/* 
* FileMergerPro Landing Page Styles
* Google-inspired design with Material Design principles
* Optimized for responsiveness and performance
*/

/* Base Styles and CSS Variables */
:root {
    /* Google color scheme */
    --google-blue: #4285F4;
    --google-red: #DB4437;
    --google-yellow: #F4B400;
    --google-green: #0F9D58;
    --google-grey-100: #F8F9FA;
    --google-grey-200: #EEEEEE;
    --google-grey-300: #DADCE0;
    --google-grey-500: #9AA0A6;
    --google-grey-700: #5F6368;
    --google-grey-900: #202124;
    
    /* Theme colors */
    --primary-bg: #FFFFFF;
    --secondary-bg: var(--google-grey-100);
    --tertiary-bg: var(--google-grey-200);
    --primary-color: var(--google-blue);
    --primary-color-hover: #5A95F5;
    --primary-color-active: #3B78E7;
    --secondary-color: var(--google-green);
    --warning-color: var(--google-yellow);
    --danger-color: var(--google-red);
    --text-primary: var(--google-grey-900);
    --text-secondary: var(--google-grey-700);
    --text-muted: var(--google-grey-500);
    --border-color: var(--google-grey-300);
    --shadow-color: rgba(60, 64, 67, 0.15);
    --glow-color: rgba(66, 133, 244, 0.1);

    /* Typography */
    --font-heading: 'Google Sans', 'Product Sans', Arial, sans-serif;
    --font-main: 'Roboto', Arial, sans-serif;
    --font-code: 'Roboto Mono', monospace;
    
    /* Layout */
    --header-height: 64px;
    --container-max-width: 1200px;
    --section-padding: 60px;
    --border-radius: 8px;
    --button-radius: 24px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Dark Mode Alternative */
@media (prefers-color-scheme: dark) {
    :root {
        --primary-bg: #202124;
        --secondary-bg: #2D2E31;
        --tertiary-bg: #3C4043;
        --text-primary: #FFFFFF;
        --text-secondary: #E1E3E6;
        --text-muted: #9AA0A6;
        --border-color: #5F6368;
    }
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
    font-size: 16px;
}

body {
    font-family: var(--font-main);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--primary-bg);
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-weight: 400;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: all var(--transition-normal);
}

a:hover {
    color: var(--primary-color-hover);
    text-decoration: underline;
}

.container {
    width: 90%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 15px;
}

ul {
    list-style: none;
}

/* Typography Styles */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    margin-bottom: 1rem;
    line-height: 1.3;
    font-weight: 500;
    color: var(--text-primary);
}

h1 {
    font-size: 2.8rem;
    margin-bottom: 1.5rem;
    letter-spacing: -0.5px;
}

h2 {
    font-size: 2.3rem;
    letter-spacing: -0.3px;
}

h3 {
    font-size: 1.8rem;
}

p {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

.section-title {
    text-align: center;
    margin-bottom: 0.8rem;
    position: relative;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    font-size: 1.1rem;
    font-weight: 300;
}

/* Button Styles - Google Material Style */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: var(--button-radius);
    font-weight: 500;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-align: center;
    border: none;
    position: relative;
    overflow: hidden;
    box-shadow: 0 1px 2px rgba(60, 64, 67, 0.3), 0 1px 3px 1px rgba(60, 64, 67, 0.15);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-family: var(--font-heading);
}

.btn:hover {
    text-decoration: none;
    box-shadow: 0 1px 3px rgba(60, 64, 67, 0.3), 0 4px 8px 3px rgba(60, 64, 67, 0.15);
}

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

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

.btn-primary:active {
    background-color: var(--primary-color-active);
    box-shadow: 0 1px 2px rgba(60, 64, 67, 0.3);
}

.btn-secondary {
    background-color: white;
    color: var(--primary-color);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: rgba(66, 133, 244, 0.04);
    color: var(--primary-color);
}

.btn-download {
    background-color: var(--google-blue);
    color: white;
    padding: 12px 24px;
    border-radius: var(--button-radius);
    font-weight: 500;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    box-shadow: 0 1px 2px rgba(60, 64, 67, 0.3), 0 1px 3px 1px rgba(60, 64, 67, 0.15);
    text-transform: none;
    letter-spacing: 0.25px;
}

.btn-download:hover {
    background-color: var(--primary-color-hover);
    color: white;
    box-shadow: 0 1px 3px rgba(60, 64, 67, 0.3), 0 4px 8px 3px rgba(60, 64, 67, 0.15);
}

