:root {
  --bg: #141414;
  --bg-elevated: #1d1d1d;
  --bg-soft: #232323;
  --text: #f7f7f7;
  --muted: #b5b5b5;
  --accent: #e50914;
  --accent-soft: rgba(229, 9, 20, 0.18);
  --line: rgba(255, 255, 255, 0.08);
  --shadow: 0 20px 40px rgba(0, 0, 0, 0.45);
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top right, rgba(229, 9, 20, 0.18), transparent 24%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.02), transparent 30%),
    var(--bg);
  color: var(--text);
  font-family: "Manrope", sans-serif;
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
  border: 0;
}

.app-shell {
  min-height: 100vh;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 32px;
  background: linear-gradient(180deg, rgba(20, 20, 20, 0.96), rgba(20, 20, 20, 0.7));
  backdrop-filter: blur(14px);
  transition: padding 220ms ease, gap 220ms ease, background-color 220ms ease, border-color 220ms ease;
}

.brand {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: 0.04em;
  transition: font-size 220ms ease, transform 220ms ease;
}

.topnav {
  display: flex;
  gap: 8px;
  flex: 1;
  overflow-x: auto;
  scrollbar-width: none;
}

.topnav::-webkit-scrollbar,
.row-track::-webkit-scrollbar {
  display: none;
}

.nav-link,
.ghost-button,
.profile-pill,
.text-button,
.primary-button,
.secondary-button,
.auth-tab,
.close-button {
  transition: transform 180ms ease, background-color 180ms ease, color 180ms ease, opacity 180ms ease;
}

.nav-link,
.ghost-button,
.text-button {
  background: transparent;
  color: var(--muted);
  text-decoration: none;
}

.nav-link {
  border-radius: 999px;
  padding: 9px 14px;
}

.nav-link:hover,
.nav-link.is-active {
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  transition: gap 220ms ease;
}

.ghost-button,
.profile-pill,
.primary-button,
.secondary-button {
  border-radius: 999px;
  padding: 11px 18px;
}

.ghost-button {
  border: 1px solid var(--line);
}

.ghost-button:hover,
.text-button:hover {
  color: var(--text);
}

.profile-pill {
  background: var(--accent);
  color: var(--text);
  font-weight: 700;
}

.topbar.is-collapsed {
  gap: 14px;
  padding-top: 10px;
  padding-bottom: 10px;
  background: rgba(20, 20, 20, 0.94);
  border-bottom: 1px solid var(--line);
}

.topbar.is-collapsed .brand {
  font-size: 1.18rem;
  transform: translateY(-1px);
}

.topbar.is-collapsed .topbar-actions {
  gap: 8px;
}

.topbar.is-collapsed .nav-link,
.topbar.is-collapsed .ghost-button,
.topbar.is-collapsed .profile-pill {
  padding-top: 8px;
  padding-bottom: 8px;
}

.hero {
  position: relative;
  min-height: 220px;
  padding: 28px 32px 24px;
  display: flex;
  align-items: end;
  overflow: hidden;
  transition: min-height 260ms ease, padding 260ms ease, background-color 260ms ease, border-color 260ms ease;
}

.hero-backdrop {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(20, 20, 20, 0.86), rgba(20, 20, 20, 0.28)),
    radial-gradient(circle at top center, rgba(229, 9, 20, 0.32), transparent 38%),
    url("https://images.unsplash.com/photo-1509062522246-3755977927d7?auto=format&fit=crop&w=1600&q=80") center/cover;
  filter: saturate(0.85);
  transition: opacity 220ms ease, transform 260ms ease, filter 260ms ease;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 980px;
  transition: transform 260ms ease, opacity 220ms ease;
}

.hero-kicker {
  margin: 0 0 8px;
  color: #ffffff;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  font-size: 0.72rem;
}

.hero h1 {
  margin: 0;
  font-size: clamp(1.55rem, 2.4vw, 2.35rem);
  line-height: 1.06;
  max-width: 22ch;
}

.hero-copy {
  max-width: 72ch;
  color: #d7d7d7;
  font-size: 0.92rem;
  line-height: 1.45;
  margin: 10px 0 14px;
  transition: opacity 180ms ease, max-height 220ms ease, margin 220ms ease;
}

