/* Custom Properties & Tokens */
:root {
    /* Light Theme (Default) */
    --bg-primary: #F7FAFC;
    --bg-secondary: #EEF3F8;
    --bg-surface: #FFFFFF;
    --text-main: #0F172A;
    --text-sec: #475569;
    
    --acc-cyan: #06B6D4;
    --acc-blue: #3B82F6;
    --acc-purple: #7C3AED;
    
    --border-color: rgba(15, 23, 42, 0.08);
    --border-hover: rgba(59, 130, 246, 0.3);
    
    --nav-bg: rgba(247, 250, 252, 0.85);
    --card-bg: rgba(255, 255, 255, 0.8);
    --footer-bg: #FFFFFF;
    
    --card-shadow: 0 4px 24px rgba(15, 23, 42, 0.04);
    --card-shadow-hover: 0 16px 40px rgba(15, 23, 42, 0.08);
    
    --font-main: 'Inter', -apple-system, system-ui, sans-serif;
    --transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    
    --hero-grid-color: rgba(15, 23, 42, 0.04);
}

[data-theme="dark"] {
    /* Dark Theme */
    --bg-primary: #0B0F19;
    --bg-secondary: #0F1522;
    --bg-surface: #1E293B;
    --text-main: #F8FAFC;
    --text-sec: #94A3B8;
    
    --acc-cyan: #22D3EE;
    --acc-blue: #60A5FA;
    --acc-purple: #A78BFA;
    
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(96, 165, 250, 0.4);
    
    --nav-bg: rgba(11, 15, 25, 0.85);
    --card-bg: rgba(30, 41, 59, 0.4);
    --footer-bg: #0F1522;
    
    --card-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    --card-shadow-hover: 0 20px 48px rgba(0, 0, 0, 0.6);
    
    --hero-grid-color: rgba(255, 255, 255, 0.03);
}

/* Base Reset & Core */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-main);
    background-color: var(--bg-primary);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    transition: background-color 0.5s ease, color 0.5s ease;
}
a { text-decoration: none; color: inherit; transition: var(--transition); }
ul { list-style: none; }
img, svg { max-width: 100%; display: block; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; position: relative; z-index: 2; }
.section { padding: 9rem 0; position: relative; }

/* Utilities */
.section-header { text-align: center; max-width: 700px; margin: 0 auto 5rem; }
.section-header h2 { font-size: 2.75rem; font-weight: 700; margin-bottom: 1.25rem; letter-spacing: -0.02em; }
.section-header p { color: var(--text-sec); font-size: 1.15rem; }
.text-gradient {
    background: linear-gradient(90deg, var(--acc-blue), var(--acc-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}
.gradient-large { background: linear-gradient(135deg, var(--acc-cyan), var(--acc-blue), var(--acc-purple)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }

/* Buttons */
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 0.875rem 2rem; border-radius: 8px; font-weight: 600; font-size: 1rem;
    cursor: pointer; transition: var(--transition); border: 1px solid transparent; text-align: center;
}
.btn-sm { padding: 0.6rem 1.25rem; font-size: 0.95rem; }
.btn-lg { padding: 1.25rem 2.75rem; font-size: 1.125rem; }
.btn-primary {
    background: linear-gradient(90deg, var(--acc-blue), var(--acc-purple));
    color: #fff; box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3); border: none;
}
.btn-primary:hover { box-shadow: 0 8px 25px rgba(59, 130, 246, 0.4); transform: translateY(-3px); }
.btn-secondary {
    background: var(--card-bg); color: var(--text-main); border-color: var(--border-color);
    box-shadow: var(--card-shadow); backdrop-filter: blur(8px);
}
.btn-secondary:hover { border-color: var(--acc-blue); transform: translateY(-3px); color: var(--acc-blue); }

/* Navbar */
.navbar { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; background: var(--nav-bg); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); border-bottom: 1px solid var(--border-color); transition: var(--transition); }
.navbar.scrolled { padding: 0.5rem 0; box-shadow: 0 4px 30px rgba(0, 0, 0, 0.05); }
.nav-container { max-width: 1200px; margin: 0 auto; padding: 1rem 2rem; display: flex; justify-content: space-between; align-items: center; }
.logo svg { height: 32px; width: auto; transition: var(--transition); }

.nav-right { display: flex; align-items: center; gap: 2.5rem; }
.nav-links { display: flex; align-items: center; gap: 2.25rem; }
.nav-links a:not(.btn) { color: var(--text-sec); font-weight: 500; font-size: 0.95rem; position: relative; }
.nav-links a:not(.btn)::after { content: ''; position: absolute; bottom: -4px; left: 0; width: 0%; height: 2px; background: var(--acc-blue); transition: var(--transition); border-radius: 2px; }
.nav-links a:not(.btn):hover { color: var(--text-main); }
.nav-links a:not(.btn):hover::after { width: 100%; }

