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

:root {
  --bg: #f9f8f4;
  --ink: #1a1a1a;
  --nav-width: 220px;
  --logo-font: 'IM Fell English', serif;
  --nav-font: 'Libre Baskerville', serif;
}

html, body {
  width: 100%;
  min-height: 100vh;
  background-color: var(--bg);
  color: var(--ink);
  font-family: var(--nav-font);
  overflow-x: hidden;
}

/* ── DESKTOP LAYOUT ── */
.site-wrapper {
  min-height: 100vh;
}

/* ── FIXED SIDEBAR ── */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  width: var(--nav-width);
  padding: 2.5rem 1rem 2rem 2rem;
  display: flex;
  flex-direction: column;
  background-color: var(--bg);
  z-index: 10;
}

/* ── LOGO ── */
.logo {
  font-family: var(--logo-font);
  font-style: italic;
  font-size: 2rem;
  font-weight: 400;
  letter-spacing: 0.01em;
  line-height: 1;
  padding-bottom: 2.8rem;
  color: var(--ink);
  text-decoration: none;
  display: block;
  flex-shrink: 0;
}

/* ── HAMBURGER (hidden on desktop) ── */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 200;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--ink);
  transition: transform 0.3s ease, opacity 0.3s ease;
  transform-origin: center;
}

.hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ── MOBILE TOPBAR (hidden on desktop) ── */
.mobile-topbar {
  display: none;
}

/* ── SITE NAV ── */
.site-nav {
  flex: 1;
}

.site-nav ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.site-nav a {
  font-family: var(--nav-font);
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink);
  line-height: 1.7;
  transition: opacity 0.2s ease;
  display: inline-block;
}

.site-nav a:hover { opacity: 0.45; }
.site-nav a.active { opacity: 0.45; }

/* ── FOOTER ── */
.site-footer {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

/* ── SOCIAL ICONS ── */
.social-icons {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 0.75rem;
}

.social-icons a {
  display: flex;
  align-items: center;
  color: var(--ink);
  opacity: 0.45;
  transition: opacity 0.2s ease;
  text-decoration: none;
}

.social-icons a:hover { opacity: 1; }

.social-icons svg {
  width: 15px;
  height: 15px;
  fill: currentColor;
}

.site-footer a {
  font-family: var(--nav-font);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink);
  opacity: 0.45;
  transition: opacity 0.2s ease;
}

.site-footer a:hover { opacity: 1; }

/* ── MAIN CONTENT ── */
.main-content {
  margin-left: var(--nav-width);
  padding: 2.5rem 2.5rem 2rem 1.5rem;
}

/* ══════════════════════════════
   MOBILE  ≤ 768px
══════════════════════════════ */
@media (max-width: 768px) {
  .site-wrapper {
    display: flex;
    flex-direction: column;
    padding: 0;
  }

  .mobile-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1.25rem 1rem;
    position: relative;
    z-index: 100;
  }

  .mobile-topbar .logo {
    padding-bottom: 0;
    font-size: 1.7rem;
  }

  .hamburger {
    display: flex;
  }

  /* Sidebar: collapse to zero size but keep rendered so fixed nav inside can overlay */
  .sidebar {
    height: 0;
    width: 0;
    padding: 0;
    overflow: visible;
  }

  /* Hide sidebar logo and footer on mobile */
  .sidebar > .logo,
  .sidebar > .site-footer {
    display: none;
  }

  /* Nav inside sidebar becomes full-screen overlay (position:fixed escapes parent) */
  .site-nav {
    position: fixed;
    inset: 0;
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.35s ease;
    z-index: 150;
  }

  .site-nav.open {
    opacity: 1;
    pointer-events: all;
  }

  .site-nav ul {
    flex-direction: column;
    align-items: center;
    gap: 1.6rem;
  }

  .site-nav a {
    font-size: 1.05rem;
    letter-spacing: 0.18em;
  }

  .main-content {
    margin-left: 0;
    padding: 0;
    width: 100%;
  }

  .site-footer {
    padding: 1.5rem 1.25rem 2rem;
    flex-direction: row;
    gap: 1.5rem;
  }
}