/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&display=swap');

/* CSS Variables for Material 3 Expressive Theming */
:root[data-theme="light"] {
    --bg-color: #f8fafd;
    --surface-color: #ffffff;
    --surface-variant: #e1e2ec;
    --text-color: #1a1c1e;
    --text-secondary: #43474e;
    --primary-color: #4b5be4; /* Indigo/Purple inspired by DeepSense */
    --primary-hover: #3d4dc4;
    --primary-light: #dfe0ff;
    --border-color: #e0e2ec;
    --shadow-color: rgba(0, 0, 0, 0.05);
    
    --glass-bg: rgba(255, 255, 255, 0.8);
    --glass-border: rgba(255, 255, 255, 0.5);
}

:root[data-theme="dark"] {
    --bg-color: #0c0f14;
    --surface-color: #161a23;
    --surface-variant: #282d38;
    --text-color: #e2e2e6;
    --text-secondary: #a8abb3;
    --primary-color: #8c9eff;
    --primary-hover: #b4c2ff;
    --primary-light: #2d316b;
    --border-color: #2c313d;
    --shadow-color: rgba(0, 0, 0, 0.5);
    
    --glass-bg: rgba(22, 26, 35, 0.8);
    --glass-border: rgba(255, 255, 255, 0.05);
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color 0.4s ease, color 0.4s ease;
    overflow-x: hidden;
}

h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

a {
    text-decoration: none;
    color: inherit;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 5%;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: 1rem 0;
    z-index: 1000;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
}

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

.nav-links a:not(.btn) {
    font-weight: 500;
    position: relative;
    transition: color 0.3s;
}

.nav-links a:not(.btn):hover {
    color: var(--primary-color);
}

.theme-btn {
    background: none;
    border: none;
    font-size: 1.2rem;
    color: var(--text-color);
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s;
}

.theme-btn:hover {
    background: var(--surface-variant);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 1.75rem;
    border-radius: 30px;
    font-weight: 600;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-primary {
    background-color: var(--primary-color);
    color: #ffffff;
    box-shadow: 0 4px 14px var(--shadow-color);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    color: #ffffff;
}

.btn-secondary {
    background-color: var(--primary-light);
    color: var(--primary-hover);
}

.btn-secondary:hover {
    background-color: var(--surface-variant);
}

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px; /* Offset for navbar */
    position: relative;
    overflow: hidden;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.badge {
    display: inline-block;
    padding: 0.4rem 1rem;
    background-color: var(--primary-light);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.hero-text h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    letter-spacing: -1px;
}

.highlight {
    color: var(--primary-color);
}

.hero-text p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 90%;
}

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

.hero-image {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.blob-bg {
    position: absolute;
    width: 450px;
    height: 450px;
    background: linear-gradient(135deg, var(--primary-color), var(--surface-variant));
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    animation: blob-bounce 8s infinite alternate;
    z-index: -1;
    opacity: 0.7;
    filter: blur(40px);
}

@keyframes blob-bounce {
    0% { border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%; transform: rotate(0deg); }
    100% { border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%; transform: rotate(45deg); }
}

.mockup {
    max-height: 650px;
    border-radius: 32px;
    box-shadow: 0 25px 50px var(--shadow-color);
    border: 8px solid var(--surface-color);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-15px); }
    100% { transform: translateY(0px); }
}

/* Sections */
.section {
    padding: 6rem 0;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 4rem auto;
}

.section-header h2 {
    font-size: 2.5rem;
}

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

.bg-secondary {
    background-color: var(--surface-variant);
    border-radius: 40px;
    margin: 0 2%;
    padding: 5rem 0;
}

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

.feature-card {
    background-color: var(--surface-color);
    padding: 2.5rem;
    border-radius: 24px;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 6px var(--shadow-color);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px var(--shadow-color);
    border-color: var(--primary-color);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background-color: var(--primary-light);
    color: var(--primary-color);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    font-size: 1.4rem;
}

