:root {
  color-scheme: light;
  --bg: #f2f6fa;
  --surface: #ffffff;
  --surface-soft: #eef4f8;
  --surface-strong: #f8fbfd;
  --text: #141c27;
  --muted: #637082;
  --border: #d7e1ea;
  --border-strong: #c4d2df;
  --navy: #111827;
  --navy-soft: #1b2737;
  --cyan: #0ea5c6;
  --blue: #2065b3;
  --blue-soft: #e7f3fb;
  --green: #127452;
  --green-soft: #e4f6ed;
  --amber: #a15c07;
  --amber-soft: #fff3da;
  --red: #b4232c;
  --red-soft: #fde8e8;
  --shadow: 0 18px 42px rgba(20, 31, 45, 0.08);
  --shadow-hover: 0 24px 54px rgba(20, 31, 45, 0.14);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(14, 165, 198, 0.13), transparent 34rem),
    linear-gradient(180deg, #f8fbfd 0%, var(--bg) 32rem);
}

button,
input {
  font: inherit;
}

button {
  cursor: pointer;
}

a {
  color: inherit;
}

:focus-visible {
  outline: 3px solid rgba(24, 167, 201, 0.55);
  outline-offset: 3px;
}

.app-shell {
  display: grid;
  grid-template-columns: 292px minmax(0, 1fr);
  min-width: 0;
  min-height: 100vh;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 24px 18px;
  border-right: 1px solid rgba(255, 255, 255, 0.08);
  color: #f8fafc;
  background:
    linear-gradient(180deg, rgba(14, 165, 198, 0.2), rgba(14, 165, 198, 0) 36%),
    linear-gradient(135deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0) 32%),
    var(--navy);
  box-shadow: inset -1px 0 rgba(15, 23, 42, 0.45);
}

.brand {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 13px;
  align-items: center;
  margin-bottom: 32px;
  text-decoration: none;
}

.brand-mark {
  position: relative;
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.26);
  border-radius: 12px;
  color: transparent;
  background: linear-gradient(135deg, #67e8f9, #22c55e);
  box-shadow: 0 14px 28px rgba(14, 165, 198, 0.22);
  font-size: 0;
  font-weight: 800;
}

.brand-mark::before {
  content: "";
  position: absolute;
  width: 21px;
  height: 25px;
  border: 3px solid #05252d;
  border-radius: 11px 11px 9px 9px;
  clip-path: polygon(50% 0, 100% 19%, 88% 83%, 50% 100%, 12% 83%, 0 19%);
}

.brand-mark::after {
  content: "";
  position: absolute;
  width: 8px;
  height: 13px;
  border-right: 3px solid #05252d;
  border-bottom: 3px solid #05252d;
  transform: translateY(-1px) rotate(42deg);
}

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

.brand strong {
  line-height: 1.2;
  letter-spacing: 0;
}

.brand small {
  margin-top: 3px;
  color: #b9c8d9;
  font-size: 0.8rem;
}

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

.nav-links a {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 42px;
  padding: 10px 12px;
  border-radius: 10px;
  color: #c8d3df;
  text-decoration: none;
  font-weight: 650;
  transition:
    color 160ms ease,
    background 160ms ease,
    transform 160ms ease;
}

.nav-links a::before {
  content: "";
  display: grid;
  width: 24px;
  height: 24px;
  place-items: center;
  border-radius: 7px;
  background: rgba(255, 255, 255, 0.78);
}

.nav-links a[data-route="training"]::before {
  background:
    linear-gradient(#09202a, #09202a) 7px 7px / 10px 2px no-repeat,
    linear-gradient(#09202a, #09202a) 7px 11px / 10px 2px no-repeat,
    linear-gradient(#09202a, #09202a) 7px 15px / 7px 2px no-repeat,
    rgba(255, 255, 255, 0.78);
}

.nav-links a[data-route="progress"]::before {
  background:
    conic-gradient(#09202a 0 230deg, transparent 230deg),
    rgba(255, 255, 255, 0.78);
  border: 6px solid rgba(255, 255, 255, 0.78);
}

.nav-links a[data-route="resources"]::before {
  background:
    radial-gradient(circle at 50% 66%, #09202a 0 2px, transparent 2.5px),
    linear-gradient(#09202a, #09202a) 50% 38% / 3px 8px no-repeat,
    radial-gradient(circle at 50% 34%, transparent 0 4px, #09202a 4.5px 6px, transparent 6.5px),
    rgba(255, 255, 255, 0.78);
}

.nav-links a.active,
.nav-links a:hover {
  color: #ffffff;
  background: rgba(14, 165, 198, 0.18);
}

