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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    color: #2d3748;
    line-height: 1.6;
    overflow-x: hidden;
}

/* Screen reader only - visually hidden but accessible to assistive technologies */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Header/Navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    padding: 1rem 0;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: #4a5568;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-link:hover {
    color: #667eea;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 120px 2rem 80px;
    text-align: center;
    color: white;
    margin-top: 70px;
}

.hero-container {
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2.5rem;
    opacity: 0.95;
    line-height: 1.7;
}

.hero-value-props {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
}

.value-prop {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: 0.6rem 1.5rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.hero-cta {
    display: inline-block;
    background: white;
    color: #667eea;
    padding: 18px 50px;
    border-radius: 50px;
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.hero-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* Screenshot Section */
.screenshot-section {
    padding: 80px 2rem;
    background: #f7fafc;
}

.screenshot-container {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #2d3748;
}

.section-subtitle {
    font-size: 1.2rem;
    color: #718096;
    margin-bottom: 3rem;
}

.screenshot-wrapper {
    display: flex;
    justify-content: center;
    margin-top: 2rem;
}

.screenshot-placeholder {
    width: 100%;
    max-width: 800px;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
    border: 1px solid #e2e8f0;
}

/* Features Section */
.features-section {
    padding: 80px 2rem;
    background: white;
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
}

.feature-card {
    text-align: center;
    padding: 2.5rem 2rem;
    background: #f7fafc;
    border-radius: 16px;
    transition: transform 0.2s, box-shadow 0.2s;
    border: 1px solid #e2e8f0;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #2d3748;
}

.feature-description {
    font-size: 1rem;
    color: #718096;
    line-height: 1.7;
}

/* Download Section */
.download-section {
    padding: 80px 2rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
}

.download-container {
    max-width: 600px;
    margin: 0 auto;
}

.download-section .section-title {
    color: white;
    margin-bottom: 1rem;
}

.version-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: 0.5rem 1.2rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.download-note {
    font-size: 1rem;
    opacity: 0.9;
    margin-bottom: 1rem;
}

.download-warning {
    font-size: 0.95rem;
    opacity: 0.95;
    margin-bottom: 2.5rem;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 1rem 1.5rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    line-height: 1.6;
}

.download-form {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.form-group {
    width: 100%;
    max-width: 400px;
}

.email-input {
    width: 100%;
    padding: 16px 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
    background: rgba(255, 255, 255, 0.95);
    color: #2d3748;
}

.email-input:focus {
    border-color: white;
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.2);
}

.email-input::placeholder {
    color: #a0aec0;
}

.download-button {
    display: inline-block;
    background: white;
    color: #667eea;
    padding: 18px 50px;
    border-radius: 50px;
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    border: none;
    cursor: pointer;
    font-family: inherit;
}

.download-button:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.download-button:active:not(:disabled) {
    transform: translateY(0);
}

.download-button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.skip-link {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
    margin-top: 10px;
}

.skip-link:hover {
    color: white;
}

/* Footer */
.footer {
    background: #2d3748;
    color: #a0aec0;
    padding: 2rem;
    text-align: center;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .header-container {
        padding: 0 1.5rem;
    }

    .nav {
        gap: 1rem;
    }

    .nav-link {
        font-size: 0.9rem;
    }

    .hero {
        padding: 100px 1.5rem 60px;
        margin-top: 60px;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .value-prop {
        font-size: 0.85rem;
        padding: 0.5rem 1.2rem;
    }

    .hero-cta {
        padding: 16px 40px;
        font-size: 1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .section-subtitle {
        font-size: 1rem;
    }

    .screenshot-section,
    .features-section,
    .download-section {
        padding: 60px 1.5rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .feature-card {
        padding: 2rem 1.5rem;
    }

    .screenshot-placeholder {
        border-radius: 8px;
    }

    .email-input {
        padding: 14px 18px;
        font-size: 0.95rem;
    }

    .download-button {
        padding: 16px 40px;
        font-size: 1rem;
    }

    .form-group {
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

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

    .value-prop {
        font-size: 0.8rem;
        padding: 0.4rem 1rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .logo {
        font-size: 1.25rem;
    }
}