/* ==========================================================================
   OPEH — Web 2.0+ Design System & Tokens
   ========================================================================== */

:root {
  --bg-color: #f7f5f4;
  --card-bg: #ffffff;
  --text-primary: #22201f;
  --text-secondary: #66605e;
  --border-color: #e3dad6;
  --border-subtle: #efe9e6;
  
  /* Neutral Pink Palette */
  --accent-pink: #b46a78;
  --accent-pink-hover: #9c5563;
  --accent-pink-subtle: #f8eff1;

  /* Typography Stacks */
  --font-sans: "Helvetica Neue", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  --font-serif: "Charter", "Georgia", "Cambria", "Times New Roman", serif;

  /* Layout */
  --max-width: 1040px;
  --read-width: 860px;
  --radius-lg: 16px;
  --radius-sm: 8px;
}

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

body {
  background-color: var(--bg-color);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* ==========================================================================
   Navigation Bar
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  background-color: rgba(248, 239, 241, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 2rem;
  z-index: 100;
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 1.5rem;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 400;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.nav-links a:hover, .nav-links a.active {
  color: var(--text-primary);
  background-color: var(--accent-pink-subtle);
}

.site-brand-mark {
  text-decoration: none;
}

.site-brand-mark span {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
  letter-spacing: 0.02em;
}

.site-brand-mark strong {
  color: var(--text-primary);
  font-weight: 700;
}

/* ==========================================================================
   Layout Containers
   ========================================================================== */

.page-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 4rem 2rem 6rem 2rem;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero-section {
  text-align: center;
  padding: 3.5rem 0 4rem 0;
}

@keyframes modernFadeIn {
  0% {
    opacity: 0;
    transform: translateY(12px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-acronym {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(4rem, 10vw, 7rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  animation: modernFadeIn 3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.hero-subline {
  margin-top: 1.25rem;
  font-family: var(--font-serif);
  font-size: clamp(1.2rem, 2.5vw, 1.5rem);
  font-weight: 400;
  color: var(--text-secondary);
  opacity: 0;
  animation: modernFadeIn 3s cubic-bezier(0.16, 1, 0.3, 1) 0.18s forwards;
}

.hero-subline strong {
  font-weight: 700;
  color: var(--text-primary);
}

/* ==========================================================================
   Manifesto Card Container
   ========================================================================== */

.manifesto-wrapper {
  max-width: var(--read-width);
  margin: 0 auto;
}

.manifesto-title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 400;
  line-height: 1.2;
  text-align: center;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
}

.manifesto-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 3rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.02);
}

.manifesto-content {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--text-primary);
}

.manifesto-list {
  list-style-position: outside;
  padding-left: 1.45rem;
}

.manifesto-list li::marker {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--accent-pink);
}

.manifesto-list h3 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}

.manifesto-list p {
  margin-bottom: 0;
}

.manifesto-content a {
  color: var(--accent-pink);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

.manifesto-content a:hover {
  color: var(--accent-pink-hover);
}

.content-section {
  margin-top: 3rem;
}

/* ==========================================================================
   Tracking Advice Article
   ========================================================================== */

.tracking-page {
  padding-top: 2.5rem;
}

.tracking-hero {
  max-width: var(--read-width);
  margin: 0 auto;
  padding: 2rem 0 2.75rem 0;
}

.article-kicker {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent-pink);
  margin-bottom: 0.75rem;
  opacity: 0;
  animation: modernFadeIn 3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.tracking-title {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 6vw, 4.25rem);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  opacity: 0;
  animation: modernFadeIn 3s cubic-bezier(0.16, 1, 0.3, 1) 0.08s forwards;
}

.advice-article {
  max-width: var(--read-width);
  margin: 0 auto;
  border-top: 1px solid var(--border-color);
  padding-top: 1.5rem;
}

.recommended-article {
  margin-top: 3.25rem;
}

.feedback-article {
  margin-top: 3.25rem;
}

.article-section-header {
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: 1rem;
  align-items: baseline;
  margin-bottom: 1.25rem;
}

.article-section-header span {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--accent-pink);
}

.article-section-header h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  font-weight: 400;
  line-height: 1.2;
}

.advice-section {
  display: grid;
  grid-template-columns: minmax(10rem, 14rem) 1fr;
  gap: 1.5rem;
  padding: 1.35rem 0;
  border-top: 1px solid var(--border-subtle);
}

.advice-section h3,
.recommendation-panel h3 {
  font-family: var(--font-serif);
  font-size: 1.18rem;
  line-height: 1.35;
  color: var(--text-primary);
}

.advice-section p,
.recommendation-panel p {
  font-family: var(--font-serif);
  font-size: 1.08rem;
  line-height: 1.8;
  color: var(--text-primary);
}

.recommendation-panel {
  background: linear-gradient(180deg, rgba(248, 239, 241, 0.72), rgba(255, 255, 255, 0.45));
  border-left: 3px solid var(--accent-pink);
  padding: 1.6rem 1.75rem;
}

.recommendation-panel p {
  margin-top: 0.85rem;
}

.recommendation-panel a {
  display: inline-block;
  margin-top: 1rem;
  color: var(--accent-pink);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

.recommendation-panel a:hover {
  color: var(--accent-pink-hover);
}

.feedback-note {
  font-family: var(--font-serif);
  font-size: 1.12rem;
  line-height: 1.85;
  color: var(--text-primary);
  border-top: 1px solid var(--border-subtle);
  padding-top: 1.35rem;
}

.feedback-note a {
  color: var(--accent-pink);
  font-weight: 700;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

.feedback-note a:hover {
  color: var(--accent-pink-hover);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  border-top: 1px solid var(--border-color);
  padding: 2.5rem 2rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  background-color: var(--card-bg);
}

.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Responsive */
@media (max-width: 768px) {
  .manifesto-card {
    padding: 1.75rem;
  }
  .nav-container {
    flex-direction: column-reverse;
    align-items: flex-start;
    gap: 1rem;
  }
  .advice-section,
  .article-section-header {
    grid-template-columns: 1fr;
    gap: 0.4rem;
  }
}