.hero-actions,
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  transition: opacity 180ms ease, max-height 220ms ease, margin 220ms ease;
}

.primary-button {
  background: var(--accent);
  color: var(--text);
  font-weight: 700;
  box-shadow: 0 12px 24px rgba(229, 9, 20, 0.25);
}

.primary-button:hover,
.secondary-button:hover,
.profile-pill:hover {
  transform: translateY(-1px);
}

.secondary-button {
  background: rgba(255, 255, 255, 0.12);
  color: var(--text);
}

.hero-meta {
  margin-top: 12px;
  color: var(--muted);
  font-size: 0.82rem;
  transition: opacity 180ms ease, max-height 220ms ease, margin 220ms ease;
}

.hero-meta span {
  padding: 6px 10px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 999px;
}

.hero.is-collapsed {
  min-height: 86px;
  padding-top: 14px;
  padding-bottom: 12px;
  background: rgba(20, 20, 20, 0.92);
  border-bottom: 1px solid var(--line);
}

.hero.is-collapsed .hero-content {
  transform: translateY(-4px);
}

.hero.is-collapsed .hero-backdrop {
  opacity: 0.42;
  transform: scale(1.03);
  filter: saturate(0.7);
}

.hero.is-collapsed .hero-copy,
.hero.is-collapsed .hero-actions,
.hero.is-collapsed .hero-meta {
  opacity: 0;
  max-height: 0;
  margin-top: 0;
  margin-bottom: 0;
  overflow: hidden;
  pointer-events: none;
}

.hero.is-collapsed h1 {
  font-size: clamp(1.2rem, 2vw, 1.6rem);
  max-width: 28ch;
}

.dashboard-strip,
.content-section {
  padding: 0 32px 36px;
}

.admin-page-shell {
  padding-top: 20px;
}

.admin-guard .pricing-card {
  max-width: 760px;
}

.admin-overview-grid,
.admin-user-grid {
  display: grid;
  gap: 16px;
}

.admin-overview-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

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

.admin-user-card {
  padding: 18px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--line);
  display: grid;
  gap: 14px;
}

.admin-user-head h3 {
  margin: 10px 0 6px;
}

.admin-user-stats {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 0.94rem;
}

.dashboard-strip {
  margin-top: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.stat-card {
  padding: 18px 20px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.03));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.stat-card.accent {
  background: linear-gradient(180deg, rgba(229, 9, 20, 0.22), rgba(255, 255, 255, 0.04));
}

.stat-label {
  display: block;
  color: var(--muted);
  margin-bottom: 8px;
}

.stat-card strong {
  font-size: 1.2rem;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 16px;
  margin-bottom: 18px;
}

.section-head h2 {
  margin: 0;
  font-size: 1.45rem;
}

.section-head p,
.text-button,
.small-copy,
.subject-meta,
.card-meta {
  color: var(--muted);
}

.daily-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.daily-card,
.topic-card,
.pricing-card,
.auth-card,
.details-panel {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.03));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.daily-card {
  padding: 18px;
}

.daily-card p {
  color: #dddddd;
  line-height: 1.5;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 7px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: #ececec;
  font-size: 0.84rem;
}

.subject-row {
  margin-bottom: 30px;
}

.subject-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  margin-bottom: 14px;
}

.subject-head h3 {
  margin: 0;
  font-size: 1.25rem;
}

.row-track {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(250px, 320px);
  gap: 16px;
  overflow-x: auto;
  padding-bottom: 10px;
}

.topic-card {
  position: relative;
  min-height: 350px;
  overflow: hidden;
  transform-origin: center;
}

.topic-card:hover {
  transform: scale(1.04);
  z-index: 2;
}

.topic-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, transparent 22%, rgba(20, 20, 20, 0.92) 100%),
    var(--card-image, linear-gradient(120deg, rgba(229, 9, 20, 0.22), rgba(255, 255, 255, 0.02)));
}

.card-body {
  position: absolute;
  inset: auto 0 0;
  padding: 20px;
}

.card-badge {
  display: inline-block;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: #fff2f3;
  font-size: 0.8rem;
  margin-bottom: 10px;
}

.card-body h4 {
  margin: 0 0 10px;
  font-size: 1.3rem;
}

.card-meta {
  display: flex;
  gap: 12px;
  font-size: 0.88rem;
}

.card-hover {
  margin-top: 12px;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 220ms ease, opacity 180ms ease;
}

