:root {
  --bg: #090f1a;
  --bg-2: #0f1726;
  --panel: #131d2d;
  --panel-2: #19253a;
  --panel-3: #1f2d46;
  --text: #e9f0ff;
  --muted: #9fb0cf;
  --brand: #4da3ff;
  --brand-2: #5eead4;
  --ok: #4ade80;
  --warn: #f59e0b;
  --error: #fb7185;
  --border: #2a3a57;
  --shadow: 0 16px 36px rgba(2, 8, 24, 0.55);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "Noto Sans", sans-serif;
  background:
    radial-gradient(circle at 12% 8%, rgba(77, 163, 255, 0.14), transparent 26%),
    radial-gradient(circle at 90% 5%, rgba(94, 234, 212, 0.12), transparent 28%),
    linear-gradient(160deg, var(--bg), #060b14);
  color: var(--text);
}

h1,
h2,
h3,
h4,
p {
  margin-top: 0;
}

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

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--brand);
}

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 2rem;
}

.login-card {
  width: min(480px, 100%);
  background: linear-gradient(160deg, var(--panel), var(--panel-2));
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 2rem;
  box-shadow: var(--shadow);
}

.login-form {
  display: grid;
  gap: 1rem;
}

label {
  display: grid;
  gap: 0.45rem;
  font-size: 0.9rem;
  font-weight: 600;
}

input,
textarea,
button {
  font: inherit;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--panel-2);
  color: var(--text);
  padding: 0.7rem 0.85rem;
}

input::placeholder,
textarea::placeholder {
  color: #8ea0c2;
}

textarea {
  min-height: 120px;
  resize: vertical;
}

button {
  border: 0;
  border-radius: 10px;
  padding: 0.75rem 1rem;
  font-weight: 700;
  background: linear-gradient(120deg, var(--brand), #2d7dd2);
  color: #061124;
  cursor: pointer;
}

button.secondary {
  background: #273755;
  color: var(--text);
  border: 1px solid var(--border);
}

.alert {
  margin-bottom: 1rem;
  background: rgba(251, 113, 133, 0.15);
  color: #ffb7c5;
  border: 1px solid rgba(251, 113, 133, 0.4);
  border-radius: 10px;
  padding: 0.7rem 0.9rem;
}

.hint {
  margin-top: 1rem;
  border: 1px dashed var(--border);
  border-radius: 10px;
  padding: 0.7rem 0.9rem;
  color: var(--muted);
}

.app-layout {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.sidebar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 1rem;
  background: rgba(8, 13, 23, 0.96);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
}

.brand h2 {
  margin: 0;
  font-size: 1.08rem;
}

.sidebar nav {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: center;
}

.nav-btn {
  background: #1b2940;
  color: var(--text);
  border: 1px solid var(--border);
  text-align: left;
  padding: 0.55rem 0.8rem;
}

.nav-btn.active {
  background: linear-gradient(120deg, #335f93, #2b4f7a);
  color: #f1f6ff;
}

.logout {
  color: #dff3ff;
  text-decoration: none;
  background: #1c2c45;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.55rem 0.9rem;
  text-align: center;
  white-space: nowrap;
}

.main-content {
  padding: 1.2rem;
  max-width: 1700px;
  width: 100%;
  margin: 0 auto;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: start;
  margin-bottom: 1.1rem;
}

.badge {
  background: #1f3351;
  color: #b5d3ff;
  border: 1px solid #31507a;
  padding: 0.5rem 0.8rem;
  border-radius: 999px;
  font-size: 0.85rem;
  white-space: nowrap;
}

.panel {
  display: none;
}

.panel.active {
  display: block;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 0.8rem;
  margin-bottom: 1rem;
}

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

.card {
  background: linear-gradient(170deg, var(--panel), var(--panel-2));
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1rem;
  box-shadow: var(--shadow);
}

