/* ============================================================
   Reading Room — Main Stylesheet
   ============================================================ */

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

:root {
  --color-bg:        #faf9f6;
  --color-surface:   #ffffff;
  --color-text:      #2c2c2c;
  --color-text-muted:#6b6b6b;
  --color-accent:    #b85c38;
  --color-accent-hover: #9a4a2c;
  --color-border:    #e8e4dc;
  --color-header-bg: #f5f1eb;

  --font-heading: 'Georgia', 'Times New Roman', serif;
  --font-body:    'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;

  --max-width:     1100px;
  --gutter:        1.5rem;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
}

/* ----- Header ----- */
.site-header {
  background: var(--color-header-bg);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem var(--gutter);
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 700;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
}

.nav-links a {
  text-decoration: none;
  color: var(--color-text);
  font-size: 0.95rem;
  transition: color 0.2s;
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* ----- Dropdown ----- */
.nav-dropdown {
  position: relative;
}

.dropdown-trigger {
  background: none;
  border: none;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--color-text);
  cursor: pointer;
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
  transition: color 0.2s;
}

.dropdown-trigger:hover,
.dropdown-trigger[aria-expanded="true"] {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.1);
  min-width: 180px;
  list-style: none;
  padding: 0.5rem 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
  z-index: 200;
}

.dropdown-menu.open {
  opacity: 1;
  visibility: visible;
}

.dropdown-menu li a {
  display: block;
  padding: 0.5rem 1.25rem;
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.9rem;
  border-bottom: none;
  transition: background 0.15s, color 0.15s;
}

.dropdown-menu li a:hover {
  background: var(--color-bg);
  color: var(--color-accent);
  border-bottom: none;
}

/* ----- Hero ----- */
.hero {
  text-align: center;
  padding: 4rem var(--gutter) 3rem;
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: 2.8rem;
  color: var(--color-text);
  margin-bottom: 0.75rem;
}

.hero-subtitle {
  color: var(--color-text-muted);
  font-size: 1.2rem;
}

/* ----- Card Grid ----- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter) 4rem;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.08);
}

.card-img {
  display: block;
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.card-body {
  padding: 1.5rem;
}

.card-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  margin-bottom: 0.6rem;
  color: var(--color-text);
}

.card-text {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.65;
  margin-bottom: 1rem;
}

.card-link {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: color 0.2s;
}

.card-link:hover {
  color: var(--color-accent-hover);
}

/* ----- Article List (articles.html) ----- */
.article-list {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 var(--gutter) 4rem;
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

.article-item {
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 2.5rem;
}

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

.article-img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 360px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 1.5rem;
}

.article-body h2 {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  margin-bottom: 0.4rem;
  color: var(--color-text);
}

.article-meta {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  margin-bottom: 1rem;
}

.article-body p {
  color: var(--color-text);
  font-size: 1rem;
  line-height: 1.75;
  margin-bottom: 0.75rem;
}

/* ----- Page Content (About / Contact) ----- */
.page-content {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 var(--gutter) 4rem;
}

.content-section {
  margin-bottom: 2.5rem;
}

.content-section h2 {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  margin-bottom: 1rem;
  color: var(--color-text);
}

.content-section h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  margin-bottom: 0.75rem;
  margin-top: 1.5rem;
  color: var(--color-text);
}

.content-section p {
  margin-bottom: 1rem;
  line-height: 1.75;
}

.content-section ul {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
  line-height: 1.75;
}

.content-section li {
  margin-bottom: 0.4rem;
}

.content-section a {
  color: var(--color-accent);
  text-decoration: underline;
}

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

/* ----- Contact Grid ----- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.contact-info ul {
  list-style: none;
  padding-left: 0;
}

.contact-info li {
  margin-bottom: 0.6rem;
}

/* ----- Contact Form ----- */
.contact-form .form-group {
  margin-bottom: 1.25rem;
}

.contact-form label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.35rem;
  color: var(--color-text);
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  background: var(--color-surface);
  color: var(--color-text);
  transition: border-color 0.2s;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

.btn {
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  padding: 0.75rem 1.75rem;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s;
}

.btn:hover {
  background: var(--color-accent-hover);
}

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

/* ----- Footer ----- */
.site-footer {
  text-align: center;
  padding: 2rem var(--gutter);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.site-footer nav {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 0.75rem;
}

.site-footer nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color 0.2s;
}

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

/* ----- Article Pages ----- */
.article-header {
  max-width: 780px;
  margin: 0 auto;
  padding: 3rem 1.5rem 0;
}
.article-header img {
  width: 100%;
  height: auto;
  max-height: 420px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 1.5rem;
}
.article-header h1 {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  margin-bottom: 0.5rem;
}
.article-header .article-meta {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: 0;
}

