:root {
  --bg: #07070a;
  --card: #0e1720;
  --text: #e6eef6;
  --muted: #9aa6b2;
  --accent: #1fb6ff;
  --accent-2: #0f6fb2;
  --glass: rgba(255,255,255,0.03);
  --border: rgba(255,255,255,0.02);
  --shadow: rgba(0,0,0,0.5);
  --radius: 10px;
  --maxw: 1100px;
}

body.light {
  --bg: #f8f9fa;
  --card: #ffffff;
  --text: #1a1a1a;        /* Darker main text for better contrast */
  --muted: #495057;       /* Deeper muted gray */
  --accent: #0d6efd;      /* Brighter blue for light mode */
  --accent-2: #0a58ca;    /* Deeper accent for hovers */
  --glass: rgba(0,0,0,0.03);
  --border: rgba(0,0,0,0.12);  /* Slightly bolder borders */
  --shadow: rgba(0,0,0,0.15);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  background: linear-gradient(180deg, var(--bg), #020203);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body.light { background: linear-gradient(180deg, var(--bg), #e9ecef); }

/* Subtle Animations */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes typewriter {
  from { width: 0; }
  to { width: 100%; }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.02); }
}

.animate {
  opacity: 0;
  animation: fadeInUp 0.4s ease-out forwards;
}

/* Stagger for cards */
.skill-card:nth-child(1), .project:nth-child(1), .exp-card:nth-child(1) { animation-delay: 0.1s; }
.skill-card:nth-child(2), .project:nth-child(2), .exp-card:nth-child(2) { animation-delay: 0.2s; }
.skill-card:nth-child(3), .project:nth-child(3), .exp-card:nth-child(3) { animation-delay: 0.3s; }
.skill-card:nth-child(4), .project:nth-child(4), .exp-card:nth-child(4) { animation-delay: 0.4s; }

.typewriter {
  overflow: hidden;
  border-right: 0.15em solid var(--accent);
  white-space: nowrap;
  margin: 0 auto;
  letter-spacing: 0.15em;
  animation: typewriter 2s steps(40, end), blink-caret 0.75s step-end infinite;
}

@keyframes blink-caret {
  from, to { border-color: transparent; }
  50% { border-color: var(--accent); }
}

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 1.25rem; }

/* Header */
.site-header { 
  background: transparent; position: sticky; top: 0; z-index: 30; backdrop-filter: blur(6px); border-bottom: 1px solid var(--border);
  transition: background 0.3s ease;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 0.8rem 0; }
.brand h1 { margin: 0; font-size: 1.35rem; letter-spacing: 0.6px; color: var(--text); }
.brand .sub { margin: 0; font-size: 0.82rem; color: var(--muted); }

#nav { display: flex; }
#nav ul { display: flex; gap: 1rem; margin: 0; padding: 0; list-style: none; align-items: center; position: relative; }
#nav a { 
  color: var(--muted); text-decoration: none; font-weight: 600; position: relative;
  transition: color 0.3s ease; padding-bottom: 0.5rem;
}
#nav a:hover, #nav a.active { color: var(--accent); }
#nav a.active::after {
  content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%);
  width: 6px; height: 6px; background: var(--accent); border-radius: 50%;
  animation: dotSlide 0.3s ease-out;
}

@keyframes dotSlide {
  from { opacity: 0; transform: translateX(-50%) scale(0); }
  to { opacity: 1; transform: translateX(-50%) scale(1); }
}

#nav-toggle { display: none; background: transparent; color: var(--accent); font-size: 1.25rem; border: 0; cursor: pointer; transition: color 0.3s; }
#nav-toggle:hover { color: var(--accent-2); }

#theme-toggle { background: transparent; border: 0; color: var(--accent); font-size: 1.25rem; cursor: pointer; margin-left: 1rem; transition: transform 0.3s ease; }
#theme-toggle:hover { transform: scale(1.05); }

