:root {
  --navy-950: #0a1224;
  --navy-900: #111b33;
  --navy-800: #1b2948;
  --navy-700: #2b3c60;
  --ivory-50: #fffdf6;
  --ivory-100: #faf5e8;
  --ivory-200: #eee5d2;
  --orange-500: #ef6a3a;
  --orange-600: #d85327;
  --teal-600: #197a74;
  --green-700: #237348;
  --red-700: #a63d35;
  --ink: #172033;
  --muted: #617087;
  --white: #ffffff;
  --border: #d9d4c8;
  --shadow-sm: 0 1px 2px rgba(10, 18, 36, 0.06);
  --shadow-md: 0 14px 40px rgba(10, 18, 36, 0.1);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --content-width: 1180px;
  --font-display: "Newsreader", Georgia, serif;
  --font-body: "DM Sans", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background: var(--ivory-50);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
}

button,
input,
textarea,
select {
  font: inherit;
}

button,
a,
select {
  cursor: pointer;
}

a {
  color: inherit;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--orange-500);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  color: var(--white);
  background: var(--navy-900);
  border-radius: var(--radius-sm);
  transform: translateY(-150%);
  transition: transform 180ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  z-index: 50;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 74px;
  padding: 10px max(20px, calc((100vw - var(--content-width)) / 2));
  color: var(--white);
  background: rgba(17, 27, 51, 0.97);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--white);
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  color: var(--navy-950);
  background: var(--orange-500);
  border-radius: 12px 12px 12px 3px;
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 16px;
  letter-spacing: 0.01em;
}

.brand small {
  color: #b9c5da;
  font-size: 12px;
}

.header-actions,
.header-progress {
  display: flex;
  align-items: center;
  gap: 16px;
}

.text-button,
.icon-button {
  color: inherit;
  background: transparent;
  border: 0;
}

.text-button {
  min-height: 44px;
  padding: 8px 10px;
  font-weight: 600;
}

.text-button:hover {
  color: #ffd0bd;
}

.header-progress {
  color: #dbe2ed;
  font-size: 13px;
}

.mini-progress {
  width: 90px;
  height: 6px;
  overflow: hidden;
  background: #34425f;
  border-radius: 99px;
}

.mini-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--orange-500);
  border-radius: inherit;
  transition: width 250ms ease;
}

#main-content {
  min-height: calc(100vh - 150px);
}

.hero {
  position: relative;
  overflow: hidden;
  color: var(--white);
  background: var(--navy-900);
}

.hero::after {
  position: absolute;
  right: -80px;
  bottom: -180px;
  width: 520px;
  height: 520px;
  content: "";
  background: radial-gradient(circle, rgba(239, 106, 58, 0.32), transparent 68%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.55fr);
  gap: 64px;
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 76px 20px 82px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--orange-500);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: var(--font-display);
  line-height: 1.08;
}

h1 {
  max-width: 780px;
  font-size: clamp(48px, 7vw, 84px);
  font-weight: 600;
  letter-spacing: -0.035em;
}

.hero-copy {
  max-width: 690px;
  margin: 24px 0 32px;
  color: #dce4f1;
  font-size: clamp(17px, 2vw, 20px);
}

.hero-actions,
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.primary-button,
.secondary-button,
.quiet-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 11px 18px;
  border-radius: 10px;
  font-weight: 700;
  text-decoration: none;
  transition: color 180ms ease, background 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.primary-button {
  color: var(--white);
  background: var(--orange-500);
  border: 1px solid var(--orange-500);
}

.primary-button:hover {
  background: var(--orange-600);
  border-color: var(--orange-600);
  transform: translateY(-1px);
}

.secondary-button {
  color: var(--navy-900);
  background: transparent;
  border: 1px solid var(--navy-700);
}

.secondary-button:hover {
  color: var(--white);
  background: var(--navy-900);
}

.hero .secondary-button {
  color: var(--white);
  border-color: #70809d;
}

.hero .secondary-button:hover {
  background: rgba(255, 255, 255, 0.1);
}

.quiet-button {
  color: var(--navy-800);
  background: var(--ivory-100);
  border: 1px solid var(--border);
}

.quiet-button:hover {
  background: var(--ivory-200);
}

button:disabled,
.disabled {
  cursor: not-allowed;
  opacity: 0.5;
  transform: none !important;
}

.hero-note {
  align-self: end;
  padding: 24px;
  color: var(--navy-900);
  background: var(--ivory-100);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 2px 22px 22px 22px;
  box-shadow: var(--shadow-md);
}

.hero-note strong {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-display);
  font-size: 25px;
}

.hero-note p {
  margin: 0;
  color: #47536a;
  font-size: 14px;
}

.home-section {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 72px 20px;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 28px;
}

