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

:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #2a2a2a;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-tertiary: #808080;
    --accent-primary: #4a9eff;
    --accent-hover: #6bb0ff;
    --border-color: #333333;
    --shadow: rgba(0, 0, 0, 0.5);
}

html {
    scroll-behavior: smooth;
}

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

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

.header {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-primary);
    transition: opacity 0.3s ease;
}

.logo:hover {
    opacity: 0.8;
}

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

.logo span {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.nav {
    display: flex;
    align-items: center;
    gap: 2rem;
}

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

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

.language-dropdown {
    position: relative;
}

.nav-appstore img {
    height: 34px;
    width: auto;
    transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-appstore:hover img {
    transform: translateY(-1px);
    opacity: 0.9;
}

.language-select {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.language-select:hover {
    border-color: var(--accent-primary);
}

.language-select:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.hero {
    padding: 80px 0 100px;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

.app-store-button {
    display: inline-block;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.app-store-button:hover {
    transform: translateY(-2px);
    opacity: 0.9;
}

.app-store-button img {
    height: 50px;
    width: auto;
}

.features {
    padding: 80px 0;
    background-color: var(--bg-primary);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 4rem;
    color: var(--text-primary);
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 6rem;
    margin-bottom: 8rem;
    transition: opacity 0.3s ease;
}

.feature-item:last-child {
    margin-bottom: 0;
}

.feature-item.reverse {
    flex-direction: row-reverse;
}

.feature-content {
    flex: 1;
}

.feature-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    line-height: 1.3;
}

.feature-description {
    font-size: 1.15rem;
    color: var(--text-secondary);
    line-height: 1.9;
}

.feature-image {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.feature-image img {
    max-width: 100%;
    height: auto;
    max-height: 600px;
    border-radius: 20px;
    border: 1px solid #ffffff13;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-image img:hover {
    transform: scale(1.02);
    box-shadow: 0 25px 70px rgba(0, 0, 0, 0.6);
}

.privacy-policy {
    padding: 60px 0 80px;
    background-color: var(--bg-primary);
}

.page-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.last-updated {
    font-size: 1rem;
    color: var(--text-tertiary);
    margin-bottom: 2rem;
}

.privacy-content {
    max-width: 900px;
}

.intro {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

.privacy-section {
    margin-bottom: 3rem;
}

.privacy-section h2 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 1.2rem;
    color: var(--text-primary);
}

.privacy-section p {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 1.2rem;
}

.privacy-section ul {
    margin-left: 2rem;
    margin-bottom: 1.2rem;
}

.privacy-section li {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 0.7rem;
}

.footnote {
    font-style: italic;
    color: var(--text-tertiary);
    font-size: 0.95rem;
}

.contact-email {
    font-size: 1.1rem;
    margin-top: 0.5rem;
}

.contact-email a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-email a:hover {
    color: var(--accent-hover);
}

.footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    margin-top: 4rem;
}

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

.copyright {
    color: var(--text-secondary);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.copyright-brand {
    color: var(--text-primary);
}

.copyright-rights {
    color: rgba(255, 255, 255, 0.6);
}

.support-email {
    color: var(--accent-primary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.support-email:hover {
    color: var(--accent-hover);
}

@media (max-width: 968px) {
    .hero-title {
        font-size: 3rem;
    }

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

    .feature-item,
    .feature-item.reverse {
        flex-direction: column;
        gap: 2rem;
    }

    .feature-image img {
        max-height: 400px;
    }

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

    .feature-title {
        font-size: 1.5rem;
    }
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }

    .nav {
        flex-direction: column;
        gap: 1rem;
        width: 100%;
        align-items: flex-start;
    }

    .language-select {
        width: 100%;
    }

    .nav-appstore {
        width: 100%;
        display: flex;
        justify-content: flex-start;
    }

    .nav-appstore img {
        height: 40px;
    }

    .hero {
        padding: 60px 0 80px;
    }

    .hero-title {
        font-size: 2.4rem;
    }

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

    .features {
        padding: 60px 0;
    }

    .feature-item {
        margin-bottom: 4rem;
        gap: 3rem;
    }

    .feature-item.image-first {
        flex-direction: column-reverse;
    }

    .footer-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

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

}

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

    .hero-subtitle {
        font-size: 0.95rem;
    }

    .app-store-button img {
        height: 40px;
    }

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

    .feature-title {
        font-size: 1.3rem;
    }

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

    .feature-image img {
        max-height: 350px;
    }
}