/* ========================================
   Variables & Base
   ======================================== */
:root {
    /* Colors */
    --color-bg: #0a0a0f;
    --color-bg-light: #131318;
    --color-primary: #00d9ff;
    --color-secondary: #0088ff;
    --color-accent: #00ffaa;
    --color-text: #ffffff;
    --color-text-muted: #a0a0b0;
    --color-glass: rgba(255, 255, 255, 0.05);
    --color-glass-border: rgba(255, 255, 255, 0.1);
    
    /* Shadows */
    --shadow-glow: 0 0 30px rgba(0, 217, 255, 0.3);
    --shadow-soft: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-hard: 0 4px 16px rgba(0, 0, 0, 0.5);
    
    /* Typography */
    --font-main: 'Helvetica Neue', 'Yu Gothic', 'Hiragino Sans', sans-serif;
    --font-display: 'Orbitron', 'Noto Sans JP', sans-serif;
    
    /* Spacing */
    --section-padding: 120px;
    --container-max: 1200px;
    
    /* Transitions */
    --transition-smooth: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: all 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    overflow-x: hidden;
    position: relative;
}

/* Particle Canvas Background */
#particleCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* ========================================
   Typography
   ======================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
}

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

/* ========================================
   Container & Layout
   ======================================== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 1;
}

.section {
    padding: var(--section-padding) 0;
    position: relative;
    z-index: 1;
}

/* ========================================
   Navigation
   ======================================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-glass-border);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 20px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 0.05em;
}

.nav-links {
    display: flex;
    gap: 40px;
}

.nav-link {
    font-size: 15px;
    font-weight: 500;
    opacity: 0.8;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    transition: width 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    opacity: 1;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-social {
    display: flex;
    gap: 16px;
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--color-glass);
    border: 1px solid var(--color-glass-border);
    transition: var(--transition-smooth);
}

.social-link:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 28px;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition-smooth);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    /* align-items: center; を維持しつつ、視覚的に少し下げるために padding を調整 */
    align-items: center; 
    justify-content: center;
    position: relative;
    overflow: hidden;
    /* ナビゲーションの高さ(80px) + 余裕分として少し増やす */
    padding-top: 100px; 
}

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

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.3;
    filter: blur(2px);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px; /* 少し広げてゆとりを持たせる */
    padding: 0 24px;
    
    /* 【追加】JSでスクロールに合わせて操作するための設定 */
    transition: opacity 0.3s ease-out, transform 0.3s ease-out;
    /* 【修正】位置を少しだけ下にオフセット */
    margin-top: 20px; 
}

.hero-title {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 32px;
}

.hero-title-main {
    /* clampの最大値を少し抑えて(80px→72px)、圧迫感を軽減 */
    font-size: clamp(40px, 8vw, 72px); 
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    /* 字間を少し広げて高級感を出す */
    letter-spacing: 0.1em; 
    line-height: 1.2;
}

.hero-title-sub {
    font-size: clamp(20px, 3vw, 28px);
    font-weight: 300;
    letter-spacing: 0.15em;
    opacity: 0.9;
}

.hero-description {
    /* 文字サイズを少し抑えてメインタイトルを立たせる */
    font-size: 16px; 
    color: var(--color-text-muted);
    margin-bottom: 40px;
    line-height: 1.8;
    /* 読みやすさのために少し透明度を上げる */
    opacity: 0.8;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    opacity: 0.6;
    font-size: 12px;
    letter-spacing: 0.2em;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--color-primary), transparent);
    animation: scrollPulse 2s infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: translateY(0); }
    50% { opacity: 1; transform: translateY(10px); }
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 16px 32px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-smooth);
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: var(--color-bg);
    box-shadow: 0 4px 20px rgba(0, 217, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 217, 255, 0.5);
}

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

.btn-secondary:hover {
    background: var(--color-glass-border);
    border-color: var(--color-primary);
}

/* ========================================
   Section Titles
   ======================================== */
.section-title {
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 700;
    text-align: center;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    text-align: center;
    color: var(--color-text-muted);
    font-size: 16px;
    margin-bottom: 64px;
}

.page-title {
    font-size: clamp(48px, 8vw, 80px);
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
}

.page-subtitle {
    font-size: 20px;
    color: var(--color-text-muted);
    letter-spacing: 0.1em;
}

/* ========================================
   Workflow Section
   ======================================== */
.workflow-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
    margin-top: 64px;
}

.workflow-card {
    background: var(--color-glass);
    border: 1px solid var(--color-glass-border);
    border-radius: 20px;
    padding: 40px 32px;
    text-align: center;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.workflow-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    transform: scaleX(0);
    transition: transform 0.5s ease;
}

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

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

.workflow-number {
    font-size: 48px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 24px;
}