.feature-card p {
    color: var(--text-secondary);
}

/* Use Case Split */
.usecase-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.usecase-image img {
    width: 100%;
    max-width: 400px;
    border-radius: 24px;
    box-shadow: 0 20px 40px var(--shadow-color);
    margin: 0 auto;
    display: block;
}

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

.check-list {
    list-style: none;
    margin-top: 2rem;
}

.check-list li {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.check-list i {
    color: var(--primary-color);
    font-size: 1.2rem;
}

/* Carousel Section */
.carousel-container {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.carousel-track {
    display: flex;
    gap: 20px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
    padding: 1rem;
    -ms-overflow-style: none;  /* IE and Edge */
    scrollbar-width: none;  /* Firefox */
}

.carousel-track::-webkit-scrollbar {
    display: none;
}

.carousel-slide {
    flex: 0 0 calc(33.333% - 15px);
    border-radius: 20px;
    box-shadow: 0 10px 20px var(--shadow-color);
    scroll-snap-align: center;
    object-fit: cover;
    max-height: 550px;
}

.carousel-btn {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 4px 10px var(--shadow-color);
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
    z-index: 10;
}

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

/* Accordion FAQ */
.faq-accordion {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    background: var(--surface-color);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    padding: 1.5rem;
    background: none;
    border: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.2rem;
    font-weight: 600;
    font-family: inherit;
    color: var(--text-color);
    cursor: pointer;
    text-align: left;
}

.faq-question i {
    color: var(--primary-color);
    transition: transform 0.3s ease;
}

.faq-question.active i {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 1.5rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    color: var(--text-secondary);
}

.faq-question.active + .faq-answer {
    padding-bottom: 1.5rem;
}

/* Footer */
.footer {
    background-color: var(--surface-variant);
    padding: 4rem 0 0 0;
    margin-top: 4rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand {
    flex: 2;
    min-width: 250px;
}

.footer-brand p {
    color: var(--text-secondary);
    margin-top: 1rem;
    max-width: 300px;
}

.footer-links {
    flex: 1;
    min-width: 150px;
}

.footer-links h4 {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.8rem;
}

.footer-links a {
    color: var(--text-secondary);
    transition: color 0.3s;
}

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

.footer-bottom {
    text-align: center;
    padding: 1.5rem 0;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 992px) {
    .hero-content, .usecase-split {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-text p {
        margin: 0 auto 2rem;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .check-list li {
        justify-content: center;
    }
    
    .carousel-slide {
        flex: 0 0 calc(50% - 10px);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none; /* simple mobile nav override or hidden for simplicity */
    }
    
    .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--surface-color);
        padding: 2rem;
        box-shadow: 0 10px 20px var(--shadow-color);
    }
    
    .hero-text h1 {
        font-size: 2.5rem;
    }
    
    .btn-large {
        padding: 0.8rem 1.5rem;
        font-size: 1rem;
    }

    .carousel-slide {
        flex: 0 0 calc(100%);
    }
}

/* --- Fade In Animations --- */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in.appear {
    opacity: 1;
    transform: translateY(0);
}

/* --- Lightbox Modal --- */
.lightbox {
    display: none;
    position: fixed;
    z-index: 2000;
    padding-top: 50px;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(5px);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.lightbox.show {
    display: block;
    opacity: 1;
}

.lightbox-content {
    margin: auto;
    display: block;
    max-width: 90%;
    max-height: 85vh;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
    animation: zoomIn 0.3s ease;
}

@keyframes zoomIn {
    from {transform: scale(0.9); opacity: 0;}
    to {transform: scale(1); opacity: 1;}
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 35px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    transition: 0.3s;
    cursor: pointer;
}

.lightbox-close:hover,
.lightbox-close:focus {
    color: #bbb;
    text-decoration: none;
    cursor: pointer;
}

.lightbox-trigger {
    cursor: pointer;
}