:root {
    --bg-dark: #020617;
    --surface-dark: #0f172a;
    --primary: #38bdf8;
    --secondary: #818cf8;
    --accent: #c084fc;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --glass: rgba(15, 23, 42, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --gradient-hero: linear-gradient(135deg, #38bdf8 0%, #818cf8 50%, #c084fc 100%);
    --transition-slow: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: all 0.3s ease;
}

/* Preloader */
#preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg-dark);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.8s ease, visibility 0.8s ease;
}

.loader-content {
    text-align: center;
}

.loader-circle {
    width: 80px;
    height: 80px;
    border: 3px solid rgba(56, 189, 248, 0.1);
    border-top: 3px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s cubic-bezier(0.5, 0, 0.5, 1) infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

#preloader.fade-out {
    opacity: 0;
    visibility: hidden;
}

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

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}
::-webkit-scrollbar-track {
    background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
    background: #1e293b;
    border-radius: 10px;
    border: 2px solid var(--bg-dark);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

html {
    scroll-behavior: smooth;
}

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

/* Typography */
h1 {
    font-size: clamp(2.2rem, 6vw, 3.8rem);
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

h2 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    letter-spacing: -0.03em;
}

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

/* Background Gradients */
.bg-glow {
    position: fixed;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(56, 189, 248, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    z-index: -1;
    filter: blur(80px);
}

.glow-1 { top: -100px; right: -100px; }
.glow-2 { bottom: -100px; left: -100px; }

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.5rem 2rem;
    transition: var(--transition-slow);
    background: white; /* Force white for logo visibility */
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.navbar.scrolled {
    padding: 1rem 2rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

.nav-container {
    max-width: 1300px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--bg-dark); /* Dark text for light navbar */
}

.logo img {
    height: 40px;
    width: auto;
}

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

.nav-links a {
    text-decoration: none;
    color: #475569; /* Slate 600 for better contrast on white */
    font-weight: 500;
    transition: var(--transition-fast);
    font-size: 0.95rem;
}

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

/* Sections */
section {
    padding: 10rem 2rem;
    position: relative;
}

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

/* Hero */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 6rem;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 4rem;
    align-items: center;
}

.gradient-text {
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.25rem;
    max-width: 550px;
    margin-bottom: 3rem;
}

.btn-group {
    display: flex;
    gap: 1.5rem;
}

.btn {
    padding: 1rem 2rem;
    border-radius: 12px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-slow);
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    transform: scale(1.05);
    box-shadow: 0 0 30px rgba(255,255,255,0.2);
}

.btn-secondary {
    background: rgba(0,0,0,0.05);
    color: var(--bg-dark);
    border: 1px solid rgba(0,0,0,0.1);
}

.btn-secondary:hover {
    background: rgba(0,0,0,0.1);
}

.hero-visual {
    position: relative;
}

.visual-mockup {
    width: 100%;
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    box-shadow: 0 40px 100px -20px rgba(0,0,0,0.5);
    transition: var(--transition-slow);
}

/* Problem/Solution */
.problem-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.stat-card {
    background: var(--surface-dark);
    padding: 3rem;
    border-radius: 24px;
    border: 1px solid var(--glass-border);
}

.stat-number {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}

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

.service-card {
    background: linear-gradient(180deg, rgba(255,255,255,0.03) 0%, transparent 100%);
    padding: 3rem;
    border-radius: 32px;
    border: 1px solid var(--glass-border);
    transition: var(--transition-slow);
}

.service-card:hover {
    border-color: var(--primary);
    transform: translateY(-10px);
}

.icon-box {
    width: 64px;
    height: 64px;
    background: rgba(56, 189, 248, 0.1);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    margin-bottom: 2rem;
}

/* Animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: var(--transition-slow);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Footer */
footer {
    padding: 6rem 2rem 3rem;
    border-top: 1px solid var(--glass-border);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: 4rem;
    max-width: 1200px;
    margin: 0 auto;
}

/* Mobile Refinements */
@media (max-width: 1024px) {
    .hero-grid { grid-template-columns: 1fr; text-align: center; }
    .hero-visual { order: -1; }
    .hero p { margin: 0 auto 3rem; }
    .btn-group { justify-content: center; }
    .nav-links { display: none; }
    .mobile-toggle { display: block !important; }
    
    .problem-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

/* Mobile Dropdown Menu */
.mobile-menu {
    position: fixed;
    top: 5rem; /* Just below the navbar */
    right: -100%;
    width: 100%;
    padding: 1.5rem;
    z-index: 999;
    transition: var(--transition-slow);
}

.mobile-menu.active {
    right: 0;
}

.mobile-menu-content {
    background: white;
    width: 100%;
    border-radius: 24px; /* Rounded corners */
    padding: 2rem;
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
    border: 1px solid rgba(0,0,0,0.05);
}

.mobile-menu-content .logo {
    display: none; /* Hide logo in dropdown since it's in the navbar above */
}

.mobile-links {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.mobile-links a {
    text-decoration: none;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--bg-dark);
    padding: 1rem;
    border-radius: 16px;
    transition: var(--transition-fast);
}

.mobile-links a:hover {
    background: var(--bg-light);
    color: var(--primary);
}

@media (max-width: 640px) {
    section { padding: 6rem 1.5rem; }
    h1 { font-size: 2.5rem; }
    .btn-group { flex-direction: column; width: 100%; }
    .btn { width: 100%; text-align: center; }
    .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
    .lang-btn span:last-child { display: none; } /* Hide 'EN' text on very small screens */
}