/* Mathory — main stylesheet
 * Clean, professional, 6th–12th grade math focused. Two-color system.
 */

:root {
  --color-primary: #0f2e4a;
  --color-primary-hover: #1a4066;
  --color-accent: #c8963e;
  --color-accent-hover: #a87b28;
  --color-bg: #fbfaf7;
  --color-surface: #ffffff;
  --color-text: #1a1a1a;
  --color-text-muted: #555555;
  --color-border: #e4e0d7;
  --color-highlight: #f4efe4;

  --font-serif: "Georgia", "Times New Roman", serif;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;

  --container-narrow: 720px;
  --container: 1080px;
  --container-wide: 1200px;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
  --space-7: 4rem;
  --space-8: 6rem;

  --radius: 4px;
  --shadow: 0 1px 3px rgba(15, 46, 74, 0.06), 0 4px 12px rgba(15, 46, 74, 0.04);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  color: var(--color-primary);
  line-height: 1.2;
  margin-top: 0;
}

h1 { font-size: 2.75rem; margin-bottom: var(--space-4); }
h2 { font-size: 2rem; margin-bottom: var(--space-3); }
h3 { font-size: 1.35rem; margin-bottom: var(--space-2); }
h4 { font-size: 1.1rem; margin-bottom: var(--space-2); font-family: var(--font-sans); font-weight: 600; letter-spacing: 0.03em; text-transform: uppercase; }

p {
  margin: 0 0 var(--space-3) 0;
}

a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

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

/* Nav */
.nav {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  max-width: var(--container-wide);
  margin: 0 auto;
}

.nav-brand {
  font-family: 'Nunito Sans', sans-serif;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary);
  text-decoration: none;
  letter-spacing: -0.03em;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  gap: 1px;
}

.nav-brand-mark {
  height: 1.5rem;
  width: 1.5rem;
  display: block;
  flex-shrink: 0;
}


.nav-links {
  display: flex;
  gap: var(--space-4);
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
}

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

.nav-links .btn {
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
}

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

.nav-dropdown-toggle {
  background: none;
  border: none;
  padding: 0;
  margin: 0;
  color: var(--color-text);
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 500;
  line-height: inherit;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.nav-dropdown-toggle:hover,
.nav-dropdown-toggle:focus {
  color: var(--color-primary);
  outline: none;
}

.nav-caret {
  font-size: 0.7rem;
  line-height: 1;
  transition: transform 0.15s ease;
}

.nav-dropdown:hover .nav-caret,
.nav-dropdown:focus-within .nav-caret {
  transform: translateY(2px);
}

.nav-dropdown-menu {
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 0;
  min-width: 240px;
  margin: 0;
  padding: 0.4rem 0;
  list-style: none;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity 0.15s ease, transform 0.15s ease, visibility 0.15s ease;
  z-index: 200;
}

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

.nav-dropdown-menu li {
  margin: 0;
}

.nav-dropdown-menu a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.55rem 1rem;
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  white-space: nowrap;
}

.nav-dropdown-menu a:hover,
.nav-dropdown-menu a:focus {
  background: var(--color-highlight);
  color: var(--color-primary);
  outline: none;
}

.nav-dropdown-arrow {
  color: var(--color-accent);
  font-weight: 700;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.85rem 1.6rem;
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background 0.15s, transform 0.05s;
  font-size: 1rem;
  letter-spacing: 0.01em;
}

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

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

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
  padding: calc(0.85rem - 2px) calc(1.6rem - 2px);
}

.btn-secondary:hover {
  background: var(--color-primary);
  color: white;
}

.btn:active {
  transform: translateY(1px);
}

/* Hero */
.hero {
  padding: var(--space-8) 0 var(--space-7);
  background: linear-gradient(180deg, var(--color-highlight) 0%, var(--color-bg) 100%);
}

.hero-inner {
  max-width: var(--container-narrow);
  margin: 0 auto;
  text-align: center;
  padding: 0 var(--space-4);
}

.hero-eyebrow {
  color: var(--color-accent);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-size: 0.8rem;
  margin-bottom: var(--space-3);
}

.hero h1 {
  font-size: 3.25rem;
  margin-bottom: var(--space-3);
  letter-spacing: -0.02em;
}

.hero p.lead {
  font-size: 1.25rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
  line-height: 1.5;
}

.hero-cta {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-4);
}

.hero-trust {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.hero-trust strong {
  color: var(--color-accent);
}

