/* ==========================================================================
   基本スタイル / Reset
   ========================================================================== */

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

:root {
    /* カラーパレット - 鹿児島の自然をイメージ */
    --color-primary: #2d5016; /* 深緑 - フキノトウの葉 */
    --color-secondary: #7da453; /* 若草色 */
    --color-accent: #f4a460; /* 桜島の夕焼け */
    --color-text: #1a1a1a;
    --color-text-light: #666666;
    --color-bg: #ffffff;
    --color-bg-gray: #f8f8f8;
    --color-border: #e0e0e0;
    
    /* タイポグラフィ */
    --font-main: 'Noto Sans JP', sans-serif;
    --font-serif: 'Noto Serif JP', serif;
    
    /* スペーシング */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --spacing-xxl: 8rem;
    
    /* ブレイクポイント */
    --breakpoint-sm: 640px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 1024px;
    --breakpoint-xl: 1280px;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-main);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
    opacity: 0.7;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ==========================================================================
   レイアウト / Container
   ========================================================================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

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

/* ==========================================================================
   ヘッダー / Header
   ========================================================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    transition: transform 0.3s ease;
}

.header.hidden {
    transform: translateY(-100%);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.logo-main {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: var(--color-primary);
}

.logo-sub {
    font-size: 0.75rem;
    color: var(--color-text-light);
    letter-spacing: 0.1em;
}

.nav {
    display: flex;
    gap: var(--spacing-md);
}

.nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    padding: var(--spacing-xs) var(--spacing-sm);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 80%;
}

/* メニュートグル（モバイル用） */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 30px;
    height: 30px;
    padding: 5px;
}

.menu-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-primary);
    transition: all 0.3s ease;
}

.menu-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ==========================================================================
   ヒーローセクション / Hero
   ========================================================================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: linear-gradient(135deg, #f8f8f8 0%, #e8f5e0 100%);
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(125, 164, 83, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(45, 80, 22, 0.08) 0%, transparent 50%);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: var(--spacing-lg) var(--spacing-md);
}

.hero-label {
    font-size: 0.875rem;
    letter-spacing: 0.2em;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
}

.hero-title {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.hero-title-main {
    font-size: clamp(3rem, 10vw, 6rem);
    font-weight: 900;
    letter-spacing: 0.05em;
    color: var(--color-primary);
    line-height: 1;
}

.hero-title-sub {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-weight: 400;
    letter-spacing: 0.15em;
    color: var(--color-text-light);
}

.hero-tagline {
    font-size: clamp(1rem, 2.5vw, 1.5rem);
    font-weight: 500;
    color: var(--color-primary);
    margin: var(--spacing-lg) 0;
    letter-spacing: 0.1em;
}

.hero-description {
    font-size: 1rem;
    color: var(--color-text-light);
    line-height: 2;
    margin-bottom: var(--spacing-xl);
}

.hero-scroll {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-text-light);
    font-size: 0.75rem;
    letter-spacing: 0.2em;
}

.hero-scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-primary), transparent);
    animation: scroll-line 2s ease-in-out infinite;
}

@keyframes scroll-line {
    0%, 100% {
        opacity: 0;
        transform: translateY(0);
    }
    50% {
        opacity: 1;
        transform: translateY(20px);
    }
}

/* ==========================================================================
   セクション共通スタイル
   ========================================================================== */

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-number {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--color-secondary);
    letter-spacing: 0.2em;
    margin-bottom: var(--spacing-sm);
}

.section-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 900;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.section-subtitle {
    font-size: 1rem;
    color: var(--color-text-light);
    letter-spacing: 0.1em;
}

/* ==========================================================================
   ABOUTセクション
   ========================================================================== */

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.about-concept-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text);
}

.highlight {
    color: var(--color-primary);
    position: relative;
    display: inline-block;
    padding: 0 0.2em;
}

.highlight::after {
    content: '';
    position: absolute;
    bottom: 0.2em;
    left: 0;
    right: 0;
    height: 0.4em;
    background-color: rgba(125, 164, 83, 0.3);
    z-index: -1;
}

.about-text {
    font-size: 1rem;
    line-height: 2;
    color: var(--color-text);
}

.about-text p {
    margin-bottom: var(--spacing-md);
}

.about-side {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.about-card {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    padding: var(--spacing-lg);
    border-radius: 8px;
}

.about-card-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.about-card-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.about-card-text {
    font-size: 0.875rem;
    line-height: 1.8;
    color: var(--color-text-light);
}

/* ==========================================================================
   BUSINESSセクション
   ========================================================================== */

.business-content {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.business-item {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    padding: var(--spacing-xl);
    border-radius: 8px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.business-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.business-item-header {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 2px solid var(--color-border);
}

.business-item-number {
    display: inline-block;
    font-size: 3rem;
    font-weight: 900;
    color: var(--color-secondary);
    opacity: 0.3;
    line-height: 1;
}

.business-item-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-primary);
    margin: var(--spacing-sm) 0;
}

.business-item-subtitle {
    font-size: 0.875rem;
    color: var(--color-text-light);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.business-item-description {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

.business-item-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.business-item-list li {
    font-size: 0.875rem;
    color: var(--color-text-light);
    padding-left: 1.5rem;
    position: relative;
}

.business-item-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-secondary);
    font-weight: 700;
}

/* ==========================================================================
   WORKSセクション
   ========================================================================== */

.works-content {
    margin-top: var(--spacing-xl);
}

.works-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.work-card {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    padding: var(--spacing-lg);
    border-radius: 8px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
}

