/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background-color: #fff;
    border-bottom: 1px solid #e5e7eb;
    padding: 20px 0;
}

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

.logo h1 {
    font-size: 24px;
    font-weight: 600;
    color: #1f2937;
    margin: 0;
}

.logo .byline {
    font-size: 12px;
    color: #6b7280;
    font-weight: 500;
    margin: 4px 0 0 0;
}

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

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

.hero h2 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.subtitle {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.95;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

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

.button {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.2s;
}

.button.primary {
    background-color: white;
    color: #667eea;
}

.button.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.button.secondary {
    background-color: transparent;
    color: white;
    border: 2px solid white;
}

.button.secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* Features section */
.features {
    padding: 80px 0;
    background-color: #f9fafb;
}

.features h3 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: #1f2937;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.feature-card h4 {
    font-size: 20px;
    margin-bottom: 12px;
    color: #1f2937;
}

.feature-card p {
    color: #6b7280;
    line-height: 1.6;
}

/* How it works section */
.how-it-works {
    padding: 80px 0;
}

.how-it-works h3 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: #1f2937;
}

.problem-solution {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.problem, .solution {
    padding: 30px;
    border-radius: 12px;
}

.problem {
    background-color: #fef2f2;
    border-left: 4px solid #ef4444;
}

.solution {
    background-color: #f0fdf4;
    border-left: 4px solid #10b981;
}

.problem h4, .solution h4 {
    font-size: 24px;
    margin-bottom: 16px;
}

.technical-details {
    background-color: #f3f4f6;
    padding: 24px;
    border-radius: 8px;
    margin-top: 30px;
}

.technical-details code {
    background-color: #e5e7eb;
    padding: 2px 8px;
    border-radius: 4px;
    font-family: "Monaco", "Courier New", monospace;
    font-size: 14px;
}

/* Privacy section */
.privacy {
    padding: 80px 0;
    background-color: #f9fafb;
}

.privacy h3 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: #1f2937;
}

.privacy-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.privacy-item {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.privacy-item h4 {
    font-size: 20px;
    margin-bottom: 16px;
    color: #1f2937;
}

.privacy-item ul {
    list-style: none;
}

.privacy-item li {
    padding: 8px 0;
    color: #4b5563;
}

/* Permissions section */
.permissions {
    padding: 80px 0;
}

.permissions h3 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: #1f2937;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

thead {
    background-color: #667eea;
    color: white;
}

th, td {
    padding: 16px;
    text-align: left;
}

tbody tr {
    border-bottom: 1px solid #e5e7eb;
}

tbody tr:last-child {
    border-bottom: none;
}

tbody tr:hover {
    background-color: #f9fafb;
}

td code {
    background-color: #f3f4f6;
    padding: 2px 8px;
    border-radius: 4px;
    font-family: "Monaco", "Courier New", monospace;
    font-size: 14px;
}

/* OAuth disclosure section */
.oauth-disclosure {
    padding: 80px 0;
    background-color: #fffbeb;
    border-top: 2px solid #fbbf24;
    border-bottom: 2px solid #fbbf24;
}

.oauth-disclosure h3 {
    font-size: 32px;
    margin-bottom: 24px;
    color: #1f2937;
}

.oauth-disclosure p {
    margin-bottom: 16px;
    line-height: 1.8;
    color: #374151;
}

.oauth-disclosure ul {
    margin-left: 24px;
    margin-bottom: 16px;
}

.oauth-disclosure li {
    margin-bottom: 8px;
    color: #374151;
}

/* Support section */
.support {
    padding: 80px 0;
}

.support h3 {
    font-size: 32px;
    margin-bottom: 24px;
    color: #1f2937;
}

.support p {
    margin-bottom: 16px;
    color: #4b5563;
}

.support ul {
    list-style: none;
}

.support li {
    padding: 8px 0;
}

.support a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
}

.support a:hover {
    text-decoration: underline;
}

/* Footer */
footer {
    background-color: #1f2937;
    color: #9ca3af;
    padding: 40px 0;
    text-align: center;
}

footer p {
    margin-bottom: 12px;
}

footer a {
    color: #9ca3af;
    text-decoration: none;
    margin: 0 12px;
}

footer a:hover {
    color: white;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h2 {
        font-size: 32px;
    }

    .subtitle {
        font-size: 18px;
    }

    .features h3,
    .how-it-works h3,
    .privacy h3,
    .permissions h3 {
        font-size: 28px;
    }

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

    .button {
        width: 100%;
        max-width: 300px;
    }

    table {
        font-size: 14px;
    }

    th, td {
        padding: 12px;
    }
}