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

.section-tight {
  padding: var(--space-6) 0;
}

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

.section-dark {
  background: var(--color-primary);
  color: white;
}

.section-dark h1, .section-dark h2, .section-dark h3 {
  color: white;
}

.section-heading {
  text-align: center;
  margin-bottom: var(--space-6);
}

.section-heading h2 {
  margin-bottom: var(--space-2);
}

.section-heading p {
  color: var(--color-text-muted);
  font-size: 1.1rem;
  max-width: 620px;
  margin: 0 auto;
}

/* Cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-4);
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-5);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
}

.card h3 {
  margin-bottom: var(--space-2);
}

.card p {
  color: var(--color-text-muted);
  flex-grow: 1;
}

.card-price {
  font-size: 1.75rem;
  font-family: var(--font-serif);
  color: var(--color-primary);
  font-weight: bold;
  margin: var(--space-3) 0 var(--space-2);
}

.card-price small {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  font-weight: normal;
  font-family: var(--font-sans);
}

.card-tag {
  display: inline-block;
  background: var(--color-highlight);
  color: var(--color-primary);
  padding: 0.25rem 0.6rem;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2);
}

.card ul {
  padding-left: var(--space-4);
  color: var(--color-text-muted);
  margin: var(--space-2) 0 var(--space-3) 0;
}

.card ul li {
  margin-bottom: var(--space-1);
}

.card .btn {
  margin-top: var(--space-3);
  align-self: flex-start;
}

/* Segment route */
.segment-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-5);
}

.segment-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-6);
  text-align: left;
  box-shadow: var(--shadow);
  transition: transform 0.15s, box-shadow 0.15s;
}

.segment-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(15, 46, 74, 0.1);
}

.segment-card .card-tag {
  margin-bottom: var(--space-3);
}

.segment-card h3 {
  font-size: 1.75rem;
  margin-bottom: var(--space-3);
}

.segment-card ul {
  list-style: none;
  padding: 0;
  margin: var(--space-3) 0;
  color: var(--color-text-muted);
}

.segment-card ul li {
  padding: 0.35rem 0;
  padding-left: var(--space-4);
  position: relative;
}

.segment-card ul li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: bold;
}

/* Trap block */
.trap-block {
  background: var(--color-primary);
  color: white;
  padding: var(--space-7) 0;
  text-align: center;
}

.trap-block h2 {
  color: white;
  font-size: 2.5rem;
  max-width: 720px;
  margin: 0 auto var(--space-3);
}

.trap-block p {
  color: rgba(255, 255, 255, 0.85);
  max-width: 640px;
  margin: 0 auto var(--space-3);
  font-size: 1.1rem;
}

.trap-stats {
  display: flex;
  justify-content: center;
  gap: var(--space-6);
  margin-top: var(--space-5);
  flex-wrap: wrap;
}

.trap-stat {
  text-align: center;
}

.trap-stat-num {
  font-family: var(--font-serif);
  font-size: 3rem;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: var(--space-1);
}

.trap-stat-label {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.75);
  max-width: 200px;
}

/* How it works */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-5);
  counter-reset: step;
}

.step {
  position: relative;
  padding-top: var(--space-6);
}

.step::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  position: absolute;
  top: 0;
  left: 0;
  font-family: var(--font-serif);
  font-size: 2.5rem;
  color: var(--color-accent);
  line-height: 1;
}

.step h3 {
  font-size: 1.2rem;
  margin-bottom: var(--space-2);
}

.step p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* Testimonials */
.testimonial {
  background: var(--color-surface);
  border-left: 4px solid var(--color-accent);
  padding: var(--space-5);
  margin: var(--space-4) 0;
  border-radius: 0 var(--radius) var(--radius) 0;
  box-shadow: var(--shadow);
}

.testimonial-quote {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-style: italic;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
  line-height: 1.5;
}

.testimonial-author {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.testimonial-author strong {
  color: var(--color-text);
}

/* FAQ */
.faq details {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-3) var(--space-4);
  margin-bottom: var(--space-3);
  background: var(--color-surface);
}

.faq summary {
  font-weight: 600;
  cursor: pointer;
  color: var(--color-primary);
  font-size: 1.05rem;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.faq summary::after {
  content: "+";
  color: var(--color-accent);
  font-size: 1.5rem;
  font-weight: normal;
}

.faq details[open] summary::after {
  content: "−";
}

.faq details[open] {
  padding-bottom: var(--space-4);
}

.faq details p {
  margin-top: var(--space-3);
  margin-bottom: 0;
  color: var(--color-text-muted);
}

