:root {
    --color-primary-300: #f0989b;
    --color-primary-400: #e06469;
    --color-primary-500: #bc2f35;
    --color-primary-600: #96252a;
    --color-dark-0: #0f0f0f;
    --color-dark-1: #1a1a1a;
    --color-dark-2: #2d2d2d;
    --color-dark-3: #404040;
    --color-text-primary: #f5f5f5;
    --color-text-secondary: #b0b0b0;
    --color-accent: #888888;
    --spacing-unit: 1rem;
    --border-radius: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', sans-serif;
    color: var(--color-text-primary);
    background-color: var(--color-dark-0);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-unit);
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    margin-bottom: calc(var(--spacing-unit) * 0.5);
    letter-spacing: -0.5px;
}

h1 {
    font-size: 4rem;
    line-height: 1.1;
    background: linear-gradient(135deg, #f0989b, #e06469);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 {
    font-size: 2.5rem;
    margin-bottom: calc(var(--spacing-unit) * 1.5);
    color: var(--color-text-primary);
}

h3 {
    font-size: 1.25rem;
    color: var(--color-text-primary);
}

p {
    margin-bottom: var(--spacing-unit);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.header {
    background: rgba(26, 26, 26, 0.7);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(176, 176, 176, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar {
    padding: calc(var(--spacing-unit) * 1.2) 0;
}

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

.nav-right {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 1.5);
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 0.75);
    text-decoration: none;
}

.logo-img {
    width: 40px;
    height: 40px;
    filter: drop-shadow(0 0 8px rgba(224, 100, 105, 0.3));
}

.logo-text {
    font-size: 1.35rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    background: linear-gradient(135deg, #f0989b, #e06469);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-family: 'Inter', sans-serif;
    text-transform: uppercase;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: calc(var(--spacing-unit) * 2.5);
}

.nav-menu a {
    text-decoration: none;
    color: var(--color-text-secondary);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-menu a:hover {
    color: var(--color-primary-400);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #e06469, #f0989b);
    transition: width 0.3s ease;
}

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

.github-link {
    color: var(--color-text-secondary);
    transition: var(--transition);
    display: flex;
    align-items: center;
}

.github-link:hover {
    color: var(--color-primary-400);
    transform: translateY(-2px);
}

.github-link svg {
    width: 22px;
    height: 22px;
}

.coffee-link {
    color: var(--color-text-secondary);
    transition: var(--transition);
    display: flex;
    align-items: center;
}

.coffee-link:hover {
    color: var(--color-primary-400);
    transform: translateY(-2px);
}

.coffee-link svg {
    width: 22px;
    height: 22px;
}

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: calc(var(--spacing-unit) * 4) 0;
}

.gradient-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(188, 47, 53, 0.15) 0%, rgba(150, 37, 42, 0.1) 50%, rgba(15, 15, 15, 0) 100%);
    z-index: -1;
}

.gradient-bg::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(224, 100, 105, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    filter: blur(80px);
}

.gradient-bg::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(188, 47, 53, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    filter: blur(80px);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.hero-text h1 {
    margin-bottom: var(--spacing-unit);
    text-shadow: 0 4px 20px rgba(224, 100, 105, 0.2);
}

.hero .subtitle {
    font-size: 1.5rem;
    color: var(--color-primary-400);
    margin-bottom: var(--spacing-unit);
    font-weight: 600;
}

.hero .description {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    margin-bottom: calc(var(--spacing-unit) * 2.5);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

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

.btn {
    display: inline-block;
    padding: calc(var(--spacing-unit) * 0.875) calc(var(--spacing-unit) * 1.75);
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: inherit;
    z-index: -1;
    transition: left 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, #e06469 0%, #bc2f35 100%);
    color: white;
    box-shadow: 0 8px 32px rgba(224, 100, 105, 0.3);
    border: 1px solid rgba(240, 152, 155, 0.2);
}

.btn-primary:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 48px rgba(224, 100, 105, 0.4);
}

.btn-secondary {
    background: rgba(45, 45, 45, 0.8);
    color: var(--color-primary-400);
    border: 1.5px solid var(--color-primary-400);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(224, 100, 105, 0.1);
    transform: translateY(-4px);
    box-shadow: 0 8px 32px rgba(224, 100, 105, 0.2);
}

.features {
    padding: calc(var(--spacing-unit) * 10) 0;
    position: relative;
    background: linear-gradient(180deg, rgba(15, 15, 15, 0) 0%, rgba(188, 47, 53, 0.03) 100%);
}

.features h2 {
    text-align: center;
    margin-bottom: calc(var(--spacing-unit) * 3);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: calc(var(--spacing-unit) * 2);
}

