/* ==========================================================================
   AskKids CSS Design System
   ========================================================================== */

/* Design Tokens & Custom Properties */
:root {
  /* Harmonious Color Palette */
  --color-primary: #ebdcc4;        /* Soft Sand Beige */
  --color-primary-dark: #dccdb5;   /* Darker Sand Beige */
  --color-text: #093149;           /* Rich Navy Blue */
  --color-link-hover: #6796bf;     /* Soft Sky Blue */
  --color-accent-blue: #6796bf;    /* Accent Sky Blue */
  --color-bg-card: rgba(253, 249, 244, 0.94); /* Warm Frosted Ivory */
  --color-bg-body-overlay: rgba(253, 249, 244, 0.6); /* Soft body tint */
  --color-border: rgba(235, 220, 196, 0.6); /* Soft beige border */
  --color-white: #ffffff;
  --color-success: #2e7d32;
  --color-error: #c62828;

  /* Typography */
  --font-heading: 'Fredoka', 'Nunito', sans-serif;
  --font-body: 'Nunito', sans-serif;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2.25rem;
  --spacing-xl: 3.5rem;
  
  /* Layout */
  --container-max-width: 1200px;
  --border-radius-sm: 8px;
  --border-radius-md: 16px;
  --border-radius-lg: 24px;
  --box-shadow-sm: 0 4px 12px rgba(9, 49, 73, 0.05);
  --box-shadow-md: 0 8px 24px rgba(9, 49, 73, 0.08);
  --box-shadow-lg: 0 16px 40px rgba(9, 49, 73, 0.12);
  --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  height: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100%;
  position: relative;
  overflow-x: hidden;
  background-color: #fdfbf7;
}

/* Background image & overlay */
body.custom-background {
  background-image: url("images/background.jpg");
  background-position: center top;
  background-size: cover;
  background-repeat: no-repeat;
  background-attachment: fixed;
}

body.custom-background::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--color-bg-body-overlay);
  z-index: -1;
  pointer-events: none;
}

/* Typography elements */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.3;
}

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

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

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

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-md);
  padding-right: var(--spacing-md);
}

.text-center { text-align: center; }
.margin-top-sm { margin-top: var(--spacing-sm); }
.margin-top-md { margin-top: var(--spacing-md); }
.margin-top-lg { margin-top: var(--spacing-lg); }
.margin-top-xl { margin-top: var(--spacing-xl); }

.font-sm { font-size: 0.9rem; }
.font-md { font-size: 1.05rem; }
.font-lg { font-size: 1.15rem; }

.hidden { display: none !important; }

/* Global Card Styling with Glassmorphism */
.card {
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-lg);
  margin-bottom: var(--spacing-lg);
  transition: var(--transition-smooth);
}

.glass-card {
  background: var(--color-bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.4);
  box-shadow: var(--box-shadow-md);
}

.glass-card:hover {
  box-shadow: var(--box-shadow-lg);
}

/* Custom Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 1.05rem;
  border-radius: 50px;
  border: 2px solid transparent;
  cursor: pointer;
  text-align: center;
  transition: var(--transition-smooth);
  box-shadow: var(--box-shadow-sm);
}

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

.btn-primary:hover {
  background-color: var(--color-accent-blue);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: var(--box-shadow-md);
}

.btn-secondary {
  background-color: var(--color-primary);
  color: var(--color-text);
  border-color: var(--color-primary-dark);
}

.btn-secondary:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--box-shadow-md);
}

.btn-block {
  display: block;
  width: 100%;
}

/* Sticky Header Layout */
.site-header {
  position: sticky;
  top: 0;
  background-color: var(--color-primary);
  box-shadow: var(--box-shadow-sm);
  z-index: 1000;
  transition: var(--transition-smooth);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-sm);
  padding-bottom: var(--spacing-sm);
  height: 100px;
}

