/* =========================================
   The Tao Path — Main Stylesheet
   =========================================
   1. Custom Properties (Design Tokens)
   2. Reset & Base
   3. Typography
   4. Layout
   5. Skip Link (Accessibility)
   6. Navigation
   7. Breadcrumbs
   8. Hero
   9. Article Layout
   10. Sidebar
   11. Callout Boxes
   12. Cards
   13. Blockquotes & Pull Quotes
   14. Homepage Sections
   15. Books Page
   16. Blog
   17. Glossary
   18. Quotes Page
   19. Footer
   20. Utilities
   21. Responsive
   ========================================= */

/* -----------------------------------------
   1. Custom Properties
   ----------------------------------------- */
:root {
  /* Colors */
  --color-primary:       #2d5a3d;
  --color-primary-dark:  #1e3d29;
  --color-primary-light: #4a7a5a;
  --color-primary-faint: #e8f0eb;
  --color-accent:        #b5833a;
  --color-accent-light:  #d4a055;
  --color-accent-faint:  #f6ede0;
  --color-bg:            #faf7f2;
  --color-bg-alt:        #efeae1;
  --color-bg-dark:       #1e3d29;
  --color-surface:       #ffffff;
  --color-text:          #1c1e1d;
  --color-text-muted:    #5a6158;
  --color-border:        #d4cec4;
  --color-border-dark:   #b5b0a8;
  --color-link:          #2d5a3d;
  --color-link-hover:    #1e3d29;

  /* Typography */
  --font-serif: 'Noto Serif', Georgia, 'Times New Roman', serif;
  --font-sans:  'Inter', system-ui, -apple-system, sans-serif;

  /* Scale */
  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1.0625rem;  /* 17px */
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;
  --text-6xl:  3.75rem;
  --line-height-tight:  1.25;
  --line-height-snug:   1.4;
  --line-height-base:   1.7;
  --line-height-loose:  1.8;

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Layout */
  --container-max:    1200px;
  --container-narrow: 820px;
  --nav-height:       72px;

  /* Borders */
  --radius:    6px;
  --radius-lg: 12px;
  --radius-xl: 20px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-sm: 0 2px 6px rgba(0,0,0,0.07);
  --shadow:    0 4px 14px rgba(0,0,0,0.09);
  --shadow-lg: 0 8px 28px rgba(0,0,0,0.12);

  /* Transitions */
  --ease: 200ms ease;
  --ease-slow: 350ms ease;
}

/* -----------------------------------------
   2. Reset & Base
   ----------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 100%;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

img, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: var(--color-link);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color var(--ease), text-decoration-color var(--ease);
}

a:hover {
  color: var(--color-link-hover);
  text-decoration-thickness: 2px;
}

a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 2px;
}

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font: inherit;
}

/* -----------------------------------------
   3. Typography
   ----------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: var(--line-height-tight);
  color: var(--color-text);
}

h1 { font-size: clamp(var(--text-3xl), 4vw, var(--text-5xl)); }
h2 { font-size: clamp(var(--text-2xl), 3vw, var(--text-4xl)); }
h3 { font-size: clamp(var(--text-xl), 2.5vw, var(--text-3xl)); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

.article-body p {
  margin-bottom: var(--space-5);
}

.article-body h2 {
  margin-top: var(--space-12);
  margin-bottom: var(--space-4);
}

.article-body h3 {
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
}

.article-body ul,
.article-body ol {
  list-style: disc;
  padding-left: var(--space-6);
  margin-bottom: var(--space-5);
}

.article-body ol {
  list-style: decimal;
}

.article-body li {
  margin-bottom: var(--space-2);
}

.article-body strong {
  font-weight: 600;
}

.article-body em {
  font-style: italic;
}

/* -----------------------------------------
   4. Layout
   ----------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-5);
}