.nav-controls { display: flex; align-items: center; gap: 1rem; }
.theme-btn, .lang-btn { background: var(--card-bg); border: 1px solid var(--border-color); padding: 0.5rem; border-radius: 8px; cursor: pointer; color: var(--text-sec); display: flex; align-items: center; justify-content: center; transition: var(--transition); }
.theme-btn { width: 40px; height: 40px; }
.theme-btn svg { width: 20px; height: 20px; }
.lang-btn { height: 40px; padding: 0 1rem; gap: 0.5rem; font-weight: 600; font-size: 0.85rem; }
.theme-btn:hover, .lang-btn:hover { border-color: var(--acc-blue); color: var(--acc-blue); transform: translateY(-2px); }

.lang-switcher { position: relative; display: inline-block; }
.lang-dropdown { position: absolute; top: calc(100% + 10px); right: 0; background: var(--bg-surface); border: 1px solid var(--border-color); border-radius: 8px; box-shadow: var(--card-shadow-hover); display: none; flex-direction: column; min-width: 140px; z-index: 100; overflow: hidden; opacity: 0; transform: translateY(-10px); transition: all 0.3s ease; }
.lang-switcher:hover .lang-dropdown { display: flex; opacity: 1; transform: translateY(0); }
.lang-dropdown button { background: none; border: none; padding: 0.85rem 1.25rem; text-align: left; width: 100%; cursor: pointer; font-size: 0.9rem; font-weight: 500; color: var(--text-sec); transition: var(--transition); }
.lang-dropdown button:hover { background: var(--bg-secondary); color: var(--acc-blue); }

.mobile-menu-btn { display: none; flex-direction: column; justify-content: space-between; height: 20px; width: 26px; background: transparent; border: none; cursor: pointer; z-index: 1001; }
.mobile-menu-btn .bar { width: 100%; height: 2px; background-color: var(--text-main); transition: var(--transition); border-radius: 2px; }

/* Hero */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; justify-content: center; text-align: center; padding: 8rem 2rem 4rem; overflow: hidden; }
.hero-bg-container { position: absolute; inset: 0; overflow: hidden; z-index: 0; }
.hero-bg-grid { position: absolute; inset: -50%; background-image: linear-gradient(var(--hero-grid-color) 1px, transparent 1px), linear-gradient(90deg, var(--hero-grid-color) 1px, transparent 1px); background-size: 50px 50px; transform: perspective(800px) rotateX(60deg) scale(1.5) translateY(-20%); animation: gridMove 20s linear infinite; }
.hero-glow { position: absolute; border-radius: 50%; filter: blur(100px); z-index: 0; opacity: 0.6; mix-blend-mode: normal; animation: float 10s ease-in-out infinite alternate; }
.hero-glow-1 { width: 50vw; height: 50vw; background: rgba(59, 130, 246, 0.15); top: -20%; left: -10%; }
.hero-glow-2 { width: 40vw; height: 40vw; background: rgba(124, 58, 237, 0.15); bottom: -10%; right: -10%; animation-delay: -5s; }
.hero-glow-3 { width: 30vw; height: 30vw; background: rgba(6, 182, 212, 0.12); top: 30%; left: 40%; animation-delay: -2s; }

.hero-content { position: relative; z-index: 2; max-width: 900px; }
.badge { display: inline-block; padding: 0.6rem 1.5rem; background: var(--card-bg); border: 1px solid var(--border-color); border-radius: 100px; font-size: 0.85rem; font-weight: 600; color: var(--text-main); margin-bottom: 2.5rem; letter-spacing: 0.08em; text-transform: uppercase; box-shadow: var(--card-shadow); backdrop-filter: blur(8px); }
.badge::before { content: '•'; color: var(--acc-blue); margin-right: 8px; font-size: 1.2rem; line-height: 0; vertical-align: middle; }
.hero h1 { font-size: 5rem; font-weight: 800; line-height: 1.05; margin-bottom: 1.75rem; letter-spacing: -0.04em; color: var(--text-main); text-shadow: 0 10px 30px rgba(0,0,0,0.05); }
.hero-subtitle { font-size: 1.35rem; color: var(--text-sec); margin-bottom: 3rem; max-width: 650px; margin-left: auto; margin-right: auto; }
.hero-actions { display: flex; gap: 1.25rem; justify-content: center; }

