/* ============================================================
   Metabolic Mastery — Course Website Stylesheet
   A 14-part coaching course
   ============================================================ */

/* ----------------------------------------------------------
   1. Custom Properties (Design Tokens)
   ---------------------------------------------------------- */
:root {
  /* Palette */
  --color-bg:            #faf8f5;
  --color-bg-alt:        #f3f0eb;
  --color-bg-muted:      #ece8e1;
  --color-surface:       #ffffff;
  --color-text:          #2c2c2c;
  --color-text-secondary:#5a5650;
  --color-text-light:    #8a847c;
  --color-accent:        #b85c38;
  --color-accent-hover:  #a04e2e;
  --color-accent-light:  rgba(184, 92, 56, 0.08);
  --color-accent-border: rgba(184, 92, 56, 0.25);
  --color-sage:          #6b7c5e;
  --color-sage-hover:    #5a6a4f;
  --color-sage-light:    rgba(107, 124, 94, 0.10);
  --color-border:        #ddd8d0;
  --color-border-light:  #e8e4de;
  --color-nav-bg:        #2c2c2c;
  --color-nav-text:      #faf8f5;
  --color-overlay:       rgba(44, 44, 44, 0.55);

  /* Typography */
  --font-body: "Inter", "Segoe UI", Roboto, -apple-system,
               BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --font-heading: "Inter", "Segoe UI", Roboto, -apple-system,
                  BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;

  /* Scale (mobile-first, overridden at breakpoints) */
  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1.05rem;
  --text-lg:   1.2rem;
  --text-xl:   1.45rem;
  --text-2xl:  1.75rem;
  --text-3xl:  2.15rem;
  --text-4xl:  2.75rem;

  --leading-tight:  1.25;
  --leading-normal: 1.7;
  --leading-loose:  1.85;

  --weight-normal:   400;
  --weight-medium:   500;
  --weight-semibold: 600;
  --weight-bold:     700;

  /* Spacing */
  --space-xs:  0.375rem;
  --space-sm:  0.75rem;
  --space-md:  1.25rem;
  --space-lg:  2rem;
  --space-xl:  3rem;
  --space-2xl: 4.5rem;
  --space-3xl: 6rem;

  /* Layout */
  --max-width:         52rem;
  --max-width-wide:    68rem;
  --nav-height:        3.75rem;
  --border-radius:     6px;
  --border-radius-lg:  10px;

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition-base:   250ms ease;
  --transition-slow:   400ms ease;
}


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

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

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

img,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

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

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

::selection {
  background-color: var(--color-accent);
  color: #fff;
}


/* ----------------------------------------------------------
   3. Typography
   ---------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
  color: var(--color-text);
}

h1 {
  font-size: var(--text-3xl);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-md);
}

h2 {
  font-size: var(--text-2xl);
  letter-spacing: -0.015em;
  margin-bottom: var(--space-md);
}

h3 {
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
  margin-bottom: var(--space-sm);
}

h4 {
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  margin-bottom: var(--space-sm);
}

p {
  margin-bottom: var(--space-md);
}

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

strong {
  font-weight: var(--weight-semibold);
}

small {
  font-size: var(--text-sm);
}


/* ----------------------------------------------------------
   4. Utility: Container
   ---------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

.container--wide {
  max-width: var(--max-width-wide);
}


/* ----------------------------------------------------------
   5. Navigation
   ---------------------------------------------------------- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--color-nav-bg);
  color: var(--color-nav-text);
  height: var(--nav-height);
  display: flex;
  align-items: center;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
}

.site-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-width-wide);
}

/* Brand / course title */
.nav-brand {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  color: var(--color-nav-text);
  letter-spacing: -0.01em;
  text-decoration: none;
  white-space: nowrap;
  transition: opacity var(--transition-fast);
}

.nav-brand:hover {
  color: var(--color-nav-text);
  opacity: 0.85;
}

/* Hamburger */
.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.25rem;
  height: 2.25rem;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.35rem;
  -webkit-tap-highlight-color: transparent;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-nav-text);
  border-radius: 1px;
  transition: transform var(--transition-base),
              opacity var(--transition-base);
}