.mini-stat {
  background: linear-gradient(170deg, var(--panel), #162235);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.8rem;
}

.mini-stat p {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.mini-stat strong {
  font-size: 1.3rem;
}

.list,
.list-grid {
  display: grid;
  gap: 0.7rem;
}

.paths-layout {
  align-items: start;
  grid-template-columns: 390px minmax(0, 1fr);
}

.paths-filters {
  display: grid;
  gap: 0.6rem;
  margin-bottom: 0.8rem;
}

.paths-filter-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.6rem;
}

.paths-filter-grid select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--panel-2);
  color: var(--text);
  padding: 0.55rem 0.7rem;
}

#paths-list {
  max-height: 70vh;
  overflow: auto;
  padding-right: 0.2rem;
}

.path-btn {
  text-align: left;
  transition: border-color .2s ease, transform .2s ease;
}

.path-btn:hover {
  border-color: #4b6f9e;
  transform: translateY(-1px);
}

.path-btn.active {
  border-color: #5ea8ff;
  box-shadow: 0 0 0 1px rgba(94, 168, 255, 0.3) inset;
}

#path-detail-description {
  line-height: 1.6;
  background: #101a2b;
  border: 1px solid #2a3d5f;
  border-radius: 10px;
  padding: 0.75rem 0.9rem;
}

#path-detail-outcome,
#path-detail-requirements,
#path-detail-milestones,
#path-detail-modules,
#path-detail-projects,
#path-detail-mistakes,
#path-detail-next {
  margin: 0.75rem 0;
  background: #101a2b;
  border: 1px solid #2a3d5f;
  border-radius: 10px;
  padding: 0.75rem 0.9rem;
}

#path-detail-outcome strong,
#path-detail-requirements strong,
#path-detail-milestones strong,
#path-detail-modules strong,
#path-detail-projects strong,
#path-detail-mistakes strong,
#path-detail-next strong {
  display: inline-block;
  margin-bottom: 0.45rem;
  color: #d2e4ff;
}

.item {
  background: linear-gradient(160deg, var(--panel-2), var(--panel-3));
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.8rem;
  color: var(--text);
}

.item h4 {
  margin: 0 0 0.35rem;
}

#code-input,
#playground {
  font-family: "Consolas", "Fira Code", monospace;
  min-height: 260px;
}

.code-editor-shell {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  background: #0b1322;
}

.code-editor-gutter {
  background: #0f1a2d;
  border-right: 1px solid #2f4466;
  overflow: hidden;
  user-select: none;
  padding-top: 0.55rem;
}

.code-editor-line-number {
  height: 1.55rem;
  line-height: 1.55rem;
  text-align: right;
  padding: 0 0.6rem;
  color: #7f93b7;
  font-family: "Consolas", "Fira Code", monospace;
  font-size: 0.82rem;
}

.code-editor-line-number.error {
  background: rgba(251, 113, 133, 0.2);
  color: #ffd5df;
  border-left: 2px solid rgba(251, 113, 133, 0.75);
}

.code-editor-input-wrap {
  background: #0b1322;
}

.code-editor-textarea {
  border: 0;
  border-radius: 0;
  margin: 0;
  min-height: 260px;
  line-height: 1.55rem;
  font-family: "Consolas", "Fira Code", monospace;
  background: #0b1322;
}

#admin-starter-code.code-editor-textarea {
  min-height: 180px;
}

.actions {
  display: flex;
  gap: 0.6rem;
  margin-top: 0.8rem;
  flex-wrap: wrap;
}

.feedback {
  margin-top: 0.8rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  min-height: 90px;
  padding: 0.8rem;
  background: #111a2a;
}

.feedback.ok {
  border-color: rgba(74, 222, 128, 0.45);
  background: rgba(74, 222, 128, 0.1);
}

.feedback.bad {
  border-color: rgba(251, 113, 133, 0.45);
  background: rgba(251, 113, 133, 0.1);
}