.workflow-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 16px;
}

.workflow-text {
    font-size: 15px;
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* ========================================
   Pricing Section
   ======================================== */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
    margin-top: 64px;
}

.pricing-card {
    background: var(--color-glass);
    border: 1px solid var(--color-glass-border);
    border-radius: 20px;
    padding: 40px 32px;
    transition: var(--transition-smooth);
    position: relative;
}

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

.pricing-card-disabled {
    opacity: 0.5;
    pointer-events: none;
}

.pricing-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    background: rgba(255, 100, 100, 0.2);
    color: #ff6464;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.pricing-header {
    border-bottom: 1px solid var(--color-glass-border);
    padding-bottom: 24px;
    margin-bottom: 24px;
}

.pricing-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 16px;
}

.pricing-price {
    font-size: 32px;
    font-weight: 700;
    color: var(--color-primary);
}

.pricing-price span {
    font-size: 18px;
    margin: 0 8px;
}

.pricing-features {
    list-style: none;
}

.pricing-features li {
    padding: 12px 0;
    font-size: 15px;
    color: var(--color-text-muted);
    position: relative;
    padding-left: 24px;
}

.pricing-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: 700;
}

.pricing-additional {
    margin-top: 64px;
    padding: 32px;
    background: var(--color-glass);
    border: 1px solid var(--color-glass-border);
    border-radius: 20px;
    display: flex;
    gap: 48px;
    justify-content: center;
    flex-wrap: wrap;
}

.additional-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
    text-align: center;
}

.additional-label {
    font-size: 14px;
    color: var(--color-text-muted);
}

.additional-value {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-primary);
}

/* ========================================
   Template Section
   ======================================== */
.template-box {
    background: var(--color-glass);
    border: 1px solid var(--color-glass-border);
    border-radius: 20px;
    padding: 48px;
    margin-top: 64px;
}

.template-content h3 {
    font-size: 24px;
    margin-bottom: 32px;
    color: var(--color-primary);
}

.template-list {
    list-style: none;
}

.template-list > li {
    margin-bottom: 24px;
    font-size: 16px;
}

.template-list strong {
    color: var(--color-primary);
    display: block;
    margin-bottom: 8px;
}

.template-list > li > span {
    color: var(--color-text-muted);
    font-size: 14px;
    margin-left: 8px;
}

.template-sublist {
    list-style: none;
    margin-top: 12px;
    padding-left: 20px;
}

.template-sublist li {
    color: var(--color-text-muted);
    font-size: 14px;
    margin-bottom: 8px;
    position: relative;
    padding-left: 16px;
}

.template-sublist li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-primary);
}

.template-cta {
    margin-top: 48px;
    text-align: center;
    padding-top: 48px;
    border-top: 1px solid var(--color-glass-border);
}

.template-cta p {
    font-size: 18px;
    margin-bottom: 24px;
}

/* ========================================
   Notes Section
   ======================================== */
.notes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin-top: 64px;
}

.note-item {
    background: var(--color-glass);
    border: 1px solid var(--color-glass-border);
    border-radius: 16px;
    padding: 24px;
    display: flex;
    gap: 16px;
    align-items: flex-start;
    transition: var(--transition-smooth);
}

.note-item:hover {
    border-color: var(--color-primary);
    transform: translateX(4px);
}

.note-icon {
    font-size: 24px;
    flex-shrink: 0;
}

.note-item p {
    font-size: 14px;
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* ========================================
   Portfolio Link
   ======================================== */
.portfolio-link-box {
    text-align: center;
    padding: 80px 40px;
    background: var(--color-glass);
    border: 1px solid var(--color-glass-border);
    border-radius: 20px;
    position: relative;
    overflow: hidden;
}

.portfolio-link-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary), var(--color-accent));
}

.portfolio-link-box h2 {
    font-size: 36px;
    margin-bottom: 16px;
}

.portfolio-link-box p {
    font-size: 18px;
    color: var(--color-text-muted);
    margin-bottom: 32px;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--color-bg-light);
    border-top: 1px solid var(--color-glass-border);
    padding: 64px 0 32px;
    position: relative;
    z-index: 1;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 32px;
    margin-bottom: 32px;
}

.footer-logo {
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-links {
    display: flex;
    gap: 32px;
    flex-wrap: wrap;
}

.footer-links a {
    font-size: 14px;
    color: var(--color-text-muted);
    transition: var(--transition-smooth);
}

.footer-links a:hover {
    color: var(--color-primary);
}

.footer-social {
    display: flex;
    gap: 16px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--color-glass);
    border: 1px solid var(--color-glass-border);
    transition: var(--transition-smooth);
}

.footer-social a:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.footer-bottom {
    text-align: center;
    padding-top: 32px;
    border-top: 1px solid var(--color-glass-border);
}