.section-heading h2 {
  font-size: clamp(34px, 4vw, 52px);
}

.section-heading p {
  max-width: 520px;
  margin: 0;
  color: var(--muted);
}

.chapter-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.chapter-card {
  position: relative;
  display: flex;
  min-height: 250px;
  flex-direction: column;
  padding: 24px;
  overflow: hidden;
  color: var(--ink);
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  text-align: left;
  text-decoration: none;
  box-shadow: var(--shadow-sm);
  transition: border-color 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}

.chapter-card:hover {
  border-color: #b5a993;
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.chapter-card.complete {
  border-color: #8fbba4;
  background: #fbfffc;
}

.card-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.status-chip {
  padding: 5px 9px;
  color: var(--navy-800);
  background: var(--ivory-100);
  border-radius: 99px;
  letter-spacing: 0;
  text-transform: none;
}

.complete .status-chip {
  color: var(--green-700);
  background: #e3f3e9;
}

.chapter-card h3 {
  margin: 26px 0 12px;
  font-size: 30px;
}

.chapter-card p {
  margin: 0;
  color: var(--muted);
}

.card-arrow {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: auto;
  padding-top: 24px;
  color: var(--orange-600);
  font-weight: 700;
}

.card-arrow svg {
  width: 18px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.principles-band {
  background: var(--ivory-100);
  border-block: 1px solid var(--ivory-200);
}

.principles-grid {
  display: grid;
  grid-template-columns: 1.2fr repeat(3, 1fr);
  gap: 36px;
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 62px 20px;
}

.principles-grid h2 {
  font-size: 42px;
}

.principle {
  padding-left: 18px;
  border-left: 3px solid var(--orange-500);
}

.principle strong {
  display: block;
  margin-bottom: 8px;
}

.principle p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.formula-card {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 42px;
  padding: 38px;
  color: var(--white);
  background: var(--navy-900);
  border-radius: var(--radius-lg);
}

.formula-card h2 {
  font-size: 42px;
}

.formula {
  align-self: center;
  padding: 24px;
  color: var(--navy-900);
  background: var(--ivory-50);
  border-radius: var(--radius-md);
  font-family: var(--font-display);
  font-size: clamp(23px, 3vw, 35px);
  text-align: center;
}

.formula small {
  display: block;
  margin-top: 10px;
  color: var(--muted);
  font-family: var(--font-body);
  font-size: 13px;
}

.completion-callout {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  margin-top: 12px;
  padding-block: 34px;
  background: #edf6f5;
  border-block: 1px solid #c6e0da;
}

.completion-callout h2 {
  max-width: 620px;
  color: var(--navy-900);
  font-size: clamp(32px, 4vw, 46px);
}

.completion-callout p:not(.eyebrow) {
  max-width: 660px;
  margin: 12px 0 0;
  color: #425268;
}

.course-shell {
  display: grid;
  grid-template-columns: 284px minmax(0, 1fr);
  max-width: 1440px;
  min-height: calc(100vh - 74px);
  margin: 0 auto;
}

.course-sidebar {
  position: sticky;
  top: 74px;
  align-self: start;
  height: calc(100vh - 74px);
  padding: 28px 20px;
  overflow-y: auto;
  background: var(--ivory-100);
  border-right: 1px solid var(--border);
}

.sidebar-label {
  margin: 0 10px 14px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.chapter-nav {
  display: grid;
  gap: 6px;
}

.chapter-nav button {
  display: grid;
  grid-template-columns: 28px 1fr 18px;
  gap: 10px;
  align-items: center;
  min-height: 52px;
  padding: 8px 10px;
  color: var(--ink);
  background: transparent;
  border: 0;
  border-radius: 10px;
  text-align: left;
  transition: background 180ms ease, color 180ms ease;
}

.chapter-nav button:hover {
  background: var(--ivory-200);
}

.chapter-nav button.active {
  color: var(--white);
  background: var(--navy-900);
}

.nav-number {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-size: 12px;
  font-weight: 700;
}

.nav-title {
  font-size: 13px;
  font-weight: 600;
  line-height: 1.3;
}

.nav-check {
  color: var(--green-700);
}

.active .nav-check {
  color: #9de2b9;
}

.sidebar-progress {
  margin-top: 28px;
  padding: 16px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.progress-track {
  height: 8px;
  margin: 10px 0 8px;
  overflow: hidden;
  background: var(--ivory-200);
  border-radius: 99px;
}

.progress-track span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--teal-600);
  transition: width 250ms ease;
}

.sidebar-progress small {
  color: var(--muted);
}

.mobile-chapter-picker {
  display: none;
}

.course-main {
  min-width: 0;
  padding: 48px clamp(24px, 5vw, 72px) 80px;
}

.chapter-header {
  max-width: 850px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border);
}

