:root {
    --primary: #007AFF; /* iOS Blue */
    --secondary: #F2F2F7;
    --text: #1C1C1E;
    --light-text: #8E8E93;
    --white: #FFFFFF;
    --border-radius: 12px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; line-height: 1.6; color: var(--text); background: var(--white); }

/* Layout */
.container { max-width: 960px; margin: 0 auto; padding: 0 20px; }
header { padding: 20px 0; border-bottom: 1px solid var(--secondary); }
nav { display: flex; justify-content: space-between; align-items: center; }
.logo { font-weight: 700; font-size: 1.5rem; color: var(--text); text-decoration: none; }
.lang-switch a { margin-left: 10px; text-decoration: none; color: var(--light-text); font-weight: 600; }
.lang-switch a.active { color: var(--primary); }

/* Hero Section */
.hero { text-align: center; padding: 80px 20px; background: linear-gradient(180deg, #F2F2F7 0%, #FFFFFF 100%); }
.hero h1 { font-size: 2.5rem; margin-bottom: 20px; line-height: 1.2; }
.hero p { font-size: 1.2rem; color: var(--light-text); margin-bottom: 30px; max-width: 600px; margin-left: auto; margin-right: auto; }
.app-store-btn img { height: 50px; transition: transform 0.2s; }
.app-store-btn:hover img { transform: scale(1.05); }

/* Mockup */
.mockup-container { margin-top: 40px; display: flex; justify-content: center; }
.mockup { max-width: 900px; width: 100%;  border-radius: 16px;  }

/* Features */
.features { padding: 0 0 60px 0; }
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 30px; margin-top: 40px; }
.feature-card { background: var(--secondary); padding: 30px; border-radius: var(--border-radius); }
.feature-card h3 { margin-bottom: 10px; color: var(--primary); }

/* SEO Content Area */
.seo-content { padding: 60px 0; background: #fafafa; border-top: 1px solid #eee; }
.seo-content h2 { font-size: 2rem; margin-bottom: 20px; }
.seo-content h3 { font-size: 1.5rem; margin-top: 30px; margin-bottom: 10px; }
.seo-content ul { margin-left: 20px; margin-bottom: 20px; }
.seo-content li { margin-bottom: 10px; }

/* Footer */
footer { padding: 40px 0; text-align: center; color: var(--light-text); font-size: 0.9rem; border-top: 1px solid var(--secondary); margin-top: 40px; }
footer a { color: var(--light-text); text-decoration: none; margin: 0 10px; }

/* Mobile */
@media (max-width: 600px) {
    .hero h1 { font-size: 2rem; }
    .features-grid { grid-template-columns: 1fr; }
}