:root {
  /* 60-30-10 Rule Palette */
  --bg-body: #fdfcfb;       /* Warm paper white */
  --surface: #ffffff;       /* Pure white */
  --primary: #2d4f3e;       /* Deep Forest Green - Trust/Academic */
  --primary-light: #e8ede9; /* Soft green wash */
  --accent: #c07b66;        /* Muted Terra Cotta - Complementary/Action */
  --accent-hover: #a86552;
  --text-main: #1a201d;     /* Soft Black */
  --text-muted: #5e6662;    /* Grey */
  --border: #e6eae8;
  
  --shadow-sm: 0 4px 6px -1px rgba(45, 79, 62, 0.05);
  --shadow-card: 0 10px 30px -5px rgba(45, 79, 62, 0.06);
  
  --radius: 8px; /* Sharper radius for a more professional look */
  --font-heading: 'Lora', Georgia, serif;
  --font-body: 'Proxima Nova', 'Inter', sans-serif;
  --max-width: 1080px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--bg-body);
  color: var(--text-main);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--accent); }

h1, h2, h3, h4 { 
  font-family: var(--font-heading); 
  color: var(--primary);
  margin: 0 0 0.5em; 
  font-weight: 600;
  line-height: 1.25;
}

h1 { font-size: clamp(2.2rem, 5vw, 3rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.8rem, 4vw, 2.2rem); }
h3 { font-size: 1.4rem; color: var(--text-main); }

p { margin-bottom: 1.5rem; color: var(--text-muted); }
p.lede { font-size: 1.25rem; line-height: 1.6; color: var(--text-main); font-weight: 400; max-width: 65ch; }

/* Layout */
.shell { width: min(var(--max-width), 92%); margin: 0 auto; }
.section { padding: clamp(4rem, 8vw, 6rem) 0; }
.section.muted { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

/* Header & Nav */
.site-header {
  padding: 1.5rem 0;
  background: rgba(253, 252, 251, 0.95);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s;
}
.site-header.scrolled { border-bottom-color: var(--border); }

.nav-container { display: flex; justify-content: space-between; align-items: center; }
.brand img { height: 44px; display: block; }

.nav-links { list-style: none; display: flex; gap: 2rem; margin: 0; padding: 0; }
.nav-links a { 
  color: var(--text-muted); 
  font-weight: 500; 
  font-size: 0.95rem; 
  position: relative;
}
.nav-links a.active, .nav-links a:hover { color: var(--primary); }
.nav-links a.active::after {
  content: ''; position: absolute; bottom: -4px; left: 0; width: 100%; height: 1px; background: var(--accent);
}

/* Buttons */
.btn {
  display: inline-flex; justify-content: center; align-items: center;
  padding: 0.8em 1.6em;
  background: var(--primary);
  color: white;
  font-weight: 600;
  border-radius: var(--radius);
  transition: all 0.2s ease;
  font-size: 1rem;
  border: 1px solid var(--primary);
}
.btn:hover { background: var(--accent); border-color: var(--accent); color: white; transform: translateY(-1px); }

.btn.secondary {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--border);
}
.btn.secondary:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }

/* Cards & Grids */
.grid { display: grid; gap: 2rem; }
.grid.three { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid.two { grid-template-columns: repeat(auto-fit, minmax(400px, 1fr)); }

.card {
  background: var(--surface);
  padding: 2rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-card); border-color: rgba(45, 79, 62, 0.2); }

/* Pills & Tags */
.pill-row { display: flex; flex-wrap: wrap; gap: 0.8rem; margin: 1rem 0; }
.pill {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
  color: var(--accent);
  background: rgba(192, 123, 102, 0.1);
  padding: 0.4em 0.8em;
  border-radius: 4px;
}

/* Lists */
.list-clean { list-style: none; padding: 0; margin: 0; }
.list-clean li { 
  margin-bottom: 0.75rem; 
  padding-left: 1.5rem; 
  position: relative; 
  color: var(--text-muted);
}
.list-clean li::before {
  content: '→';
  color: var(--accent);
  position: absolute; left: 0; top: 0;
  font-weight: bold;
}

/* Publication List */
.pub-item {
  border-left: 3px solid var(--border);
  padding-left: 1.5rem;
  margin-bottom: 1.5rem;
  transition: border-color 0.2s;
}
.pub-item:hover { border-left-color: var(--accent); }

/* Forms */
input, textarea {
  width: 100%;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-body);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 0.2s;
}
input:focus, textarea:focus { outline: none; border-color: var(--primary); background: #fff; }
label { display: block; margin-bottom: 0.5rem; font-weight: 600; font-size: 0.9rem; color: var(--primary); }

/* CV Iframe Specifics */
.cv-container {
    width: 100%;
    height: calc(100vh - 140px);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    background: #fff;
    box-shadow: var(--shadow-card);
}
.cv-container iframe {
    width: 100%;
    height: 100%;
    border: none;
}

/* Footer */
footer { background: var(--primary); color: rgba(255,255,255,0.8); padding: 3rem 0; font-size: 0.95rem; }
footer a { color: #fff; text-decoration: underline; text-decoration-color: rgba(255,255,255,0.3); }
footer a:hover { text-decoration-color: #fff; color: #fff; }

@media (max-width: 768px) {
  .nav-links { display: none; } /* Simplified for brevity; usually requires JS toggle */
  .hero-grid { grid-template-columns: 1fr; }
  .grid.two { grid-template-columns: 1fr; }
  
  /* Mobile Nav Fallback (Simple) */
  .nav-links { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: center; margin-top: 1rem; }
  .nav-container { flex-direction: column; }
}