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

:root {
    --bg-color: #ffffff;
    --bg-gradient: radial-gradient(circle at 50% 0%, #eff6ff 0%, #ffffff 50%);
    --card-bg: rgba(255, 255, 255, 0.8);
    --card-border: rgba(226, 232, 240, 0.8);
    /* Slate 200 */
    --primary: #2563eb;
    /* Stronger blue for contrast against white */
    --primary-glow: #3b82f6;
    --accent: #2563eb;
    /* Darker cyan */
    --text-main: #0f172a;
    /* Slate 900 */
    --text-muted: #64748b;
    /* Slate 500 */
    --font-main: 'Outfit', sans-serif;
    --glass: rgba(255, 255, 255, 0.9);
}

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

body {
    background-color: var(--bg-color);
    background-image: var(--bg-gradient);
    background-attachment: fixed;
    color: var(--text-main);
    font-family: var(--font-main);
    overflow-x: hidden;
    line-height: 1.6;
    min-height: 100vh;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-color);
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    /* Slate 300 */
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

a {
    text-decoration: none;
    color: inherit;
    transition: 0.3s ease;
}

ul {
    list-style: none;
}

/* Utilities */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    /* Adjusted for light mode contrast */
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, #1d4ed8 100%);
    color: white;
    box-shadow: 0 4px 20px rgba(37, 99, 235, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(37, 99, 235, 0.4);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--card-border);
    color: var(--text-main);
}

.btn-outline:hover {
    border-color: var(--primary);
    background: rgba(59, 130, 246, 0.05);
}

/* Header */
header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.5rem 0;
    transition: all 0.4s ease;
}

header.scrolled {
    padding: 1rem 0;
    background: var(--glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--card-border);
    box-shadow: 0 4px 30px -5px rgba(0, 0, 0, 0.03);
    /* Subtle shadow for light mode */
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--text-main);
    /* Changed from white to variable */
}

.logo img {
    height: 40px;
    width: auto;
    border-radius: 8px;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
}

.nav-links a {
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.95rem;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-main);
    /* Removed text-shadow for cleaner light mode look */
}

/* Hero Section */
.hero {
    padding: 180px 0 100px;
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-content {
    max-width: 800px;
}

.hero h1 {
    font-size: 4.5rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    font-weight: 800;
    color: var(--text-main);
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 600px;
}

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

.hero-bg-glow {
    position: absolute;
    top: 50%;
    right: -10%;
    transform: translateY(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.08) 0%, rgba(255, 255, 255, 0) 70%);
    /* Adjusted opacity */
    border-radius: 50%;
    z-index: -1;
    pointer-events: none;
}

/* Stats/Trusted Badge */
.trusted-badge {
    margin-top: 4rem;
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 2rem;
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    backdrop-filter: blur(5px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    /* Added shadow */
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-num {
    font-weight: 700;
    color: var(--text-main);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Services Section */
.section {
    padding: 100px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-tag {
    color: var(--primary);
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 2px;
    font-weight: 700;
    margin-bottom: 1rem;
    display: block;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-main);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.card {
    background: white;
    /* Solid white for cards in light mode usually looks better than semi-transparent */
    border: 1px solid var(--card-border);
    padding: 2.5rem;
    border-radius: 20px;
    transition: all 0.3s ease;
    cursor: default;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
}

.card:hover {
    background: white;
    border-color: var(--primary);
    transform: translateY(-5px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.card-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(8, 145, 178, 0.1));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    color: var(--primary);
}

.card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-main);
}

.card p {
    color: var(--text-muted);
    font-size: 1rem;
    line-height: 1.7;
}

/* Tech Stack Marquee */
.marquee-container {
    overflow: hidden;
    padding: 3rem 0;
    background: #f1f5f9;
    /* Slate 100 */
    margin: 4rem 0;
    border-top: 1px solid var(--card-border);
    border-bottom: 1px solid var(--card-border);
}

.marquee-content {
    display: flex;
    gap: 4rem;
    animation: scroll 20s linear infinite;
    width: max-content;
}

.tech-item {
    font-weight: 600;
    font-size: 1.5rem;
    color: var(--text-muted);
    opacity: 0.6;
    /* Slightly higher opacity for light mode */
    transition: 0.3s;
}

.tech-item:hover {
    opacity: 1;
    color: var(--primary);
}

@keyframes scroll {
    0% {
        transform: translateX(0);
    }

    100% {
        transform: translateX(-50%);
    }
}

/* Contact/Footer */
.cta-section {
    text-align: center;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0) 0%, rgba(37, 99, 235, 0.05) 100%);
    padding: 100px 0;
    border-top: 1px solid var(--card-border);
}

footer {
    padding: 3rem 0;
    border-top: 1px solid var(--card-border);
    margin-top: auto;
    text-align: center;
    color: var(--text-muted);
    background: white;
    font-size: 0.9rem;
}

/* Animations */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Mobile */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 3rem;
    }

    .nav-links {
        display: none;
        /* Simplification for this demo */
    }
}