/* CSS Variables */
:root {
    /* Colors - Base */
    --background: 224 71.4% 4.1%;
    --background-rgb: 3, 8, 18;
    --foreground: 210 20% 98%;
    --primary: 123 70% 50.4%;
    --primary-foreground: 210 20% 98%;
    
    /* Colors - RGB Values */
    --rgb-white: 255, 255, 255;
    --rgb-black: 0, 0, 0;
    
    /* Colors - Semantic */
    --text-primary: rgb(248 250 252);
    --text-secondary: rgb(203 213 225);
    --text-muted: rgb(156 163 175);
    --text-hover: rgb(255 255 255);
    
    /* Colors - Brand */
    --button-primary: #7cb698;
    --button-hover: #62a29e;
    --discord-primary: #7983f2;
    --discord-hover: #5a63c4;
    --link-color: #3182ce;
    --link-hover: #2c5282;
    --github-sponsors-color: #db61a2;
    --github-sponsors-hover: #c44a8a;
    --patreon-color: #f96854;
    --patreon-hover: #e65744;
    
    /* Colors - UI */
    --card-background: rgba(39, 39, 42, 0.25);
    --border-color: rgb(39 39 42);
    --border-hover: rgba(255, 255, 255, 0.4);
    --border-hover-muted: rgba(255, 255, 255, 0.2);
    --divider-color: rgba(255, 255, 255, 0.1);
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-size-xs: 0.8125rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2.5rem;
    --font-size-4xl: 3.75rem;
    
    /* Spacing */
    --spacing-xs: 0.375rem;
    --spacing-sm: 0.5rem;
    --spacing-base: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.25rem;
    --spacing-xl: 1.5rem;
    --spacing-2xl: 2rem;
    --spacing-3xl: 3rem;
    --spacing-4xl: 4rem;
    --spacing-5xl: 8rem;
    
    /* Layout */
    --container-max-width: 1000px;
    --section-spacing: 4rem;
    --card-padding: 1.5rem;
    --border-radius: 8px;
    --border-radius-full: 9999px;
    
    /* Effects */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-button: 0px 1px 35px;
    --transition-duration: 0.3s;
    --transition: all var(--transition-duration) ease;
    
    /* Z-index */
    --z-navbar: 20;
}

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

html {
    font-family: var(--font-family);
    line-height: 1.5;
    color-scheme: dark;
    background-color: hsl(var(--background));
}

body {
    background-color: hsl(var(--background));
    color: hsl(var(--foreground));
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

/* Navigation */
.navbar {
    position: sticky;
    top: 0;
    z-index: var(--z-navbar);
    backdrop-filter: blur(0);
    background-color: rgba(var(--background-rgb), 0);
    border-bottom: 1px solid rgba(24, 24, 27, 0);
    transition: backdrop-filter var(--transition-duration) ease,
                background-color var(--transition-duration) ease,
                border-color var(--transition-duration) ease;
}

.navbar.scrolled {
    backdrop-filter: blur(8px);
    background-color: rgba(var(--background-rgb), 0.6);
    border-bottom: 1px solid rgba(24, 24, 27, 0.7);
}

.nav-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: var(--spacing-base) var(--spacing-2xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-base);
    text-decoration: none;
    color: inherit;
}

.nav-logo span {
    font-weight: 600;
}

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

.nav-links .primary-button {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-base);
}

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

.nav-items a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.nav-items a:hover {
    color: var(--text-hover);
}

/* Hero Section */
.hero {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-5xl) var(--spacing-2xl) var(--spacing-4xl);
    gap: var(--spacing-lg);
}

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    line-height: 1.125;
    margin: 0;
    background: linear-gradient(to right, #dcd3ff, var(--button-primary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: slideDown 750ms ease both;
}

.hero-subtitle {
    font-size: var(--font-size-2xl);
    color: rgba(212, 212, 216, 0.9);
    max-width: 768px;
    margin: 0;
    animation: slideDown 750ms ease both;
    animation-delay: 300ms;
}

/* Buttons */
.button-container {
    display: flex;
    gap: var(--spacing-md);
    animation: slideDown 750ms ease both;
    animation-delay: 450ms;
}

.primary-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-base) var(--spacing-lg);
    font-size: var(--font-size-lg);
    font-weight: 500;
    color: var(--text-primary);
    background: linear-gradient(45deg, var(--button-primary), var(--button-hover));
    border-radius: var(--border-radius-full);
    text-decoration: none;
    transition: var(--transition);
}

.primary-button:hover {
    opacity: 0.9;
    box-shadow: rgb(124 182 152 / 0.5) var(--shadow-button);
    color: var(--text-hover);
}

