/* ==========================================
   リセット & 基本設定
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* モダンカラーパレット */
    --primary-color: #00B894;
    --primary-dark: #00866B;
    --primary-light: #55EFC4;
    --secondary-color: #0984E3;
    --secondary-light: #74B9FF;
    --accent-color: #FF6B6B;
    --accent-light: #FF8787;
    --success-color: #00D563;
    --warning-color: #FDCB6E;
    
    /* ニュートラルカラー */
    --text-primary: #2D3436;
    --text-secondary: #636E72;
    --text-light: #B2BEC3;
    --text-white: #FFFFFF;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F8F9FA;
    --bg-tertiary: #F0F3F5;
    --bg-dark: #2D3436;
    --border-color: #DFE6E9;
    
    /* グラデーション */
    --gradient-primary: linear-gradient(135deg, #00B894 0%, #55EFC4 100%);
    --gradient-secondary: linear-gradient(135deg, #0984E3 0%, #74B9FF 100%);
    --gradient-accent: linear-gradient(135deg, #FF6B6B 0%, #FF8787 100%);
    --gradient-dark: linear-gradient(135deg, #2D3436 0%, #636E72 100%);
    --gradient-mesh: radial-gradient(at 40% 20%, hsla(169, 100%, 36%, 0.2) 0px, transparent 50%),
                      radial-gradient(at 80% 0%, hsla(211, 84%, 46%, 0.15) 0px, transparent 50%),
                      radial-gradient(at 0% 50%, hsla(355, 85%, 70%, 0.1) 0px, transparent 50%);
    
    /* タイポグラフィ */
    --font-primary: 'Inter', 'Noto Sans JP', sans-serif;
    --font-accent: 'Poppins', sans-serif;
    
    /* スペーシング */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 3rem;
    --spacing-xl: 5rem;
    --spacing-2xl: 8rem;
    
    /* ボーダーラジウス */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
    --radius-full: 9999px;
    
    /* トランジション */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* シャドウ（モダンな深み）*/
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-glow: 0 0 30px rgba(0, 184, 148, 0.3);
}

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

body {
    font-family: var(--font-primary);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-normal);
}

/* ==========================================
   ヘッダー & ナビゲーション
   ========================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    z-index: 1000;
    transition: var(--transition-normal);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
    background: rgba(255, 255, 255, 0.98);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 800;
}

.logo-main {
    display: block;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-family: var(--font-accent);
    font-size: 1.75rem;
    line-height: 1.2;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.logo-sub {
    display: block;
    font-size: 0.7rem;
    color: var(--text-secondary);
    font-weight: 500;
    letter-spacing: 0.05em;
    margin-top: 2px;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-list a {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    padding: var(--spacing-xs) 0;
    position: relative;
    transition: var(--transition-fast);
}

.nav-list a:hover {
    color: var(--primary-color);
}

.nav-list a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 100%;
    height: 2px;
    background: var(--gradient-primary);
    transition: transform var(--transition-normal);
}

.nav-list a:hover::after {
    transform: translateX(-50%) scaleX(1);
}

.btn-nav-donate {
    background: var(--gradient-primary);
    color: var(--text-white) !important;
    padding: 0.625rem 1.5rem;
    border-radius: var(--radius-full);
    font-weight: 700;
    box-shadow: var(--shadow-sm);
}

.btn-nav-donate::after {
    display: none;
}

.btn-nav-donate:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

.hamburger {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    gap: 5px;
}

.hamburger span {
    width: 26px;
    height: 2.5px;
    background: var(--primary-color);
    border-radius: var(--radius-full);
    transition: var(--transition-normal);
}

/* ==========================================
   ヒーローセクション - モダンデザイン
   ========================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 70px;
    overflow: hidden;
    background: linear-gradient(135deg, #0D1F2D 0%, #1A3A52 50%, #00B894 100%);
}

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

.hero-shapes {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.3;
    animation: float 20s ease-in-out infinite;
}

.shape-1 {
    width: 500px;
    height: 500px;
    background: var(--primary-light);
    top: -250px;
    right: -100px;
    animation-delay: 0s;
}

