/*
  Shared stylesheet for the Learning Portal pages:
  learning-portal.html, stage-1.html .. stage-4.html.

  Design tokens + component styles only -- no page content lives here.
  Extracted from what used to be 5 near-identical <style> blocks so the
  whole portal has one consistent, maintainable design system.
*/

:root {
  --rd-bg: #050505;
  --rd-bg-raised: #111111;
  --rd-bg-raised-2: #1b1b1b;
  --rd-border: #262626;
  --rd-border-strong: #333333;

  --rd-blue: #2563eb;
  --rd-blue-light: #3b82f6;
  --rd-blue-pale: #dbeafe;
  --rd-blue-tint: rgba(37, 99, 235, 0.12);

  --rd-white: #ffffff;
  --rd-text: #e5e7eb;
  --rd-text-muted: #64748b;
  --rd-text-dim: #94a3b8;

  --rd-success: #22c55e;
  --rd-warning: #d99a2b;
  --rd-danger: #ef4444;

  --rd-space-1: 4px;
  --rd-space-2: 8px;
  --rd-space-3: 12px;
  --rd-space-4: 16px;
  --rd-space-5: 20px;
  --rd-space-6: 24px;
  --rd-space-8: 32px;
  --rd-space-10: 40px;
  --rd-space-12: 48px;

  --rd-radius-sm: 6px;
  --rd-radius-md: 10px;
  --rd-radius-lg: 16px;

  --rd-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35);
  --rd-shadow-md: 0 4px 16px rgba(0, 0, 0, 0.35);
  --rd-shadow-focus: 0 0 0 3px rgba(37, 99, 235, 0.35);

  --rd-font-mono: 'Share Tech Mono', ui-monospace, monospace;
  --rd-container-max: 1280px;
  --rd-content-max: 860px;
  --rd-quiz-max: 640px;
}

/* =========================================================
   Base page + container
   ========================================================= */

.section-middle {
  background-color: var(--rd-bg);
  padding-top: var(--rd-space-8);
  padding-bottom: var(--rd-space-12);
}

.rd-container {
  width: 100%;
  max-width: var(--rd-container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--rd-space-5);
  padding-right: var(--rd-space-5);
  box-sizing: border-box;
}

.section-middle .paragraph {
  color: var(--rd-text-dim);
}

.heading-section.events {
  color: var(--rd-white);
  font-size: 26px;
  line-height: 1.25;
  margin-top: 0;
  margin-bottom: var(--rd-space-2);
}

.paragraph.big {
  color: var(--rd-text-dim);
  font-size: 14px;
  max-width: var(--rd-content-max);
  margin-bottom: var(--rd-space-6);
}

/* =========================================================
   Header (nav)
   ========================================================= */

.navbar.w-nav {
  background-color: var(--rd-bg);
  border-bottom: 1px solid var(--rd-border);
}

.navbar .div-block-nav {
  max-width: var(--rd-container-max);
  margin-left: auto;
  margin-right: auto;
  padding: var(--rd-space-3) var(--rd-space-5);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar .brand.w-nav-brand {
  max-width: 150px;
}

.navbar .brand img {
  display: block;
  max-height: 32px;
  width: auto;
}

.navbar .nav-menu.w-nav-menu {
  align-items: center;
  gap: var(--rd-space-2);
}

.navbar .nav-link.w-nav-link {
  color: var(--rd-text-dim);
  padding: var(--rd-space-2) var(--rd-space-3);
  font-size: 14px;
  border-radius: var(--rd-radius-sm);
  transition: color 0.2s ease, background-color 0.2s ease;
}

.navbar .nav-link.w-nav-link:hover,
.navbar .nav-link.w-nav-link.w--current {
  color: var(--rd-white);
  background-color: var(--rd-bg-raised);
}

.navbar .menu-button.w-nav-button {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--rd-radius-sm);
}

.navbar .menu-button.w-nav-button:hover {
  background-color: var(--rd-bg-raised);
}

/* =========================================================
   Footer
   ========================================================= */

.section-middle + .footer {
  background-color: var(--rd-bg-raised);
  border-top: 1px solid var(--rd-border);
}

