:root {
  --color-primary: #1d448a;
  --color-accent: #f2c035;
  --color-dark-bg: #1d2a35;
  --color-code-bg: #f1f1f1;
  --color-page-bg: #ffffff;
  --color-text: #111827;
  --color-text-muted: #4b5563;
  --color-border: #e5e7eb;
  --shadow-soft: 0 10px 15px rgba(15, 23, 42, 0.15);
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --focus-ring: 0 0 0 3px rgba(242, 192, 53, 0.7);
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-page-bg: #0b1621;
    --color-text: #f9fafb;
    --color-text-muted: #9ca3af;
    --color-border: #374151;
  }
}

body.theme-dark {
  --color-page-bg: #0b1621;
  --color-text: #f9fafb;
  --color-text-muted: #9ca3af;
  --color-border: #374151;
  --color-code-bg: #111827;
}

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

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background-color: var(--color-page-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-tap-highlight-color: rgba(242, 192, 53, 0.3);
}

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

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

a:hover,
a:focus-visible {
  text-decoration: underline;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0.75rem;
  padding: 0.5rem 1rem;
  background-color: var(--color-accent);
  color: #1f2933;
  z-index: 2000;
}

.skip-link:focus {
  left: 0.75rem;
}

.top-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--color-primary);
  color: #f9fafb;
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.5);
}

.top-nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.5rem 1rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.brand {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 0.6rem;
  line-height: 1;
  color: #f9fafb;
}

.brand-logo {
  display: block;
  width: 40px;
  height: 40px;
  object-fit: contain;
  background-color: #ffffff;
  padding: 3px;
  border-radius: 0.45rem;
}

.brand-text {
  display: block;
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 0.05rem;
  line-height: 1.05;
  min-height: 40px;
  justify-content: center;
  align-items: flex-start;
}

.brand-title {
  font-weight: 800;
  letter-spacing: 0.08em;
  font-size: 1rem;
  text-transform: uppercase;
  line-height: 1;
  color: #ffffff;
}

.brand-slogan {
  font-size: 0.78rem;
  color: var(--color-accent);
  line-height: 1.1;
}

.primary-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 1rem;
  margin: 0;
  padding: 0;
}

.nav-link {
  color: #e5e7eb;
  font-size: 0.9rem;
  padding: 0.35rem 0.5rem;
  border-radius: 999px;
}

.nav-link:hover,
.nav-link:focus-visible {
  background-color: rgba(15, 23, 42, 0.35);
  color: #ffffff;
  text-decoration: none;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.3rem;
}

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  margin: 4px 0;
  background-color: #f9fafb;
}

.theme-toggle,
.theme-toggle-secondary {
  background: transparent;
  border: 1px solid rgba(249, 250, 251, 0.4);
  border-radius: 999px;
  padding: 0.25rem 0.6rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: #f9fafb;
}

.theme-toggle:focus-visible,
.theme-toggle-secondary:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.theme-toggle-icon {
  font-size: 0.9rem;
}

body.theme-dark .theme-toggle-icon-sun {
  opacity: 0.4;
}

body.theme-dark .theme-toggle-icon-moon {
  opacity: 1;
}

body:not(.theme-dark) .theme-toggle-icon-sun {
  opacity: 1;
}

body:not(.theme-dark) .theme-toggle-icon-moon {
  opacity: 0.4;
}

.page-layout {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem;
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr) 260px;
  gap: 1rem;
  align-items: flex-start;
}

.sidebar-left {
  background-color: var(--color-dark-bg);
  color: #e5e7eb;
  border-radius: var(--radius-lg);
  padding: 0.75rem 0.75rem 1rem;
  position: sticky;
  top: 64px;
  max-height: calc(100vh - 80px);
  overflow: auto;
}

.sidebar-section + .sidebar-section {
  margin-top: 0.5rem;
}

.sidebar-heading {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: none;
  border: none;
  color: inherit;
  font-weight: 600;
  padding: 0.35rem 0.5rem;
  border-radius: 0.4rem;
  cursor: pointer;
}

