/* Modern Single Page Design - Dark Theme with Larger Fonts */

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

:root {
    /* Dark Color Palette */
    --color-bg-dark: #0f1419;
    --color-bg-medium: #1a1f2e;
    --color-bg-light: #242b3d;
    --color-bg-card: #2a3447;

    /* Accent Colors */
    --color-primary: #4f46e5;
    --color-primary-hover: #6366f1;
    --color-secondary: #8b5cf6;
    --color-accent: #06b6d4;

    /* Text Colors */
    --color-text-primary: #f1f5f9;
    --color-text-secondary: #cbd5e1;
    --color-text-muted: #94a3b8;

    /* Border Colors */
    --color-border: #334155;
    --color-border-light: #475569;

    /* Modern Typography Scale */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.875rem;
    /* 14px */
    --font-size-sm: 1rem;
    /* 16px */
    --font-size-base: 1.125rem;
    /* 18px */
    --font-size-lg: 1.25rem;
    /* 20px */
    --font-size-xl: 1.5rem;
    /* 24px */
    --font-size-2xl: 1.875rem;
    /* 30px */
    --font-size-3xl: 2.25rem;
    /* 36px */
    --font-size-4xl: 3rem;
    /* 48px */
    --font-size-5xl: 3.75rem;
    /* 60px */

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--color-text-primary);
    background-color: var(--color-bg-dark);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Fixed Navigation */
.nav-fixed {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    /*background-color: rgba(20, 49, 108, 0.51);*/
    background: linear-gradient(135deg, #0f1729 0%, #1e3a5f 50%, #2563eb 100%);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(59, 130, 246, 0.3);
    padding: var(--spacing-sm) 0;
    transition: all 0.3s ease;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.2);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo img {
    height: 50px;
    width: auto;
    transition: opacity 0.3s ease;
}

.nav-logo:hover img {
    opacity: 0.8;
}

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

.nav-menu a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
    position: relative;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: #ffffff;
    background-color: rgba(59, 130, 246, 0.3);
}

.nav-cta {
    background-color: var(--color-primary) !important;
    color: var(--color-text-primary) !important;
    padding: var(--spacing-xs) var(--spacing-md) !important;
}

.nav-cta:hover {
    background-color: var(--color-primary-hover) !important;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background-color: rgba(255, 255, 255, 0.9);
    transition: all 0.3s ease;
}

/* Hero Section */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-3xl) var(--spacing-lg);
    background: linear-gradient(135deg, #0f1729 0%, #1e3a5f 50%, #2563eb 100%);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, rgba(37, 99, 235, 0.15) 0%, transparent 60%);
    pointer-events: none;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-content h1 {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, #f1f5f9 0%, #a5b4fc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-lead {
    font-size: var(--font-size-xl);
    line-height: 1.6;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-2xl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-lg);
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-text-primary);
    box-shadow: var(--shadow-md);
}

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

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

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

/* Section Styles */
.section {
    padding: var(--spacing-3xl) var(--spacing-lg);
}

.section:nth-child(even) {
    background-color: var(--color-bg-medium);
}

.section-container {
    max-width: 1200px;
    margin: 0 auto;
}

.section h2 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-primary);
}

.section-intro {
    font-size: var(--font-size-xl);
    text-align: center;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-2xl);
}

.sub-section-header {
    text-align: center;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-2xl);
}

.feature-card {
    background-color: var(--color-bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
    transition: all 0.3s ease;
    text-align: center;
}

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

.feature-icon {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-md);
}

.feature-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

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

/* Quotes Section */
.quotes-section {
    background: linear-gradient(135deg, #0f1729 0%, #1a2642 100%);
}

.quotes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-2xl);
}

.quote-card {
    background: linear-gradient(135deg, var(--color-bg-card) 0%, var(--color-bg-light) 100%);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    position: relative;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
}

.quote-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-accent);
}

.quote-mark {
    font-size: 4rem;
    font-weight: 700;
    color: var(--color-accent);
    opacity: 0.3;
    line-height: 1;
    margin-bottom: var(--spacing-sm);
    font-family: Georgia, serif;
}

.quote-text {
    font-size: var(--font-size-lg);
    font-style: italic;
    color: var(--color-text-primary);
    line-height: 1.6;
    position: relative;
    margin-bottom: var(--spacing-sm);
}

.quote-attribution {
    font-size: var(--font-size-base);
    color: var(--color-text-muted);
    font-style: normal;
    text-align: right;
    margin-top: var(--spacing-sm);
}