.footer-bottom p {
    font-size: 14px;
    color: var(--color-text-muted);
}

/* ========================================
   Profile Hero
   ======================================== */
.profile-hero,
.vocaduet-hero,
.music-hero {
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding-top: 120px;
    padding-bottom: 80px;
}

.profile-hero-bg,
.vocaduet-hero-bg,
.music-hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.profile-hero-image,
.vocaduet-hero-bg img,
.music-hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.2;
}

.profile-hero .container,
.vocaduet-hero .container,
.music-hero .container {
    position: relative;
    z-index: 1;
    text-align: center;
}

/* ========================================
   About Section
   ======================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: start;
    margin-top: 64px;
}

.about-description {
    font-size: 18px;
    line-height: 1.9;
    color: var(--color-text-muted);
    margin-bottom: 48px;
}

.about-achievement {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 32px;
    background: var(--color-glass);
    border: 1px solid var(--color-glass-border);
    border-radius: 16px;
}

.achievement-number {
    font-size: 64px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.achievement-label {
    font-size: 16px;
    color: var(--color-text-muted);
}

.about-info {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.info-box {
    background: var(--color-glass);
    border: 1px solid var(--color-glass-border);
    border-radius: 16px;
    padding: 32px;
}

.info-box h3 {
    font-size: 20px;
    margin-bottom: 16px;
    color: var(--color-primary);
}

.info-list {
    list-style: none;
}

.info-list li {
    padding: 12px 0;
    font-size: 16px;
    color: var(--color-text-muted);
    position: relative;
    padding-left: 24px;
}

.info-list li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-size: 20px;
}

/* ========================================
   Timeline
   ======================================== */
.timeline-list {
    margin-top: 64px;
    position: relative;
    padding-left: 40px;
}

.timeline-list::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--color-primary), var(--color-secondary));
}

.timeline-item {
    margin-bottom: 48px;
    position: relative;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -47px;
    top: 8px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-primary);
    border: 3px solid var(--color-bg);
    box-shadow: 0 0 20px var(--color-primary);
}

.timeline-date {
    font-size: 14px;
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: 12px;
    letter-spacing: 0.05em;
}

.timeline-content h3 {
    font-size: 20px;
    margin-bottom: 8px;
}

.timeline-content p {
    font-size: 15px;
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* ========================================
   Works Section
   ======================================== */
.works-note {
    text-align: center;
    margin: 48px 0;
    padding: 24px;
    background: var(--color-glass);
    border: 1px solid var(--color-glass-border);
    border-radius: 12px;
}

.works-note a {
    color: var(--color-primary);
    text-decoration: underline;
}

.works-note a:hover {
    color: var(--color-secondary);
}

.works-cta {
    text-align: center;
    margin-top: 48px;
}

/* ========================================
   Vocaduet Section
   ======================================== */
.vocaduet-year {
    margin-bottom: 64px;
}

.year-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 48px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--color-glass-border);
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.vocaduet-card {
    background: var(--color-glass);
    border: 1px solid var(--color-glass-border);
    border-radius: 20px;
    padding: 32px;
    margin-bottom: 48px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
    transition: var(--transition-smooth);
}

.vocaduet-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow);
}

.vocaduet-video {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    border-radius: 12px;
}

.vocaduet-video iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.vocaduet-song {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--color-primary);
}

.vocaduet-team {
    font-size: 16px;
    color: var(--color-text-muted);
    margin-bottom: 24px;
    font-style: italic;
}

.vocaduet-credits {
    list-style: none;
}

.vocaduet-credits li {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid var(--color-glass-border);
    font-size: 14px;
}

.credit-role {
    color: var(--color-text-muted);
    font-weight: 500;
}

.credit-name {
    color: var(--color-text);
    font-weight: 600;
}

/* ========================================
   Music Section
   ======================================== */
.music-list {
    margin-top: 64px;
    display: flex;
    flex-direction: column;
    gap: 48px;
}

.music-card {
    background: var(--color-glass);
    border: 1px solid var(--color-glass-border);
    border-radius: 20px;
    padding: 40px;
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
    align-items: start;
    transition: var(--transition-smooth);
}

.music-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.music-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 12px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.music-artist {
    font-size: 16px;
    color: var(--color-text-muted);
    margin-bottom: 24px;
    font-style: italic;
}

.music-credits {
    list-style: none;
}

.music-credits li {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid var(--color-glass-border);
    font-size: 14px;
}

.music-platforms {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.platform-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 24px;
    background: var(--color-glass);
    border: 1px solid var(--color-glass-border);
    border-radius: 12px;
    transition: var(--transition-smooth);
    font-size: 14px;
    font-weight: 600;
}

.platform-link:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-bg);
    transform: translateX(4px);
}

.platform-link svg {
    flex-shrink: 0;
}