/* Premium stylesheet for the Product Leadership Growth Program local vault */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&display=swap');

:root {
  --bg-primary: hsl(210, 30%, 98%);
  --bg-card: hsl(0, 0%, 100%);
  --text-primary: hsl(222, 47%, 12%);
  --text-secondary: hsl(215, 16%, 47%);
  --primary: hsl(238, 83%, 58%);
  --primary-hover: hsl(238, 83%, 50%);
  --border-color: hsl(214, 32%, 91%);
  
  --table-header-bg: hsl(222, 47%, 18%);
  --table-header-text: hsl(0, 0%, 100%);
  --row-alt: hsl(210, 30%, 99%);
  
  --callout-note-bg: hsl(210, 100%, 96%);
  --callout-note-border: hsl(210, 100%, 60%);
  --callout-note-text: hsl(210, 100%, 25%);
  
  --callout-warning-bg: hsl(38, 100%, 96%);
  --callout-warning-border: hsl(38, 100%, 50%);
  --callout-warning-text: hsl(38, 80%, 25%);
  
  --callout-danger-bg: hsl(0, 100%, 97%);
  --callout-danger-border: hsl(0, 100%, 65%);
  --callout-danger-text: hsl(0, 80%, 25%);
  
  --callout-info-bg: hsl(190, 100%, 96%);
  --callout-info-border: hsl(190, 100%, 45%);
  --callout-info-text: hsl(190, 80%, 25%);
  
  --callout-tip-bg: hsl(145, 80%, 96%);
  --callout-tip-border: hsl(145, 80%, 40%);
  --callout-tip-text: hsl(145, 80%, 20%);
  
  --shadow-sm: 0 1px 3px 0 rgba(0,0,0,0.05), 0 1px 2px 0 rgba(0,0,0,0.03);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.05), 0 2px 4px -1px rgba(0,0,0,0.03);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  line-height: 1.6;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 2.5rem 2rem;
  background-color: var(--bg-card);
  min-height: 100vh;
  box-shadow: var(--shadow-md);
}

/* Premium Header Navigation Bar */
.nav-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 3rem;
  background-color: var(--bg-card);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: 'Outfit', sans-serif;
  font-size: 1.05rem;
  font-weight: 600;
  color: hsl(222, 47%, 15%) !important;
  border-bottom: none !important;
  transition: transform 0.2s ease, color 0.2s ease;
}

.back-link:hover {
  color: var(--primary) !important;
  transform: translateX(-2px);
}

.back-link svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  stroke-width: 2.5;
  transition: transform 0.2s ease;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-links a {
  font-family: 'Inter', sans-serif;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 0.5rem 0.85rem;
  border-radius: 8px;
  border-bottom: none !important;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  background-color: transparent;
}

.nav-links a:hover {
  color: hsl(222, 47%, 15%);
  background-color: hsl(210, 30%, 95%);
}

.nav-links a.active {
  color: var(--primary);
  background-color: hsl(238, 83%, 96%);
  font-weight: 600;
  box-shadow: 0 1px 2px 0 rgba(238, 83, 58, 0.05);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Outfit', sans-serif;
  color: hsl(222, 47%, 15%);
  margin-top: 2rem;
  margin-bottom: 1rem;
  font-weight: 700;
}

h1 {
  font-size: 2.25rem;
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 0.5rem;
  margin-top: 0;
}

h2 {
  font-size: 1.65rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.25rem;
}

h3 {
  font-size: 1.25rem;
}

h4 {
  font-size: 1.05rem;
}

p {
  margin-bottom: 1.25rem;
  color: hsl(222, 47%, 18%);
}

a {
  color: var(--primary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: all 0.15s ease;
}

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

/* Bullet Points & Lists */
ul, ol {
  margin-bottom: 1.5rem;
  padding-left: 2rem;
}

li {
  margin-bottom: 0.5rem;
}

li > ul, li > ol {
  margin-top: 0.5rem;
  margin-bottom: 0;
}

/* Checklist custom styling */
.task-list-item {
  list-style-type: none;
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  margin-bottom: 0.4rem;
}

.task-list-item input[type="checkbox"] {
  margin-top: 0.35rem;
  cursor: not-allowed;
}

/* Code */
pre {
  background-color: hsl(210, 20%, 96%);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 1rem;
  overflow-x: auto;
  margin-bottom: 1.5rem;
}

code {
  font-family: SFMono-Regular, Consolas, "Liberation Mono", Menlo, Courier, monospace;
  font-size: 0.9em;
  background-color: hsl(210, 20%, 96%);
  padding: 0.15rem 0.3rem;
  border-radius: 4px;
}

pre code {
  background-color: transparent;
  padding: 0;
}

/* Tables */
.table-wrapper {
  overflow-x: auto;
  margin: 2rem 0;
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  text-align: left;
}

th {
  background-color: var(--table-header-bg);
  color: var(--table-header-text);
  padding: 1rem 0.8rem;
  font-weight: 600;
  font-family: 'Outfit', sans-serif;
  border: 1px solid var(--table-header-bg);
}

td {
  padding: 0.8rem;
  border: 1px solid var(--border-color);
  vertical-align: top;
  line-height: 1.5;
}

tr:nth-child(even) td {
  background-color: var(--row-alt);
}

/* Callouts / Alerts */
.callout {
  border-left: 4px solid;
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  border-radius: 4px;
  box-shadow: var(--shadow-sm);
}

.callout p:last-child {
  margin-bottom: 0;
}

.callout-note {
  background-color: var(--callout-note-bg);
  border-left-color: var(--callout-note-border);
  color: var(--callout-note-text);
}
.callout-note h2, .callout-note h3, .callout-note h4 {
  color: var(--callout-note-text);
  margin-top: 0;
  margin-bottom: 0.5rem;
}

.callout-warning {
  background-color: var(--callout-warning-bg);
  border-left-color: var(--callout-warning-border);
  color: var(--callout-warning-text);
}
.callout-warning h2, .callout-warning h3, .callout-warning h4 {
  color: var(--callout-warning-text);
  margin-top: 0;
  margin-bottom: 0.5rem;
}

.callout-danger, .callout-caution {
  background-color: var(--callout-danger-bg);
  border-left-color: var(--callout-danger-border);
  color: var(--callout-danger-text);
}
.callout-danger h2, .callout-danger h3, .callout-danger h4 {
  color: var(--callout-danger-text);
  margin-top: 0;
  margin-bottom: 0.5rem;
}

.callout-info, .callout-important {
  background-color: var(--callout-info-bg);
  border-left-color: var(--callout-info-border);
  color: var(--callout-info-text);
}
.callout-info h2, .callout-info h3, .callout-info h4 {
  color: var(--callout-info-text);
  margin-top: 0;
  margin-bottom: 0.5rem;
}

.callout-tip {
  background-color: var(--callout-tip-bg);
  border-left-color: var(--callout-tip-border);
  color: var(--callout-tip-text);
}
.callout-tip h2, .callout-tip h3, .callout-tip h4 {
  color: var(--callout-tip-text);
  margin-top: 0;
  margin-bottom: 0.5rem;
}

/* Embedded Images */
.image-wrapper {
  text-align: center;
  margin: 2rem 0;
}
.embedded-image {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
}

.tag {
  display: inline-block;
  padding: 0.15rem 0.4rem;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 4px;
  text-transform: uppercase;
}

.tag.in-progress {
  background-color: hsl(45, 100%, 85%);
  color: hsl(45, 100%, 20%);
}

hr {
  border: 0;
  border-top: 1px solid var(--border-color);
  margin: 2.5rem 0;
}

footer {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  margin-top: 4rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-style: italic;
}