:root {
  /* Accent (unchanged in both themes) */
  --accent: #e53935;
  --accent-soft: rgba(229, 57, 53, 0.15);
  --accent-tint: rgba(229, 57, 53, 0.1);

  /* Dark theme (default) */
  --bg-gradient-start: #1e293b;
  --bg-gradient-end: #020617;
  --bg-top-nav: rgba(3, 7, 18, 0.94);
  --bg-card: #020617;
  --bg-mini-card: #020617;
  --bg-highlight-box: rgba(15, 23, 42, 0.8);
  --bg-code: rgba(15, 23, 42, 0.9);
  --bg-nav-hover: rgba(15, 23, 42, 0.9);
  --bg-sidebar: rgba(15, 23, 42, 0.95);
  --bg-sidebar-item-hover: rgba(15, 23, 42, 0.9);
  --bg-footer: rgba(2, 6, 23, 0.65);

  --text-main: #f9fafb;
  --text-muted: #9ca3af;
  --text-soft: #64748b;
  --text-code: #e5e7eb;

  --border-subtle: rgba(148, 163, 184, 0.4);
  --border-soft: rgba(148, 163, 184, 0.25);
  --border-softer: rgba(148, 163, 184, 0.3);
  --border-divider: rgba(148, 163, 184, 0.18);
  --border-medium: rgba(148, 163, 184, 0.5);
  --border-strong: rgba(148, 163, 184, 0.6);
  --border-card: rgba(51, 65, 85, 0.9);
  --border-footer-top: rgba(30, 41, 59, 0.9);

  --shadow-section: 0 24px 60px rgba(15, 23, 42, 0.7);
  --shadow-sidebar: 0 18px 40px rgba(15, 23, 42, 0.8);
}

body[data-theme='light'] {
  --bg-gradient-start: #f1f5f9;
  --bg-gradient-end: #e2e8f0;
  --bg-top-nav: rgba(255, 255, 255, 0.95);
  --bg-card: #ffffff;
  --bg-mini-card: #f8fafc;
  --bg-highlight-box: rgba(241, 245, 249, 0.85);
  --bg-code: rgba(15, 23, 42, 0.08);
  --bg-nav-hover: rgba(15, 23, 42, 0.06);
  --bg-sidebar: rgba(255, 255, 255, 0.95);
  --bg-sidebar-item-hover: rgba(15, 23, 42, 0.05);
  --bg-footer: rgba(248, 250, 252, 0.7);

  --text-main: #0f172a;
  --text-muted: #475569;
  --text-soft: #64748b;
  --text-code: #0f172a;

  --border-subtle: rgba(15, 23, 42, 0.15);
  --border-soft: rgba(15, 23, 42, 0.1);
  --border-softer: rgba(15, 23, 42, 0.12);
  --border-divider: rgba(15, 23, 42, 0.1);
  --border-medium: rgba(15, 23, 42, 0.2);
  --border-strong: rgba(15, 23, 42, 0.3);
  --border-card: rgba(15, 23, 42, 0.12);
  --border-footer-top: rgba(15, 23, 42, 0.1);

  --shadow-section: 0 4px 16px rgba(15, 23, 42, 0.08);
  --shadow-sidebar: 0 4px 16px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: "Poppins", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top left, var(--bg-gradient-start), var(--bg-gradient-end));
  color: var(--text-main);
  scroll-behavior: smooth;
}

a {
  color: inherit;
  text-decoration: none;
}

.shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Top navigation */
.top-nav {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 32px;
  background: var(--bg-top-nav);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-softer);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-logo {
  height: 26px;
  width: auto;
}

body[data-theme='light'] .brand-logo {
  content: url('../images/odom-light.svg');
}

.brand-text {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  gap: 10px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  flex-wrap: wrap;
  justify-content: flex-end;
  align-items: center;
}

.nav-link {
  padding: 6px 10px;
  border-radius: 999px;
  color: var(--text-muted);
  border: 1px solid transparent;
  cursor: pointer;
}

.nav-link:hover {
  color: var(--text-main);
  background: var(--bg-nav-hover);
}

.nav-link.active {
  color: var(--text-main);
  border-color: var(--accent);
  background: var(--accent-soft);
}

