:root{
  --bg: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 50%, #e2e8f0 100%);
  --bg-solid: #f8fafc;
  --text: #0f172a;
  --muted: #475569;
  --card: rgba(255, 255, 255, 0.8);
  --card-hover: rgba(255, 255, 255, 0.95);
  --border: #e2e8f0;
  --accent: #2563eb;
  --accent-light: #3b82f6;
  --accent-gradient: linear-gradient(135deg, #2563eb 0%, #3b82f6 100%);
  --chip-bg: #eef2ff;
  --chip-text: #1e3a8a;
  --shadow: 0 8px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 20px 40px rgba(0,0,0,0.12);
  --hero-accent: #f0f7ff;
}

@media (prefers-color-scheme: dark){
  :root{
    --bg: linear-gradient(135deg, #0b1220 0%, #0f172a 50%, #1e293b 100%);
    --bg-solid: #0b1220;
    --text: #e5e7eb;
    --muted: #94a3b8;
    --card: rgba(15, 23, 42, 0.8);
    --card-hover: rgba(15, 23, 42, 0.95);
    --border: #1f2937;
    --accent: #60a5fa;
    --accent-light: #93c5fd;
    --accent-gradient: linear-gradient(135deg, #60a5fa 0%, #93c5fd 100%);
    --chip-bg: #1e293b;
    --chip-text: #c7d2fe;
    --shadow: 0 10px 30px rgba(0,0,0,0.35);
    --shadow-lg: 0 25px 50px rgba(0,0,0,0.45);
    --hero-accent: #0f1729;
  }
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, Noto Sans, 'Apple Color Emoji', 'Segoe UI Emoji';
  color:var(--text);
  background:var(--bg);
  background-attachment: fixed;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1{font-size:36px; letter-spacing:-0.02em; line-height:1.2}
h2{font-size:28px; letter-spacing:-0.01em; line-height:1.25}
h3{font-size:22px}
p, li{font-size:16px}

.container{max-width:1080px; margin:0 auto; padding:0 20px}
.section{padding:80px 0; position: relative;}
.section:nth-child(even){
  background: color-mix(in oklab, var(--bg-solid) 98%, var(--accent) 2%);
}
.section header{margin-bottom:24px}
.section p.lead{color:var(--muted)}

a{color:var(--accent); text-decoration: none; position: relative}
a::after{
  content:""; position:absolute; left:0; bottom:-2px; height:2px; width:100%;
  background:currentColor; transform:scaleX(0); transform-origin:left; transition:transform 160ms ease-out;
}
a:hover::after{transform:scaleX(1)}

.btn{
  display:inline-flex; align-items:center; gap:.5rem;
  padding:.7rem 1rem; border-radius:12px; border:1px solid var(--border);
  background:var(--card); color:var(--text); text-decoration:none;
  box-shadow:var(--shadow); transition:all 200ms ease;
  backdrop-filter: blur(10px);
}
.btn:hover{ 
  transform:translateY(-2px); 
  box-shadow:var(--shadow-lg);
  background:var(--card-hover);
}
.btn.primary{ 
  background:var(--accent-gradient); 
  color:white; 
  border-color:transparent;
  box-shadow:0 8px 24px rgba(37, 99, 235, 0.25);
}
.btn.primary:hover{
  box-shadow:0 16px 32px rgba(37, 99, 235, 0.35);
}
.btn .icon{ width:18px; height:18px }

/* Resume Dropdown */
.resume-dropdown-container{
  position: relative;
  display: inline-block;
}
.resume-dropdown{
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 280px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(10px);
  z-index: 1000;
  margin-top: 8px;
  overflow: hidden;
}
.resume-option{
  padding: 12px 16px;
  cursor: pointer;
  transition: all 150ms ease;
  border-bottom: 1px solid var(--border);
}
.resume-option:last-child{
  border-bottom: none;
}
.resume-option:hover{
  background: var(--accent);
  color: white;
}
.resume-option strong{
  display: block;
  margin-bottom: 4px;
  font-size: 14px;
}
.resume-option .resume-desc{
  font-size: 12px;
  opacity: 0.8;
}