.hidden {
  display: none;
}

#exercise-meta {
  margin-bottom: 0.6rem;
}

.exercise-head p {
  margin-bottom: 0.75rem;
}

.exercise-filters {
  margin-bottom: 0.8rem;
  display: grid;
  gap: 0.6rem;
}

.exercise-filter-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.6rem;
}

.exercise-filter-grid label {
  font-size: 0.82rem;
}

.exercise-filter-grid select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--panel-2);
  color: var(--text);
  padding: 0.55rem 0.7rem;
}

.exercise-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.55rem;
  margin-bottom: 0.7rem;
}

.exercise-breakdown {
  grid-column: 1 / -1;
  font-size: 0.82rem;
  color: #b8caea;
  background: #132038;
  border: 1px solid #2f4568;
  border-radius: 10px;
  padding: 0.5rem 0.65rem;
}

.exercise-group {
  background: #122036;
  border-color: #35507a;
}

.exercise-group > h4 {
  margin-bottom: 0.55rem;
  color: #dce9ff;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
}

.exercise-btn {
  text-align: left;
  position: relative;
  transition: border-color .2s ease, transform .2s ease;
  border-radius: 12px;
  padding: 0.85rem;
}

.exercise-btn:hover {
  border-color: #4b6f9e;
  transform: translateY(-1px);
}

.exercise-btn.active {
  border-color: #5ea8ff;
  box-shadow: 0 0 0 1px rgba(94, 168, 255, 0.3) inset;
}

.exercise-btn.solved {
  border-color: rgba(74, 222, 128, 0.4);
}

.exercise-btn.locked {
  opacity: 0.72;
  border-style: dashed;
}

.exercise-btn:disabled {
  cursor: not-allowed;
}

.exercise-status {
  position: absolute;
  top: 0.55rem;
  right: 0.55rem;
  font-size: 0.72rem;
  background: #1d2e49;
  color: #d3e5ff;
  border: 1px solid #385b89;
  border-radius: 999px;
  padding: 0.2rem 0.45rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.exercise-btn.solved .exercise-status {
  background: rgba(74, 222, 128, 0.15);
  border-color: rgba(74, 222, 128, 0.4);
  color: #a8efc1;
}

#exercise-learning-hint {
  margin-bottom: 0.7rem;
  border-color: #4e411e;
  background: linear-gradient(155deg, #1a1610, #121212);
  color: #efdca0;
}

.exercise-open-toggle {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.84rem;
  color: #d9d9d9;
}

.exercise-open-toggle input[type='checkbox'] {
  width: auto;
}

.quiz-option {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
}

.quiz-option input {
  width: auto;
  margin-top: 0.2rem;
}

.code-block {
  margin: 0.6rem 0;
  background: #09111f;
  color: #d9e7ff;
  border-radius: 10px;
  border: 1px solid #273a59;
  padding: 0.8rem;
  overflow-x: auto;
}

.code-block code {
  font-family: "Consolas", "Fira Code", monospace;
  font-size: 0.9rem;
  line-height: 1.5;
  display: block;
}

.code-line {
  display: block;
  padding-left: 3.2rem;
  position: relative;
  min-height: 1.45rem;
  line-height: 1.45rem;
  white-space: pre-wrap;
  word-break: break-word;
}

.code-line::before {
  content: attr(data-ln);
  position: absolute;
  left: 0;
  top: 0;
  width: 2.4rem;
  text-align: right;
  color: #7c90b2;
  padding-right: 0.5rem;
  border-right: 1px solid #2a3d5a;
}

.docs-layout {
  align-items: start;
  grid-template-columns: 340px minmax(0, 1fr);
}

#docs-tree {
  max-height: 74vh;
  overflow: auto;
  padding-right: 0.3rem;
  scrollbar-width: thin;
  scrollbar-color: #4b6b97 #101a2a;
}

