/* YAYR Landing Page - Styles */
/* Brand Colors: Teal #1CC8BD (Primary), Mustard #F2B807 (Secondary), Coral #FF6F5E (Semantic) */

/* Design Tokens */
:root {
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 20px;
    --spacing-2xl: 24px;
    --spacing-3xl: 32px;
    --spacing-4xl: 48px;
    --spacing-5xl: 64px;
    --spacing-6xl: 96px;

    /* Border Radius */
    --border-radius-small: 8px;
    --border-radius-medium: 12px;
    --border-radius-large: 16px;
    --border-radius-circle: 50%;

    /* YAYR Brand Colors */
    --color-primary: #1CC8BD;        /* Teal - connection, achievement */
    --color-primary-dark: #0FA89A;   /* Darker teal */
    --color-primary-light: #4DD4C8;  /* Lighter teal */
    --color-secondary: #F2B807;      /* Mustard - celebration, joy */
    --color-secondary-dark: #D9A306; /* Darker mustard */
    --color-semantic: #FF6F5E;      /* Coral - error only */
    --color-neutral-ink: #1A1A1A;    /* Ink - dark text */
    --color-neutral-off-white: #FAFAF7; /* Off-white - light bg */
    
    /* Text Colors */
    --color-text-primary: #1A1A1A;
    --color-text-secondary: #6C757D;
    --color-text-light: #FFFFFF;
    --color-text-muted: #92A492;
    
    /* Background Colors */
    --color-bg-light: #FAFAF7;
    --color-bg-white: #FFFFFF;
    --color-bg-dark: #111314;
    
    /* Border Colors */
    --color-border: #E7E7E7;
    --color-border-light: #F0F0F0;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;
    --font-size-2xl: 32px;
    --font-size-3xl: 48px;
    --font-size-4xl: 64px;
    
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    --line-height-tight: 1.2;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(26, 26, 26, 0.08);
    --shadow-md: 0 4px 8px rgba(26, 26, 26, 0.12);
    --shadow-lg: 0 8px 16px rgba(26, 26, 26, 0.15);
    --shadow-xl: 0 12px 24px rgba(26, 26, 26, 0.2);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 200ms ease;
    --transition-slow: 300ms ease;
    
    /* Touch Targets */
    --touch-target-min: 44px;
    --touch-target-pref: 48px;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--color-text-primary);
    background-color: var(--color-neutral-ink);
}

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

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-2xl);
    }
}

/* Header */
.header {
    background-color: var(--color-neutral-ink);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--spacing-lg) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    transition: all var(--transition-normal);
}

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

.logo-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    text-decoration: none;
    color: var(--color-text-light);
    transition: opacity var(--transition-fast);
}

.logo-link:hover {
    opacity: 0.8;
}

.logo-link:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
    border-radius: var(--border-radius-small);
}

.logo {
    width: 40px;
    height: 40px;
    display: block;
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    letter-spacing: -0.5px;
}

.nav {
    display: flex;
    gap: var(--spacing-2xl);
    align-items: center;
}

.nav-link {
    color: var(--color-text-light);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
    padding: var(--spacing-sm) 0;
    min-height: var(--touch-target-min);
    display: flex;
    align-items: center;
}

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

.nav-link:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
    border-radius: var(--border-radius-small);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-text-light);
    padding: var(--spacing-6xl) 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 50%, rgba(242, 184, 7, 0.15) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-4xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

@media (min-width: 768px) {
    .hero-content {
        grid-template-columns: 1fr 1fr;
    }
}

.hero-text {
    text-align: center;
}

@media (min-width: 768px) {
    .hero-text {
        text-align: left;
    }
}

.hero-title {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    margin-bottom: var(--spacing-lg);
    letter-spacing: -1px;
}

@media (min-width: 768px) {
    .hero-title {
        font-size: var(--font-size-4xl);
    }
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-md);
    opacity: 0.95;
}

.highlight {
    color: var(--color-secondary);
    font-weight: var(--font-weight-semibold);
}

.hero-description {
    font-size: var(--font-size-lg);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-3xl);
    opacity: 0.9;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

@media (min-width: 768px) {
    .hero-description {
        margin-left: 0;
        margin-right: 0;
    }
}

.hero-cta {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: center;
}

@media (min-width: 768px) {
    .hero-cta {
        flex-direction: row;
        align-items: flex-start;
    }
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    min-height: 300px;
}

.celebration-burst {
    position: relative;
    width: 200px;
    height: 200px;
}

.burst-circle {
    position: absolute;
    border-radius: var(--border-radius-circle);
    animation: pulse 2s ease-in-out infinite;
}

