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

:root {
    --bg-dark: #0a0a0a;
    --bg-darker: #050505;
    --bg-card: #1a1a1a;
    --bg-hover: #252525;
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --text-tertiary: #808080;
    --accent-primary: #105373;
    --accent-hover: #0d4159;
    --border-color: #2a2a2a;
    --shadow: rgba(0, 0, 0, 0.4);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navigation */
.navbar {
    background: var(--bg-darker);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-img {
    width: 40px;
    height: 40px;
    border-radius: 8px;
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary), #1a7a9e);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 32px;
}

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

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-primary);
    transition: width 0.3s ease;
}

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

/* Hero Section */
.hero {
    padding: 120px 0;
    background: linear-gradient(180deg, var(--bg-darker) 0%, var(--bg-dark) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, rgba(16, 83, 115, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

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

.hero-title {
    font-size: 64px;
    font-weight: 800;
    margin-bottom: 24px;
    line-height: 1.1;
    background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 48px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 32px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 16px 32px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-icon {
    width: 20px;
    height: 20px;
}

.btn-primary {
    background: var(--accent-primary);
    color: white;
    box-shadow: 0 4px 16px rgba(16, 83, 115, 0.3);
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(16, 83, 115, 0.4);
}

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

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

.version-info {
    display: flex;
    gap: 16px;
    justify-content: center;
    align-items: center;
}

.version-badge,
.update-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
    color: var(--text-secondary);
}

.badge-icon {
    width: 16px;
    height: 16px;
    color: var(--accent-primary);
}

/* Stats Section */
.stats {
    padding: 80px 0;
    background: var(--bg-darker);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 48px;
    text-align: center;
}

.stat-item {
    padding: 24px;
}

.stat-number {
    font-size: 48px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-primary), #1a7a9e);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 12px;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 16px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Features Section */
.features {
    padding: 100px 0;
    background: var(--bg-dark);
}

.section-title {
    font-size: 48px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 64px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 32px;
    transition: all 0.3s ease;
}

.feature-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px var(--shadow);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: rgba(76, 175, 80, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-icon svg {
    width: 28px;
    height: 28px;
    color: var(--accent-primary);
}

.feature-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature-description {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.6;
}

/* How It Works Section */
.how-it-works {
    padding: 100px 0;
    background: var(--bg-darker);
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 18px;
    margin-top: -40px;
    margin-bottom: 64px;
}

.workflow {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 32px;
    max-width: 1000px;
    margin: 0 auto;
}

.workflow-item {
    flex: 1;
    text-align: center;
    padding: 32px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.workflow-item:hover {
    transform: translateY(-8px);
    border-color: var(--accent-primary);
    box-shadow: 0 12px 32px var(--shadow);
}

.workflow-number {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--accent-primary), #1a7a9e);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    margin: 0 auto 20px;
}

.workflow-item h3 {
    font-size: 20px;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.workflow-item p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
}

.workflow-arrow {
    font-size: 32px;
    color: var(--accent-primary);
    font-weight: 300;
}

/* Download Section */
.download {
    padding: 100px 0;
    background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-darker) 100%);
}

.download-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 18px;
    margin-bottom: 64px;
}

.download-content {
    max-width: 800px;
    margin: 0 auto;
}

.download-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 32px;
    margin-bottom: 24px;
    transition: all 0.3s ease;
}

.download-card:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 8px 32px var(--shadow);
}

.download-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.download-info h3 {
    font-size: 24px;
    margin-bottom: 8px;
}

.download-info p {
    color: var(--text-secondary);
    font-size: 14px;
}

.download-size {
    color: var(--text-tertiary);
    font-size: 14px;
    font-weight: 600;
    background: var(--bg-hover);
    padding: 6px 12px;
    border-radius: 6px;
}

.download-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.btn-download {
    background: var(--accent-primary);
    color: white;
    box-shadow: 0 4px 16px rgba(16, 83, 115, 0.3);
}

.btn-download:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(16, 83, 115, 0.4);
}

