/* ===================================
   基本設定
   =================================== */

:root {
    /* カラーパレット */
    --ocean-blue: #1E90FF;
    --ocean-blue-dark: #4169E1;
    --ocean-blue-light: #87CEEB;
    --sunny-yellow: #FFD700;
    --sunny-yellow-dark: #FFA500;
    --sunny-yellow-light: #FFEB3B;
    
    /* グレースケール */
    --white: #FFFFFF;
    --light-gray: #F5F5F5;
    --gray: #CCCCCC;
    --dark-gray: #333333;
    --black: #000000;
    
    /* フォント */
    --font-pixel: 'Press Start 2P', cursive;
    --font-main: 'Noto Sans JP', sans-serif;
    
    /* スペーシング */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 40px;
    --spacing-xl: 64px;
    
    /* ブレークポイント */
    --breakpoint-mobile: 768px;
}

/* リセット */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    color: var(--dark-gray);
    background-color: var(--white);
    line-height: 1.7;
    overflow-x: hidden;
}

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

a {
    color: var(--ocean-blue);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--ocean-blue-dark);
}

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

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

.header {
    background: var(--white);
    border-bottom: 3px solid var(--sunny-yellow);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-family: var(--font-pixel);
    font-size: 16px;
    color: var(--dark-gray);
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: scale(1.05);
}

.logo-icon {
    width: 40px;
    height: 40px;
    /* キャラクターアイコンを後で差し替え可能 */
}

.logo-text {
    color: var(--ocean-blue);
}

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

.nav-list a {
    font-weight: 700;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 8px;
    transition: background 0.3s ease, color 0.3s ease;
}

.nav-list a:hover {
    background: var(--ocean-blue-light);
    color: var(--white);
}

.lang-switch {
    background: var(--light-gray);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 14px;
}

.lang-switch:hover {
    background: var(--sunny-yellow);
    color: var(--dark-gray);
}

/* ハンバーガーメニュー（スマホ用） */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--dark-gray);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

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

.hero {
    position: relative;
    background: linear-gradient(180deg, var(--ocean-blue-light) 0%, var(--ocean-blue) 100%);
    padding: var(--spacing-xl) 0;
    overflow: hidden;
    min-height: 600px;
    display: flex;
    align-items: center;
}

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

/* 波アニメーション */
.wave {
    position: absolute;
    width: 200%;
    height: 100px;
    bottom: 0;
    left: 0;
    background-repeat: repeat-x;
    animation: wave-animation 10s linear infinite;
}

.wave-1 {
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 100"><path fill="%234169E1" fill-opacity="0.3" d="M0,50 Q300,80 600,50 T1200,50 L1200,100 L0,100 Z"></path></svg>');
    animation-duration: 8s;
    bottom: 0;
    opacity: 0.5;
}

.wave-2 {
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 100"><path fill="%231E90FF" fill-opacity="0.4" d="M0,30 Q300,60 600,30 T1200,30 L1200,100 L0,100 Z"></path></svg>');
    animation-duration: 12s;
    bottom: 10px;
    opacity: 0.6;
}

.wave-3 {
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 100"><path fill="%2387CEEB" fill-opacity="0.5" d="M0,60 Q300,30 600,60 T1200,60 L1200,100 L0,100 Z"></path></svg>');
    animation-duration: 15s;
    bottom: 20px;
    opacity: 0.7;
}

@keyframes wave-animation {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

.hero-content {
    position: relative;
    z-index: 10;
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.hero-character {
    flex: 0 0 300px;
}

.character-image {
    width: 100%;
    height: auto;
    animation: float 3s ease-in-out infinite;
    /* キャラクター画像を後で差し替え可能 */
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

.hero-text {
    flex: 1;
    color: var(--white);
}

.hero-title {
    margin-bottom: var(--spacing-md);
}

.title-main {
    display: block;
    font-family: var(--font-pixel);
    font-size: clamp(32px, 5vw, 48px);
    text-shadow: 3px 3px 0 var(--ocean-blue-dark);
    margin-bottom: var(--spacing-sm);
}

.title-sub {
    display: block;
    font-size: clamp(14px, 2.5vw, 20px);
    font-weight: 400;
    opacity: 0.9;
}

.hero-description {
    font-size: clamp(14px, 2vw, 18px);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

.hero-links {
    display: flex;
    gap: var(--spacing-sm);
}

.social-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: var(--white);
    color: var(--dark-gray);
    padding: 12px 24px;
    border-radius: 30px;
    font-weight: 700;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.social-link:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    color: var(--ocean-blue);
}

/* ===================================
   Works セクション
   =================================== */

.works {
    padding: var(--spacing-xl) 0;
    background: var(--light-gray);
}

.section-title {
    font-family: var(--font-pixel);
    font-size: clamp(24px, 4vw, 36px);
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--ocean-blue);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.title-icon {
    font-size: 1.2em;
}

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

.work-card {
    background: var(--white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 3px solid transparent;
}

.work-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
    border-color: var(--sunny-yellow);
}

.work-image {
    position: relative;
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, var(--ocean-blue-light) 0%, var(--ocean-blue) 100%);
    text-align: center;
}

.work-image img {
    width: 150px;
    height: 150px;
    margin: 0 auto;
    border-radius: 20%;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.work-badge {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    display: flex;
    gap: var(--spacing-xs);
}

.work-badge span {
    background: var(--white);
    color: var(--dark-gray);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.badge-ios {
    background: var(--black);
    color: var(--white);
}

.badge-android {
    background: #3DDC84;
    color: var(--white);
}

.badge-steam {
    background: #1B2838;
    color: var(--white);
}

.work-content {
    padding: var(--spacing-md);
}

.work-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--dark-gray);
}

.work-description {
    font-size: 14px;
    line-height: 1.7;
    color: #666;
    margin-bottom: var(--spacing-md);
}

.work-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

/* ボタンスタイル */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--ocean-blue);
    color: var(--white);
    border-color: var(--ocean-blue);
}

.btn-primary:hover {
    background: var(--ocean-blue-dark);
    border-color: var(--ocean-blue-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(30, 144, 255, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--ocean-blue);
    border-color: var(--ocean-blue);
}

.btn-secondary:hover {
    background: var(--ocean-blue);
    color: var(--white);
}

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

.footer {
    background: var(--dark-gray);
    color: var(--white);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

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

.footer-links a {
    color: var(--white);
    font-size: 14px;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.footer-links a:hover {
    opacity: 1;
    color: var(--sunny-yellow);
}

.footer-social a {
    color: var(--white);
    opacity: 0.8;
    transition: all 0.3s ease;
}

.footer-social a:hover {
    opacity: 1;
    transform: scale(1.2);
}

.footer-copy {
    text-align: center;
    font-size: 12px;
    opacity: 0.6;
}

/* ===================================
   レスポンシブ対応
   =================================== */

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-list {
        position: fixed;
        top: 70px;
        right: -100%;
        width: 250px;
        height: calc(100vh - 70px);
        background: var(--white);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
        transition: right 0.3s ease;
        align-items: flex-start;
    }
    
    .nav-list.active {
        right: 0;
    }
    
    .hero-content {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-character {
        flex: 0 0 200px;
    }
    
    .hero-links {
        justify-content: center;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .footer-links {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .works-grid {
        grid-template-columns: 1fr;
    }
    
    .work-links {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
}