/* Hamburger → X animation */
.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Nav links panel */
.nav-links {
  list-style: none;
  position: fixed;
  inset: var(--nav-height) 0 0 0;
  background-color: var(--color-nav-bg);
  display: flex;
  flex-direction: column;
  padding: var(--space-lg) var(--space-md);
  gap: var(--space-xs);
  transform: translateX(100%);
  transition: transform var(--transition-base);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.nav-links.open {
  transform: translateX(0);
}

.nav-links a,
.nav-links span {
  display: block;
  padding: var(--space-sm) var(--space-sm);
  color: var(--color-nav-text);
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  border-radius: var(--border-radius);
  transition: background-color var(--transition-fast),
              color var(--transition-fast);
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  background-color: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.nav-links a.active,
.nav-dropdown-toggle.active {
  color: var(--color-accent);
}

/* Coming-soon nav items */
.nav-links .coming-soon {
  color: rgba(250, 248, 245, 0.32);
  cursor: default;
  pointer-events: none;
  user-select: none;
}

.nav-links .coming-soon::after {
  content: "soon";
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-left: var(--space-sm);
  opacity: 0.6;
}

/* Mobile dropdown toggle and menu */
.nav-dropdown-toggle {
  display: block;
  width: 100%;
  padding: var(--space-sm);
  color: var(--color-nav-text);
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  background: none;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  text-align: left;
  transition: background-color var(--transition-fast);
}

.nav-dropdown-toggle:hover {
  background-color: rgba(255, 255, 255, 0.08);
}

.nav-dropdown-toggle.active {
  color: var(--color-accent);
}

.nav-dropdown-toggle::after {
  content: "";
  display: inline-block;
  width: 0.4em;
  height: 0.4em;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  margin-left: 0.5em;
  vertical-align: 0.1em;
  transition: transform var(--transition-fast);
}

.nav-dropdown.open .nav-dropdown-toggle::after {
  transform: rotate(-135deg);
}

.nav-dropdown-menu {
  display: none;
  padding-left: var(--space-md);
}

.nav-dropdown.open .nav-dropdown-menu {
  display: block;
}

/* Nav group label (e.g., "Upcoming") */
.nav-group-label {
  display: block;
  padding: var(--space-md) var(--space-sm) var(--space-xs);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(250, 248, 245, 0.4);
}

/* Overlay behind mobile nav */
.nav-overlay {
  position: fixed;
  inset: 0;
  background-color: var(--color-overlay);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base),
              visibility var(--transition-base);
}

.nav-overlay.is-visible {
  opacity: 1;
  visibility: visible;
}


/* ----------------------------------------------------------
   6. Hero / Page Header
   ---------------------------------------------------------- */
.hero {
  background-color: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border-light);
  padding: var(--space-2xl) 0 var(--space-xl);
  text-align: center;
}

.hero__label,
.hero .section-label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.hero__title {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-sm);
}

.hero__subtitle,
.hero-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  font-weight: var(--weight-normal);
  max-width: 38rem;
  margin-inline: auto;
  line-height: var(--leading-normal);
}

.hero-description {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  max-width: 42rem;
  margin-inline: auto;
  margin-top: var(--space-md);
  line-height: var(--leading-normal);
}


/* ----------------------------------------------------------
   7. Content Sections
   ---------------------------------------------------------- */
.section {
  padding: var(--space-2xl) 0;
}

.section:nth-child(even) {
  background-color: var(--color-bg-alt);
}

.section--muted {
  background-color: var(--color-bg-alt);
}

.section--accent {
  background-color: var(--color-accent-light);
}

/* Section content wrapper with readable max-width */
.section__body {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-md);
}


/* ----------------------------------------------------------
   8. Section Labels
   ---------------------------------------------------------- */
.section-label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-sage);
  margin-bottom: var(--space-sm);
  padding-bottom: var(--space-xs);
  border-bottom: 2px solid var(--color-sage);
}

.section-label--accent {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}


/* ----------------------------------------------------------
   9. Cards
   ---------------------------------------------------------- */
.card-grid {
  display: grid;
  gap: var(--space-md);
  grid-template-columns: 1fr;
}

.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--border-radius-lg);
  padding: var(--space-lg);
  transition: box-shadow var(--transition-base),
              transform var(--transition-base);
}

.card:hover {
  box-shadow: 0 4px 20px rgba(44, 44, 44, 0.07);
  transform: translateY(-2px);
}

.card__label {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-light);
  margin-bottom: var(--space-xs);
}

.card__title {
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  margin-bottom: var(--space-sm);
}