.secondary-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-base) var(--spacing-lg);
    font-size: var(--font-size-lg);
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--border-radius-full);
    text-decoration: none;
    transition: var(--transition);
}

.secondary-button:hover {
    color: var(--text-hover);
}

/* Demo Container */
.demo-container {
    margin-top: var(--spacing-4xl);
    animation: perspectiveIn 1000ms ease both;
    animation-delay: 900ms;
    width: 100%;
    max-width: var(--container-max-width);
}

.demo-container img {
    width: 100%;
    height: auto;
    border-radius: var(--spacing-md);
    box-shadow: var(--shadow-lg);
}

/* Features Section */
.features-section {
    padding: var(--section-spacing) var(--spacing-2xl);
    max-width: var(--container-max-width);
    margin: 0 auto;
}

.features-section h2 {
    font-size: var(--font-size-3xl);
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.features-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

.feature-card {
    background: var(--card-background);
    padding: var(--spacing-md) var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.feature-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.feature-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--spacing-md);
}

.feature-card h3 {
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-xl);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    line-height: 1.6;
}

.features-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-base);
    margin-top: var(--spacing-2xl);
}

.feature-tag {
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-full);
    color: rgb(228 228 231);
    font-size: var(--font-size-sm);
    transition: var(--transition);
}

.feature-tag:hover {
    border-color: var(--border-hover);
}

/* Testimonials Section */
.testimonials-section {
    padding: var(--section-spacing) var(--spacing-2xl);
    margin: 0 auto;
}

.testimonials-section h2 {
    font-size: var(--font-size-3xl);
    text-align: center;
    margin-bottom: var(--spacing-3xl);
    max-width: var(--container-max-width);
    margin-left: auto;
    margin-right: auto;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--spacing-md);
    max-width: 1400px;
    margin: 0 auto;
}

.testimonials-column {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.testimonial {
    background: var(--card-background);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.testimonial:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.testimonial-text {
    font-size: var(--font-size-lg);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
    flex-grow: 1;
}

.testimonial-author {
    border-top: 1px solid var(--divider-color);
    padding-top: var(--spacing-md);
    margin-top: auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.author-name {
    font-weight: 600;
    color: var(--text-primary);
}

.testimonial-date {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

/* Support Section */
.support-section {
    padding: var(--section-spacing) var(--spacing-2xl);
    max-width: var(--container-max-width);
    margin: 0 auto;
    text-align: center;
}

.support-section h2 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-xl);
}

.support-description {
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    max-width: 768px;
    margin: 0 auto var(--spacing-2xl);
}

.support-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-2xl);
}

.support-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-base) var(--spacing-xl);
    border-radius: var(--border-radius-full);
    text-decoration: none;
    transition: var(--transition);
    font-weight: 500;
    color: var(--text-primary);
}

.support-button.github {
    background: linear-gradient(45deg, var(--github-sponsors-color), var(--github-sponsors-hover));
}

.support-button.github:hover {
    opacity: 0.9;
    box-shadow: rgb(219 97 162 / 0.5) var(--shadow-button);
    color: var(--text-hover);
}

.support-button.patreon {
    background: linear-gradient(45deg, var(--patreon-color), var(--patreon-hover));
}

.support-button.patreon:hover {
    opacity: 0.9;
    box-shadow: rgb(249 104 84 / 0.5) var(--shadow-button);
    color: var(--text-hover);
}

.support-info {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    max-width: 600px;
    margin: 0 auto;
}

/* Footer */
footer {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--text-secondary);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-md);
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition);
    font-size: var(--font-size-sm);
}

.footer-links a:hover {
    color: var(--text-hover);
    text-decoration: underline;
}

/* Animations */
@keyframes slideDown {
    0% {
        opacity: 0;
        transform: translateY(-15px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes perspectiveIn {
    0% {
        opacity: 0;
        transform: perspective(500px) translateY(15px) rotateX(3deg);
    }
    100% {
        opacity: 1;
        transform: perspective(500px) translateY(0) rotateX(0);
    }
}

/* Media Queries */
@media (max-width: 1400px) {
    .testimonials-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 1200px) {
    .features-container {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .testimonials-grid {
        grid-template-columns: repeat(3, 1fr);
        max-width: var(--container-max-width);
    }
}

@media (max-width: 1024px) {
    .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-xl);
    }
    
    .button-container {
        flex-direction: column;
    }
    
    .nav-items {
        display: none;
    }
    
    .features-container {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        gap: var(--spacing-sm);
    }
    
    .feature-tag {
        padding: var(--spacing-xs) var(--spacing-md);
        font-size: var(--font-size-xs);
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .testimonials-column {
        margin-top: 0 !important;
    }
}