/*
 * LINKWEB Showcase - Soccer Club Template v2
 * スポーツ感強化版
 * 
 * 改善点:
 * - 斜めライン・クリップパス
 * - 太いフォント・コントラスト強化
 * - 余白タイト化
 * - アニメーション強化
 */

/* ========================================
   CSS Variables (Design Tokens)
   ======================================== */
:root {
    /* Colors - Primary (Deep Green) */
    --color-primary: #0d3320;
    --color-primary-dark: #071a10;
    --color-primary-light: #1a5c3a;
    
    /* Colors - Accent (Gold) */
    --color-accent: #d4a422;
    --color-accent-dark: #b8901d;
    --color-accent-light: #f0c14b;
    
    /* Colors - Neutrals */
    --color-white: #ffffff;
    --color-gray-50: #f8fafc;
    --color-gray-100: #f1f5f9;
    --color-gray-200: #e2e8f0;
    --color-gray-300: #cbd5e1;
    --color-gray-400: #94a3b8;
    --color-gray-500: #64748b;
    --color-gray-600: #475569;
    --color-gray-700: #334155;
    --color-gray-800: #1e293b;
    --color-gray-900: #0f172a;
    --color-black: #000000;
    
    /* Typography */
    --font-en: 'Outfit', sans-serif;
    --font-jp: 'Noto Sans JP', sans-serif;
    
    /* Font Sizes (1.25 ratio) */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 4rem;
    --text-7xl: 5rem;
    
    /* Spacing (8px grid) - タイト化 */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    
    /* Border Radius */
    --radius-sm: 2px;
    --radius-md: 4px;
    --radius-lg: 8px;
    --radius-xl: 12px;
    --radius-2xl: 16px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.15), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-hard: 4px 4px 0 0 var(--color-primary);
    
    /* Transitions */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Layout */
    --container-max: 1200px;
    --header-height: 72px;
    
    /* Skew angle for sports feel */
    --skew-angle: -3deg;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-jp);
    font-size: var(--text-base);
    line-height: 1.7;
    color: var(--color-gray-800);
    background-color: var(--color-white);
    overflow-x: hidden;
}

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

a {
    color: inherit;
    text-decoration: none;
}

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

ul, ol {
    list-style: none;
}

/* ========================================
   Typography - スポーツ感強化
   ======================================== */
.text-en {
    font-family: var(--font-en);
    letter-spacing: 0.02em;
}

.section-label {
    font-family: var(--font-en);
    font-size: var(--text-xs);
    font-weight: 800;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--space-2);
    display: inline-block;
    position: relative;
}

.section-label::before {
    content: '';
    position: absolute;
    left: -20px;
    top: 50%;
    width: 12px;
    height: 2px;
    background-color: var(--color-accent);
    transform: translateY(-50%);
}

.section-title {
    font-family: var(--font-en);
    font-size: var(--text-5xl);
    font-weight: 900;
    letter-spacing: -0.02em;
    color: var(--color-gray-900);
    margin-bottom: var(--space-4);
    line-height: 1.1;
    text-transform: uppercase;
}

.section-subtitle {
    font-size: var(--text-base);
    color: var(--color-gray-600);
    max-width: 560px;
}

@media (max-width: 768px) {
    .section-title {
        font-size: var(--text-3xl);
    }
}

/* ========================================
   Layout
   ======================================== */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-5);
}

.section {
    padding: var(--space-20) 0;
    position: relative;
}

.section--gray {
    background-color: var(--color-gray-50);
}

.section--dark {
    background-color: var(--color-primary);
    color: var(--color-white);
}

/* 斜めライン装飾 */
.section--skew {
    position: relative;
}

.section--skew::before {
    content: '';
    position: absolute;
    top: -40px;
    left: 0;
    right: 0;
    height: 80px;
    background-color: inherit;
    transform: skewY(var(--skew-angle));
    z-index: 1;
}

/* ========================================
   Buttons - スポーツ感強化
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-8);
    font-family: var(--font-en);
    font-size: var(--text-sm);
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left var(--transition-base);
}

.btn:hover::before {
    left: 100%;
}

.btn--primary {
    background-color: var(--color-accent);
    color: var(--color-black);
    box-shadow: 0 4px 0 0 var(--color-accent-dark);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 0 0 var(--color-accent-dark);
}

.btn--primary:active {
    transform: translateY(2px);
    box-shadow: 0 2px 0 0 var(--color-accent-dark);
}