.card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
}

/* Clickable card */
a.card {
  color: inherit;
  text-decoration: none;
  display: block;
}

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

/* Coming-soon card */
.card.card--disabled {
  opacity: 0.5;
  pointer-events: none;
  cursor: default;
}

.card.card--disabled:hover {
  box-shadow: none;
  transform: none;
}

/* Three-column layout */
.three-columns {
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: 1fr;
}

@media (min-width: 600px) {
  .three-columns {
    grid-template-columns: repeat(3, 1fr);
  }
}

.three-columns .column h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-sm);
}

.three-columns .column p {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
}

/* Module roadmap grid and cards */
.module-grid {
  display: grid;
  gap: var(--space-md);
  grid-template-columns: 1fr;
}

.module-card {
  display: block;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-left: 4px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: var(--space-md) var(--space-lg);
  text-decoration: none;
  color: var(--color-text);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.module-card--active {
  border-left-color: var(--color-accent);
}

.module-card--active:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  transform: translateY(-2px);
}

.module-card--disabled {
  opacity: 0.55;
  cursor: default;
}

.module-card-number {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: var(--space-2xs);
}

.module-card--disabled .module-card-number {
  color: var(--color-text-light);
}

.module-card h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-2xs);
}

.module-card p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin: 0;
}

.module-card .badge {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-light);
  background: var(--color-bg-muted);
  padding: 0.15em 0.6em;
  border-radius: 999px;
  margin-top: var(--space-xs);
}

@media (min-width: 600px) {
  .module-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .module-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}


/* ----------------------------------------------------------
   10. Resource Link Cards
   ---------------------------------------------------------- */
.resource-card {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-left: 3px solid var(--color-sage);
  border-radius: var(--border-radius);
  padding: var(--space-md) var(--space-lg);
  text-decoration: none;
  color: inherit;
  transition: box-shadow var(--transition-base),
              border-left-color var(--transition-base);
}

.resource-card:hover {
  box-shadow: 0 2px 12px rgba(44, 44, 44, 0.06);
  border-left-color: var(--color-accent);
  color: inherit;
}

.resource-card__icon {
  flex-shrink: 0;
  width: 2.25rem;
  height: 2.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-sage-light);
  color: var(--color-sage);
  border-radius: var(--border-radius);
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
}

.resource-card__body {
  flex: 1;
}

.resource-card__title {
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  margin-bottom: 0.2rem;
}

.resource-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
}

.resource-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}


/* ----------------------------------------------------------
   11. Calculator Widgets
   ---------------------------------------------------------- */
.calculator {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--space-lg);
  margin: var(--space-lg) 0;
}

.calculator__title {
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  margin-bottom: var(--space-md);
}

.form-group {
  margin-bottom: var(--space-md);
}

.form-group label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xs);
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group input[type="email"],
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.65rem 0.85rem;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  transition: border-color var(--transition-fast),
              box-shadow var(--transition-fast);
  appearance: none;
  -webkit-appearance: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-border);
}

.form-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.form-row .form-group {
  flex: 1;
  min-width: 10rem;
}

/* Radio / checkbox groups laid out inline */
.form-group--inline {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm) var(--space-md);
  align-items: center;
}

.form-group--inline label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: var(--text-base);
  color: var(--color-text);
  font-weight: var(--weight-normal);
  cursor: pointer;
}

.form-group--inline input[type="radio"],
.form-group--inline input[type="checkbox"] {
  accent-color: var(--color-accent);
  width: 1.1em;
  height: 1.1em;
}

.calculator__result {
  margin-top: var(--space-md);
  padding: var(--space-md);
  background-color: var(--color-accent-light);
  border: 1px solid var(--color-accent-border);
  border-radius: var(--border-radius);
  display: none;               /* shown via JS */
}

.calculator__result.is-visible {
  display: block;
}

.calculator__result-value {
  font-size: var(--text-2xl);
  font-weight: var(--weight-bold);
  color: var(--color-accent);
}

.calculator__result-label {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-top: 0.15rem;
}


/* ----------------------------------------------------------
   12. Blockquotes (Coach Voice)
   ---------------------------------------------------------- */
blockquote {
  border-left: 3px solid var(--color-accent);
  margin: var(--space-lg) 0;
  padding: var(--space-md) var(--space-lg);
  background-color: var(--color-accent-light);
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
}

blockquote p:last-child {
  margin-bottom: 0;
}

blockquote cite,
blockquote footer {
  display: block;
  margin-top: var(--space-sm);
  font-size: var(--text-sm);
  font-style: normal;
  font-weight: var(--weight-semibold);
  color: var(--color-accent);
}