.chapter-meta {
  display: flex;
  gap: 16px;
  margin-bottom: 14px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

.chapter-header h1 {
  color: var(--navy-900);
  font-size: clamp(42px, 6vw, 68px);
}

.chapter-outcome {
  max-width: 760px;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.tab-list {
  display: flex;
  gap: 4px;
  max-width: 850px;
  margin: 28px 0;
  padding: 5px;
  background: var(--ivory-100);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.tab-list button {
  flex: 1;
  min-height: 44px;
  padding: 8px 14px;
  color: var(--muted);
  background: transparent;
  border: 0;
  border-radius: 8px;
  font-weight: 700;
  transition: color 180ms ease, background 180ms ease, box-shadow 180ms ease;
}

.tab-list button[aria-selected="true"] {
  color: var(--navy-900);
  background: var(--white);
  box-shadow: var(--shadow-sm);
}

.tab-panel {
  max-width: 850px;
}

.lesson-section {
  margin: 0 0 38px;
}

.lesson-section h2 {
  margin-bottom: 16px;
  color: var(--navy-900);
  font-size: 32px;
}

.lesson-section h3 {
  margin: 28px 0 12px;
  color: var(--navy-900);
  font-family: var(--font-body);
  font-size: 18px;
}

.lesson-section p,
.lesson-section li {
  color: #36445a;
}

.lesson-section ul,
.lesson-section ol {
  padding-left: 22px;
}

.lesson-section li + li {
  margin-top: 8px;
}

.callout,
.example,
.warning {
  margin: 22px 0;
  padding: 20px 22px;
  border-radius: 2px 14px 14px 14px;
}

.callout {
  background: #edf6f5;
  border-left: 4px solid var(--teal-600);
}

.example {
  background: var(--ivory-100);
  border-left: 4px solid var(--orange-500);
}

.warning {
  background: #fff0eb;
  border-left: 4px solid var(--red-700);
}

.callout strong,
.example strong,
.warning strong {
  display: block;
  margin-bottom: 6px;
}

.practice-card,
.quiz-card {
  padding: clamp(22px, 4vw, 34px);
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.practice-card h2,
.quiz-card h2 {
  margin-bottom: 10px;
  font-size: 32px;
}

.practice-card > p,
.quiz-card > p {
  color: var(--muted);
}

.field-label {
  display: block;
  margin: 22px 0 8px;
  font-weight: 700;
}

.search-input:focus,
.name-input:focus {
  border-color: var(--navy-800);
  outline: 0;
  box-shadow: 0 0 0 3px rgba(27, 41, 72, 0.14);
}

.checklist {
  display: grid;
  gap: 10px;
  margin: 26px 0;
  padding: 0;
  list-style: none;
}

.checklist li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.checklist svg {
  flex: 0 0 auto;
  width: 19px;
  margin-top: 3px;
  fill: none;
  stroke: var(--teal-600);
  stroke-width: 2;
}

.question {
  margin: 28px 0;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.question:first-of-type {
  padding-top: 0;
  border-top: 0;
}

.question legend {
  margin-bottom: 14px;
  font-weight: 700;
}

.answer-option {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  min-height: 44px;
  padding: 10px 12px;
  border-radius: 8px;
}

.answer-option:hover {
  background: var(--ivory-100);
}

.answer-option input {
  width: 18px;
  height: 18px;
  margin-top: 3px;
  accent-color: var(--navy-900);
}

.quiz-result {
  margin: 22px 0 0;
  padding: 16px 18px;
  border-radius: 10px;
  font-weight: 700;
}

.quiz-result.pass {
  color: #145b35;
  background: #e3f3e9;
}

.quiz-result.retry {
  color: #7d3029;
  background: #ffebe6;
}

.chapter-footer-nav {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  max-width: 850px;
  margin-top: 44px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.completion-banner {
  margin: 40px 0;
  padding: 28px;
  color: var(--white);
  background: var(--navy-900);
  border-radius: var(--radius-md);
}

.completion-banner h3 {
  margin-bottom: 8px;
  font-size: 28px;
}


.name-input,
.search-input,
.mobile-chapter-picker select {
  width: 100%;
  min-height: 46px;
  padding: 10px 12px;
  color: var(--ink);
  background: var(--white);
  border: 1px solid #c7c2b8;
  border-radius: 9px;
}

.resource-dialog {
  width: min(760px, calc(100% - 32px));
  max-height: min(760px, calc(100vh - 40px));
  padding: 0;
  color: var(--ink);
  background: var(--ivory-50);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: 0 30px 80px rgba(10, 18, 36, 0.3);
}

