/* KU Buddy — responsive clean styles */

/* Variables */
:root{
  --bg:#F1FBF5;
  --card:#FFFFFF;
  --accent:#2E7D32; /* green */
  --accent-2:#1B5E20;
  --muted:#4B4B4B;
  --radius:12px;
  --container:1100px;
  --text:#111; /* added for social button text */
}

/* Base reset */
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:"Poppins","Inter",Arial,sans-serif;
  background:var(--bg);
  color:var(--muted);
  -webkit-font-smoothing:antialiased;
}

/* Layout container */
.container{max-width:var(--container);margin:0 auto;padding:0 20px}

/* NAVBAR */
.navbar{position:sticky;top:0;background:linear-gradient(90deg,var(--accent),var(--accent-2));color:#fff;z-index:1000;box-shadow:0 6px 24px rgba(27,94,32,0.08)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;padding:12px 0;gap:12px}
.brand{display:flex;align-items:center;gap:12px}
.logo-img{width:48px;height:48px;border-radius:10px;object-fit:cover;border:2px solid rgba(255,255,255,0.12)}
.brand-text{font-weight:700;font-size:1.1rem;color:#fff}

/* menu toggle for mobile */
.menu-toggle{display:none;background:transparent;border:0;cursor:pointer;padding:6px}
.menu-toggle span{display:block;width:22px;height:2px;background:#fff;margin:4px 0;border-radius:2px}

/* nav list */
.nav{display:flex;align-items:center}
.nav-list{display:flex;gap:16px;list-style:none;margin:0;padding:0}
.nav-list a{color:#fff;text-decoration:none;font-weight:600;padding:8px 10px;border-radius:8px}
.nav-list a:hover{background:rgba(255,255,255,0.08)}

/* HERO */
.hero{padding:48px 0}
.hero-inner{display:flex;gap:28px;align-items:center}
.hero-text{flex:1}
.hero-text h1{margin:0;font-size:2rem;color:var(--accent-2)}
.subtitle{margin:10px 0;font-size:1.05rem;color:var(--muted)}
.hero-visual{flex:0 0 260px;display:flex;justify-content:center}
.hero-phone{width:220px;border-radius:18px;box-shadow:0 18px 50px rgba(0,0,0,0.08);}

/* Buttons */
.btn-primary,.btn-secondary{
  display:inline-block;text-decoration:none;padding:12px 20px;border-radius:999px;font-weight:700;
}
.btn-primary{
  background:linear-gradient(90deg,var(--accent),var(--accent-2));
  color:#fff;
  box-shadow:0 12px 30px rgba(46,125,50,0.12);
  transition:all .18s ease;
}
.btn-primary:hover{transform:translateY(-4px)}
.btn-secondary{background:#fff;color:var(--accent-2);border:1px solid rgba(0,0,0,0.04)}

/* FEATURES */
.features{padding:36px 0}
.features h2{text-align:center;color:var(--accent-2);margin-bottom:18px}
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px}
.feature-item{background:var(--card);padding:18px;border-radius:12px;box-shadow:0 10px 30px rgba(0,0,0,0.05);text-align:center}
.feature-item i{font-size:28px;color:var(--accent);margin-bottom:10px}
.feature-item h3{margin:8px 0;color:var(--accent-2)}

/* SCREENSHOTS */
.screenshots{padding:22px 0}
.screenshot-container{overflow-x:auto;padding-bottom:10px}
.screenshot-grid{display:flex;gap:14px}
.screenshot{flex:0 0 auto;width:200px;border-radius:12px;box-shadow:0 10px 30px rgba(0,0,0,0.06);cursor:pointer;transition:transform .18s}
.screenshot:hover{transform:translateY(-6px)}

/* DOWNLOAD CTA */
.download-section{padding:28px 0;text-align:center}
.download-section .lead{max-width:820px;margin:10px auto 18px;color:var(--muted)}

/* CONTACT / SOCIAL */
.socials{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  align-items:center;
  gap:14px;
  margin-top:20px;
}

.btn-social{
  display:inline-flex;
  align-items:center;
  gap:10px;
  text-decoration:none;
  padding:12px 20px;
  border-radius:999px;
  font-weight:700;
  background:linear-gradient(90deg,var(--accent),var(--accent-2));
  color:#fff;
  box-shadow:0 10px 26px rgba(46,125,50,0.12);
  transition:transform .18s ease, box-shadow .18s ease;
}

.btn-social:hover{
  transform:translateY(-4px);
  box-shadow:0 20px 50px rgba(46,125,50,0.16);
}

.btn-social .social-tag{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-width:36px;
  height:36px;
  border-radius:999px;
  background:#fff;
  color:var(--accent-2);
  font-weight:800;
  font-size:0.92rem;
}

.btn-social .social-text{
  color:#fff;
  font-size:0.95rem;
  white-space:nowrap;
}

.btn-social:focus{
  outline:3px solid rgba(46,125,50,0.25);
  outline-offset:4px;
}

/* Small screen */
@media(max-width:480px){
  .btn-social{padding:10px 14px;font-size:0.9rem}
  .btn-social .social-text{display:none}
}

/* Modal */
.modal{position:fixed;inset:0;display:none;align-items:center;justify-content:center;background:rgba(0,0,0,0.72);z-index:2000;padding:18px}
.modal.open{display:flex}
.modal-image{max-width:95%;max-height:85vh;border-radius:12px;box-shadow:0 30px 80px rgba(0,0,0,0.6)}
.modal-close{position:absolute;top:20px;right:20px;background:transparent;border:0;color:#fff;font-size:40px;cursor:pointer}

/* Footer */
.site-footer{padding:24px 0;text-align:center;color:var(--muted);font-size:0.95rem}

/* Responsive */
@media(max-width:900px){
  .hero-inner{flex-direction:column-reverse;text-align:center}
  .hero-visual{width:160px}
  .menu-toggle{display:block}
  .nav-list{display:none;position:absolute;right:20px;top:68px;background:var(--card);color:var(--muted);padding:12px;border-radius:10px;box-shadow:0 12px 40px rgba(0,0,0,0.08)}
  .nav-list.show{display:flex;flex-direction:column;gap:10px}
}
@media(max-width:480px){
  .hero-text h1{font-size:1.4rem}
  .screenshot{width:160px}
  .logo-img{width:40px;height:40px}
}