.container--narrow {
  max-width: var(--container-narrow);
}

/* Page wrapper */
.page-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

/* Section spacing */
.section {
  padding-block: var(--space-16);
}

.section--lg {
  padding-block: var(--space-24);
}

.section--sm {
  padding-block: var(--space-10);
}

.section--dark {
  background: var(--color-bg-dark);
  color: #fff;
}

.section--dark h1,
.section--dark h2,
.section--dark h3 {
  color: #fff;
}

.section--alt {
  background: var(--color-bg-alt);
}

.section--surface {
  background: var(--color-surface);
}

/* -----------------------------------------
   5. Skip Link (Accessibility)
   ----------------------------------------- */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-4);
  z-index: 9999;
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-3) var(--space-6);
  border-radius: 0 0 var(--radius) var(--radius);
  font-weight: 600;
  text-decoration: none;
  font-size: var(--text-sm);
  transition: top var(--ease);
}

.skip-link:focus {
  top: 0;
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* -----------------------------------------
   6. Navigation
   ----------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-xs);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  height: var(--nav-height);
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-5);
}

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
  flex-shrink: 0;
}

.nav-logo:hover {
  color: var(--color-primary);
}

.nav-logo-text {
  display: flex;
  flex-direction: column;
  gap: 0;
  line-height: 1.2;
}

.nav-logo-name {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--color-primary);
}

.nav-logo-tag {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

/* Desktop nav */
.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin-left: auto;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-item {
  position: relative;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
  transition: background var(--ease), color var(--ease);
  white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
  background: var(--color-primary-faint);
  color: var(--color-primary);
}

.nav-link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.nav-trigger {
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  transition: background var(--ease), color var(--ease);
  white-space: nowrap;
}

.nav-trigger:hover,
.nav-trigger[aria-expanded="true"] {
  background: var(--color-primary-faint);
  color: var(--color-primary);
}

.nav-trigger:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.nav-trigger svg {
  width: 14px;
  height: 14px;
  transition: transform var(--ease);
}

.nav-trigger[aria-expanded="true"] svg {
  transform: rotate(180deg);
}

/* Dropdown */
.nav-dropdown {
  position: absolute;
  top: calc(100% + var(--space-2));
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2);
  min-width: 200px;
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(-8px);
  transition: opacity var(--ease), visibility var(--ease), transform var(--ease);
  z-index: 200;
}

.nav-item:hover .nav-dropdown,
.nav-item:focus-within .nav-dropdown,
.nav-dropdown.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.nav-dropdown a {
  display: block;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius);
  font-size: var(--text-sm);
  color: var(--color-text);
  text-decoration: none;
  transition: background var(--ease), color var(--ease);
  white-space: nowrap;
}

.nav-dropdown a:hover {
  background: var(--color-primary-faint);
  color: var(--color-primary);
}

.nav-dropdown a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* CTA in nav */
.nav-cta {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-5);
  background: var(--color-primary);
  color: #fff !important;
  border-radius: var(--radius);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  transition: background var(--ease);
  margin-left: var(--space-2);
}

.nav-cta:hover {
  background: var(--color-primary-dark);
  color: #fff !important;
}

/* Hamburger button */
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  margin-left: auto;
  color: var(--color-text);
  transition: background var(--ease);
}

.nav-toggle:hover {
  background: var(--color-bg-alt);
}

.nav-toggle:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Mobile nav overlay */
.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 90;
  background: rgba(0,0,0,0.4);
  opacity: 0;
  transition: opacity var(--ease-slow);
}

.nav-overlay.is-visible {
  opacity: 1;
}

/* Mobile nav drawer */
.nav-drawer {
  position: fixed;
  top: 0;
  right: -100%;
  bottom: 0;
  width: min(360px, 90vw);
  z-index: 95;
  background: var(--color-surface);
  overflow-y: auto;
  padding: var(--space-6);
  transition: right var(--ease-slow);
  box-shadow: var(--shadow-lg);
}

.nav-drawer.is-open {
  right: 0;
}

.nav-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-8);
}

.nav-drawer-close {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  color: var(--color-text);
  transition: background var(--ease);
}

.nav-drawer-close:hover {
  background: var(--color-bg-alt);
}

.nav-drawer-close:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.nav-drawer-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.nav-drawer-item a {
  display: flex;
  align-items: center;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
  transition: background var(--ease), color var(--ease);
}