.site-branding {
  display: flex;
  align-items: center;
}

.logo-link {
  display: inline-block;
}

.site-logo {
  height: 80px;
  width: auto;
  transition: var(--transition-smooth);
}

.site-logo:hover {
  transform: scale(1.05);
}

/* Desktop Menu Navigation */
.main-navigation {
  margin-right: auto;
  margin-left: 3.5rem;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-md);
}

.nav-link {
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 1.1rem;
  padding: 0.5rem 0.75rem;
  position: relative;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 3px;
  background-color: var(--color-text);
  transition: var(--transition-smooth);
  transform: translateX(-50%);
  border-radius: 2px;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 80%;
}

.nav-link.active {
  font-weight: 600;
}

/* Mobile Hamburger Toggle Button */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 30px;
  height: 21px;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: 1001;
}

.hamburger-bar {
  width: 100%;
  height: 3px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: var(--transition-smooth);
}

/* Hamburger transition to 'X' */
.menu-toggle[aria-expanded="true"] .hamburger-bar:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] .hamburger-bar:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"] .hamburger-bar:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

/* Mobile Menu Drawer Overlay */
.mobile-nav-drawer {
  position: fixed;
  top: 100px;
  left: 0;
  width: 100%;
  height: calc(100vh - 100px);
  background-color: var(--color-primary);
  z-index: 999;
  display: flex;
  justify-content: center;
  align-items: center;
  transform: translateY(-100%);
  opacity: 0;
  transition: transform 0.4s cubic-bezier(0.25, 1, 0.5, 1), opacity 0.3s ease;
  pointer-events: none;
}

.mobile-nav-drawer.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.mobile-nav-menu {
  list-style: none;
  text-align: center;
}

.mobile-nav-menu li {
  margin-bottom: var(--spacing-md);
}

.mobile-nav-link {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 500;
  display: block;
  padding: var(--spacing-sm);
}

/* Page Section Animations (SPA) */
.page-section {
  display: none;
  opacity: 0;
  transform: translateY(15px);
  transition: opacity 0.4s ease-out, transform 0.4s ease-out;
  padding-top: var(--spacing-xl);
  padding-bottom: var(--spacing-xl);
}

.page-section.active-section {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

/* Titles */
.section-title {
  font-size: 2.25rem;
  margin-bottom: var(--spacing-lg);
  position: relative;
  padding-bottom: var(--spacing-sm);
  display: inline-block;
}

.section-title::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 4px;
  background-color: var(--color-accent-blue);
  border-radius: 2px;
}

.section-title.text-center::after {
  left: 50%;
  transform: translateX(-50%);
}

.subtitle {
  font-size: 1.6rem;
  margin-bottom: var(--spacing-md);
}

/* Section-Specific: Home */
.welcome-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--spacing-lg);
  align-items: center;
}

.welcome-text p {
  margin-bottom: var(--spacing-sm);
}

.cta-banner {
  background: var(--color-primary);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-md);
  text-align: center;
  border: 1px solid var(--color-primary-dark);
}

.cta-banner h3 {
  margin-bottom: var(--spacing-sm);
}

.cta-banner p {
  margin-bottom: var(--spacing-md);
  font-size: 0.95rem;
}

/* Section-Specific: Kindercoaching */
.issues-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.issue-item {
  background: var(--color-white);
  padding: var(--spacing-md);
  border-radius: var(--border-radius-md);
  text-align: center;
  box-shadow: var(--box-shadow-sm);
  border: 1px solid rgba(235, 220, 196, 0.3);
  transition: var(--transition-smooth);
}

.issue-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--box-shadow-md);
  border-color: var(--color-primary-dark);
}

.issue-icon {
  font-size: 2.25rem;
  margin-bottom: var(--spacing-xs);
  display: block;
}