.work-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.work-card-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-bg);
    background-color: var(--color-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.05em;
    width: fit-content;
}

.work-card-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.work-card-description {
    font-size: 0.875rem;
    color: var(--color-text-light);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
}

.work-card-date {
    font-size: 0.75rem;
    color: var(--color-text-light);
    letter-spacing: 0.05em;
}

/* COMING SOONカード */
.work-card-coming-soon {
    background-color: var(--color-bg-gray);
    border: 2px dashed var(--color-border);
    opacity: 0.8;
}

.work-card-coming-soon:hover {
    transform: none;
    box-shadow: none;
}

.work-card-coming-soon .work-card-title {
    color: var(--color-text-light);
    font-weight: 700;
    letter-spacing: 0.15em;
}

.work-card-coming-soon .work-card-description {
    font-style: italic;
}

.work-card-coming-soon .work-card-date {
    color: var(--color-secondary);
    font-weight: 700;
}

/* ==========================================================================
   MEMBERSセクション
   ========================================================================== */

.members-content {
    margin-top: var(--spacing-xl);
}

.members-intro {
    text-align: center;
    font-size: 1rem;
    line-height: 2;
    color: var(--color-text);
    margin-bottom: var(--spacing-xl);
}

.members-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.member-card {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    padding: var(--spacing-lg);
    border-radius: 8px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.member-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.member-card-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.member-card-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.member-card-description {
    font-size: 0.875rem;
    color: var(--color-text-light);
    line-height: 1.8;
}

.members-join {
    background-color: var(--color-bg);
    border: 2px solid var(--color-primary);
    padding: var(--spacing-xl);
    border-radius: 8px;
    text-align: center;
    margin-top: var(--spacing-xl);
}

.members-join-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.members-join-description {
    font-size: 1rem;
    line-height: 2;
    color: var(--color-text);
    margin-bottom: var(--spacing-lg);
}

.members-join-button {
    display: inline-block;
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-bg);
    background-color: var(--color-primary);
    padding: 1rem 3rem;
    border-radius: 50px;
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.members-join-button:hover {
    background-color: var(--color-secondary);
    transform: translateY(-2px);
    opacity: 1;
}

/* ==========================================================================
   CONTACTセクション
   ========================================================================== */

.contact-content {
    max-width: 800px;
    margin: 0 auto;
    margin-top: var(--spacing-xl);
}

.contact-intro {
    text-align: center;
    font-size: 1rem;
    line-height: 2;
    color: var(--color-text);
    margin-bottom: var(--spacing-xl);
}

.contact-form {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    padding: var(--spacing-xl);
    border-radius: 8px;
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.form-required {
    color: #d32f2f;
    font-size: 0.75rem;
    margin-left: 0.5rem;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 1rem;
    font-family: inherit;
    color: var(--color-text);
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    transition: border-color 0.3s ease;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

.form-textarea {
    resize: vertical;
    min-height: 150px;
}

.form-submit {
    text-align: center;
    margin-top: var(--spacing-lg);
}

.form-button {
    display: inline-block;
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-bg);
    background-color: var(--color-primary);
    padding: 1rem 3rem;
    border-radius: 50px;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.form-button:hover {
    background-color: var(--color-secondary);
    transform: translateY(-2px);
}

.contact-note {
    margin-top: var(--spacing-lg);
    font-size: 0.875rem;
    color: var(--color-text-light);
    line-height: 1.8;
    text-align: center;
}

/* ==========================================================================
   フッター / Footer
   ========================================================================== */

.footer {
    background-color: var(--color-primary);
    color: var(--color-bg);
    padding: var(--spacing-xl) 0 var(--spacing-lg);
}

.footer-content {
    text-align: center;
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.footer-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.footer-logo-main {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.footer-logo-sub {
    font-size: 0.875rem;
    opacity: 0.7;
    letter-spacing: 0.1em;
}

.footer-tagline {
    font-size: 0.875rem;
    opacity: 0.7;
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.1em;
}

.footer-social {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.footer-social-label {
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    opacity: 0.6;
    font-weight: 700;
}

.footer-social-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50px;
    transition: background-color 0.3s ease, transform 0.3s ease;
    font-size: 0.875rem;
    letter-spacing: 0.05em;
}

.footer-social-link:hover {
    background-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.footer-social-link svg {
    width: 20px;
    height: 20px;
}

.footer-nav {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.footer-link {
    font-size: 0.875rem;
    letter-spacing: 0.1em;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.footer-link:hover {
    opacity: 1;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
}

.footer-copyright {
    font-size: 0.75rem;
    opacity: 0.6;
    letter-spacing: 0.05em;
}

/* ==========================================================================
   レスポンシブデザイン
   ========================================================================== */

@media (max-width: 1024px) {
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .business-content {
        grid-template-columns: 1fr;
    }
    
    .works-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .members-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
        --spacing-xxl: 5rem;
    }
    
    .nav {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background-color: var(--color-bg);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: transform 0.3s ease, opacity 0.3s ease, visibility 0.3s ease;
    }
    
    .nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .works-grid {
        grid-template-columns: 1fr;
    }
    
    .members-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .hero-title-main {
        font-size: 2.5rem;
    }
    
    .hero-title-sub {
        font-size: 1.25rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .about-concept-title {
        font-size: 1.25rem;
    }
    
    .business-item-title {
        font-size: 1.5rem;
    }
    
    .members-join-title {
        font-size: 1.5rem;
    }
}