/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
}

/* Header and Navigation */
header {
    background-color: #fff;
    border-bottom: 1px solid #e5e5e5;
    position: sticky;
    top: 0;
    z-index: 100;
}

nav {
    padding: 0.5rem 0;
}

nav .container {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

/* Hamburger menu button (hidden on desktop) */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 25px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 101;
    position: absolute;
    right: 20px;
}

.hamburger:focus {
    outline: 2px solid #40bfbf;
    outline-offset: 4px;
}

.hamburger-line {
    width: 30px;
    height: 3px;
    background-color: #333;
    transition: all 0.3s ease;
    border-radius: 2px;
}

.hamburger.active .hamburger-line:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.hamburger.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.hamburger.active .hamburger-line:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    margin: 0;
}

.nav-links a {
    color: #333;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: #40bfbf;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #20a0a0 0%, #40bfbf 50%, #60d0d0 100%);
    color: white;
    padding: 4rem 0;
}

.hero-content-wrapper {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
    align-items: center;
}

.hero-logo {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-logo img {
    height: 200px;
    width: auto;
    filter: drop-shadow(0 8px 16px rgba(0,0,0,0.2));
}

.hero-text {
    text-align: left;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    background-color: #fff;
    color: #20a0a0;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 600;
    transition: all 0.3s;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.15);
    background-color: #f0f0f0;
}

.btn-secondary {
    background-color: white;
    color: #20a0a0;
    border: 2px solid white;
}

/* Demo and Download Section */
.demo-download {
    background-color: #fff;
    padding: 4rem 0;
}

.demo-download-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.demo-screenshot img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.download-content {
    text-align: center;
}

.download-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: #333;
}

.download-content .version {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: #666;
}

.download-content .requirements {
    background-color: #fff3cd;
    border: 1px solid #ffc107;
    border-radius: 5px;
    padding: 1rem;
    margin: 2rem 0;
}

.download-content .requirements h4 {
    color: #856404;
    margin-bottom: 0.5rem;
}

.download-content .requirements ul {
    list-style: none;
    color: #856404;
}

.download-content .requirements li:before {
    content: "• ";
    font-weight: bold;
}

/* Features Section */
.features {
    padding: 4rem 0;
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #333;
}

.feature-detail {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-bottom: 4rem;
    background-color: #fff;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    align-items: start;
}

.feature-detail:nth-child(even) .feature-content {
    order: 2;
}

.feature-detail:nth-child(even) .feature-image {
    order: 1;
}

.feature-content h3 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
    color: #20a0a0;
}

.feature-content p {
    color: #555;
    margin-bottom: 1rem;
    line-height: 1.8;
}

.feature-content ul {
    margin-left: 1.5rem;
    color: #555;
    line-height: 1.8;
}

.feature-content ul li {
    margin-bottom: 0.5rem;
}

.feature-image img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature {
    background-color: #fff;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0,0,0,0.1);
}

.feature h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #20a0a0;
}

.feature p {
    color: #666;
}

/* About Section */
.about {
    background-color: #fff;
    padding: 4rem 0;
}

.about h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: #333;
}

.about p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 1rem;
    color: #555;
}

.about .attribution {
    background-color: #f8f9fa;
    border-left: 4px solid #20a0a0;
    padding: 1.5rem;
    margin-top: 1rem;
    margin-bottom: 1rem;
    border-radius: 5px;
}

.about .attribution h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: #333;
}

.about .attribution p {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.product-link {
    color: inherit;
    text-decoration: none;
    border-bottom: 1px dashed currentColor;
}

.product-link:hover {
    border-bottom-style: solid;
}

/* FAQ Section */
.faq {
    background-color: #fff;
    padding: 4rem 0;
}

.faq h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #333;
}

.faq-section {
    margin-bottom: 3rem;
}

.faq-section h3 {
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    color: #20a0a0;
    border-bottom: 2px solid #20a0a0;
    padding-bottom: 0.5rem;
}

