/* ============================================
   Rayhan Labs - Modern & Chic v2
   Deep slate aesthetic with teal/cyan/purple
   ============================================ */

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

:root {
    --color-bg: #0B0F17;
    --color-bg-alt: #0f1420;
    --color-surface: #151b28;
    --color-surface-hover: #1c2435;
    --color-glass: rgba(21, 27, 40, 0.7);
    --color-text: #f0f4f8;
    --color-text-muted: #94a3b8;
    --color-text-light: #64748b;
    --gradient-brand: linear-gradient(135deg, #4dd9c0, #38bdf8, #7c9ceb, #a78bfa);
    --gradient-brand-soft: linear-gradient(135deg, rgba(77,217,192,0.1), rgba(56,189,248,0.1), rgba(167,139,250,0.06));
    --color-accent: #4dd9c0;
    --color-accent-blue: #38bdf8;
    --color-accent-purple: #a78bfa;
    --color-border: rgba(255,255,255,0.06);
    --color-border-hover: rgba(77,217,192,0.3);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --max-w: 1200px;
    --radius: 16px;
    --radius-sm: 10px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font); background: var(--color-bg); color: var(--color-text); line-height: 1.7; -webkit-font-smoothing: antialiased; }
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 2rem; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

/* Typography */
h1,h2,h3,h4 { font-weight: 700; line-height: 1.15; letter-spacing: -0.03em; }
h1 { font-size: clamp(2.5rem, 5.5vw, 4.2rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 3rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.35rem); }
em { font-style: normal; background: var(--gradient-brand); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

.section-label { font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.2em; background: var(--gradient-brand); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; margin-bottom: 1rem; }
.section-title { margin-bottom: 1.5rem; max-width: 700px; }
.section-subtitle { color: var(--color-text-muted); font-size: 1.1rem; max-width: 600px; margin-bottom: 2.5rem; }

/* --- Navbar --- */
.navbar { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; padding: 0.75rem 0; transition: var(--transition); }
.navbar.scrolled { background: rgba(11,15,23,0.92); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border-bottom: 1px solid var(--color-border); }
.navbar .container { display: flex; align-items: center; justify-content: space-between; }
.logo-img { height: 56px; width: auto; }
.nav-links { display: flex; gap: 2rem; align-items: center; }
.nav-links a { font-size: 0.875rem; font-weight: 500; color: var(--color-text-muted); position: relative; }
.nav-links a::after { content:''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px; background: var(--gradient-brand); border-radius: 1px; transition: var(--transition); }
.nav-links a:hover { color: var(--color-text); }
.nav-links a:hover::after { width: 100%; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 0.5rem; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--color-text); border-radius: 1px; transition: var(--transition); }
.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* --- Buttons --- */
.btn { display: inline-block; padding: 0.9rem 2.25rem; font-family: var(--font); font-size: 0.875rem; font-weight: 600; border-radius: 50px; transition: var(--transition); cursor: pointer; border: none; text-align: center; }
.btn-primary { background: var(--gradient-brand); color: #0B0F17; font-weight: 700; box-shadow: 0 4px 24px rgba(77,217,192,0.2); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(77,217,192,0.3); }
.btn-ghost { background: transparent; color: var(--color-text); border: 1px solid var(--color-border); }
.btn-ghost:hover { border-color: var(--color-accent); color: var(--color-accent); }
.btn-full { width: 100%; }