.auth-dialog {
  width: min(560px, calc(100% - 32px));
}

.completion-dialog {
  width: min(800px, calc(100% - 32px));
  max-height: min(900px, calc(100dvh - 32px));
  padding: 0;
  overflow: auto;
  color: var(--ink);
  background: var(--ivory-50);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: 0 30px 80px rgba(10, 18, 36, 0.3);
}

.completion-dialog::backdrop {
  background: rgba(10, 18, 36, 0.7);
  backdrop-filter: blur(3px);
}

.completion-dialog-header {
  background: linear-gradient(135deg, #fffdf6 0%, #f7eddf 100%);
}

.completion-dialog-body {
  padding: 10px 26px 28px;
}

.completion-dialog-body > p:first-child {
  max-width: 620px;
  margin: 0;
  color: var(--muted);
}

.input-help,
.field-error {
  margin: 8px 0 0;
  font-size: 13px;
}

.input-help {
  color: var(--muted);
}

.field-error {
  color: var(--red-700);
  font-weight: 700;
}

.certificate-preview {
  margin-top: 26px;
  padding: 10px;
  background: linear-gradient(135deg, #f4c75b 0%, var(--orange-500) 48%, #f4c75b 100%);
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
}

.certificate-preview-inner {
  position: relative;
  display: flex;
  aspect-ratio: 1.414 / 1;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: clamp(16px, 5vw, 48px);
  overflow: hidden;
  color: var(--navy-900);
  background: radial-gradient(circle at 50% 22%, #fff8de 0%, var(--ivory-50) 54%, #f7eddf 100%);
  border: 2px solid var(--navy-900);
  outline: 1px solid var(--ivory-200);
  outline-offset: -7px;
  text-align: center;
}

.certificate-seal {
  display: grid;
  width: clamp(30px, 6vw, 60px);
  height: clamp(30px, 6vw, 60px);
  place-items: center;
  margin-bottom: clamp(5px, 1vw, 12px);
  color: var(--navy-950);
  background: linear-gradient(135deg, #f8d98a, var(--orange-500));
  border: 2px solid var(--navy-900);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(244, 199, 91, 0.7);
  font-family: var(--font-display);
  font-size: clamp(20px, 4vw, 40px);
  font-weight: 700;
  line-height: 1;
}

.certificate-spark {
  position: absolute;
  width: clamp(13px, 2vw, 23px);
  height: clamp(13px, 2vw, 23px);
  background: var(--orange-500);
  clip-path: polygon(50% 0, 61% 38%, 100% 50%, 61% 62%, 50% 100%, 39% 62%, 0 50%, 39% 38%);
}

.certificate-spark-one { top: 13%; left: 12%; background: #f4c75b; }
.certificate-spark-two { top: 25%; right: 11%; background: var(--teal-600); transform: rotate(18deg); }
.certificate-spark-three { bottom: 17%; left: 10%; background: var(--orange-500); transform: rotate(-12deg); }
.certificate-spark-four { right: 13%; bottom: 18%; background: #f4c75b; transform: rotate(32deg); }

.certificate-preview p {
  position: relative;
  z-index: 1;
  margin: 0;
  color: var(--muted);
  font-size: clamp(8px, 1.6vw, 13px);
  font-weight: 700;
  letter-spacing: 0.25em;
  text-transform: uppercase;
}

.certificate-credential {
  position: relative;
  z-index: 1;
  display: block;
  margin-top: 3px;
  color: var(--teal-600);
  font-size: clamp(7px, 1.2vw, 11px);
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.certificate-rule {
  position: relative;
  z-index: 1;
  display: block;
  width: min(78%, 420px);
  height: 2px;
  margin: clamp(8px, 2vw, 16px) 0;
  background: var(--orange-500);
}

.certificate-preview h3 {
  position: relative;
  z-index: 1;
  font-size: clamp(20px, 4.6vw, 42px);
}

.certificate-presents {
  position: relative;
  z-index: 1;
  display: block;
  margin-top: clamp(11px, 2vw, 19px);
  color: var(--muted);
  font-size: clamp(8px, 1.7vw, 13px);
}

.certificate-preview strong {
  position: relative;
  z-index: 1;
  display: block;
  max-width: 100%;
  margin: clamp(9px, 2vw, 18px) 0 0;
  overflow-wrap: anywhere;
  color: var(--navy-900);
  font-family: var(--font-display);
  font-size: clamp(26px, 6vw, 56px);
  line-height: 1;
}

.certificate-preview em {
  position: relative;
  z-index: 1;
  margin-top: clamp(8px, 1.6vw, 16px);
  color: var(--navy-900);
  font-family: var(--font-display);
  font-size: clamp(16px, 3.2vw, 28px);
}