.feature-card {
    background: rgba(45, 45, 45, 0.4);
    backdrop-filter: blur(20px);
    padding: calc(var(--spacing-unit) * 2);
    border-radius: var(--border-radius);
    border: 1px solid rgba(224, 100, 105, 0.1);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(224, 100, 105, 0.1) 0%, transparent 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.feature-card:hover {
    border-color: rgba(224, 100, 105, 0.3);
    transform: translateY(-8px);
    box-shadow: 0 16px 48px rgba(224, 100, 105, 0.15);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-icon {
    width: 48px;
    height: 48px;
    margin-bottom: calc(var(--spacing-unit) * 1.25);
    color: var(--color-primary-400);
    opacity: 0.9;
}

.feature-icon i {
    width: 100%;
    height: 100%;
}

.feature-card h3 {
    margin-bottom: var(--spacing-unit);
    color: var(--color-text-primary);
}

.feature-card p {
    margin-bottom: 0;
    font-size: 0.95rem;
}

.about {
    padding: calc(var(--spacing-unit) * 10) 0;
    background: linear-gradient(180deg, rgba(188, 47, 53, 0.05) 0%, rgba(15, 15, 15, 0) 100%);
}

.about h2 {
    text-align: center;
}

.about-content {
    max-width: 800px;
    margin: calc(var(--spacing-unit) * 3) auto 0;
}

.about-text {
    background: rgba(45, 45, 45, 0.3);
    backdrop-filter: blur(10px);
    padding: calc(var(--spacing-unit) * 2.5);
    border-radius: var(--border-radius);
    border: 1px solid rgba(224, 100, 105, 0.1);
}

.about-text p {
    text-align: center;
    margin-bottom: calc(var(--spacing-unit) * 1.5);
}

.about-text p:last-child {
    margin-bottom: 0;
}

.note {
    color: var(--color-primary-400);
    font-weight: 600;
}

.contact {
    padding: calc(var(--spacing-unit) * 10) 0;
}

.download {
    padding: calc(var(--spacing-unit) * 10) 0;
    background: linear-gradient(180deg, rgba(15, 15, 15, 0) 0%, rgba(188, 47, 53, 0.03) 100%);
}

.download h2 {
    text-align: center;
    margin-bottom: calc(var(--spacing-unit) * 3);
}

.download-platforms {
    max-width: 800px;
    margin: 0 auto calc(var(--spacing-unit) * 3);
    display: flex;
    flex-direction: column;
    gap: calc(var(--spacing-unit) * 1.5);
}

.platform-item {
    background: rgba(45, 45, 45, 0.4);
    backdrop-filter: blur(20px);
    border-radius: var(--border-radius);
    border: 1px solid rgba(224, 100, 105, 0.1);
    overflow: hidden;
    transition: var(--transition);
}

.platform-item:hover {
    border-color: rgba(224, 100, 105, 0.2);
}

.platform-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 2);
    cursor: pointer;
    user-select: none;
}

.platform-title {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 1);
}

.platform-title i {
    width: 24px;
    height: 24px;
    color: var(--color-primary-400);
}

.platform-title h3 {
    margin: 0;
    font-size: 1.2rem;
}

.chevron {
    width: 20px;
    height: 20px;
    color: var(--color-text-secondary);
    transition: transform 0.3s ease;
}

.chevron.rotated {
    transform: rotate(180deg);
}

.platform-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    padding: 0 calc(var(--spacing-unit) * 2);
}

.platform-content.active {
    max-height: 500px;
    padding: 0 calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 2);
}

.install-steps {
    margin: 0 0 calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 1.25);
    padding: 0;
}

.install-steps li {
    color: var(--color-text-secondary);
    margin-bottom: calc(var(--spacing-unit) * 0.75);
    line-height: 1.6;
}

.install-steps code {
    background: rgba(224, 100, 105, 0.1);
    color: var(--color-primary-400);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.85rem;
    font-family: 'Courier New', monospace;
}

.download-link {
    display: inline-flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 0.5);
    padding: calc(var(--spacing-unit) * 0.75) calc(var(--spacing-unit) * 1.5);
    background: rgba(224, 100, 105, 0.1);
    border: 1px solid rgba(224, 100, 105, 0.3);
    border-radius: 10px;
    color: var(--color-primary-400);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.download-link:hover {
    background: rgba(224, 100, 105, 0.15);
    border-color: var(--color-primary-400);
    transform: translateY(-2px);
}

.download-link i {
    width: 18px;
    height: 18px;
}

.install-note {
    text-align: center;
    margin-top: calc(var(--spacing-unit) * 3);
}

.install-note p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

.install-note a {
    color: var(--color-primary-400);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.install-note a:hover {
    color: var(--color-primary-300);
}