/* --- Hero --- */
.hero { min-height: 100vh; display: flex; flex-direction: column; justify-content: center; position: relative; padding: 8rem 0 4rem; overflow: hidden; }
.hero::before { content:''; position: absolute; top: -30%; right: -15%; width: 70%; height: 70%; background: radial-gradient(ellipse, rgba(56,189,248,0.08) 0%, transparent 65%); pointer-events: none; }
.hero::after { content:''; position: absolute; bottom: -20%; left: -10%; width: 50%; height: 50%; background: radial-gradient(ellipse, rgba(77,217,192,0.05) 0%, transparent 65%); pointer-events: none; }
.hero-content { max-width: 800px; position: relative; z-index: 1; }
.hero-tagline { font-size: 0.8rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.3em; color: var(--color-text-muted); margin-bottom: 1.5rem; }
.hero h1 { margin-bottom: 1.5rem; }
.hero-description { font-size: 1.15rem; line-height: 1.8; color: var(--color-text-muted); margin-bottom: 2.5rem; max-width: 620px; }
.hero-cta { display: flex; gap: 1rem; flex-wrap: wrap; }
.hero-scroll { position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%); display: flex; flex-direction: column; align-items: center; gap: 0.5rem; z-index: 1; }
.hero-scroll span { font-size: 0.65rem; text-transform: uppercase; letter-spacing: 0.2em; color: var(--color-text-light); }
.scroll-line { width: 1px; height: 36px; background: var(--gradient-brand); animation: scrollPulse 2s ease-in-out infinite; }
@keyframes scrollPulse { 0%,100%{ opacity:0.3; transform:scaleY(0.5); } 50%{ opacity:1; transform:scaleY(1); } }

/* --- Tech Marquee --- */
.tech-marquee { position: relative; margin-top: 3rem; overflow: hidden; border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); padding: 1rem 0; z-index: 1; }
.tech-marquee-track { display: flex; gap: 3rem; animation: marquee 25s linear infinite; white-space: nowrap; }
.tech-marquee-track span { font-size: 0.8rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.15em; color: var(--color-text-light); opacity: 0.7; }
@keyframes marquee { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* --- Services --- */
.services { padding: 6rem 0; }
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; margin-top: 3rem; }
.service-item { padding: 1.75rem; border-radius: var(--radius); border: 1px solid var(--color-border); background: var(--color-surface); transition: var(--transition); }
.service-item:hover { border-color: var(--color-border-hover); transform: translateY(-4px); box-shadow: 0 16px 48px rgba(77,217,192,0.05); }
.service-number { font-size: 0.8rem; font-weight: 700; background: var(--gradient-brand); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; display: block; margin-bottom: 0.75rem; }
.service-item h3 { font-weight: 600; font-size: 1.05rem; margin-bottom: 0.5rem; }
.service-item p { color: var(--color-text-muted); font-size: 0.9rem; line-height: 1.7; }

/* --- Process --- */
.process { padding: 6rem 0; background: var(--color-bg-alt); }
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; margin-top: 3rem; }
.process-card { padding: 2rem 1.5rem; border-radius: var(--radius); border: 1px solid var(--color-border); background: var(--color-glass); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); transition: var(--transition); position: relative; overflow: hidden; }
.process-card::before { content:''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--gradient-brand); opacity: 0; transition: var(--transition); }
.process-card:hover::before { opacity: 1; }
.process-card:hover { border-color: var(--color-border-hover); transform: translateY(-4px); }
.process-step { font-size: 2rem; font-weight: 800; background: var(--gradient-brand); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; display: block; margin-bottom: 1rem; }
.process-card h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 0.75rem; }
.process-card p { color: var(--color-text-muted); font-size: 0.875rem; line-height: 1.7; }

/* --- Portfolio Tabs --- */
.portfolio-tabs { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 2.5rem; }
.tab-btn { padding: 0.6rem 1.5rem; font-family: var(--font); font-size: 0.8rem; font-weight: 600; border: 1px solid var(--color-border); border-radius: 50px; background: transparent; color: var(--color-text-muted); cursor: pointer; transition: var(--transition); text-transform: uppercase; letter-spacing: 0.05em; }
.tab-btn:hover { border-color: var(--color-accent); color: var(--color-accent); }
.tab-btn.active { background: var(--gradient-brand); color: #fff; border-color: transparent; box-shadow: 0 4px 16px rgba(77,217,192,0.2); }

