/* Base styles for iOS Developer portfolio
   - Uses system fonts for a native feel
   - Includes responsive layout, accessible color contrasts, and a theme toggle
*/

/* ========= Variables ========= */
:root{
  --bg: #f7f7f8;
  --card: #ffffff;
  --muted: #6b6f74;
  --text: #0b0b0b;
  --primary: #0a84ff; /* iOS blue */
  --glass: rgba(255,255,255,0.6);

  --radius: 12px;
  --shadow: 0 6px 18px rgba(16,24,40,0.08);
  --container: 1100px;
  --gap: 1.25rem;
}

/* Dark theme */
:root[data-theme="dark"]{
  --bg: #0b0b0c;
  --card: #0f1113;
  --muted: #9aa0a6;
  --text: #e6e7e9;
  --primary: #0a84ff;
  --glass: rgba(255,255,255,0.03);
  --shadow: 0 6px 20px rgba(0,0,0,0.6);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  background: radial-gradient(1200px 600px at 10% 10%, rgba(10,132,255,0.04), transparent),
              radial-gradient(900px 400px at 90% 90%, rgba(10,132,255,0.03), transparent),
              var(--bg);
  color:var(--text);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  line-height:1.5;
  padding-bottom:4rem;
}

/* Container */
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:1.5rem;
}

/* Header */
.site-header{
  position:sticky;
  top:0;
  backdrop-filter: blur(6px);
  background: linear-gradient(to right, rgba(255,255,255,0.4), rgba(255,255,255,0.15));
  border-bottom: 1px solid rgba(0,0,0,0.04);
  z-index:20;
}
:root[data-theme="dark"] .site-header{
  background: linear-gradient(to right, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  border-bottom: 1px solid rgba(255,255,255,0.03);
}

.header-inner{
  display:flex;
  gap:1rem;
  align-items:center;
  justify-content:space-between;
}

/* Brand */
.brand{
  display:flex;
  gap:.6rem;
  align-items:center;
  text-decoration:none;
  color:var(--text);
}
.logo{color:var(--primary)}
.brand-text{font-weight:600;letter-spacing:-0.02em}

/* Nav */
.nav{display:flex;gap:0.8rem;align-items:center}
.nav a{
  color:var(--muted);
  text-decoration:none;
  padding:.45rem .6rem;
  border-radius:8px;
  font-weight:500;
}
.nav a:hover{color:var(--text);background:var(--glass)}

/* Header actions */
.header-actions{display:flex;gap:0.5rem;align-items:center}
.icon-btn{
  background:transparent;border:0;padding:.4rem;border-radius:8px;font-size:1.05rem;
  cursor:pointer;color:var(--muted)
}
.icon-btn:hover{background:var(--glass);color:var(--text)}

/* Hero */
.hero{
  display:grid;
  grid-template-columns: 1fr 380px;
  gap:2rem;
  align-items:center;
  padding-top:2.5rem;
  padding-bottom:2.5rem;
}
@media (max-width:980px){
  .hero{grid-template-columns:1fr; padding-top:2rem}
}

.hero h1{
  font-size:2.2rem;
  margin:0 0 0.6rem 0;
  letter-spacing:-0.01em;
}
.lead{color:var(--muted);margin:0 0 1rem 0;max-width:60ch}

.hero-cta{display:flex;gap:0.6rem;margin-bottom:1rem}
.btn{
  display:inline-flex;align-items:center;gap:.5rem;padding:.6rem .9rem;border-radius:10px;border:1px solid transparent;font-weight:600;text-decoration:none;cursor:pointer;
}
.btn.primary{
  background:linear-gradient(180deg,var(--primary),#0067d9);color:white;box-shadow:0 6px 22px rgba(10,132,255,0.12);
}
.btn.ghost{
  background:transparent;border:1px solid rgba(0,0,0,0.06);color:var(--text)
}
:root[data-theme="dark"] .btn.ghost{border:1px solid rgba(255,255,255,0.04)}

/* meta list */
.meta-list{list-style:none;padding:0;margin:0;display:flex;gap:1.2rem;color:var(--muted);font-size:0.95rem}

/* Device preview card */
.hero-card{display:flex;justify-content:center;align-items:center}
.device{
  width:240px;height:480px;border-radius:34px;box-shadow:var(--shadow);background:linear-gradient(180deg,var(--card),rgba(255,255,255,0.02));border:1px solid rgba(0,0,0,0.04);overflow:hidden;display:flex;flex-direction:column;align-items:center;padding:12px;
}
:root[data-theme="dark"] .device{border:1px solid rgba(255,255,255,0.03)}
.screen{
  width:100%;height:100%;background:linear-gradient(180deg,rgba(10,132,255,0.02),transparent);border-radius:20px;padding:18px;display:flex;align-items:center;justify-content:center;
}
.app-sample{text-align:center;color:var(--muted)}
.device-stand{width:120px;height:10px;border-radius:6px;margin-top:10px;background:linear-gradient(180deg,rgba(0,0,0,0.06),transparent)}

