/* ==========================================================================
   Design System: Just the Basics Hub
   ========================================================================== */

:root {
  /* Brand Colors - Purple Primary, Orange Accent */
  --color-primary: #2D1B69;        /* Deep Royal Purple */
  --color-primary-dark: #1F0F4A;   /* Darker Purple for gradients */
  --color-action: #E07C00;         /* Rich Amber Orange */
  --color-action-light: #FF9F1C;   /* Brighter Orange for hover */
  --color-emphasis: #D93B3B;       /* Emphasis Red */
  
  /* Background and Text Colors */
  --color-bg-main: #FFFFFF;
  --color-bg-secondary: #F6F4FA;   /* Very subtle purple tint */
  --color-text-main: #1A1A1A;
  --color-text-muted: #4A4A4A;
  --color-border: #E4E0EC;        /* Subtle purple-gray border */
  
  /* Typography */
  --font-primary: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --base-font-size: 20px;
  --line-height-body: 1.6;
  
  /* Spacing & Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(45, 27, 105, 0.08);
  --shadow-md: 0 4px 12px rgba(45, 27, 105, 0.1);
}

/* ==========================================================================
   Base Styles
   ========================================================================== */

html {
  font-size: var(--base-font-size);
  box-sizing: border-box;
}

*, *:before, *:after {
  box-sizing: inherit;
}

body {
  font-family: var(--font-primary);
  color: var(--color-text-main);
  background-color: var(--color-bg-main);
  line-height: var(--line-height-body);
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

main {
  flex: 1;
  width: 100%;
}

/* ==========================================================================
   Typography Rules
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
  color: var(--color-primary);
  margin-top: 2rem;
  margin-bottom: 1rem;
  line-height: 1.2;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }

p {
  margin-bottom: 1.5rem;
}

/* ==========================================================================
   Links and Buttons (High Affordance)
   ========================================================================== */

a {
  color: #0056b3;
  text-decoration: underline;
  text-underline-offset: 4px;
}

a:hover {
  color: #003d82;
  text-decoration-thickness: 2px;
}

:is(h1, h2, h3, h4) a {
  color: var(--color-primary);
}

.button, button, input[type="submit"] {
  display: inline-block;
  background-color: var(--color-action);
  color: #1A1A1A;
  font-weight: 700;
  text-decoration: none;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid #cc6600;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: all 0.2s ease;
}

.button:hover, button:hover, input[type="submit"]:hover {
  background-color: var(--color-action-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.button:active, button:active, input[type="submit"]:active {
  transform: translateY(0px);
  box-shadow: var(--shadow-sm);
}

/* ==========================================================================
   Header
   ========================================================================== */

header.site-header {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: white;
  padding: 1rem 0;
  width: 100%;
  box-shadow: 0 2px 8px rgba(45, 27, 105, 0.15);
  transition: padding 0.3s ease;
}

/* Larger logo on homepage */
header.site-header--home {
  padding: 1.5rem 0;
}

header.site-header--home .site-title img {
  height: 64px !important;
}

header.site-header--home .site-title a {
  font-size: 2rem;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

.site-title {
  font-size: 1.75rem;
  font-weight: 800;
  margin: 0;
}

.site-title a {
  color: white;
  text-decoration: none;
}

nav.main-nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: 1.5rem;
}

nav.main-nav a {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  font-weight: 600;
  padding: 0.5rem 0;
  border-bottom: 2px solid transparent;
  transition: all 0.2s ease;
}

nav.main-nav a:hover {
  color: white;
  border-bottom-color: var(--color-action);
}

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

footer.site-footer {
  background-color: var(--color-bg-secondary);
  border-top: 2px solid var(--color-border);
  padding: 2rem 1rem;
  text-align: center;
  margin-top: 4rem;
}

/* ==========================================================================
   Three-Column Layout, Sidebars & Accordion
   ========================================================================== */

.site-container {
  display: grid;
  grid-template-columns: 280px 1fr 280px;
  gap: 2.5rem;
  max-width: 1600px;
  margin: 0 auto;
  padding: 2rem 1rem;
  align-items: start;
}

main#main-content {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  padding: 0;
}

.sidebar-box {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-sm);
}

.sidebar-title {
  margin-top: 0;
  margin-bottom: 1.25rem;
  font-size: 1.25rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  border-bottom: 2px solid var(--color-primary);
  padding-bottom: 0.5rem;
}

/* Left Sidebar Accordion */
.sidebar-left {
  background-color: #F4F0FA;
  border-left: 4px solid var(--color-action);
  border-radius: var(--radius-md);
}

.accordion-nav {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.accordion-item {
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 0.75rem;
}

.accordion-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.accordion-item summary {
  list-style: none;
  cursor: pointer;
  padding: 0.5rem 0;
}

.accordion-item summary::-webkit-details-marker {
  display: none;
}

.accordion-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-primary);
  user-select: none;
}

.accordion-header::after {
  content: '▼';
  font-size: 0.7rem;
  color: var(--color-action);
  transition: transform 0.2s ease;
}

details[open] .accordion-header::after {
  transform: rotate(180deg);
}

.accordion-content {
  list-style: none;
  padding: 0.5rem 0 0 1rem;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.accordion-content a {
  color: var(--color-text-main);
  text-decoration: none;
  font-weight: 500;
  display: block;
  padding: 0.25rem 0;
  border-radius: 4px;
  transition: all 0.15s ease;
}

