:root {
  --ink: #1a1a2e;
  --muted: #5a6070;
  --paper: #ffffff;
  --accent: #c44536;
  --accent-hover: #a63c30;
  --line: rgba(26, 26, 46, 0.1);
  --shadow-sm: 0 2px 8px rgba(26, 26, 46, 0.06);
  --shadow-md: 0 8px 30px rgba(26, 26, 46, 0.12);
  --nav-bg: rgba(255, 255, 255, 0.95);
}

[data-theme="dark"] {
  --ink: #e8e8e8;
  --muted: #a0a0a0;
  --paper: #1a1a2e;
  --accent: #e07a6b;
  --accent-hover: #f09080;
  --line: rgba(255, 255, 255, 0.1);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.3);
  --nav-bg: rgba(26, 26, 46, 0.95);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: "Work Sans", system-ui, sans-serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.7;
}

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

/* Nav */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--nav-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 100;
  border-bottom: 1px solid var(--line);
}

.nav-inner {
  max-width: 1000px;
  margin: 0 auto;
  padding: 16px 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
}

.logo {
  font-family: "Playfair Display", serif;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--ink);
}

.nav-links { display: flex; gap: 28px; font-size: 1rem; align-items: center; }
.nav-links a { color: var(--muted); }
.nav-links a:hover, .nav-links a.active { color: var(--accent); }

/* Theme toggle */
.theme-toggle {
  background: none;
  border: 1px solid var(--line);
  border-radius: 50%;
  width: 36px;
  height: 36px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  transition: all 0.2s ease;
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
}

.theme-toggle .sun { display: none; }
.theme-toggle .moon { display: block; }

[data-theme="dark"] .theme-toggle .sun { display: block; }
[data-theme="dark"] .theme-toggle .moon { display: none; }

/* Footer */
footer {
  text-align: center;
  padding: 40px 32px;
  color: var(--muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--line);
}

/* Hamburger menu */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--ink);
  margin: 5px 0;
  transition: 0.3s;
}

@media (max-width: 800px) {
  .menu-toggle {
    display: block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--paper);
    flex-direction: column;
    padding: 20px;
    gap: 16px;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    font-size: 1rem;
  }
}