/* --- General Styles --- */
:root {
    --bg-color: #FFFFFF;
    --text-primary: #03045e;
    --text-secondary: #1d3557;
    --accent-color: #48cae4;
    --light-blue-bg: #caf0f8;
    --border-color: #e0e0e0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 1.1rem; /* Increase base font size */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

#bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
}

.hero, main, footer {
    position: relative;
    z-index: 1;
}

.container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 20px;
}

h1, h2, h3 {
    margin-top: 0;
    line-height: 1.2;
    font-weight: 600;
}

h1 {
    font-size: 2.8rem; /* 40px -> 44.8px */
    letter-spacing: -0.02em;
}

h2 {
    font-size: 2.5rem; /* 32px -> 40px */
    text-align: center;
    margin-bottom: 40px;
}

p {
    margin-top: 0;
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
}

a:hover {
    text-decoration: underline;
}

section {
    padding: 80px 0;
}

/* --- Hero Section --- */
.hero {
    padding: 100px 0;
    text-align: center;
}

.hero .subtitle {
    font-size: 1.35rem; /* 20px -> 21.6px */
    max-width: 700px;
    margin: 20px auto 30px;
    color: var(--text-secondary);
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
}

.cta-primary, .cta-secondary {
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    transition: transform 0.2s ease;
}

.cta-primary {
    background-color: var(--accent-color);
    color: #FFF;
}

.cta-primary:hover {
    transform: translateY(-2px);
    text-decoration: none;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
}

.cta-secondary {
    background-color: var(--bg-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.cta-secondary:hover {
    transform: translateY(-2px);
    text-decoration: none;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.cta-soon {
    opacity: 0.6;
    cursor: not-allowed;
}

.cta-soon:hover {
    transform: none;
    box-shadow: none;
    text-decoration: none;
}

/* --- Demo Section --- */
#demo {
    text-align: center;
}

.caption {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* --- Features Section --- */
.feature-showcase {
    display: flex;
    flex-direction: column;
    gap: 80px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 60px;
}

.feature-item:nth-child(even) {
    flex-direction: row-reverse;
}

.feature-text {
    flex: 1;
}

.feature-image {
    flex: 1;
}

.feature-img {
    max-width: 392px;
    max-height: 280px;
    width: auto;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-color);
    display: block;
    margin: 0 auto;
}

.feature-text h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.icon-container {
    width: 48px;
    height: 48px;
    background-color: var(--light-blue-bg);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 24px;
    border: 1px solid var(--border-color);
}

/* --- Limitations Section --- */
.limitation-box {
    background-color: var(--light-blue-bg);
    padding: 30px;
    border-radius: 12px;
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

/* --- Download Section --- */
#download {
    text-align: center;
}

#download .cta-primary {
    display: inline-block;
    margin-bottom: 15px;
}

#download .small-text {
    font-size: 0.9rem;
    color: #888;
    margin-top: 20px;
}

/* --- Privacy Section --- */
#privacy {
    text-align: center;
}

#privacy ul {
    list-style: none;
    padding: 0;
    display: inline-block;
    text-align: left;
    max-width: 500px;
    margin: 0 auto;
}

#privacy li {
    margin-bottom: 10px;
    padding-left: 25px;
    position: relative;
}

#privacy li::before {
    content: '✓';
    color: var(--accent-color);
    position: absolute;
    left: 0;
    font-weight: 600;
}


/* --- About Section --- */
#about {
    text-align: center;
}

#about .contact-block {
    margin-top: 30px;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

#about .contact-block ul {
    list-style: none;
    padding: 0;
    text-align: left;
}

#about .contact-block li {
    margin-bottom: 8px;
}

/* --- Footer --- */
footer {
    padding: 40px 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

footer p {
    margin: 0;
    font-size: 0.9rem;
    color: #888;
}

/* --- Responsive Styles --- */
@media (min-width: 768px) {
    h1 {
        font-size: 4rem; /* 56px -> 64px */
    }
}

@media (max-width: 768px) {
    .feature-item, .feature-item:nth-child(even) {
        flex-direction: column;
        gap: 30px;
        text-align: center;
    }

    .feature-text {
        order: 2;
    }

    .feature-image {
        order: 1;
    }
    
    .icon-container {
        margin-left: auto;
        margin-right: auto;
    }
}