#docs-tree::-webkit-scrollbar {
  width: 10px;
}

#docs-tree::-webkit-scrollbar-track {
  background: #101a2a;
  border-radius: 10px;
}

#docs-tree::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #5a7faf, #3c597f);
  border-radius: 10px;
  border: 2px solid #101a2a;
}

#docs-tree::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, #6e95c9, #4c6f9d);
}

.docs-section h4 {
  margin: 0 0 0.5rem;
  font-size: 0.95rem;
  color: #c8dbff;
}

.docs-group summary {
  cursor: pointer;
  margin-bottom: 0.5rem;
  color: #dde9ff;
}

.docs-pages {
  margin-top: 0.6rem;
}

.doc-page-btn {
  text-align: left;
  transition: border-color .2s ease, transform .2s ease;
}

.doc-page-btn:hover {
  border-color: #466a98;
  transform: translateY(-1px);
}

.doc-page-btn.active {
  border-color: #5ea8ff;
  box-shadow: 0 0 0 1px rgba(94, 168, 255, 0.3) inset;
}

.doc-page-head {
  margin-bottom: 0.6rem;
}

#doc-breadcrumb {
  margin: 0.2rem 0 0;
  font-size: 0.85rem;
}

#doc-page-links a,
#academy-lesson-links a {
  text-decoration: none;
  color: #cce2ff;
}

#doc-page-links a:hover,
#academy-lesson-links a:hover {
  color: #ffffff;
}

#academy-lesson-videos {
  margin-top: 0.75rem;
}

#academy-lesson-videos strong {
  display: inline-block;
  margin-bottom: 0.45rem;
  color: #d7e7ff;
}

#academy-lesson-videos .item {
  border-color: #35537d;
}

.academy-layout {
  align-items: start;
  grid-template-columns: 360px minmax(0, 1fr);
}

#academy-stage-list {
  max-height: 72vh;
  overflow: auto;
  padding-right: 0.3rem;
  scrollbar-width: thin;
  scrollbar-color: #4b6b97 #101a2a;
}

#academy-stage-list::-webkit-scrollbar {
  width: 10px;
}

#academy-stage-list::-webkit-scrollbar-track {
  background: #101a2a;
  border-radius: 10px;
}

#academy-stage-list::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #5a7faf, #3c597f);
  border-radius: 10px;
  border: 2px solid #101a2a;
}

.academy-lesson-list {
  margin-top: 0.7rem;
}

.academy-lesson-btn {
  text-align: left;
  transition: border-color .2s ease, transform .2s ease;
  overflow-wrap: anywhere;
}

.academy-lesson-btn small {
  display: block;
  margin-top: 0.2rem;
  color: #a9bddf;
}

.academy-lesson-mark {
  display: inline-block;
  margin-right: 0.35rem;
  font-size: 0.72rem;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  border: 1px solid #3b5b86;
  background: #1a2f4c;
  color: #cfe2ff;
  text-transform: uppercase;
}

.academy-lesson-btn.done .academy-lesson-mark {
  border-color: rgba(74, 222, 128, 0.45);
  background: rgba(74, 222, 128, 0.15);
  color: #baf1ce;
}

.academy-lesson-btn:hover {
  border-color: #4f74a3;
  transform: translateY(-1px);
}

.academy-stage-card h4 {
  margin-bottom: 0.35rem;
  overflow-wrap: anywhere;
}

.academy-stage-card p,
.academy-stage-card small {
  overflow-wrap: anywhere;
  word-break: break-word;
  line-height: 1.45;
}

#academy-lesson-theory {
  line-height: 1.65;
  background: #101a2b;
  border: 1px solid #2a3d5f;
  border-radius: 10px;
  padding: 0.8rem;
}

.academy-read-aloud {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin: 0.4rem 0 0.7rem;
  flex-wrap: wrap;
}