.footer .div-block-nav.footer {
  max-width: var(--rd-container-max);
  margin-left: auto;
  margin-right: auto;
  padding: var(--rd-space-8) var(--rd-space-5) var(--rd-space-5);
  display: flex;
  flex-wrap: wrap;
  gap: var(--rd-space-8);
  justify-content: space-between;
}

.footer .brand.footer img {
  max-height: 28px;
  width: auto;
}

.footer .text-block,
.footer .text-block-2 {
  color: var(--rd-text-muted);
  font-size: 13px;
}

.footer .link-footer {
  color: var(--rd-text-dim);
  font-size: 13px;
  transition: color 0.2s ease;
}

.footer .link-footer:hover {
  color: var(--rd-white);
}

.footer .div-block-right-footer-inside {
  flex-direction: column;
  gap: var(--rd-space-2);
  display: flex;
}

.footer .div-block-footer-base {
  max-width: var(--rd-container-max);
  margin-left: auto;
  margin-right: auto;
  padding: var(--rd-space-4) var(--rd-space-5);
  border-top: 1px solid var(--rd-border);
  color: var(--rd-text-muted);
  font-size: 12px;
}

/* =========================================================
   Progress bar (shared: overview, stage cards, section headers)
   ========================================================= */

.progress-bar {
  height: 8px;
  background-color: var(--rd-bg-raised-2);
  border: 1px solid var(--rd-border);
  border-radius: 5px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background-image: linear-gradient(90deg, var(--rd-blue), var(--rd-blue-light));
  border-radius: 5px;
  transition: width 0.6s ease;
}

.progress-label {
  color: var(--rd-text-muted);
  font-family: var(--rd-font-mono);
  font-size: 12px;
  white-space: nowrap;
}

/* =========================================================
   Portal overview (learning-portal.html): heading + overall
   progress card + Sessions/Topics/Projects stat row
   ========================================================= */

.overall-progress-section {
  max-width: var(--rd-content-max);
  margin: 0 auto var(--rd-space-8);
}

.portal-overview-card {
  background-color: var(--rd-bg-raised);
  border: 1px solid var(--rd-border);
  border-radius: var(--rd-radius-lg);
  padding: var(--rd-space-6);
}

.portal-overview-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--rd-space-3);
  margin-bottom: var(--rd-space-3);
}

.portal-overview-label {
  color: var(--rd-text-dim);
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--rd-space-4);
  margin-top: var(--rd-space-6);
  padding-top: var(--rd-space-5);
  border-top: 1px solid var(--rd-border);
}

.stat-item {
  display: flex;
  flex-direction: column;
  gap: var(--rd-space-1);
}

.stat-label {
  color: var(--rd-text-muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.stat-value {
  color: var(--rd-white);
  font-family: var(--rd-font-mono);
  font-size: 18px;
  font-weight: 600;
}

/* =========================================================
   Stage cards grid (learning-portal.html)
   ========================================================= */

.stages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--rd-space-5);
}

.stage-card {
  display: flex;
  flex-direction: column;
  background-color: var(--rd-bg-raised);
  border: 1px solid var(--rd-border);
  border-radius: var(--rd-radius-lg);
  padding: var(--rd-space-5);
  text-decoration: none;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.stage-card:hover {
  border-color: var(--rd-blue);
  box-shadow: var(--rd-shadow-md);
  transform: translateY(-2px);
}

.stage-card-number {
  display: inline-flex;
  align-items: center;
  color: var(--rd-blue-light);
  background-color: var(--rd-blue-tint);
  border-radius: var(--rd-radius-sm);
  padding: var(--rd-space-1) var(--rd-space-2);
  font-family: var(--rd-font-mono);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  width: fit-content;
  margin-bottom: var(--rd-space-3);
}

.stage-card-title {
  color: var(--rd-white);
  font-size: 17px;
  line-height: 1.3;
  margin: 0 0 var(--rd-space-2);
}

.stage-card-theme {
  display: inline-flex;
  align-items: center;
  color: var(--rd-text-muted);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--rd-space-5);
}

.stage-card-progress {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: var(--rd-space-2);
}

.stage-card-progress .progress-label {
  text-align: right;
}

/* =========================================================
   Stage page hero
   ========================================================= */

.stage-hero {
  margin-bottom: var(--rd-space-8);
}

.stage-hero-eyebrow {
  display: inline-flex;
  color: var(--rd-blue-light);
  font-family: var(--rd-font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  margin-bottom: var(--rd-space-2);
}