/* Sections */
.section{padding:2rem 0;border-top:1px dashed rgba(0,0,0,0.03)}
:root[data-theme="dark"] .section{border-top-color:rgba(255,255,255,0.02)}

.section h2{margin:0 0 1rem 0;font-size:1.3rem}
.muted{color:var(--muted)}

/* Grids */
.grid{display:grid;gap:1rem}
.about-grid{grid-template-columns:2fr 1fr}
@media (max-width:800px){.about-grid{grid-template-columns:1fr}}

.stats{background:var(--card);padding:1rem;border-radius:12px;box-shadow:var(--shadow)}
.stat{display:flex;flex-direction:column;gap:.25rem;padding:.6rem 0}
.stat strong{font-size:1.25rem}
.stat span{color:var(--muted);font-size:.95rem}

/* Skills */
.skills-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0.9rem}
@media (max-width:900px){.skills-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:520px){.skills-grid{grid-template-columns:1fr}}

.skill{background:var(--card);padding:1rem;border-radius:12px;box-shadow:var(--shadow)}
.skill h4{margin:0 0 .4rem 0}
.skill p{margin:0;color:var(--muted)}

/* Projects */
.projects-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}
@media (max-width:1100px){.projects-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:700px){.projects-grid{grid-template-columns:1fr}}

.project-card{
  background:linear-gradient(180deg,var(--card),transparent);
  padding:1rem;border-radius:14px;box-shadow:var(--shadow);border:1px solid rgba(0,0,0,0.03);
}
.project-meta{display:flex;gap:.4rem;margin-bottom:.4rem}
.tag{background:rgba(10,132,255,0.08);color:var(--primary);padding:.18rem .45rem;border-radius:8px;font-size:.8rem}
.project-card h3{margin:.2rem 0 .35rem 0}
.project-footer{display:flex;justify-content:space-between;align-items:center;margin-top:.75rem}
.link{color:var(--primary);text-decoration:none;font-weight:600}

/* Timeline */
.timeline{display:flex;flex-direction:column;gap:1rem}
.timeline-item{display:flex;gap:1rem}
.timeline-date{min-width:110px;color:var(--muted);font-weight:600}
.timeline-body{background:var(--card);padding:1rem;border-radius:12px;box-shadow:var(--shadow);flex:1}

/* Contact */
.contact-grid{grid-template-columns:1fr 420px;display:grid;gap:1rem}
@media (max-width:980px){.contact-grid{grid-template-columns:1fr}}

.contact-card{background:var(--card);padding:1rem;border-radius:12px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:.6rem}
.contact-card label{display:flex;flex-direction:column;font-size:.95rem;color:var(--muted)}
.contact-card input, .contact-card textarea{
  margin-top:.4rem;padding:.6rem;border-radius:8px;border:1px solid rgba(0,0,0,0.06);background:transparent;color:var(--text)
}
:root[data-theme="dark"] .contact-card input, :root[data-theme="dark"] .contact-card textarea{border:1px solid rgba(255,255,255,0.03)}
.contact-card textarea{min-height:90px;resize:vertical}

.form-actions{display:flex;gap:.5rem;justify-content:flex-end}

/* Footer */
.site-footer{position:relative;margin-top:3rem;padding:1.25rem 0;color:var(--muted)}
.footer-inner{display:flex;justify-content:space-between;align-items:center;gap:1rem}
.footer-nav a{color:var(--muted);text-decoration:none;padding:.25rem .5rem;border-radius:8px}
.footer-nav a:hover{color:var(--text)}

/* Utility */
.card{background:var(--card);padding:1rem;border-radius:12px;box-shadow:var(--shadow)}
.center{display:flex;align-items:center;justify-content:center}

/* Small improvements */
a{color:inherit}
button{font:inherit}

/* Focus states */
a:focus, button:focus, input:focus, textarea:focus{outline:3px solid color-mix(in srgb, var(--primary) 24%, transparent);outline-offset:2px}

/* Respect system preference if user has not toggled */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]){ --bg: #0b0b0c; --card: #0f1113; --muted:#9aa0a6; --text:#e6e7e9; --glass: rgba(255,255,255,0.03);}
}