/* ----------------------------------------------------------
   13. Lists
   ---------------------------------------------------------- */
ul, ol {
  padding-left: 1.4em;
  margin-bottom: var(--space-md);
}

li {
  margin-bottom: var(--space-sm);
  line-height: var(--leading-normal);
}

li:last-child {
  margin-bottom: 0;
}

li::marker {
  color: var(--color-sage);
}

/* Clean check-style list */
.checklist {
  list-style: none;
  padding-left: 0;
}

.checklist li {
  position: relative;
  padding-left: 1.6em;
}

.checklist li::before {
  content: "\2713";
  position: absolute;
  left: 0;
  color: var(--color-sage);
  font-weight: var(--weight-bold);
}


/* ----------------------------------------------------------
   14. Buttons
   ---------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4em;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  line-height: 1;
  padding: 0.75em 1.6em;
  border-radius: var(--border-radius);
  border: 2px solid transparent;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color var(--transition-fast),
              color var(--transition-fast),
              border-color var(--transition-fast),
              box-shadow var(--transition-fast),
              transform var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
}

.btn:active {
  transform: scale(0.97);
}

/* Primary */
.btn--primary {
  background-color: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: #fff;
}

/* Secondary / Outlined */
.btn--secondary {
  background-color: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.btn--secondary:hover,
.btn--secondary:focus-visible {
  background-color: var(--color-accent);
  color: #fff;
}

/* Sage variant */
.btn--sage {
  background-color: var(--color-sage);
  color: #fff;
  border-color: var(--color-sage);
}

.btn--sage:hover,
.btn--sage:focus-visible {
  background-color: var(--color-sage-hover);
  border-color: var(--color-sage-hover);
  color: #fff;
}

/* Large button */
.btn--lg {
  font-size: var(--text-base);
  padding: 0.85em 2em;
}

/* Full-width on mobile */
.btn--block {
  width: 100%;
}


/* ----------------------------------------------------------
   15. Progress Indicator (14 segments)
   ---------------------------------------------------------- */
.progress-bar {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: var(--space-md) 0;
  justify-content: center;
}

.progress-bar > span {
  width: 100%;
  max-width: 2.5rem;
  height: 5px;
  border-radius: 3px;
  background-color: var(--color-border);
  transition: background-color var(--transition-base);
}

.progress-bar > span.active {
  background-color: var(--color-accent);
}

.progress-bar > span.complete {
  background-color: var(--color-sage);
}

.progress-bar__segment {
  width: 100%;
  max-width: 2.5rem;
  height: 5px;
  border-radius: 3px;
  background-color: var(--color-border);
  transition: background-color var(--transition-base);
}

.progress-bar__segment--complete {
  background-color: var(--color-sage);
}

.progress-bar__segment--current {
  background-color: var(--color-accent);
}

/* Dot style variant */
.progress-dots {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: var(--space-md) 0;
  justify-content: center;
  flex-wrap: wrap;
}

.progress-dots__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--color-border);
  transition: background-color var(--transition-base),
              transform var(--transition-base);
}

.progress-dots__dot--complete {
  background-color: var(--color-sage);
}

.progress-dots__dot--current {
  background-color: var(--color-accent);
  transform: scale(1.35);
}

/* Progress text ("Module 3 of 14") */
.progress-text {
  text-align: center;
  font-size: var(--text-sm);
  color: var(--color-text-light);
  margin-top: var(--space-xs);
}


/* ----------------------------------------------------------
   16. Module Navigation (Prev / Next)
   ---------------------------------------------------------- */
.module-nav {
  display: flex;
  justify-content: space-between;
  align-items: stretch;
  gap: var(--space-md);
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--color-border-light);
  margin-top: var(--space-xl);
}

.module-nav__link {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  text-decoration: none;
  color: inherit;
  padding: var(--space-sm) 0;
  max-width: 48%;
  transition: color var(--transition-fast);
}

.module-nav__link:hover {
  color: var(--color-accent);
}

.module-nav__link--next {
  text-align: right;
  margin-left: auto;
}

.module-nav__direction {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-light);
}

