/* Root Variables */
:root {
    --color-coral: #FF6B5B;
    --color-coral-dark: #FF5747;
    --color-text-primary: #1A1A1A;
    --color-text-secondary: #666666;
    --color-bg-light: #FAFAFA;
    --color-bg-white: #FFFFFF;
    --color-border: #E8E8E8;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --font-size-base: 16px;
    --font-size-large: 18px;
    --font-size-xl: 28px;
    --font-size-2xl: 36px;
    --font-size-3xl: 48px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --max-width: 1200px;
}

/* Global Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--color-bg-white);
    color: var(--color-text-primary);
    line-height: 1.6;
    font-size: var(--font-size-base);
}

.container {
    width: min(100% - 2rem, var(--max-width));
    margin-inline: auto;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

/* Typography */
h1 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h2 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
}

h3 {
    font-size: var(--font-size-large);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-secondary);
}

/* Navbar */
.navbar {
    position: sticky;
    top: 0;
    z-index: 50;
    background: var(--color-text-primary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.10);
    backdrop-filter: blur(8px);
}

.navbar-inner {
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    text-decoration: none;
}

.navbar-icon {
    border-radius: 7px;
    flex-shrink: 0;
}

.navbar-name {
    font-size: 1.05rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: -0.01em;
}

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

.navbar-links a {
    color: rgba(255, 255, 255, 0.78);
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
    padding: 0.3rem 0.6rem;
    border-radius: 6px;
}

.navbar-links a:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.10);
}

.navbar-links .navbar-cta {
    background: var(--color-coral);
    color: #fff;
    font-weight: 700;
    padding: 0.4rem 1rem;
    border-radius: 999px;
    border: 2px solid transparent;
    transition: var(--transition);
}

.navbar-links .navbar-cta:hover {
    background: var(--color-coral-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(255, 107, 91, 0.4);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #FF6B5B 0%, #FF8A7D 100%);
    color: white;
    padding: var(--spacing-2xl) var(--spacing-lg);
    min-height: calc(88vh - 60px);
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-content {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.hero-text {
    z-index: 10;
}

.hero-text h1 {
    color: white;
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    color: rgba(255, 255, 255, 0.95);
    font-size: var(--font-size-large);
    margin-bottom: var(--spacing-lg);
    font-weight: 400;
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: 12px;
    font-weight: 600;
    font-size: var(--font-size-base);
    transition: var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background-color: rgba(255, 255, 255, 0.9);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.btn-label {
    font-weight: 700;
}

.hero-image {
    text-align: center;
    animation: float 3s ease-in-out infinite;
}

.hero-image img {
    width: min(100%, 380px);
    margin-inline: auto;
    border-radius: 24px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
}

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

/* Value Strip */
.value-strip {
    background-color: var(--color-bg-light);
    padding: var(--spacing-2xl) var(--spacing-lg);
}

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

.value-item {
    text-align: center;
    padding: var(--spacing-lg);
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: 16px;
}

.value-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: var(--spacing-md);
}

.value-item p {
    color: var(--color-text-primary);
    font-size: var(--font-size-base);
}

.value-item strong {
    color: var(--color-coral);
}

/* Features Section */
.features-section {
    padding: var(--spacing-2xl) var(--spacing-lg);
}

.pro-section {
    background-color: white;
}

.feature-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
    padding: clamp(1rem, 2vw, 2rem);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    background: #fff;
}

.feature-text h2 {
    color: var(--color-text-primary);
}

.feature-text p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-secondary);
}

.feature-highlight {
    color: var(--color-coral);
    font-weight: 600;
    padding: var(--spacing-md);
    background-color: rgba(255, 107, 91, 0.05);
    border-left: 3px solid var(--color-coral);
    border-radius: 4px;
}

.feature-image img {
    width: min(100%, 320px);
    margin-inline: auto;
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

/* Lifestyle Section */
.lifestyle-section {
    background-color: var(--color-bg-light);
    padding: var(--spacing-2xl) var(--spacing-lg);
}