/* --- Work / Portfolio --- */
.work { padding: 6rem 0; }
.portfolio-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.work-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); overflow: hidden; transition: var(--transition), opacity 0.4s ease, transform 0.4s ease; }
.work-card.hidden { opacity: 0; transform: scale(0.95); position: absolute; pointer-events: none; }
.work-card:hover { border-color: var(--color-border-hover); transform: translateY(-6px); box-shadow: 0 20px 60px rgba(77,217,192,0.06); }
.work-card-image { width: 100%; height: 220px; background: var(--color-bg-alt); display: flex; align-items: center; justify-content: center; overflow: hidden; }
.work-card-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.work-card:hover .work-card-image img { transform: scale(1.03); }
.work-card-content { padding: 1.5rem; }
.work-card-content h4 { font-size: 1.1rem; margin-bottom: 0.5rem; }
.work-card-content p { color: var(--color-text-muted); font-size: 0.875rem; margin-bottom: 0.75rem; line-height: 1.6; }
.work-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 0.75rem; }
.work-tags span { font-size: 0.65rem; padding: 0.25rem 0.6rem; background: var(--gradient-brand-soft); border: 1px solid var(--color-border); border-radius: 50px; color: var(--color-text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; }
.work-link { font-size: 0.8rem; font-weight: 600; background: var(--gradient-brand); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.case-study-btn { background: transparent; border: 1px solid var(--color-border); color: var(--color-text-muted); font-family: var(--font); font-size: 0.75rem; font-weight: 600; padding: 0.4rem 1rem; border-radius: 50px; cursor: pointer; transition: var(--transition); }
.case-study-btn:hover { border-color: var(--color-accent); color: var(--color-accent); }

/* App screenshot cards */
.work-card-image-app { height: 420px; background: radial-gradient(ellipse at center, rgba(77,217,192,0.06) 0%, var(--color-surface) 70%); display: flex; align-items: center; justify-content: center; }
.work-card-image-app img { width: auto; height: 88%; max-width: 65%; object-fit: contain; border-radius: 16px; box-shadow: 0 16px 48px rgba(0,0,0,0.4); transition: transform 0.5s ease, box-shadow 0.5s ease; }
.work-card:hover .work-card-image-app img { transform: scale(1.02) translateY(-4px); box-shadow: 0 24px 64px rgba(0,0,0,0.5), 0 0 40px rgba(77,217,192,0.08); }
.work-card-image-double { gap: 0.75rem; padding: 1.5rem; }
.work-card-image-double img { width: 42%; height: 85%; max-width: none; margin: 0; border-radius: 14px; }

/* --- Testimonials --- */
.testimonials { padding: 6rem 0; background: var(--color-bg-alt); }
.testimonials-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; margin-top: 3rem; }
.testimonial-card { padding: 2rem; border-radius: var(--radius); background: var(--color-glass); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); border: 1px solid var(--color-border); transition: var(--transition); }
.testimonial-card:hover { border-color: var(--color-border-hover); transform: translateY(-4px); }
.testimonial-quote { color: var(--color-text-muted); font-size: 0.9375rem; line-height: 1.8; margin-bottom: 1.5rem; font-style: italic; }
.testimonial-author { display: flex; align-items: center; gap: 0.75rem; }
.testimonial-avatar { width: 40px; height: 40px; border-radius: 50%; background: var(--gradient-brand); display: flex; align-items: center; justify-content: center; font-size: 0.75rem; font-weight: 700; color: #fff; flex-shrink: 0; }
.testimonial-author strong { display: block; font-size: 0.875rem; }
.testimonial-author span { font-size: 0.75rem; color: var(--color-text-light); }

/* --- About --- */
.about { padding: 6rem 0; position: relative; }
.about::before { content:''; position: absolute; top: 50%; right: 0; width: 35%; height: 35%; background: radial-gradient(ellipse, rgba(167,139,250,0.04) 0%, transparent 70%); pointer-events: none; transform: translateY(-50%); }
.about-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 4rem; align-items: start; }
.about-content p { color: var(--color-text-muted); margin-bottom: 1rem; font-size: 1rem; line-height: 1.8; }
.about-values { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.value-item { padding: 1.5rem; border: 1px solid var(--color-border); border-radius: var(--radius); background: var(--color-surface); transition: var(--transition); }
.value-item:hover { border-color: var(--color-border-hover); transform: translateY(-2px); }
.value-item h4 { font-weight: 700; font-size: 0.95rem; margin-bottom: 0.4rem; }
.value-item p { color: var(--color-text-muted); font-size: 0.8rem; line-height: 1.6; }

