/* ==========================================
   PostSupporter Landing Page Styles
   ========================================== */

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

:root {
    /* Color Palette */
    --primary-blue: #2563EB;
    --primary-blue-light: #3B82F6;
    --primary-blue-dark: #1E40AF;
    --accent-purple: #8B5CF6;
    --accent-cyan: #06B6D4;
    --gradient-start: #8B5CF6;
    --gradient-end: #06B6D4;
    
    /* Base Colors */
    --bg-white: #FFFFFF;
    --bg-light: #F8FAFC;
    --bg-gray: #F1F5F9;
    --text-dark: #1E293B;
    --text-gray: #64748B;
    --text-light: #94A3B8;
    --border-color: #E2E8F0;
    
    /* Typography */
    --font-ja: 'Noto Sans JP', sans-serif;
    --font-en: 'Inter', sans-serif;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
    
    /* Transitions */
    --transition: all 0.3s ease;
}

/* Language-specific font settings */
html[lang="ja"] body {
    font-family: var(--font-ja);
}

html[lang="en"] body {
    font-family: var(--font-en);
}

body {
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
    overflow-x: hidden;
}

/* Language Toggle */
.language-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    display: flex;
    background: white;
    border-radius: 25px;
    box-shadow: var(--shadow-md);
    padding: 4px;
}

.lang-btn {
    padding: 8px 16px;
    border: none;
    background: transparent;
    color: var(--text-gray);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border-radius: 20px;
    transition: var(--transition);
}

.lang-btn.active {
    background: var(--primary-blue);
    color: white;
}

.lang-btn:hover:not(.active) {
    background: var(--bg-light);
}

/* Header Navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 999;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: 900;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: var(--transition);
}

.nav-menu a:hover {
    color: var(--primary-blue);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 100px 20px 50px;
    background: linear-gradient(135deg, var(--bg-light) 0%, var(--bg-white) 100%);
    position: relative;
}

.hero-container {
    max-width: 1200px;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-title {
    font-size: clamp(32px, 5vw, 56px);
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 24px;
}

.gradient-text {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-gray);
    margin-bottom: 32px;
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
}

.cta-primary, .cta-secondary {
    padding: 16px 32px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-decoration: none;
    display: inline-block;
}

.cta-primary {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    box-shadow: 0 4px 14px 0 rgba(139, 92, 246, 0.3);
}

.cta-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 rgba(139, 92, 246, 0.4);
}

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

.cta-secondary:hover {
    background: var(--bg-light);
}

.hero-note {
    font-size: 14px;
    color: var(--text-gray);
}

/* Phone Mockup */
.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-mockup {
    width: 300px;
    height: 600px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 40px;
    padding: 10px;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.3);
    position: relative;
    animation: float 6s ease-in-out infinite;
}

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

.phone-screen {
    width: 100%;
    height: 100%;
    background: white;
    border-radius: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.app-preview {
    font-size: 24px;
    font-weight: bold;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

.scroll-indicator span {
    font-size: 12px;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.scroll-arrow {
    margin-top: 5px;
    font-size: 20px;
    color: var(--text-light);
}

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

.section-title {
    font-size: clamp(32px, 4vw, 48px);
    font-weight: 900;
    text-align: center;
    margin-bottom: 20px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-gray);
    text-align: center;
    margin-bottom: 60px;
}

/* Problem Section */
.problem-section {
    padding: 100px 0;
    background: var(--bg-light);
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.problem-card {
    background: white;
    padding: 40px;
    border-radius: 20px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

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

.problem-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.problem-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--text-dark);
}

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

/* Solution Section */
.solution-section {
    padding: 100px 0;
    background: white;
    text-align: center;
}

.solution-badge {
    display: inline-block;
    padding: 8px 20px;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 20px;
}

/* Features Section */
.features-section {
    padding: 100px 0;
    background: var(--bg-light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.feature-card {
    background: white;
    padding: 40px;
    border-radius: 20px;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

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

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: var(--text-dark);
}

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

/* Users Section */
.users-section {
    padding: 100px 0;
    background: white;
}

.users-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.user-card {
    text-align: center;
    padding: 30px;
    border-radius: 20px;
    background: var(--bg-light);
    transition: var(--transition);
}

.user-card:hover {
    transform: translateY(-5px);
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.1), rgba(6, 182, 212, 0.1));
}