.burst-1 {
    width: 120px;
    height: 120px;
    background: var(--color-secondary);
    opacity: 0.3;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 0s;
}

.burst-2 {
    width: 160px;
    height: 160px;
    background: var(--color-primary-light);
    opacity: 0.2;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 0.5s;
}

.burst-3 {
    width: 200px;
    height: 200px;
    background: var(--color-secondary);
    opacity: 0.15;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 1s;
}

@keyframes pulse {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.3;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.1);
        opacity: 0.2;
    }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-2xl);
    border-radius: var(--border-radius-medium);
    text-decoration: none;
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-base);
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
    min-height: var(--touch-target-min);
    gap: var(--spacing-sm);
}

.btn:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
    background-color: var(--color-text-light);
    color: var(--color-primary);
}

/* Sections */
section {
    padding: var(--spacing-5xl) 0;
}

.section-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-md);
    text-align: center;
    color: var(--color-text-primary);
}

@media (min-width: 768px) {
    .section-title {
        font-size: var(--font-size-3xl);
    }
}

.section-intro {
    font-size: var(--font-size-lg);
    line-height: var(--line-height-relaxed);
    color: var(--color-text-secondary);
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-4xl);
}

/* Features Section */
.features {
    background-color: var(--color-bg-light);
}

.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-3xl);
}

@media (min-width: 768px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.feature-card {
    background-color: var(--color-bg-white);
    border-radius: var(--border-radius-large);
    padding: var(--spacing-3xl);
    transition: all var(--transition-normal);
    border: 1px solid var(--color-border-light);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.feature-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    border-radius: var(--border-radius-medium);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-light);
}

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

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

/* How It Works Section */
.how-it-works {
    background-color: var(--color-bg-white);
}

.steps {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-4xl);
    max-width: 800px;
    margin: 0 auto;
}

.step {
    display: flex;
    gap: var(--spacing-2xl);
    align-items: flex-start;
}

.step-number {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-text-light);
    border-radius: var(--border-radius-circle);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    flex-shrink: 0;
}

.step-content {
    flex: 1;
}

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

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

/* Download Section */
.download {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-text-light);
    text-align: center;
}

.download-content {
    max-width: 600px;
    margin: 0 auto;
}

.download-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-md);
}

@media (min-width: 768px) {
    .download-title {
        font-size: var(--font-size-3xl);
    }
}

.download-subtitle {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-4xl);
    opacity: 0.95;
}

.download-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: center;
    margin-bottom: var(--spacing-2xl);
}

@media (min-width: 768px) {
    .download-buttons {
        flex-direction: row;
        justify-content: center;
    }
}

.btn-download {
    background-color: var(--color-bg-white);
    color: var(--color-text-primary);
    padding: var(--spacing-md) var(--spacing-xl);
    min-width: 200px;
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.download-label {
    display: block;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-regular);
    line-height: 1.2;
}

.download-store {
    display: block;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    line-height: 1.2;
}

.download-note {
    font-size: var(--font-size-sm);
    opacity: 0.9;
    margin-top: var(--spacing-lg);
}

/* Footer */
.footer {
    background-color: var(--color-neutral-ink);
    color: var(--color-text-light);
    padding: var(--spacing-4xl) 0 var(--spacing-2xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-3xl);
    text-align: center;
}

@media (min-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr 1fr;
        align-items: center;
        text-align: left;
    }
}

.footer-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

@media (min-width: 768px) {
    .footer-brand {
        align-items: flex-start;
    }
}

.footer-logo {
    width: 48px;
    height: 48px;
    opacity: 0.9;
}

.footer-tagline {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
    opacity: 0.9;
}

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

@media (min-width: 768px) {
    .footer-links {
        flex-direction: row;
        justify-content: flex-end;
    }
}

.footer-link {
    color: var(--color-text-light);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    transition: color var(--transition-fast);
    padding: var(--spacing-sm) 0;
    min-height: var(--touch-target-min);
    display: flex;
    align-items: center;
}

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

.footer-link:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
    border-radius: var(--border-radius-small);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-2xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    font-size: var(--font-size-sm);
    opacity: 0.7;
}

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

/* Focus visible for keyboard navigation */
*:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Responsive adjustments */
@media (max-width: 767px) {
    .hero {
        padding: var(--spacing-4xl) 0;
    }
    
    .hero-title {
        font-size: var(--font-size-2xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-lg);
    }
    
    section {
        padding: var(--spacing-3xl) 0;
    }
    
    .nav {
        gap: var(--spacing-lg);
    }
    
    .nav-link {
        font-size: var(--font-size-xs);
    }
}