.nav-links a:hover {
  transform: translateX(2px);
}

[dir="rtl"] .nav-links a:hover {
  transform: translateX(-2px);
}

.language-toggle {
  width: 100%;
  min-height: 40px;
  margin-top: 22px;
  padding: 8px 12px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 10px;
  color: #ffffff;
  background: rgba(255, 255, 255, 0.08);
  font-weight: 800;
  transition:
    border-color 160ms ease,
    background 160ms ease;
}

.language-toggle:hover {
  background: rgba(255, 255, 255, 0.14);
}

.main-content {
  width: 100%;
  min-width: 0;
  max-width: 1200px;
  padding: 42px 38px;
}

.page-header {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 30px;
}

.page-header > div,
.summary-panel,
.lesson-panel,
.scenario-panel,
.quiz-panel,
.completion-panel,
.module-card,
.resource-item,
.progress-row {
  min-width: 0;
}

.eyebrow {
  margin: 0 0 8px;
  color: #0b7892;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
  overflow-wrap: anywhere;
}

h1 {
  max-width: 780px;
  margin-bottom: 10px;
  font-size: 2.35rem;
  line-height: 1.08;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 12px;
  font-size: 1.35rem;
  line-height: 1.2;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 8px;
  font-size: 1rem;
  line-height: 1.25;
  letter-spacing: 0;
}

p {
  color: var(--muted);
  line-height: 1.62;
}

.page-header p {
  max-width: 680px;
  margin-bottom: 0;
}

.summary-panel,
.module-card,
.resource-item,
.lesson-panel,
.scenario-panel,
.quiz-panel,
.completion-panel,
.submission-panel,
.progress-row {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.summary-panel {
  min-width: 230px;
  padding: 18px;
  border-color: rgba(14, 165, 198, 0.24);
  background:
    linear-gradient(135deg, rgba(14, 165, 198, 0.1), rgba(34, 197, 94, 0.08)),
    var(--surface);
}

.summary-number {
  display: block;
  margin-bottom: 6px;
  color: #0d3140;
  font-size: 2.05rem;
  font-weight: 850;
}

.progress-track {
  overflow: hidden;
  height: 10px;
  border-radius: 999px;
  background: #e4ebf2;
  box-shadow: inset 0 1px 2px rgba(15, 23, 42, 0.12);
}

[dir="rtl"] .progress-track {
  direction: rtl;
}

.progress-fill {
  width: var(--progress, 0%);
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #12b8c8, #2563eb, #22c55e);
  transition: width 260ms ease;
}

.module-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.module-card {
  position: relative;
  display: grid;
  overflow: hidden;
  min-height: 278px;
  padding: 22px;
  border-color: rgba(196, 210, 223, 0.9);
  transition:
    border-color 180ms ease,
    box-shadow 180ms ease,
    transform 180ms ease;
}

.module-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 5px;
  background: linear-gradient(90deg, var(--module-accent), rgba(255, 255, 255, 0));
}

.module-card::after {
  content: "";
  position: absolute;
  top: -52px;
  right: -54px;
  width: 132px;
  height: 132px;
  border-radius: 50%;
  background: var(--module-accent-soft);
  opacity: 0.88;
}

[dir="rtl"] .module-card::after {
  right: auto;
  left: -54px;
}

.module-card:hover {
  border-color: color-mix(in srgb, var(--module-accent) 48%, var(--border));
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}

.module-card > * {
  position: relative;
  z-index: 1;
}

.module-icon {
  display: grid;
  width: 46px;
  height: 46px;
  margin-bottom: 18px;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--module-accent) 30%, transparent);
  border-radius: 12px;
  color: color-mix(in srgb, var(--module-accent) 72%, #111827);
  background: var(--module-accent-soft);
  font-size: 0.8rem;
  font-weight: 950;
  box-shadow: 0 12px 28px color-mix(in srgb, var(--module-accent) 12%, transparent);
}

.module-card p {
  margin-bottom: 16px;
}

.module-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin: 4px 0 18px;
}

.status-pill,
.duration-pill,
.score-pill {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 5px 9px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 800;
}

.status-pill.not-started {
  color: var(--muted);
  background: var(--surface-soft);
}

.status-pill.in-progress {
  color: var(--amber);
  background: var(--amber-soft);
}

.status-pill.complete {
  color: var(--green);
  background: var(--green-soft);
}

.duration-pill,
.score-pill {
  color: #33506f;
  background: #eef3f8;
}

.card-actions {
  display: flex;
  gap: 10px;
  align-items: end;
  align-self: end;
  margin-top: 22px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 10px 15px;
  border: 1px solid transparent;
  border-radius: 10px;
  color: #ffffff;
  background: linear-gradient(135deg, var(--blue), #0e9fbe);
  box-shadow: 0 10px 22px rgba(32, 101, 179, 0.2);
  text-decoration: none;
  font-weight: 800;
  transition:
    box-shadow 160ms ease,
    transform 160ms ease,
    background 160ms ease;
}

