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

:root {
    /* Colors - Refined Palette */
    --primary-color: #3b82f6;
    /* Blue 500 */
    --primary-dark: #1d4ed8;
    /* Blue 700 */
    --primary-light: #93c5fd;
    /* Blue 300 */
    --secondary-color: #0ea5e9;
    /* Sky 500 */
    --accent-color: #f59e0b;
    /* Amber 500 */

    --text-main: #0f172a;
    /* Slate 900 */
    --text-light: #64748b;
    /* Slate 500 */
    --text-lighter: #94a3b8;
    /* Slate 400 */

    --bg-body: #f8fafc;
    /* Slate 50 */
    --bg-white: #ffffff;
    --bg-glass: rgba(255, 255, 255, 0.7);
    --bg-glass-dark: rgba(15, 23, 42, 0.8);
    --bg-footer: #0f172a;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 64px;

    /* Layout */
    --container-width: 1200px;
    --header-height: 80px;
    /* Slightly taller header */

    /* Shadows - Softer & Deeper */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.06);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.05);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 10px 10px -5px rgb(0 0 0 / 0.04);
    --shadow-glow: 0 0 15px rgba(59, 130, 246, 0.5);

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 24px;
    /* More rounded */
    --radius-full: 9999px;

    /* Transitions */
    --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-main);
    background-color: var(--bg-body);
    background-image:
        radial-gradient(at 0% 0%, rgba(59, 130, 246, 0.05) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(14, 165, 233, 0.05) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(245, 158, 11, 0.05) 0px, transparent 50%),
        radial-gradient(at 0% 100%, rgba(59, 130, 246, 0.05) 0px, transparent 50%);
    background-attachment: fixed;
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-base);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

/* Layout Utilities */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-xxl) 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--text-main);
    position: relative;
    letter-spacing: -0.02em;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 6px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    margin: var(--spacing-md) auto 0;
    border-radius: var(--radius-full);
    box-shadow: 0 2px 4px rgba(59, 130, 246, 0.3);
}

/* Navbar */
.navbar {
    background: var(--bg-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.5);
    height: var(--header-height);
    position: sticky;
    top: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    transition: var(--transition-base);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-md);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.nav-logo img {
    height: 40px;
    transition: var(--transition-base);
}

.nav-logo:hover img {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    gap: var(--spacing-xl);
}

.nav-links a {
    font-weight: 500;
    color: var(--text-main);
    font-size: 1rem;
    position: relative;
    padding: 4px 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary-color);
}

/* Hero / Focus */
.hero {
    position: relative;
    width: 100%;
    overflow: hidden;
    /* Add a subtle shadow to separate from content */
    box-shadow: var(--shadow-lg);
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(15, 23, 42, 0.1), rgba(15, 23, 42, 0.4));
    pointer-events: none;
}

.hero img {
    width: 100%;
    height: auto;
    object-fit: cover;
    min-height: 500px;
    /* Taller hero */
    /* Ensure visibility on large screens */
    animation: zoomIn 25s infinite alternate cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes zoomIn {
    from {
        transform: scale(1);
    }

    to {
        transform: scale(1.15);
    }
}

/* Features */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-top: -60px;
    /* Overlap hero */
    position: relative;
    z-index: 10;
    padding-bottom: var(--spacing-xxl);
}

.feature-card {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: var(--transition-base);
    border: 1px solid rgba(255, 255, 255, 0.6);
    position: relative;
    overflow: hidden;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.feature-card img {
    height: 60px;
    margin: 0 auto var(--spacing-md);
    transition: transform 0.3s ease;
}

.feature-card:hover img {
    transform: scale(1.1) rotate(5deg);
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-main);
    font-weight: 700;
}

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

/* Solutions Grid */
.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: var(--spacing-xl);
}

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

.solution-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    position: relative;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.solution-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-5px);
}

.solution-card img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.solution-card:hover img {
    transform: scale(1.05);
}

.solution-content {
    padding: var(--spacing-lg);
}

.solution-content h3 a {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    display: block;
    color: var(--text-main);
}

.solution-content h3 a:hover {
    color: var(--primary-color);
}

.solution-content p {
    color: var(--text-light);
}

/* Hardware Section */
.hardware-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

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

.hardware-item {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    height: 400px;
    box-shadow: var(--shadow-md);
}

.hardware-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.hardware-item:hover img {
    transform: scale(1.1);
}

.hardware-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    background: linear-gradient(to top, rgba(15, 23, 42, 0.95), rgba(15, 23, 42, 0.6), transparent);
    padding: var(--spacing-xl);
    color: white;
    transform: translateY(20px);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
    backdrop-filter: blur(4px);
}

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

.hardware-overlay h3 {
    font-size: 1.5rem;
    font-weight: 600;
}

/* API Section */
.api-section {
    background: linear-gradient(120deg, var(--primary-dark), var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-xxl);
    text-align: center;
    margin: var(--spacing-xxl) 0;
    box-shadow: var(--shadow-xl);
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.api-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 60%);
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