/* Focus Areas (Services) - Expanded to 6 items */
.services { background: var(--bg-secondary); }
.services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 2.5rem; }
.service-card { background: var(--card-bg); border: 1px solid var(--border-color); border-radius: 20px; padding: 3rem 2.5rem; transition: var(--transition); box-shadow: var(--card-shadow); position: relative; overflow: hidden; backdrop-filter: blur(10px); }
.service-card::after { content: ''; position: absolute; inset: 0; background: radial-gradient(800px circle at var(--mouse-x, 50%) var(--mouse-y, -100%), rgba(255,255,255,0.06), transparent 40%); opacity: 0; transition: opacity 0.3s; pointer-events: none; }
.service-card:hover { transform: translateY(-8px); box-shadow: var(--card-shadow-hover); border-color: var(--border-hover); }
.service-card:hover::after { opacity: 1; }
.service-icon { width: 64px; height: 64px; background: var(--bg-primary); border: 1px solid var(--border-color); border-radius: 16px; display: flex; align-items: center; justify-content: center; margin-bottom: 2rem; color: var(--acc-blue); box-shadow: 0 8px 16px rgba(0,0,0,0.03); transition: var(--transition); }
.service-card:hover .service-icon { transform: scale(1.1) rotate(-5deg); color: var(--acc-cyan); border-color: var(--acc-blue); }
.service-icon svg { width: 32px; height: 32px; stroke-width: 1.5; }
.service-card h3 { font-size: 1.4rem; font-weight: 700; margin-bottom: 1rem; color: var(--text-main); letter-spacing: -0.01em; }
.service-card p { color: var(--text-sec); font-size: 1.05rem; line-height: 1.6; }

/* Redesigned About Section */
.about { position: relative; overflow: hidden; }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; max-width: 1100px; margin: 0 auto; }
.about-visual { position: relative; padding: 2rem; }
.glass-panel { background: var(--card-bg); border: 1px solid var(--border-color); border-radius: 24px; padding: 3rem; box-shadow: var(--card-shadow-hover); position: relative; backdrop-filter: blur(16px); min-height: 400px; overflow: hidden; display: flex; flex-direction: column; justify-content: center; }
.abstract-shape { position: absolute; right: -20px; top: -20px; opacity: 0.15; color: var(--acc-blue); pointer-events: none; }
.rotating-icon { width: 250px; height: 250px; animation: spinRotate 30s linear infinite; }
.chip-container { display: flex; flex-direction: column; gap: 1rem; position: relative; z-index: 2; }
.chip { display: inline-flex; align-items: center; padding: 1rem 1.5rem; background: var(--bg-surface); border: 1px solid var(--border-color); border-radius: 12px; font-weight: 600; font-size: 1rem; color: var(--text-main); box-shadow: var(--card-shadow); max-width: max-content; transition: var(--transition); }
.chip::before { content: ''; display: block; width: 10px; height: 10px; border-radius: 50%; background: linear-gradient(90deg, var(--acc-blue), var(--acc-purple)); margin-right: 12px; }
.chip-offset { margin-left: 3rem; }
.chip:hover { transform: translateX(10px); border-color: var(--acc-blue); }

.about-content { padding-right: 2rem; }
.accent-line { width: 60px; height: 4px; background: linear-gradient(90deg, var(--acc-blue), var(--acc-purple)); border: none; border-radius: 2px; margin-bottom: 2rem; }
.about-headline { font-size: 3rem; font-weight: 600; line-height: 1.2; margin-bottom: 1.5rem; letter-spacing: -0.02em; }
.about-description { font-size: 1.25rem; color: var(--text-sec); line-height: 1.8; }

/* Why Choose Us */
.why-us { background: var(--bg-secondary); }
.features-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2rem; max-width: 900px; margin: 0 auto; }
.feature-card { display: flex; flex-direction: column; gap: 1.5rem; background: var(--card-bg); padding: 2.5rem; border-radius: 20px; border: 1px solid var(--border-color); box-shadow: var(--card-shadow); transition: var(--transition); }
.feature-card:hover { box-shadow: var(--card-shadow-hover); transform: translateY(-5px); border-color: var(--border-hover); }
.feature-marker { width: 48px; height: 4px; background: linear-gradient(90deg, var(--acc-blue), var(--acc-purple)); border-radius: 2px; transition: var(--transition); }
.feature-card:hover .feature-marker { width: 100px; }
.feature-content h4 { font-size: 1.35rem; font-weight: 700; margin-bottom: 0.75rem; letter-spacing: -0.01em; }
.feature-content p { color: var(--text-sec); font-size: 1.05rem; }