#academy-read-status {
  font-size: 0.86rem;
}

#academy-lesson-goals,
#academy-lesson-concepts,
#academy-lesson-steps,
#academy-lesson-key-points,
#academy-lesson-deep-dive,
#academy-lesson-errors,
#academy-lesson-check-questions,
#academy-lesson-summary,
#academy-lesson-next-topics {
  margin: 0.75rem 0;
}

#academy-lesson-goals,
#academy-lesson-concepts,
#academy-lesson-steps,
#academy-lesson-key-points,
#academy-lesson-deep-dive,
#academy-lesson-errors,
#academy-lesson-check-questions,
#academy-lesson-summary,
#academy-lesson-next-topics {
  background: #101a2b;
  border: 1px solid #2a3d5f;
  border-radius: 10px;
  padding: 0.75rem 0.9rem;
}

#academy-lesson-goals strong,
#academy-lesson-concepts strong,
#academy-lesson-steps strong,
#academy-lesson-key-points strong,
#academy-lesson-deep-dive strong,
#academy-lesson-errors strong,
#academy-lesson-check-questions strong,
#academy-lesson-summary strong,
#academy-lesson-next-topics strong {
  display: inline-block;
  margin-bottom: 0.45rem;
  color: #cfe1ff;
}

#academy-lesson-summary p {
  margin: 0.15rem 0 0;
  color: #dce9ff;
  line-height: 1.55;
}

#academy-toggle-tips {
  margin-top: 0.5rem;
}

#academy-lesson-tips {
  margin-top: 0.6rem;
}

.academy-lesson-btn.active {
  border-color: #5ea8ff;
  box-shadow: 0 0 0 1px rgba(94, 168, 255, 0.28) inset;
}

#academy-lesson-steps ul {
  margin-top: 0.4rem;
}

.admin-form {
  display: grid;
  gap: 0.8rem;
}

@media (max-width: 1200px) {
  .docs-layout {
    grid-template-columns: 1fr;
  }

  .academy-layout {
    grid-template-columns: 1fr;
  }

  .paths-layout {
    grid-template-columns: 1fr;
  }

  .paths-filter-grid {
    grid-template-columns: 1fr;
  }

  .exercise-filter-grid {
    grid-template-columns: 1fr;
  }

  #docs-tree {
    max-height: 40vh;
  }
}

@media (max-width: 900px) {
  .split {
    grid-template-columns: 1fr;
  }

  .sidebar {
    flex-direction: column;
    align-items: stretch;
  }

  .sidebar nav {
    justify-content: flex-start;
  }

  .topbar {
    flex-direction: column;
  }
}

/* =========================
   VEXON MODERN DARK THEME
   Black/Grey + Gold accents
========================= */

:root {
  --bg: #060606;
  --bg-2: #0d0d0d;
  --panel: #131313;
  --panel-2: #1a1a1a;
  --panel-3: #222222;
  --text: #f5f5f5;
  --muted: #b8b8b8;
  --brand: #d4af37;
  --brand-2: #f0d27a;
  --ok: #46d28d;
  --warn: #e4b64a;
  --error: #f2787e;
  --border: #333333;
  --shadow: 0 20px 44px rgba(0, 0, 0, 0.55);
}

body {
  font-family: "Sora", "Poppins", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 12% 8%, rgba(212, 175, 55, 0.18), transparent 26%),
    radial-gradient(circle at 90% 5%, rgba(240, 210, 122, 0.1), transparent 28%),
    linear-gradient(160deg, #030303, #101010);
  color: var(--text);
}

.eyebrow {
  color: var(--brand);
}

.login-card,
.card,
.item,
.mini-stat {
  background: linear-gradient(165deg, rgba(20, 20, 20, 0.98), rgba(12, 12, 12, 0.98));
  border-color: #2f2f2f;
  box-shadow: var(--shadow);
}

