/* 樱语 Homepage - Modern Glassmorphic Design System */

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

/* CSS Variables - Sakura Theme */
:root {
    /* Sakura Color Palette */
    --sakura-primary: #FF6B9D;
    --sakura-secondary: #F8BBD9;
    --sakura-accent: #E1B3D3;
    --sakura-soft: #FAE4F4;
    
    /* Glassmorphic Colors */
    --glass-white: rgba(255, 255, 255, 0.25);
    --glass-white-strong: rgba(255, 255, 255, 0.4);
    --glass-pink: rgba(248, 187, 217, 0.15);
    --glass-border: rgba(255, 255, 255, 0.3);
    
    /* Neutral Colors */
    --white: #FFFFFF;
    --black: #000000;
    --gray-900: #1A1A1A;
    --gray-800: #2D2D2D;
    --gray-700: #4A4A4A;
    --gray-600: #6B6B6B;
    --gray-500: #8B8B8B;
    --gray-400: #A8A8A8;
    --gray-300: #C7C7C7;
    --gray-200: #E1E1E1;
    --gray-100: #F5F5F5;
    --gray-50: #FAFAFA;
    
    /* Background Gradients */
    --bg-gradient: linear-gradient(135deg, 
        rgba(248, 187, 217, 0.1) 0%,
        rgba(255, 255, 255, 0.05) 50%,
        rgba(225, 179, 211, 0.1) 100%);
    
    --hero-gradient: radial-gradient(ellipse at top left,
        rgba(248, 187, 217, 0.15) 0%,
        rgba(255, 255, 255, 0.05) 50%,
        rgba(225, 179, 211, 0.1) 100%);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --glass-shadow: 0 8px 32px rgba(248, 187, 217, 0.2);
    
    /* Typography Scale */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'SF Mono', Consolas, 'Liberation Mono', monospace;
    
    /* Spacing Scale */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Animation */
    --transition-fast: 0.15s ease-out;
    --transition-medium: 0.3s ease-out;
    --transition-slow: 0.5s ease-out;
}

/* Base Styles */
html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--gray-800);
    background: var(--white);
    background-image: var(--bg-gradient);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-4);
    }
}

/* Glassmorphic Effect */
.glassmorphic {
    background: var(--glass-white);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--gray-900);
    margin-bottom: var(--space-4);
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.875rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1.125rem; }

@media (max-width: 768px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.5rem; }
}

p {
    margin-bottom: var(--space-4);
    color: var(--gray-600);
}

.gradient-text {
    background: linear-gradient(135deg, var(--sakura-primary), var(--sakura-accent));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: var(--space-4) 0;
    transition: var(--transition-medium);
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--gray-900);
    text-decoration: none;
}

.logo-icon {
    font-size: 1.75rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

@media (max-width: 768px) {
    .nav-links {
        gap: var(--space-4);
    }
}

.nav-link {
    font-weight: 500;
    color: var(--gray-700);
    text-decoration: none;
    transition: var(--transition-fast);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
}

.nav-link:hover {
    color: var(--sakura-primary);
    background: var(--glass-pink);
}

.cta-link {
    background: var(--sakura-primary);
    color: var(--white) !important;
    font-weight: 600;
}

.cta-link:hover {
    background: var(--sakura-accent);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-6);
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-xl);
    transition: var(--transition-medium);
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: var(--sakura-primary);
    color: var(--white);
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
    background: var(--sakura-accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.btn-secondary {
    background: var(--glass-white-strong);
    backdrop-filter: blur(20px);
    color: var(--gray-700);
    border: 1px solid var(--glass-border);
}

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

.btn-arrow {
    transition: var(--transition-fast);
}

.btn-secondary:hover .btn-arrow {
    transform: translateX(4px);
}

/* Hero Section */
.hero {
    position: relative;
    padding: var(--space-24) 0 var(--space-16);
    background: var(--hero-gradient);
    overflow: hidden;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
}

@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--space-12);
    }
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    background: var(--glass-white);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: var(--space-6);
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--space-6);
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
}

.hero-description {
    font-size: 1.25rem;
    color: var(--gray-600);
    margin-bottom: var(--space-8);
    max-width: 500px;
}

@media (max-width: 1024px) {
    .hero-description {
        margin: 0 auto var(--space-8);
    }
}