.api-content {
    position: relative;
    z-index: 1;
}

.api-content h3 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    font-weight: 800;
}

.api-content p {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* Contact Section */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.contact-card {
    background: var(--bg-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    transition: var(--transition-base);
    border: 1px solid transparent;
}

.contact-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
    transform: translateY(-5px);
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: var(--bg-body);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: var(--transition-base);
}

.contact-card:hover .contact-icon {
    background: var(--primary-color);
}

.contact-card:hover .contact-icon img {
    filter: brightness(0) invert(1);
}

.contact-info h4 {
    font-size: 1.1rem;
    color: var(--text-main);
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.contact-info p {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-xs);
}

.contact-info h3 {
    font-size: 1.25rem;
    color: var(--primary-color);
    font-weight: 700;
}

/* Footer */
.footer {
    background: linear-gradient(to bottom, var(--bg-footer), #020617);
    color: white;
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-col h4 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-lg);
    color: white;
    font-weight: 600;
}

.footer-col p,
.footer-col a {
    color: #94a3b8;
    margin-bottom: var(--spacing-sm);
    display: block;
    transition: color 0.2s;
}

.footer-col a:hover {
    color: white;
    padding-left: 5px;
}

.copyright {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-lg);
    text-align: center;
    color: #64748b;
    font-size: 0.9rem;
}

/* About Page Specifics */
.about-summary {
    background: var(--bg-white);
    padding: var(--spacing-xxl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-xxl);
}

.credentials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.credential-item {
    text-align: center;
    background: var(--bg-white);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

.credential-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.credential-item img {
    width: 100%;
    height: 150px;
    object-fit: contain;
    margin-bottom: var(--spacing-sm);
}

.credential-item span {
    font-size: 0.9rem;
    color: var(--text-main);
    font-weight: 500;
}

/* Scenes / Environment */
.scenes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.scene-item {
    overflow: hidden;
    border-radius: var(--radius-md);
}

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

.scene-item:hover img {
    transform: scale(1.1);
}

/* Project List (Solution Page) */
.project-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xxl);
}

.project-item {
    display: flex;
    gap: var(--spacing-xl);
    background: var(--bg-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    align-items: center;
    transition: var(--transition-base);
}

.project-item:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

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

.project-item img {
    width: 40%;
    max-width: 400px;
    border-radius: var(--radius-md);
    object-fit: cover;
}

.project-info {
    flex: 1;
}

.project-info h3 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-main);
    font-weight: 700;
}

.project-info p {
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
}

.btn {
    display: inline-block;
    padding: 14px 32px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border-radius: var(--radius-full);
    /* Pill shape */
    font-weight: 600;
    transition: var(--transition-base);
    box-shadow: 0 4px 6px rgba(37, 99, 235, 0.2);
    letter-spacing: 0.02em;
}

.btn:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -5px rgba(37, 99, 235, 0.4);
}

/* Tabs */
.project-tabs {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    border-bottom: 1px solid #e2e8f0;
    padding-bottom: var(--spacing-md);
}

.project-tabs a {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-weight: 500;
    color: var(--text-light);
    border-bottom: 2px solid transparent;
    transition: var(--transition-base);
}

.project-tabs a.active,
.project-tabs a:hover {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    background: rgba(37, 99, 235, 0.05);
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}

/* Project Detail */
.project-detail-header {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
}

.project-detail-header h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    font-weight: 800;
    color: var(--text-main);
}

.project-section {
    margin-bottom: var(--spacing-xxl);
}

.project-section-title {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-lg);
    border-left: 5px solid var(--primary-color);
    padding-left: var(--spacing-md);
    font-weight: 700;
    color: var(--text-main);
}

.feature-row {
    display: flex;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    align-items: center;
}

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

.feature-content {
    flex: 1;
}

.feature-image {
    flex: 1;
}

.feature-image img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
}

.feature-image img:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-lg);
}

.feature-content h4 {
    font-size: 1.4rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-main);
    font-weight: 600;
}

.feature-content ul {
    list-style: disc;
    padding-left: 20px;
    color: var(--text-light);
}

.feature-content ul li {
    margin-bottom: 8px;
}

/* Video Grid */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.video-item {
    background: var(--bg-white);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: var(--transition-base);
}

.video-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.video-item video {
    width: 100%;
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
    background: #000;
}

@media (max-width: 768px) {

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

    .project-item img {
        width: 100%;
        max-width: none;
    }

    .project-tabs {
        flex-direction: column;
        align-items: center;
    }

    .section-title {
        font-size: 2rem;
    }

    .hero img {
        min-height: 250px;
    }
}

/* Animations */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.animate-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.stagger-delay-1 {
    transition-delay: 0.1s;
}

.stagger-delay-2 {
    transition-delay: 0.2s;
}

.stagger-delay-3 {
    transition-delay: 0.3s;
}

.stagger-delay-4 {
    transition-delay: 0.4s;
}