.sidebar {
  background: rgba(9, 9, 9, 0.96);
  border-bottom-color: #2d2d2d;
}

.brand h2 {
  color: #f3f3f3;
}

.topbar h1 {
  color: #f8f8f8;
  letter-spacing: 0.01em;
}

input,
textarea,
.paths-filter-grid select,
.exercise-filter-grid select {
  background: #121212;
  border-color: #353535;
  color: #f2f2f2;
}

input:focus,
textarea:focus,
select:focus {
  outline: 2px solid rgba(212, 175, 55, 0.38);
  border-color: #8a7227;
  box-shadow: 0 0 0 4px rgba(212, 175, 55, 0.15);
}

button {
  background: linear-gradient(125deg, #c79f2d, #f0d27a);
  color: #151515;
  box-shadow: 0 10px 24px rgba(212, 175, 55, 0.28);
  transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
}

button:hover {
  transform: translateY(-1px);
  filter: brightness(1.03);
  box-shadow: 0 12px 26px rgba(212, 175, 55, 0.36);
}

button.secondary,
.nav-btn,
.logout,
.badge {
  background: linear-gradient(155deg, #1c1c1c, #131313);
  color: #ececec;
  border-color: #3a3a3a;
}

.nav-btn.active {
  background: linear-gradient(120deg, #70591b, #d4af37);
  border-color: #f0d27a;
  color: #131313;
  box-shadow: 0 0 0 1px rgba(240, 210, 122, 0.35) inset;
}

.logout:hover,
.nav-btn:hover,
.doc-page-btn:hover,
.exercise-btn:hover,
.path-btn:hover {
  border-color: #8a7227;
}

.doc-page-btn.active,
.exercise-btn.active,
.path-btn.active,
.academy-lesson-btn.active {
  border-color: #d4af37;
  box-shadow: 0 0 0 1px rgba(212, 175, 55, 0.32) inset;
}

#doc-path-progress {
  border-color: #4e411e;
  background: linear-gradient(155deg, #1a1610, #121212);
  color: #efdca0;
}

.doc-step-btn {
  text-align: left;
  transition: border-color .2s ease, transform .2s ease, opacity .2s ease;
}

.doc-step-btn:hover:not(:disabled) {
  transform: translateY(-1px);
  border-color: #8a7227;
}

.doc-step-btn.solved {
  border-color: rgba(70, 210, 141, 0.5);
}

.doc-step-btn:disabled {
  opacity: 0.58;
  border-style: dashed;
  cursor: not-allowed;
}

.exercise-status {
  background: #181818;
  border-color: #3d3d3d;
  color: #e8e8e8;
}

.exercise-btn.solved {
  border-color: rgba(70, 210, 141, 0.45);
}

.exercise-btn.locked {
  background: linear-gradient(165deg, rgba(16, 16, 16, 0.98), rgba(10, 10, 10, 0.98));
  border-color: #424242;
}

.feedback {
  background: #101010;
  border-color: #333333;
}

.feedback.ok {
  border-color: rgba(70, 210, 141, 0.45);
  background: rgba(70, 210, 141, 0.12);
}

.feedback.bad {
  border-color: rgba(242, 120, 126, 0.48);
  background: rgba(242, 120, 126, 0.12);
}

.code-editor-shell,
.code-editor-input-wrap,
.code-editor-textarea,
.code-block {
  background: #0b0b0b;
  border-color: #2e2e2e;
}

.code-editor-gutter {
  background: #141414;
  border-right-color: #333333;
}

.code-editor-line-number {
  color: #9a9a9a;
}

.code-line::before {
  color: #8f8f8f;
  border-right-color: #2f2f2f;
}

#docs-tree::-webkit-scrollbar-track,
#academy-stage-list::-webkit-scrollbar-track {
  background: #0f0f0f;
}

#docs-tree::-webkit-scrollbar-thumb,
#academy-stage-list::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #8a7227, #d4af37);
  border-color: #0f0f0f;
}

