:root {
    --orange-primary: #FF8C00;
    --orange-secondary: #ED7421;
    --yellow: #FCC209;
    --cream: #F7EEE3;
    --white: #FFFFFF;
    --black: #000000;
    --gradient-primary: linear-gradient(135deg, #FF8C00 0%, #ED7421 50%, #FCC209 100%);
    --gradient-background: linear-gradient(135deg, #F7EEE3 0%, #FFFFFF 50%, #F7EEE3 100%);
    --shadow-soft: 0 4px 20px rgba(255, 140, 0, 0.1);
    --shadow-medium: 0 8px 30px rgba(255, 140, 0, 0.15);
    --shadow-strong: 0 12px 40px rgba(255, 140, 0, 0.2);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: var(--black);
    background: var(--gradient-background);
    background-attachment: fixed;
    overflow-x: hidden;
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-background);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    transition: opacity 0.5s ease;
    gap: 2rem;
}

.logo-container {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.loading-logo {
    width: 100px;
    height: 100px;
    border-radius: 25px;
    animation: logoFloat 1.5s ease-in-out infinite;
    box-shadow: var(--shadow-strong);
}

.loading-text {
    text-align: center;
    animation: textFadeIn 1s ease-out 0.5s forwards;
    opacity: 0;
}

.loading-line {
    font-size: 1.8rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    line-height: 1.2;
}

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

.floating-element {
    position: absolute;
    width: 20px;
    height: 20px;
    background: var(--gradient-primary);
    border-radius: 50%;
    opacity: 0.1;
    animation: float 8s ease-in-out infinite;
}

/* Sticky Header */
.sticky-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(5px);
    border-bottom: 1px solid transparent;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    padding: 1rem 0;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.header-logo-img {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    transition: transform 0.3s ease;
}

.header-logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1;
    transition: opacity 0.3s ease;
}

.header-line {
    font-size: 1rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    white-space: nowrap;
}

.header-nav {
    display: flex;
    gap: 2rem;
}

.header-nav a {
    text-decoration: none;
    color: var(--black);
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.header-nav a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background: var(--gradient-primary);
    transition: width 0.3s ease;
}

.header-nav a:hover::after {
    width: 100%;
}

.header-google-btn {
    background: var(--white);
    border: 2px solid var(--orange-primary);
    color: var(--orange-primary);
    padding: 0.5rem 1rem;
    border-radius: 25px;
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.header-google-btn:hover {
    background: var(--orange-primary);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

/* Main Content */
.main-content {
    padding-top: 100px;
}

/* Hero Section */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 2rem 0;
    position: relative;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    opacity: 0;
    transform: translateY(30px);
    animation: heroFadeIn 1s ease-out 0.5s forwards;
}

.hero-logo {
    margin-bottom: 3rem;
}

.hero-logo-img {
    width: 120px;
    height: 120px;
    border-radius: 30px;
    box-shadow: var(--shadow-strong);
    animation: logoScale 1s ease-out 1s;
}

.hero-title-container {
    margin-bottom: 2rem;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 4rem);
    font-weight: 700;
    margin-bottom: 0.25rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    line-height: 1.1;
}

.hero-title:last-child {
    margin-bottom: 0;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 4vw, 1.5rem);
    color: var(--black);
    margin-bottom: 3rem;
    opacity: 0.8;
    line-height: 1.5;
}

.hero-cta {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.main-google-btn {
    background: var(--gradient-primary);
    border: none;
    color: var(--white);
    padding: 1rem 2rem;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-medium);
    min-width: 250px;
    justify-content: center;
}

.main-google-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-strong);
}

.cta-message {
    color: var(--orange-secondary);
    font-style: italic;
    font-size: 0.95rem;
}

/* Features Section */
.features-section {
    padding: 6rem 0;
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(10px);
}

.features-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.features-title {
    text-align: center;
    font-size: clamp(2rem, 6vw, 3rem);
    font-weight: 700;
    margin-bottom: 4rem;
    color: var(--black);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-item {
    background: var(--white);
    padding: 2.5rem 2rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: var(--shadow-soft);
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(30px);
    border: 1px solid rgba(255, 140, 0, 0.1);
}

.feature-item.animate-in {
    opacity: 1;
    transform: translateY(0);
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    display: block;
}

.feature-item h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--orange-secondary);
}

.feature-item p {
    color: var(--black);
    opacity: 0.8;
    line-height: 1.6;
}

/* Why Reading Section */
.why-reading-section {
    padding: 6rem 0;
    background: rgba(255, 140, 0, 0.05);
}