.button:hover {
  background: linear-gradient(135deg, #18549f, #0a8aa6);
  box-shadow: 0 14px 28px rgba(32, 101, 179, 0.26);
  transform: translateY(-1px);
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.button.secondary {
  color: var(--text);
  border-color: var(--border);
  background: #ffffff;
  box-shadow: none;
}

.button.secondary:hover {
  background: var(--surface-soft);
  box-shadow: none;
}

.button.danger {
  color: #ffffff;
  background: linear-gradient(135deg, var(--red), #d23b45);
}

.button.danger:hover {
  background: #8f1d25;
}

.lesson-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 24px;
  align-items: start;
}

.lesson-panel,
.scenario-panel,
.quiz-panel,
.completion-panel {
  padding: 24px;
}

.lesson-panel > .scenario-panel {
  margin-top: 22px;
  background: linear-gradient(180deg, #ffffff, #f8fbfd);
}

.step-list {
  display: grid;
  gap: 9px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.step-list li {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  color: var(--muted);
  font-size: 0.9rem;
}

.step-index {
  display: grid;
  width: 26px;
  height: 26px;
  place-items: center;
  border-radius: 999px;
  background: #e8edf3;
  font-size: 0.78rem;
  font-weight: 800;
  transition:
    color 160ms ease,
    background 160ms ease;
}

.step-list li.active {
  color: var(--blue);
  font-weight: 800;
}

.step-list li.active .step-index {
  color: #ffffff;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
}

.step-list li.done .step-index {
  color: #ffffff;
  background: var(--green);
}

.workplace-example {
  margin: 22px 0;
  overflow: hidden;
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  background: #f8fbfd;
  box-shadow: 0 14px 32px rgba(20, 31, 45, 0.07);
}

.example-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 42px;
  padding: 10px 14px;
  border-bottom: 1px solid #dce3eb;
  color: #d9f5fb;
  background: linear-gradient(135deg, var(--navy-soft), #223348);
  font-size: 0.86rem;
  font-weight: 800;
}

.example-type {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.example-type::before {
  content: "";
  display: inline-block;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow:
    16px 0 #f59e0b,
    32px 0 #ef4444;
}

.example-title {
  color: #ffffff;
  text-align: end;
}

.example-body {
  padding: 18px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.8), rgba(248, 251, 253, 0.95)),
    #f8fbfd;
}

.example-body dl {
  display: grid;
  grid-template-columns: minmax(86px, 0.34fr) minmax(0, 1fr);
  gap: 0;
  margin: 0;
  overflow: hidden;
  border: 1px solid #dbe5ee;
  border-radius: 10px;
  background: #ffffff;
}

.example-body dt {
  padding: 10px 12px;
  border-bottom: 1px solid #e6edf3;
  color: #58677a;
  background: #f3f7fa;
  font-weight: 800;
}

.example-body dd {
  margin: 0;
  padding: 10px 12px;
  border-bottom: 1px solid #e6edf3;
  overflow-wrap: anywhere;
}

.example-body dt:nth-last-child(2),
.example-body dd:last-child {
  border-bottom: 0;
}

.example-mail .example-body,
.example-alert .example-body {
  background: #eef6fb;
}

.example-sheet .example-body dl {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.92rem;
}

.example-sheet .example-body dt {
  background: #e7f7f2;
}

.example-chat .example-body {
  background: linear-gradient(180deg, #eef5ff, #f8fbfd);
}

.example-auth .example-body dl {
  border-color: #d8d5fb;
}

.example-share .example-body dl {
  border-color: #cbe7df;
}

.question-options {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}

.option-button {
  position: relative;
  width: 100%;
  min-height: 52px;
  padding: 13px 46px 13px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  background: #ffffff;
  text-align: left;
  font-weight: 700;
  transition:
    border-color 160ms ease,
    background 160ms ease,
    box-shadow 160ms ease,
    transform 160ms ease;
}

[dir="rtl"] .option-button {
  padding: 13px 14px 13px 46px;
  text-align: right;
}

[dir="rtl"] .sidebar {
  border-right: 0;
  border-left: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: inset 1px 0 rgba(15, 23, 42, 0.45);
}

[dir="rtl"] .resource-item ul,
[dir="rtl"] .completion-panel ul {
  padding-right: 22px;
  padding-left: 0;
}

[dir="rtl"] .eyebrow {
  letter-spacing: 0;
}

.option-button:hover,
.option-button.selected {
  border-color: var(--cyan);
  background: var(--blue-soft);
  box-shadow: 0 10px 24px rgba(14, 165, 198, 0.1);
  transform: translateY(-1px);
}