#docs-tree::-webkit-scrollbar-thumb:hover,
#academy-stage-list::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, #a88a33, #f0d27a);
}

.panel.active {
  animation: vexonFadeIn 0.35s ease;
}

.card {
  animation: vexonLift 0.35s ease;
}

@keyframes vexonFadeIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes vexonLift {
  from {
    opacity: 0.85;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* =========================
   LEARNING AREA REDESIGN
========================= */

#panel-docs .docs-layout {
  grid-template-columns: 380px minmax(0, 1fr);
  gap: 1.2rem;
}

#panel-docs .card:first-child {
  position: sticky;
  top: 88px;
  align-self: start;
  max-height: calc(100vh - 108px);
  overflow: auto;
}

#panel-docs .card:first-child h3 {
  font-size: 1.02rem;
  margin-bottom: 0.35rem;
}

#panel-docs .card:nth-child(2) {
  min-height: 72vh;
  max-height: calc(100vh - 108px);
  overflow: auto;
  border-color: #4d3f1d;
  background:
    linear-gradient(170deg, rgba(19, 19, 19, 0.98), rgba(12, 12, 12, 0.98)),
    radial-gradient(circle at 92% 5%, rgba(212, 175, 55, 0.12), transparent 32%);
}

#doc-path-progress {
  position: sticky;
  top: 0;
  z-index: 2;
  margin-bottom: 0.75rem;
  border-width: 1px;
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.35);
}

#docs-tree {
  display: grid;
  gap: 0.55rem;
  scroll-behavior: smooth;
}

.doc-step-btn {
  border-radius: 12px;
  padding: 0.75rem 0.85rem;
  background: linear-gradient(160deg, #1a1a1a, #111111);
  border: 1px solid #353535;
}

.doc-step-btn strong {
  font-size: 0.92rem;
  line-height: 1.35;
  color: #f2f2f2;
}

.doc-step-btn small {
  display: inline-block;
  margin-top: 0.3rem;
  color: #bfa86a;
}

.doc-step-btn.active {
  border-color: #e5c56a;
  box-shadow:
    0 0 0 1px rgba(212, 175, 55, 0.38) inset,
    0 8px 18px rgba(212, 175, 55, 0.16);
}

.doc-step-btn.solved {
  background: linear-gradient(160deg, #132018, #101710);
}

#doc-page-title {
  font-size: 1.35rem;
  line-height: 1.25;
  margin-bottom: 0.35rem;
  color: #f5e3af;
}

#doc-page-summary {
  font-size: 1rem;
  line-height: 1.6;
  color: #d9d9d9;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid #2d2a23;
}

#doc-page-level {
  margin: 0.5rem 0 0.95rem;
  padding: 0.55rem 0.7rem;
  border-radius: 10px;
  border: 1px solid #3d3320;
  background: linear-gradient(165deg, #16130f, #121212);
  color: #e6d39a;
}

#doc-page-bullets {
  display: grid;
  gap: 0.7rem;
  margin-top: 0.55rem;
}

#doc-page-bullets strong {
  color: #f0d27a;
}

#doc-page-bullets ul {
  margin: 0.35rem 0 0.2rem;
  padding-left: 1.2rem;
}

#doc-page-bullets li {
  line-height: 1.6;
  color: #e5e5e5;
  margin-bottom: 0.35rem;
}

#doc-page-links {
  margin-top: 0.8rem;
}

#doc-page-links .item {
  border-color: #4a3c1b;
  background: linear-gradient(160deg, #1a1610, #121212);
}

#panel-docs .actions {
  margin-top: 1rem;
  padding-top: 0.8rem;
  border-top: 1px solid #332c1a;
  position: sticky;
  bottom: 0;
  background: linear-gradient(180deg, rgba(12, 12, 12, 0), rgba(12, 12, 12, 0.95) 30%);
  backdrop-filter: blur(3px);
}

