:root {
    --bg-color: #050505; /* AMOLED dark */
    --surface-color: rgba(255, 255, 255, 0.03);
    --surface-border: rgba(255, 255, 255, 0.08);
    --primary-color: #FFD54F; /* Flutter seed color */
    --primary-glow: rgba(255, 213, 79, 0.3);
    --text-main: #FFFFFF;
    --text-muted: #A0A0A0;
    --font-family: 'Outfit', sans-serif;
}

body.light-mode {
    --bg-color: #F8F9FA;
    --surface-color: rgba(255, 255, 255, 0.7);
    --surface-border: rgba(0, 0, 0, 0.1);
    --text-main: #1A1A1A;
    --text-muted: #555555;
    --primary-glow: rgba(255, 213, 79, 0.6);
}

body.light-mode .navbar {
    background: rgba(248, 249, 250, 0.7);
}

body.light-mode .navbar.scrolled {
    background: rgba(248, 249, 250, 0.95);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

body.light-mode .footer {
    background: rgba(248, 249, 250, 0.5);
}

body.light-mode .gallery-overlay {
    background: linear-gradient(to top, rgba(255,255,255,0.95), transparent);
    color: #1A1A1A;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

html {
    scroll-behavior: smooth;
}

/* Background blobs for premium dynamic feel */
.blob-bg {
    position: fixed;
    top: -20%;
    left: -10%;
    width: 50vw;
    height: 50vw;
    border-radius: 50%;
    background: radial-gradient(circle, var(--primary-glow) 0%, rgba(5,5,5,0) 70%);
    filter: blur(80px);
    z-index: -1;
    animation: float 20s ease-in-out infinite;
}

.blob-2 {
    top: 50%;
    left: 60%;
    width: 40vw;
    height: 40vw;
    animation: float 25s ease-in-out infinite reverse;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -50px) scale(1.1); }
    66% { transform: translate(-20px, 20px) scale(0.9); }
    100% { transform: translate(0, 0) scale(1); }
}

/* Typography & Layout */
h1 {
    font-size: clamp(3rem, 5vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -1px;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    margin-bottom: 1rem;
}

p {
    font-size: 1.125rem;
    color: var(--text-muted);
    max-width: 600px;
}

.highlight {
    color: var(--primary-color);
    text-shadow: 0 0 20px var(--primary-glow);
}

/* Navigation */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 5%;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
    background: rgba(5, 5, 5, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--surface-border);
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(5, 5, 5, 0.9);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-main);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    background: var(--surface-color);
    color: var(--primary-color);
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-main);
    letter-spacing: 1px;
}

.nav-cta {
    color: var(--text-main);
    text-decoration: none;
    font-weight: 600;
    padding: 0.5rem 1.25rem;
    border: 1px solid var(--surface-border);
    border-radius: 50px;
    transition: all 0.3s ease;
}

.nav-cta:hover {
    background: var(--primary-color);
    color: var(--bg-color);
    border-color: var(--primary-color);
    box-shadow: 0 0 15px var(--primary-glow);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: 50px;
    font-size: 1.125rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, #FFB300 100%);
    color: #000;
    box-shadow: 0 8px 20px rgba(255, 213, 79, 0.3);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn-primary::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(to right, rgba(255,255,255,0) 0%, rgba(255,255,255,0.5) 50%, rgba(255,255,255,0) 100%);
    transform: skewX(-20deg);
    animation: shimmer 3s infinite;
    z-index: -1;
}

@keyframes shimmer {
    0% { left: -100%; }
    15% { left: 200%; }
    100% { left: 200%; }
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 25px rgba(255, 213, 79, 0.5);
}

.btn-secondary {
    background: var(--surface-color);
    color: var(--text-main);
    border: 1px solid var(--surface-border);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-3px);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8rem 5% 4rem;
    gap: 4rem;
    max-width: 1400px;
    margin: 0 auto;
}

.hero-content {
    flex: 1;
}

.hero-buttons {
    margin-top: 2.5rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-image-wrapper {
    flex: 1;
    display: flex;
    justify-content: center;
    position: relative;
}

.hero-mockup {
    max-width: 320px;
    border-radius: 20px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.5), 0 0 0 1px var(--surface-border);
    transform: perspective(1000px) rotateY(-15deg) rotateX(5deg);
    transition: transform 0.5s ease;
}

.hero-mockup:hover {
    transform: perspective(1000px) rotateY(0deg) rotateX(0deg) scale(1.02);
}

/* Features */
.features, .gallery {
    padding: 6rem 5%;
    max-width: 1400px;
    margin: 0 auto;
}

.section-title {
    text-align: center;
    margin-bottom: 4rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

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

.feature-card {
    background: var(--surface-color);
    border: 1px solid var(--surface-border);
    padding: 2.5rem;
    border-radius: 24px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: all 0.4s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(255, 213, 79, 0.1);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    background: rgba(255, 213, 79, 0.1);
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    color: var(--primary-color);
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

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

.gallery-item {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    aspect-ratio: 9/19; /* Phone aspect ratio roughly */
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    border: 1px solid var(--surface-border);
    cursor: pointer;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.gallery-item:hover img {
    transform: scale(1.05);
}

.gallery-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 1.5rem;
    background: linear-gradient(to top, rgba(0,0,0,0.9), transparent);
    color: #fff;
    font-weight: 600;
    transform: translateY(10px);
    opacity: 0;
    transition: all 0.3s ease;
}

.gallery-item:hover .gallery-overlay {
    transform: translateY(0);
    opacity: 1;
}

/* Footer */
.footer {
    border-top: 1px solid var(--surface-border);
    padding: 4rem 5% 2rem;
    margin-top: 4rem;
    background: rgba(5, 5, 5, 0.5);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    text-align: center;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
}

.author-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.author-link:hover {
    text-decoration: underline;
}

.social-links {
    display: flex;
    gap: 1.5rem;
    margin-top: 1rem;
}

.social-links a {
    color: var(--text-muted);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--surface-color);
    border: 1px solid var(--surface-border);
}

.social-links a:hover {
    color: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(255, 213, 79, 0.2);
}

/* Animations */
.section-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.section-reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 992px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 8rem;
    }
    
    .hero-content {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-mockup {
        transform: none;
        max-width: 280px;
    }
    
    .hero-mockup:hover {
        transform: scale(1.02);
    }
}