/* ========================================
   Neo-Brutalism / Street Pop Theme
   ======================================== */

:root {
    /* Colors */
    --color-primary: #FFD700; /* Vibrant Yellow */
    --color-secondary: #FF6B6B; /* Pop Red */
    --color-accent: #4ECDC4; /* Teal */
    --color-black: #000000;
    --color-white: #FFFFFF;
    --color-bg: #F0F0F0;
    
    /* Borders & Shadows */
    --border-thick: 4px solid var(--color-black);
    --border-thin: 2px solid var(--color-black);
    --shadow-hard: 6px 6px 0px var(--color-black);
    --shadow-hard-hover: 10px 10px 0px var(--color-black);
    --shadow-hard-sm: 3px 3px 0px var(--color-black);
    
    /* Typography */
    --font-heading: 'Poppins', sans-serif;
    --font-body: 'Noto Sans JP', sans-serif;
    
    /* Spacing */
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    
    /* Radius */
    --radius-sm: 8px;
    --radius-md: 16px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

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

ul {
    list-style: none;
}

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

/* ========================================
   Typography
   ======================================== */

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

.section-title {
    font-size: 3.5rem;
    text-align: center;
    margin-bottom: var(--spacing-sm);
    text-shadow: 3px 3px 0px var(--color-white);
    position: relative;
    display: inline-block;
    padding: 0 20px;
}

.section-title::after {
    content: '';
    display: block;
    width: 100%;
    height: 8px;
    background: var(--color-black);
    margin-top: 5px;
}

.section-subtitle {
    text-align: center;
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    background: var(--color-black);
    color: var(--color-white);
    display: inline-block;
    padding: 5px 15px;
    transform: rotate(-2deg);
}

.center-wrapper {
    text-align: center;
}

/* ========================================
   Components
   ======================================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 16px 32px;
    font-size: 1.2rem;
    font-weight: 900;
    border: var(--border-thick);
    background: var(--color-white);
    color: var(--color-black);
    box-shadow: var(--shadow-hard);
    transition: all 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    cursor: pointer;
    text-transform: uppercase;
    position: relative;
    overflow: hidden;
}

.btn.disabled {
    pointer-events: none;
    cursor: not-allowed;
    opacity: 0.65;
    filter: grayscale(0.8);
}

.btn:hover {
    transform: translate(-2px, -2px);
    box-shadow: var(--shadow-hard-hover);
}

.btn:active {
    transform: translate(4px, 4px);
    box-shadow: 0px 0px 0px var(--color-black);
}

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

.btn-large {
    font-size: 1.5rem;
    padding: 20px 40px;
}

.badge {
    display: inline-block;
    background: var(--color-black);
    color: var(--color-primary);
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 99px;
    font-size: 0.9rem;
    margin-bottom: 1rem;
    border: 2px solid var(--color-white);
}

/* ========================================
   Header
   ======================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: var(--color-white);
    border-bottom: var(--border-thick);
    padding: 15px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 2rem;
    font-weight: 900;
    font-style: italic;
}

.logo-img {
    width: 50px;
    height: 50px;
    border: var(--border-thin);
    border-radius: 50%;
}

.nav {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-link {
    font-weight: 700;
    font-size: 1.1rem;
    position: relative;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 4px;
    background: var(--color-black);
    transition: width 0.3s;
}

.nav-link:hover::before {
    width: 100%;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
}

/* ========================================
   Marquee
   ======================================== */

.marquee-container {
    background: var(--color-black);
    color: var(--color-primary);
    padding: 12px 0;
    overflow: hidden;
    white-space: nowrap;
    border-bottom: var(--border-thick);
    position: relative;
    z-index: 900;
    margin-top: 100px; /* Header height */
    display: flex;
    align-items: center;
}

.marquee-content {
    display: inline-block;
    animation: marquee 40s linear infinite;
    font-family: var(--font-heading);
    font-weight: 900;
    font-size: 1.2rem;
    text-transform: uppercase;
    line-height: 1.0;
    will-change: transform;
}

.marquee-content span {
    margin: 0 40px;
    display: inline-block;
    vertical-align: middle;
}

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

/* ========================================
   Hero Section
   ======================================== */

.hero {
    padding: 80px 0;
    background: var(--color-primary);
    position: relative;
    overflow: hidden;
    border-bottom: var(--border-thick);
}

/* Grid Background Pattern */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(var(--color-black) 1px, transparent 1px),
        linear-gradient(90deg, var(--color-black) 1px, transparent 1px);
    background-size: 40px 40px;
    opacity: 0.05;
    pointer-events: none;
}

