/* about.css — Landing page styles */
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'Inter',system-ui,-apple-system,sans-serif;background:#0a0a1a;color:#e0e0e0;line-height:1.6}

/* Header */
.about-header{position:sticky;top:0;z-index:100;background:rgba(10,10,26,0.9);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid #1a1a3e}
.about-header-inner{max-width:1200px;margin:0 auto;padding:1rem 2rem;display:flex;align-items:center;justify-content:space-between}
.about-logo{font-size:1.4rem;font-weight:700;color:#60a5fa;text-decoration:none}
.about-nav{display:flex;gap:1.5rem}
.about-nav a{color:#a0a0c0;text-decoration:none;font-size:0.95rem;transition:color .2s;min-height:44px;display:flex;align-items:center}
.about-nav a:hover,.about-nav a.active{color:#60a5fa}

/* Hero */
.hero{padding:6rem 2rem 4rem;text-align:center;background:linear-gradient(180deg,#0a0a1a 0%,#0f1629 100%)}
.hero-inner{max-width:800px;margin:0 auto}
.hero-title{font-size:3.5rem;font-weight:800;background:linear-gradient(135deg,#60a5fa,#a78bfa);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:0.5rem}
.hero-subtitle{font-size:1.3rem;color:#a0a0c0;margin-bottom:1.5rem;font-weight:300}
.hero-desc{font-size:1.05rem;color:#c0c0d0;max-width:600px;margin:0 auto 2rem}
.hero-actions{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}
.btn-primary{display:inline-flex;align-items:center;justify-content:center;padding:0.75rem 2rem;background:linear-gradient(135deg,#60a5fa,#a78bfa);color:#fff;border-radius:12px;text-decoration:none;font-weight:600;transition:opacity .2s;min-height:44px}
.btn-primary:hover{opacity:0.85}
.btn-secondary{display:inline-flex;align-items:center;justify-content:center;padding:0.75rem 2rem;background:transparent;color:#60a5fa;border:1px solid #60a5fa;border-radius:12px;text-decoration:none;font-weight:600;transition:background .2s;min-height:44px}
.btn-secondary:hover{background:rgba(96,165,250,0.1)}

/* Section titles */
.section-title{text-align:center;font-size:2rem;font-weight:700;margin-bottom:2.5rem;color:#e0e0e0}

/* Features */
.features{padding:4rem 2rem;max-width:1200px;margin:0 auto}
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1.5rem}
.feature-card{background:#12122a;border:1px solid #1a1a3e;border-radius:12px;padding:2rem;transition:transform .2s,border-color .2s}
.feature-card:hover{transform:translateY(-2px);border-color:#60a5fa}
.feature-icon{font-size:2.5rem;margin-bottom:1rem}
.feature-card h3{font-size:1.15rem;color:#e0e0e0;margin-bottom:0.75rem}
.feature-card p{font-size:0.9rem;color:#a0a0c0;line-height:1.7}

/* Tech stack */
.tech-stack{padding:4rem 2rem;background:#0f1629;max-width:1200px;margin:0 auto}
.tech-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1rem;max-width:900px;margin:0 auto}
.tech-item{display:flex;flex-direction:column;padding:1.25rem;background:#12122a;border:1px solid #1a1a3e;border-radius:12px}
.tech-item strong{color:#60a5fa;font-size:0.85rem;text-transform:uppercase;letter-spacing:0.5px;margin-bottom:0.25rem}
.tech-item span{color:#c0c0d0;font-size:0.95rem}

/* Categories */
.categories-section{padding:4rem 2rem;max-width:1200px;margin:0 auto}
.cat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1rem}
.cat-item{padding:1.5rem;background:#12122a;border:1px solid #1a1a3e;border-radius:12px;font-size:1.05rem;color:#e0e0e0}
.cat-emoji{font-size:1.5rem;margin-right:0.5rem}
.cat-item small{color:#808090;font-size:0.8rem;display:block;margin-top:0.5rem}

/* Footer */
.about-footer{padding:3rem 2rem;border-top:1px solid #1a1a3e;text-align:center;background:#0a0a1a}
.footer-inner{max-width:800px;margin:0 auto}
.about-footer p{color:#606080;font-size:0.9rem}
.footer-links{margin-top:1rem;display:flex;gap:1.5rem;justify-content:center}
.footer-links a{color:#808090;text-decoration:none;transition:color .2s;min-height:44px;display:flex;align-items:center}
.footer-links a:hover{color:#60a5fa}

/* ===== Responsive — Tablet ===== */
@media(max-width:768px){
  .hero{padding:4rem 1.5rem 3rem}
  .hero-title{font-size:2.5rem}
  .hero-subtitle{font-size:1.05rem}
  .about-header-inner{padding:0.75rem 1rem}
  .about-nav{gap:1rem}
  .features,.tech-stack,.categories-section{padding:3rem 1rem}
  .feature-grid{grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1rem}
  .section-title{font-size:1.6rem;margin-bottom:2rem}
}

/* ===== Responsive — Mobile ===== */
@media(max-width:480px){
  .hero{padding:3rem 1rem 2.5rem}
  .hero-title{font-size:2rem}
  .hero-subtitle{font-size:0.95rem}
  .hero-desc{font-size:0.95rem}
  .about-header-inner{padding:0.5rem 0.75rem;flex-direction:column;gap:0.5rem}
  .about-nav{gap:0.75rem}
  .about-nav a{font-size:0.85rem}
  .features,.tech-stack,.categories-section{padding:2rem 0.75rem}
  .feature-grid,.tech-grid,.cat-grid{grid-template-columns:1fr}
  .feature-card{padding:1.5rem}
  .section-title{font-size:1.4rem;margin-bottom:1.5rem}
  .footer-links{flex-direction:column;gap:0.75rem;align-items:center}
}