/* Theme toggle */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--border-soft);
  background: transparent;
  color: var(--text-main);
  border-radius: 999px;
  cursor: pointer;
  margin-left: 6px;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

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

.theme-icon {
  display: block;
}

.theme-icon-moon {
  display: none;
}

body[data-theme='light'] .theme-icon-sun {
  display: none;
}

body[data-theme='light'] .theme-icon-moon {
  display: block;
}

/* Page layout */
.page {
  flex: 1;
  display: flex;
  justify-content: center;
  padding: 32px 16px 40px;
}

.page-inner {
  max-width: 1120px;
  width: 100%;
  display: grid;
  grid-template-columns: minmax(0, 3.2fr) minmax(220px, 1.2fr);
  gap: 24px;
}

@media (max-width: 960px) {
  .page-inner {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* Content area */
.content {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

section.playbook-section {
  background: var(--bg-card);
  border-radius: 18px;
  border: 1px solid var(--border-card);
  padding: 20px 22px 18px;
  box-shadow: var(--shadow-section);
  scroll-margin-top: 80px;
}

section.playbook-section.active {
  border-color: var(--accent);
}

.section-eyebrow {
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 6px;
}

.section-title {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 6px;
}

.section-subtitle {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 16px;
  line-height: 1.6;
}

h3 {
  font-size: 16px;
  margin: 16px 0 6px;
}

.playbook-section h3 + * {
  margin-top: 4px;
}

.playbook-section h3 ~ h3 {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--border-divider);
}

h4 {
  font-size: 14px;
  margin: 12px 0 6px;
  text-transform: none;
}

p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-main);
  margin: 4px 0 10px;
}

ul,
ol {
  padding-left: 20px;
  margin: 4px 0 10px;
}

li {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-main);
  margin-bottom: 4px;
}

code {
  font-family: "SFMono-Regular", Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 13px;
  background: var(--bg-code);
  padding: 1px 4px;
  border-radius: 4px;
  color: var(--text-code);
}

blockquote {
  border-left: 3px solid var(--accent);
  margin: 8px 0 14px;
  padding-left: 12px;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.7;
}

.inline-label {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  display: block;
  margin-top: 14px;
  margin-bottom: 6px;
}

.inline-note {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

.highlight-box {
  border-radius: 12px;
  border: 1px solid var(--border-medium);
  background: var(--bg-highlight-box);
  padding: 10px 12px;
  margin: 8px 0 10px;
  font-size: 13px;
  color: var(--text-main);
}

.two-col-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 6px;
}

@media (max-width: 720px) {
  .two-col-grid {
    grid-template-columns: 1fr;
  }
}

.mini-card {
  border-radius: 10px;
  border: 1px solid var(--border-card);
  background: var(--bg-mini-card);
  padding: 8px 10px;
  font-size: 13px;
}

.mini-title {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.11em;
  color: var(--text-muted);
  margin-bottom: 4px;
}

/* Sidebar / quick nav */
.sidebar {
  position: sticky;
  top: 88px;
  align-self: flex-start;
  background: var(--bg-sidebar);
  border-radius: 16px;
  border: 1px solid var(--border-card);
  padding: 14px 14px 12px;
  box-shadow: var(--shadow-sidebar);
}

.sidebar-title {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.sidebar-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.sidebar-item a {
  display: block;
  font-size: 13px;
  color: var(--text-main);
  padding: 4px 8px;
  border-radius: 999px;
  border: 1px solid transparent;
}

.sidebar-item a:hover {
  border-color: var(--border-strong);
  background: var(--bg-sidebar-item-hover);
}

.sidebar-item.active a {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.sidebar-item a span {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-soft);
  margin-right: 6px;
}

.sidebar-footer {
  margin-top: 10px;
  font-size: 11px;
  color: var(--text-soft);
  border-top: 1px solid var(--border-footer-top);
  padding-top: 8px;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border-soft);
  padding: 24px clamp(24px, 4vw, 48px);
  background: var(--bg-footer);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.site-footer p {
  margin: 0;
}

.footer-links {
  display: flex;
  gap: 16px;
  margin: 0;
}

.footer-links a {
  color: var(--text-main);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.footer-links a:hover {
  border-color: var(--accent);
}