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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
    line-height: 1.8;
    color: #333;
    background-color: #fff;
}

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

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

a:hover {
    opacity: 0.7;
}

ul {
    list-style: none;
}

/* ============================================
   コンテナ
   ============================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ============================================
   ヘッダー
   ============================================ */
.header {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 20px 0;
}

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

.logo {
    font-size: 28px;
    font-weight: bold;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav {
    display: flex;
    gap: 30px;
}

.nav a {
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.5px;
    color: #555;
    transition: color 0.3s ease;
}

.nav a:hover {
    color: #667eea;
    opacity: 1;
}

/* ============================================
   ヒーローセクション（背景画像付き）
   ============================================ */
.hero {
    background-image: url('../images/hero-background.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    color: #fff;
    padding: 150px 0 120px;
    text-align: center;
    position: relative;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.7) 0%, rgba(118, 75, 162, 0.7) 100%);
    z-index: 1;
}

.hero .container {
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 52px;
    font-weight: bold;
    margin-bottom: 30px;
    letter-spacing: 3px;
    text-shadow: 2px 2px 10px rgba(0, 0, 0, 0.3);
    line-height: 1.3;
}

.hero-subtitle {
    font-size: 22px;
    line-height: 1.8;
    margin-bottom: 50px;
    font-weight: 300;
    text-shadow: 1px 1px 5px rgba(0, 0, 0, 0.3);
}

.hero-logo {
    font-size: 72px;
    font-weight: bold;
    margin-top: 50px;
    letter-spacing: 6px;
    text-shadow: 3px 3px 15px rgba(0, 0, 0, 0.4);
}

/* ============================================
   セクション共通
   ============================================ */
.section {
    padding: 80px 0;
}

.section-title {
    font-size: 36px;
    font-weight: bold;
    text-align: center;
    margin-bottom: 60px;
    letter-spacing: 2px;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    margin: 20px auto 0;
}

.subsection-title {
    font-size: 28px;
    font-weight: bold;
    text-align: center;
    margin: 60px 0 40px;
}

/* ============================================
   コンセプトセクション
   ============================================ */
.concept-section {
    background-color: #f9f9f9;
}

.video-wrapper {
    max-width: 800px;
    margin: 0 auto 40px;
    position: relative;
    cursor: pointer;
}

.video-thumbnail {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    background-color: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    color: #667eea;
    transition: transform 0.3s ease, background-color 0.3s ease;
}

.video-wrapper:hover .play-button {
    transform: translate(-50%, -50%) scale(1.1);
    background-color: #fff;
}

.concept-list {
    max-width: 900px;
    margin: 0 auto;
}

.concept-list li {
    font-size: 18px;
    line-height: 2;
    padding: 15px 0;
    padding-left: 30px;
    position: relative;
}

.concept-list li::before {
    content: '●';
    position: absolute;
    left: 0;
    color: #667eea;
    font-size: 12px;
}

/* ============================================
   特徴セクション
   ============================================ */
.feature-section {
    background-color: #fff;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    max-width: 1100px;
    margin: 0 auto;
}

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

.feature-image {
    margin-bottom: 30px;
    overflow: hidden;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.feature-image img {
    width: 100%;
    transition: transform 0.3s ease;
}

.feature-item:hover .feature-image img {
    transform: scale(1.05);
}

.feature-title {
    font-size: 22px;
    font-weight: bold;
    margin-bottom: 15px;
    color: #333;
}

.feature-description {
    font-size: 16px;
    line-height: 1.8;
    color: #666;
}

/* ============================================
   問題提起セクション
   ============================================ */
.problem-section {
    background-color: #f9f9f9;
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    max-width: 1100px;
    margin: 0 auto;
}

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

.problem-image {
    margin-bottom: 30px;
    overflow: hidden;
    border-radius: 10px;
}

.problem-image img {
    width: 100%;
}

.problem-title {
    font-size: 22px;
    font-weight: bold;
    margin-bottom: 20px;
    color: #333;
}