/* About Section */
.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-content p {
    font-size: var(--font-size-lg);
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* Screenshots Grid */
.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-2xl);
}

.screenshot-item {
    background-color: var(--color-bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-border);
    transition: all 0.3s ease;
}

.screenshot-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-accent);
}

.screenshot-item a {
    display: block;
    text-decoration: none;
    color: inherit;
}

.screenshot-item img {
    width: 100%;
    height: auto;
    display: block;
}

.screenshot-item p {
    padding: var(--spacing-md);
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    text-align: center;
}

.section-cta {
    margin-top: var(--spacing-2xl);
    text-align: center;
}

.section-cta p {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
}

.section-cta a {
    color: var(--color-accent);
    text-decoration: underline;
}

.section-cta a:hover {
    color: var(--color-primary-hover);
}

/* Technical List */
.technical-content {
    max-width: 900px;
    margin: 0 auto;
}

.technical-list {
    list-style: none;
    padding: 0;
}

.technical-list li {
    font-size: var(--font-size-lg);
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    padding-left: var(--spacing-xl);
    position: relative;
}

.technical-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: 700;
    font-size: var(--font-size-xl);
}

/* Form Container */
.form-container {
    max-width: 700px;
    margin: var(--spacing-2xl) auto 0;
    background-color: #8d93a0;
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
}

/* Open Section Blockquote */
.open-content {
    max-width: 900px;
    margin: 0 auto;
}

.open-content p {
    font-size: var(--font-size-lg);
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.open-content a {
    color: var(--color-accent);
    text-decoration: underline;
}

.open-content a:hover {
    color: var(--color-primary-hover);
}

.open-content blockquote {
    background-color: var(--color-bg-card);
    border-left: 4px solid var(--color-primary);
    padding: var(--spacing-lg);
    margin: var(--spacing-2xl) 0;
    font-style: italic;
    font-size: var(--font-size-base);
    border-radius: var(--radius-md);
}

.open-content blockquote footer {
    margin-top: var(--spacing-md);
    font-style: normal;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* Evaluation Section */
.evaluation-content {
    max-width: 900px;
    margin: 0 auto;
}

.evaluation-content p {
    font-size: var(--font-size-lg);
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.evaluation-features {
    list-style: none;
    padding: 0;
    margin: var(--spacing-xl) 0;
}

.evaluation-features li {
    font-size: var(--font-size-lg);
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-xl);
    position: relative;
}

.evaluation-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: 700;
    font-size: var(--font-size-xl);
}

.evaluation-cta {
    margin-top: var(--spacing-2xl);
    text-align: center;
}

/* Contact Section */
.contact-content {
    max-width: 900px;
    margin: 0 auto;
}

.contact-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

.contact-method {
    background-color: var(--color-bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
    text-align: center;
}

.contact-method h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
}

.contact-method p {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.contact-link {
    color: var(--color-accent);
    font-size: var(--font-size-lg);
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    padding: var(--spacing-sm) 0;
    transition: color 0.3s ease;
}

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

/* Footer */
.footer {
    background-color: var(--color-bg-dark);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-2xl) var(--spacing-lg);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.footer-copyright {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

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

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

.footer-social {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.footer-social span {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-right: var(--spacing-xs);
}

.footer-social a {
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

.footer-social a:hover {
    opacity: 1;
}

/* Responsive Design */
@media (max-width: 1024px) {
    :root {
        --font-size-5xl: 3rem;
        --font-size-4xl: 2.5rem;
        --font-size-3xl: 2rem;
    }

    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-5xl: 2.5rem;
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.75rem;
        --font-size-xl: 1.25rem;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background-color: rgba(20, 49, 108, 0.95);
        flex-direction: column;
        padding: var(--spacing-lg);
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        border-bottom: 1px solid rgba(59, 130, 246, 0.3);
        box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    }

    .nav-menu.active {
        transform: translateX(0);
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

    .hero-section {
        min-height: 80vh;
        padding: 120px var(--spacing-md) var(--spacing-2xl);
    }

    .section {
        padding: var(--spacing-2xl) var(--spacing-md);
    }

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

    .screenshots-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    :root {
        --font-size-5xl: 2rem;
        --font-size-4xl: 1.75rem;
        --font-size-base: 1rem;
        --font-size-lg: 1.125rem;
    }

    .btn {
        width: 100%;
        text-align: center;
    }

    .hero-cta {
        flex-direction: column;
    }
}