.download-meta {
    color: var(--text-tertiary);
    font-size: 13px;
}

/* Installation Section */
.installation {
    padding: 100px 0;
    background: var(--bg-dark);
}

.installation-steps {
    display: grid;
    gap: 32px;
    margin-bottom: 64px;
}

.step {
    display: flex;
    gap: 24px;
    align-items: flex-start;
}

.step-number {
    width: 48px;
    height: 48px;
    background: var(--accent-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 700;
    flex-shrink: 0;
}

.step-content {
    flex: 1;
}

.step-content h3 {
    font-size: 22px;
    margin-bottom: 8px;
}

.step-content p {
    color: var(--text-secondary);
    font-size: 16px;
}

.step-content code {
    background: var(--bg-card);
    padding: 4px 8px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    color: var(--accent-primary);
    border: 1px solid var(--border-color);
}

.hotkeys-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 40px;
}

.hotkeys-title {
    font-size: 28px;
    margin-bottom: 32px;
    text-align: center;
}

.hotkeys-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}

.hotkey-item {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 20px;
    background: var(--bg-hover);
    border-radius: 8px;
    text-align: center;
}

kbd {
    background: var(--bg-dark);
    border: 2px solid var(--border-color);
    border-radius: 6px;
    padding: 8px 16px;
    font-family: 'Courier New', monospace;
    font-weight: 600;
    font-size: 14px;
    color: var(--accent-primary);
    display: inline-block;
}

.hotkey-item span {
    color: var(--text-secondary);
    font-size: 14px;
}

/* FAQ Section */
.faq {
    padding: 100px 0;
    background: var(--bg-dark);
}

.faq-grid {
    display: grid;
    gap: 16px;
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-color: var(--accent-primary);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 32px;
    cursor: pointer;
    -webkit-user-select: none;
    user-select: none;
}

.faq-question h3 {
    font-size: 18px;
    font-weight: 600;
    margin: 0;
}

.faq-icon {
    font-size: 24px;
    color: var(--accent-primary);
    font-weight: 300;
    transition: transform 0.3s ease;
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 32px 24px;
}

.faq-answer p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin: 0;
}

/* CTA Section */
.cta {
    padding: 120px 0;
    background: linear-gradient(135deg, rgba(16, 83, 115, 0.1) 0%, transparent 100%);
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(16, 83, 115, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

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

.cta-content h2 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
}

.cta-content p {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
}

.btn-large {
    padding: 20px 40px;
    font-size: 18px;
}

/* Footer */
.footer {
    background: var(--bg-darker);
    border-top: 1px solid var(--border-color);
    padding: 60px 0 24px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 48px;
    margin-bottom: 48px;
}

.footer-section h4 {
    font-size: 18px;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.footer-section p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
}

.footer-section a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    margin-bottom: 8px;
    transition: color 0.3s ease;
}

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

.disclaimer {
    font-size: 13px;
    line-height: 1.6;
    opacity: 0.7;
}

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    color: var(--text-tertiary);
    font-size: 14px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 42px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

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

    .section-title {
        font-size: 36px;
    }

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

    .nav-links {
        gap: 16px;
        font-size: 14px;
    }

    .download-header {
        flex-direction: column;
        gap: 16px;
    }

    .download-actions {
        flex-direction: column;
        width: 100%;
    }

    .download-actions .btn {
        width: 100%;
    }

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

    .workflow {
        flex-direction: column;
    }

    .workflow-arrow {
        transform: rotate(90deg);
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }

    .cta-content h2 {
        font-size: 32px;
    }

    .cta-content p {
        font-size: 16px;
    }

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

    .btn-large {
        width: 100%;
        padding: 16px 32px;
        font-size: 16px;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Selection */
::selection {
    background: var(--accent-primary);
    color: white;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 12px;
}

::-webkit-scrollbar-track {
    background: var(--bg-darker);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-card);
    border-radius: 6px;
    border: 2px solid var(--bg-darker);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--bg-hover);
}