/* Header / nav */
.skip-link{
  position:absolute; left:-9999px; top:auto; width:1px; height:1px; overflow:hidden;
}
.skip-link:focus{ position:fixed; left:16px; top:16px; width:auto; height:auto; padding:8px 12px; background:var(--accent); color:#fff; border-radius:8px; z-index:10000}

.header{
  position:sticky; top:0; z-index:9999; backdrop-filter:saturate(180%) blur(20px);
  background: color-mix(in oklab, var(--bg-solid) 85%, transparent);
  border-bottom:1px solid var(--border);
  box-shadow: 0 4px 16px rgba(0,0,0,0.05);
}
.nav{
  display:flex; align-items:center; justify-content:space-between; gap:12px;
  padding:14px 0;
}
.nav .brand{ 
  font-weight:700; 
  letter-spacing:.2px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.nav .brand .profile-photo{
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--accent);
  transition: all 200ms ease;
}
.nav .brand .profile-photo:hover{
  transform: scale(1.05);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}
.nav ul{ display:flex; gap:16px; list-style:none; margin:0; padding:0 }
.nav a{
  padding:8px 12px; 
  border-radius:10px; 
  color:var(--muted);
  transition: all 200ms ease;
  position: relative;
  font-weight: 500;
}
.nav a:hover{
  color:var(--text);
  background: color-mix(in oklab, var(--card) 80%, transparent);
}
.nav a.active, .nav a:focus-visible{
  outline:none; 
  color:white; 
  background:var(--accent-gradient); 
  border:1px solid var(--accent);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
  font-weight: 600;
}
.nav a.active::after{
  content: none; /* Remove underline for active nav items */
}

/* Hero */
.hero{
  display:grid; grid-template-columns:1.2fr .8fr; gap:32px; align-items:center; padding-top:32px;
  position: relative;
}
.hero::before{
  content: '';
  position: absolute;
  top: -100px;
  right: -50px;
  width: 300px;
  height: 300px;
  background: var(--accent-gradient);
  border-radius: 50%;
  opacity: 0.03;
  z-index: -1;
}
.hero-intro{
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 16px;
}
.hero-profile-photo{
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--accent);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.2);
  transition: all 300ms ease;
  flex-shrink: 0;
}
.hero-profile-photo:hover{
  transform: scale(1.05);
  box-shadow: 0 12px 32px rgba(37, 99, 235, 0.3);
}
.hero-text{
  flex: 1;
}
@media (max-width:900px){ 
  .hero{ grid-template-columns:1fr }
  .hero::before{ width: 200px; height: 200px; top: -50px; right: -25px; }
  .hero-intro{ flex-direction: column; text-align: center; gap: 16px; }
  .hero-profile-photo{ width: 100px; height: 100px; }
}
@media (max-width:600px){
  .hero-intro{ gap: 12px; }
  .hero-profile-photo{ width: 70px; height: 70px; }
}
.kicker{ color:var(--muted); margin-bottom:6px }
.hero-actions{ display:flex; gap:12px; flex-wrap:wrap; margin-top:16px }
.socials{ display:flex; gap:10px; margin-top:8px }
.icon-btn{
  display:inline-flex; align-items:center; justify-content:center;
  width:40px; height:40px; border-radius:12px; border:1px solid var(--border);
  background:var(--card); color:var(--text); transition:all 200ms ease;
  backdrop-filter: blur(10px);
}
.icon-btn:hover{ 
  transform:translateY(-2px);
  background:var(--card-hover);
  box-shadow:var(--shadow);
}

/* Cards */
.grid{ display:grid; grid-template-columns:repeat(12,1fr); gap:16px }
.card{
  grid-column: span 12;
  border:1px solid var(--border); 
  background:var(--card); 
  border-radius:16px; 
  padding:20px;
  box-shadow:var(--shadow); 
  transition:all 200ms ease;
  backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
}
.card::before{
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 200ms ease;
}
.card:hover{ 
  transform:translateY(-4px);
  box-shadow:var(--shadow-lg);
  background:var(--card-hover);
}
.card:hover::before{
  transform: scaleX(1);
}
@media (min-width:640px){ .col-6{ grid-column: span 6 } }
@media (min-width:980px){ .col-4{ grid-column: span 4 } }

