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

:root {
    /* Colors - Inspired by iOS design and travel themes */
    --primary-color: #007AFF;
    --primary-dark: #0051D5;
    --primary-light: #3395FF;
    --primary-lighter: #E5F2FF;
    --secondary-color: #5856D6;
    --secondary-dark: #3634A3;
    --secondary-light: #7C7AE0;
    --secondary-lighter: #EEEEF8;
    --accent-color: #FF9500;
    --accent-dark: #CC7700;
    --accent-light: #FFB040;
    --accent-lighter: #FFF4E5;
    --text-primary: #1D1D1F;
    --text-secondary: #86868B;
    --text-tertiary: #B3B3B8;
    --background: #FFFFFF;
    --surface: #F2F2F7;
    --surface-elevated: #FAFAFA;
    --border: #D1D1D6;
    --border-light: #E5E5EA;
    
    /* Typography - Refined with fluid scaling */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: clamp(1rem, 0.95rem + 0.25vw, 1.0625rem); /* 16px -> 17px */
    --font-size-lg: clamp(1.125rem, 1.05rem + 0.35vw, 1.25rem);
    --font-size-xl: clamp(1.25rem, 1.15rem + 0.5vw, 1.5rem);
    --font-size-2xl: clamp(1.5rem, 1.3rem + 1vw, 1.875rem);
    --font-size-3xl: clamp(1.875rem, 1.5rem + 1.5vw, 2.25rem);
    --font-size-4xl: clamp(2.25rem, 1.75rem + 2vw, 3rem);
    --font-size-5xl: clamp(2.5rem, 2rem + 2.5vw, 3.75rem);
    
    /* Spacing - 8px base grid with fluid scaling */
    --spacing-xs: 0.25rem; /* 4px */
    --spacing-sm: 0.5rem; /* 8px */
    --spacing-md: 1rem; /* 16px */
    --spacing-lg: clamp(1.5rem, 1.25rem + 1vw, 2rem); /* 24px -> 32px */
    --spacing-xl: clamp(2rem, 1.5rem + 2vw, 3rem); /* 32px -> 48px */
    --spacing-2xl: clamp(3rem, 2rem + 4vw, 5rem); /* 48px -> 80px */
    --spacing-3xl: clamp(4rem, 3rem + 5vw, 7.5rem); /* 64px -> 120px */
    
    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 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);
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
}

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

.nav-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
}

.logo {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    text-decoration: none;
    background: linear-gradient(90deg,
        #667eea 0%,      /* M - blue */
        #764ba2 25%,     /* i - purple */
        #F093FB 50%,     /* l - pink */
        #FF9500 75%      /* e - orange */
    );
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: var(--spacing-xl);
}

.nav-link {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    transition: color 0.2s ease;
}

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

.language-selector select {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--background);
    color: var(--text-primary);
    font-family: inherit;
}

/* Hero Section */
.hero {
    padding: calc(80px + var(--spacing-3xl)) 0 var(--spacing-3xl);
    background: linear-gradient(180deg, #FAFAFA 0%, #FFFFFF 100%);
    color: var(--text-primary);
    overflow: hidden;
    position: relative;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-2xl);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 800;
    margin-bottom: var(--spacing-lg);
    line-height: 1.1;
    letter-spacing: -0.02em;
    background: linear-gradient(120deg, #667eea 0%, #764ba2 30%, #F093FB 60%, #FF9500 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-2xl);
    color: var(--text-secondary);
    line-height: 1.6;
    max-width: 65ch;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-decoration: none;
    font-weight: 600;
    font-size: var(--font-size-lg);
    transition: all 0.2s ease;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #F093FB 100%);
    color: white;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 24px -10px rgba(102, 126, 234, 0.4);
    background: linear-gradient(135deg, #5568d3 0%, #634399 50%, #d77fe8 100%);
}

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

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

/* Float Animation */
@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-15px);
    }
}

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

/* Screenshot Carousel */
.screenshot-carousel {
    position: relative;
    width: 100%;
    max-width: 320px;
}

.carousel-container {
    position: relative;
    width: 100%;
    aspect-ratio: 1320 / 2868; /* iPhone screenshot ratio */
    border-radius: 32px;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.2);
    animation: float 6s ease-in-out infinite;
    transition: aspect-ratio 0.5s ease;
}

.carousel-container.wide-slide {
    aspect-ratio: 1080 / 1350; /* Mile Card 4:5 ratio */
}

.carousel-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 0.5s ease-in-out;
}

.carousel-slide[data-ratio="wide"] {
    object-fit: contain;
}

.carousel-slide.active {
    opacity: 1;
}

/* Carousel Navigation Dots */
.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 16px;
}

.carousel-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    border: none;
    background: var(--text-tertiary);
    cursor: pointer;
    padding: 0;
    transition: all 0.3s ease;
}

.carousel-dot:hover {
    background: var(--text-secondary);
    transform: scale(1.2);
}

.carousel-dot.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    width: 24px;
    border-radius: 4px;
}

/* Legacy support for single screenshot (fallback) */
.hero-screenshot {
    width: 100%;
    max-width: 320px;
    height: auto;
    object-fit: contain;
    border-radius: 32px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.2);
    transition: opacity 0.3s ease-in-out;
    animation: float 6s ease-in-out infinite;
}