.topic-card:hover .card-hover,
.topic-card:focus-within .card-hover {
  max-height: 180px;
  opacity: 1;
}

.card-hover p {
  color: #e3e3e3;
  line-height: 1.45;
  margin: 0 0 14px;
}

.inline-actions {
  display: flex;
  gap: 10px;
}

.inline-actions button {
  padding: 9px 12px;
  border-radius: 10px;
}

.payment-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 16px;
}

.pricing-card {
  padding: 24px;
}

.pricing-card h3 {
  margin-top: 0;
}

.pricing-card.muted {
  opacity: 0.92;
}

.pricing-badge {
  display: inline-block;
  margin-bottom: 12px;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
}

.pricing-price {
  font-size: 2rem;
  font-weight: 800;
  margin: 10px 0 18px;
}

.pricing-list {
  list-style: none;
  padding: 0;
  margin: 0 0 22px;
  display: grid;
  gap: 10px;
  color: #e6e6e6;
}

.paypal-box {
  min-height: 46px;
  margin-bottom: 12px;
}

.details-panel {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  max-height: 100vh;
  padding: 96px 32px 32px;
  overflow-y: auto;
  background:
    linear-gradient(180deg, rgba(20, 20, 20, 0.98), rgba(20, 20, 20, 0.96)),
    radial-gradient(circle at top right, rgba(229, 9, 20, 0.14), transparent 22%);
  backdrop-filter: blur(14px);
  transform: translateX(100%);
  transition: transform 260ms ease;
  z-index: 60;
}

.details-panel.is-open {
  transform: translateX(0);
}

.close-button {
  position: absolute;
  top: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
  font-size: 1.3rem;
}

.detail-stack {
  display: grid;
  gap: 24px;
  max-width: 1240px;
  margin: 0 auto;
}

.detail-stack h3,
.detail-stack h4 {
  margin: 0;
}

.lesson-list,
.task-list {
  display: grid;
  gap: 16px;
}

.lesson-item,
.task-item {
  padding: 18px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--line);
}

.task-item button {
  margin-top: 12px;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
  transform: none !important;
  box-shadow: none;
}

.player-hero {
  display: grid;
  gap: 16px;
  padding: 24px;
  border-radius: 24px;
  background: linear-gradient(135deg, rgba(229, 9, 20, 0.14), rgba(255, 255, 255, 0.03));
  border: 1px solid var(--line);
}

.player-hero h3 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.3rem);
}

.player-level-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
}

.player-level-head h4 {
  margin: 10px 0 8px;
  font-size: 1.45rem;
}

.level-status-copy {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.5;
}

.question-card {
  display: grid;
  gap: 14px;
}

.question-card p {
  margin: 0;
  color: #e8e8e8;
  line-height: 1.55;
}

.answer-form {
  display: grid;
  gap: 12px;
}

.answer-input,
.answer-choice {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
}

.choice-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.answer-choice {
  text-align: left;
}

.answer-choice.is-selected {
  border-color: rgba(229, 9, 20, 0.7);
  background: rgba(229, 9, 20, 0.14);
}

.feedback-box {
  min-height: 24px;
  font-size: 0.95rem;
}

.feedback-box.is-correct {
  color: #7ee0a0;
}

.feedback-box.is-wrong {
  color: #ffb3b7;
}

.solution-box {
  padding: 12px 14px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.05);
  color: #d7d7d7;
  line-height: 1.5;
}

.auth-overlay {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(5, 5, 5, 0.82);
  backdrop-filter: blur(10px);
  z-index: 50;
}

.auth-overlay.is-hidden {
  display: none;
}

.auth-card {
  width: min(920px, 100%);
  padding: 28px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.auth-copy h2 {
  margin: 0 0 16px;
  font-size: 2rem;
}

.auth-copy p {
  color: #d8d8d8;
  line-height: 1.6;
}

.auth-tabs {
  grid-column: 2;
  display: flex;
  gap: 10px;
  align-self: end;
}

.auth-tab {
  background: rgba(255, 255, 255, 0.08);
  color: var(--muted);
  padding: 10px 14px;
  border-radius: 999px;
}