.stage-hero-title {
  color: var(--rd-white);
  font-size: 26px;
  line-height: 1.25;
  margin: 0 0 var(--rd-space-2);
}

.stage-hero-tag {
  display: inline-flex;
  color: var(--rd-blue-light);
  background-color: var(--rd-blue-tint);
  border-radius: var(--rd-radius-sm);
  padding: var(--rd-space-1) var(--rd-space-3);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--rd-space-3);
}

.stage-hero-desc {
  color: var(--rd-text-dim);
  font-size: 14px;
  max-width: var(--rd-content-max);
  margin: 0;
}

/* =========================================================
   Section header component (Sessions / Topics / Projects)
   ========================================================= */

.section-block {
  max-width: var(--rd-content-max);
  margin: 0 auto;
}

.section-block + .section-block {
  margin-top: var(--rd-space-10);
}

.section-header {
  margin-bottom: var(--rd-space-4);
}

.section-header-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--rd-space-3);
  margin-bottom: var(--rd-space-2);
}

.stage-section-heading {
  color: var(--rd-white);
  font-size: 18px;
  font-weight: 700;
  margin: 0;
}

.section-header .progress-label {
  font-size: 13px;
}

/* =========================================================
   Learning item cards (session / topic / project)
   ========================================================= */

.checklist-item {
  background-color: var(--rd-bg-raised);
  border: 1px solid var(--rd-border);
  border-radius: var(--rd-radius-md);
  margin-bottom: var(--rd-space-3);
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.checklist-item:hover {
  border-color: var(--rd-border-strong);
}

.checklist-item.item-done {
  border-color: rgba(34, 197, 94, 0.4);
}

.lesson-header {
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: var(--rd-space-3);
  padding: var(--rd-space-4);
}

.lesson-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--rd-blue-light);
  background-color: var(--rd-blue-tint);
  border-radius: var(--rd-radius-sm);
}

.lesson-icon svg {
  width: 18px;
  height: 18px;
}

.lesson-text {
  flex: 1;
  min-width: 0;
  padding-top: var(--rd-space-1);
}

.lesson-title {
  color: var(--rd-white);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
}

.lesson-desc {
  color: var(--rd-text-muted);
  font-size: 13px;
  line-height: 1.5;
  margin-top: var(--rd-space-1);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.lesson-controls {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: var(--rd-space-3);
  padding-top: var(--rd-space-1);
}

.xp-info {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
}

.xp-badge {
  display: inline-flex;
  align-items: center;
  color: var(--rd-blue-light);
  background-color: var(--rd-blue-tint);
  border-radius: 999px;
  padding: 3px 10px;
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

.xp-badge-note {
  color: var(--rd-text-muted);
  font-size: 11px;
  white-space: nowrap;
}

.lesson-expand-button {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--rd-text-muted);
  background: none;
  border: 0;
  border-radius: var(--rd-radius-sm);
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.lesson-expand-button:hover {
  color: var(--rd-white);
  background-color: var(--rd-bg-raised-2);
}

.lesson-expand-icon {
  display: inline-flex;
  transition: transform 0.2s ease;
}

.lesson-expand-icon svg {
  width: 18px;
  height: 18px;
}

.lesson-header.expanded .lesson-expand-icon {
  transform: rotate(180deg);
}

.lesson-body {
  border-top: 1px solid var(--rd-border);
  padding: var(--rd-space-5);
}

.lesson-body-section {
  margin-bottom: var(--rd-space-5);
}

.lesson-body-section:last-child {
  margin-bottom: 0;
}

.lesson-body-heading {
  color: var(--rd-text-dim);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 0 0 var(--rd-space-3);
}

.lesson-body-text {
  color: var(--rd-text-dim);
  font-size: 14px;
  line-height: 1.6;
}

/* =========================================================
   PDF / study material button
   ========================================================= */

.pdf-link {
  display: inline-flex;
  align-items: center;
  gap: var(--rd-space-2);
  color: var(--rd-white);
  background-color: var(--rd-blue);
  border-radius: var(--rd-radius-sm);
  padding: 10px 16px;
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  transition: background-color 0.2s ease;
}

.pdf-link:hover {
  background-color: var(--rd-blue-light);
}

.pdf-link svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.pdf-missing {
  color: var(--rd-text-muted);
  font-size: 13px;
  font-style: italic;
}