.nav-drawer-item a:hover {
  background: var(--color-primary-faint);
  color: var(--color-primary);
}

.nav-drawer-section-title {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  padding: var(--space-4) var(--space-4) var(--space-2);
  margin-top: var(--space-4);
}

.nav-drawer-sub {
  padding-left: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-top: var(--space-1);
  margin-bottom: var(--space-2);
}

.nav-drawer-sub a {
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--color-text-muted);
  padding: var(--space-2) var(--space-3);
}

.nav-drawer-sub a:hover {
  color: var(--color-primary);
  background: var(--color-primary-faint);
}

/* -----------------------------------------
   7. Breadcrumbs
   ----------------------------------------- */
.breadcrumb {
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
  padding-block: var(--space-3);
}

.breadcrumb ol {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  list-style: none;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.breadcrumb li:not(:last-child)::after {
  content: '/';
  margin-left: var(--space-2);
  color: var(--color-border-dark);
}

.breadcrumb a {
  color: var(--color-text-muted);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.breadcrumb [aria-current="page"] {
  color: var(--color-text);
  font-weight: 500;
}

/* -----------------------------------------
   8. Hero
   ----------------------------------------- */
.hero {
  background: var(--color-bg-dark);
  color: #fff;
  padding-block: var(--space-24);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 70% 50%, rgba(180,131,58,0.12) 0%, transparent 60%);
  pointer-events: none;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-16);
  align-items: center;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-5);
  position: relative;
}

.hero-label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-accent-light);
  margin-bottom: var(--space-4);
}

.hero h1 {
  color: #fff;
  font-size: clamp(var(--text-4xl), 6vw, var(--text-6xl));
  margin-bottom: var(--space-5);
  line-height: 1.1;
}

.hero-tagline {
  font-size: var(--text-xl);
  color: rgba(255,255,255,0.8);
  margin-bottom: var(--space-8);
  max-width: 540px;
  line-height: var(--line-height-snug);
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.hero-yinyang {
  width: 200px;
  height: 200px;
  opacity: 0.15;
  animation: rotate 60s linear infinite;
  flex-shrink: 0;
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius);
  font-weight: 600;
  font-size: var(--text-base);
  text-decoration: none;
  transition: background var(--ease), color var(--ease), box-shadow var(--ease);
  min-height: 44px;
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-accent-light);
  color: #fff;
  box-shadow: var(--shadow);
}

.btn-secondary {
  background: rgba(255,255,255,0.12);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.3);
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.2);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: #fff;
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  min-height: 36px;
}

/* -----------------------------------------
   9. Article Layout
   ----------------------------------------- */
.article-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: var(--space-12);
  align-items: start;
  padding-block: var(--space-12);
}

.article-header {
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-8);
  border-bottom: 2px solid var(--color-border);
}

.article-header h1 {
  margin-bottom: var(--space-5);
}

.article-lead {
  font-size: var(--text-xl);
  color: var(--color-text-muted);
  line-height: var(--line-height-snug);
  font-family: var(--font-serif);
  font-style: italic;
}

.article-meta {
  display: flex;
  gap: var(--space-6);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-5);
}

.article-body {
  min-width: 0; /* prevent grid blowout */
}

/* See Also at the bottom */
.see-also {
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
}

.see-also h2 {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-6);
}

.see-also-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-4);
}

.see-also-card {
  display: block;
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--color-text);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: border-color var(--ease), box-shadow var(--ease), color var(--ease);
}

.see-also-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
  color: var(--color-primary);
}

/* -----------------------------------------
   10. Sidebar
   ----------------------------------------- */
.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  position: sticky;
  top: calc(var(--nav-height) + var(--space-6));
  align-self: start;
}

.sidebar-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}

.sidebar-card h2 {
  font-size: var(--text-base);
  font-family: var(--font-serif);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
}

/* Table of Contents */
.toc-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.toc-list a {
  display: block;
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  border-radius: var(--radius);
  transition: background var(--ease), color var(--ease);
  border-left: 2px solid transparent;
}