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

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

.btn--dark {
    background-color: var(--color-primary);
    color: var(--color-white);
    box-shadow: 0 4px 0 0 var(--color-primary-dark);
}

.btn--dark:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 0 0 var(--color-primary-dark);
}

/* ========================================
   Header
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: var(--color-primary);
    z-index: 1000;
    transition: all var(--transition-base);
}

.header--scrolled {
    box-shadow: var(--shadow-lg);
    background-color: rgba(13, 51, 32, 0.98);
}

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

.header__logo {
    font-family: var(--font-en);
    font-size: var(--text-lg);
    font-weight: 800;
    color: var(--color-white);
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.header__logo span {
    color: var(--color-accent);
}

.header__nav {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.header__nav-list {
    display: flex;
    gap: var(--space-6);
}

.header__nav-link {
    font-family: var(--font-en);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-white);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: color var(--transition-fast);
    position: relative;
}

.header__nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: width var(--transition-base);
}

.header__nav-link:hover {
    color: var(--color-accent);
}

.header__nav-link:hover::after {
    width: 100%;
}

.header__cta {
    padding: var(--space-3) var(--space-5);
    font-size: var(--text-xs);
}

/* Mobile Menu Button */
.header__menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-2);
}

.header__menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-white);
    transition: all var(--transition-base);
}

body.menu-open {
    overflow: hidden;
}

@media (max-width: 768px) {
    .header__nav-list {
        display: none;
    }

    .header__nav-list.is-open {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        display: flex;
        flex-direction: column;
        gap: var(--space-4);
        padding: var(--space-6) var(--space-5);
        background-color: var(--color-primary);
        border-top: 1px solid rgba(255, 255, 255, 0.2);
        box-shadow: var(--shadow-lg);
        z-index: 999;
    }
    
    .header__cta {
        display: none;
    }
    
    .header__menu-btn {
        display: flex;
    }

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

    .header__menu-btn.is-active span:nth-child(2) {
        opacity: 0;
    }

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

/* ========================================
   Hero - スポーツ感強化
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    background-color: var(--color-primary-dark);
}

.hero__bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero__bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.4;
}

/* 斜めオーバーレイ */
.hero__overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        135deg,
        rgba(13, 51, 32, 0.95) 0%,
        rgba(13, 51, 32, 0.8) 40%,
        rgba(13, 51, 32, 0.6) 100%
    );
    z-index: 2;
}

/* 斜めライン装飾 */
.hero__stripe {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background-color: var(--color-accent);
    clip-path: polygon(100% 0, 100% 100%, 0 100%, 40% 0);
    opacity: 0.1;
    z-index: 2;
}

.hero__content {
    position: relative;
    z-index: 10;
    color: var(--color-white);
    max-width: 800px;
    padding-top: var(--header-height);
}

.hero__subtitle {
    font-family: var(--font-en);
    font-size: var(--text-sm);
    font-weight: 700;
    letter-spacing: 0.3em;
    margin-bottom: var(--space-4);
    color: var(--color-accent);
    text-transform: uppercase;
}

.hero__title {
    font-family: var(--font-en);
    font-size: var(--text-7xl);
    font-weight: 900;
    line-height: 0.95;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-6);
    text-transform: uppercase;
}

.hero__title-line {
    display: block;
    overflow: hidden;
}

.hero__title-text {
    display: block;
}

.hero__title-accent {
    color: var(--color-accent);
    position: relative;
}

.hero__title-accent::after {
    content: '';
    position: absolute;
    bottom: 0.1em;
    left: 0;
    width: 100%;
    height: 0.15em;
    background-color: var(--color-accent);
    opacity: 0.3;
}

.hero__description {
    font-size: var(--text-lg);
    line-height: 1.8;
    margin-bottom: var(--space-8);
    opacity: 0.9;
    max-width: 480px;
}

.hero__buttons {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
}

/* Hero Stats */
.hero__stats {
    display: flex;
    gap: var(--space-10);
    margin-top: var(--space-12);
    padding-top: var(--space-8);
    border-top: 1px solid rgba(255,255,255,0.2);
}

.hero__stat {
    text-align: left;
}

.hero__stat-number {
    font-family: var(--font-en);
    font-size: var(--text-4xl);
    font-weight: 900;
    color: var(--color-accent);
    line-height: 1;
}

.hero__stat-label {
    font-size: var(--text-sm);
    color: rgba(255,255,255,0.7);
    margin-top: var(--space-1);
}