.option-button.correct {
  border-color: #80c6a5;
  background: var(--green-soft);
}

.option-button.incorrect {
  border-color: #e4aaaa;
  background: var(--red-soft);
}

.option-button::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 14px;
  display: grid;
  width: 23px;
  height: 23px;
  place-items: center;
  border: 1px solid #c8d5e0;
  border-radius: 50%;
  color: #ffffff;
  transform: translateY(-50%);
}

[dir="rtl"] .option-button::after {
  right: auto;
  left: 14px;
}

.option-button.correct::after {
  content: "✓";
  border-color: var(--green);
  background: var(--green);
  font-size: 0.84rem;
  font-weight: 900;
}

.option-button.incorrect::after {
  content: "!";
  border-color: var(--red);
  background: var(--red);
  font-size: 0.84rem;
  font-weight: 900;
}

.feedback {
  margin-top: 16px;
  padding: 14px;
  border-radius: 10px;
  border: 1px solid transparent;
}

.feedback.correct {
  border-color: #a8dbc2;
  color: #0d4f35;
  background: var(--green-soft);
}

.feedback.incorrect {
  border-color: #efb6b6;
  color: #842020;
  background: var(--red-soft);
}

.lesson-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.resource-grid,
.progress-list {
  display: grid;
  gap: 14px;
}

.submission-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 420px);
  gap: 22px;
  align-items: center;
  margin-top: 22px;
  padding: 22px;
  border-color: rgba(18, 116, 82, 0.28);
  background:
    linear-gradient(135deg, rgba(18, 116, 82, 0.08), rgba(14, 165, 198, 0.08)),
    var(--surface);
}

.submission-panel p {
  margin-bottom: 0;
}

.submission-form {
  display: grid;
  gap: 9px;
}

.submission-form label {
  color: var(--text);
  font-weight: 800;
}

.submission-controls {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
}

.submission-controls input {
  width: 100%;
  min-height: 42px;
  padding: 10px 12px;
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  color: var(--text);
  background: #ffffff;
}

.submission-controls input:disabled {
  color: var(--muted);
  background: var(--surface-soft);
}

.submission-controls input[aria-invalid="true"] {
  border-color: var(--red);
  background: var(--red-soft);
}

.field-hint,
.submission-status {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.submission-status {
  min-height: 1.45em;
  font-weight: 800;
}

.submission-status.success {
  color: var(--green);
}

.submission-status.error {
  color: var(--red);
}

.reset-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  margin-top: 18px;
  padding: 18px;
  border: 1px solid #e7c2c5;
  border-radius: 8px;
  background: #fff8f8;
}

.resource-item,
.progress-row {
  padding: 20px;
}

.resource-item ul,
.completion-panel ul {
  margin: 10px 0 0;
  padding-left: 22px;
  color: var(--muted);
  line-height: 1.7;
}

.resource-item {
  position: relative;
  overflow: hidden;
}

.resource-item::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 5px;
  background: linear-gradient(180deg, var(--cyan), #22c55e);
}

[dir="rtl"] .resource-item::before {
  inset: 0 0 0 auto;
}

.progress-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
}

.empty-state {
  padding: 28px;
  border: 1px dashed var(--border);
  border-radius: 10px;
  color: var(--muted);
  background: #ffffff;
}

@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;
  }
}

@media (max-width: 940px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    height: auto;
    padding: 14px 18px;
  }

  .brand {
    margin-bottom: 14px;
  }

  .nav-links {
    display: flex;
    overflow-x: auto;
    padding-bottom: 4px;
  }

  .language-toggle {
    margin-top: 10px;
  }

  .nav-links a {
    white-space: nowrap;
  }

  .main-content {
    padding: 26px 18px 38px;
  }

  .page-header,
  .lesson-layout {
    grid-template-columns: 1fr;
  }

  .page-header {
    display: grid;
  }

  .summary-panel {
    min-width: 0;
  }

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

@media (max-width: 760px) {
  .module-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .brand {
    grid-template-columns: 38px minmax(0, 1fr);
  }

  .brand-mark {
    width: 38px;
    height: 38px;
  }

  h1 {
    font-size: 2rem;
  }

  .lesson-panel,
  .scenario-panel,
  .quiz-panel,
  .completion-panel,
  .module-card,
  .summary-panel {
    padding: 16px;
  }

  .progress-row {
    grid-template-columns: 1fr;
  }

  .submission-panel,
  .submission-controls {
    grid-template-columns: 1fr;
  }

  .reset-panel {
    grid-template-columns: 1fr;
  }

  .example-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .example-title {
    text-align: start;
  }

  .example-body dl {
    grid-template-columns: 1fr;
  }

  .example-body dt {
    border-bottom: 0;
  }
}