.certificate-preview small {
  position: relative;
  z-index: 1;
  margin-top: clamp(10px, 2vw, 18px);
  color: var(--muted);
  font-size: clamp(7px, 1.4vw, 12px);
}

.certificate-note {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.completion-actions {
  margin-top: 24px;
}

.confetti {
  position: absolute;
  z-index: 3;
  top: 0;
  right: 0;
  left: 0;
  height: 130px;
  overflow: hidden;
  pointer-events: none;
}

.confetti i {
  position: absolute;
  top: -14px;
  width: 9px;
  height: 16px;
  background: var(--orange-500);
  animation: confetti-fall 1.5s ease-out forwards;
}

.confetti i:nth-child(2n) { background: var(--teal-600); }
.confetti i:nth-child(3n) { background: #f1b947; }
.confetti i:nth-child(4n) { background: #a63d35; }
.confetti i:nth-child(1) { left: 6%; animation-delay: 20ms; }
.confetti i:nth-child(2) { left: 14%; animation-delay: 170ms; }
.confetti i:nth-child(3) { left: 23%; animation-delay: 80ms; }
.confetti i:nth-child(4) { left: 32%; animation-delay: 250ms; }
.confetti i:nth-child(5) { left: 41%; animation-delay: 120ms; }
.confetti i:nth-child(6) { left: 50%; animation-delay: 300ms; }
.confetti i:nth-child(7) { left: 59%; animation-delay: 40ms; }
.confetti i:nth-child(8) { left: 68%; animation-delay: 230ms; }
.confetti i:nth-child(9) { left: 76%; animation-delay: 130ms; }
.confetti i:nth-child(10) { left: 84%; animation-delay: 280ms; }
.confetti i:nth-child(11) { left: 91%; animation-delay: 60ms; }
.confetti i:nth-child(12) { left: 97%; animation-delay: 200ms; }

@keyframes confetti-fall {
  from { opacity: 0; transform: translateY(-12px) rotate(0deg); }
  20% { opacity: 1; }
  to { opacity: 0; transform: translateY(128px) rotate(290deg); }
}

.auth-form,
.account-summary {
  display: grid;
  gap: 12px;
  padding: 26px;
}

.auth-form > p,
.account-summary > p {
  margin: 0 0 6px;
  color: var(--muted);
}

.auth-note {
  margin-top: 4px !important;
  font-size: 13px;
}

.account-summary {
  padding-top: 28px;
}

#account-email {
  color: var(--ink);
  font-weight: 700;
}

.admin-hero {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 32px;
  padding: 58px max(20px, calc((100vw - var(--content-width)) / 2));
  color: var(--white);
  background: var(--navy-900);
}

.admin-hero h1 {
  font-size: clamp(44px, 6vw, 72px);
}

.admin-hero p:not(.eyebrow) {
  max-width: 650px;
  margin: 18px 0 0;
  color: #dce4f1;
}

.admin-section {
  padding-top: 36px;
}

.admin-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.admin-metrics > div {
  padding: 20px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.admin-metrics strong,
.admin-metrics span {
  display: block;
}

.admin-metrics strong {
  color: var(--navy-900);
  font-family: var(--font-display);
  font-size: 42px;
  line-height: 1;
}

.admin-metrics span {
  margin-top: 8px;
  color: var(--muted);
  font-size: 14px;
}

.admin-table-wrap {
  overflow-x: auto;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.admin-table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
  text-align: left;
}

.admin-table th,
.admin-table td {
  padding: 15px 18px;
  border-bottom: 1px solid var(--border);
}

.admin-table th {
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.admin-table tr:last-child td {
  border-bottom: 0;
}

.admin-loading {
  padding: 32px;
  color: var(--muted);
  text-align: center;
}

.resource-dialog::backdrop {
  background: rgba(10, 18, 36, 0.66);
  backdrop-filter: blur(3px);
}

.dialog-header {
  position: sticky;
  z-index: 2;
  top: 0;
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 24px;
  padding: 24px 26px 18px;
  background: var(--ivory-50);
  border-bottom: 1px solid var(--border);
}

.dialog-header h2 {
  font-size: 36px;
}

.icon-button {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border-radius: 50%;
}

.icon-button:hover {
  background: var(--ivory-200);
}

.icon-button svg {
  width: 22px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-width: 2;
}

.search-label {
  display: block;
  margin: 22px 26px 8px;
  font-weight: 700;
}

.search-input {
  width: calc(100% - 52px);
  margin: 0 26px 20px;
}

.resource-list {
  display: grid;
  gap: 10px;
  padding: 0 26px 28px;
}

.resource-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 14px;
  align-items: center;
  padding: 15px 16px;
  color: var(--ink);
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 10px;
  text-decoration: none;
  transition: border-color 180ms ease, transform 180ms ease;
}