@media (max-width: 768px) {
    .hero {
        min-height: 100vh;
    }
    
    .hero__title {
        font-size: var(--text-5xl);
    }
    
    .hero__description {
        font-size: var(--text-base);
    }
    
    .hero__stats {
        gap: var(--space-6);
    }
    
    .hero__stat-number {
        font-size: var(--text-2xl);
    }
}

/* ========================================
   News Section
   ======================================== */
.news {
    padding: var(--space-20) 0;
    background-color: var(--color-white);
}

.news__header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    margin-bottom: var(--space-10);
}

.news__more {
    font-family: var(--font-en);
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    gap: var(--space-2);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: all var(--transition-fast);
}

.news__more:hover {
    color: var(--color-accent);
    gap: var(--space-3);
}

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

.news__item {
    display: flex;
    align-items: center;
    gap: var(--space-5);
    padding: var(--space-5) var(--space-6);
    background-color: var(--color-white);
    transition: all var(--transition-fast);
    border-left: 3px solid transparent;
    border-bottom: 1px solid var(--color-gray-100);
}

.news__item:hover {
    background-color: var(--color-gray-50);
    border-left-color: var(--color-accent);
    transform: translateX(8px);
}

.news__date {
    font-family: var(--font-en);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-gray-500);
    min-width: 90px;
}

.news__category {
    font-family: var(--font-en);
    font-size: var(--text-xs);
    font-weight: 700;
    padding: var(--space-1) var(--space-3);
    background-color: var(--color-primary);
    color: var(--color-white);
    min-width: 80px;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.news__category--result {
    background-color: var(--color-accent);
    color: var(--color-black);
}

.news__title {
    flex: 1;
    font-size: var(--text-base);
    font-weight: 500;
    color: var(--color-gray-800);
}

@media (max-width: 768px) {
    .news__header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-4);
    }
    
    .news__item {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-2);
        padding: var(--space-4);
    }
    
    .news__date {
        min-width: auto;
    }
}

/* ========================================
   About Section
   ======================================== */
.about {
    padding: var(--space-20) 0;
    background-color: var(--color-gray-50);
    position: relative;
    overflow: hidden;
}

/* 背景の斜めライン */
.about::before {
    content: '';
    position: absolute;
    top: 0;
    right: -10%;
    width: 40%;
    height: 100%;
    background-color: var(--color-primary);
    opacity: 0.03;
    transform: skewX(-10deg);
}

.about__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
    align-items: center;
}

.about__image {
    position: relative;
}

.about__image img {
    width: 100%;
    height: auto;
    aspect-ratio: 4/3;
    object-fit: cover;
}

/* 画像の装飾 - 斜めクリップ */
.about__image::before {
    content: '';
    position: absolute;
    top: -8px;
    left: -8px;
    right: 8px;
    bottom: 8px;
    border: 3px solid var(--color-accent);
    z-index: -1;
}

.about__image::after {
    content: '';
    position: absolute;
    bottom: -20px;
    right: -20px;
    width: 100px;
    height: 100px;
    background-color: var(--color-accent);
    clip-path: polygon(100% 0, 100% 100%, 0 100%);
}

.about__content {
    padding: var(--space-4) 0;
}

.about__text {
    font-size: var(--text-base);
    line-height: 2;
    color: var(--color-gray-700);
    margin-bottom: var(--space-8);
}

.about__features {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    margin-bottom: var(--space-8);
}

.about__feature {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4);
    background-color: var(--color-white);
    border-left: 3px solid var(--color-accent);
    transition: all var(--transition-fast);
}

.about__feature:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-md);
}

.about__feature-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-primary);
    color: var(--color-accent);
    font-family: var(--font-en);
    font-weight: 900;
    font-size: var(--text-lg);
}

.about__feature-text {
    font-weight: 600;
    color: var(--color-gray-800);
    font-size: var(--text-sm);
}

@media (max-width: 768px) {
    .about__inner {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }
    
    .about__image::before,
    .about__image::after {
        display: none;
    }
}

/* ========================================
   School Section
   ======================================== */
.school {
    padding: var(--space-20) 0;
    background-color: var(--color-white);
}

.school__header {
    text-align: center;
    margin-bottom: var(--space-12);
}

.school__header .section-label::before {
    display: none;
}

.school__header .section-subtitle {
    margin: 0 auto;
}

.school__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.school__card {
    background-color: var(--color-white);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    position: relative;
}

.school__card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background-color: var(--color-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