.issue-item h4 {
  font-size: 1.1rem;
}

.school-collab p {
  margin-bottom: var(--spacing-sm);
}

.highlight-quote {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  color: var(--color-text);
  border-left: 4px solid var(--color-accent-blue);
  padding-left: var(--spacing-md);
  margin: var(--spacing-lg) 0;
  font-style: italic;
}

/* Timeline Components */
.timeline {
  position: relative;
  max-width: 800px;
  margin: var(--spacing-xl) auto 0;
  padding: 0 0 0 40px;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 0;
  left: 19px;
  height: 100%;
  width: 4px;
  background-color: var(--color-primary);
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  margin-bottom: var(--spacing-lg);
}

.timeline-number {
  position: absolute;
  left: -40px;
  top: 0;
  width: 40px;
  height: 40px;
  background-color: var(--color-text);
  color: var(--color-white);
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: bold;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: var(--box-shadow-sm);
  border: 3px solid var(--color-primary);
  z-index: 10;
  transition: var(--transition-smooth);
}

.timeline-item:hover .timeline-number {
  background-color: var(--color-accent-blue);
  transform: scale(1.1);
}

.timeline-content {
  background: var(--color-white);
  padding: var(--spacing-md);
  border-radius: var(--border-radius-md);
  box-shadow: var(--box-shadow-sm);
  border: 1px solid rgba(0,0,0,0.02);
  transition: var(--transition-smooth);
}

.timeline-content:hover {
  transform: translateX(5px);
  box-shadow: var(--box-shadow-md);
}

.timeline-content h3 {
  font-size: 1.2rem;
  margin-bottom: var(--spacing-xs);
}

/* Section-Specific: Rots en Water */
.rots-water-header-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--spacing-lg);
  align-items: center;
}

.rots-water-logo-container {
  text-align: center;
  background-color: var(--color-white);
  padding: var(--spacing-md);
  border-radius: var(--border-radius-md);
  box-shadow: var(--box-shadow-sm);
}

.rots-water-logo {
  max-width: 100%;
  height: auto;
  margin: 0 auto var(--spacing-sm);
  border-radius: var(--border-radius-sm);
}

.badge {
  display: inline-block;
  padding: 0.35rem 0.75rem;
  background-color: var(--color-primary);
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.85rem;
}

.skills-block {
  background: var(--color-white);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-md);
  box-shadow: var(--box-shadow-sm);
}

.skills-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--spacing-md);
  list-style: none;
  margin-top: var(--spacing-md);
}

.skills-list li {
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.skills-list li span {
  font-size: 1.5rem;
}

.concepts-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
}

.concept-card {
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-md);
  box-shadow: var(--box-shadow-sm);
  transition: var(--transition-smooth);
}

.concept-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--box-shadow-md);
}

.rots-card {
  background-color: rgba(9, 49, 73, 0.04);
  border-left: 6px solid var(--color-text);
}

.water-card {
  background-color: rgba(103, 150, 191, 0.07);
  border-left: 6px solid var(--color-accent-blue);
}

.concept-header {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

/* Section-Specific: Ouders */
.focus-areas-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
}

.focus-area-card {
  background: var(--color-white);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-md);
  box-shadow: var(--box-shadow-sm);
  text-align: center;
  border-top: 4px solid var(--color-primary-dark);
  transition: var(--transition-smooth);
}

.focus-area-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--box-shadow-md);
  border-top-color: var(--color-accent-blue);
}

.focus-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-sm);
  display: block;
}

.highlight-box {
  background-color: var(--color-primary);
  padding: var(--spacing-md);
  border-radius: var(--border-radius-md);
  margin: var(--spacing-lg) auto 0;
  max-width: 800px;
  font-weight: 500;
}

/* Section-Specific: Over Kim */
.bio-grid {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: var(--spacing-lg);
  align-items: flex-start;
}

.bio-image-container {
  background-color: var(--color-white);
  padding: var(--spacing-sm);
  border-radius: var(--border-radius-md);
  box-shadow: var(--box-shadow-sm);
}