.shape-2 {
    width: 400px;
    height: 400px;
    background: var(--secondary-color);
    bottom: -200px;
    left: -100px;
    animation-delay: 5s;
}

.shape-3 {
    width: 300px;
    height: 300px;
    background: var(--accent-color);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 10s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0);
    }
    33% {
        transform: translate(30px, -30px);
    }
    66% {
        transform: translate(-30px, 30px);
    }
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 30% 50%, rgba(0, 184, 148, 0.1) 0%, transparent 50%);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--text-white);
    max-width: 900px;
    animation: fadeInUp 1s ease;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 0.625rem 1.5rem;
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    animation: fadeIn 1s ease 0.3s backwards;
}

.hero-badge i {
    color: var(--accent-color);
    animation: pulse 2s ease infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.hero-title {
    font-family: var(--font-accent);
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.title-line {
    display: block;
    animation: fadeInUp 0.8s ease backwards;
}

.title-line:nth-child(1) {
    animation-delay: 0.4s;
}

.title-line:nth-child(2) {
    animation-delay: 0.6s;
}

.title-highlight {
    display: block;
    background: linear-gradient(135deg, #55EFC4 0%, #74B9FF 50%, #FF8787 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.8s ease 0.8s backwards;
    margin-top: 0.5rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    font-weight: 400;
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
    opacity: 0.95;
    animation: fadeIn 1s ease 1s backwards;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 1s ease 1.2s backwards;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    animation: fadeIn 1s ease 1.4s backwards;
}

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

.stat-icon {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    opacity: 0.9;
}

.stat-number {
    font-family: var(--font-accent);
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.95rem;
    opacity: 0.9;
    font-weight: 500;
}

.hero-scroll {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: var(--text-white);
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(-10px); }
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.8), transparent);
    margin: var(--spacing-xs) auto 0;
}

/* ==========================================
   ボタンスタイル - モダン
   ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    border-radius: var(--radius-full);
    font-weight: 700;
    font-size: 1rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition-normal);
    border: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn span,
.btn i {
    position: relative;
    z-index: 1;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--text-white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.15);
    color: var(--text-white);
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-3px);
}

.btn-donate {
    background: var(--gradient-primary);
    color: var(--text-white);
    width: 100%;
    margin-top: var(--spacing-md);
    justify-content: center;
}

.btn-donate:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

/* ==========================================
   セクション共通スタイル
   ========================================== */
section {
    padding: var(--spacing-2xl) 0;
    position: relative;
}

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

.section-label {
    display: inline-block;
    font-family: var(--font-accent);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    position: relative;
    padding: 0.5rem 1.5rem;
}

.section-label::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--gradient-primary);
    transform: translateY(-50%);
    z-index: -1;
    opacity: 0.2;
}

.section-title {
    font-family: var(--font-accent);
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

/* ==========================================
   メッセージセクション
   ========================================== */
.message {
    background: var(--bg-secondary);
    position: relative;
}

.message::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-mesh);
    opacity: 0.5;
}

.message-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 1;
}

.message-text {
    font-size: 1.25rem;
    line-height: 2;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    font-weight: 500;
}

.message-text:first-child {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-dark);
}

/* ==========================================
   ビジョンセクション
   ========================================== */
.vision {
    background: var(--gradient-dark);
    color: var(--text-white);
    position: relative;
    overflow: hidden;
}

.vision::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: var(--primary-light);
    opacity: 0.1;
    filter: blur(100px);
}

.vision .section-label {
    color: var(--primary-light);
}

.vision .section-label::before {
    background: var(--primary-light);
}

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

.vision-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 1;
}

.vision-title {
    font-family: var(--font-accent);
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
    letter-spacing: -0.01em;
}

.vision-text {
    font-size: 1.15rem;
    line-height: 2;
    margin-bottom: var(--spacing-md);
    opacity: 0.95;
}

/* ==========================================
   ミッションセクション
   ========================================== */
.mission-content {
    max-width: 1000px;
    margin: 0 auto;
    text-align: center;
}

.mission-title {
    font-family: var(--font-accent);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--primary-dark);
    line-height: 1.6;
    letter-spacing: -0.01em;
}