.user-emoji {
    font-size: 64px;
    margin-bottom: 20px;
}

.user-card h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.user-card p {
    color: var(--text-gray);
}

/* Pricing Section */
.pricing-section {
    padding: 100px 0;
    background: var(--bg-light);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.pricing-card {
    background: white;
    border-radius: 20px;
    padding: 40px;
    position: relative;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.pricing-card.featured {
    transform: scale(1.05);
    box-shadow: var(--shadow-xl);
}

.pricing-card:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

.pricing-card.featured:hover {
    transform: translateY(-5px) scale(1.07);
}

.plan-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    padding: 5px 20px;
    background: var(--bg-gray);
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

.plan-badge.popular {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
}

.plan-name {
    font-size: 24px;
    margin: 20px 0;
    text-align: center;
}

.plan-price {
    text-align: center;
    margin: 30px 0;
}

.currency {
    font-size: 24px;
    color: var(--text-gray);
}

.amount {
    font-size: 48px;
    font-weight: 900;
    color: var(--text-dark);
}

.period {
    font-size: 18px;
    color: var(--text-gray);
}

.plan-features {
    list-style: none;
    margin: 30px 0;
}

.plan-features li {
    padding: 10px 0;
    color: var(--text-gray);
    border-bottom: 1px solid var(--border-color);
}

.plan-features li:last-child {
    border-bottom: none;
}

.plan-button {
    width: 100%;
    padding: 15px;
    border: 2px solid var(--primary-blue);
    background: white;
    color: var(--primary-blue);
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: block;
    text-align: center;
    box-sizing: border-box;
}

.plan-button:hover {
    background: var(--primary-blue);
    color: white;
}

.plan-button.primary {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    border: none;
}

.plan-button.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(139, 92, 246, 0.3);
}

/* Contact Section */
.contact-section {
    padding: 100px 20px;
    background: var(--bg-light);
    text-align: center;
}

.form-container {
    max-width: 800px;
    margin: 40px auto 0;
    background: white;
    border-radius: 20px;
    padding: 20px;
    box-shadow: var(--shadow-lg);
}

.form-container iframe {
    border-radius: 10px;
}

/* Download Section */
.download-section {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    text-align: center;
}

.download-section .section-title {
    color: white;
}

.download-section .section-subtitle {
    color: rgba(255, 255, 255, 0.9);
}

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

.store-button {
    transition: var(--transition);
}

.store-button:hover {
    transform: scale(1.05);
}

.store-button img {
    height: 60px;
}

/* Footer */
.footer {
    background: var(--text-dark);
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-logo {
    font-size: 28px;
    font-weight: 900;
    margin-bottom: 10px;
}

.footer-brand p {
    color: var(--text-light);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-column h4 {
    font-size: 16px;
    margin-bottom: 20px;
    color: white;
}

.footer-column ul {
    list-style: none;
}

.footer-column li {
    margin-bottom: 10px;
}

.footer-column a {
    color: var(--text-light);
    text-decoration: none;
    transition: var(--transition);
}

.footer-column a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-light);
}

/* Responsive Design */
@media (max-width: 768px) {
    /* Contact Form Responsive */
    .form-container {
        padding: 10px;
    }
    
    .form-container iframe {
        height: 1400px;
    }
    
    .nav-menu {
        display: none;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-image {
        order: -1;
        margin-bottom: 40px;
    }
    
    .phone-mockup {
        width: 250px;
        height: 500px;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-primary, .cta-secondary {
        width: 100%;
        max-width: 300px;
    }
    
    .features-grid,
    .problem-grid,
    .users-grid,
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-card.featured {
        transform: scale(1);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    /* Contact Form Mobile */
    .form-container {
        padding: 5px;
        border-radius: 10px;
    }
    
    .form-container iframe {
        height: 1600px;
    }
    
    .language-toggle {
        top: 10px;
        right: 10px;
    }
    
    .hero-title {
        font-size: 28px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .hero-subtitle,
    .section-subtitle {
        font-size: 16px;
    }
}

/* Smooth Scrolling for All Browsers */
html {
    scroll-behavior: smooth;
}

/* Accessibility */
:focus {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}

button:focus-visible {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    .language-toggle,
    .header,
    .scroll-indicator,
    .download-section {
        display: none;
    }
}