.auth-tab.is-active {
  background: var(--accent);
  color: var(--text);
}

.auth-form {
  grid-column: 2;
  display: grid;
  gap: 14px;
}

.auth-form label {
  display: grid;
  gap: 8px;
}

.auth-form input,
.auth-form select,
.admin-form input,
.admin-form select,
.admin-form textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
}

.admin-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 16px;
}

.admin-grid.admin-grid-wide {
  grid-template-columns: 1.2fr 0.8fr;
}

.admin-form {
  display: grid;
  gap: 14px;
}

.admin-form label {
  display: grid;
  gap: 8px;
}

.admin-form textarea {
  resize: vertical;
  min-height: 240px;
}

.admin-editor-toolbar {
  display: flex;
  justify-content: flex-start;
}

.grade-editor-list,
.level-editor-list,
.task-editor-list {
  display: grid;
  gap: 14px;
}

.grade-editor-card,
.level-editor-card {
  padding: 16px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
}

.grade-editor-head,
.level-editor-head,
.task-editor-row,
.task-editor-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.grade-editor-head h4,
.level-editor-head h5,
.task-editor-head h6 {
  margin: 0;
}

.grade-editor-grid,
.level-editor-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 14px;
}

.grade-editor-grid .full-span,
.level-editor-grid .full-span {
  grid-column: 1 / -1;
}

.task-editor-card {
  padding: 14px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.task-editor-grid,
.task-option-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.task-editor-grid {
  margin-top: 14px;
}

.task-editor-grid .full-span {
  grid-column: 1 / -1;
}

.task-option-list {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.task-option-row {
  align-items: center;
}

.task-option-row .admin-icon-button {
  justify-self: end;
}

.admin-preview-card {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.admin-preview-task {
  margin-top: 12px;
  background: linear-gradient(180deg, rgba(229, 9, 20, 0.1), rgba(255, 255, 255, 0.03));
}

.admin-icon-button {
  min-width: 42px;
  height: 42px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
}

.admin-muted-box {
  padding: 14px;
  border-radius: 14px;
  border: 1px dashed var(--line);
  color: var(--muted);
  text-align: center;
}

.admin-list {
  display: grid;
  gap: 12px;
}

.admin-item {
  padding: 14px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.05);
}

.admin-item h4 {
  margin: 0 0 8px;
}

.full-width {
  width: 100%;
}

.auth-message {
  grid-column: 2;
  min-height: 24px;
  color: #ffb3b7;
}

.auth-utility {
  grid-column: 2;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-self: start;
}

.hidden {
  display: none !important;
}

@media (max-width: 1040px) {
  .admin-overview-grid,
  .dashboard-strip,
  .daily-grid,
  .payment-grid,
  .admin-grid,
  .auth-card {
    grid-template-columns: 1fr 1fr;
  }

  .auth-copy,
  .auth-tabs,
  .auth-form,
  .auth-message,
  .auth-utility {
    grid-column: auto;
  }
}

@media (max-width: 760px) {
  .topbar,
  .hero,
  .dashboard-strip,
  .content-section {
    padding-left: 18px;
    padding-right: 18px;
  }

  .topbar {
    flex-wrap: wrap;
  }

  .hero {
    min-height: 190px;
    padding-top: 22px;
    padding-bottom: 18px;
  }

  .hero h1 {
    font-size: 1.45rem;
    max-width: 100%;
  }

  .hero-copy {
    font-size: 0.88rem;
    margin: 8px 0 12px;
  }

  .dashboard-strip,
  .admin-user-grid,
  .daily-grid,
  .payment-grid,
  .admin-grid,
  .auth-card {
    grid-template-columns: 1fr;
  }

  .grade-editor-grid,
  .level-editor-grid {
    grid-template-columns: 1fr;
  }

  .section-head,
  .subject-head,
  .grade-editor-head,
  .level-editor-head,
  .task-editor-row {
    flex-direction: column;
    align-items: start;
  }

  .row-track {
    grid-auto-columns: minmax(220px, 76vw);
  }

  .details-panel {
    inset: 0;
    width: 100%;
    max-height: 100vh;
    padding: 88px 18px 18px;
    transform: translateY(100%);
  }

  .details-panel.is-open {
    transform: translateY(0);
  }

  .choice-grid {
    grid-template-columns: 1fr;
  }
}