.lifestyle-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
    padding: clamp(1rem, 2vw, 2rem);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    background: #fff;
}

.lifestyle-image img {
    width: min(100%, 320px);
    margin-inline: auto;
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.lifestyle-text h2 {
    color: var(--color-text-primary);
}

.feature-sub {
    color: var(--color-text-secondary);
    font-style: italic;
}

/* Core Features Grid */
.core-features {
    background-color: white;
    padding: var(--spacing-2xl) var(--spacing-lg);
}

.core-features h2 {
    margin: 0 auto var(--spacing-2xl);
    text-align: center;
}

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

.feature-card {
    background-color: var(--color-bg-light);
    padding: var(--spacing-lg);
    border-radius: 12px;
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.feature-card:hover {
    border-color: var(--color-coral);
    box-shadow: 0 4px 12px rgba(255, 107, 91, 0.1);
    transform: translateY(-4px);
}

.feature-card h3 {
    color: var(--color-text-primary);
}

.feature-card p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

/* Compatibility Section */
.compatibility {
    background-color: var(--color-bg-light);
    padding: var(--spacing-xl) var(--spacing-lg);
    text-align: center;
}

.compatibility h3 {
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
}

.compatibility-list {
    margin: 0 auto;
    color: var(--color-text-secondary);
}

/* Footer */
.footer {
    background-color: var(--color-text-primary);
    color: white;
    padding: var(--spacing-2xl) var(--spacing-lg) var(--spacing-lg);
}

.footer-content {
    max-width: var(--max-width);
    margin: 0 auto;
}

.footer-top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--spacing-2xl);
    flex-wrap: wrap;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-icon {
    border-radius: 14px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.footer-app-name {
    font-size: 1.15rem;
    font-weight: 700;
    color: #fff;
}

.footer-tagline {
    color: rgba(255, 255, 255, 0.55);
    font-size: 0.875rem;
    margin: 0;
    max-width: 220px;
}

.footer-cols {
    display: flex;
    gap: var(--spacing-2xl);
    flex-wrap: wrap;
}

.footer-col {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    min-width: 130px;
}

.footer-col h4 {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: rgba(255, 255, 255, 0.45);
    margin-bottom: 0.25rem;
}

.footer-col a {
    color: rgba(255, 255, 255, 0.75);
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-col a:hover {
    color: #fff;
}

.footer-divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.10);
    margin: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-legal {
    text-align: center;
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.45);
}

.footer-legal a {
    color: rgba(255, 255, 255, 0.65);
    text-decoration: underline;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --font-size-2xl: 28px;
        --font-size-3xl: 32px;
        --spacing-2xl: 2rem;
    }

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

    .navbar-links a:not(.navbar-cta) {
        display: none;
    }

    .hero-text h1 {
        font-size: var(--font-size-2xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-base);
    }

    .cta-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .feature-row {
        grid-template-columns: 1fr;
    }

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

    .lifestyle-content .lifestyle-image {
        order: -1;
    }

    .value-items {
        grid-template-columns: 1fr;
    }

    .footer-top {
        flex-direction: column;
        gap: var(--spacing-lg);
    }

    .footer-cols {
        gap: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    :root {
        --font-size-xl: 24px;
        --font-size-2xl: 24px;
        --font-size-3xl: 28px;
        --spacing-lg: 1.5rem;
        --spacing-xl: 2rem;
        --spacing-2xl: 1.5rem;
    }

    h1 {
        font-size: var(--font-size-3xl);
    }

    .hero {
        padding: var(--spacing-lg);
        min-height: auto;
    }

    .hero-text h1 {
        font-size: var(--font-size-3xl);
    }

    .cta-buttons {
        gap: var(--spacing-sm);
    }

    .btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.9rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

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

    section {
        padding: var(--spacing-lg);
    }
}

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

/* Focus Styles */
.btn:focus-visible,
.navbar-links a:focus-visible,
.footer-col a:focus-visible {
    outline: 2px solid var(--color-coral);
    outline-offset: 2px;
}