.hero-actions {
    display: flex;
    gap: var(--space-4);
    margin-bottom: var(--space-12);
}

@media (max-width: 768px) {
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
}

.hero-stats {
    display: flex;
    gap: var(--space-8);
}

@media (max-width: 768px) {
    .hero-stats {
        justify-content: center;
    }
}

.stat-item {
    text-align: left;
}

@media (max-width: 1024px) {
    .stat-item {
        text-align: center;
    }
}

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--sakura-primary);
    line-height: 1;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-top: var(--space-1);
}

/* Hero Visual */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-mockup {
    position: relative;
    z-index: 2;
}

.hero-visual .phone-frame {
    width: 300px;
    height: 600px;
    background: linear-gradient(145deg, #1d1d1f, #000000);
    border-radius: 50px;
    padding: 8px;
    box-shadow: 
        0 30px 60px rgba(0, 0, 0, 0.4),
        0 10px 20px rgba(0, 0, 0, 0.2),
        inset 0 1px 2px rgba(255, 255, 255, 0.1);
    position: relative;
    border: 2px solid #2d2d2f;
}

.hero-visual .phone-frame::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 30px;
    background: #000000;
    border-radius: 20px;
    z-index: 10;
}

.hero-visual .phone-frame::after {
    content: '';
    position: absolute;
    top: 28px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 6px;
    background: #333;
    border-radius: 3px;
    z-index: 11;
}

.hero-visual .phone-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, 
        rgba(248, 187, 217, 0.08) 0%,
        rgba(255, 255, 255, 0.03) 50%,
        rgba(225, 179, 211, 0.08) 100%);
    border-radius: 42px;
    overflow: hidden;
    position: relative;
    backdrop-filter: blur(10px);
}

.screenshot {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.floating-card {
    position: absolute;
    background: var(--glass-white);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--space-4);
    box-shadow: var(--glass-shadow);
    animation: float 3s ease-in-out infinite;
}

.card-1 {
    top: 10%;
    right: -20%;
    animation-delay: 0s;
}

.card-2 {
    bottom: 20%;
    left: -25%;
    animation-delay: 1.5s;
}

.card-content .japanese {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-1);
}

.card-content .reading {
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-bottom: var(--space-2);
}

.card-content .chinese {
    font-size: 1rem;
    color: var(--sakura-primary);
    font-weight: 600;
}

.ai-badge {
    display: inline-block;
    background: var(--sakura-primary);
    color: var(--white);
    font-size: 0.75rem;
    font-weight: 700;
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-2);
}

.ai-text {
    font-size: 0.875rem;
    color: var(--gray-600);
}

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

/* Sakura Petals Animation */
.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    pointer-events: none;
}

.sakura-petals {
    position: absolute;
    width: 100%;
    height: 100%;
}

.petal {
    position: absolute;
    font-size: 2rem;
    opacity: 0.6;
    animation: fall linear infinite;
}

.petal-1 { left: 10%; animation-duration: 8s; animation-delay: 0s; }
.petal-2 { left: 25%; animation-duration: 10s; animation-delay: 2s; }
.petal-3 { left: 50%; animation-duration: 12s; animation-delay: 4s; }
.petal-4 { left: 75%; animation-duration: 9s; animation-delay: 1s; }
.petal-5 { left: 90%; animation-duration: 11s; animation-delay: 3s; }

@keyframes fall {
    0% {
        transform: translateY(-100vh) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 0.6;
    }
    90% {
        opacity: 0.6;
    }
    100% {
        transform: translateY(100vh) rotate(360deg);
        opacity: 0;
    }
}

/* Sections */
section {
    padding: var(--space-20) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-16);
}

.section-title {
    margin-bottom: var(--space-4);
}

.section-description {
    font-size: 1.25rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Features Section */
.features {
    background: var(--glass-pink);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-8);
}

@media (max-width: 768px) {
    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }
}

.feature-card {
    padding: var(--space-8);
    border-radius: var(--radius-2xl);
    text-align: center;
    transition: var(--transition-medium);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--sakura-primary), var(--sakura-accent));
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--space-4);
}

.feature-title {
    font-size: 1.5rem;
    margin-bottom: var(--space-3);
    color: var(--gray-900);
}

