:root {
  --bg-color: #fcfbf9; /* Slightly off-white */
  --text-color: #1a1a1a;
  --accent-color: #4a4a4a;
  --font-serif: "Playfair Display", "Times New Roman", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --nav-height: 60px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-serif);
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
}

p {
  font-family: var(--font-sans);
  font-size: 1.1rem;
  color: var(--accent-color);
  font-weight: 400;
}

/* Navigation */
nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  background: rgba(252, 251, 249, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 1000;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 2rem;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

nav .logo {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--text-color);
  letter-spacing: 0.05em;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 2rem;
}

nav ul li a {
  font-family: var(--font-sans);
  text-decoration: none;
  color: var(--accent-color);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.3s ease;
}

nav ul li a:hover, nav ul li a.active {
  color: var(--text-color);
}

/* Common Layout */
main {
  padding-top: var(--nav-height);
}

section {
  padding: 6rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

/* Animations (Apple-like) */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 1.2s cubic-bezier(0.16, 1, 0.3, 1), transform 1.2s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.8rem 1.8rem;
  border: 1px solid var(--text-color);
  border-radius: 999px;
  color: var(--text-color);
  text-decoration: none;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 500;
  transition: all 0.3s ease;
  cursor: pointer;
  background: transparent;
}

.btn:hover {
  background: var(--text-color);
  color: var(--bg-color);
}

.btn-primary {
  background: var(--text-color);
  color: var(--bg-color);
}

.btn-primary:hover {
  background: transparent;
  color: var(--text-color);
}

/* Footer */
footer {
  text-align: center;
  padding: 4rem 2rem;
  border-top: 1px solid rgba(0,0,0,0.05);
  margin-top: 4rem;
}

footer p {
  font-size: 0.9rem;
  color: var(--accent-color);
}