/* ============================================
   CSS Custom Properties & Root Variables
   ============================================ */
:root {
    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 18px;
    --spacing-lg: 24px;
    --spacing-xl: 48px;
    --spacing-xxl: 80px;
    
    /* Border Radius */
    --border-radius: 18px;
    --border-radius-sm: 12px;
    
    /* Colors */
    --bg-base: #000000;
    --bg-overlay: rgba(0, 0, 0, 0.3);
    --text-primary: #FFFFFF;
    --text-secondary: rgba(255, 255, 255, 0.85);
    --accent-red: rgb(255, 26, 26);
    --rim-light-red: rgb(255, 97, 97);
    --border-divider: rgba(255, 255, 255, 0.1);
    
    /* Layout */
    --max-content-width: 1200px;
    --section-spacing: 80px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", system-ui, sans-serif;
    font-weight: 400;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-base);
    overflow-x: hidden;
    position: relative;
}

/* ============================================
   Animated Background
   ============================================ */
.animated-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.background-gradient {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: 
        radial-gradient(
            ellipse 80% 50% at 20% 30%,
            rgba(255, 26, 26, 0.12) 0%,
            transparent 50%
        ),
        radial-gradient(
            ellipse 60% 40% at 80% 70%,
            rgba(255, 26, 26, 0.08) 0%,
            transparent 50%
        ),
        radial-gradient(
            ellipse 100% 60% at 50% 50%,
            rgba(255, 26, 26, 0.05) 0%,
            rgba(0, 0, 0, 0.98) 60%,
            rgba(0, 0, 0, 1) 100%
        );
    animation: gradientShift 25s ease-in-out infinite;
    transform-origin: center center;
}

@keyframes gradientShift {
    0%, 100% {
        transform: translate(0%, 0%) scale(1) rotate(0deg);
    }
    20% {
        transform: translate(-8%, -6%) scale(1.15) rotate(3deg);
    }
    40% {
        transform: translate(6%, 8%) scale(1.1) rotate(-3deg);
    }
    60% {
        transform: translate(-4%, 4%) scale(1.12) rotate(2deg);
    }
    80% {
        transform: translate(7%, -5%) scale(1.08) rotate(-2deg);
    }
}

.background-noise {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.15 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
    background-size: 300px 300px;
    opacity: 0.25;
    pointer-events: none;
    animation: noiseMove 0.15s steps(8) infinite;
    mix-blend-mode: overlay;
}

@keyframes noiseMove {
    0% {
        transform: translate(0, 0);
    }
    10% {
        transform: translate(-5%, -5%);
    }
    20% {
        transform: translate(-10%, 5%);
    }
    30% {
        transform: translate(5%, -10%);
    }
    40% {
        transform: translate(-5%, 15%);
    }
    50% {
        transform: translate(-10%, 5%);
    }
    60% {
        transform: translate(15%, 0);
    }
    70% {
        transform: translate(0, 10%);
    }
    80% {
        transform: translate(-15%, 0);
    }
    90% {
        transform: translate(10%, -5%);
    }
    100% {
        transform: translate(5%, 0);
    }
}

/* Ensure content is above background */
body > *:not(.animated-background) {
    position: relative;
    z-index: 1;
}

/* ============================================
   Container & Layout
   ============================================ */
.container {
    max-width: var(--max-content-width);
    margin: 0 auto;
    padding: var(--spacing-lg);
}

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

/* ============================================
   Typography
   ============================================ */
h1, h2, h3 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 600;
}

p {
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
    text-wrap: balance;
}

a {
    color: var(--accent-red);
    text-decoration: none;
    transition: opacity 0.3s ease-in-out;
}

a:hover {
    opacity: 0.8;
}

/* ============================================
   Frosted Glass Effect
   ============================================ */
.frosted-glass {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    position: relative;
    border-radius: var(--border-radius);
}

.frosted-glass::after {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--bg-overlay);
    border-radius: var(--border-radius);
    pointer-events: none;
    z-index: 0;
}

.frosted-glass > * {
    position: relative;
    z-index: 1;
}

/* ============================================
   Rim Lighting Effect
   ============================================ */
.rim-light-border {
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    background: conic-gradient(
        from 0deg,
        transparent 0deg,
        rgba(255, 97, 97, 0) 6%,
        rgba(255, 97, 97, 0.85) 14%,
        rgba(255, 97, 97, 0) 22%,
        transparent 50%,
        rgba(255, 97, 97, 0) 56%,
        rgba(255, 97, 97, 0.65) 64%,
        rgba(255, 97, 97, 0) 72%,
        transparent 100%
    );
    animation: rimRotate 2.4s linear infinite;
    box-shadow: 
        0 0 18px rgba(255, 97, 97, 0.95),
        0 0 36px rgba(255, 97, 97, 0.55);
    position: relative;
}

@keyframes rimRotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* ============================================
   Red Glow Effects
   ============================================ */
.glow-pulse {
    box-shadow: 
        0 0 8px rgba(255, 26, 26, 0.35),
        0 0 14px rgba(255, 26, 26, 0.20);
    animation: glowPulse 2.2s ease-in-out infinite;
}

