:root {
    --bg-color: #ffffff;
    --text-color: #1a1a1a;
    --text-secondary: #666666;
    --border-color: #eeeeee;
    --card-bg: #f8f9fa;
    --primary-color: #25D366;
    --feature-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
    --bg-color: #1a1a1a;
    --text-color: #ffffff;
    --text-secondary: #cccccc;
    --border-color: #333333;
    --card-bg: #2a2a2a;
    --feature-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    justify-content: space-between;
    text-align: center;
}

.content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
}

.logo {
    max-width: 200px;
    margin-bottom: 1rem;
}

.logo img {
    width: 100%;
    height: auto;
}

.app-stores {
    display: flex;
    gap: 1rem;
    margin: 1rem 0;
}

.store-button {
    transition: transform 0.2s ease;
}

.store-button:hover {
    transform: translateY(-2px);
}

.store-button img {
    height: 48px;
    width: auto;
}

h1 {
    font-size: 2rem;
    font-weight: 700;
    margin: 1rem 0;
}

.description {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

footer {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 1rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

.support-email {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.support-email a {
    color: var(--primary-color);
    text-decoration: none;
}

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

.copyright {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

@media (max-width: 600px) {
    .container {
        padding: 1rem;
    }

    h1 {
        font-size: 1.5rem;
    }

    .description {
        font-size: 1rem;
    }

    .app-stores {
        flex-direction: column;
        align-items: center;
    }

    .footer-links {
        flex-direction: column;
        gap: 1rem;
    }
}

.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-color);
    z-index: 1000;
}

.theme-toggle:hover {
    background-color: rgba(128, 128, 128, 0.2);
}

.theme-toggle svg {
    width: 24px;
    height: 24px;
    stroke-width: 2px;
}

.theme-toggle .sun {
    display: none;
}

.theme-toggle .moon {
    display: block;
}

[data-theme="dark"] .theme-toggle .sun {
    display: block;
}

[data-theme="dark"] .theme-toggle .moon {
    display: none;
}

.store-img {
    height: 48px;
    width: auto;
    filter: var(--store-img-filter);
}

[data-theme="dark"] .store-img {
    filter: brightness(0.8) invert(1);
}

.features {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
    margin: 3rem 0;
}

.feature-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    transition: transform 0.3s ease;
    box-shadow: var(--feature-shadow);
    flex: 1 1 45%;
    max-width: 45%;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    color: var(--text-color);
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
}