.card h3{ margin:0 0 8px 0 }
.card .meta{ color:var(--muted); font-size:14px }
.card .chips{ display:flex; flex-wrap:wrap; gap:8px; margin-top:10px }
.chip{
  font-size:12px; 
  padding:6px 10px; 
  border-radius:999px; 
  background:var(--chip-bg); 
  color:var(--chip-text);
  border:1px solid color-mix(in oklab, var(--accent) 30%, transparent);
  transition: all 150ms ease;
}
/* Remove general chip hover - will add specific hover for certifications only */

/* Achievements specific styling for better spacing */
/* container of badges */
#achievements.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;         /* handles spacing */
  margin-top: 12px; /* keep */
}

/* each badge */
#achievements .chip {
  display: inline-flex;          /* keeps pill as one unit */
  align-items: center;
  white-space: nowrap;           /* no breaks inside the pill */
  word-break: keep-all;          /* avoid splitting on hyphens etc. */
  overflow-wrap: normal;
  margin: 0;                     /* remove extra margin, gap covers it */
}

/* Achievements - static styling (no hover effects) */
#achievements .chip {
  cursor: default;               /* normal cursor, not pointer */
  transition: none;              /* no hover transitions */
}

/* Certifications styling - same as achievements but for links */
#certifications.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;         /* handles spacing */
  margin-top: 12px; /* keep */
}

#certifications .chip {
  display: inline-flex;          /* keeps pill as one unit */
  align-items: center;
  white-space: nowrap;           /* no breaks inside the pill */
  word-break: keep-all;          /* avoid splitting on hyphens etc. */
  overflow-wrap: normal;
  margin: 0;                     /* remove extra margin, gap covers it */
  text-decoration: none;         /* remove underline from links */
}

#certifications .chip::after{
  content: none;                 /* remove link underline animation */
}

#certifications .chip:hover{
  background: var(--accent);
  color: white;
  transform: translateY(-1px);
}

.card .thumb{ width:100%; height:180px; border-radius:12px; background:#e5e7eb; display:block; overflow:hidden; margin:10px 0 }
.card .thumb img{ width:100%; height:100%; object-fit:cover }

/* Timeline */
.timeline{ position:relative }
.timeline::before{ 
  content:""; 
  position:absolute; 
  left:10px; 
  top:0; 
  bottom:0; 
  width:3px; 
  background: var(--accent-gradient);
  border-radius: 2px;
}
.tl-item{ position:relative; padding-left:36px; margin-bottom:24px }
.tl-item::before{
  content:""; 
  position:absolute; 
  left:3px; 
  top:6px; 
  width:16px; 
  height:16px; 
  border-radius:50%; 
  background:var(--accent-gradient);
  border:3px solid var(--bg-solid);
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.2);
}

/* Skills */
.skill-grid{ display:grid; grid-template-columns:repeat(2,1fr); gap:12px }
@media (min-width:700px){ .skill-grid{ grid-template-columns:repeat(3,1fr) } }
.skill-group{ 
  border:1px solid var(--border); 
  background:var(--card); 
  border-radius:16px; 
  padding:16px;
  transition: all 200ms ease;
  backdrop-filter: blur(10px);
}
.skill-group:hover{
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  background: var(--card-hover);
}
.skill-group h4{ margin:0 0 8px 0; color: var(--accent); }
.skill-group .chips{ display:flex; flex-wrap:wrap; gap:8px }

/* Footer */
footer{ 
  padding:40px 0; 
  border-top:1px solid var(--border); 
  margin-top:60px;
  background: color-mix(in oklab, var(--bg-solid) 96%, var(--accent) 4%);
  position: relative;
}
footer::before{
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-gradient);
}
small.note{ color:var(--muted) }

/* Accessibility */
:focus-visible{ outline:3px solid color-mix(in oklab, var(--accent) 70%, white); outline-offset:3px }
img{ border-radius:12px }

/* Utilities */
.muted{ color:var(--muted) }
.mt-8{ margin-top:8px } .mt-12{ margin-top:12px } .mt-16{ margin-top:16px } .mt-24{ margin-top:24px } .mt-32{ margin-top:32px }
.center{ display:flex; align-items:center; justify-content:center }
.hidden{ display:none }