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

:root {
    /* Colors */
    --primary-color: #FF9F40;
    --primary-dark: #FF8000;
    --secondary-color: #FFD93D;
    --accent-blue: #6BCF7F;
    --accent-pink: #FF6B9D;
    --text-dark: #2C3E50;
    --text-light: #7F8C8D;
    --bg-light: #FFF9F3;
    --bg-white: #FFFFFF;
    --border-color: #E8E8E8;
    --shadow: rgba(0, 0, 0, 0.1);
    --shadow-medium: rgba(0, 0, 0, 0.15);
    --shadow-strong: rgba(0, 0, 0, 0.25);
    
    /* LINE & Instagram Colors */
    --line-green: #06C755;
    --instagram-gradient: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    
    /* Typography */
    --font-main: 'Noto Sans JP', sans-serif;
    --font-round: 'M PLUS Rounded 1c', sans-serif;
    
    /* Transitions */
    --transition: all 0.3s ease;
    --transition-slow: all 0.5s ease;
}

html {
    scroll-behavior: smooth;
}

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

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

/* ============================================
   Header
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-white);
    box-shadow: 0 2px 10px var(--shadow);
    z-index: 1000;
    transition: var(--transition);
}

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

.logo a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--primary-color);
    font-size: 1.5rem;
    font-weight: 800;
    font-family: var(--font-round);
    transition: var(--transition);
}

.logo a:hover {
    color: var(--primary-dark);
    transform: scale(1.05);
}

.logo i {
    font-size: 2rem;
}

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

.nav-link {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

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

.nav-link:hover::after {
    width: 80%;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 2px;
    transition: var(--transition);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #FFE5B4 0%, #FFD1B3 50%, #FFBCAD 100%);
    overflow: hidden;
    padding: var(--spacing-xl) var(--spacing-md);
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 150%;
    background: radial-gradient(circle, rgba(255, 159, 64, 0.3) 0%, transparent 70%);
    animation: float 20s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -50%;
    left: -20%;
    width: 80%;
    height: 150%;
    background: radial-gradient(circle, rgba(255, 211, 61, 0.3) 0%, transparent 70%);
    animation: float 25s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-30px) rotate(5deg);
    }
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(1px);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 900px;
}

.hero-icon {
    font-size: 4rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    animation: heartbeat 2s ease-in-out infinite;
}

@keyframes heartbeat {
    0%, 100% {
        transform: scale(1);
    }
    10%, 30% {
        transform: scale(1.1);
    }
    20%, 40% {
        transform: scale(1);
    }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 900;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
    font-family: var(--font-round);
    line-height: 1.3;
    text-shadow: 2px 2px 4px rgba(255, 255, 255, 0.8);
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.3rem);
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

.hero-scroll {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-light);
    font-size: 0.875rem;
    z-index: 2;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    50% {
        transform: translateX(-50%) translateY(-10px);
    }
}

/* Animations */
.animate-fade-in {
    animation: fadeIn 1s ease-out;
}

.animate-fade-in-delay {
    animation: fadeIn 1s ease-out 0.3s both;
}

.animate-fade-in-delay-2 {
    animation: fadeIn 1s ease-out 0.6s both;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-main);
}

.btn-large {
    padding: 1.125rem 2.5rem;
    font-size: 1.125rem;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 4px 15px rgba(255, 159, 64, 0.4);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 159, 64, 0.5);
}

.btn-secondary {
    background: white;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.btn-line {
    background: var(--line-green);
    color: white;
    box-shadow: 0 4px 15px rgba(6, 199, 85, 0.4);
}

.btn-line:hover {
    background: #05b04d;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(6, 199, 85, 0.5);
}

.btn-instagram {
    background: var(--instagram-gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(225, 48, 108, 0.4);
}

.btn-instagram:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(225, 48, 108, 0.5);
}

/* ============================================
   Section Styles
   ============================================ */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 900;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-round);
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--primary-color);
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-light);
    margin-top: var(--spacing-md);
}

/* ============================================
   About Section
   ============================================ */
.about {
    padding: var(--spacing-xl) 0;
    background: var(--bg-white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.feature-card {
    background: white;
    padding: var(--spacing-lg);
    border-radius: 20px;
    box-shadow: 0 5px 20px var(--shadow);
    transition: var(--transition);
    border: 3px solid transparent;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px var(--shadow-medium);
}

.card-orange {
    border-color: var(--primary-color);
}

.card-orange:hover {
    background: linear-gradient(135deg, #FFF5EB 0%, #FFE8D6 100%);
}

.card-blue {
    border-color: var(--accent-blue);
}

.card-blue:hover {
    background: linear-gradient(135deg, #E8F8F5 0%, #D4F1F4 100%);
}

.card-green {
    border-color: #4CAF50;
}

.card-green:hover {
    background: linear-gradient(135deg, #E8F5E9 0%, #C8E6C9 100%);
}

.card-pink {
    border-color: var(--accent-pink);
}

.card-pink:hover {
    background: linear-gradient(135deg, #FFF0F5 0%, #FFE4E9 100%);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    display: inline-block;
}

