/* S2S2 Bespoke Design Stylesheet */

:root {
  /* HSL Tailored Colors - Warm Strategy Notebook Theme */
  --bg-h: 32;
  --bg-s: 24%;
  --bg-l: 97%;
  --bg-color: hsl(var(--bg-h), var(--bg-s), var(--bg-l));
  
  --bg-accent-l: 93%;
  --bg-accent: hsl(var(--bg-h), var(--bg-s), var(--bg-accent-l));
  
  --text-h: 30;
  --text-s: 12%;
  --text-l: 12%;
  --text-color: hsl(var(--text-h), var(--text-s), var(--text-l));
  
  --text-muted-l: 38%;
  --text-muted: hsl(var(--text-h), var(--text-s), var(--text-muted-l));
  
  --primary-h: 14;
  --primary-s: 76%;
  --primary-l: 45%;
  --primary: hsl(var(--primary-h), var(--primary-s), var(--primary-l));
  --primary-hover: hsl(var(--primary-h), var(--primary-s), calc(var(--primary-l) - 6%));
  --primary-glow: hsla(var(--primary-h), var(--primary-s), var(--primary-l), 0.12);
  
  --border-h: 30;
  --border-s: 14%;
  --border-l: 85%;
  --border-color: hsl(var(--border-h), var(--border-s), var(--border-l));
  
  --card-shadow: 0 4px 20px -2px hsla(var(--text-h), var(--text-s), var(--text-l), 0.05), 
                 0 2px 8px -1px hsla(var(--text-h), var(--text-s), var(--text-l), 0.03);
  --hover-shadow: 0 12px 32px -4px hsla(var(--text-h), var(--text-s), var(--text-l), 0.1), 
                  0 4px 12px -2px hsla(var(--text-h), var(--text-s), var(--text-l), 0.05);
  
  --border-radius: 12px;
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  --font-heading: "Arial Narrow", "Avenir Next Condensed", "Segoe UI", sans-serif;
  --font-body: Georgia, "Times New Roman", serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-h: 30;
    --bg-s: 8%;
    --bg-l: 8%;
    --bg-color: hsl(var(--bg-h), var(--bg-s), var(--bg-l));
    
    --bg-accent-l: 12%;
    --bg-accent: hsl(var(--bg-h), var(--bg-s), var(--bg-accent-l));
    
    --text-h: 30;
    --text-s: 10%;
    --text-l: 90%;
    --text-color: hsl(var(--text-h), var(--text-s), var(--text-l));
    
    --text-muted-l: 62%;
    --text-muted: hsl(var(--text-h), var(--text-s), var(--text-muted-l));
    
    --primary-h: 14;
    --primary-s: 85%;
    --primary-l: 58%;
    --primary: hsl(var(--primary-h), var(--primary-s), var(--primary-l));
    --primary-hover: hsl(var(--primary-h), var(--primary-s), calc(var(--primary-l) + 6%));
    --primary-glow: hsla(var(--primary-h), var(--primary-s), var(--primary-l), 0.25);
    
    --border-h: 30;
    --border-s: 10%;
    --border-l: 16%;
    --border-color: hsl(var(--border-h), var(--border-s), var(--border-l));
    
    --card-shadow: 0 4px 24px -4px rgba(0, 0, 0, 0.4), 0 2px 8px -2px rgba(0, 0, 0, 0.3);
    --hover-shadow: 0 16px 36px -6px rgba(0, 0, 0, 0.6), 0 4px 16px -2px rgba(0, 0, 0, 0.4);
  }
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: var(--font-body);
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-color);
}
::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* Selection */
::selection {
  background-color: var(--primary-glow);
  color: var(--primary);
}

/* Typography elements */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-color);
  margin-bottom: 0.5em;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--primary-hover);
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--border-color);
  background-color: hsla(var(--bg-h), var(--bg-s), var(--bg-l), 0.85);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: var(--transition);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 72px;
}