.sidebar-heading:hover,
.sidebar-heading:focus-visible {
  background-color: rgba(15, 23, 42, 0.8);
}

.sidebar-links {
  list-style: none;
  padding: 0.15rem 0 0.4rem;
  margin: 0;
}

.sidebar-link {
  display: block;
  padding: 0.25rem 0.7rem;
  margin: 0.05rem 0;
  font-size: 0.85rem;
  color: #d1d5db;
  border-left: 3px solid transparent;
}

.sidebar-link:hover,
.sidebar-link:focus-visible {
  background-color: rgba(15, 23, 42, 0.8);
  color: #ffffff;
  text-decoration: none;
}

.sidebar-link.is-active {
  border-left-color: var(--color-accent);
  background-color: rgba(17, 24, 39, 0.8);
}

.main-area {
  background-color: rgba(255, 255, 255, 0.98);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem 2rem;
  box-shadow: var(--shadow-soft);
}

body.theme-dark .main-area {
  background-color: #111827;
}

.sidebar-right {
  position: sticky;
  top: 64px;
  max-height: calc(100vh - 80px);
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.sidebar-card {
  background-color: rgba(17, 24, 39, 0.95);
  color: #e5e7eb;
  padding: 0.8rem 0.9rem 1rem;
  border-radius: var(--radius-md);
  box-shadow: 0 5px 15px rgba(15, 23, 42, 0.5);
  border: 1px solid rgba(55, 65, 81, 0.9);
}

.sidebar-card-header h2 {
  margin: 0 0 0.35rem;
  font-size: 0.95rem;
}

.toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.85rem;
}

.toc-list li + li {
  margin-top: 0.2rem;
}

.toc-list a {
  color: #e5e7eb;
}

.toc-list a:hover,
.toc-list a:focus-visible {
  color: var(--color-accent);
  text-decoration: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  min-width: 44px;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: background-color 0.15s ease, color 0.15s ease, transform 0.05s ease;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #f9fafb;
}

.btn-primary:hover {
  background-color: #163366;
}

.btn-outline {
  background-color: transparent;
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
}

.btn-outline:hover {
  background-color: rgba(29, 68, 138, 0.08);
}

.btn-try {
  background-color: #10b981;
  color: #022c22;
}

.btn-try:hover {
  background-color: #059669;
}

.btn-whatsapp {
  background-color: #22c55e;
  color: #022c22;
}

.btn-whatsapp:hover {
  background-color: #16a34a;
}

.btn-email {
  background-color: #3b82f6;
  color: #ffffff;
}

.btn-email:hover {
  background-color: #2563eb;
}

.btn-link {
  font-size: 0.9rem;
  color: var(--color-primary);
}

.btn-text {
  background: none;
  border: none;
  color: var(--color-primary);
  font-size: 0.85rem;
  padding: 0;
  cursor: pointer;
}

.btn-text:hover {
  text-decoration: underline;
}

.btn.full-width {
  width: 100%;
}

.page-title {
  margin: 0;
  color: var(--color-primary);
  font-size: 1.6rem;
}

.page-subtitle {
  margin: 0.15rem 0 0;
  color: var(--color-text-muted);
  font-size: 0.98rem;
}

.section {
  margin-bottom: 2rem;
}

.section-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.home-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.learning-paths {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-bottom: 1.75rem;
}

.path-card {
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: 1rem;
  background: linear-gradient(135deg, #ffffff, #f9fafb);
}

body.theme-dark .path-card {
  background: linear-gradient(135deg, #020617, #020617);
  border-color: #1f2937;
}

.path-card h2 {
  margin-top: 0;
  color: var(--color-primary);
  font-size: 1.1rem;
}

.path-card ul {
  padding-left: 1.1rem;
  margin: 0.35rem 0 0.6rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 0.15rem 0.6rem;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-free {
  background-color: #dcfce7;
  color: #166534;
}