.mission-text {
    font-size: 1.1rem;
    line-height: 1.9;
    margin-bottom: var(--spacing-xl);
    color: var(--text-secondary);
}

.mission-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.mission-card {
    background: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    border: 2px solid var(--border-color);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.mission-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition-normal);
}

.mission-card:hover::before {
    transform: scaleX(1);
}

.mission-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.mission-icon {
    width: 90px;
    height: 90px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    box-shadow: var(--shadow-md);
}

.mission-icon i {
    font-size: 2.5rem;
    color: var(--text-white);
}

.mission-card h4 {
    font-family: var(--font-accent);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
}

.mission-card p {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

/* ==========================================
   支援内容セクション
   ========================================== */
.support {
    background: var(--bg-secondary);
    position: relative;
}

.support::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-mesh);
    opacity: 0.3;
}

.support-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    position: relative;
    z-index: 1;
}

.support-card {
    background: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    border: 1px solid var(--border-color);
}

.support-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.support-image {
    width: 100px;
    height: 100px;
    background: var(--gradient-secondary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    box-shadow: var(--shadow-md);
}

.support-image i {
    font-size: 3rem;
    color: var(--text-white);
}

.support-card h3 {
    font-family: var(--font-accent);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-dark);
    text-align: center;
}

.support-card > p {
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

.support-list {
    list-style: none;
    padding-left: 0;
}

.support-list li {
    font-size: 0.95rem;
    padding: var(--spacing-xs) 0;
    padding-left: 1.75rem;
    position: relative;
    color: var(--text-primary);
    line-height: 1.7;
}

.support-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.support-list li::after {
    content: '✓';
    position: absolute;
    left: 5px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-white);
    font-size: 0.75rem;
    font-weight: 700;
}

/* ==========================================
   アプローチセクション
   ========================================== */
.approach-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.approach-item {
    position: relative;
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    border: 2px solid var(--border-color);
    transition: var(--transition-normal);
    overflow: hidden;
}

.approach-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition-normal);
}

.approach-item:hover::before {
    opacity: 0.05;
}

.approach-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.approach-number {
    font-family: var(--font-accent);
    font-size: 5rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.3;
    position: absolute;
    top: 20px;
    right: 20px;
    line-height: 1;
}

.approach-title {
    font-family: var(--font-accent);
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--primary-dark);
    position: relative;
    z-index: 1;
}

.approach-text {
    font-size: 1.05rem;
    line-height: 1.9;
    color: var(--text-secondary);
    position: relative;
    z-index: 1;
}

/* ==========================================
   インパクトセクション
   ========================================== */
.impact {
    background: var(--gradient-primary);
    color: var(--text-white);
    position: relative;
    overflow: hidden;
}

.impact::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -10%;
    width: 800px;
    height: 800px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    filter: blur(100px);
}

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

.impact .section-label::before {
    background: var(--text-white);
}

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

.impact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    position: relative;
    z-index: 1;
}

.impact-card {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 2px solid rgba(255, 255, 255, 0.2);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    text-align: center;
    transition: var(--transition-normal);
}

.impact-card:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-10px) scale(1.02);
    border-color: rgba(255, 255, 255, 0.4);
    box-shadow: var(--shadow-xl);
}

.impact-number {
    font-family: var(--font-accent);
    font-size: 4rem;
    font-weight: 900;
    margin-bottom: var(--spacing-sm);
    line-height: 1;
}

.impact-label {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    font-family: var(--font-accent);
}

.impact-card p {
    font-size: 0.95rem;
    opacity: 0.9;
}

/* ==========================================
   寄付セクション
   ========================================== */
.donate {
    background: var(--bg-secondary);
    position: relative;
}

.donate::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-mesh);
    opacity: 0.4;
}

.donate-intro {
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
    text-align: center;
    position: relative;
    z-index: 1;
}

.donate-intro p {
    font-size: 1.15rem;
    line-height: 2;
    color: var(--text-secondary);
}

.donate-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    position: relative;
    z-index: 1;
}

.donate-card {
    background: var(--bg-primary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 2px solid var(--border-color);
    transition: var(--transition-normal);
}