/* Hero */
.hero { padding: 3.25rem 0; }
.hero-inner { display: grid; grid-template-columns: 1fr 340px; gap: 2rem; align-items: center; }
.intro h2 { font-size: 2rem; margin: 0 0 0.5rem; color: var(--text); }
.intro .accent { color: var(--accent); }
.lead { color: var(--muted); line-height: 1.5; }
.cta-row { margin-top: 1rem; display: flex; gap: 0.7rem; flex-wrap: wrap; }
.btn { 
  background: var(--accent); color: white; padding: 0.55rem 0.9rem; border-radius: 8px; text-decoration: none; font-weight: 700; 
  transition: all 0.3s ease-out; animation: pulse 2s infinite;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(13,110,253,0.3); }
.btn.ghost { background: transparent; color: var(--accent); border: 1px solid rgba(13,110,253,0.2); }
.btn.ghost:hover { background: rgba(13,110,253,0.1); }

/* hero-meta */
.hero-meta { background: var(--card); padding: 1rem; border-radius: var(--radius); border: 1px solid var(--border); }
.meta-list { list-style: none; padding: 0; margin: 0; color: var(--muted); }
.meta-list li { padding: 0.35rem 0; font-size: 0.95rem; color: var(--muted); }
.meta-list strong { color: var(--text); }

/* Sections */
.section, .section-dark { padding: 2.25rem 0; }
.section-dark { background: linear-gradient(180deg, var(--glass), transparent); border-top: 1px solid var(--border); }
h2 { color: var(--accent-2); margin-bottom: 0.75rem; }

/* Skills */
.skills-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 1rem; }
.skill-card { 
  background: var(--card); padding: 1rem; border-radius: var(--radius); border: 1px solid var(--border);
  transition: all 0.3s ease-out; color: var(--text);
}
.skill-card:hover { transform: translateY(-2px); box-shadow: 0 4px 12px var(--shadow); }
.skill-card h3 { margin: 0 0 0.4rem; color: var(--text); }
.skill-card p { color: var(--muted); }
.learned-list { color: var(--muted); }

/* Projects */
.project-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 1rem; }
.project { 
  background: linear-gradient(180deg, var(--glass), transparent); padding: 1rem; border-radius: var(--radius); border-left: 4px solid var(--accent); 
  box-shadow: 0 6px 18px var(--shadow); transition: all 0.3s ease-out; color: var(--text);
}
.project:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(13,110,253,0.2); }
.project h3 { margin-top: 0; color: var(--text); }
.muted { color: var(--muted); }
.proj-link { color: var(--accent); text-decoration: none; font-weight: 700; transition: all 0.3s ease; }
.proj-link:hover { text-decoration: underline; text-underline-offset: 2px; }

/* Experience */
.exp-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 1rem; }
.exp-card { 
  background: var(--card); padding: 1rem; border-radius: var(--radius); border: 1px solid var(--border);
  transition: all 0.3s ease-out; color: var(--text);
}
.exp-card:hover { transform: translateY(-2px); box-shadow: 0 4px 12px var(--shadow); }
.exp-card h4 { color: var(--text); margin: 0 0 0.25rem; }
.exp-card .muted { color: var(--muted); }
.exp-card ul { color: var(--text); padding-left: 1rem; }

/* Contact & footer */
#contact p i { margin-right: 0.5rem; color: var(--accent); transition: color 0.3s ease; }
#contact p:hover i { color: var(--accent-2); }
#contact p a { color: var(--accent); }
.site-footer { border-top: 1px solid var(--border); padding: 1.25rem 0; text-align: center; color: var(--muted); }
.signature p { font-style: italic; color: var(--muted); }

/* Responsive */
@media (max-width:900px) {
  .hero-inner { grid-template-columns: 1fr; padding-bottom: 0.5rem; }
  .project-grid, .skills-grid, .exp-grid { grid-template-columns: 1fr; }
  #nav { position: absolute; right: 1.25rem; top: 64px; background: var(--card); padding: 0.5rem 0.75rem; border-radius: var(--radius); display: none; box-shadow: 0 4px 12px var(--shadow); }
  #nav ul { flex-direction: column; gap: 0.5rem; }
  #nav-toggle { display: block; }
  .container { padding: 0 0.9rem; }
  .cta-row { flex-direction: column; }
}

a { transition: all .18s ease; }