.toc-list a:hover,
.toc-list a.active {
  color: var(--color-primary);
  border-left-color: var(--color-primary);
  background: var(--color-primary-faint);
  padding-left: var(--space-3);
}

/* Book recommendation card */
.book-rec {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-border);
}

.book-rec:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.book-rec:first-child {
  padding-top: 0;
}

.book-cover {
  width: 56px;
  height: 76px;
  object-fit: cover;
  border-radius: 3px;
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
  background: var(--color-bg-alt);
}

.book-info {
  flex: 1;
  min-width: 0;
}

.book-title {
  font-family: var(--font-serif);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-text);
  line-height: var(--line-height-snug);
  margin-bottom: var(--space-1);
}

.book-author {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.book-link {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
}

.book-link:hover {
  text-decoration: underline;
  color: var(--color-accent-light);
}

.affiliate-note {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-4);
  font-style: italic;
}

/* -----------------------------------------
   11. Callout Boxes
   ----------------------------------------- */

/* Practice box */
.practice-box {
  background: var(--color-primary-faint);
  border: 1px solid rgba(45,90,61,0.2);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-6) var(--space-8);
  margin-block: var(--space-8);
}

.practice-box h2,
.practice-box h3 {
  font-size: var(--text-xl);
  color: var(--color-primary-dark);
  margin-bottom: var(--space-4);
  margin-top: 0;
}

.practice-box ol {
  list-style: decimal;
  padding-left: var(--space-5);
}

.practice-box li {
  margin-bottom: var(--space-3);
  line-height: var(--line-height-base);
}

/* Quote highlight */
.callout-quote {
  background: var(--color-accent-faint);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: var(--space-5) var(--space-6);
  margin-block: var(--space-6);
  font-family: var(--font-serif);
  font-style: italic;
  font-size: var(--text-lg);
  color: var(--color-text);
  line-height: var(--line-height-loose);
}

.callout-quote cite {
  display: block;
  font-style: normal;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-3);
}

/* Key concept box */
.concept-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-block: var(--space-6);
}

.concept-box h3 {
  color: var(--color-primary);
  font-size: var(--text-lg);
  margin-top: 0;
  margin-bottom: var(--space-3);
}

/* -----------------------------------------
   12. Cards
   ----------------------------------------- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-6);
}

.cards-grid--3 {
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--ease), border-color var(--ease), transform var(--ease);
}

.card:hover {
  box-shadow: var(--shadow);
  border-color: var(--color-primary-light);
  transform: translateY(-2px);
}

.card-icon {
  width: 48px;
  height: 48px;
  background: var(--color-primary-faint);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
  color: var(--color-primary);
}

.card-title {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-3);
  color: var(--color-text);
}

.card-body {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--line-height-base);
  flex: 1;
  margin-bottom: var(--space-4);
}

.card-link {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  margin-top: auto;
}

.card-link:hover {
  text-decoration: underline;
  color: var(--color-primary-dark);
}

/* Path cards (Philosophy, Apply It, Texts) */
.path-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  text-decoration: none;
  color: var(--color-text);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: box-shadow var(--ease), border-color var(--ease), transform var(--ease);
  position: relative;
  overflow: hidden;
}

.path-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--color-primary);
}

.path-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-light);
  transform: translateY(-3px);
}

.path-card-icon {
  font-size: 2rem;
}

.path-card-title {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-primary);
}

.path-card-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--line-height-base);
}

.path-card-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: auto;
}

.path-card-links a {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-1) var(--space-2);
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  transition: background var(--ease), color var(--ease);
}

.path-card-links a:hover {
  background: var(--color-primary-faint);
  color: var(--color-primary);
}

/* -----------------------------------------
   13. Blockquotes & Pull Quotes
   ----------------------------------------- */
blockquote {
  border-left: 3px solid var(--color-accent);
  padding-left: var(--space-6);
  margin-block: var(--space-6);
  font-style: italic;
  color: var(--color-text-muted);
}

blockquote p {
  margin-bottom: var(--space-2) !important;
}

blockquote cite {
  font-style: normal;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* Large decorative quote (for homepage, quote page) */
.quote-hero {
  text-align: center;
  padding-block: var(--space-16);
}

