/* Shared layer only: reset, tokens, sidebar nav, base page layout.
   Page-specific styling (cards, grids, poem layout, etc.) stays in each page's own <style> block. */

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

:root {
  --white: #ffffff;
  --off-white: #f7f6f3;
  --ink: #1a1a1a;
  --muted: #888;
  --border: #e4e2dc;
  --accent: #2a2a2a;
  --nav-w: 220px;
  --hover-bg: #f0ede6;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--white);
  color: var(--ink);
  display: flex;
  min-height: 100vh;
}

/* ── SIDEBAR ─────────────────────────────── */
nav {
  position: fixed;
  top: 0; left: 0;
  width: var(--nav-w);
  height: 100vh;
  background: var(--off-white);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 2.5rem 1.5rem;
  gap: 0.4rem;
  z-index: 100;
  overflow-y: auto;
}

.nav-logo {
  font-family: 'DM Serif Display', serif;
  font-size: 1.4rem;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
  line-height: 1.2;
  text-decoration: none;
  display: block;
}

.nav-logo span {
  display: block;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.72rem;
  font-weight: 300;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 0.3rem;
}

.nav-btn {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.55rem 0.8rem;
  border-radius: 8px;
  text-decoration: none;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 400;
  letter-spacing: 0.01em;
  transition: background 0.18s ease, color 0.18s ease;
  cursor: pointer;
  border: none;
  background: transparent;
  width: 100%;
  text-align: left;
}

.nav-btn .icon { font-size: 1rem; flex-shrink: 0; }

.nav-btn:hover,
.nav-btn.active {
  background: var(--hover-bg);
  color: var(--ink);
}

.nav-sub-btn {
  font-size: 0.77rem;
  padding-left: 1.8rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.nav-divider {
  height: 1px;
  background: var(--border);
  margin: 0.8rem 0;
}

.nav-section-label {
  font-size: 0.63rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #ccc;
  padding: 0.3rem 0.8rem;
  margin-top: 0.4rem;
}

.nav-footer {
  margin-top: auto;
  font-size: 0.7rem;
  color: var(--muted);
  letter-spacing: 0.04em;
  padding-top: 1rem;
}

.nav-footer a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.nav-footer a:hover { color: var(--ink); }

/* ── BASE LAYOUT ──────────────────────────── */
main {
  margin-left: var(--nav-w);
  flex: 1;
  padding: 4rem 5rem;
}

.section-label {
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1.4rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  color: var(--muted);
  text-decoration: none;
  margin-bottom: 1.5rem;
  transition: color 0.15s;
}

.back-link:hover { color: var(--ink); }

/* ── SUB-PAGE HEADER ─────────────────────── (used by any page that isn't the hub itself) */
.page-header {
  margin-bottom: 3.5rem;
  animation: fadeUp 0.4s ease both;
}

.page-header h1 {
  font-family: 'DM Serif Display', serif;
  font-size: 2.8rem;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 0.6rem;
}

.page-header p {
  font-size: 0.9rem;
  color: var(--muted);
  font-weight: 300;
  line-height: 1.7;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

@media (max-width: 768px) {
  nav { display: none; }
  main { margin-left: 0; padding: 2rem 1.5rem; }
  .page-header h1 { font-size: 2rem; }
}