/* =========================================================
   Quiz
   ========================================================= */

.topic-quiz {
  max-width: var(--rd-quiz-max);
}

.quiz-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--rd-space-3);
  margin-bottom: var(--rd-space-3);
}

.quiz-attempt-count {
  color: var(--rd-text-muted);
  font-family: var(--rd-font-mono);
  font-size: 12px;
}

.quiz-history {
  display: flex;
  flex-wrap: wrap;
  gap: var(--rd-space-2);
  margin-bottom: var(--rd-space-4);
}

.quiz-history-empty {
  color: var(--rd-text-muted);
  font-size: 13px;
  font-style: italic;
  margin: 0 0 var(--rd-space-4);
}

.quiz-history-item {
  color: var(--rd-blue-light);
  background-color: var(--rd-blue-tint);
  border-radius: 999px;
  padding: 3px 10px;
  font-size: 11px;
  font-weight: 600;
}

.quiz-question {
  background-color: var(--rd-bg);
  border: 1px solid var(--rd-border);
  border-radius: var(--rd-radius-md);
  padding: var(--rd-space-4);
  margin-bottom: var(--rd-space-3);
}

.quiz-question-text {
  color: var(--rd-white);
  font-size: 14px;
  font-weight: 600;
  margin: 0 0 var(--rd-space-3);
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: var(--rd-space-2);
}

.quiz-option {
  display: flex;
  align-items: center;
  gap: var(--rd-space-3);
  color: var(--rd-text);
  font-size: 14px;
  padding: var(--rd-space-2) var(--rd-space-3);
  border: 1px solid transparent;
  border-radius: var(--rd-radius-sm);
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.quiz-option:hover {
  background-color: var(--rd-bg-raised-2);
}

.quiz-option:has(input:checked) {
  background-color: var(--rd-blue-tint);
  border-color: var(--rd-blue);
}

.quiz-option.quiz-correct {
  color: var(--rd-success);
  background-color: rgba(34, 197, 94, 0.1);
  border-color: rgba(34, 197, 94, 0.4);
  font-weight: 600;
}

.quiz-option.quiz-incorrect {
  color: var(--rd-danger);
  background-color: rgba(239, 68, 68, 0.1);
  border-color: rgba(239, 68, 68, 0.4);
  font-weight: 600;
}

.quiz-submit-button {
  display: inline-flex;
  align-items: center;
  color: var(--rd-white);
  cursor: pointer;
  background-color: var(--rd-blue);
  border: 0;
  border-radius: var(--rd-radius-sm);
  padding: 10px 18px;
  font-size: 13px;
  font-weight: 600;
  transition: background-color 0.2s ease;
}

.quiz-submit-button:hover:not(:disabled) {
  background-color: var(--rd-blue-light);
}

.quiz-submit-button:disabled {
  cursor: default;
  opacity: 0.6;
}

.quiz-retry-button {
  display: inline-flex;
  align-items: center;
  color: var(--rd-blue-light);
  cursor: pointer;
  background-color: transparent;
  border: 1px solid var(--rd-blue);
  border-radius: var(--rd-radius-sm);
  padding: 9px 18px;
  font-size: 13px;
  font-weight: 600;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.quiz-retry-button:hover {
  color: var(--rd-white);
  background-color: var(--rd-blue);
}

.quiz-result {
  color: var(--rd-blue-light);
  font-size: 13px;
  font-weight: 600;
  margin-top: var(--rd-space-3);
}

/* Radio buttons: custom styled, whole row clickable via <label> */
.quiz-option input[type='radio'] {
  appearance: none;
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin: 0;
  border: 2px solid var(--rd-text-muted);
  border-radius: 50%;
  transition: border-color 0.2s ease, border-width 0.2s ease;
}

.quiz-option:hover input[type='radio'] {
  border-color: var(--rd-blue-light);
}

.quiz-option input[type='radio']:checked {
  border-color: var(--rd-blue);
  border-width: 5px;
}

.quiz-option input[type='radio']:focus-visible {
  outline: none;
  box-shadow: var(--rd-shadow-focus);
}

/* =========================================================
   Completion checkbox (topics) + approval checkbox (sessions/
   projects): custom styled, native input kept for a11y/logic
   ========================================================= */