/* Footer */
.footer {
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.8);
  padding: var(--space-6) 0 var(--space-4);
  margin-top: var(--space-7);
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-5);
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.footer h4 {
  color: white;
  font-size: 0.9rem;
  margin-bottom: var(--space-3);
}

.footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer li {
  margin-bottom: var(--space-2);
}

.footer a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  font-size: 0.95rem;
}

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

.footer-brand {
  font-family: 'Nunito Sans', sans-serif;
  font-size: 1.5rem;
  font-weight: 800;
  color: white;
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: var(--space-2);
  display: inline-flex;
  align-items: center;
  gap: 1px;
}

.footer-brand-mark {
  height: 1.5rem;
  width: 1.5rem;
  display: block;
  flex-shrink: 0;
}

.footer-tagline {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
  max-width: 320px;
  margin-bottom: var(--space-3);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: var(--space-5);
  padding-top: var(--space-3);
  text-align: center;
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.85rem;
}

.footer-maker {
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.95rem;
  margin: 0 0 var(--space-2) 0;
}

.footer-maker a {
  color: rgba(255, 255, 255, 0.95);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

.footer-copy {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.8rem;
  margin: 0;
}

/* Legal entity block (Contact page) */
.legal-entity {
  font-style: normal;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-top: var(--space-4);
  padding: var(--space-3) var(--space-4);
  background: var(--color-highlight);
  border-radius: var(--radius);
}

/* Sibling products list (About page) */
.sibling-products {
  list-style: none;
  padding: 0;
  margin: var(--space-3) 0 0 0;
}

.sibling-products li {
  margin-bottom: var(--space-2);
  color: var(--color-text-muted);
}

.sibling-products li a {
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
}

.sibling-products li a:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

/* Pricing page */
.pricing-hero {
  padding: var(--space-6) 0 var(--space-5);
  text-align: center;
}

.pricing-hero h1 {
  font-size: 2.75rem;
}

.pricing-hero p {
  color: var(--color-text-muted);
  font-size: 1.15rem;
  max-width: 640px;
  margin: 0 auto var(--space-3);
}

.pricing-group {
  margin-bottom: var(--space-6);
}

.pricing-group-heading {
  text-align: center;
  margin-bottom: var(--space-5);
}

.pricing-group-heading h2 {
  font-size: 1.75rem;
}

.pricing-group-heading .card-tag {
  margin-bottom: var(--space-2);
}

.diagnostic-highlight {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-hover) 100%);
  color: white;
  padding: var(--space-6);
  border-radius: var(--radius);
  margin-bottom: var(--space-6);
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-5);
  align-items: center;
}

.diagnostic-highlight h2 {
  color: white;
  margin-bottom: var(--space-2);
}

.diagnostic-highlight p {
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--space-3);
}

.diagnostic-highlight .price-block {
  text-align: center;
}

.diagnostic-highlight .price-block .price {
  font-family: var(--font-serif);
  font-size: 3.5rem;
  color: var(--color-accent);
  line-height: 1;
}

.diagnostic-highlight .price-block .btn {
  margin-top: var(--space-3);
}

/* Blog */
.blog-list {
  display: grid;
  gap: var(--space-5);
}

.blog-list-item {
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-border);
}

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

.blog-list-item .blog-date {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  margin-bottom: var(--space-1);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.blog-list-item h3 {
  font-size: 1.5rem;
  margin-bottom: var(--space-2);
}

.blog-list-item h3 a {
  text-decoration: none;
  color: var(--color-primary);
}

.blog-list-item h3 a:hover {
  color: var(--color-accent);
}

.blog-list-item .excerpt {
  color: var(--color-text-muted);
}

/* Blog post */
.post-hero {
  padding: var(--space-6) 0 var(--space-5);
  background: var(--color-highlight);
}

.post-hero .container {
  max-width: 780px;
}

.post-meta {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-2);
}

.post-hero h1 {
  font-size: 2.5rem;
  margin-bottom: var(--space-3);
  letter-spacing: -0.01em;
}

.post-body {
  padding: var(--space-6) 0;
}

.post-body .container {
  max-width: 720px;
}

.post-body h2 {
  font-size: 1.75rem;
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
}

.post-body h3 {
  font-size: 1.25rem;
  margin-top: var(--space-5);
  margin-bottom: var(--space-2);
}

.post-body p {
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: var(--space-3);
}

.post-body ul, .post-body ol {
  font-size: 1.05rem;
  line-height: 1.7;
  padding-left: var(--space-5);
  margin-bottom: var(--space-3);
}

