/* styles.css - Simple, modern UX portfolio */
/* Use system fonts, responsive layout, accessible focus states */

:root{
  --bg: #ffffff;
  --muted: #6b7280;
  --accent: #111827;
  --card: #f8fafc;
  --radius: 10px;
  --container: 1100px;
  --gap: 20px;
}

* {box-sizing: border-box;}
html,body {height:100%;}
body{
  margin:0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  background:var(--bg);
  color:var(--accent);
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

/* Utility container */
.container{
  width: calc(100% - 40px);
  max-width: var(--container);
  margin: 0 auto;
  padding: 40px 0;
}

/* Header */
.site-header{
  border-bottom: 1px solid #e6e9ee;
  background: #fff;
  position: sticky;
  top: 0;
  z-index: 30;
}

.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 16px;
  padding: 12px 0;
}

/* Brand */
.brand{
  font-weight:700;
  text-decoration:none;
  color:var(--accent);
  font-size:18px;
}

/* Nav */
.site-nav ul{
  display:flex;
  list-style:none;
  gap: 18px;
  margin:0;
  padding:0;
  align-items:center;
}

.site-nav a{
  text-decoration:none;
  color:var(--accent);
  font-weight:500;
  padding:8px 10px;
  border-radius:8px;
}

.site-nav a:focus,
.site-nav a:hover{
  background: #f1f5f9;
  outline: none;
}

.cta{
  border:1px solid #e6e9ee;
  padding:8px 12px;
}

/* Mobile hamburger (checkbox hack) */
.nav-toggle{
  display:none;
}
.nav-toggle-label{
  display:none;
  width:36px;
  height:36px;
  border-radius:8px;
  align-items:center;
  justify-content:center;
  cursor:pointer;
}
.nav-toggle-label span,
.nav-toggle-label span::before,
.nav-toggle-label span::after{
  display:block;
  background:var(--accent);
  height:2px;
  width:18px;
  border-radius:2px;
  position:relative;
}
.nav-toggle-label span::before,
.nav-toggle-label span::after{
  content:"";
  position:absolute;
  left:0;
}
.nav-toggle-label span::before{ top:-6px; }
.nav-toggle-label span::after{ top:6px; }

/* Hero */
.hero{
  background: linear-gradient(180deg,#fff 0%, #fbfdff 100%);
  padding: 80px 0;
}
.hero .lead{
  color:var(--muted);
  max-width: 60ch;
  margin-top: 8px;
}
.primary-btn{
  display:inline-block;
  padding:12px 18px;
  border-radius:10px;
  background:#111827;
  color:#fff;
  text-decoration:none;
  margin-top:16px;
}

/* Sections */
.section-title{
  margin:0 0 18px 0;
}

/* Grid for work */
.grid{
  display:grid;
  grid-template-columns: repeat(3,1fr);
  gap:var(--gap);
}

/* Card */
.card{
  background:var(--card);
  border-radius:var(--radius);
  overflow:hidden;
  box-shadow: 0 6px 18px rgba(15,23,42,0.04);
}
.card img{
  width:100%;
  height:160px;
  object-fit:cover;
  display:block;
}
.card-content{
  padding:14px;
}
.card h3{
  margin:0 0 6px 0;
  font-size:16px;
}
.muted{ color:var(--muted); font-size:14px; margin:0; }

/* About grid */
.about-grid{
  display:grid;
  grid-template-columns: 1fr 320px;
  gap: 28px;
  align-items:start;
}
.contact-card{
  background:#fff;
  border:1px solid #eef2f7;
  padding:16px;
  border-radius:10px;
}

/* Footer */
.site-footer{
  border-top:1px solid #e6e9ee;
  padding:24px 0;
  background:#fff;
}
.footer-inner{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:16px;
}
.social{ list-style:none; display:flex; gap:12px; margin:0; padding:0;}

/* Buttons */
.secondary-btn{
  display:inline-block;
  padding:8px 12px;
  border-radius:8px;
  border:1px solid #e6e9ee;
  text-decoration:none;
  color:var(--accent);
}

/* Modal overlays using :target */
.modal{
  position:fixed;
  inset:0;
  display:none;
  background: rgba(12,14,18,0.5);
  padding:40px;
  z-index:60;
}
.modal:target{
  display:block;
}
.modal-panel{
  background:#fff;
  max-width:900px;
  margin: 40px auto;
  padding:24px;
  border-radius:12px;
  box-shadow: 0 12px 40px rgba(2,6,23,0.2);
}
.modal-close{
  float:right;
  text-decoration:none;
  color:var(--muted);
}

/* Responsive adjustments */
@media (max-width: 980px){
  .grid{ grid-template-columns: repeat(2,1fr); }
  .about-grid{ grid-template-columns: 1fr; }
  .container{ padding: 28px; }
}

@media (max-width: 640px){
  .grid{ grid-template-columns: 1fr; gap:14px; }
  .hero{ padding: 36px 0; }
  .header-inner{ padding: 10px 0; }

  /* Show hamburger, hide full nav */
  .nav-toggle{ display:block; }
  .nav-toggle-label{ display:flex; }
  .site-nav{
    position: absolute;
    right: 20px;
    top: 68px;
    background: white;
    border:1px solid #eef2f7;
    border-radius:10px;
    padding: 10px;
    display:none;
    min-width: 160px;
  }
  .site-nav ul{ flex-direction:column; gap:8px; }
  /* Toggle open */
  .nav-toggle:checked ~ .site-nav{ display:block; }

  .container{ width: calc(100% - 32px); padding: 20px 0; }
}

/* Focus states for keyboard users */
a:focus, button:focus, input:focus {
  outline: 3px solid rgba(59,130,246,0.25);
  outline-offset: 2px;
  border-radius: 6px;
}