.module-nav__title {
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
}


/* ----------------------------------------------------------
   17. Footer
   ---------------------------------------------------------- */
.site-footer {
  background-color: var(--color-nav-bg);
  color: rgba(250, 248, 245, 0.6);
  padding: var(--space-xl) 0;
  font-size: var(--text-sm);
  text-align: center;
  margin-top: auto;
}

.site-footer a {
  color: rgba(250, 248, 245, 0.8);
}

.site-footer a:hover {
  color: #fff;
}

.site-footer__inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  align-items: center;
}


/* ----------------------------------------------------------
   18. Inline Helpers / Utilities
   ---------------------------------------------------------- */
.text-accent  { color: var(--color-accent); }
.text-sage    { color: var(--color-sage); }
.text-muted   { color: var(--color-text-light); }
.text-center  { text-align: center; }
.text-sm      { font-size: var(--text-sm); }

.mt-0  { margin-top: 0; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-0  { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.pt-0  { padding-top: 0; }
.pb-0  { padding-bottom: 0; }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Divider */
.divider {
  border: none;
  border-top: 1px solid var(--color-border-light);
  margin: var(--space-xl) 0;
}


/* ----------------------------------------------------------
   19. Reflection / Callout Box
   ---------------------------------------------------------- */
.callout {
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--space-lg);
  margin: var(--space-lg) 0;
  background-color: var(--color-surface);
}

.callout--sage {
  border-color: var(--color-sage);
  background-color: var(--color-sage-light);
}

.callout--accent {
  border-color: var(--color-accent-border);
  background-color: var(--color-accent-light);
}

.callout__title {
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  margin-bottom: var(--space-sm);
}


/* ----------------------------------------------------------
   20. Tables (for data display)
   ---------------------------------------------------------- */
.table-wrap {
  overflow-x: auto;
  margin: var(--space-lg) 0;
  -webkit-overflow-scrolling: touch;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

th, td {
  padding: 0.6rem 0.85rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border-light);
}

th {
  font-weight: var(--weight-semibold);
  color: var(--color-text-secondary);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background-color: var(--color-bg-alt);
}

tbody tr:hover {
  background-color: var(--color-bg-alt);
}


/* ----------------------------------------------------------
   21. Focus Styles (Accessibility)
   ---------------------------------------------------------- */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: none; /* handled by box-shadow above */
}


/* ============================================================
   22. Responsive: Tablet (≥ 600px)
   ============================================================ */
@media (min-width: 600px) {
  :root {
    --text-3xl: 2.5rem;
    --text-4xl: 3.25rem;
  }

  .container {
    padding-inline: var(--space-lg);
  }

  .hero {
    padding: var(--space-3xl) 0 var(--space-2xl);
  }

  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .btn--block {
    width: auto;
  }
}


/* ============================================================
   23. Responsive: Desktop (≥ 900px)
   ============================================================ */
@media (min-width: 900px) {
  :root {
    --text-base: 1.1rem;
    --text-3xl:  2.65rem;
    --text-4xl:  3.5rem;
    --nav-height: 4rem;
  }

  /* Nav goes horizontal */
  .nav-toggle {
    display: none;
  }

  .nav-links {
    position: static;
    transform: none;
    flex-direction: row;
    padding: 0;
    gap: 0;
    background: none;
    overflow: visible;
    align-items: center;
  }

  .nav-links a,
  .nav-links span {
    padding: 0.45rem 0.75rem;
    font-size: var(--text-sm);
  }

  .nav-group-label {
    display: none; /* group labels hidden on desktop; rely on dropdown */
  }

  /* Desktop dropdown for grouped "upcoming" items */
  .nav-dropdown {
    position: relative;
  }

  .nav-dropdown-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.3em;
    padding: 0.45rem 0.75rem;
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    color: var(--color-nav-text);
    background: none;
    border: none;
    cursor: pointer;
    border-radius: var(--border-radius);
    font-family: var(--font-body);
    transition: background-color var(--transition-fast);
  }

  .nav-dropdown-toggle:hover {
    background-color: rgba(255, 255, 255, 0.08);
  }

  .nav-dropdown-toggle.active {
    color: var(--color-accent);
  }

  .nav-dropdown-toggle::after {
    content: "";
    display: inline-block;
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 4px solid currentColor;
    margin-top: 1px;
    transition: transform var(--transition-fast);
  }