.post-body li {
  margin-bottom: var(--space-2);
}

.post-body strong {
  color: var(--color-primary);
}

.post-cta {
  background: var(--color-highlight);
  padding: var(--space-5);
  border-radius: var(--radius);
  margin: var(--space-5) 0;
  text-align: center;
}

.post-cta h3 {
  margin-top: 0;
  margin-bottom: var(--space-2);
}

.post-cta p {
  margin-bottom: var(--space-3);
}

/* Book page */
.book-hero {
  padding: var(--space-6) 0;
  text-align: center;
}

.book-hero .container {
  max-width: 720px;
}

.book-hero h1 {
  font-size: 2.75rem;
}

.book-includes {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-5);
  margin: var(--space-5) 0;
  text-align: left;
}

.book-includes h3 {
  margin-bottom: var(--space-3);
}

.book-includes ul {
  padding-left: var(--space-4);
  color: var(--color-text-muted);
}

.book-includes li {
  margin-bottom: var(--space-2);
}

.calendly-placeholder {
  background: var(--color-highlight);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-7);
  text-align: center;
  margin: var(--space-5) 0;
}

.calendly-placeholder p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* About */
.about-hero {
  padding: var(--space-6) 0;
}

.about-body p {
  font-size: 1.1rem;
  line-height: 1.7;
  margin-bottom: var(--space-4);
}

/* Contact form */
.contact-form {
  display: grid;
  gap: var(--space-3);
  max-width: 520px;
  margin: 0 auto;
}

.contact-form label {
  font-weight: 600;
  color: var(--color-primary);
  font-size: 0.95rem;
}

.contact-form input, .contact-form select, .contact-form textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 1rem;
  background: var(--color-surface);
}

.contact-form textarea {
  min-height: 140px;
  resize: vertical;
}

.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus {
  outline: 2px solid var(--color-accent);
  border-color: var(--color-accent);
}

/* Results / case studies */
.case-study {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-5);
  margin-bottom: var(--space-4);
  box-shadow: var(--shadow);
}

.case-study-meta {
  display: flex;
  gap: var(--space-4);
  margin: var(--space-3) 0;
  flex-wrap: wrap;
}

.case-study-stat {
  display: flex;
  flex-direction: column;
}

.case-study-stat .stat-num {
  font-family: var(--font-serif);
  font-size: 2rem;
  color: var(--color-accent);
  line-height: 1;
}

.case-study-stat .stat-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

.case-study h3 {
  margin-bottom: var(--space-2);
}

/* ── Homepage "Three tracks" grid ──────────────────────────────────────────
   Desktop shows 3 columns of equal width; mobile stacks single-column so each
   card is readable at phone widths (repeat(3, minmax(0, 1fr)) at 375px gives
   ~120px per card, unusable). Class replaces inline style so mobile media
   query below can override it.                                              */
.tracks-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2rem;
  align-items: stretch;
}

/* Responsive */
@media (max-width: 720px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.6rem; }
  .hero { padding: var(--space-6) 0 var(--space-5); }
  .hero h1 { font-size: 2.25rem; }
  .hero p.lead { font-size: 1.1rem; }
  .section { padding: var(--space-6) 0; }

  /* Nav: wrap onto multiple rows on mobile instead of hiding non-btn links
     (previously `display: none` left mobile users with no way to reach
     How It Works / All Programs / Blog). */
  .nav-inner {
    flex-wrap: wrap;
    row-gap: var(--space-2);
  }
  .nav-links {
    flex-wrap: wrap;
    gap: var(--space-3);
    justify-content: flex-end;
    width: auto;
  }
  .nav-links a:not(.btn) {
    font-size: 0.88rem;
  }

  /* Nav dropdowns: on mobile the fixed-width absolute menu can slip off-screen.
     Anchor the panel to the nav row instead of the toggle, and let it span the
     available width. */
  .nav-dropdown-toggle {
    font-size: 0.88rem;
  }
  .nav-dropdown-menu {
    right: 0;
    left: auto;
    min-width: 220px;
    max-width: calc(100vw - var(--space-4) * 2);
  }

  /* Three-tracks: stack full-width on mobile. */
  .tracks-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .diagnostic-highlight { grid-template-columns: 1fr; text-align: center; }
  .footer-inner { grid-template-columns: 1fr; }
  .trap-stats { gap: var(--space-4); }
  .trap-stat-num { font-size: 2.25rem; }
}

/* Utility */
.text-center { text-align: center; }
.mt-5 { margin-top: var(--space-5); }
.mb-5 { margin-bottom: var(--space-5); }