.donate-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.donate-icon {
    width: 90px;
    height: 90px;
    background: var(--gradient-accent);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    box-shadow: var(--shadow-md);
}

.donate-icon i {
    font-size: 2.5rem;
    color: var(--text-white);
}

.donate-card h3 {
    font-family: var(--font-accent);
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-dark);
    text-align: center;
}

.donate-card > p {
    text-align: center;
    font-size: 1.05rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

.donate-amounts {
    margin: var(--spacing-md) 0;
}

.amount-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    transition: var(--transition-normal);
}

.amount-item:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-light);
    transform: translateX(5px);
}

.amount {
    font-family: var(--font-accent);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.impact {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.donate-legacy {
    margin-top: var(--spacing-xl);
    background: var(--gradient-dark);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    position: relative;
    z-index: 1;
}

.legacy-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    color: var(--text-white);
}

.legacy-icon {
    flex-shrink: 0;
    width: 120px;
    height: 120px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.legacy-icon i {
    font-size: 4rem;
    color: var(--text-white);
}

.legacy-text h3 {
    font-family: var(--font-accent);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.legacy-text p {
    font-size: 1.05rem;
    line-height: 1.9;
    margin-bottom: var(--spacing-md);
    opacity: 0.95;
}

.donate-tax {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-xl);
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    border: 2px solid var(--primary-light);
    box-shadow: var(--shadow-sm);
    position: relative;
    z-index: 1;
}

.donate-tax h3 {
    font-family: var(--font-accent);
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-dark);
    text-align: center;
}

.donate-tax p {
    font-size: 1rem;
    line-height: 1.9;
    color: var(--text-secondary);
    text-align: center;
}

/* ==========================================
   団体概要セクション
   ========================================== */
.about-content {
    max-width: 1000px;
    margin: 0 auto;
}

.about-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    background: var(--bg-primary);
    box-shadow: var(--shadow-md);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 2px solid var(--border-color);
}

.about-table tr {
    border-bottom: 1px solid var(--border-color);
}

.about-table tr:last-child {
    border-bottom: none;
}

.about-table th,
.about-table td {
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: left;
}

.about-table th {
    background: var(--bg-secondary);
    font-family: var(--font-accent);
    font-weight: 700;
    color: var(--primary-dark);
    width: 200px;
    vertical-align: top;
}

.about-table td {
    font-size: 1rem;
    line-height: 1.9;
    color: var(--text-primary);
}

/* ==========================================
   お問い合わせセクション
   ========================================== */
.contact {
    background: var(--bg-secondary);
    position: relative;
}

.contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-mesh);
    opacity: 0.3;
}

.contact-intro {
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
    text-align: center;
    position: relative;
    z-index: 1;
}

.contact-intro p {
    font-size: 1.1rem;
    line-height: 1.9;
    color: var(--text-secondary);
}

/* お問い合わせフォーム */
.contact-form-wrapper {
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
    position: relative;
    z-index: 1;
}

.contact-form {
    background: var(--bg-primary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 2px solid var(--border-color);
}

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

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    font-size: 0.95rem;
}

.required {
    color: var(--accent-color);
    font-weight: 700;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.875rem 1.25rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: var(--font-primary);
    color: var(--text-primary);
    background: var(--bg-primary);
    transition: var(--transition-normal);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 184, 148, 0.1);
}

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

.form-privacy {
    margin: var(--spacing-md) 0;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    cursor: pointer;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    cursor: pointer;
    width: 18px;
    height: 18px;
}

.btn-submit {
    width: 100%;
    justify-content: center;
    font-size: 1.1rem;
    padding: 1.125rem 2rem;
}

.btn-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.form-message {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    font-weight: 600;
    text-align: center;
    display: none;
}

.form-message.success {
    display: block;
    background: rgba(0, 213, 99, 0.1);
    color: var(--success-color);
    border: 2px solid var(--success-color);
}

.form-message.error {
    display: block;
    background: rgba(255, 107, 107, 0.1);
    color: var(--accent-color);
    border: 2px solid var(--accent-color);
}