  .nav-dropdown-menu {
    display: block;
    position: absolute;
    top: calc(100% + 0.35rem);
    right: 0;
    min-width: 12rem;
    background-color: var(--color-nav-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
    padding: var(--space-xs) 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: opacity var(--transition-base),
                visibility var(--transition-base),
                transform var(--transition-base);
    z-index: 1001;
    list-style: none;
  }

  .nav-dropdown:hover .nav-dropdown-menu,
  .nav-dropdown:focus-within .nav-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-dropdown:hover .nav-dropdown-toggle::after {
    transform: rotate(180deg);
  }

  .nav-dropdown-menu a,
  .nav-dropdown-menu span {
    display: block;
    padding: 0.5rem 1rem;
    font-size: var(--text-sm);
  }

  .nav-dropdown-menu a.active {
    color: var(--color-accent);
  }

  .nav-overlay {
    display: none;
  }

  .hero {
    padding: var(--space-3xl) 0 var(--space-2xl);
  }

  .card-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .card-grid--2 {
    grid-template-columns: repeat(2, 1fr);
  }

  .section__body {
    padding-inline: 0;
  }

  .module-nav__title {
    font-size: var(--text-lg);
  }
}


/* ============================================================
   24. Responsive: Wide Desktop (≥ 1200px)
   ============================================================ */
@media (min-width: 1200px) {
  :root {
    --text-3xl: 3rem;
  }
}


/* ============================================================
   25. Print Styles
   ============================================================ */
@media print {
  .site-nav,
  .nav-overlay,
  .module-nav,
  .progress-bar,
  .progress-dots,
  .site-footer {
    display: none;
  }

  body {
    background: #fff;
    color: #000;
    font-size: 11pt;
  }

  .hero {
    background: none;
    border-bottom: 1px solid #ccc;
  }

  a {
    color: inherit;
    text-decoration: underline;
  }

  .card,
  .callout,
  .calculator {
    break-inside: avoid;
  }
}

/* ----------------------------------------------------------
   Additional Component Styles
   ---------------------------------------------------------- */

/* Nav inner container */
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  max-width: 72rem;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

@media (min-width: 900px) {
  .nav-inner {
    gap: var(--space-md);
  }
}

/* Section intro text */
.section-intro {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
}

/* Module navigation (prev/next) */
.module-nav {
  border-top: 1px solid var(--color-border-light);
  padding: var(--space-xl) 0;
  margin-top: var(--space-xl);
}

.module-nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-md);
}

.module-nav-prev,
.module-nav-next,
.module-nav__link {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xs);
  text-decoration: none;
  color: var(--color-text);
  transition: color var(--transition-fast);
  max-width: 45%;
}

.module-nav-prev:hover,
.module-nav-next:hover {
  color: var(--color-accent);
}

.module-nav-next {
  text-align: right;
  margin-left: auto;
}

.module-nav-direction,
.module-nav__direction {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
}

.module-nav-title,
.module-nav__title {
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
}

.module-nav-link {
  text-decoration: none;
  color: var(--color-text);
}

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

/* Calculator cards */
.calculator-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--border-radius-lg);
  padding: var(--space-lg);
  margin-top: var(--space-md);
}

.calc-field {
  margin-bottom: var(--space-md);
}

.calc-field label,
.calc-field legend {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}

.calc-field input[type="number"],
.calc-field input[type="text"],
.calc-field select {
  width: 100%;
  max-width: 20rem;
  padding: 0.6rem 0.8rem;
  font-size: var(--text-base);
  font-family: var(--font-body);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color var(--transition-fast);
}

.calc-field input:focus,
.calc-field select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-light);
}

.calc-field fieldset {
  border: none;
  padding: 0;
  margin: 0;
}

.radio-label {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-xs) 0;
  cursor: pointer;
  font-size: var(--text-base);
}

.radio-label input[type="radio"] {
  accent-color: var(--color-accent);
  width: 1.1em;
  height: 1.1em;
}

.radio-label small {
  color: var(--color-text-light);
}

.calc-results {
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border-light);
}

.calc-results h3 {
  margin-bottom: var(--space-md);
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.result-item {
  text-align: center;
  padding: var(--space-md);
  background: var(--color-bg-alt);
  border-radius: var(--border-radius);
}