@keyframes glowPulse {
    0%, 100% {
        box-shadow: 
            0 0 8px rgba(255, 26, 26, 0.35),
            0 0 14px rgba(255, 26, 26, 0.20);
    }
    50% {
        box-shadow: 
            0 0 18px rgba(255, 26, 26, 0.95),
            0 0 36px rgba(255, 26, 26, 0.55);
    }
}

/* ============================================
   Header
   ============================================ */
.header {
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.app-logo {
    width: clamp(80px, 12vw, 120px);
    height: auto;
    margin: 0 auto var(--spacing-lg);
    display: block;
    transition: transform 0.3s ease-in-out;
}

.app-logo:hover {
    transform: scale(1.05);
}

.header-link {
    display: block;
    text-decoration: none;
}

.app-title {
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    font-size: clamp(3rem, 6vw, 5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
}

.tagline {
    color: var(--text-secondary);
    font-size: clamp(1.1rem, 2vw, 1.5rem);
    margin-bottom: 0;
    text-wrap: balance;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    padding: 0;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.hero-image {
    width: 100%;
    max-width: 536px;
    height: auto;
    margin: 0 auto var(--spacing-xl);
    display: block;
    border-radius: var(--border-radius);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.hero-description {
    color: var(--text-secondary);
    font-size: clamp(1rem, 1.5vw, 1.25rem);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
    text-wrap: balance;
}

.hero-description:last-child {
    margin-bottom: var(--spacing-xl);
}

.hero-button {
    margin-top: var(--spacing-lg);
    display: inline-block;
}

/* ============================================
   Features Section
   ============================================ */
.features {
    padding: var(--spacing-xxl) 0;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--text-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0;
}

/* Bento box layout - boxes touch with no gaps */
@media (min-width: 768px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* Image cards span 2 columns on tablet */
    .feature-card-image {
        grid-column: span 2;
    }
}

@media (min-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    /* Image cards span 2 columns on desktop for bento box effect */
    .feature-card-image {
        grid-column: span 2;
    }
}

/* ============================================
   Feature Cards
   ============================================ */
.feature-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--accent-red);
    border-radius: 0;
    padding: var(--spacing-lg);
    position: relative;
    transition: all 0.3s ease-in-out;
    box-shadow: 
        0 0 8px rgba(255, 26, 26, 0.35),
        0 0 14px rgba(255, 26, 26, 0.20);
}

/* Add border radius only to outer corners for bento box effect */
@media (max-width: 767px) {
    .features-grid > .feature-card:first-child {
        border-top-left-radius: var(--border-radius);
        border-top-right-radius: var(--border-radius);
    }
    
    .features-grid > .feature-card:last-child {
        border-bottom-left-radius: var(--border-radius);
        border-bottom-right-radius: var(--border-radius);
    }
}

@media (min-width: 768px) and (max-width: 1023px) {
    .features-grid > .feature-card:nth-child(1) {
        border-top-left-radius: var(--border-radius);
    }
    
    .features-grid > .feature-card:nth-child(2) {
        border-top-right-radius: var(--border-radius);
    }
    
    .features-grid > .feature-card:nth-last-child(2) {
        border-bottom-left-radius: var(--border-radius);
    }
    
    .features-grid > .feature-card:last-child {
        border-bottom-right-radius: var(--border-radius);
    }
}

@media (min-width: 1024px) {
    /* 3-column bento box layout */
    .features-grid > .feature-card:nth-child(1) {
        border-top-left-radius: var(--border-radius);
    }
    
    .features-grid > .feature-card:nth-child(2) {
        border-top-right-radius: var(--border-radius);
    }
    
    .features-grid > .feature-card:nth-last-child(2) {
        border-bottom-left-radius: var(--border-radius);
    }
    
    .features-grid > .feature-card:last-child {
        border-bottom-right-radius: var(--border-radius);
    }
}

.feature-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--bg-overlay);
    border-radius: inherit;
    pointer-events: none;
    z-index: 0;
}

.feature-card > * {
    position: relative;
    z-index: 1;
}

.feature-card:hover {
    box-shadow: 
        0 0 18px rgba(255, 26, 26, 0.95),
        0 0 36px rgba(255, 26, 26, 0.55);
    transform: translateY(-2px);
}

.feature-title {
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    margin-top: 0;
}

.feature-card:has(.feature-image) .feature-title {
    margin-top: var(--spacing-md);
}

.feature-description {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 0;
    text-wrap: balance;
}

/* ============================================
   Feature Images
   ============================================ */
.feature-image {
    width: 100%;
    height: auto;
    border-radius: 12px;
    object-fit: cover;
    border: 1px solid var(--border-divider);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease-in-out, box-shadow 0.3s ease-in-out;
    display: block;
    margin-bottom: var(--spacing-md);
    margin-top: 0;
}

.feature-image:hover {
    transform: scale(1.02);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

/* ============================================
   Technical Details Section
   ============================================ */
.technical-details {
    padding: var(--spacing-xxl) 0;
}