.resource-item:hover {
  border-color: var(--orange-500);
  transform: translateY(-1px);
}

.resource-item strong,
.resource-item small {
  display: block;
}

.resource-item small {
  color: var(--muted);
}

.external-icon {
  width: 18px;
  fill: none;
  stroke: var(--orange-600);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.empty-state {
  padding: 28px;
  color: var(--muted);
  text-align: center;
}

.toast {
  position: fixed;
  z-index: 80;
  right: 22px;
  bottom: 22px;
  max-width: 340px;
  padding: 12px 16px;
  color: var(--white);
  background: var(--navy-900);
  border-radius: 10px;
  box-shadow: var(--shadow-md);
  opacity: 0;
  transform: translateY(14px);
  pointer-events: none;
  transition: opacity 180ms ease, transform 180ms ease;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 28px max(20px, calc((100vw - var(--content-width)) / 2));
  color: #bfc9da;
  background: var(--navy-950);
  font-size: 13px;
}

.site-footer p {
  margin: 0;
}

.header-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 10px;
  text-decoration: none;
}

.email-lab-shell {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

.lab-stage-nav {
  position: sticky;
  top: 98px;
  padding: 18px;
  background: var(--ivory-100);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.lab-progress-copy strong,
.lab-progress-copy span {
  display: block;
}

.lab-progress-copy span {
  margin-top: 3px;
  color: var(--muted);
  font-size: 12px;
}

.lab-stage-nav nav {
  display: grid;
  gap: 7px;
  margin-top: 16px;
}

.lab-stage-nav nav button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  min-height: 46px;
  padding: 9px 10px;
  color: var(--ink);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 9px;
  text-align: left;
  transition: background 180ms ease, border-color 180ms ease;
}

.lab-stage-nav nav button:hover:not(:disabled) {
  background: var(--white);
  border-color: var(--border);
}

.lab-stage-nav nav button.active {
  background: var(--white);
  border-color: var(--orange-500);
  box-shadow: var(--shadow-sm);
}

.lab-stage-nav nav button:disabled {
  color: #8b93a0;
  cursor: not-allowed;
}

.lab-stage-nav nav small {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 11px;
}

.lab-workspace {
  min-width: 0;
  padding: clamp(22px, 4vw, 34px);
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.lab-heading,
.results-header,
.review-section-heading {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 24px;
}

.lab-heading h2,
.review-section-heading h2,
.results-header h2,
.review-rules h2 {
  font-size: clamp(30px, 4vw, 42px);
}

.scenario-card {
  margin: 24px 0;
  padding: 18px 20px;
  background: #edf6f5;
  border: 1px solid #b8d9d5;
  border-radius: 12px;
}

.scenario-card strong,
.scenario-card p {
  display: block;
  margin: 0;
}

.scenario-card p {
  margin-top: 6px;
  color: #315b58;
}

.assessment-form textarea,
.review-form textarea,
.review-form input[type="text"] {
  width: 100%;
  min-height: 46px;
  padding: 12px 14px;
  color: var(--ink);
  background: var(--white);
  border: 1px solid #b9b4aa;
  border-radius: 9px;
  resize: vertical;
}

.assessment-form textarea:focus,
.review-form textarea:focus,
.review-form input:focus {
  border-color: var(--navy-800);
  outline: 0;
  box-shadow: 0 0 0 3px rgba(27, 41, 72, 0.14);
}

.textarea-meta {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin: 8px 0 20px;
  color: var(--muted);
  font-size: 12px;
}

.inline-status {
  align-self: center;
  color: var(--muted);
  font-size: 13px;
}

.evaluation-card {
  display: grid;
  grid-template-columns: 100px minmax(0, 1fr);
  gap: 22px;
  margin-top: 28px;
  padding: 22px;
  background: var(--ivory-100);
  border: 1px solid var(--border);
  border-left: 5px solid var(--red-700);
  border-radius: 12px;
}

.evaluation-card.pass {
  border-left-color: var(--green-700);
}

.evaluation-card h3 {
  font-family: var(--font-body);
  font-size: 20px;
}

.evaluation-card p {
  margin: 8px 0;
  color: var(--muted);
}

.evaluation-card small,
.email-result-body > small {
  display: block;
  margin-top: 14px;
  color: var(--muted);
}

.evaluation-score {
  text-align: center;
}

.evaluation-score strong,
.evaluation-score span {
  display: block;
}

.evaluation-score strong {
  color: var(--navy-900);
  font-family: var(--font-display);
  font-size: 52px;
  line-height: 1;
}

.evaluation-score span {
  color: var(--muted);
  font-size: 12px;
}

.score-dimensions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 16px;
  margin: 18px 0 0;
}