.hero-content {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 40px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 5rem;
    line-height: 1;
    margin-bottom: 30px;
    color: var(--color-black);
    text-shadow: 4px 4px 0px var(--color-white);
}

.hero-title .highlight {
    background: var(--color-black);
    color: var(--color-white);
    padding: 0 10px;
    text-shadow: none;
    display: inline-block;
    transform: rotate(-2deg);
}

.hero-description {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 40px;
    background: var(--color-white);
    border: var(--border-thin);
    padding: 20px;
    box-shadow: var(--shadow-hard-sm);
    max-width: 600px;
}

.hero-cta {
    display: flex;
    gap: 20px;
}

.hero-image {
    position: relative;
}

.phone-mockup {
    position: relative;
    z-index: 2;
    transform: rotate(5deg);
    transition: transform 0.3s;
}

.phone-mockup:hover {
    transform: rotate(0deg) scale(1.05);
}

.app-screen {
    border: var(--border-thick);
    border-radius: 40px;
    box-shadow: var(--shadow-hard);
    background: var(--color-white);
}

/* Floating Emojis */
.floating-emoji {
    position: absolute;
    font-size: 4rem;
    animation: float 3s ease-in-out infinite;
    z-index: 0;
    filter: drop-shadow(3px 3px 0px rgba(0,0,0,0.2));
}

.emoji-1 { top: 10%; right: 10%; animation-delay: 0s; }
.emoji-2 { bottom: 20%; left: 45%; animation-delay: 1s; font-size: 5rem; }
.emoji-3 { top: 20%; left: 0%; animation-delay: 2s; }

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(10deg); }
}

/* ========================================
   Features (Tilt Cards)
   ======================================== */

.features {
    padding: 100px 0;
    background: var(--color-white);
    border-bottom: var(--border-thick);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feature-card {
    background: var(--color-bg);
    border: var(--border-thick);
    padding: 30px;
    box-shadow: var(--shadow-hard);
    transition: transform 0.1s;
    position: relative;
}

.feature-card:hover {
    background: var(--color-accent);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    background: var(--color-white);
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: var(--border-thin);
    box-shadow: var(--shadow-hard-sm);
    border-radius: 50%;
}

.feature-title {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

/* ========================================
   Steps
   ======================================== */

.how-it-works {
    padding: 100px 0;
    background: var(--color-secondary);
    color: var(--color-white);
    border-bottom: var(--border-thick);
}

.how-it-works .section-title {
    color: var(--color-white);
    text-shadow: 3px 3px 0px var(--color-black);
}

.how-it-works .section-title::after {
    background: var(--color-white);
}

.steps {
    display: flex;
    gap: 40px;
    margin-top: 60px;
}

.step {
    flex: 1;
    background: var(--color-white);
    color: var(--color-black);
    padding: 30px;
    border: var(--border-thick);
    box-shadow: var(--shadow-hard);
    position: relative;
}

.step-number {
    position: absolute;
    top: -30px;
    left: -20px;
    font-size: 4rem;
    font-weight: 900;
    color: var(--color-primary);
    text-shadow: 2px 2px 0px var(--color-black);
    -webkit-text-stroke: 2px var(--color-black);
}

/* ========================================
   Comparison
   ======================================== */

.why-joyin {
    padding: 100px 0;
    background: #E0E0E0;
    border-bottom: var(--border-thick);
}

/* セクションヘッダー用のスタイル */
.why-joyin .section-title {
    color: var(--color-black);
    text-shadow: 3px 3px 0px var(--color-white);
}

.why-joyin .section-subtitle {
    background: var(--color-black);
    color: var(--color-white);
}

/* comparison-container - align-items変更 */
.comparison-container {
    display: flex;
    gap: 40px;
    align-items: stretch;
}

/* comparison-box - パディング調整とフレックス追加 */
.comparison-box {
    flex: 1;
    background: var(--color-white);
    border: var(--border-thick);
    padding: 40px 30px;
    box-shadow: var(--shadow-hard);
    display: flex;
    flex-direction: column;
}

.comparison-box.others {
    opacity: 0.7;
    transform: scale(0.95);
}

.comparison-box.joyin {
    background: var(--color-primary);
    transform: scale(1.05) rotate(-1deg);
    z-index: 10;
}

.comparison-header h3 {
    font-size: 2rem;
    margin-bottom: 20px;
    text-align: center;
}

/* comparison-list - リスト項目のスペーシング調整 */
.comparison-list {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.comparison-list li {
    font-size: 1.05rem;
    font-weight: 700;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    line-height: 1.5;
}

/* アイコンのスタイル強化 */
.comparison-list li i {
    font-size: 1.2rem;
    flex-shrink: 0;
    margin-top: 2px;
}

.comparison-box.others .comparison-list li i {
    color: var(--color-secondary);
}