.btn-download.downloading {
    background-color: var(--secondary-color);
}

/* Header & Navigation - Google Style Nav */
header {
    background-color: var(--primary-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 1px 2px rgba(60, 64, 67, 0.3), 0 2px 6px 2px rgba(60, 64, 67, 0.15);
    height: var(--header-height);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 500;
    color: var(--text-primary);
    letter-spacing: 0px;
}

.version {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-left: 8px;
    opacity: 0.8;
    cursor: help;
}

.nav-links {
    display: flex;
    align-items: center;
    height: 100%;
}

.nav-links li {
    margin-left: 5px;
    height: 100%;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    position: relative;
    padding: 0 15px;
    height: 100%;
    display: flex;
    align-items: center;
    font-family: var(--font-heading);
}

.nav-links a:hover {
    color: var(--primary-color);
    text-decoration: none;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background-color: var(--primary-color);
    transition: width var(--transition-normal);
}

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

.github-link {
    display: flex;
    align-items: center;
    gap: 5px;
    background-color: rgba(66, 133, 244, 0.1);
    padding: 6px 12px;
    border-radius: 20px;
    margin-left: 10px;
}

.github-link:hover {
    background-color: rgba(66, 133, 244, 0.2);
}

.nav-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-primary);
}

/* Emoji Styles with Google Material Design Influence */
.emoji-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    position: relative;
    height: 300px;
    width: 300px;
    margin: 0 auto;
    perspective: 800px;
    transform-style: preserve-3d;
}

.emoji-large {
    font-size: 5rem;
    position: absolute;
    animation: float 6s ease-in-out infinite;
    filter: drop-shadow(0 2px 5px rgba(60, 64, 67, 0.3));
    transition: all var(--transition-normal);
    cursor: pointer;
}

.emoji-large:nth-child(1) {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotateY(0deg);
    animation-delay: 0s;
    color: var(--google-blue);
}

.emoji-large:nth-child(2) {
    top: 25%;
    left: 30%;
    transform: translate(-50%, -50%) rotateY(10deg);
    animation-delay: 1s;
    color: var(--google-red);
}

.emoji-large:nth-child(3) {
    top: 40%;
    left: 70%;
    transform: translate(-50%, -50%) rotateY(-10deg);
    animation-delay: 2s;
    color: var(--google-green);
}

.emoji-small {
    font-size: 2.5rem;
    position: absolute;
    animation: floatSmall 4s ease-in-out infinite;
    opacity: 0.8;
}

.emoji-small:nth-child(4) {
    top: 20%;
    right: 25%;
    animation-delay: 0.5s;
    color: var(--google-yellow);
}

.emoji-small:nth-child(5) {
    bottom: 25%;
    left: 25%;
    animation-delay: 1.5s;
    color: var(--google-blue);
}

.emoji-small:nth-child(6) {
    bottom: 30%;
    right: 30%;
    animation-delay: 1s;
    color: var(--google-red);
}

.feature-emoji {
    display: flex;
    justify-content: center;
    align-items: center;
    min-width: 250px;
    flex: 1;
}

.emoji-feature {
    font-size: 8rem;
    animation: pulse 3s ease-in-out infinite;
    filter: drop-shadow(0 2px 5px rgba(60, 64, 67, 0.3));
    cursor: pointer;
    background-color: white;
    width: 180px;
    height: 180px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 1px 3px rgba(60, 64, 67, 0.3), 0 4px 8px rgba(60, 64, 67, 0.15);
}

.tab-pane:nth-child(1) .emoji-feature {
    color: var(--google-blue);
}

.tab-pane:nth-child(2) .emoji-feature {
    color: var(--google-red);
}

.tab-pane:nth-child(3) .emoji-feature {
    color: var(--google-green);
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) scale(1);
    }
    50% {
        transform: translateY(-20px) scale(1.05);
    }
}

@keyframes floatSmall {
    0%, 100% {
        transform: translateY(0) scale(1) rotate(0deg);
    }
    50% {
        transform: translateY(-10px) scale(1.1) rotate(5deg);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 1px 3px rgba(60, 64, 67, 0.3), 0 4px 8px rgba(60, 64, 67, 0.15);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 2px 6px rgba(60, 64, 67, 0.3), 0 6px 12px rgba(60, 64, 67, 0.2);
    }
}

/* Features Section */
.features {
    padding: var(--section-padding) 0;
    background-color: var(--secondary-bg);
    position: relative;
}

.feature-tabs {
    margin-top: 50px;
}

.tab-nav {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 40px;
}

.tab-btn {
    background-color: var(--tertiary-bg);
    color: var(--text-secondary);
    border: none;
    padding: 12px 24px;
    border-radius: 30px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: all var(--transition-normal);
}

