/* ============================================
   CareNavi Landing Page Styles
   ============================================ */

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

:root {
    /* Color Palette - 温かみのある色合い */
    --primary-color: #FF6B6B;
    --primary-dark: #E85555;
    --primary-light: #FFE5E5;
    --secondary-color: #4ECDC4;
    --secondary-dark: #3DB8B0;
    --accent-color: #FFE66D;

    /* Neutral Colors */
    --text-dark: #2C3E50;
    --text-light: #7F8C8D;
    --bg-white: #FFFFFF;
    --bg-light: #F8F9FA;
    --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Typography */
    --font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.15);

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;

    /* Transitions */
    --transition-base: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
}

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

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

/* ============================================
   Navigation
   ============================================ */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition-base);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

.logo i {
    font-size: 1.8rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-links a {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-base);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
}

.nav-links a:hover {
    color: var(--primary-color);
    background-color: var(--primary-light);
}

.btn-login {
    background-color: var(--primary-color);
    color: white !important;
    padding: var(--spacing-xs) var(--spacing-md) !important;
    border-radius: var(--radius-md);
}

.btn-login:hover {
    background-color: var(--primary-dark) !important;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-dark);
    cursor: pointer;
}

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

.hero {
    margin-top: 80px;
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, #FFF5F5 0%, #FFF0F5 50%, #F0F8FF 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255, 107, 107, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
}

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

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.hero-text {
    animation: fadeInLeft 1s ease-out;
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
    color: var(--text-dark);
}

.highlight {
    color: var(--primary-color);
    position: relative;
    display: inline-block;
}

.highlight::after {
    content: '';
    position: absolute;
    bottom: 5px;
    left: 0;
    width: 100%;
    height: 10px;
    background-color: var(--accent-color);
    opacity: 0.3;
    z-index: -1;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.hero-cta {
    margin-bottom: var(--spacing-md);
}

.cta-note {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-top: var(--spacing-sm);
}

.hero-features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.feature-badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    font-size: 0.9rem;
    color: var(--text-dark);
}

.feature-badge i {
    color: var(--secondary-color);
}

.hero-image {
    animation: fadeInRight 1s ease-out;
}

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

.image-placeholder {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    border: 2px dashed var(--primary-light);
}

.image-placeholder i {
    font-size: 5rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.image-placeholder p {
    color: var(--text-light);
    font-size: 1.1rem;
}

/* ============================================
   Buttons
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: var(--transition-base);
    cursor: pointer;
    border: none;
    font-family: var(--font-family);
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    box-shadow: 0 4px 15px rgba(255, 107, 107, 0.3);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 107, 107, 0.4);
}

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

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

.btn-large {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1.2rem;
}

/* ============================================
   Problems Section
   ============================================ */

.problems {
    padding: var(--spacing-xl) 0;
    background-color: var(--bg-white);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
}

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

.problem-card {
    background: white;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: var(--transition-base);
    border: 2px solid transparent;
}

.problem-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.problem-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-light) 0%, #FFD0D0 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
}

.problem-icon i {
    font-size: 2rem;
    color: var(--primary-color);
}

.problem-card h3 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-dark);
}

.problem-card p {
    color: var(--text-light);
    line-height: 1.6;
}

.solution-banner {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    text-align: center;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
}

.solution-banner h3 {
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.solution-banner i {
    animation: bounce 2s infinite;
}

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

/* ============================================
   Features Section
   ============================================ */

.features {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(180deg, var(--bg-white) 0%, var(--bg-light) 100%);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-md);
}

.feature-card {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    border-left: 4px solid var(--secondary-color);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--secondary-dark) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.feature-icon i {
    font-size: 2rem;
    color: white;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-dark);
}

.feature-card > p {
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.feature-list {
    list-style: none;
    padding: 0;
}

.feature-list li {
    padding: var(--spacing-xs) 0;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.feature-list i {
    color: var(--secondary-color);
    font-size: 0.9rem;
}

/* ============================================
   Benefits Section
   ============================================ */

.benefits {
    padding: var(--spacing-xl) 0;
    background: white;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.benefit-card {
    text-align: center;
    padding: var(--spacing-lg);
}

.benefit-icon {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--accent-color) 0%, #FFD700 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    box-shadow: var(--shadow-md);
}

.benefit-icon i {
    font-size: 2.5rem;
    color: var(--text-dark);
}

.benefit-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-dark);
}

.benefit-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* ============================================
   Pricing Section
   ============================================ */

.pricing {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(180deg, var(--bg-light) 0%, var(--bg-white) 100%);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.pricing-card {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-lg);
    transition: var(--transition-base);
    position: relative;
    border: 2px solid transparent;
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.pricing-card.featured {
    border-color: var(--primary-color);
    box-shadow: 0 10px 40px rgba(255, 107, 107, 0.2);
}

.popular-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.9rem;
    box-shadow: var(--shadow-md);
}

.plan-header {
    text-align: center;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--bg-light);
}

.plan-header h3 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-dark);
}

.plan-price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: var(--spacing-xs);
}

.price {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
}

.period {
    font-size: 1.2rem;
    color: var(--text-light);
}

.plan-features {
    margin-bottom: var(--spacing-md);
}

.plan-description {
    text-align: center;
    color: var(--text-light);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
}

.plan-features ul {
    list-style: none;
    padding: 0;
}

.plan-features li {
    padding: var(--spacing-sm) 0;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.plan-features i {
    color: var(--secondary-color);
    font-size: 1rem;
    flex-shrink: 0;
}

.pricing-card .btn {
    width: 100%;
    justify-content: center;
}

.pricing-note {
    text-align: center;
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

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

.pricing-note i {
    color: var(--secondary-color);
}

/* ============================================
   CTA Section
   ============================================ */

.cta-section {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before,
.cta-section::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
}

.cta-section::before {
    top: -200px;
    left: -100px;
}

.cta-section::after {
    bottom: -200px;
    right: -100px;
}

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

.cta-content h2 {
    font-size: 2.5rem;
    color: white;
    margin-bottom: var(--spacing-sm);
}

.cta-content > p {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-lg);
}

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

.cta-content .btn-primary:hover {
    background-color: var(--bg-light);
    transform: translateY(-3px);
}

.cta-subtext {
    margin-top: var(--spacing-sm);
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
}

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

.footer {
    background-color: var(--text-dark);
    color: white;
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-section h4 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-md);
    color: var(--accent-color);
}

.footer-section ul {
    list-style: none;
    padding: 0;
}

.footer-section li {
    margin-bottom: var(--spacing-sm);
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition-base);
}

.footer-section a:hover {
    color: var(--accent-color);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.footer-logo i {
    color: var(--primary-color);
    font-size: 1.8rem;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
}

/* ============================================
   Scroll to Top Button
   ============================================ */

.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
    z-index: 999;
}

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

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

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 992px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .hero-image {
        order: -1;
    }

    .hero-title {
        font-size: 2rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .pricing-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }

    .hero {
        padding: var(--spacing-lg) 0;
    }

    .hero-title {
        font-size: 1.8rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .problems-grid {
        grid-template-columns: 1fr;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .benefits-grid {
        grid-template-columns: 1fr;
    }

    .cta-content h2 {
        font-size: 2rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .scroll-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-md: 1rem;
        --spacing-lg: 2rem;
        --spacing-xl: 3rem;
    }

    .hero-title {
        font-size: 1.5rem;
    }

    .btn-large {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .feature-card,
    .problem-card,
    .pricing-card {
        padding: var(--spacing-md);
    }
}

/* ============================================
   Animations
   ============================================ */

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Intersection Observer animation classes */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}