.feature-description {
    font-size: 1rem;
    color: var(--gray-600);
    margin-bottom: var(--space-4);
    line-height: 1.7;
}

.feature-highlight {
    padding: var(--space-3) var(--space-4);
    background: var(--glass-white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--glass-border);
}

.highlight-text {
    font-size: 0.875rem;
    color: var(--sakura-primary);
    font-weight: 600;
}

/* Screenshots Section */
.screenshots-carousel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-8);
}

.screenshot-item {
    text-align: center;
}

.screenshot-img {
    width: 100%;
    max-width: 280px;
    height: auto;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    margin-bottom: var(--space-4);
    transition: var(--transition-medium);
}

.screenshot-img:hover {
    transform: scale(1.05);
}

.screenshot-caption h4 {
    font-size: 1.25rem;
    color: var(--gray-900);
    margin-bottom: var(--space-2);
}

.screenshot-caption p {
    color: var(--gray-600);
    margin-bottom: 0;
}

/* Download Section */
.download {
    background: var(--hero-gradient);
}

.download-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
}

@media (max-width: 1024px) {
    .download-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--space-12);
    }
}

.download-title {
    font-size: 3rem;
    margin-bottom: var(--space-6);
}

@media (max-width: 768px) {
    .download-title {
        font-size: 2rem;
    }
}

.download-description {
    font-size: 1.25rem;
    margin-bottom: var(--space-8);
    max-width: 500px;
}

.download-features {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.download-feature {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.feature-check {
    color: var(--sakura-primary);
    font-weight: 700;
    font-size: 1.25rem;
}

.download-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-6);
}

.store-badge {
    width: 200px;
    height: auto;
}

.qr-code {
    text-align: center;
}

.qr-img {
    width: 120px;
    height: 120px;
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-2);
}

.qr-text {
    font-size: 0.875rem;
    color: var(--gray-500);
    margin: 0;
}

/* Footer */
.footer {
    background: var(--gray-900);
    color: var(--white);
    padding: var(--space-16) 0 var(--space-8);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--space-16);
    margin-bottom: var(--space-12);
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }
}

.footer-brand {
    max-width: 300px;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--space-4);
}

.brand-tagline {
    color: var(--gray-400);
    margin: 0;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-8);
}

.link-title {
    font-size: 1.125rem;
    color: var(--white);
    margin-bottom: var(--space-4);
}

.footer-link {
    display: block;
    color: var(--gray-400);
    text-decoration: none;
    margin-bottom: var(--space-2);
    transition: var(--transition-fast);
}

.footer-link:hover {
    color: var(--sakura-secondary);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-8);
    border-top: 1px solid var(--gray-700);
}

@media (max-width: 768px) {
    .footer-bottom {
        flex-direction: column;
        gap: var(--space-4);
    }
}

.copyright {
    color: var(--gray-400);
    margin: 0;
}

.social-links {
    display: flex;
    gap: var(--space-4);
}

.social-link {
    color: var(--gray-400);
    transition: var(--transition-fast);
}

.social-link:hover {
    color: var(--sakura-secondary);
}

/* Responsive Design */
@media (max-width: 1200px) {
    .container {
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    :root {
        --space-16: 3rem;
        --space-20: 4rem;
        --space-24: 5rem;
    }
    
    .hero {
        padding: var(--space-20) 0 var(--space-12);
        min-height: auto;
    }
    
    section {
        padding: var(--space-12) 0;
    }
    
    .floating-card {
        transform: scale(0.8);
        padding: var(--space-3);
    }
    
    .floating-card.card-1 {
        top: 15%;
        right: -10%;
    }
    
    .floating-card.card-2 {
        bottom: 20%;
        left: -15%;
    }
    
    .sakura-petals .petal {
        font-size: 1.5rem;
        opacity: 0.4;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .sakura-petals {
        display: none;
    }
}

/* Demo Section */
.demo {
    padding: var(--space-20) 0;
    background: var(--bg-gradient);
    position: relative;
}