.tab-btn:hover {
    background-color: rgba(65, 164, 245, 0.1);
    color: var(--primary-color);
}

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

.tab-content {
    background-color: var(--tertiary-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    border: 1px solid var(--border-color);
}

.tab-pane {
    display: none;
    animation: fadeIn 0.5s ease;
}

.tab-pane.active {
    display: block;
}

.feature-content {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    padding: 50px;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.feature-content.animated {
    opacity: 1;
    transform: translateY(0);
}

.feature-text {
    flex: 1;
    min-width: 300px;
}

/* Hero Section - Google Style */
.hero {
    padding: 80px 0 60px;
    position: relative;
    overflow: hidden;
    background-color: var(--primary-bg);
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 50% 50%, rgba(66, 133, 244, 0.05) 0%, rgba(66, 133, 244, 0) 70%);
    z-index: -1;
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
}

.hero-content {
    flex: 1;
    min-width: 300px;
    padding-right: 30px;
}

.hero-content h1 {
    color: var(--text-primary);
    margin-bottom: 20px;
}

.hero-content p {
    font-size: 1.1rem;
    margin-bottom: 30px;
    color: var(--text-secondary);
    font-weight: 300;
}

.hero-emoji {
    flex: 1;
    min-width: 300px;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 300px;
}

.glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    height: 80%;
    background: radial-gradient(ellipse at center, var(--glow-color) 0%, rgba(66, 133, 244, 0) 70%);
    z-index: -1;
    filter: blur(20px);
}

.hero-buttons {
    display: flex;
    gap: 15px;
    margin-top: 30px;
}

.feature-list {
    margin-top: 20px;
}

.feature-list li {
    margin-bottom: 12px;
    display: flex;
    align-items: baseline;
}

.feature-list li i {
    color: var(--secondary-color);
    margin-right: 10px;
    font-size: 0.9rem;
}

/* How It Works Section */
.how-it-works {
    padding: var(--section-padding) 0;
    background-color: var(--primary-bg);
}

.steps {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 30px;
    margin-top: 50px;
}

.step {
    flex: 1;
    min-width: 250px;
    text-align: center;
    padding: 30px;
    border-radius: var(--border-radius);
    background-color: var(--secondary-bg);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    opacity: 0;
    transform: translateY(20px);
}

.step.animated {
    opacity: 1;
    transform: translateY(0);
    animation: fadeIn 0.5s ease forwards;
}

.step:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.step-icon {
    margin-bottom: 20px;
    position: relative;
    display: inline-block;
}

.step-icon i {
    font-size: 3rem;
    color: var(--primary-color);
    background-color: rgba(65, 164, 245, 0.1);
    width: 100px;
    height: 100px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(65, 164, 245, 0.2);
    transition: all var(--transition-normal);
}

.step:hover .step-icon i {
    background-color: rgba(65, 164, 245, 0.2);
    transform: scale(1.05);
}

.step-number {
    position: absolute;
    top: 0;
    right: 0;
    background-color: var(--primary-color);
    color: white;
    font-weight: bold;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.1);
    transition: all var(--transition-normal);
}

.step:hover .step-number {
    transform: scale(1.2);
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.2);
}

.step h3 {
    margin: 15px 0;
}

.step p {
    color: var(--text-secondary);
}

/* CTA Section */
.cta {
    padding: 80px 0;
    background-color: var(--secondary-bg);
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(65, 164, 245, 0.1) 0%, rgba(65, 164, 245, 0) 100%);
    z-index: 0;
}

.cta-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.cta h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.cta .btn {
    margin-top: 20px;
    padding: 15px 40px;
    font-size: 1.1rem;
}

/* Download Section - Google Material Cards */
.download {
    padding: var(--section-padding) 0;
    background-color: var(--secondary-bg);
}

.download-options {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    justify-content: center;
    margin-top: 50px;
    margin-bottom: 70px;
}

.download-option {
    flex: 1;
    min-width: 250px;
    max-width: 350px;
    background-color: var(--primary-bg);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    padding: 40px 30px;
    text-align: center;
    transition: all var(--transition-normal);
    position: relative;
    opacity: 0;
    transform: translateY(20px);
    box-shadow: 0 1px 2px rgba(60, 64, 67, 0.3), 0 1px 3px 1px rgba(60, 64, 67, 0.15);
}