/* --- Contact --- */
.contact { padding: 6rem 0; }
.contact-split { display: grid; grid-template-columns: 1fr 1.2fr; gap: 4rem; align-items: start; }
.contact-info-side .contact-description { color: var(--color-text-muted); font-size: 1.05rem; margin-bottom: 2rem; line-height: 1.8; }
.contact-details-list { display: flex; flex-direction: column; gap: 1.5rem; }
.contact-item h4 { font-weight: 700; font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.1em; background: var(--gradient-brand); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; margin-bottom: 0.3rem; }
.contact-item p, .contact-item a { color: var(--color-text-muted); font-size: 0.9rem; }
.contact-item a:hover { color: var(--color-accent); }

/* --- Contact Form --- */
.contact-form { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); padding: 2.5rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; font-size: 0.8rem; font-weight: 600; color: var(--color-text-muted); margin-bottom: 0.5rem; text-transform: uppercase; letter-spacing: 0.05em; }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 0.75rem 1rem; font-family: var(--font); font-size: 0.9rem; background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius-sm); color: var(--color-text); transition: var(--transition); }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: var(--color-accent); box-shadow: 0 0 0 3px rgba(77,217,192,0.1); }
.form-group textarea { resize: vertical; min-height: 100px; }
.form-group select { appearance: none; -webkit-appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2394a3b8' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 1rem center; }

/* Service Pills */
.service-pills { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.pill { cursor: pointer; }
.pill input { display: none; }
.pill span { display: inline-block; padding: 0.5rem 1rem; font-size: 0.8rem; font-weight: 500; border: 1px solid var(--color-border); border-radius: 50px; color: var(--color-text-muted); transition: var(--transition); }
.pill input:checked + span { background: var(--gradient-brand); color: #fff; border-color: transparent; box-shadow: 0 2px 12px rgba(77,217,192,0.2); }
.pill:hover span { border-color: var(--color-accent); color: var(--color-accent); }

/* --- Footer --- */
.footer { padding: 3rem 0 1.5rem; border-top: 1px solid var(--color-border); }
.footer-content { display: flex; flex-direction: column; align-items: center; text-align: center; gap: 1.5rem; }
.footer-brand p { color: var(--color-text-light); font-size: 0.85rem; margin-top: 0.5rem; }
.footer-nav { display: flex; gap: 2rem; flex-wrap: wrap; justify-content: center; }
.footer-nav a { font-size: 0.85rem; color: var(--color-text-muted); }
.footer-nav a:hover { color: var(--color-accent); }
.footer-bottom { padding-top: 1.5rem; border-top: 1px solid var(--color-border); width: 100%; text-align: center; }
.footer-bottom p { font-size: 0.75rem; color: var(--color-text-light); }

/* --- WhatsApp --- */
.whatsapp-btn { position: fixed; bottom: 2rem; right: 2rem; width: 56px; height: 56px; background: #25D366; border-radius: 50%; display: flex; align-items: center; justify-content: center; box-shadow: 0 4px 20px rgba(37,211,102,0.4); z-index: 900; transition: transform 0.3s ease, box-shadow 0.3s ease; }
.whatsapp-btn:hover { transform: scale(1.1); box-shadow: 0 6px 28px rgba(37,211,102,0.5); }