.faq-item {
    margin-bottom: 1rem;
    background-color: #f8f9fa;
    border-radius: 8px;
    border-left: 4px solid #20a0a0;
    overflow: hidden;
}

.faq-question {
    font-size: 1.25rem;
    margin: 0;
    padding: 1.5rem;
    color: #333;
    cursor: pointer;
    user-select: none;
    display: flex;
    justify-content: flex-start;
    align-items: center;
    transition: background-color 0.3s;
}

.faq-question:hover {
    background-color: #e9ecef;
}

.faq-icon {
    font-size: 0.8rem;
    transition: transform 0.3s;
    color: #20a0a0;
    flex-shrink: 0;
    margin-right: 1rem;
}

.faq-item.active .faq-icon {
    transform: rotate(90deg); /* Rotate right arrow down */
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s linear, padding 0.3s linear;
    padding: 0 1.5rem;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 1rem 1.5rem 1.5rem 1.5rem;
}

.faq-answer p {
    color: #555;
    line-height: 1.8;
    margin: 0;
}

.faq-answer a {
    color: #20a0a0;
    text-decoration: none;
    font-weight: 500;
}

.faq-answer a:hover {
    text-decoration: underline;
}

/* Donate Section */
.donate {
    background-color: #f5f5f5;
    padding: 4rem 0;
    text-align: center;
}

.donate h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: #333;
}

.donate p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #555;
    max-width: 700px;
    margin: 0 auto 1rem;
}

.donate a:not(.btn) {
    color: #20a0a0;
    text-decoration: none;
    font-weight: 500;
}

.donate a:not(.btn):hover {
    text-decoration: underline;
}

/* Footer */
footer {
    background-color: #333;
    color: #fff;
    padding: 2rem 0;
    text-align: center;
}

footer a {
    color: #40bfbf;
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
    /* Make header transparent and overlay content on mobile */
    header {
        background-color: transparent;
        border-bottom: none;
        position: absolute;
        width: 100%;
    }

    /* Hamburger menu for mobile */
    .hamburger {
        display: flex;
        border: 2px solid white;
        border-radius: 8px;
        padding: 8px;
        background-color: rgba(255, 255, 255, 0.1);
        width: auto;
        height: auto;
        gap: 5px;
        justify-content: center;
        top: 20px;
        right: 20px;
    }

    /* Make hamburger lines white */
    .hamburger-line {
        background-color: white;
    }

    /* Change hamburger lines to dark when menu is active */
    .hamburger.active .hamburger-line {
        background-color: #333;
    }

    nav .container {
        justify-content: center;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        max-width: 300px;
        height: 100vh;
        background-color: #fff;
        flex-direction: column;
        padding: 80px 0 20px;
        gap: 0;
        box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
        transition: right 0.3s ease;
        overflow-y: auto;
    }

    .nav-links.active {
        right: 0;
    }

    .nav-links li {
        width: 100%;
        border-bottom: 1px solid #e5e5e5;
    }

    .nav-links a {
        display: block;
        padding: 1.25rem 2rem;
        font-size: 1.1rem;
    }

    .nav-links a:hover {
        background-color: #f5f5f5;
    }

    .hero-content-wrapper {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }

    .hero-text {
        text-align: center;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .hero-logo img {
        height: 120px;
    }

    .hero-buttons {
        justify-content: center;
    }

    .demo-download-wrapper {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .feature-detail {
        grid-template-columns: 1fr !important;
        gap: 1.5rem;
    }

    .feature-detail:nth-child(even) .feature-content,
    .feature-detail:nth-child(even) .feature-image {
        order: 0;
    }

    .features h2, .about h2, .faq h2 {
        font-size: 2rem;
    }

    .download-content h2 {
        font-size: 2rem;
    }

    .faq-section h3 {
        font-size: 1.5rem;
    }

    .faq-question {
        font-size: 1.1rem;
    }
}

/* Larger screens - more breathing room */
@media (min-width: 1024px) {
    .container {
        padding: 0 60px;
    }
}