.comparison-box.joyin .comparison-list li i {
    color: var(--color-black);
}

/* ========================================
   Download / CTA
   ======================================== */

.download {
    padding: 100px 0;
    background: var(--color-black);
    color: var(--color-primary);
    text-align: center;
    position: relative;
    overflow: hidden;
}

/* Animated Background Stripes */
.download::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 200%;
    height: 100%;
    background: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 20px,
        rgba(255, 255, 255, 0.05) 20px,
        rgba(255, 255, 255, 0.05) 40px
    );
    animation: slide 20s linear infinite;
}

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

.download-content {
    position: relative;
    z-index: 1;
}

.download-title {
    font-size: 4rem;
    color: var(--color-white);
    margin-bottom: 20px;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 40px;
    position: relative;
}

.store-btn {
    background: var(--color-white);
    color: var(--color-black);
    border: var(--border-thick);
    padding: 15px 30px;
    display: flex;
    align-items: center;
    gap: 15px;
    border-radius: 12px;
    box-shadow: 5px 5px 0px var(--color-primary);
    transition: transform 0.2s;
}

.store-btn:hover {
    transform: translate(-3px, -3px);
    box-shadow: 8px 8px 0px var(--color-primary);
}

.store-btn.disabled {
    pointer-events: none;
    cursor: not-allowed;
    filter: grayscale(0.9);
    opacity: 0.65;
}

.download-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.78);
    color: var(--color-primary);
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 900;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    border: var(--border-thick);
    border-radius: 14px;
    box-shadow: var(--shadow-hard);
    z-index: 2;
}

/* ========================================
   FAQ Section (Neo-Brutalism Style)
   ======================================== */

.faq {
    padding: 100px 0;
    background: var(--color-white);
    border-bottom: var(--border-thick);
}

.faq .section-title {
    color: var(--color-black);
    text-shadow: 3px 3px 0px var(--color-primary);
}

.faq .section-subtitle {
    background: var(--color-primary);
    color: var(--color-black);
}

.faq-list {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.faq-item {
    background: var(--color-bg);
    border: var(--border-thick);
    box-shadow: var(--shadow-hard);
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.faq-item:hover {
    transform: translate(-2px, -2px);
    box-shadow: var(--shadow-hard-hover);
}

.faq-item.active {
    background: var(--color-primary);
}

.faq-question {
    padding: 25px 30px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    gap: 20px;
    user-select: none;
}

.faq-question h3 {
    font-size: 1.2rem;
    font-weight: 800;
    margin: 0;
    text-transform: none;
    letter-spacing: 0;
    line-height: 1.5;
}

.faq-question i {
    font-size: 1.5rem;
    color: var(--color-black);
    transition: transform 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    flex-shrink: 0;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.faq-item.active .faq-answer {
    max-height: 600px;
}

.faq-answer p {
    padding: 0 30px 30px;
    margin: 0;
    color: var(--color-black);
    font-size: 1.05rem;
    font-weight: 500;
    line-height: 1.8;
    background: var(--color-white);
    border-top: var(--border-thin);
}

/* ========================================
   Footer
   ======================================== */

.footer {
    background: var(--color-white);
    padding: 60px 0;
    border-top: var(--border-thick);
}

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

.footer-logo {
    font-size: 2rem;
    font-weight: 900;
    margin-bottom: 20px;
}

/* ========================================
   Mobile
   ======================================== */

@media (max-width: 768px) {
    .hero-title { font-size: 3rem; }
    .hero-content { grid-template-columns: 1fr; text-align: center; }
    .hero-description { margin: 0 auto 30px; }
    .hero-cta { justify-content: center; }
    .features-grid { grid-template-columns: 1fr; }
    .steps { flex-direction: column; }
    .comparison-container { flex-direction: column; }
    .nav { display: none; }
    .menu-toggle { display: block; }
    .download-buttons { flex-direction: column; align-items: center; }

    /* 比較表のモバイル対応 */
    .comparison-container {
        flex-direction: column;
        gap: 20px;
    }

    .comparison-box.others,
    .comparison-box.joyin {
        transform: none;
        opacity: 1;
    }

    .comparison-list li {
        font-size: 1rem;
    }

    /* FAQのモバイル対応 */
    .faq {
        padding: 60px 0;
    }

    .faq-list {
        gap: 15px;
    }

    .faq-question {
        padding: 20px;
        gap: 15px;
    }

    .faq-question h3 {
        font-size: 1.05rem;
    }

    .faq-question i {
        font-size: 1.2rem;
    }

    .faq-answer p {
        padding: 0 20px 20px;
        font-size: 0.95rem;
        line-height: 1.7;
    }
}