.mark-complete-checkbox,
.submit-approval-checkbox {
  appearance: none;
  -webkit-appearance: none;
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  margin: 0;
  display: inline-grid;
  place-content: center;
  border: 2px solid var(--rd-text-muted);
  border-radius: var(--rd-radius-sm);
  background-color: transparent;
  cursor: pointer;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.mark-complete-checkbox:hover:not(:disabled),
.submit-approval-checkbox:hover:not(:disabled) {
  border-color: var(--rd-blue-light);
}

.mark-complete-checkbox:focus-visible,
.submit-approval-checkbox:focus-visible {
  outline: none;
  box-shadow: var(--rd-shadow-focus);
}

.mark-complete-checkbox:checked,
.submit-approval-checkbox:checked {
  background-color: var(--rd-blue);
  border-color: var(--rd-blue);
}

.mark-complete-checkbox:checked::after,
.submit-approval-checkbox:checked::after {
  content: '';
  width: 7px;
  height: 11px;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg) translate(-1px, -1px);
}

.mark-complete-checkbox:disabled,
.submit-approval-checkbox:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.topic-complete-checkbox {
  display: flex;
  align-items: center;
  gap: var(--rd-space-2);
  color: var(--rd-text-dim);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}

/* =========================================================
   Status pills: approval-pending / approval-verified / completed
   ========================================================= */

.approval-status {
  display: inline-flex;
  align-items: center;
  gap: var(--rd-space-1);
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 700;
}

.approval-status.approval-pending {
  color: var(--rd-warning);
  background-color: rgba(217, 154, 43, 0.12);
}

.approval-status.approval-verified {
  color: var(--rd-success);
  background-color: rgba(34, 197, 94, 0.12);
}

.lesson-completion-status {
  display: inline-flex;
  align-items: center;
  gap: var(--rd-space-1);
  color: var(--rd-text-muted);
  font-size: 13px;
  margin-top: var(--rd-space-3);
}

.lesson-completion-status.is-complete {
  color: var(--rd-success);
  font-weight: 600;
}

.lesson-completion-status svg {
  width: 15px;
  height: 15px;
}

/* =========================================================
   Misc / legacy hooks kept for JS compatibility
   ========================================================= */

.portal-card-body {
  color: var(--rd-text-dim);
  font-size: 14px;
  line-height: 1.6;
}

/* =========================================================
   Responsive: tablet
   ========================================================= */

@media screen and (max-width: 991px) {
  .stages-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* =========================================================
   Responsive: mobile (covers 320-479px range explicitly)
   ========================================================= */

@media screen and (max-width: 767px) {
  .stages-grid {
    grid-template-columns: 1fr;
  }

  .stat-row {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--rd-space-2);
  }
}

@media screen and (max-width: 479px) {
  .rd-container,
  .navbar .div-block-nav,
  .footer .div-block-nav.footer,
  .footer .div-block-footer-base {
    padding-left: var(--rd-space-4);
    padding-right: var(--rd-space-4);
  }

  .section-middle {
    padding-top: var(--rd-space-6);
    padding-bottom: var(--rd-space-8);
  }

  .heading-section.events,
  .stage-hero-title {
    font-size: 21px;
  }

  .navbar .brand.w-nav-brand {
    max-width: 120px;
  }

  .navbar .brand img {
    max-height: 26px;
  }

  .portal-overview-card {
    padding: var(--rd-space-4);
  }

  .stat-row {
    grid-template-columns: 1fr 1fr 1fr;
    gap: var(--rd-space-2);
  }

  .stat-value {
    font-size: 15px;
  }

  .stage-card {
    padding: var(--rd-space-4);
  }

  .lesson-header {
    flex-wrap: wrap;
    padding: var(--rd-space-3);
  }

  .lesson-controls {
    flex-basis: 100%;
    justify-content: space-between;
    padding-top: var(--rd-space-2);
    margin-left: calc(36px + var(--rd-space-3));
  }

  .lesson-body {
    padding: var(--rd-space-4);
  }

  .quiz-question {
    padding: var(--rd-space-3);
  }

  .quiz-option {
    padding: var(--rd-space-2);
  }

  .footer .div-block-nav.footer {
    flex-direction: column;
    gap: var(--rd-space-5);
    padding-top: var(--rd-space-6);
  }
}