.download-option.animated {
    opacity: 1;
    transform: translateY(0);
}

.download-option:hover {
    transform: translateY(-5px);
    box-shadow: 0 1px 3px rgba(60, 64, 67, 0.3), 0 4px 8px 3px rgba(60, 64, 67, 0.15);
}

.download-option.coming-soon {
    opacity: 0.7;
}

.download-option.coming-soon:hover {
    transform: translateY(0);
    border-color: var(--border-color);
}

.coming-soon-label {
    background-color: var(--warning-color);
    color: white;
    font-size: 0.8rem;
    font-weight: 500;
    padding: 5px 10px;
    border-radius: 20px;
    position: absolute;
    top: 20px;
    right: 20px;
    font-family: var(--font-heading);
}

.download-icon {
    margin-bottom: 20px;
}

.download-icon i {
    font-size: 3rem;
    transition: all var(--transition-normal);
}

.download-option:nth-child(1) .download-icon i {
    color: var(--google-blue);
}

.download-option:nth-child(2) .download-icon i {
    color: var(--google-grey-700);
}

.download-option:nth-child(3) .download-icon i {
    color: var(--google-yellow);
}

.download-option:hover .download-icon i {
    transform: scale(1.1);
}

.download-option h3 {
    font-family: var(--font-heading);
    margin-bottom: 10px;
    font-weight: 500;
}

.download-option p {
    color: var(--text-secondary);
    margin-bottom: 25px;
}

.requirements {
    background-color: var(--primary-bg);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    padding: 30px;
    box-shadow: 0 1px 2px rgba(60, 64, 67, 0.3), 0 1px 3px 1px rgba(60, 64, 67, 0.15);
}

.requirements h3 {
    text-align: center;
    margin-bottom: 25px;
    font-family: var(--font-heading);
    font-weight: 500;
}

.requirements-columns {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    gap: 20px;
}

.requirements-columns ul {
    flex: 1;
    min-width: 250px;
}

.requirements-columns li {
    margin-bottom: 10px;
    position: relative;
    padding-left: 20px;
    color: var(--text-secondary);
}

.requirements-columns li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--google-blue);
}

.requirements-columns li strong {
    color: var(--text-primary);
    font-weight: 500;
}

.note {
    text-align: center;
    color: var(--text-secondary);
    font-style: italic;
    margin-top: 20px;
}

/* FAQ Section */
.faq {
    padding: var(--section-padding) 0;
    background-color: var(--secondary-bg);
}

.faq-items {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background-color: var(--tertiary-bg);
    border-radius: var(--border-radius);
    margin-bottom: 15px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.faq-item.animated {
    opacity: 1;
    transform: translateY(0);
}

.faq-question {
    padding: 20px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all var(--transition-normal);
}

.faq-question:hover {
    background-color: rgba(65, 164, 245, 0.05);
}

.faq-question h3 {
    margin: 0;
    font-size: 1.2rem;
    transition: color var(--transition-normal);
}

.faq-item.active .faq-question h3 {
    color: var(--primary-color);
}

.faq-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 24px;
    height: 24px;
    color: var(--text-secondary);
    transition: all var(--transition-normal);
}

.faq-item.active .faq-toggle {
    color: var(--primary-color);
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
}

.faq-item.active .faq-answer {
    max-height: 500px; /* Adjust based on content */
}

.faq-answer p {
    padding: 0 20px 20px;
    color: var(--text-secondary);
}

.faq-answer a {
    color: var(--primary-color);
    text-decoration: underline;
}

.faq-answer a:hover {
    color: var(--primary-color-hover);
}

/* Footer - Google Style */
footer {
    background-color: var(--primary-bg);
    border-top: 1px solid var(--border-color);
    padding: 60px 0 20px;
    margin-top: auto;
    color: var(--text-secondary);
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    flex: 1;
    min-width: 250px;
}

.footer-logo .logo-text {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 500;
    color: var(--text-primary);
}

.footer-links {
    flex: 2;
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
}

.footer-links-column {
    flex: 1;
    min-width: 150px;
}

.footer-links-column h3 {
    font-size: 1rem;
    margin-bottom: 20px;
    color: var(--text-primary);
    font-family: var(--font-heading);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.footer-links-column ul li {
    margin-bottom: 10px;
}

.footer-links-column a {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

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

.footer-bottom {
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-bottom p {
    color: var(--text-secondary);
    margin-bottom: 0;
    font-size: 0.9rem;
}

.made-with-love {
    display: flex;
    align-items: center;
}

.made-with-love a {
    display: flex;
    align-items: center;
    color: var(--text-secondary);
    transition: all var(--transition-normal);
    font-family: var(--font-heading);
    font-size: 0.95rem;
}