.badge-paid {
  background-color: #fef3c7;
  color: #92400e;
}

.badge-level {
  background-color: #e5e7eb;
  color: #111827;
}

body.theme-dark .badge-level {
  background-color: #1f2937;
  color: #e5e7eb;
}

.programs-grid-wrapper .section-heading h2 {
  margin: 0;
  font-size: 1.3rem;
}

.programs-grid-wrapper .section-heading p {
  margin: 0.15rem 0 0;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.programs-grid {
  margin-top: 1rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem;
}

.program-card {
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  padding: 0.85rem 0.85rem 0.85rem;
  background-color: #ffffff;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

body.theme-dark .program-card {
  background-color: #020617;
  border-color: #1f2937;
}

.program-card h3 {
  margin: 0;
  font-size: 1rem;
  color: var(--color-primary);
}

.program-card p {
  margin: 0;
}

.program-meta {
  font-size: 0.76rem;
  color: var(--color-text-muted);
}

.program-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  margin-top: 0.2rem;
}

.tag {
  border-radius: 999px;
  padding: 0.05rem 0.45rem;
  background-color: #eff6ff;
  font-size: 0.72rem;
}

.tag-level {
  background-color: #ecfdf5;
}

body.theme-dark .tag {
  background-color: #1f2937;
}

.program-actions {
  margin-top: 0.4rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
}

.section-programs-template .programs-list {
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.program-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.7rem 0.9rem;
}

@media (max-width: 480px) {
  .program-row {
    flex-direction: column;
    align-items: flex-start;
  }
}

.program-row-expanded {
  align-items: flex-start;
}

.program-row-main {
  min-width: 0;
}

.topics {
  margin-top: 0.45rem;
}

.topics summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--color-primary);
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.25rem 0.4rem;
  border-radius: 0.4rem;
}

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

.topics summary::before {
  content: "▸";
  font-size: 0.9rem;
  transform: translateY(-1px);
}

.topics[open] summary::before {
  content: "▾";
}

.topics summary:hover,
.topics summary:focus-visible {
  background-color: rgba(29, 68, 138, 0.08);
  text-decoration: none;
}

.topics ul {
  margin: 0.4rem 0 0;
  padding-left: 1.1rem;
  color: var(--color-text);
  font-size: 0.88rem;
}

.topics li + li {
  margin-top: 0.2rem;
}

.program-row:nth-child(odd) {
  background-color: rgba(249, 250, 251, 0.9);
}

body.theme-dark .program-row:nth-child(odd) {
  background-color: #020617;
}

.program-row h3 {
  margin: 0;
  font-size: 0.95rem;
  color: var(--color-primary);
}

.program-row p {
  margin: 0.1rem 0 0;
  font-size: 0.85rem;
}

.program-row-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.inperson-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.inperson-card {
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  padding: 0.9rem;
  background-color: rgba(249, 250, 251, 0.9);
}

body.theme-dark .inperson-card {
  background-color: #020617;
}

.breadcrumb {
  font-size: 0.75rem;
  margin-bottom: 0.75rem;
}

.breadcrumb ol {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}

.breadcrumb li::after {
  content: "›";
  margin-left: 0.3rem;
}

.breadcrumb li:last-child::after {
  content: "";
}

.tutorial-header {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.tutorial-title {
  margin: 0;
  color: var(--color-primary);
  font-size: 1.4rem;
}

.tutorial-subtitle {
  margin: 0.2rem 0 0;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.tutorial-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  align-items: flex-start;
}

.upgrade-banner {
  border-radius: var(--radius-md);
  padding: 0.9rem 1rem;
  background-color: #fef3d4;
  border: 1px dashed var(--color-accent);
  margin-bottom: 1.1rem;
}

.upgrade-banner h2 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
}

.upgrade-banner ul {
  margin: 0.35rem 0 0.6rem;
  padding-left: 1.15rem;
}

.badge-duration,
.badge-price {
  background-color: #eff6ff;
  color: #1d4ed8;
}

body.theme-dark .badge-duration,
body.theme-dark .badge-price {
  background-color: #1e293b;
  color: #93c5fd;
}