.site-logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-color);
  letter-spacing: -0.5px;
}

.site-logo .dot {
  color: var(--primary);
}

.site-nav ul {
  display: flex;
  list-style: none;
  gap: 32px;
}

.site-nav a {
  font-family: var(--font-heading);
  font-weight: 500;
  color: var(--text-muted);
  font-size: 1rem;
  position: relative;
  padding: 6px 0;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--text-color);
}

.site-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--primary);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.site-nav a:hover::after,
.site-nav a.active::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* Mobile Nav Toggle (Checkbox Hack) */
.nav-toggle {
  display: none;
}

.nav-toggle-label {
  display: none;
  cursor: pointer;
  padding: 10px;
  z-index: 150;
}

.nav-toggle-label span,
.nav-toggle-label span::before,
.nav-toggle-label span::after {
  display: block;
  background: var(--text-color);
  height: 2px;
  width: 22px;
  position: relative;
  transition: var(--transition);
}

.nav-toggle-label span::before,
.nav-toggle-label span::after {
  content: '';
  position: absolute;
}

.nav-toggle-label span::before {
  top: -6px;
}

.nav-toggle-label span::after {
  bottom: -6px;
}

/* Main Main */
.site-main {
  flex-grow: 1;
  padding: 48px 0 80px 0;
}

/* Hero Section */
.hero-section {
  padding: 32px 0 64px 0;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
  background-color: var(--primary-glow);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}

.hero-title {
  font-size: 3rem;
  letter-spacing: -1.5px;
  max-width: 800px;
  margin-bottom: 24px;
}

.hero-lead {
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 720px;
}

.hero-lead p {
  margin-bottom: 16px;
}

/* Notes Preview Section */
.notes-preview-section {
  padding: 48px 0;
  border-top: 1px dashed var(--border-color);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 36px;
}

.section-title {
  font-size: 1.75rem;
  letter-spacing: -0.5px;
}

.text-link {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
}

/* Grid Layout */
.notes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.note-card {
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.note-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--hover-shadow);
  border-color: hsla(var(--primary-h), var(--primary-s), var(--primary-l), 0.3);
}

.note-card-image {
  height: 180px;
  overflow: hidden;
  position: relative;
  background-color: var(--bg-accent);
}

.note-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.note-card:hover .note-card-image img {
  transform: scale(1.05);
}

.note-card-content {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.note-meta {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.note-card-title {
  font-size: 1.25rem;
  line-height: 1.35;
  margin-bottom: 12px;
  letter-spacing: -0.2px;
}

.note-card-title a {
  color: var(--text-color);
}

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

.note-card-summary {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex-grow: 1;
}

.note-card-link {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.9rem;
  margin-top: auto;
  align-self: flex-start;
}

/* CTA Section */
.cta-section {
  padding: 48px 0 0 0;
}

.cta-card {
  background: linear-gradient(135deg, var(--bg-accent), hsl(var(--bg-h), var(--bg-s), calc(var(--bg-accent-l) - 2%)));
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 48px;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.cta-title {
  font-size: 2rem;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
}

.cta-text {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 540px;
  margin: 0 auto 28px auto;
}

.btn-primary {
  display: inline-block;
  font-family: var(--font-heading);
  font-weight: 600;
  color: #ffffff;
  background-color: var(--primary);
  padding: 12px 28px;
  border-radius: var(--border-radius);
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 12px hsla(var(--primary-h), var(--primary-s), var(--primary-l), 0.3);
  transition: var(--transition);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px hsla(var(--primary-h), var(--primary-s), var(--primary-l), 0.4);
}

.btn-primary:active {
  transform: translateY(0);
}

/* List Template Page Header */
.page-header {
  padding: 32px 0 48px 0;
  border-bottom: 1px dashed var(--border-color);
  margin-bottom: 48px;
}

.page-title {
  font-size: 2.75rem;
  letter-spacing: -1px;
}

.page-description {
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 720px;
}