.technical-content {
    max-width: 800px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--accent-red);
    border-radius: var(--border-radius);
    padding: var(--spacing-xl);
    position: relative;
    box-shadow: 
        0 0 8px rgba(255, 26, 26, 0.35),
        0 0 14px rgba(255, 26, 26, 0.20);
}

.technical-content::after {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--bg-overlay);
    border-radius: var(--border-radius);
    pointer-events: none;
    z-index: 0;
}

.technical-content > * {
    position: relative;
    z-index: 1;
}

.technical-item {
    display: flex;
    flex-direction: column;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border-divider);
}

.technical-item:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

@media (min-width: 768px) {
    .technical-item {
        flex-direction: row;
        align-items: baseline;
    }
}

.technical-label {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    min-width: 180px;
}

@media (min-width: 768px) {
    .technical-label {
        margin-bottom: 0;
        margin-right: var(--spacing-md);
    }
}

.technical-value {
    font-family: "SF Mono", "Monaco", "Menlo", monospace;
    color: var(--text-secondary);
    font-size: 0.95em;
}

/* ============================================
   Call-to-Action Section
   ============================================ */
.cta {
    padding: var(--spacing-xxl) 0;
    text-align: center;
}

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

.cta-subtitle {
    color: var(--text-secondary);
    font-size: clamp(1rem, 1.5vw, 1.25rem);
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ============================================
   Mac App Store Button
   ============================================ */
.app-store-button {
    display: inline-block;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--accent-red);
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    min-height: 44px;
    position: relative;
    transition: all 0.3s ease-in-out;
    box-shadow: 
        0 0 8px rgba(255, 26, 26, 0.35),
        0 0 14px rgba(255, 26, 26, 0.20);
    text-align: center;
}

.app-store-button::after {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--bg-overlay);
    border-radius: var(--border-radius-sm);
    pointer-events: none;
    z-index: 0;
}

.app-store-button > * {
    position: relative;
    z-index: 1;
}

.app-store-button:hover {
    box-shadow: 
        0 0 18px rgba(255, 26, 26, 0.95),
        0 0 36px rgba(255, 26, 26, 0.55);
    transform: translateY(-2px);
}

.app-store-button:active {
    transform: scale(0.98) translateY(0);
}

.app-store-button-text {
    color: var(--text-primary);
    font-weight: 600;
    font-size: clamp(1rem, 1.2vw, 1.1rem);
    display: block;
}

/* ============================================
   Mac App Store Badge
   ============================================ */
.app-store-badge {
    display: inline-block;
    transition: transform 0.3s ease-in-out, opacity 0.3s ease-in-out;
}

.app-store-badge:hover {
    transform: translateY(-2px);
    opacity: 0.9;
}

.app-store-badge:active {
    transform: scale(0.98) translateY(0);
}

.app-store-badge-image {
    height: 60px;
    width: auto;
    display: block;
}

@media (min-width: 768px) {
    .app-store-badge-image {
        height: 75px;
    }
}

/* ============================================
   Footer
   ============================================ */
.footer {
    padding: var(--spacing-xl) 0;
    text-align: center;
    border-top: 1px solid var(--border-divider);
    margin-top: var(--spacing-xxl);
}

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

.footer-link a {
    color: rgba(255, 255, 255, 0.5);
    font-weight: 500;
}

.footer-link a:hover {
    color: rgba(255, 255, 255, 0.7);
}

/* ============================================
   Responsive Adjustments
   ============================================ */
@media (max-width: 767px) {
    .container {
        padding: var(--spacing-lg);
    }
    
    .hero,
    .features,
    .technical-details,
    .cta {
        padding: var(--spacing-xl) 0;
    }
    
    .feature-card {
        padding: var(--spacing-md);
    }
    
    .technical-content {
        padding: var(--spacing-lg);
    }
}

/* ============================================
   Privacy & Support Pages
   ============================================ */
.privacy-content,
.support-content {
    max-width: 800px;
    margin: var(--spacing-xl) auto;
    text-align: left;
}

.privacy-content .feature-title {
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
}

.privacy-content .feature-title:first-of-type {
    margin-top: 0;
}

.privacy-content .feature-description {
    margin-bottom: var(--spacing-lg);
}

.support-email {
    text-align: center;
    margin: var(--spacing-xl) 0;
}

.support-email .app-store-button {
    font-size: clamp(1.1rem, 1.5vw, 1.3rem);
    padding: var(--spacing-md) var(--spacing-xl);
}

.support-email-link {
    text-decoration: none;
}

.back-link {
    text-align: center;
    margin-top: var(--spacing-xxl);
}

.back-link .app-store-button {
    display: inline-block;
}

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

/* Focus styles for keyboard navigation */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--accent-red);
    outline-offset: 4px;
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
    body {
        background: white;
        color: black;
    }
    
    .frosted-glass,
    .feature-card,
    .technical-content,
    .app-store-button {
        background: white;
        border: 1px solid #ccc;
        box-shadow: none;
    }
    
    .app-store-button {
        display: none;
    }
}