.school__card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.school__card:hover::before {
    transform: scaleX(1);
}

.school__card-image {
    aspect-ratio: 16/10;
    overflow: hidden;
}

.school__card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.school__card:hover .school__card-image img {
    transform: scale(1.08);
}

.school__card-content {
    padding: var(--space-5);
}

.school__card-label {
    font-family: var(--font-en);
    font-size: var(--text-xs);
    font-weight: 800;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    text-transform: uppercase;
    margin-bottom: var(--space-1);
}

.school__card-title {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--space-2);
}

.school__card-text {
    font-size: var(--text-sm);
    color: var(--color-gray-600);
    line-height: 1.6;
    margin-bottom: var(--space-4);
}

.school__card-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-gray-200);
}

.school__card-info-item {
    display: flex;
    justify-content: space-between;
    font-size: var(--text-sm);
}

.school__card-info-label {
    color: var(--color-gray-500);
}

.school__card-info-value {
    font-weight: 700;
    color: var(--color-gray-800);
}

@media (max-width: 1024px) {
    .school__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .school__grid {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   Staff Section
   ======================================== */
.staff {
    padding: var(--space-20) 0;
    background-color: var(--color-primary);
    color: var(--color-white);
    position: relative;
    overflow: hidden;
}

/* 背景パターン */
.staff::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(45deg, rgba(255,255,255,0.02) 25%, transparent 25%),
        linear-gradient(-45deg, rgba(255,255,255,0.02) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, rgba(255,255,255,0.02) 75%),
        linear-gradient(-45deg, transparent 75%, rgba(255,255,255,0.02) 75%);
    background-size: 40px 40px;
}

.staff__header {
    text-align: center;
    margin-bottom: var(--space-12);
    position: relative;
    z-index: 1;
}

.staff__header .section-label {
    color: var(--color-accent);
}

.staff__header .section-label::before {
    display: none;
}

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

.staff__header .section-subtitle {
    margin: 0 auto;
    color: rgba(255,255,255,0.7);
}

.staff__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
    position: relative;
    z-index: 1;
}

.staff__card {
    text-align: center;
    padding: var(--space-6);
    background-color: rgba(255,255,255,0.05);
    transition: all var(--transition-base);
}

.staff__card:hover {
    background-color: rgba(255,255,255,0.1);
    transform: translateY(-8px);
}

.staff__card-image {
    width: 140px;
    height: 140px;
    margin: 0 auto var(--space-4);
    overflow: hidden;
    border: 3px solid var(--color-accent);
    position: relative;
}

.staff__card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(30%);
    transition: all var(--transition-base);
}

.staff__card:hover .staff__card-image img {
    filter: grayscale(0%);
    transform: scale(1.05);
}

.staff__card-role {
    font-family: var(--font-en);
    font-size: var(--text-xs);
    font-weight: 800;
    letter-spacing: 0.15em;
    color: var(--color-accent);
    text-transform: uppercase;
    margin-bottom: var(--space-1);
}

.staff__card-name {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: var(--space-1);
}

.staff__card-name-en {
    font-family: var(--font-en);
    font-size: var(--text-sm);
    color: rgba(255,255,255,0.5);
}

@media (max-width: 1024px) {
    .staff__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .staff__grid {
        gap: var(--space-4);
    }
    
    .staff__card-image {
        width: 120px;
        height: 120px;
    }
}

/* ========================================
   Sponsors Section - 新規追加
   ======================================== */
.sponsors {
    padding: var(--space-16) 0;
    background-color: var(--color-gray-50);
}

.sponsors__header {
    text-align: center;
    margin-bottom: var(--space-10);
}

.sponsors__header .section-label::before {
    display: none;
}

.sponsors__grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: var(--space-8);
}

.sponsors__item {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4) var(--space-6);
    background-color: var(--color-white);
    min-width: 180px;
    height: 80px;
    transition: all var(--transition-base);
    filter: grayscale(100%);
    opacity: 0.6;
}

.sponsors__item:hover {
    filter: grayscale(0%);
    opacity: 1;
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.sponsors__item img {
    max-width: 140px;
    max-height: 50px;
    object-fit: contain;
}

.sponsors__cta {
    text-align: center;
    margin-top: var(--space-10);
    padding-top: var(--space-8);
    border-top: 1px solid var(--color-gray-200);
}

.sponsors__cta-text {
    font-size: var(--text-sm);
    color: var(--color-gray-600);
    margin-bottom: var(--space-4);
}