#doc-prev-step,
#doc-next-step {
  min-width: 150px;
}

#doc-mark-complete {
  min-width: 220px;
}

/* Premium scrollbars for learning area */
#panel-docs .card:first-child::-webkit-scrollbar,
#panel-docs .card:nth-child(2)::-webkit-scrollbar {
  width: 11px;
}

#panel-docs .card:first-child::-webkit-scrollbar-track,
#panel-docs .card:nth-child(2)::-webkit-scrollbar-track {
  background: #0f0f0f;
  border-radius: 10px;
}

#panel-docs .card:first-child::-webkit-scrollbar-thumb,
#panel-docs .card:nth-child(2)::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #7f6928, #d4af37);
  border-radius: 999px;
  border: 2px solid #0f0f0f;
}

#panel-docs .card:first-child::-webkit-scrollbar-thumb:hover,
#panel-docs .card:nth-child(2)::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, #9b7f31, #f0d27a);
}

#panel-docs .card:first-child,
#panel-docs .card:nth-child(2) {
  scrollbar-width: thin;
  scrollbar-color: #c9a843 #0f0f0f;
}

@media (max-width: 1200px) {
  #panel-docs .docs-layout {
    grid-template-columns: 1fr;
  }

  #panel-docs .card:first-child {
    position: static;
    max-height: none;
  }

  #panel-docs .card:nth-child(2) {
    min-height: auto;
  }
}

/* =========================
   PLAYGROUND IDE LOOK
========================= */

.playground-ide {
  border: 1px solid #3a3a3a;
  border-radius: 12px;
  overflow: hidden;
  background: #0e0e0e;
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.42);
}

.ide-titlebar {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.45rem 0.7rem;
  border-bottom: 1px solid #2f2f2f;
  background: linear-gradient(180deg, #1b1b1b, #141414);
}

.ide-dots {
  display: flex;
  gap: 0.35rem;
}

.ide-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.ide-dot-close { background: #f87171; }
.ide-dot-min { background: #fbbf24; }
.ide-dot-max { background: #4ade80; }

.ide-tab {
  font-size: 0.84rem;
  padding: 0.35rem 0.6rem;
  border: 1px solid #3a3a3a;
  border-radius: 8px;
  background: #1a1a1a;
  color: #d8d8d8;
}

.ide-tab.active {
  border-color: #7b6524;
  color: #f1d989;
  background: linear-gradient(160deg, #2a2313, #1a1a1a);
}

.ide-toolbar {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  flex-wrap: wrap;
  padding: 0.55rem 0.7rem;
  border-bottom: 1px solid #2f2f2f;
  background: #111111;
}

.ide-toolbar label {
  font-size: 0.78rem;
  color: #c4c4c4;
  margin: 0;
}

.ide-toolbar select {
  width: auto;
  min-width: 170px;
  background: #1a1a1a;
  border-color: #3b3b3b;
  padding: 0.45rem 0.55rem;
  border-radius: 8px;
}

#panel-playground .playground-ide .code-editor-shell {
  border: 0;
  border-radius: 0;
  background: #0b0b0b;
}

#panel-playground .playground-ide .code-editor-gutter {
  background: #111111;
  border-right-color: #2f2f2f;
}

#panel-playground .playground-ide .code-editor-line-number {
  color: #949494;
}

#panel-playground .playground-ide .code-editor-textarea {
  min-height: 360px;
  font-size: 0.95rem;
  line-height: 1.6rem;
}

.ide-statusbar {
  display: flex;
  justify-content: flex-end;
  gap: 1rem;
  padding: 0.35rem 0.7rem;
  border-top: 1px solid #2f2f2f;
  background: linear-gradient(180deg, #121212, #0d0d0d);
  color: #d6d6d6;
  font-size: 0.78rem;
}

.ide-statusbar span:first-child {
  margin-right: auto;
  color: #efd28b;
}