.why-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.why-reading-section h2 {
    text-align: center;
    font-size: clamp(2rem, 6vw, 3rem);
    font-weight: 700;
    margin-bottom: 4rem;
    color: var(--black);
}

.comparison-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
}

.comparison-item {
    background: var(--white);
    padding: 2.5rem 2rem;
    border-radius: 20px;
    box-shadow: var(--shadow-soft);
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(30px);
}

.comparison-item.animate-in {
    opacity: 1;
    transform: translateY(0);
}

.comparison-item.bad {
    border-left: 5px solid #e74c3c;
}

.comparison-item.good {
    border-left: 5px solid #27ae60;
}

.comparison-item h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--black);
}

.comparison-item ul {
    list-style: none;
    padding: 0;
}

.comparison-item li {
    margin-bottom: 1rem;
    padding-left: 2rem;
    position: relative;
    color: var(--black);
    opacity: 0.8;
}

.comparison-item.bad li::before {
    content: "❌";
    position: absolute;
    left: 0;
}

.comparison-item.good li::before {
    content: "✅";
    position: absolute;
    left: 0;
}

/* Final CTA Section */
.final-cta-section {
    padding: 6rem 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(15px);
}

.final-cta-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 2rem;
    text-align: center;
}

.final-cta-section h2 {
    font-size: clamp(2rem, 6vw, 3rem);
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--black);
}

.final-cta-section p {
    font-size: 1.25rem;
    margin-bottom: 3rem;
    color: var(--black);
    opacity: 0.8;
}

.final-google-btn {
    background: var(--gradient-primary);
    border: none;
    color: var(--white);
    padding: 1.25rem 2.5rem;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-medium);
}

.final-google-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-strong);
}

/* Footer */
.footer {
    background: var(--black);
    color: var(--white);
    padding: 3rem 0 2rem;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-logo {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-logo-img {
    width: 40px;
    height: 40px;
    border-radius: 10px;
}

.footer-logo p {
    font-size: 0.9rem;
    color: var(--cream);
    opacity: 0.8;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: var(--white);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--yellow);
}

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

@keyframes textFadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
    }
    33% {
        transform: translateY(-20px) rotate(120deg);
    }
    66% {
        transform: translateY(10px) rotate(240deg);
    }
}

@keyframes heroFadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes logoScale {
    0% {
        transform: scale(0.8);
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
    }
}

/* Mobile Optimizations */
@media (max-width: 768px) {
    .header-container {
        padding: 0 1rem;
    }
    
    .header-nav {
        display: none;
    }
    
    .header-google-btn {
        padding: 0.5rem 1rem;
        font-size: 0.8rem;
    }
    
    .header-line {
        font-size: 0.85rem;
    }
    
    .main-content {
        padding-top: 80px;
    }
    
    .hero-section {
        min-height: 90vh;
        padding: 1rem 0;
    }
    
    .hero-container {
        padding: 0 1rem;
    }
    
    .hero-logo-img {
        width: 80px;
        height: 80px;
        border-radius: 20px;
    }
    
    .loading-logo {
        width: 80px;
        height: 80px;
        border-radius: 20px;
    }
    
    .loading-line {
        font-size: 1.5rem;
    }
    
    .main-google-btn {
        padding: 1rem 1.5rem;
        font-size: 1rem;
        min-width: 200px;
    }
    
    .features-container,
    .why-container,
    .final-cta-container {
        padding: 0 1rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .feature-item {
        padding: 2rem 1.5rem;
    }
    
    .comparison-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .loading-logo {
        width: 60px;
        height: 60px;
        border-radius: 15px;
    }
    
    .loading-line {
        font-size: 1.25rem;
    }
    
    .header-logo-img {
        width: 32px;
        height: 32px;
    }
    
    .header-line {
        font-size: 0.75rem;
    }
    
    .hero-logo-img {
        width: 60px;
        height: 60px;
        border-radius: 15px;
    }
    
    .hero-title {
        margin-bottom: 0.2rem;
    }
    
    .main-google-btn,
    .final-google-btn {
        padding: 0.875rem 1.25rem;
        font-size: 0.95rem;
        min-width: 180px;
    }
    
    .feature-item {
        padding: 1.5rem 1rem;
    }
    
    .feature-icon {
        font-size: 2.5rem;
    }
    
    .footer-links {
        gap: 1rem;
    }
}

/* High-performance scroll animations */
@media (prefers-reduced-motion: no-preference) {
    .feature-item,
    .comparison-item {
        transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1),
                    opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    }
}

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