.demo-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.demo-phone {
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-frame {
    width: 300px;
    height: 600px;
    background: linear-gradient(145deg, #1d1d1f, #000000);
    border-radius: 50px;
    padding: 8px;
    box-shadow: 
        0 30px 60px rgba(0, 0, 0, 0.4),
        0 10px 20px rgba(0, 0, 0, 0.2),
        inset 0 1px 2px rgba(255, 255, 255, 0.1);
    position: relative;
    border: 2px solid #2d2d2f;
}

.phone-frame::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 30px;
    background: #000000;
    border-radius: 20px;
    z-index: 10;
}

.phone-frame::after {
    content: '';
    position: absolute;
    top: 28px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 6px;
    background: #333;
    border-radius: 3px;
    z-index: 11;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, 
        rgba(248, 187, 217, 0.08) 0%,
        rgba(255, 255, 255, 0.03) 50%,
        rgba(225, 179, 211, 0.08) 100%);
    border-radius: 42px;
    overflow: hidden;
    position: relative;
    backdrop-filter: blur(10px);
}

.demo-content {
    padding: var(--space-12) var(--space-6);
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.demo-card {
    width: 100%;
    max-width: 240px;
    padding: var(--space-6);
    border-radius: 20px;
    backdrop-filter: blur(30px);
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 
        0 20px 40px rgba(248, 187, 217, 0.15),
        0 8px 16px rgba(0, 0, 0, 0.1);
    animation: cardFloat 4s ease-in-out infinite;
}

@keyframes cardFloat {
    0%, 100% { transform: translateY(0px) scale(1); }
    50% { transform: translateY(-8px) scale(1.02); }
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-4);
}

.jlpt-badge {
    background: var(--sakura-primary);
    color: white;
    padding: var(--space-1) var(--space-3);
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.card-type {
    font-size: 11px;
    color: rgba(0, 0, 0, 0.6);
    font-weight: 500;
    background: rgba(255, 255, 255, 0.3);
    padding: var(--space-1) var(--space-2);
    border-radius: 8px;
}

.card-main {
    text-align: center;
    margin-bottom: var(--space-5);
}

.japanese-text {
    font-size: 2.5rem;
    font-weight: 600;
    color: #1d1d1f;
    margin-bottom: var(--space-2);
    line-height: 1.2;
}

.reading-text {
    font-size: 14px;
    color: rgba(0, 0, 0, 0.6);
    margin-bottom: var(--space-3);
    font-weight: 400;
}

.meaning-text {
    font-size: 16px;
    color: var(--sakura-primary);
    font-weight: 600;
}

.card-example {
    display: flex;
    align-items: flex-start;
    gap: var(--space-2);
    padding: var(--space-3);
    background: rgba(255, 255, 255, 0.4);
    border-radius: 12px;
    margin-bottom: var(--space-4);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.example-icon {
    display: flex;
    align-items: center;
    color: var(--sakura-primary);
    margin-top: 2px;
}

.example-text {
    font-size: 12px;
    color: rgba(0, 0, 0, 0.7);
    line-height: 1.4;
    flex: 1;
}

.card-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-2);
}

.action-btn {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-2) var(--space-3);
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.4);
    border-radius: 10px;
    font-size: 11px;
    color: rgba(0, 0, 0, 0.7);
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
}

.action-btn:hover {
    background: rgba(255, 255, 255, 0.7);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(248, 187, 217, 0.2);
}

.action-btn.favorite .btn-icon {
    color: var(--sakura-primary);
}

.action-btn.ai {
    background: rgba(248, 187, 217, 0.3);
    border-color: rgba(248, 187, 217, 0.4);
}

.demo-nav {
    margin-top: var(--space-8);
    text-align: center;
}

.nav-hint {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.7);
    padding: var(--space-2) var(--space-4);
    background: rgba(0, 0, 0, 0.2);
    border-radius: 20px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 200px;
    margin: 0 auto;
}

.demo-features {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
    padding-left: var(--space-4);
}

.demo-feature {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
}

.demo-feature .feature-icon {
    font-size: 1.5rem;
    margin-top: var(--space-1);
    color: var(--sakura-primary);
    background: rgba(248, 187, 217, 0.1);
    padding: var(--space-2);
    border-radius: 12px;
    border: 1px solid rgba(248, 187, 217, 0.2);
}

.demo-feature h4 {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: var(--space-2);
}

.demo-feature p {
    font-size: var(--text-base);
    color: var(--gray-600);
    line-height: 1.6;
}