.accordion-content a:hover {
  color: var(--color-action);
  text-decoration: underline;
  padding-left: 0.25rem;
}

.accordion-item.single-link {
  padding: 0.5rem 0;
}

.accordion-header-link {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-primary);
  text-decoration: none;
  display: block;
}

.accordion-header-link:hover {
  color: var(--color-action);
  text-decoration: underline;
}

.accordion-nav .active-link {
  color: var(--color-action) !important;
  font-weight: 800;
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

/* Right Sidebar & Widgets */
.widget-title {
  margin-top: 0;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-primary);
  border-bottom: 2px solid var(--color-action);
  padding-bottom: 0.5rem;
  margin-bottom: 1rem;
}

.featured-widget {
  background: linear-gradient(135deg, #FFF8F0 0%, #FFFDF9 100%);
  border: 1px solid #FFEACC;
  border-top: 4px solid var(--color-action);
  border-radius: var(--radius-md);
}

.featured-badge {
  display: inline-block;
  background-color: var(--color-emphasis);
  color: white;
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  margin-bottom: 0.5rem;
}

.featured-title {
  margin: 0 0 0.5rem 0;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-primary);
}

.widget-text {
  font-size: 0.95rem;
  margin-bottom: 1rem;
  color: var(--color-text-muted);
}

.button-emphasis {
  background-color: var(--color-emphasis);
  color: white;
  border: 1px solid #a31c1c;
  text-align: center;
}

.button-emphasis:hover {
  background-color: #b52020;
}

.button-fullwidth {
  display: block;
  width: 100%;
  box-sizing: border-box;
}

.recommendation-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.rec-link {
  text-decoration: none;
  color: inherit;
  display: block;
  padding: 0.75rem;
  border-radius: var(--radius-sm);
  background-color: var(--color-bg-main);
  border: 1px solid var(--color-border);
  transition: all 0.2s ease;
}

.rec-link:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.rec-name {
  display: block;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.25rem;
  font-size: 1rem;
}

.rec-desc {
  display: block;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.4;
}

.affiliate-disclaimer {
  font-size: 0.8rem;
  font-style: italic;
  color: var(--color-text-muted);
  margin-top: 1.5rem;
  margin-bottom: 0;
  line-height: 1.4;
}

/* ==========================================================================
   Newsletter Component
   ========================================================================== */

.newsletter-capture {
  background: linear-gradient(135deg, #EFEAF8 0%, #F8F5FF 100%);
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin: 3rem 0;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.newsletter-inner h2 {
  margin-top: 0;
  color: var(--color-primary);
}

.newsletter-form {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  max-width: 400px;
  margin: 2rem auto 1rem;
}

.newsletter-form .form-group {
  width: 100%;
  text-align: left;
}

.newsletter-form label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

/* ==========================================================================
   Hero Section (Homepage)
   ========================================================================== */

.hero {
  text-align: center;
  margin-bottom: 3rem;
  padding: 3rem 2rem;
  background: linear-gradient(135deg, #F4F0FA 0%, #FEFCF6 100%);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}

.hero h1 {
  margin-top: 0;
}

.hero p {
  font-size: 1.25rem;
  max-width: 600px;
  margin: 0 auto 2rem;
}

/* ==========================================================================
   Article List
   ========================================================================== */

article {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
  transition: all 0.2s ease;
}

article:hover {
  padding-left: 0.5rem;
}

article h3 {
  margin-bottom: 0.5rem;
  margin-top: 0;
}

article h3 a {
  color: var(--color-primary);
  text-decoration: none;
}

article h3 a:hover {
  color: var(--color-action);
  text-decoration: underline;
}

/* ==========================================================================
   Content Pages
   ========================================================================== */

.content {
  line-height: 1.8;
}

.content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

.content blockquote {
  border-left: 4px solid var(--color-action);
  margin: 1.5rem 0;
  padding: 0.5rem 1.5rem;
  background-color: var(--color-bg-secondary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.content code {
  background-color: #F4F0FA;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.9em;
}

.content pre {
  background-color: #1A1A2E;
  color: #E4E0EC;
  padding: 1.5rem;
  border-radius: var(--radius-md);
  overflow-x: auto;
}

/* ==========================================================================
   Tags & Metadata
   ========================================================================== */

.tag-badge {
  display: inline-block;
  background-color: #F4F0FA;
  color: var(--color-primary);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: 20px;
  border: 1px solid var(--color-border);
  text-decoration: none;
  transition: all 0.15s ease;
}

.tag-badge:hover {
  background-color: var(--color-action);
  color: #1A1A1A;
  border-color: var(--color-action);
}

.level-badge {
  display: inline-block;
  background-color: var(--color-primary);
  color: white;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: 20px;
}

/* ==========================================================================
   Responsive Adjustments
   ========================================================================== */

@media (max-width: 1100px) {
  .site-container {
    grid-template-columns: 240px 1fr;
    gap: 1.5rem;
  }
  .sidebar-right {
    display: none;
  }
}

@media (max-width: 768px) {
  .header-inner {
    flex-direction: column;
    text-align: center;
    gap: 1rem;
  }
  
  nav.main-nav ul {
    flex-wrap: wrap;
    justify-content: center;
  }

  .site-container {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .sidebar-left {
    order: -1;
    border-left: none;
    border-top: 4px solid var(--color-action);
    border-radius: var(--radius-md);
  }

  .sidebar-right {
    display: block;
  }
}