:root {
    --primary-color: #f59e0b; /* Golden yellow */
    --primary-hover: #d97706;
    --primary-gradient: linear-gradient(to right, #fde047, #f59e0b);
    --bg-color: #f1f5f9;
    --card-bg: #ffffff;
    --text-dark: #0f172a;
    --text-muted: #64748b;
    --item-bg: #f8fafc;
}

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

body {
    font-family: 'Outfit', sans-serif;
    /* Darker background for desktop to make the mobile view container stand out */
    background-color: #334155; 
    display: flex;
    justify-content: center;
    min-height: 100vh;
}

/* Constrain the entire site to a mobile-width column */
.mobile-container {
    width: 100%;
    max-width: 480px;
    background-color: var(--bg-color);
    min-height: 100vh;
    position: relative;
    display: flex;
    flex-direction: column;
    box-shadow: 0 0 30px rgba(0,0,0,0.5);
}

.top-section {
    background-color: var(--card-bg);
    padding-bottom: 1.5rem;
    border-bottom-left-radius: 24px;
    border-bottom-right-radius: 24px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.03);
    margin-bottom: 1.5rem;
}

.app-branding {
    text-align: center;
    padding: 2.5rem 1rem 1.5rem;
}

.app-branding h1 {
    font-size: 3rem;
    font-weight: 900;
    color: var(--text-dark);
    letter-spacing: -1px;
    position: relative;
    display: inline-block;
    z-index: 1;
}

.logo-circle {
    position: absolute;
    width: 65px;
    height: 65px;
    background-color: #fbbf24; /* Yellow circle */
    border-radius: 50%;
    top: 50%;
    left: -15px;
    transform: translateY(-50%);
    z-index: -1;
}

.app-branding h1 span:not(.logo-circle) {
    font-weight: 300; /* Making the 777 lighter like the image */
    color: var(--text-dark);
}

.app-branding p {
    color: var(--text-muted);
    font-weight: 500;
    font-size: 1.1rem;
}

.top-download-section {
    padding: 0 1.5rem;
}

.btn-primary {
    display: block;
    width: 100%;
    background: var(--primary-gradient);
    color: #334155; /* Dark blue/grey text for contrast */
    text-align: center;
    padding: 1.1rem;
    border-radius: 20px; /* More rounded like the image */
    text-decoration: none;
    font-weight: 800;
    font-size: 1.25rem;
    box-shadow: 0 6px 20px rgba(245, 158, 11, 0.35);
    transition: transform 0.1s ease, filter 0.2s ease;
    border: none;
}

.btn-primary:active {
    transform: scale(0.97);
    filter: brightness(0.9);
}

.features-list {
    background-color: var(--card-bg);
    margin: 0 1.5rem;
    border-radius: 20px;
    padding: 1.5rem;
    box-shadow: 0 4px 10px rgba(0,0,0,0.03);
}

.features-title {
    text-align: center;
    font-size: 1.2rem;
    font-weight: 900;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    letter-spacing: 0.5px;
}

.feature-item {
    display: flex;
    align-items: center;
    padding: 1.1rem;
    background-color: var(--item-bg);
    margin-bottom: 0.75rem;
    border-radius: 12px;
    font-weight: 600;
    color: var(--text-dark);
    border: 1px solid #e2e8f0;
}

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

.feature-item .icon {
    font-size: 1.4rem;
    margin-right: 1rem;
}

.bottom-spacer {
    flex-grow: 1;
    min-height: 140px;
}

/* Fixed section at the bottom of the mobile view */
.bottom-download-section {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-top-left-radius: 24px;
    border-top-right-radius: 24px;
    box-shadow: 0 -5px 20px rgba(0,0,0,0.08);
}

.footer-text {
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 1rem;
    font-weight: 500;
}