/* ==========================================================================
   CSSカスタムプロパティ（デザインシステム）
   ========================================================================== */
:root {
    /* カラーパレット */
    --color-bg-base: #0a0e17;      /* 深みのあるダークブルー/ブラック */
    --color-bg-card: rgba(255, 255, 255, 0.03); /* 半透明ホワイト（グラスモフィズム） */
    --color-border: rgba(255, 255, 255, 0.08);   /* 微細な境界線 */
    
    --color-text-primary: #f3f4f6; /* メインテキスト */
    --color-text-secondary: #9ca3af; /* サブテキスト */
    
    /* アクセントグラデーション */
    --gradient-primary: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%); /* ブルー */
    --gradient-accent: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);  /* ネオンパープル */
    --gradient-text: linear-gradient(135deg, #00f2fe 0%, #a855f7 100%);    /* テキスト用 */
    
    /* タイポグラフィ */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* トランジション */
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    
    /* ボックスシャドウ */
    --glow-shadow: 0 0 30px rgba(79, 172, 254, 0.2);
}

/* ==========================================================================
   ベース設定 & リセット
   ========================================================================== */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--color-bg-base);
    color: var(--color-text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
}

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

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* ==========================================================================
   共通コンポーネント (ボタンなど)
   ========================================================================== */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 50px;
    transition: var(--transition-smooth);
    cursor: pointer;
    border: none;
    text-align: center;
}

.btn-primary {
    background: var(--gradient-accent);
    color: #ffffff;
    box-shadow: 0 4px 20px rgba(139, 92, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(139, 92, 246, 0.5);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--color-text-primary);
    transform: translateY(-3px);
}

.btn-block {
    display: block;
    width: 100%;
}

.text-gradient {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

.section-subtitle {
    color: var(--color-text-secondary);
    font-size: 1.1rem;
}

/* ==========================================================================
   ヘッダー (ナビゲーション)
   ========================================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(10, 14, 23, 0.7);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition-smooth);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-text-primary);
    text-decoration: none;
    letter-spacing: 2px;
}

.logo-accent {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-smooth);
    font-size: 0.95rem;
}

.nav-link:hover {
    color: var(--color-text-primary);
}

/* スマホ用メニュー切り替えボタン */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.menu-toggle .bar {
    width: 25px;
    height: 2px;
    background-color: var(--color-text-primary);
    transition: var(--transition-smooth);
}

/* ==========================================================================
   ヒーローセクション
   ========================================================================== */
.hero-section {
    position: relative;
    padding-top: 180px;
    padding-bottom: 120px;
    overflow: hidden;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 4rem;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 3.8rem;
    line-height: 1.1;
    font-weight: 800;
    margin-bottom: 1.5rem;
    letter-spacing: -0.03em;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    margin-bottom: 2.5rem;
    max-width: 500px;
}

.hero-actions {
    display: flex;
    gap: 1rem;
}

/* ヒーロービジュアルと装飾 */
.hero-visual {
    position: relative;
}

.visual-wrapper {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    border: 1px solid var(--color-border);
}

.visual-image {
    width: 100%;
    height: auto;
    object-fit: cover;
    transition: var(--transition-smooth);
}

.visual-wrapper:hover .visual-image {
    transform: scale(1.03);
}

.visual-glow {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, transparent 60%, rgba(10, 14, 23, 0.8));
    pointer-events: none;
}

.hero-bg-glow {
    position: absolute;
    top: -20%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.15) 0%, transparent 70%);
    z-index: -1;
    filter: blur(80px);
    pointer-events: none;
}

/* ==========================================================================
   サービス紹介セクション
   ========================================================================== */
.services-section {
    padding: 100px 0;
    position: relative;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    backdrop-filter: blur(12px);
    border-radius: 20px;
    padding: 2.5rem;
    transition: var(--transition-smooth);
}