.article-content {
  max-width: 780px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}
.article-content p {
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 1.25rem;
  color: var(--color-text);
}
.article-content h2 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  margin: 2.5rem 0 1rem;
  color: var(--color-text);
}
.article-content blockquote {
  border-left: 3px solid var(--color-accent);
  padding: 0.75rem 1.25rem;
  margin: 1.5rem 0;
  background: var(--color-header-bg);
  border-radius: 0 6px 6px 0;
  font-style: italic;
  color: var(--color-text-muted);
}
.article-content blockquote p {
  margin-bottom: 0;
}
.article-content h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  margin: 2rem 0 0.75rem;
  color: var(--color-text);
}
.article-content ul,
.article-content ol {
  padding-left: 1.5rem;
  margin-bottom: 1.25rem;
  line-height: 1.75;
  color: var(--color-text);
}
.article-content li {
  margin-bottom: 0.5rem;
}
.article-content a {
  color: var(--color-accent);
  text-decoration: underline;
}
.article-content a:hover {
  color: var(--color-accent-hover);
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  font-size: 0.9rem;
  line-height: 1.5;
}
.article-content th,
.article-content td {
  border: 1px solid var(--color-border);
  padding: 0.6rem 0.75rem;
  text-align: left;
  vertical-align: top;
}
.article-content th {
  background: var(--color-header-bg);
  font-weight: 700;
  color: var(--color-text);
}
.article-content td {
  color: var(--color-text);
}
.article-content .highlight-box {
  background: var(--color-header-bg);
  border: 2px solid var(--color-accent);
  border-radius: 8px;
  padding: 1.5rem;
  margin: 2rem 0;
}
.article-content .highlight-box p {
  margin-bottom: 0.75rem;
}
.article-content .highlight-box p:last-child {
  margin-bottom: 0;
}

.article-cta {
  text-align: center;
  padding: 2rem 0 3rem;
}
.article-cta a {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 600;
}
.article-cta a:hover {
  color: var(--color-accent-hover);
}

/* ----- Article Component: Use-Case Grid (22 Newsletter Platforms) ----- */
.use-case-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin: 1.5rem 0 2rem;
}
.use-case-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1.25rem;
}
.use-case-card h4 {
  font-family: var(--font-heading);
  font-size: 1rem;
  margin-bottom: 0.5rem;
  color: var(--color-accent);
}
.use-case-card p {
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 0;
  color: var(--color-text-muted);
}

/* ----- Article Component: Platform Card (Beehiiv vs Substack) ----- */
.platform-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}
.platform-card h3 {
  margin-top: 0;
}

/* ----- Article Component: Step Number / Newsletter Types (High-Performance Newsletter) ----- */
.step-number {
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  text-align: center;
  line-height: 2rem;
  font-weight: 700;
  font-size: 0.9rem;
  margin-right: 0.5rem;
}
.newsletter-types {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1.5rem 0;
}
.type-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1rem;
}
.type-card h4 {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  margin-bottom: 0.35rem;
  color: var(--color-accent);
}
.type-card p {
  font-size: 0.85rem;
  line-height: 1.5;
  margin-bottom: 0;
  color: var(--color-text-muted);
}

/* ----- Article Component: Stats Grid (Meawfy) ----- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}
.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1.25rem;
  text-align: center;
}
.stat-card .stat-number {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-accent);
  display: block;
  margin-bottom: 0.25rem;
}
.stat-card .stat-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ----- Article Component: Process Steps (SubsFinder) ----- */
.process-steps {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 1.25rem;
  margin: 2rem 0;
}
.process-step {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1.25rem;
  text-align: center;
}
.process-step .step-number {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-accent);
  display: block;
  margin-bottom: 0.25rem;
}
.process-step h4 {
  font-family: var(--font-heading);
  font-size: 1rem;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}
.process-step p {
  font-size: 0.9rem;
  line-height: 1.5;
  margin-bottom: 0;
  color: var(--color-text-muted);
}

/* ----- Article Component: FAQ Item ----- */
.faq-item {
  margin-bottom: 1.5rem;
}
.faq-item h3 {
  margin-top: 0;
}

/* ----- Article Component: Timeline (Original Version Learning) ----- */
.timeline {
  margin: 2rem 0;
  padding-left: 1.5rem;
  border-left: 3px solid var(--color-border);
}
.timeline-item {
  margin-bottom: 1.5rem;
  padding-left: 1rem;
  position: relative;
}
.timeline-item::before {
  content: "";
  position: absolute;
  left: -1.75rem;
  top: 0.5rem;
  width: 10px;
  height: 10px;
  background: var(--color-accent);
  border-radius: 50%;
}
.timeline-item h4 {
  font-family: var(--font-heading);
  font-size: 1rem;
  margin-bottom: 0.35rem;
  color: var(--color-accent);
}
.timeline-item p {
  font-size: 0.95rem;
  margin-bottom: 0;
  color: var(--color-text-muted);
}

/* ----- Responsive ----- */
@media (max-width: 600px) {
  .hero h1 {
    font-size: 1.8rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .header-inner {
    flex-direction: column;
    gap: 0.75rem;
  }

  .nav-links {
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .use-case-grid,
  .newsletter-types {
    grid-template-columns: 1fr;
  }
  .article-content table {
    font-size: 0.75rem;
  }
  .process-steps {
    grid-template-columns: 1fr;
  }
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }

  .dropdown-menu {
    left: auto;
    right: 0;
    transform: none;
  }

  .site-footer nav {
    flex-wrap: wrap;
    gap: 1rem;
  }
}