/* --- Privacy Page --- */
.privacy-page { padding-top: calc(6rem + 60px); padding-bottom: 6rem; }
.privacy-updated { font-size: 0.875rem; color: var(--color-text-light); margin-bottom: 3rem; }
.privacy-content h2 { font-size: 1.4rem; margin-top: 3rem; margin-bottom: 1rem; }
.privacy-content p { color: var(--color-text-muted); margin-bottom: 1rem; line-height: 1.8; }
.privacy-content ul { margin-bottom: 1.5rem; padding-left: 1.5rem; }
.privacy-content ul li { color: var(--color-text-muted); margin-bottom: 0.5rem; line-height: 1.7; position: relative; padding-left: 1.25rem; }
.privacy-content ul li::before { content:''; position: absolute; left: 0; top: 0.7em; width: 6px; height: 6px; background: var(--gradient-brand); border-radius: 50%; }
.privacy-content a { color: var(--color-accent); }
.privacy-content a:hover { text-decoration: underline; }

/* --- Animations --- */
.fade-in { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease, transform 0.7s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* --- Nav overlay --- */
.nav-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.6); opacity: 0; visibility: hidden; transition: var(--transition); z-index: 999; }
.nav-overlay.active { opacity: 1; visibility: visible; }

/* --- Responsive --- */
@media (max-width: 1024px) {
    .services-grid { grid-template-columns: repeat(2, 1fr); }
    .process-grid { grid-template-columns: repeat(2, 1fr); }
    .portfolio-grid { grid-template-columns: repeat(2, 1fr); }
    .testimonials-grid { grid-template-columns: repeat(2, 1fr); }
    .about-grid { grid-template-columns: 1fr; gap: 3rem; }
    .contact-split { grid-template-columns: 1fr; gap: 3rem; }
}

@media (max-width: 768px) {
    .nav-toggle { display: flex; }
    .nav-links { position: fixed; top: 0; right: -100%; width: 80%; max-width: 320px; height: 100vh; background: var(--color-bg); flex-direction: column; align-items: flex-start; padding: 5rem 2rem 2rem; gap: 1rem; border-left: 1px solid var(--color-border); transition: right 0.4s cubic-bezier(0.4,0,0.2,1); z-index: 1001; }
    .nav-links.active { right: 0; }
    .nav-links a { font-size: 1.1rem; padding: 0.5rem 0; }
    .hero { min-height: 85vh; padding-top: 5rem; }
    .hero h1 { font-size: 2rem; }
    .hero-description { font-size: 1rem; }
    .hero-cta { flex-direction: column; }
    .hero-cta .btn { text-align: center; }
    .hero-scroll { display: none; }
    .services-grid, .process-grid, .portfolio-grid, .testimonials-grid { grid-template-columns: 1fr; }
    .about-values { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .footer-nav { flex-direction: column; align-items: center; gap: 0.75rem; }
    .logo-img { height: 44px; }
    .work-card-image-app { height: 360px; }
    .whatsapp-btn { bottom: 1.25rem; right: 1.25rem; width: 50px; height: 50px; }
    .whatsapp-btn svg { width: 24px; height: 24px; }
    .portfolio-tabs { gap: 0.4rem; }
    .tab-btn { padding: 0.5rem 1rem; font-size: 0.7rem; }
}

@media (max-width: 480px) {
    .container { padding: 0 1rem; }
    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }
    .btn { padding: 0.75rem 1.5rem; width: 100%; }
    .work-card-image { height: 180px; }
    .work-card-image-app { height: 300px; }
    .work-card-image-app img { max-width: 75%; height: 82%; }
    .contact-form { padding: 1.5rem; }
}

/* Focus & Print */
a:focus-visible, button:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 3px; }
@media print { .navbar, .hero-scroll, .nav-toggle, .whatsapp-btn, .tech-marquee { display: none; } body { background: #fff; color: #000; } }


/* --- Privacy page extras --- */
.privacy-intro { font-size: 1.15rem; color: var(--color-text); margin-bottom: 2.5rem; line-height: 1.8; }
.privacy-back { margin-top: 3rem; padding-top: 2rem; border-top: 1px solid var(--color-border); }
.footer-legal { display: flex; gap: 2rem; flex-wrap: wrap; justify-content: center; margin-top: 0.5rem; }
.footer-legal a { font-size: 0.8rem; color: var(--color-text-light); }
.footer-legal a:hover { color: var(--color-accent); }