.service-card:hover {
    transform: translateY(-8px);
    border-color: rgba(139, 92, 246, 0.3);
    box-shadow: var(--glow-shadow);
}

.service-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    border-radius: 16px;
    background: rgba(139, 92, 246, 0.1);
    color: #8b5cf6;
    margin-bottom: 1.5rem;
    transition: var(--transition-smooth);
}

.service-card:hover .service-icon {
    background: var(--gradient-accent);
    color: #ffffff;
}

.service-card-title {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

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

/* ==========================================================================
   ギャラリーセクション (Showcase)
   ========================================================================== */
.showcase-section {
    padding: 100px 0;
}

.showcase-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.showcase-item {
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid var(--color-border);
    cursor: pointer;
    transition: var(--transition-smooth);
}

.showcase-item:hover {
    transform: scale(1.02);
    border-color: rgba(0, 242, 254, 0.3);
}

.showcase-image-wrapper {
    position: relative;
    height: 250px;
}

/* 美しいグラデーションプレースホルダー */
.showcase-placeholder {
    width: 100%;
    height: 100%;
    transition: var(--transition-smooth);
}

.gradient-1 {
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
}

.gradient-2 {
    background: linear-gradient(135deg, #581c87 0%, #8b5cf6 100%);
}

.gradient-3 {
    background: linear-gradient(135deg, #134e4a 0%, #10b981 100%);
}

.showcase-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 1.5rem;
    background: linear-gradient(to top, rgba(10, 14, 23, 0.9) 20%, transparent);
}

.showcase-tag {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.showcase-item-title {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 600;
    margin-top: 0.25rem;
}

/* ==========================================================================
   お問い合わせセクション
   ========================================================================== */
.contact-section {
    padding: 100px 0;
    background: radial-gradient(100% 100% at 50% 100%, rgba(139, 92, 246, 0.05) 0%, transparent 100%);
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 4rem;
    align-items: center;
}

.contact-title {
    font-family: var(--font-heading);
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.contact-text {
    color: var(--color-text-secondary);
    font-size: 1.1rem;
    margin-bottom: 2.5rem;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-detail-item {
    font-size: 1.05rem;
}

.contact-detail-item strong {
    color: #8b5cf6;
    margin-right: 0.5rem;
}

.contact-form-wrapper {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    backdrop-filter: blur(12px);
    padding: 3rem;
    border-radius: 24px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.form-group input,
.form-group textarea {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 0.8rem 1rem;
    color: var(--color-text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: var(--transition-smooth);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: rgba(139, 92, 246, 0.5);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 10px rgba(139, 92, 246, 0.2);
}

.form-status {
    font-size: 0.95rem;
    text-align: center;
    margin-top: 1rem;
    min-height: 24px;
    transition: var(--transition-smooth);
}

.form-status.success {
    color: #10b981;
}

.form-status.error {
    color: #ef4444;
}

/* ==========================================================================
   フッター
   ========================================================================== */
.footer {
    padding: 40px 0;
    border-top: 1px solid var(--color-border);
    background-color: #080b12;
}

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

.copyright {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}

.footer-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition-smooth);
}

.footer-link:hover {
    color: var(--color-text-primary);
}

/* ==========================================================================
   レスポンシブデザイン (メディアクエリ)
   ========================================================================== */
@media (max-width: 992px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
    }
    
    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .contact-container {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2.8rem;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .nav {
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--color-bg-base);
        padding: 3rem;
        transform: translateX(100%);
        transition: var(--transition-smooth);
        border-top: 1px solid var(--color-border);
    }
    
    .nav.active {
        transform: translateX(0);
    }
    
    .nav-list {
        flex-direction: column;
        align-items: center;
        gap: 3rem;
    }
    
    .nav-link {
        font-size: 1.5rem;
    }
    
    .menu-toggle.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    
    .menu-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .menu-toggle.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
    
    .contact-form-wrapper {
        padding: 2rem;
    }
    
    .footer-container {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
    }
}