.result-value {
  display: block;
  font-size: var(--text-2xl);
  font-weight: var(--weight-bold);
  color: var(--color-accent);
  margin-bottom: var(--space-2xs);
}

.result-label {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.calc-note {
  font-size: var(--text-sm);
  color: var(--color-text-light);
  font-style: italic;
  margin-top: var(--space-sm);
}

/* Food reference grid */
.food-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(14rem, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.food-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--border-radius);
  padding: var(--space-md);
  text-align: center;
}

.food-name {
  display: block;
  font-weight: var(--weight-semibold);
  font-size: var(--text-base);
  margin-bottom: var(--space-2xs);
}

.food-serving {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-text-light);
  margin-bottom: var(--space-xs);
}

.food-protein {
  display: block;
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  color: var(--color-accent);
}

/* Resource grid */
.resource-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
  margin-top: var(--space-md);
}

@media (min-width: 600px) {
  .resource-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .resource-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.resource-grid .resource-card {
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--border-radius);
  padding: var(--space-md) var(--space-lg);
  text-decoration: none;
  color: var(--color-text);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.resource-grid .resource-card:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  transform: translateY(-2px);
}

.resource-grid .resource-card h3 {
  font-size: var(--text-base);
  margin-bottom: var(--space-2xs);
}

.resource-source {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
}

.resource-grid .resource-card p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin: 0;
}

/* Resource cards used in kickoff (app cards) */
.resource-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
  margin-top: var(--space-md);
}

@media (min-width: 600px) {
  .resource-cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

.resource-cards .resource-card {
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--border-radius);
  padding: var(--space-md) var(--space-lg);
  text-decoration: none;
  color: var(--color-text);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.resource-cards .resource-card:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  transform: translateY(-2px);
}

.resource-cards .resource-card h3 {
  font-size: var(--text-base);
  margin-bottom: var(--space-2xs);
}

.resource-cards .resource-card p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin: 0;
}

/* Task card */
.task-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-left: 4px solid var(--color-sage);
  border-radius: var(--border-radius-lg);
  padding: var(--space-lg);
  margin-top: var(--space-md);
}

.task-card p {
  margin-bottom: var(--space-sm);
}

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

/* Pull quote / blockquote */
.pull-quote {
  border-left: 4px solid var(--color-accent);
  padding: var(--space-md) var(--space-lg);
  margin: var(--space-xl) 0;
  font-size: var(--text-lg);
  font-style: italic;
  color: var(--color-text-secondary);
  background: var(--color-accent-light);
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.pull-quote p {
  margin: 0;
}

/* Highlight text */
.highlight-text {
  color: var(--color-accent);
  font-weight: var(--weight-semibold);
}

/* Progress indicator (alternative to progress-bar spans) */
.progress-indicator {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: var(--space-sm) 0;
}

.progress-label {
  font-size: var(--text-xs);
  color: var(--color-text-light);
  text-align: center;
  margin-bottom: var(--space-xs);
}

/* Progress fill bar variant */
.progress-fill {
  height: 5px;
  background: var(--color-accent);
  border-radius: 3px;
  transition: width var(--transition-base);
}

/* CTA section */
.cta-section {
  background: var(--color-bg-alt);
}

.cta-container {
  text-align: left;
}

/* Tips list styling for week 2 */
.tips-list {
  list-style: none;
  padding: 0;
  display: grid;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.tips-list li {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--border-radius);
  padding: var(--space-md);
  font-size: var(--text-base);
  position: relative;
  padding-left: var(--space-xl);
}

.tips-list li::before {
  content: "";
  position: absolute;
  left: var(--space-md);
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-sage);
}

/* Reflection section callout */
.reflection-card {
  background: var(--color-sage-light);
  border: 1px solid rgba(107, 124, 94, 0.2);
  border-left: 4px solid var(--color-sage);
  border-radius: var(--border-radius-lg);
  padding: var(--space-lg);
  margin-top: var(--space-md);
}

/* Badge for coming soon */
.badge-coming-soon {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-light);
  background: var(--color-bg-muted);
  padding: 0.15em 0.6em;
  border-radius: 999px;
}

/* Section-specific wrappers (semantic, no special styling needed beyond section) */
.lesson-section,
.why-it-matters-section,
.task-section,
.resources-section,
.calculator-section,
.food-reference-section,
.course-overview,
.how-it-works,
.module-roadmap {
  /* Inherit from .section */
}