/* ========================================
   CTA Section
   ======================================== */
.cta {
    padding: var(--space-16) 0;
    background-color: var(--color-accent);
    color: var(--color-black);
    text-align: center;
    position: relative;
    overflow: hidden;
}

/* 斜めストライプ背景 */
.cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 20px,
        rgba(0,0,0,0.03) 20px,
        rgba(0,0,0,0.03) 40px
    );
}

.cta__inner {
    position: relative;
    z-index: 1;
}

.cta__title {
    font-family: var(--font-en);
    font-size: var(--text-4xl);
    font-weight: 900;
    margin-bottom: var(--space-3);
    text-transform: uppercase;
    letter-spacing: -0.02em;
}

.cta__text {
    font-size: var(--text-lg);
    margin-bottom: var(--space-6);
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.cta__buttons {
    display: flex;
    justify-content: center;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.cta .btn--dark {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.cta .btn--outline {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.cta .btn--outline:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
}

/* ========================================
   Footer
   ======================================== */
.footer {
    padding: var(--space-12) 0 var(--space-6);
    background-color: var(--color-gray-900);
    color: var(--color-white);
}

.footer__inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-10);
    margin-bottom: var(--space-10);
}

.footer__brand {
    max-width: 280px;
}

.footer__logo {
    font-family: var(--font-en);
    font-size: var(--text-xl);
    font-weight: 800;
    color: var(--color-white);
    text-transform: uppercase;
    margin-bottom: var(--space-3);
}

.footer__logo span {
    color: var(--color-accent);
}

.footer__description {
    font-size: var(--text-sm);
    color: var(--color-gray-400);
    line-height: 1.7;
}

.footer__nav-title {
    font-family: var(--font-en);
    font-size: var(--text-xs);
    font-weight: 800;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: var(--space-4);
    color: var(--color-accent);
}

.footer__nav-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.footer__nav-link {
    font-size: var(--text-sm);
    color: var(--color-gray-400);
    transition: all var(--transition-fast);
}

.footer__nav-link:hover {
    color: var(--color-white);
    padding-left: var(--space-2);
}

.footer__bottom {
    padding-top: var(--space-6);
    border-top: 1px solid var(--color-gray-800);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer__copyright {
    font-size: var(--text-sm);
    color: var(--color-gray-500);
}

.footer__links {
    display: flex;
    gap: var(--space-6);
}

.footer__link {
    font-size: var(--text-sm);
    color: var(--color-gray-500);
    transition: color var(--transition-fast);
}

.footer__link:hover {
    color: var(--color-white);
}

@media (max-width: 1024px) {
    .footer__inner {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .footer__inner {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }
    
    .footer__bottom {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }
}

/* ========================================
   Animations
   ======================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes slideInUp {
    from {
        transform: translateY(100%);
    }
    to {
        transform: translateY(0);
    }
}

/* Scroll Animation Classes */
[data-animate] {
    opacity: 0;
}

[data-animate="fade-up"] {
    transform: translateY(40px);
}

[data-animate="fade-left"] {
    transform: translateX(-40px);
}

[data-animate="fade-right"] {
    transform: translateX(40px);
}

[data-animate="scale"] {
    transform: scale(0.9);
}

[data-animate].is-visible {
    opacity: 1;
    transform: translate(0) scale(1);
    transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1), 
                transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Stagger delays */
[data-animate-delay="1"] { transition-delay: 0.1s; }
[data-animate-delay="2"] { transition-delay: 0.2s; }
[data-animate-delay="3"] { transition-delay: 0.3s; }
[data-animate-delay="4"] { transition-delay: 0.4s; }
[data-animate-delay="5"] { transition-delay: 0.5s; }

/* Hero specific animations */
.hero .hero__subtitle {
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

.hero .hero__title-line:nth-child(1) .hero__title-text {
    animation: slideInUp 0.6s cubic-bezier(0.4, 0, 0.2, 1) 0.4s both;
}

.hero .hero__title-line:nth-child(2) .hero__title-text {
    animation: slideInUp 0.6s cubic-bezier(0.4, 0, 0.2, 1) 0.5s both;
}

.hero .hero__description {
    animation: fadeInUp 0.6s ease-out 0.7s both;
}

.hero .hero__buttons {
    animation: fadeInUp 0.6s ease-out 0.8s both;
}

.hero .hero__stats {
    animation: fadeInUp 0.6s ease-out 0.9s both;
}