.score-dimensions div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}

.score-dimensions dt,
.score-dimensions dd {
  margin: 0;
  font-size: 13px;
}

.score-dimensions dd {
  font-weight: 700;
}

.issue-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 16px;
}

.issue-chip-row span {
  padding: 4px 8px;
  color: #713029;
  background: #ffebe6;
  border-radius: 99px;
  font-size: 11px;
  font-weight: 700;
}

.lab-boundary {
  margin-top: 24px;
  padding: 16px 18px;
  color: #37455c;
  background: var(--ivory-100);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.lab-boundary p {
  margin: 3px 0 0;
}

.review-gate {
  max-width: 760px;
  min-height: 560px;
  margin: 0 auto;
  padding: 90px 24px;
  text-align: center;
}

.review-gate h1,
.review-hero h1 {
  font-size: clamp(48px, 7vw, 78px);
}

.review-gate p {
  max-width: 580px;
  margin: 16px auto 28px;
  color: var(--muted);
}

.review-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  gap: 48px;
  align-items: end;
  padding: 64px max(20px, calc((100vw - var(--content-width)) / 2));
  color: var(--white);
  background: var(--navy-900);
}

.review-hero p:not(.eyebrow) {
  max-width: 720px;
  color: #dce4f1;
  font-size: 18px;
}

.review-hero-stat {
  padding: 20px;
  color: var(--navy-900);
  background: var(--orange-500);
  border-radius: var(--radius-md);
}

.review-hero-stat strong,
.review-hero-stat span,
.review-hero-stat small {
  display: block;
}

.review-hero-stat strong {
  font-family: var(--font-display);
  font-size: 54px;
  line-height: 1;
}

.review-hero-stat span {
  margin-top: 5px;
  font-weight: 700;
}

.review-layout,
.review-results,
.recent-reviews,
.review-unlock {
  width: min(var(--content-width), calc(100% - 40px));
  margin-inline: auto;
}

.review-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 290px;
  gap: 28px;
  align-items: start;
  padding-block: 54px;
}

.review-form,
.review-rules {
  padding: clamp(22px, 4vw, 34px);
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.review-rules {
  position: sticky;
  top: 98px;
}

.review-rules ol {
  padding-left: 22px;
}

.review-rules li + li {
  margin-top: 6px;
}

.review-section-heading > span {
  color: var(--muted);
  font-size: 12px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 24px;
}

.form-grid label,
.form-grid label > span {
  display: block;
}

.form-grid label > span {
  margin-bottom: 6px;
  font-weight: 700;
}

.upload-heading {
  margin-top: 42px;
  padding-top: 30px;
  border-top: 1px solid var(--border);
}

.file-drop {
  display: grid;
  min-height: 150px;
  place-items: center;
  margin-top: 20px;
  padding: 28px;
  background: var(--ivory-100);
  border: 2px dashed #aaa397;
  border-radius: 12px;
  text-align: center;
  transition: border-color 180ms ease, background 180ms ease;
}

.file-drop:hover,
.file-drop:focus-within {
  background: #fff7ed;
  border-color: var(--orange-500);
}

.file-drop span,
.file-drop input {
  display: block;
  margin-top: 8px;
  color: var(--muted);
}

.review-submit-row {
  margin-top: 24px;
}

.batch-progress {
  margin-top: 24px;
  padding: 16px;
  background: var(--ivory-100);
  border-radius: 10px;
}

.batch-progress > div:first-child {
  display: flex;
  justify-content: space-between;
  gap: 16px;
}

.review-results {
  padding: 20px 0 62px;
}

.result-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 26px 0;
}

.result-metrics > div {
  padding: 20px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.result-metrics strong,
.result-metrics span {
  display: block;
}

.result-metrics strong {
  color: var(--navy-900);
  font-family: var(--font-display);
  font-size: 42px;
  line-height: 1;
}

.result-metrics span {
  margin-top: 6px;
  color: var(--muted);
}

.issue-summary {
  margin-bottom: 24px;
  padding: 22px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.issue-summary > div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}

.issue-summary > div:last-child {
  border-bottom: 0;
}

.email-result-list {
  display: grid;
  gap: 9px;
}

.email-result-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.email-result-card.stop {
  border-left: 5px solid var(--red-700);
}

.email-result-card summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 58px;
  padding: 12px 16px;
  list-style: none;
}

.email-result-card summary::-webkit-details-marker {
  display: none;
}

.email-result-card summary span:first-child strong,
.email-result-card summary span:first-child small {
  display: block;
}

.email-result-card summary small {
  color: var(--muted);
}

.result-score {
  color: var(--navy-900);
  font-weight: 700;
}

.email-result-body {
  padding: 0 16px 18px;
  border-top: 1px solid var(--border);
}

