:root {
    --app-bg: #f5f7fa;
    --app-text: #333333;
    --app-primary: #ff6b6b; /* Vibrant Coral */
    --app-secondary: #4ecdc4; /* Mint */
    --app-card: #ffffff;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    background-color: var(--app-bg); color: var(--app-text);
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    line-height: 1.6; overflow-x: hidden;
}

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

/* Header */
.app-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 20px 0; margin-bottom: 40px;
}
.app-brand {
    font-size: 24px; font-weight: bold; color: var(--app-primary);
    display: flex; align-items: center; gap: 10px;
}
.app-brand::before {
    content: ''; display: inline-block; width: 30px; height: 30px;
    background: linear-gradient(135deg, var(--app-primary), var(--app-secondary));
    border-radius: 8px;
}
.app-nav { display: flex; gap: 25px; }
.app-nav a {
    color: #555; text-decoration: none; font-weight: 500;
    transition: color 0.3s;
}
.app-nav a:hover, .app-nav a.active { color: var(--app-primary); }

/* Hero Section (App Style) */
.app-hero {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 80px; padding: 40px; background: var(--app-card);
    border-radius: 30px; box-shadow: 0 20px 40px rgba(0,0,0,0.05);
}
.app-hero-text { flex: 1; padding-right: 50px; }
.app-hero h1 { font-size: 48px; margin-bottom: 20px; line-height: 1.2; color: #222;}
.app-hero p { font-size: 18px; color: #666; margin-bottom: 30px;}

.app-mockup {
    flex: 0 0 300px; height: 600px; background: #222; border-radius: 40px;
    border: 10px solid #111; position: relative; overflow: hidden;
    box-shadow: 0 25px 50px rgba(0,0,0,0.2);
    display: flex; flex-direction: column;
}
.app-mockup::before {
    content: ''; position: absolute; top: 0; left: 50%; transform: translateX(-50%);
    width: 150px; height: 25px; background: #111; border-bottom-left-radius: 15px; border-bottom-right-radius: 15px;
}
.mockup-screen {
    flex: 1; background: linear-gradient(135deg, #ff9a9e 0%, #fecfef 99%, #fecfef 100%);
    padding: 40px 20px; text-align: center; color: #fff;
}
.mockup-circle {
    width: 120px; height: 120px; border-radius: 50%; background: rgba(255,255,255,0.2);
    margin: 40px auto; display: flex; align-items: center; justify-content: center;
    font-size: 40px; border: 2px solid #fff;
}

.btn-app {
    display: inline-block; padding: 15px 40px; font-size: 18px; font-weight: bold;
    color: #fff; background: var(--app-primary); border-radius: 30px;
    text-decoration: none; transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: 0 10px 20px rgba(255, 107, 107, 0.3);
}
.btn-app:hover { transform: translateY(-3px); box-shadow: 0 15px 25px rgba(255, 107, 107, 0.4); }

/* Features */
.app-features { margin-bottom: 80px; text-align: center;}
.app-features h2 { font-size: 32px; margin-bottom: 50px; color: #222;}
.a-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.a-card {
    background: var(--app-card); padding: 40px 30px; border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.03);
}
.a-icon {
    width: 60px; height: 60px; margin: 0 auto 20px; border-radius: 15px;
    background: rgba(78, 205, 196, 0.1); color: var(--app-secondary);
    display: flex; align-items: center; justify-content: center; font-size: 28px;
}
.a-card h3 { font-size: 20px; margin-bottom: 15px; color: #333;}
.a-card p { font-size: 15px; color: #777;}

/* FAQ */
.app-faq { max-width: 800px; margin: 0 auto 80px; }
.app-faq h2 { font-size: 28px; text-align: center; margin-bottom: 40px; color: #222;}
.a-faq-item {
    background: var(--app-card); margin-bottom: 15px; border-radius: 15px;
    padding: 25px; box-shadow: 0 5px 15px rgba(0,0,0,0.02);
}
.a-fq { font-weight: bold; font-size: 18px; color: var(--app-primary); margin-bottom: 10px;}
.a-fa { color: #666; font-size: 15px;}

footer {
    text-align: center; padding: 40px 0; color: #999; font-size: 14px;
}

@media (max-width: 900px) {
    .app-hero { flex-direction: column; text-align: center; padding: 30px; }
    .app-hero-text { padding-right: 0; margin-bottom: 40px; }
    .app-mockup { display: none; } /* Hide mockup on small screens for simplicity */
    .a-grid { grid-template-columns: 1fr; }
}