/* Notes List Page */
.notes-list {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.note-list-item {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 48px;
}

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

.note-list-meta {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.note-list-title {
  font-size: 1.75rem;
  letter-spacing: -0.5px;
  margin-bottom: 12px;
}

.note-list-title a {
  color: var(--text-color);
}

.note-list-title a:hover {
  color: var(--primary);
}

.note-list-summary {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  max-width: 800px;
}

.note-list-link {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
}

/* Single Article */
.single-article {
  max-width: 740px;
}

.article-header {
  margin-bottom: 40px;
}

.article-meta {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.article-title {
  font-size: 3rem;
  letter-spacing: -1.5px;
  line-height: 1.2;
  margin-bottom: 24px;
}

.article-featured-image {
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  margin-top: 32px;
  aspect-ratio: 16 / 9;
  background-color: var(--bg-accent);
}

.article-featured-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.article-content {
  font-size: 1.15rem;
  line-height: 1.8;
}

.article-content p {
  margin-bottom: 24px;
}

.article-content h2 {
  font-size: 1.75rem;
  letter-spacing: -0.5px;
  margin: 48px 0 20px 0;
}

.article-content h3 {
  font-size: 1.35rem;
  letter-spacing: -0.2px;
  margin: 32px 0 16px 0;
}

.article-content ul,
.article-content ol {
  margin-bottom: 24px;
  padding-left: 24px;
}

.article-content li {
  margin-bottom: 8px;
}

.article-content blockquote {
  border-left: 4px solid var(--primary);
  background-color: var(--bg-accent);
  padding: 16px 24px;
  margin: 32px 0;
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
  font-style: italic;
}

.article-content blockquote p {
  margin-bottom: 0;
}

.article-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--border-radius);
  margin: 32px auto;
  display: block;
  box-shadow: var(--card-shadow);
}

.article-footer {
  margin-top: 64px;
  padding-top: 32px;
  border-top: 1px solid var(--border-color);
}

/* Contact Form */
.contact-form-wrapper {
  margin-top: 40px;
  padding: 36px;
  background-color: var(--bg-accent);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-color);
}

.form-group input,
.form-group textarea {
  font-family: var(--font-body);
  font-size: 1.05rem;
  padding: 12px 16px;
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-color);
  transition: var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border-color);
  padding: 40px 0;
  background-color: var(--bg-accent);
  margin-top: 96px;
}

.footer-container {
  display: flex;
  justify-content: center;
  text-align: center;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Responsive styles */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2.25rem;
    letter-spacing: -1px;
  }
  
  .article-title {
    font-size: 2.25rem;
    letter-spacing: -1px;
  }

  .notes-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  /* Hamburger Navigation */
  .nav-toggle-label {
    display: block;
  }

  .site-nav {
    position: fixed;
    top: 72px;
    left: 0;
    width: 100%;
    height: 0;
    background-color: var(--bg-color);
    border-bottom: 0 solid var(--border-color);
    overflow: hidden;
    transition: all 0.35s cubic-bezier(0.25, 0.8, 0.25, 1);
    z-index: 100;
  }

  .site-nav ul {
    flex-direction: column;
    align-items: center;
    padding: 40px 0;
    gap: 24px;
  }

  .site-nav a {
    font-size: 1.25rem;
  }

  /* When checkbox is checked, expand mobile menu */
  .nav-toggle:checked ~ .site-nav {
    height: calc(100vh - 72px);
    border-bottom: 1px solid var(--border-color);
  }

  .nav-toggle:checked ~ .nav-toggle-label span {
    background: transparent;
  }

  .nav-toggle:checked ~ .nav-toggle-label span::before {
    transform: rotate(45deg);
    top: 0;
  }

  .nav-toggle:checked ~ .nav-toggle-label span::after {
    transform: rotate(-45deg);
    bottom: 0;
  }
}