/* Experience Section */
.experience {
    padding: var(--space-16) 0;
    background: var(--white);
}

.experience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-8);
}

.experience-card {
    padding: var(--space-8);
    text-align: center;
    border-radius: var(--radius-lg);
    backdrop-filter: blur(20px);
    background: var(--glass-white);
    border: 1px solid var(--glass-border);
    transition: all 0.3s ease;
}

.experience-card:hover {
    transform: translateY(-4px);
    background: var(--glass-white-strong);
    box-shadow: 0 20px 40px rgba(248, 187, 217, 0.2);
}

.experience-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-4);
    display: block;
}

.experience-card h3 {
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: var(--space-4);
}

.experience-card p {
    font-size: var(--text-base);
    color: var(--gray-600);
    line-height: 1.6;
}

/* Download Section Updates */
.download-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
    align-items: center;
}

.coming-soon-card {
    padding: var(--space-8);
    text-align: center;
    border-radius: var(--radius-lg);
    backdrop-filter: blur(20px);
    background: var(--glass-white);
    border: 1px solid var(--glass-border);
}

.coming-soon-icon {
    font-size: 3rem;
    margin-bottom: var(--space-4);
    display: block;
}

.coming-soon-card h3 {
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: var(--space-3);
}

.coming-soon-card p {
    font-size: var(--text-base);
    color: var(--gray-600);
    line-height: 1.6;
    margin-bottom: var(--space-6);
}

.notify-btn {
    display: inline-block;
    padding: var(--space-3) var(--space-6);
    background: var(--sakura-primary);
    color: white;
    border-radius: var(--radius-full);
    font-weight: 500;
    font-size: var(--text-sm);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .demo-container {
        grid-template-columns: 1fr;
        gap: var(--space-12);
        text-align: center;
    }
    
    .phone-frame {
        width: 260px;
        height: 520px;
    }
    
    .hero-visual .phone-frame {
        width: 260px;
        height: 520px;
    }
    
    .demo-card {
        max-width: 200px;
        padding: var(--space-5);
    }
    
    .japanese-text {
        font-size: 2rem;
    }
    
    .nav-hint {
        font-size: 10px;
        padding: var(--space-1) var(--space-3);
        max-width: 150px;
    }
    
    /* Hide AI button text on small screens */
    .action-btn.ai .btn-text {
        display: none;
    }
    
    .action-btn.ai {
        min-width: auto;
        padding: var(--space-2);
    }
    
    .demo-features {
        align-items: center;
        text-align: center;
        padding-left: 0;
    }
    
    .demo-feature {
        flex-direction: column;
        text-align: center;
        gap: var(--space-3);
        max-width: 300px;
    }
    
    .download-content {
        grid-template-columns: 1fr;
        gap: var(--space-8);
        text-align: center;
    }
    
    .experience-grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }
}

/* Icon Styles */
.logo-icon svg,
.badge-icon svg,
.btn-icon svg,
.btn-arrow svg {
    display: inline-block;
    vertical-align: middle;
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--sakura-primary);
}

.badge-icon {
    display: inline-flex;
    align-items: center;
    color: var(--sakura-primary);
}

.btn-icon {
    display: inline-flex;
    align-items: center;
}

.btn-arrow {
    display: inline-flex;
    align-items: center;
    transition: transform 0.2s ease;
}

.btn:hover .btn-arrow {
    transform: translateX(2px);
}

.feature-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-4);
    color: var(--sakura-primary);
}

.experience-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-4);
    color: var(--sakura-primary);
}

.coming-soon-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-4);
    color: var(--sakura-primary);
}

.example-icon {
    display: flex;
    align-items: center;
    color: var(--sakura-primary);
}

.action-btn .btn-icon {
    color: var(--gray-600);
}

.action-btn.favorite .btn-icon {
    color: var(--sakura-primary);
}

.action-btn:hover .btn-icon {
    color: var(--sakura-primary);
}

/* Focus states */
.btn:focus-visible,
.nav-link:focus-visible,
.footer-link:focus-visible {
    outline: 2px solid var(--sakura-primary);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .hero-bg,
    .floating-card,
    .navbar {
        display: none !important;
    }
    
    body {
        background: white !important;
    }
}