@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700&display=swap');

:root {
    --bg-color: #f7f9fc;
    --card-bg-color: #ffffff;
    --primary-accent-color: #0052ff;
    --text-color: #1d2a3b;
    --text-muted-color: #6a737d;
    --shadow-color: rgba(0, 82, 255, 0.1);
    --border-color: #e1e4e8;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
}

/* --- Navbar --- */
.navbar {
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 4px rgba(0,0,0,0.02);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--primary-accent-color) !important;
}

.nav-link {
    font-weight: 600;
    color: var(--text-muted-color) !important;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: var(--primary-accent-color) !important;
}

/* --- Hero Section --- */
.hero-section {
    background-color: var(--bg-color);
    padding: 140px 0;
    animation: fadeIn 0.5s ease-out;
}

.hero-section .display-4 {
    color: var(--text-color);
    font-weight: 700;
}

.hero-section .lead {
    color: var(--text-muted-color);
    max-width: 600px;
    margin: 1.5rem auto;
    font-size: 1.2rem;
    line-height: 1.6;
}

.app-store-btn {
    background-image: linear-gradient(45deg, #0052ff, #007bff);
    color: #fff;
    font-weight: 600;
    padding: 16px 36px;
    border-radius: 12px;
    border: none;
    transition: transform 0.2s ease, box-shadow 0.3s ease;
}

.app-store-btn:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px var(--shadow-color);
    color: #fff;
}

.app-store-btn_2 {
    background-image: linear-gradient(45deg, white, #e6f0ff);
    color: #fff;
    font-weight: 600;
    padding: 16px 36px;
    border-radius: 12px;
    border: none;
    transition: transform 0.2s ease, box-shadow 0.3s ease;
}

.app-store-btn_2:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px var(--shadow-color);
    color: #dfdfdf;
}

.hero-screenshot {
    margin-top: 5rem;
    border-radius: 1rem;
    box-shadow: 0 30px 60px -15px rgba(0,0,0,0.25);
}

/* --- Sections --- */
.section-header {
    animation: fadeIn 0.5s ease-out;
}

#features, #screenshots {
    padding: 100px 0;
}

.feature-card, .screenshot-item {
    animation: fadeIn 0.8s ease-out;
}

.feature-card {
    background-color: var(--card-bg-color);
    padding: 30px;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    height: 100%;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 30px -10px var(--shadow-color);
}

.feature-icon {
    font-size: 2.5rem;
    color: var(--primary-accent-color);
    background-color: #e6f0ff;
    padding: 15px;
    border-radius: 12px;
    display: inline-block;
}

#screenshots {
    background-color: var(--card-bg-color);
}

.screenshot-item {
    border-radius: 12px;
    box-shadow: 0 10px 20px -5px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.screenshot-item:hover {
    transform: scale(1.05) rotate(1deg);
    box-shadow: 0 15px 30px -5px rgba(0,0,0,0.15);
}

/* --- CTA Section --- */
.cta-section {
    background-image: linear-gradient(45deg, #0052ff, #007bff);
    padding: 80px 0;
}

.cta-section .btn-light {
    background-color: #fff;
    color: var(--primary-accent-color);
    font-weight: 700;
}

/* --- Footer --- */
footer {
    background-color: var(--card-bg-color);
    border-top: 1px solid var(--border-color);
    padding: 30px 0;
}

footer a {
    color: var(--text-muted-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

footer a:hover {
    color: var(--primary-accent-color);
}