.card-orange .feature-icon {
    color: var(--primary-color);
}

.card-blue .feature-icon {
    color: var(--accent-blue);
}

.card-green .feature-icon {
    color: #4CAF50;
}

.card-pink .feature-icon {
    color: var(--accent-pink);
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-round);
}

.feature-description {
    color: var(--text-light);
    line-height: 1.8;
}

/* ============================================
   Flow Section
   ============================================ */
.flow {
    padding: var(--spacing-xl) 0;
    background: var(--bg-light);
}

.flow-steps {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    max-width: 1000px;
    margin: 0 auto;
}

.flow-step {
    flex: 1;
    text-align: center;
    position: relative;
}

.flow-number {
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 900;
    margin: 0 auto var(--spacing-sm);
    font-family: var(--font-round);
    box-shadow: 0 4px 15px rgba(255, 159, 64, 0.4);
}

.flow-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.flow-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-round);
}

.flow-description {
    color: var(--text-light);
    line-height: 1.8;
}

.flow-arrow {
    font-size: 2rem;
    color: var(--primary-color);
    flex-shrink: 0;
}

/* ============================================
   Message Section
   ============================================ */
.message {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, #FFE5B4 0%, #FFD1B3 100%);
    position: relative;
    overflow: hidden;
}

.message::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.3) 0%, transparent 50%);
    animation: rotate 30s linear infinite;
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.message-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.message-icon {
    font-size: 4rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    animation: heartbeat 2s ease-in-out infinite;
}

.message-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 900;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
    font-family: var(--font-round);
    line-height: 1.5;
}

.message-subtitle {
    font-size: 1.125rem;
    color: var(--text-light);
}

/* ============================================
   Contact Section
   ============================================ */
.contact {
    padding: var(--spacing-xl) 0;
    background: var(--bg-white);
}

.contact-content {
    max-width: 900px;
    margin: 0 auto;
}

.contact-message {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.contact-intro {
    font-size: 1.125rem;
    color: var(--text-light);
    line-height: 1.9;
}

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

.contact-method {
    background: white;
    padding: var(--spacing-lg);
    border-radius: 20px;
    box-shadow: 0 5px 20px var(--shadow);
    text-align: center;
    transition: var(--transition);
}

.contact-method:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--shadow-medium);
}

.line-method {
    border: 3px solid var(--line-green);
}

.instagram-method {
    border: 3px solid #E1306C;
}

.contact-method-header {
    margin-bottom: var(--spacing-md);
}

.contact-method-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-sm);
}

.line-method .contact-method-icon {
    color: var(--line-green);
}

.instagram-method .contact-method-icon {
    color: #E1306C;
}

.contact-method-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
    font-family: var(--font-round);
    margin-bottom: var(--spacing-sm);
}

.contact-method-description {
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
}

.line-qr-container {
    margin: var(--spacing-md) 0;
    display: flex;
    justify-content: center;
}

.line-qr {
    max-width: 250px;
    width: 100%;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 5px 15px var(--shadow);
}

.instagram-info {
    margin: var(--spacing-md) 0;
}

.instagram-handle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: #E1306C;
    margin-bottom: var(--spacing-sm);
}

.instagram-handle i {
    font-size: 1.5rem;
}

.instagram-note {
    font-size: 0.875rem;
    color: var(--text-light);
    font-style: italic;
}

.contact-note {
    background: var(--bg-light);
    padding: var(--spacing-md);
    border-radius: 15px;
    text-align: center;
}

.contact-note p {
    color: var(--text-light);
    margin: 0.5rem 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.contact-note i {
    color: var(--primary-color);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--text-dark);
    color: white;
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 800;
    font-family: var(--font-round);
    color: var(--primary-color);
}

.footer-logo i {
    font-size: 2rem;
}

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

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-social {
    display: flex;
    gap: var(--spacing-sm);
}

.footer-social a {
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: white;
    font-size: 1.25rem;
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    margin: 0.5rem 0;
    font-size: 0.875rem;
}

.footer-note {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.5);
}

/* ============================================
   Scroll to Top Button
   ============================================ */
.scroll-top {
    position: fixed;
    bottom: var(--spacing-md);
    right: var(--spacing-md);
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.25rem;
    cursor: pointer;
    box-shadow: 0 4px 15px var(--shadow-medium);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    background: var(--primary-dark);
    transform: translateY(-5px);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: white;
        box-shadow: 0 5px 20px var(--shadow);
        max-height: 0;
        overflow: hidden;
        transition: var(--transition);
    }
    
    .nav.active {
        max-height: 500px;
    }
    
    .nav-list {
        flex-direction: column;
        padding: var(--spacing-md);
        gap: 0;
    }
    
    .nav-link {
        display: block;
        padding: var(--spacing-sm);
        border-bottom: 1px solid var(--border-color);
    }
    
    .flow-steps {
        flex-direction: column;
    }
    
    .flow-arrow {
        transform: rotate(90deg);
        margin: var(--spacing-sm) 0;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
    }
    
    .contact-methods {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-md: 1rem;
        --spacing-lg: 2rem;
        --spacing-xl: 2.5rem;
    }
    
    .hero {
        padding: var(--spacing-lg) var(--spacing-sm);
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .hero-buttons .btn {
        width: 100%;
        justify-content: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .line-qr {
        max-width: 200px;
    }
}