.bio-image {
  border-radius: var(--border-radius-sm);
  width: 100%;
  height: auto;
}

.roosevelt-quote {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  text-align: center;
  padding: var(--spacing-lg);
  background-color: var(--color-primary);
  border-radius: var(--border-radius-md);
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  border: 1px solid var(--color-primary-dark);
}

.roosevelt-quote cite {
  display: block;
  font-size: 1rem;
  font-family: var(--font-body);
  margin-top: var(--spacing-sm);
  font-style: normal;
  color: var(--color-accent-blue);
  font-weight: bold;
}

/* Section-Specific: Tarieven */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
  margin-top: var(--spacing-md);
}

.pricing-card {
  background-color: var(--color-white);
  border-radius: var(--border-radius-md);
  box-shadow: var(--box-shadow-sm);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  border: 1px solid rgba(0,0,0,0.03);
  transition: var(--transition-smooth);
}

.pricing-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--box-shadow-lg);
}

.featured-price {
  border: 2px solid var(--color-accent-blue);
  transform: scale(1.03);
}

.featured-price:hover {
  transform: translateY(-8px) scale(1.03);
}

.price-header {
  padding: var(--spacing-lg) var(--spacing-md);
  text-align: center;
  background-color: rgba(9, 49, 73, 0.02);
  border-bottom: 1px solid rgba(0,0,0,0.05);
}

.featured-price .price-header {
  background-color: rgba(103, 150, 191, 0.08);
}

.price-header h3 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
}

.price-amount {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  font-weight: bold;
  color: var(--color-text);
}

.price-meta {
  font-size: 0.85rem;
  font-style: italic;
  opacity: 0.8;
}

.price-body {
  padding: var(--spacing-lg);
  flex-grow: 1;
}

.price-features {
  list-style: none;
}

.price-features li {
  margin-bottom: var(--spacing-sm);
  padding-left: 25px;
  position: relative;
  font-size: 0.95rem;
}

.price-features li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-accent-blue);
  font-weight: bold;
}

.pricing-terms {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
}

.term-box {
  background-color: var(--color-white);
  padding: var(--spacing-md);
  border-radius: var(--border-radius-md);
  box-shadow: var(--box-shadow-sm);
  border-left: 4px solid var(--color-primary-dark);
}

.term-box h4 {
  margin-bottom: var(--spacing-xs);
}

/* Section-Specific: Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 1.8fr;
  gap: var(--spacing-lg);
}

.contact-info-panel {
  background: var(--color-white);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-md);
  box-shadow: var(--box-shadow-sm);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.info-logo-container {
  display: flex;
  justify-content: center;
  margin-bottom: var(--spacing-sm);
}

.contact-logo {
  height: 90px;
  width: auto;
}

.contact-detail-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.contact-detail-row .icon {
  font-size: 1.5rem;
}

.business-details {
  border-top: 1px solid rgba(0,0,0,0.08);
  padding-top: var(--spacing-md);
  margin-top: auto;
  opacity: 0.85;
}

.business-details p {
  margin-bottom: var(--spacing-xs);
}

.contact-form-panel {
  background: var(--color-white);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-md);
  box-shadow: var(--box-shadow-sm);
}

.contact-form-panel h3 {
  margin-bottom: var(--spacing-xs);
}

.modern-form {
  margin-top: var(--spacing-md);
}

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

.form-group label {
  display: block;
  font-family: var(--font-heading);
  margin-bottom: 0.35rem;
  font-weight: 500;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-body);
  font-size: 1rem;
  border: 2px solid var(--color-primary-dark);
  border-radius: var(--border-radius-sm);
  background-color: var(--color-white);
  color: var(--color-text);
  transition: var(--transition-smooth);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent-blue);
  box-shadow: 0 0 0 3px rgba(103, 150, 191, 0.15);
}