.program-fact-block {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
  margin-bottom: 1.1rem;
}

.program-fact {
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  padding: 0.8rem 0.9rem;
  background-color: rgba(249, 250, 251, 0.9);
}

body.theme-dark .program-fact {
  background-color: #020617;
}

.program-fact-wide {
  grid-column: 1 / -1;
}

.program-fact h3 {
  margin: 0 0 0.3rem;
  font-size: 0.95rem;
  color: var(--color-primary);
}

.program-fact p,
.program-fact ul {
  margin: 0;
  font-size: 0.9rem;
}

.program-fact ul {
  padding-left: 1.1rem;
}

.learning-mode-block {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
  margin-bottom: 1.1rem;
}

.mode-card {
  border-radius: var(--radius-md);
  padding: 0.9rem 1rem;
  background-color: #fef3d4;
  border: 1px dashed var(--color-accent);
}

.mode-card h3 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
  color: var(--color-primary);
}

.mode-card p {
  margin: 0;
  font-size: 0.9rem;
}

.notice {
  border-radius: var(--radius-md);
  padding: 0.7rem 0.9rem;
  font-size: 0.88rem;
  margin-bottom: 1.1rem;
}

.notice-info {
  background-color: #eff6ff;
  border-left: 4px solid var(--color-primary);
  color: var(--color-text);
}

body.theme-dark .notice-info {
  background-color: #0f1f33;
}

.enrollment-cta {
  margin-top: 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border);
}

.curriculum-levels {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 0.5rem;
}

.curriculum-level {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.8rem 0.9rem;
}

.curriculum-level-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin-bottom: 0.6rem;
}

.curriculum-level-header h4 {
  margin: 0;
  font-size: 1rem;
  color: var(--color-primary);
}

.curriculum-module {
  padding: 0.6rem 0;
  border-top: 1px dashed var(--color-border);
}

.curriculum-module:first-of-type {
  border-top: none;
  padding-top: 0;
}

.curriculum-module h4 {
  margin: 0 0 0.3rem;
  font-size: 0.92rem;
}

.curriculum-label {
  margin: 0.4rem 0 0.15rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.curriculum-module ul {
  margin: 0;
  padding-left: 1.1rem;
  font-size: 0.88rem;
}

.lesson-body-heading {
  margin: 1.5rem 0 0.75rem;
  color: var(--color-primary);
  font-size: 1.1rem;
}

.admin-panel {
  max-width: 640px;
}

.admin-login-form {
  max-width: 360px;
}

.admin-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.admin-section {
  border-top: 1px solid var(--color-border);
  padding-top: 1.25rem;
  margin-top: 1.5rem;
}

.admin-section h2 {
  color: var(--color-primary);
  font-size: 1.1rem;
  margin: 0 0 0.3rem;
}

.admin-table-wrapper {
  overflow-x: auto;
  margin-top: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  min-width: 480px;
}

.admin-table th,
.admin-table td {
  text-align: left;
  padding: 0.5rem 0.6rem;
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

.admin-table td:nth-child(6) {
  white-space: normal;
}

.my-class-result {
  margin-top: 1.5rem;
  padding: 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background-color: rgba(249, 250, 251, 0.9);
}

body.theme-dark .my-class-result {
  background-color: #020617;
}

.my-class-details {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.3rem 1rem;
  margin: 0 0 0.75rem;
}

.my-class-details dt {
  font-weight: 600;
  color: var(--color-text-muted);
}

.my-class-details dd {
  margin: 0;
}

@media (max-width: 768px) {
  .program-fact-block,
  .learning-mode-block {
    grid-template-columns: 1fr;
  }
}

.tutorial-body section + section {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

.tutorial-body h2 {
  color: var(--color-primary);
  font-size: 1.2rem;
  margin: 0 0 0.5rem;
}