.recent-reviews {
  padding-block: 12px 72px;
}

.recent-review-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.recent-review-grid button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-height: 76px;
  padding: 15px;
  color: var(--ink);
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 10px;
  text-align: left;
  transition: border-color 180ms ease, transform 180ms ease;
}

.recent-review-grid button:hover {
  border-color: var(--orange-500);
  transform: translateY(-1px);
}

.recent-review-grid strong,
.recent-review-grid small {
  display: block;
}

.recent-review-grid small {
  color: var(--muted);
}

.review-unlock {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
  margin-block: 36px;
  padding: 30px;
  color: var(--white);
  background: var(--teal-600);
  border-radius: var(--radius-md);
}

.review-unlock h2 {
  color: var(--white);
}

.review-unlock p:not(.eyebrow) {
  margin: 8px 0 0;
  color: #e8f5f4;
}

@media (max-width: 980px) {
  .hero-inner,
  .formula-card {
    grid-template-columns: 1fr;
  }

  .hero-note {
    max-width: 480px;
  }

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

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

  .principles-grid > div:first-child {
    grid-column: 1 / -1;
  }

  .course-shell {
    grid-template-columns: 1fr;
  }

  .course-sidebar {
    display: none;
  }

  .mobile-chapter-picker {
    display: block;
    max-width: 850px;
    margin-bottom: 26px;
  }

  .email-lab-shell,
  .review-layout {
    grid-template-columns: 1fr;
  }

  .lab-stage-nav,
  .review-rules {
    position: static;
  }

  .lab-stage-nav nav {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (max-width: 680px) {
  .site-header {
    min-height: 66px;
    padding-inline: 14px;
  }

  .brand small,
  .header-progress span:first-child,
  .text-button {
    display: none;
  }

  .header-actions,
  .header-progress {
    gap: 8px;
  }

  .mini-progress {
    width: 74px;
  }

  .admin-hero {
    align-items: start;
    flex-direction: column;
    padding: 42px 18px;
  }

  .admin-metrics {
    grid-template-columns: 1fr;
  }

  .hero-inner {
    gap: 36px;
    padding: 54px 18px 58px;
  }

  h1 {
    font-size: 48px;
  }

  .home-section {
    padding: 52px 18px;
  }

  .section-heading {
    display: block;
  }

  .section-heading p {
    margin-top: 12px;
  }

  .chapter-grid,
  .principles-grid {
    grid-template-columns: 1fr;
  }

  .principles-grid > div:first-child {
    grid-column: auto;
  }

  .formula-card {
    padding: 26px;
  }

  .completion-callout {
    align-items: start;
    flex-direction: column;
    gap: 20px;
  }

  .completion-dialog-body {
    padding: 8px 18px 22px;
  }

  .completion-dialog .dialog-header {
    padding: 20px 18px 16px;
  }

  .completion-actions .primary-button,
  .completion-actions .quiet-button {
    width: 100%;
  }

  .course-main {
    padding: 28px 18px 64px;
  }

  .chapter-header h1 {
    font-size: 43px;
  }

  .tab-list {
    overflow-x: auto;
  }

  .tab-list button {
    min-width: 98px;
  }

  .chapter-footer-nav,
  .site-footer {
    flex-direction: column;
  }

  .email-lab-shell {
    gap: 16px;
  }

  .lab-stage-nav nav,
  .form-grid,
  .score-dimensions,
  .result-metrics,
  .recent-review-grid {
    grid-template-columns: 1fr;
  }

  .lab-heading,
  .results-header,
  .review-section-heading,
  .review-unlock {
    align-items: stretch;
    flex-direction: column;
  }

  .evaluation-card {
    grid-template-columns: 1fr;
  }

  .evaluation-score {
    text-align: left;
  }

  .evaluation-score strong,
  .evaluation-score span {
    display: inline;
  }

  .review-hero {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 44px 18px;
  }

  .review-hero-stat {
    max-width: 240px;
  }

  .review-layout,
  .review-results,
  .recent-reviews,
  .review-unlock {
    width: calc(100% - 36px);
  }

  .results-header .button-row,
  .review-submit-row {
    align-items: stretch;
    flex-direction: column;
  }

  .results-header .button-row button,
  .review-submit-row button {
    width: 100%;
  }

  .site-footer {
    padding-inline: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

  .confetti i {
    opacity: 0;
    animation: none;
  }
}

@media print {
  .site-header,
  .course-sidebar,
  .tab-list,
  .chapter-footer-nav,
  .site-footer,
  .resource-dialog,
  .toast {
    display: none !important;
  }

  .course-shell,
  .formula-card {
    display: block;
  }

  .course-main {
    padding: 0;
  }

  body {
    background: white;
  }
}