/* 直接メール送信オプション */
.direct-email-info {
    margin-top: var(--spacing-lg);
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 2px solid var(--border-color);
}

.or-text {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
}

.btn-email-direct {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    background: var(--gradient-secondary);
    color: var(--text-white);
    border-radius: var(--radius-full);
    font-weight: 700;
    text-decoration: none;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-md);
}

.btn-email-direct:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.email-address {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-top: var(--spacing-md);
}

.email-address i {
    color: var(--primary-color);
    margin-right: 0.5rem;
}

.email-address a {
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: none;
}

.email-address a:hover {
    text-decoration: underline;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    max-width: 1100px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.contact-item {
    background: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    display: flex;
    gap: var(--spacing-md);
    transition: var(--transition-normal);
    border: 2px solid var(--border-color);
}

.contact-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.contact-icon {
    flex-shrink: 0;
    width: 70px;
    height: 70px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
}

.contact-icon i {
    font-size: 1.75rem;
    color: var(--text-white);
}

.contact-text h4 {
    font-family: var(--font-accent);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--primary-dark);
}

.contact-text p {
    font-size: 0.95rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

/* ==========================================
   フッター
   ========================================== */
.footer {
    background: var(--bg-dark);
    color: var(--text-white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-logo h3 {
    font-family: var(--font-accent);
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: var(--spacing-xs);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-tagline {
    font-size: 0.95rem;
    opacity: 0.8;
}

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

.footer-column h4 {
    font-family: var(--font-accent);
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.footer-column ul {
    list-style: none;
}

.footer-column ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-column ul li a {
    font-size: 0.95rem;
    opacity: 0.8;
    transition: var(--transition-fast);
}

.footer-column ul li a:hover {
    opacity: 1;
    padding-left: 8px;
    color: var(--primary-light);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
    opacity: 0.7;
}

/* ==========================================
   スクロールトップボタン
   ========================================== */
.scroll-top {
    position: fixed;
    bottom: var(--spacing-md);
    right: var(--spacing-md);
    width: 56px;
    height: 56px;
    background: var(--gradient-primary);
    color: var(--text-white);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-lg);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.scroll-top i {
    font-size: 1.5rem;
}

/* ==========================================
   レスポンシブデザイン
   ========================================== */
@media (max-width: 768px) {
    :root {
        --spacing-lg: 2rem;
        --spacing-xl: 3rem;
        --spacing-2xl: 5rem;
    }
    
    .nav {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        transition: var(--transition-normal);
        box-shadow: var(--shadow-xl);
    }
    
    .nav.active {
        left: 0;
    }
    
    .nav-list {
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: var(--spacing-sm);
        align-items: stretch;
    }
    
    .nav-list a {
        font-size: 1.15rem;
        padding: var(--spacing-sm) 0;
        display: block;
        text-align: center;
    }
    
    .btn-nav-donate {
        margin-top: var(--spacing-sm);
        text-align: center;
        display: block;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .hero-buttons .btn {
        width: 100%;
        justify-content: center;
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .section-title {
        font-size: 2.25rem;
    }
    
    .mission-grid,
    .support-grid,
    .approach-grid,
    .impact-grid,
    .contact-info {
        grid-template-columns: 1fr;
    }
    
    .donate-grid {
        grid-template-columns: 1fr;
    }
    
    .legacy-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .about-table th,
    .about-table td {
        display: block;
        width: 100%;
    }
    
    .about-table th {
        padding-bottom: var(--spacing-xs);
    }
    
    .about-table td {
        padding-top: 0;
    }
    
    .contact-item {
        flex-direction: column;
        text-align: center;
    }
    
    .contact-form {
        padding: var(--spacing-md);
    }
    
    .contact-form-wrapper {
        margin-bottom: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero {
        min-height: 85vh;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
}

/* ==========================================
   アニメーション
   ========================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInFromLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInFromRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* スクロールアニメーション用のクラス */
.fade-in {
    animation: fadeIn 1s ease;
}

.slide-in-left {
    animation: slideInFromLeft 0.8s ease;
}

.slide-in-right {
    animation: slideInFromRight 0.8s ease;
}