
    color: inherit;
    transition: opacity 0.3s;
}

a:hover {
    opacity: 0.8;
}

ul,
ol {
    list-style: none;
}

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

/* Layout Utilities */
.container {
    width: 90%;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

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

.text-white {
    color: var(--color-white);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: 4px;
    /* Rounded corners for friendly feel but still pro */
    font-weight: bold;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-white);
    border: 2px solid var(--color-primary);
}

.btn-primary:hover {
    background-color: var(--color-secondary);
    border-color: var(--color-secondary);
    transform: translateY(-2px);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

.btn-large {
    font-size: 1.1rem;
    padding: 1rem 3rem;
    margin-top: var(--spacing-md);
}

.btn-xl {
    font-size: 1.2rem;
    padding: 1.2rem 4rem;
    border-radius: 50px;
    /* Pill shape for main CTA */
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    color: var(--color-primary);
}

.btn-xl:hover {
    background-color: #d97706;
    border-color: #d97706;
}

/* Header */
.site-header {
    background-color: var(--color-white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: var(--spacing-sm) 0;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-primary);
    letter-spacing: 0.05em;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.site-nav a:not(.btn) {
    font-size: 0.95rem;
    color: var(--color-secondary);
    font-weight: 500;
}

/* Hero Section */
.hero-section {
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    background-color: var(--color-bg-light);
    text-align: center;
    border-bottom: 1px solid #e2e8f0;
}

.tagline {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1.3;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.hero-sub {
    font-size: 1.2rem;
    color: var(--color-text-light);
    letter-spacing: 0.1em;
}

/* General Sections */
.section {
    padding: var(--spacing-lg) 0;
}

.section-compact {
    padding: var(--spacing-md) 0;
}

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

.section-title {
    font-size: 1.8rem;
    color: var(--color-primary);
    text-align: center;
    margin-bottom: var(--spacing-md);
    position: relative;
    padding-bottom: 0.5rem;
}

.section-title::after {
    content: "";
    display: block;
    width: 60px;
    height: 3px;
    background-color: var(--color-accent);
    margin: 0.5rem auto 0;
}

/* MVV */
.mvv-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.mvv-item {
    background: var(--color-white);
    padding: var(--spacing-md);
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.02);
}

.mvv-item h3 {
    color: var(--color-secondary);
    margin-bottom: var(--spacing-sm);
    font-size: 1.3rem;
    border-bottom: 1px solid #f1f5f9;
    padding-bottom: 0.5rem;
}

.values-list {
    list-style: disc;
    padding-left: 1.2rem;
}

/* Audience */
.content-box {
    background: var(--color-white);
    border: 1px solid #e2e8f0;
    padding: var(--spacing-md);
    border-radius: 8px;
    text-align: center;
}

.note {
    margin-top: var(--spacing-sm);
    color: var(--color-text-light);
}

.small-note {
    font-size: 0.85rem;
    color: #94a3b8;
    margin-top: var(--spacing-xs);
}

/* Important Section (Definition) */
.section-emphasis {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.section-emphasis .section-title {
    color: var(--color-white);
}

.alert-box {
    background: rgba(255, 255, 255, 0.1);
    border-left: 4px solid var(--color-accent);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border-radius: 0 8px 8px 0;
}

.alert-title {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-accent);
}

/* Activities */
.activities-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.activities-list li {
    display: flex;
    gap: var(--spacing-sm);
    align-items: flex-start;
}

.activities-list .icon {
    font-size: 2rem;
    line-height: 1;
}

.activities-list h4 {
    color: var(--color-primary);
    margin-bottom: 0.3rem;
}

/* Organization */
.org-list {
    max-width: 600px;
    margin: 0 auto;
    border-top: 1px solid #cbd5e1;
}

.org-row {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid #cbd5e1;
}

.org-row dt {
    font-weight: bold;
    color: var(--color-primary);
}

.small-text {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-top: var(--spacing-sm);
}

/* Registration CTA */
.section-cta {
    text-align: center;
}

.cta-desc {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
}

.registration-steps {
    text-align: left;
    max-width: 600px;
    margin: 0 auto var(--spacing-md);
    background: var(--color-bg-light);
    padding: var(--spacing-md);
    border-radius: 8px;
}

.registration-steps ol {
    list-style: decimal;
    padding-left: 1.2rem;
}

.registration-steps li {
    margin-bottom: 0.5rem;
}

.cta-button-wrapper {
    margin-top: var(--spacing-md);
}

/* Legal */
.legal-content p {
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.5;
}

/* Footer */
.site-footer {
    background-color: var(--color-secondary);
    color: var(--color-white);
    padding: var(--spacing-md) 0;
    text-align: center;
}

.footer-logo {
    font-weight: bold;
    font-size: 1.2rem;
    margin-bottom: var(--spacing-sm);
}

.footer-contact a {
    color: var(--color-accent);
}

.copyright {
    margin-top: var(--spacing-md);
    font-size: 0.8rem;
    opacity: 0.7;
}

/* Media Queries (Mobile Optimization) */
@media (max-width: 768px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }

    .tagline {
        font-size: 2.2rem;
    }

    /* Mobile Header Layout */
    .header-inner {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: space-between;
    }

    .site-nav {
        gap: 0.5rem;
    }

    .site-nav a:not(.btn) {
        display: none;
        /* Hide nav links on mobile to simplify */
    }

    /* Ensure CTA is visible */
    .site-nav .btn {
        margin-left: auto;
    }

    .hero-content {
        padding: 0 var(--spacing-sm);
    }

    .mvv-grid {
        grid-template-columns: 1fr;
    }
}

/* ATHJ Model Block (New Section Styles) */
.at-model-block {
    text-align: left;
    max-width: 800px;
    margin: 0 auto var(--spacing-md); /* Add bottom margin to separate from button */
    padding: var(--spacing-md);
    background: var(--color-white);
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
}

.at-model-header {
    font-size: 1.5rem;
    color: var(--color-primary);
    text-align: center;
    margin-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--color-bg-light);
    padding-bottom: 0.5rem;
    display: block; /* Ensure it takes full width for border */
}

.at-sub-title {
    font-size: 1.1rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
    border-left: 4px solid var(--color-accent);
    padding-left: 0.8rem;
}

.at-def-box {
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-sm);
    background-color: var(--color-bg-light);
    border-radius: 4px;
}

.at-boundary-box {
    margin-top: var(--spacing-md);
}

.boundary-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.boundary-item {
    background: var(--color-white);
    padding: var(--spacing-sm);
    border: 1px solid #cbd5e1;
    border-left: 4px solid #94a3b8; /* Neutral/Gray border for boundaries */
    border-radius: 4px;
}

.boundary-item strong {
    display: block;
    color: var(--color-primary);
    margin-bottom: 0.2rem;
    font-size: 1rem;
}

.boundary-item p {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin: 0;
    line-height: 1.4;
}

.mb-4 {
    margin-bottom: 1rem;
}