.opensource {
    padding: calc(var(--spacing-unit) * 10) 0;
    background: linear-gradient(180deg, rgba(188, 47, 53, 0.05) 0%, rgba(15, 15, 15, 0) 100%);
}

.opensource-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.opensource-content h2 {
    margin-bottom: calc(var(--spacing-unit) * 1.5);
}

.opensource-content p {
    font-size: 1.05rem;
    margin-bottom: calc(var(--spacing-unit) * 2.5);
}

.opensource-links {
    display: flex;
    gap: calc(var(--spacing-unit) * 1.5);
    flex-wrap: wrap;
    justify-content: center;
}

.link-button {
    display: inline-flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 0.5);
    padding: calc(var(--spacing-unit) * 0.75) calc(var(--spacing-unit) * 1.5);
    background: rgba(45, 45, 45, 0.4);
    border: 1px solid rgba(224, 100, 105, 0.2);
    border-radius: 10px;
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.link-button:hover {
    background: rgba(224, 100, 105, 0.1);
    border-color: var(--color-primary-400);
    color: var(--color-primary-400);
    transform: translateY(-2px);
}

.link-button i {
    width: 18px;
    height: 18px;
}

.link-button-sponsor {
    background: rgba(224, 100, 105, 0.1);
    border-color: rgba(224, 100, 105, 0.3);
    color: var(--color-primary-400);
}

.link-button-sponsor:hover {
    background: rgba(224, 100, 105, 0.2);
    border-color: var(--color-primary-400);
}

.contact h2 {
    text-align: center;
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.contact-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.contact-content p {
    font-size: 1.05rem;
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.links-grid {
    display: flex;
    gap: var(--spacing-unit);
    justify-content: center;
    flex-wrap: wrap;
}

.footer {
    background: rgba(26, 26, 26, 0.7);
    backdrop-filter: blur(10px);
    color: var(--color-text-secondary);
    padding: calc(var(--spacing-unit) * 3) 0;
    text-align: center;
    border-top: 1px solid rgba(176, 176, 176, 0.1);
}

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

.footer a {
    color: var(--color-primary-400);
    text-decoration: none;
    transition: var(--transition);
}

.footer a:hover {
    color: var(--color-primary-300);
}

.placeholder-page {
    position: relative;
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.placeholder-content {
    text-align: center;
    max-width: 600px;
    position: relative;
    z-index: 1;
}

.placeholder-icon {
    width: 80px;
    height: 80px;
    color: var(--color-primary-400);
    margin: 0 auto calc(var(--spacing-unit) * 2);
    opacity: 0.8;
}

.placeholder-content h1 {
    margin-bottom: calc(var(--spacing-unit) * 1.5);
}

.placeholder-content p {
    font-size: 1.1rem;
    margin-bottom: calc(var(--spacing-unit) * 2.5);
}

@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    .nav-menu {
        gap: var(--spacing-unit);
        font-size: 0.9rem;
    }

    .hero {
        min-height: auto;
        padding: calc(var(--spacing-unit) * 8) 0;
    }

    .hero-text h1 {
        font-size: 2.5rem;
    }

    .cta-buttons {
        flex-direction: column;
        gap: calc(var(--spacing-unit) * 0.75);
    }

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

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

    .links-grid {
        flex-direction: column;
    }

    .about-text {
        padding: calc(var(--spacing-unit) * 1.5);
    }

    .platform-header {
        padding: calc(var(--spacing-unit) * 1.25);
    }

    .platform-content.active {
        padding: 0 calc(var(--spacing-unit) * 1.25) calc(var(--spacing-unit) * 1.5);
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.75rem;
    }

    h2 {
        font-size: 1.35rem;
    }

    .nav-menu {
        display: none;
    }

    .github-link svg {
        width: 20px;
        height: 20px;
    }

    .hero {
        padding: calc(var(--spacing-unit) * 4) 0;
    }

    .hero .subtitle {
        font-size: 1.2rem;
    }

    .hero .description {
        font-size: 1rem;
    }

    .features {
        padding: calc(var(--spacing-unit) * 6) 0;
    }

    .about {
        padding: calc(var(--spacing-unit) * 6) 0;
    }

    .contact {
        padding: calc(var(--spacing-unit) * 6) 0;
    }

    .download {
        padding: calc(var(--spacing-unit) * 6) 0;
    }

    .download-platforms {
        max-width: 100%;
    }

    .opensource {
        padding: calc(var(--spacing-unit) * 6) 0;
    }

    .opensource-links {
        flex-direction: column;
    }

    .link-button {
        width: 100%;
        justify-content: center;
    }
}