.problem-list {
    text-align: left;
    padding: 0 20px;
}

.problem-list li {
    font-size: 15px;
    line-height: 1.8;
    padding: 8px 0;
    padding-left: 20px;
    position: relative;
}

.problem-list li::before {
    content: '・';
    position: absolute;
    left: 0;
    color: #667eea;
}

/* ============================================
   タレントセクション
   ============================================ */
.talent-section {
    background-color: #fff;
}

.talent-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    max-width: 1100px;
    margin: 0 auto;
}

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

.talent-image {
    margin-bottom: 30px;
    overflow: hidden;
    border-radius: 10px;
}

.talent-image img {
    width: 100%;
}

.talent-title {
    font-size: 22px;
    font-weight: bold;
    margin-bottom: 20px;
    color: #333;
}

.talent-list {
    text-align: left;
    padding: 0 20px;
}

.talent-list li {
    font-size: 15px;
    line-height: 1.8;
    padding: 8px 0;
    padding-left: 20px;
    position: relative;
}

.talent-list li::before {
    content: '・';
    position: absolute;
    left: 0;
    color: #667eea;
}

/* ============================================
   ソリューションセクション
   ============================================ */
.solution-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    text-align: center;
}

.solution-section .section-title {
    color: #fff;
}

.solution-section .section-title::after {
    background: #fff;
}

.solution-text {
    font-size: 20px;
    line-height: 2;
    max-width: 900px;
    margin: 0 auto;
}

/* ============================================
   Coming Soonセクション
   ============================================ */
.coming-soon-section {
    background-color: #f9f9f9;
    text-align: center;
}

.coming-soon-text {
    font-size: 16px;
    line-height: 2;
    max-width: 800px;
    margin: 0 auto 40px;
}

.crowdfunding-info {
    margin-top: 40px;
}

.crowdfunding-date {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 30px;
    color: #667eea;
}

/* ============================================
   ボタン
   ============================================ */
.btn {
    display: inline-block;
    padding: 15px 40px;
    font-size: 16px;
    font-weight: bold;
    border-radius: 50px;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.5);
    opacity: 1;
}

/* ============================================
   コンタクトセクション
   ============================================ */
.contact-section {
    background-color: #fff;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 30px;
}

.form-group label {
    display: block;
    font-size: 16px;
    font-weight: bold;
    margin-bottom: 10px;
    color: #333;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    font-size: 16px;
    border: 2px solid #ddd;
    border-radius: 5px;
    transition: border-color 0.3s ease;
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}

.contact-form .btn-primary {
    width: 100%;
    margin-top: 20px;
    font-size: 18px;
    padding: 18px 40px;
}

/* ============================================
   フッター
   ============================================ */
.footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 30px 0;
}

.footer p {
    font-size: 14px;
}

/* ============================================
   レスポンシブデザイン
   ============================================ */
@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 20px;
    }

    .nav {
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
    }

    .nav a {
        font-size: 13px;
    }

    .hero {
        padding: 100px 0 80px;
        min-height: 500px;
    }

    .hero-title {
        font-size: 36px;
        letter-spacing: 2px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .hero-logo {
        font-size: 48px;
        letter-spacing: 4px;
    }

    .section {
        padding: 60px 0;
    }

    .section-title {
        font-size: 28px;
        margin-bottom: 40px;
    }

    .subsection-title {
        font-size: 22px;
        margin: 40px 0 30px;
    }

    .feature-grid,
    .problem-grid,
    .talent-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .concept-list li {
        font-size: 16px;
    }

    .solution-text {
        font-size: 16px;
    }

    .crowdfunding-date {
        font-size: 20px;
    }

    .play-button {
        width: 60px;
        height: 60px;
        font-size: 24px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero {
        padding: 80px 0 60px;
        min-height: 400px;
    }

    .hero-title {
        font-size: 28px;
        letter-spacing: 1px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-logo {
        font-size: 36px;
        letter-spacing: 3px;
    }

    .section-title {
        font-size: 24px;
    }

    .subsection-title {
        font-size: 20px;
    }
}