.tutorial-body h3 {
  font-size: 1.05rem;
  margin: 0 0 0.35rem;
}

.tutorial-body ul,
.tutorial-body ol {
  margin: 0.35rem 0 0.6rem;
  padding-left: 1.3rem;
}

.tutorial-body li {
  margin-bottom: 0.2rem;
  font-size: 0.92rem;
  line-height: 1.6;
}

.tutorial-body code {
  background-color: var(--color-code-bg);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  font-size: 0.85em;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

.tutorial-body pre code {
  background: none;
  padding: 0;
  font-size: inherit;
}

.note-box {
  margin-top: 0.5rem;
  padding: 0.7rem 0.8rem;
  border-radius: 0.5rem;
  background-color: #fef3d4;
  border-left: 4px solid var(--color-accent);
  font-size: 0.9rem;
}

.code-example {
  margin-top: 0.5rem;
}

.code-example p {
  margin: 0 0 0.35rem;
  font-weight: 600;
  font-size: 0.92rem;
}

.code-example pre {
  max-height: 420px;
  overflow-y: auto;
}

pre {
  margin: 0;
  padding: 0.7rem 0.8rem;
  border-radius: 0.5rem;
  background-color: var(--color-code-bg);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 0.82rem;
  overflow-x: auto;
}

.code-example .btn-try {
  margin-top: 0.4rem;
}

.quiz fieldset {
  border: 1px solid var(--color-border);
  border-radius: 0.5rem;
  padding: 0.75rem 0.8rem;
  margin: 0 0 0.5rem;
}

.quiz legend {
  font-weight: 600;
  font-size: 0.95rem;
}

.quiz label {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.9rem;
}

.quiz-feedback {
  font-size: 0.85rem;
  margin-top: 0.3rem;
}

.quiz-feedback.is-correct {
  color: #15803d;
}

.quiz-feedback.is-incorrect {
  color: #b91c1c;
}

.tutorial-pagination {
  margin-top: 1.25rem;
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
}

.contact-inline {
  margin-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
}

.section-contact {
  background: linear-gradient(135deg, var(--color-primary), #0b1621);
  color: #f9fafb;
  padding: 2rem 1rem 2.5rem;
}

.section-contact .section-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.section-contact .section-heading h2 {
  margin: 0;
}

.section-contact .section-heading p {
  margin: 0.25rem 0 0;
}

.contact-layout {
  margin-top: 1.5rem;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 1.5rem;
}

.contact-details h3 {
  margin-top: 0;
}

.contact-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.contact-form {
  background-color: rgba(15, 23, 42, 0.9);
  border-radius: var(--radius-lg);
  padding: 1rem 1.1rem 1.2rem;
  box-shadow: var(--shadow-soft);
}

.contact-form h3 {
  margin-top: 0;
}

.contact-form label {
  display: block;
  margin-top: 0.6rem;
  font-size: 0.9rem;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  margin-top: 0.15rem;
  border-radius: 0.4rem;
  border: 1px solid #4b5563;
  padding: 0.5rem 0.6rem;
  font-size: 0.9rem;
  background-color: #020617;
  color: #f9fafb;
}



.contact-form textarea {
  resize: vertical;
}

/* Contact section links on dark background */
.contact-details a {
  color: #ffffff;
  text-decoration: underline;
  font-weight: 500;
}

.contact-details a:hover,
.contact-details a:focus-visible {
  color: var(--color-accent);
}

/* Sidebar card links on dark background */
.sidebar-card a {
  color: #ffffff !important;
  text-decoration: underline;
  font-weight: 500;
}

.sidebar-card a:hover,
.sidebar-card a:focus-visible {
  color: var(--color-accent) !important;
}

.contact-form .form-feedback {
  margin-top: 0.5rem;
  font-size: 0.85rem;
}

.site-footer {
  background-color: var(--color-primary);
  color: #e5e7eb;
  padding: 1.8rem 1rem 1.4rem;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 1.5rem;
}