.quote-hero blockquote {
  border: none;
  padding: 0;
  max-width: 720px;
  margin-inline: auto;
  font-family: var(--font-serif);
  font-size: clamp(var(--text-2xl), 3vw, var(--text-4xl));
  font-style: italic;
  color: rgba(255,255,255,0.95);
  line-height: var(--line-height-snug);
}

.quote-hero cite {
  display: block;
  margin-top: var(--space-5);
  font-style: normal;
  font-size: var(--text-base);
  color: rgba(255,255,255,0.6);
}

/* Quote cards */
.quote-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.quote-card-text {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: var(--text-lg);
  color: var(--color-text);
  line-height: var(--line-height-loose);
  margin-bottom: var(--space-4);
}

.quote-card-text::before { content: '\201C'; }
.quote-card-text::after  { content: '\201D'; }

.quote-card-source {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* -----------------------------------------
   14. Homepage Sections
   ----------------------------------------- */

/* Section headings */
.section-header {
  text-align: center;
  margin-bottom: var(--space-10);
}

.section-header .section-label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}

.section-header h2 {
  margin-bottom: var(--space-4);
}

.section-header p {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 600px;
  margin-inline: auto;
}

/* Start here section */
.start-here {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}

.start-here-text h2 {
  margin-bottom: var(--space-4);
}

.start-here-text p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
}

.start-here-steps {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.start-step {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
}

.start-step-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--text-sm);
  flex-shrink: 0;
}

.start-step-content strong {
  display: block;
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.start-step-content a {
  text-decoration: none;
  font-weight: 600;
}

.start-step-content p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin: 0;
}

/* -----------------------------------------
   15. Books Page
   ----------------------------------------- */
.books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-6);
}

.book-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--ease), transform var(--ease);
}

.book-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.book-card-cover {
  width: 100%;
  aspect-ratio: 3/4;
  max-height: 240px;
  object-fit: cover;
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-4xl);
}

.book-card-body {
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  flex: 1;
}

.book-card-level {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-accent);
  margin-bottom: var(--space-2);
}

.book-card-title {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-1);
  color: var(--color-text);
  line-height: var(--line-height-snug);
}

.book-card-author {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.book-card-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--line-height-base);
  margin-bottom: var(--space-4);
  flex: 1;
}

.book-card-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.book-card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  transition: background var(--ease);
}

.book-card-link:hover {
  background: var(--color-primary-dark);
  color: #fff;
}

/* -----------------------------------------
   16. Blog
   ----------------------------------------- */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-6);
}

.blog-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--ease), transform var(--ease);
}

.blog-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.blog-card-body {
  padding: var(--space-6);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.blog-card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.blog-card-tag {
  background: var(--color-primary-faint);
  color: var(--color-primary);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.blog-card-title {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-3);
  line-height: var(--line-height-snug);
}

.blog-card-title a {
  color: var(--color-text);
  text-decoration: none;
}

.blog-card-title a:hover {
  color: var(--color-primary);
}

.blog-card-excerpt {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--line-height-base);
  flex: 1;
  margin-bottom: var(--space-4);
}

.blog-card-link {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  margin-top: auto;
}

.blog-card-link:hover {
  text-decoration: underline;
}

/* -----------------------------------------
   17. Glossary
   ----------------------------------------- */
.glossary-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
}

.glossary-nav a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--color-text);
  text-decoration: none;
  transition: background var(--ease), color var(--ease);
}

.glossary-nav a:hover,
.glossary-nav a:focus {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.glossary-section {
  margin-bottom: var(--space-10);
}

.glossary-letter {
  font-family: var(--font-serif);
  font-size: var(--text-4xl);
  color: var(--color-primary);
  border-bottom: 2px solid var(--color-border);
  padding-bottom: var(--space-3);
  margin-bottom: var(--space-6);
}

.glossary-item {
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

.glossary-item:last-child {
  border-bottom: none;
}

.glossary-term {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.glossary-pinyin {
  font-size: var(--text-sm);
  color: var(--color-accent);
  margin-bottom: var(--space-3);
  font-style: italic;
}