/* Sections */
.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    text-align: center;
    margin-bottom: clamp(2.5rem, 2rem + 2vw, 4rem);
    padding-bottom: var(--spacing-md);
    color: var(--text-primary);
    letter-spacing: -0.015em;
    line-height: 1.2;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2, #F093FB, #FF9500);
    border-radius: 2px;
}

/* Features Section */
.features {
    padding: var(--spacing-3xl) 0;
    background: var(--surface);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: clamp(1.5rem, 1rem + 2vw, 2.5rem);
}

.feature-card {
    background: white;
    padding: clamp(2rem, 1.5rem + 2vw, 3rem);
    border-radius: var(--radius-xl);
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1), border-color 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-lighter);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
    filter: grayscale(0%) brightness(1.1);
}

/* Individual colorful feature icons */
.feature-card:nth-child(1) .feature-icon {
    background: linear-gradient(135deg, #FF6B6B, #FF8E53);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.feature-card:nth-child(2) .feature-icon {
    background: linear-gradient(135deg, #4ECDC4, #44A08D);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.feature-card:nth-child(3) .feature-icon {
    background: linear-gradient(135deg, #F093FB, #F5576C);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.feature-card:nth-child(4) .feature-icon {
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.feature-card:nth-child(5) .feature-icon {
    background: linear-gradient(135deg, #FA8BFF, #2BD2FF);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.feature-card:nth-child(6) .feature-icon {
    background: linear-gradient(135deg, #FFD26F, #3677FF);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.feature-title {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.feature-description {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* How It Works Section */
.how-it-works {
    padding: var(--spacing-3xl) 0;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: clamp(2rem, 1.5rem + 2vw, 3rem);
}

.step {
    text-align: center;
}

.step-number {
    width: 72px;
    height: 72px;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-2xl);
    font-weight: 800;
    margin: 0 auto var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

/* Individual colorful step numbers */
.step:nth-child(1) .step-number {
    background: linear-gradient(135deg, #FF6B6B, #FF8E53);
}

.step:nth-child(2) .step-number {
    background: linear-gradient(135deg, #4ECDC4, #44A08D);
}

.step:nth-child(3) .step-number {
    background: linear-gradient(135deg, #667eea, #764ba2);
}

.step:hover .step-number {
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.step-title {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.step-description {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Download Section */
.download {
    padding: var(--spacing-3xl) 0;
    background: var(--surface);
}

.download-content {
    text-align: center;
}

.download-subtitle {
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.download-buttons {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
}

.download-note {
    font-size: var(--font-size-sm);
    color: var(--text-tertiary);
    text-align: center;
}

.download-btn img {
    height: 60px;
    transition: transform 0.2s ease;
}

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

.coming-soon {
    position: relative;
    opacity: 0.5;
}

.coming-soon img {
    height: 60px;
    filter: grayscale(100%);
}

.coming-soon-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 600;
}

/* Footer */
.footer {
    background: var(--text-primary);
    color: white;
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

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

.footer-brand h3 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(90deg,
        #667eea 0%,      /* M - blue */
        #764ba2 25%,     /* i - purple */
        #F093FB 50%,     /* l - pink */
        #FF9500 75%      /* e - orange */
    );
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.footer-social a {
    font-size: var(--font-size-xl);
    text-decoration: none;
    transition: transform 0.2s ease, opacity 0.2s ease;
    opacity: 0.8;
}

.footer-social a:hover {
    transform: translateY(-3px);
    opacity: 1;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-xl);
}

.footer-section h4 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
    color: white;
}

.footer-section a {
    display: block;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    margin-bottom: var(--spacing-sm);
    transition: color 0.2s ease;
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .nav-links {
        gap: var(--spacing-lg);
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-title {
        font-size: var(--font-size-4xl);
    }
    
    .hero-cta {
        justify-content: center;
    }

    .hero-screenshot {
        max-width: 280px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .steps-grid {
        grid-template-columns: 1fr;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .hero {
        padding: calc(80px + var(--spacing-2xl)) var(--spacing-md) var(--spacing-2xl);
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .section-title {
        font-size: var(--font-size-3xl);
    }
    
    .btn {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: var(--font-size-base);
    }
}

/* Animation and Interactions */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* Staggered animations for feature cards */
.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.2s; }
.feature-card:nth-child(3) { animation-delay: 0.3s; }
.feature-card:nth-child(4) { animation-delay: 0.4s; }
.feature-card:nth-child(5) { animation-delay: 0.5s; }
.feature-card:nth-child(6) { animation-delay: 0.6s; }

.feature-card,
.step,
.download-content {
    animation: fadeInUp 0.6s cubic-bezier(0.4, 0, 0.2, 1) backwards;
}

/* Hero content fade in */
.hero-title {
    animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.2s backwards;
}

.hero-subtitle {
    animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.4s backwards;
}

.hero-cta {
    animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.6s backwards;
}

/* Respect reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .hero-screenshot {
        animation: none !important;
    }

    .hero {
        animation: none !important;
    }
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
}

/* Focus styles for accessibility */
.btn:focus,
.nav-link:focus,
select:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}