.footer-column h3 {
  margin-top: 0;
  font-size: 0.95rem;
}

.footer-column ul {
  list-style: none;
  margin: 0.3rem 0 0;
  padding: 0;
  font-size: 0.85rem;
}

.footer-column a {
  color: #f9fafb;
}

.footer-column a:hover,
.footer-column a:focus-visible {
  color: var(--color-accent);
}

.footer-social {
  margin-top: 0.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  font-size: 0.85rem;
}

.footer-bottom a {
  color: #f9fafb;
  text-decoration: underline;
}

.footer-bottom a:hover,
.footer-bottom a:focus-visible {
  color: var(--color-accent);
}

.footer-bottom {
  max-width: 1200px;
  margin: 1rem auto 0;
  padding-top: 0.6rem;
  border-top: 1px solid rgba(226, 232, 240, 0.4);
  font-size: 0.8rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.made-in-badge {
  background-color: var(--color-accent);
  color: #111827;
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.78rem;
}

.modal {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1500;
}

.modal.is-open {
  display: flex;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.7);
}

.modal-dialog {
  position: relative;
  z-index: 1;
  max-width: 960px;
  width: 95%;
  max-height: 90vh;
  background-color: var(--color-page-bg);
  border-radius: var(--radius-lg);
  box-shadow: 0 25px 50px rgba(15, 23, 42, 0.6);
  display: flex;
  flex-direction: column;
}

.modal-header {
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h2 {
  margin: 0;
  font-size: 1rem;
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.3rem;
  cursor: pointer;
  color: var(--color-text);
}

.modal-body {
  padding: 0.9rem 1rem 1rem;
  overflow: auto;
}

.try-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 0.8rem;
}

.try-editor-wrapper,
.try-preview-wrapper {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.code-editor {
  width: 100%;
  min-height: 260px;
  border-radius: 0.5rem;
  border: 1px solid var(--color-border);
  padding: 0.6rem 0.7rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 0.85rem;
  background-color: var(--color-code-bg);
  resize: vertical;
}

.preview-title {
  font-size: 0.9rem;
  margin: 0;
}

#try-preview {
  border-radius: 0.5rem;
  border: 1px solid var(--color-border);
  background-color: #ffffff;
  min-height: 260px;
}

.visually-hidden {
  position: absolute !important;
  height: 1px;
  width: 1px;
  overflow: hidden;
  clip: rect(1px, 1px, 1px, 1px);
  white-space: nowrap;
}

@media (max-width: 1100px) {
  .programs-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 1024px) {
  .page-layout {
    grid-template-columns: 230px minmax(0, 1fr);
  }

  .sidebar-right {
    display: none;
  }

  .footer-inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .contact-layout {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 900px) {
  .inperson-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 768px) {
  .top-nav-inner {
    align-items: center;
  }

  .primary-nav {
    order: 3;
    width: 100%;
  }

  .nav-toggle {
    display: inline-block;
  }

  .nav-links {
    display: none;
    flex-direction: column;
    gap: 0;
    margin-top: 0.4rem;
  }

  .nav-links.is-open {
    display: flex;
  }

  .nav-link {
    padding: 0.5rem 0.1rem;
  }

  .page-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .sidebar-left {
    order: 2;
    position: static;
    max-height: none;
  }

  .main-area {
    order: 1;
  }

  .learning-paths {
    grid-template-columns: minmax(0, 1fr);
  }

  .programs-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .section-contact {
    padding-inline: 0.75rem;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .try-layout {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 480px) {
  .top-nav-inner {
    padding-inline: 0.7rem;
  }

  .page-layout {
    padding-inline: 0.7rem;
  }

  .main-area {
    padding-inline: 1rem;
  }

  .home-cta-group {
    flex-direction: column;
  }

  .tutorial-body pre {
    font-size: 0.75rem;
    padding: 0.5rem;
  }

  .code-example pre {
    max-height: 320px;
  }
}