/* CTA Section */
.cta-box { position: relative; background: var(--bg-surface); border: 1px solid var(--border-color); border-radius: 32px; padding: 6rem 4rem; text-align: center; box-shadow: var(--card-shadow-hover); overflow: hidden; }
.cta-bg-pattern { position: absolute; inset: 0; background-image: radial-gradient(var(--border-color) 2px, transparent 2px); background-size: 30px 30px; opacity: 0.5; }
.cta-glow { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 80%; height: 80%; background: radial-gradient(circle at center, var(--acc-glow) 0%, transparent 70%); z-index: 0; pointer-events: none; }
.cta-content { position: relative; z-index: 1; max-width: 700px; margin: 0 auto; }
.cta-content h2 { font-size: 3.5rem; font-weight: 800; line-height: 1.15; margin-bottom: 1.5rem; letter-spacing: -0.03em; }
.cta-content p { color: var(--text-sec); font-size: 1.25rem; margin-bottom: 3rem; }

/* Footer */
.footer { background: var(--footer-bg); border-top: 1px solid var(--border-color); padding: 5rem 0 2rem; }
.footer-top { display: flex; justify-content: space-between; gap: 4rem; margin-bottom: 4rem; flex-wrap: wrap; }
.footer-brand { max-width: 350px; }
.footer-logo { margin-bottom: 1.5rem; display: block; }
.footer-brand p { color: var(--text-sec); font-size: 1rem; line-height: 1.6; }
.footer-links { display: flex; gap: 5rem; flex-wrap: wrap; }
.link-group h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 1.5rem; color: var(--text-main); }
.link-group a { display: block; color: var(--text-sec); margin-bottom: 0.8rem; font-size: 0.95rem; font-weight: 500; transition: var(--transition); }
.link-group p { color: var(--text-sec); font-size: 0.95rem; line-height: 1.6; }
.link-group a:hover { color: var(--acc-blue); transform: translateX(5px); }
.footer-bottom { border-top: 1px solid var(--border-color); padding-top: 2rem; color: var(--text-sec); font-size: 0.9rem; text-align: center; }

/* Custom Animations */
@keyframes float { 0% { transform: translateY(0) scale(1); } 100% { transform: translateY(-40px) scale(1.05); } }
@keyframes gridMove { 0% { background-position: 0 0; } 100% { background-position: 0 50px; } }
@keyframes spinRotate { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }

.reveal { opacity: 0; transform: translateY(40px) scale(0.98); transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1); will-change: opacity, transform; }
.reveal.active { opacity: 1; transform: translateY(0) scale(1); }

/* Responsive adjustments */
@media (max-width: 1024px) {
    .about-grid { grid-template-columns: 1fr; gap: 3rem; }
    .about-content { padding-right: 0; text-align: center; }
    .accent-line { margin: 0 auto 2rem; }
}

@media (max-width: 900px) {
    .hero h1 { font-size: 4rem; }
    .features-grid { grid-template-columns: 1fr; }
    .cta-content h2 { font-size: 2.75rem; }
    .footer-links { gap: 3rem; }
}

@media (max-width: 768px) {
    .nav-right { gap: 1rem; }
    .theme-btn { border: none; background: transparent; padding: 0.25rem; }
    .lang-btn { background: transparent; border: none; padding: 0.5rem; }
    #currentLang { display: none; } /* Hide text, keep icon */
    .mobile-menu-btn { display: flex; }
    .nav-links { position: fixed; top: 0; right: -100%; width: 100%; height: 100vh; background: var(--bg-surface); flex-direction: column; justify-content: center; gap: 2rem; transition: right 0.4s ease; z-index: 1000; }
    .nav-links.active { right: 0; }
    .mobile-menu-btn.active .bar:nth-child(1) { transform: translateY(9px) rotate(45deg); }
    .mobile-menu-btn.active .bar:nth-child(2) { opacity: 0; }
    .mobile-menu-btn.active .bar:nth-child(3) { transform: translateY(-9px) rotate(-45deg); }
    .mobile-menu-btn.active { z-index: 1002; }
    
    .hero { padding-top: 9rem; }
    .hero h1 { font-size: 3rem; }
    .hero-actions { flex-direction: column; }
    .about-headline { font-size: 2.5rem; }
    .footer-top { flex-direction: column; gap: 2.5rem; }
    .footer-links { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
    .cta-box { padding: 4rem 2rem; }
}

@media (max-width: 480px) {
    .footer-links { grid-template-columns: 1fr; }
    .footer-bottom { font-size: 0.85rem; line-height: 1.8; }
    .footer-bottom .footer-divider { display: none; }
    .footer-bottom span, .footer-bottom > text { display: block; margin-bottom: 0.5rem; }
}