.glossary-def {
  color: var(--color-text);
  line-height: var(--line-height-base);
}

/* -----------------------------------------
   18. Quotes Page
   ----------------------------------------- */
.quotes-filter {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-bottom: var(--space-8);
}

.filter-btn {
  padding: var(--space-2) var(--space-4);
  border-radius: 999px;
  border: 1px solid var(--color-border);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  background: var(--color-surface);
  transition: background var(--ease), color var(--ease), border-color var(--ease);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.quotes-masonry {
  columns: 2;
  column-gap: var(--space-6);
}

.quotes-masonry .quote-card {
  break-inside: avoid;
  margin-bottom: var(--space-6);
}

/* -----------------------------------------
   19. Footer
   ----------------------------------------- */
.site-footer {
  background: #111816;
  color: rgba(255,255,255,0.75);
  padding-block: var(--space-16) var(--space-8);
}

.footer-inner {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-5);
}

.footer-grid {
  display: grid;
  grid-template-columns: 280px repeat(4, 1fr);
  gap: var(--space-8);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-brand p {
  font-size: var(--text-sm);
  margin-top: var(--space-4);
  line-height: var(--line-height-base);
  color: rgba(255,255,255,0.5);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
}

.footer-logo-name {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  font-weight: 700;
  color: #fff;
}

.footer-col h3 {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.4);
  margin-bottom: var(--space-4);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-col a {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.65);
  text-decoration: none;
  transition: color var(--ease);
}

.footer-col a:hover {
  color: #fff;
}

.footer-bottom {
  padding-top: var(--space-8);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.4);
}

.footer-bottom a {
  color: rgba(255,255,255,0.5);
  text-decoration: none;
  transition: color var(--ease);
}

.footer-bottom a:hover {
  color: rgba(255,255,255,0.8);
}

.footer-bottom-links {
  display: flex;
  gap: var(--space-6);
}

/* -----------------------------------------
   20. Utilities
   ----------------------------------------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.text-center { text-align: center; }
.text-muted   { color: var(--color-text-muted); }
.font-serif   { font-family: var(--font-serif); }

.prose-width {
  max-width: 680px;
}

/* Decorative divider */
.divider {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-block: var(--space-8);
  color: var(--color-text-muted);
  font-size: var(--text-xl);
}

.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

/* Pill badges */
.badge {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  border-radius: 999px;
  font-size: var(--text-xs);
  font-weight: 600;
}

.badge-primary {
  background: var(--color-primary-faint);
  color: var(--color-primary);
}

.badge-accent {
  background: var(--color-accent-faint);
  color: var(--color-accent);
}

/* -----------------------------------------
   21. Responsive
   ----------------------------------------- */
@media (max-width: 1023px) {
  /* Hide desktop nav, show hamburger */
  .nav-menu {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  /* Article layout: single column */
  .article-layout {
    grid-template-columns: 1fr;
  }

  .article-sidebar {
    position: static;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-4);
  }

  /* Hero: single column */
  .hero-inner {
    grid-template-columns: 1fr;
  }

  .hero-yinyang {
    display: none;
  }

  /* Footer: condensed */
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8) var(--space-6);
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

  /* Start here */
  .start-here {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  /* Quotes masonry */
  .quotes-masonry {
    columns: 1;
  }
}

@media (max-width: 639px) {
  /* Footer single column */
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }

  /* Cards single column */
  .cards-grid {
    grid-template-columns: 1fr;
  }

  /* Blog grid single column */
  .blog-grid {
    grid-template-columns: 1fr;
  }

  /* Hero actions stack */
  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    text-align: center;
    justify-content: center;
  }

  /* Books grid single column */
  .books-grid {
    grid-template-columns: 1fr;
  }

  /* Article padding */
  .article-layout {
    padding-block: var(--space-8);
  }

  .practice-box {
    padding: var(--space-5) var(--space-5);
  }

  .footer-bottom-links {
    flex-direction: column;
    gap: var(--space-2);
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .hero-yinyang {
    animation: none;
  }

  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}