.made-with-love a:hover {
    color: var(--primary-color);
    text-decoration: none;
}

.heart {
    color: var(--google-red);
    display: inline-block;
    margin: 0 5px;
    font-size: 1.2rem;
    transition: transform 0.3s ease;
}

.heart.beating {
    animation: heartbeat 1.3s infinite;
}

@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    15% { transform: scale(1.3); }
    30% { transform: scale(1); }
    45% { transform: scale(1.3); }
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    color: var(--text-secondary);
    font-size: 1.2rem;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: var(--secondary-bg);
}

.social-links a:hover {
    color: white;
    transform: translateY(-3px);
    text-decoration: none;
}

.social-links a:nth-child(1):hover {
    background-color: var(--google-blue);
}

.social-links a:nth-child(2):hover {
    background-color: #1DA1F2; /* Twitter blue */
}

.social-links a:nth-child(3):hover {
    background-color: #0A66C2; /* LinkedIn blue */
}

/* Scroll to top button - Google Material FAB */
.scroll-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 56px;
    height: 56px;
    background-color: var(--google-blue);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 100;
    box-shadow: 0 2px 5px 0 rgba(0,0,0,0.26), 0 2px 10px 0 rgba(0,0,0,0.16);
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    background-color: var(--primary-color-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px 0 rgba(0,0,0,0.4), 0 4px 16px 0 rgba(0,0,0,0.2);
}

/* Code Blocks (if you add code examples) */
.code-container {
    position: relative;
    background-color: var(--tertiary-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
    margin: 20px 0;
}

pre {
    padding: 15px;
    overflow-x: auto;
    font-family: var(--font-code);
    font-size: 0.9rem;
    line-height: 1.5;
    position: relative;
}

code {
    color: var(--text-primary);
}

.copy-btn {
    position: absolute;
    top: 5px;
    right: 5px;
    width: 30px;
    height: 30px;
    background-color: var(--tertiary-bg);
    border: none;
    border-radius: 4px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-normal);
}

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

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Responsive Design - Google Style */
@media (max-width: 992px) {
    :root {
        --section-padding: 60px;
    }
    
    h1 {
        font-size: 2.3rem;
    }
    
    h2 {
        font-size: 2rem;
    }
    
    .feature-content {
        padding: 30px;
    }
    
    .hero-content {
        padding-right: 0;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 50px;
        --header-height: 60px;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .hero .container {
        flex-direction: column;
    }
    
    .hero-content {
        text-align: center;
        margin-bottom: 40px;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .nav-toggle {
        display: block;
    }
    
    .nav-links {
        position: fixed;
        top: var(--header-height);
        left: -100%;
        width: 100%;
        height: calc(100vh - var(--header-height));
        background-color: var(--primary-bg);
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        padding-top: 50px;
        transition: all 0.4s ease;
        z-index: 999;
        box-shadow: 2px 0 10px rgba(0,0,0,0.1);
    }
    
    .nav-links.active {
        left: 0;
    }
    
    .nav-links li {
        margin: 15px 0;
        height: auto;
    }
    
    .nav-links a {
        height: auto;
    }
    
    .feature-content {
        flex-direction: column;
    }
    
    .feature-text {
        margin-bottom: 30px;
    }
    
    .feature-emoji {
        order: -1;
        margin-bottom: 30px;
    }
    
    .steps {
        flex-direction: column;
        max-width: 450px;
        margin-left: auto;
        margin-right: auto;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 30px;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }

    .emoji-container {
        height: 250px;
    }

    .emoji-large {
        font-size: 4rem;
    }

    .emoji-small {
        font-size: 2rem;
    }

    .emoji-feature {
        width: 150px;
        height: 150px;
        font-size: 6rem;
    }
}

@media (max-width: 576px) {
    :root {
        --section-padding: 40px;
    }
    
    .container {
        width: 95%;
    }
    
    .hero {
        padding-top: 50px;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .tab-btn {
        padding: 10px 15px;
        font-size: 0.9rem;
    }
    
    .feature-content {
        padding: 20px;
    }
    
    .requirements-columns {
        flex-direction: column;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: 10px;
    }
    
    .btn {
        width: 100%;
    }

    .emoji-container {
        height: 200px;
        width: 200px;
    }

    .emoji-large {
        font-size: 3.5rem;
    }

    .emoji-small {
        font-size: 1.8rem;
    }

    .emoji-feature {
        width: 120px;
        height: 120px;
        font-size: 5rem;
    }
}