:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --gradient-start: #3b82f6;
    --gradient-end: #8b5cf6;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.background-glow {
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at center, rgba(59, 130, 246, 0.15) 0%, transparent 50%);
    z-index: -1;
    pointer-events: none;
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 5%;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.navbar .logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.navbar .logo i {
    color: var(--accent);
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--accent);
}

.nav-links .github-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Hero Section */
.hero {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 6rem 5% 4rem;
    position: relative;
}

@media (min-width: 900px) {
    .hero {
        flex-direction: row;
        text-align: left;
        justify-content: space-between;
        padding: 8rem 5%;
    }

    .hero-content {
        max-width: 50%;
    }

    .hero-visual {
        max-width: 45%;
        width: 100%;
    }
}

.badge {
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent);
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    display: inline-block;
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.gradient-text {
    background: linear-gradient(to right, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 600px;
}

.cta-group {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

@media (min-width: 900px) {
    .cta-group {
        justify-content: flex-start;
    }
}

.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s;
}

.btn-primary {
    background: var(--accent);
    color: white;
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* Mockup CSS art */
.hero-visual {
    margin-top: 3rem;
    perspective: 1000px;
}

@media (min-width: 900px) {
    .hero-visual {
        margin-top: 0;
    }
}

.app-mockup {
    background: var(--card-bg);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    overflow: hidden;
    transform: rotateY(-5deg) rotateX(5deg);
    transition: transform 0.5s;
    /* aspect-ratio: 16/10; Removed to let image define height */
    position: relative;
    max-width: 100%;
}

.screenshot-img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 0 0 12px 12px;
    /* Bottom corners rounded */
}

/* Fallback for when image is missing/loading (managed by JS onerror roughly, but CSS backup) */
.screenshot-img:not([src]) {
    min-height: 400px;
    background: #1e293b;
    display: flex;
    align-items: center;
    justify-content: center;
}

.app-mockup:hover {
    transform: rotateY(0) rotateX(0);
}

/* Removed Mockup CSS Art styles */


/* Features Section */
.features {
    padding: 6rem 5%;
    text-align: center;
}

.features h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.section-desc {
    color: var(--text-secondary);
    margin-bottom: 4rem;
    font-size: 1.1rem;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: transform 0.3s, box-shadow 0.3s;
    text-align: left;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    border-color: rgba(59, 130, 246, 0.3);
}

.icon-box {
    width: 50px;
    height: 50px;
    background: rgba(59, 130, 246, 0.1);
    border-radius: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 1.5rem;
}

.icon-box i {
    font-size: 1.5rem;
    color: var(--accent);
}

.feature-card h3 {
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Tech Stack */
.tech-stack {
    padding: 4rem 5%;
    background: rgba(255, 255, 255, 0.02);
    text-align: center;
}

.tech-stack h2 {
    margin-bottom: 3rem;
}

.tech-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 3rem;
}

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.tech-item i {
    font-size: 3rem;
    transition: transform 0.3s;
}

.tech-item:hover i {
    transform: scale(1.1);
}

.tech-item span {
    font-weight: 500;
    color: var(--text-secondary);
}

/* Gallery Section */
.gallery {
    padding: 6rem 5%;
    text-align: center;
    background: var(--bg-color);
}

.gallery h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.gallery-item {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    cursor: pointer;
}

.gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    border-color: var(--accent);
}

.gallery-item img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.5s;
}

.gallery-item:hover img {
    transform: scale(1.02);
}

.gallery-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(15, 23, 42, 0.9);
    padding: 1rem;
    transform: translateY(100%);
    transition: transform 0.3s;
    font-weight: 500;
}

.gallery-item:hover .gallery-caption {
    transform: translateY(0);
}

@media (max-width: 768px) {
    .gallery-grid {
        grid-template-columns: 1fr;
    }
}

/* Footer */
footer {
    padding: 2rem 5%;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 2rem;
}

.footer-links i {
    color: var(--text-secondary);
    font-size: 1.25rem;
    transition: color 0.2s;
}

.footer-links i:hover {
    color: var(--text-primary);
}

@media (max-width: 600px) {
    footer {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}