.form-status-alert {
  padding: var(--spacing-sm);
  border-radius: var(--border-radius-sm);
  margin-top: var(--spacing-md);
  font-weight: 500;
  text-align: center;
}

.form-status-alert.success {
  background-color: rgba(46, 125, 50, 0.1);
  color: var(--color-success);
  border: 1px solid var(--color-success);
}

.form-status-alert.error {
  background-color: rgba(198, 40, 40, 0.1);
  color: var(--color-error);
  border: 1px solid var(--color-error);
}

/* Section-Specific: Agenda */
.agenda-card {
  background-color: var(--color-white);
  border-radius: var(--border-radius-md);
  box-shadow: var(--box-shadow-sm);
  padding: var(--spacing-lg);
  border-left: 8px solid var(--color-accent-blue);
  max-width: 800px;
  margin: 0 auto;
  position: relative;
}

.agenda-card-badge {
  position: absolute;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  background-color: var(--color-accent-blue);
  color: var(--color-white);
  padding: 0.35rem 0.75rem;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: bold;
}

.agenda-card h2 {
  font-size: 1.75rem;
  margin-bottom: var(--spacing-xs);
  max-width: 80%;
}

.agenda-highlight {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  color: var(--color-accent-blue);
  margin-bottom: var(--spacing-lg);
  font-weight: bold;
}

.agenda-details {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.agenda-detail-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
}

.agenda-detail-item .icon {
  font-size: 1.5rem;
  line-height: 1.2;
}

/* Footer layout */
.site-footer {
  background-color: var(--color-accent-blue);
  color: var(--color-white);
  padding-top: var(--spacing-lg);
  padding-bottom: var(--spacing-lg);
  margin-top: var(--spacing-xl);
  border-top: 1px solid rgba(0,0,0,0.05);
}

.site-footer a {
  color: var(--color-white);
  text-decoration: underline;
}

.site-footer a:hover {
  opacity: 0.8;
}

.footer-inner p {
  margin-bottom: var(--spacing-xs);
}

.copyright {
  font-size: 0.95rem;
}

.credits {
  font-size: 0.85rem;
  opacity: 0.8;
}

/* ==========================================================================
   Responsive Media Queries
   ========================================================================== */

@media (max-width: 992px) {
  /* Tablet layout optimizations */
  .welcome-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .rots-water-header-grid {
    grid-template-columns: 1fr;
    justify-items: center;
    text-align: center;
  }

  .bio-grid {
    grid-template-columns: 1fr;
    justify-items: center;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 450px;
    margin-left: auto;
    margin-right: auto;
  }

  .featured-price {
    transform: scale(1);
    order: -1; /* Display primary package at top on small screens */
  }

  .featured-price:hover {
    transform: translateY(-8px) scale(1);
  }

  .pricing-terms {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .focus-areas-container {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  /* Mobile screen layout optimizations */
  .main-navigation {
    display: none; /* Hide desktop navigation links */
  }

  .menu-toggle {
    display: flex; /* Show hamburger button */
  }

  .site-header {
    position: fixed;
    width: 100%;
    top: 0;
  }

  body {
    padding-top: 100px; /* Offset fixed header space */
  }

  .section-title {
    font-size: 1.8rem;
  }

  .subtitle {
    font-size: 1.4rem;
  }

  .timeline {
    padding-left: 30px;
  }

  .timeline::before {
    left: 14px;
  }

  .timeline-number {
    width: 32px;
    height: 32px;
    font-size: 1.05rem;
    left: -30px;
    top: 4px;
  }

  .agenda-card h2 {
    max-width: 100%;
  }

  .agenda-card-badge {
    position: static;
    margin-bottom: var(--spacing-sm);
  }
}

@media (max-width: 576px) {
  .skills-list {
    grid-template-columns: 1fr;
  }

  .concepts-grid {
    grid-template-columns: 1fr;
  }

  .card {
    padding: var(--spacing-md);
  }
}