:root {
  --pink: #ff2d8a;
  --purple: #9b5cff;
  --coral: #ff6b4a;
  --green: #39ff14;
  --black: #0a0a0f;
  --black-soft: #12121a;
  --white: #ffffff;
  --muted: #b8b8c8;
  --gradient-cta: linear-gradient(90deg, var(--pink), var(--purple));
  --font-display: "Bebas Neue", sans-serif;
  --font-body: "League Spartan", system-ui, sans-serif;
  --radius: 12px;
  --radius-lg: 20px;
  --app-max: 480px;
  --nav-h: 64px;
  --top-h: 56px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html,
body {
  height: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--white);
  background: var(--black);
  overflow-x: hidden;
}

a {
  color: var(--pink);
  text-decoration: none;
}

button,
input,
select {
  font: inherit;
}

.app-root {
  max-width: var(--app-max);
  margin: 0 auto;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  position: relative;
}

.top-bar {
  position: sticky;
  top: 0;
  z-index: 10;
  height: calc(var(--top-h) + env(safe-area-inset-top));
  padding: env(safe-area-inset-top) 16px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(10, 10, 15, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.top-bar h1 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.streak-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255, 45, 138, 0.5);
  background: rgba(255, 45, 138, 0.12);
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: 0.04em;
}

.app-content {
  flex: 1;
  padding: 16px;
  padding-bottom: calc(var(--nav-h) + env(safe-area-inset-bottom) + 16px);
}

.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: var(--app-max);
  height: calc(var(--nav-h) + env(safe-area-inset-bottom));
  padding-bottom: env(safe-area-inset-bottom);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: var(--black-soft);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  z-index: 20;
}

.bottom-nav a,
.bottom-nav button {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  color: var(--muted);
  background: none;
  border: none;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  min-height: 44px;
  cursor: pointer;
}

.bottom-nav a.active,
.bottom-nav button.active {
  color: var(--pink);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  border: none;
  border-radius: var(--radius);
  background: var(--gradient-cta);
  color: var(--white);
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  width: 100%;
}

.btn-ghost {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--white);
  min-height: 44px;
  padding: 0 16px;
  border-radius: var(--radius);
  cursor: pointer;
}

.status-banner {
  background: rgba(255, 107, 74, 0.15);
  border: 1px solid var(--coral);
  border-radius: var(--radius);
  padding: 12px 16px;
  margin-bottom: 16px;
  font-size: 0.9rem;
}

.class-card {
  display: flex;
  gap: 12px;
  background: var(--black-soft);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 12px;
  cursor: pointer;
}

.class-card img {
  width: 120px;
  min-height: 80px;
  object-fit: cover;
  flex-shrink: 0;
}

.class-card-body {
  padding: 12px 12px 12px 0;
  flex: 1;
  min-width: 0;
}

.class-card h3 {
  font-size: 1rem;
  margin-bottom: 4px;
}

.class-card .meta {
  color: var(--muted);
  font-size: 0.85rem;
}

.badge-new {
  display: inline-block;
  background: var(--purple);
  color: var(--white);
  font-size: 0.65rem;
  padding: 2px 6px;
  border-radius: 4px;
  margin-left: 6px;
  text-transform: uppercase;
}

.check-done {
  color: var(--green);
  font-weight: 700;
}

.filter-chips,
.keyword-chips {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  overflow-y: hidden;
  align-items: center;
  scrollbar-width: none;
  -ms-overflow-style: none;
  -webkit-overflow-scrolling: touch;
}

.filter-chips::-webkit-scrollbar,
.keyword-chips::-webkit-scrollbar {
  display: none;
}

.filter-chips {
  margin-bottom: 16px;
}

.keyword-chips {
  margin-bottom: 12px;
}

.class-search-bar {
  position: sticky;
  top: 0;
  z-index: 5;
  margin: 0 0 12px;
  padding: 4px 0 8px;
  background: linear-gradient(var(--black) 70%, transparent);
}

.class-search-wrap {
  position: relative;
}

.class-search-input {
  width: 100%;
  min-height: 44px;
  padding: 10px 14px;
  padding-right: 44px;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: var(--black-soft);
  color: var(--white);
  font: inherit;
}

.class-search-wrap:not(:has(.class-search-clear)) .class-search-input {
  padding-right: 14px;
}

.class-search-clear {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  border: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--muted);
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
}

.class-search-clear:hover {
  color: var(--white);
  background: rgba(255, 255, 255, 0.14);
}

.active-selections {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}

.selection-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 8px 6px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255, 45, 138, 0.45);
  background: rgba(255, 45, 138, 0.12);
  color: var(--white);
  font-size: 0.85rem;
}

.selection-clear {
  width: 22px;
  height: 22px;
  border: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  color: var(--white);
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  flex-shrink: 0;
}

.selection-clear:hover {
  background: rgba(255, 255, 255, 0.22);
}

.selection-clear-all {
  border: 0;
  background: transparent;
  color: var(--pink);
  font-size: 0.85rem;
  cursor: pointer;
  padding: 6px 4px;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.class-search-input:focus {
  outline: none;
  border-color: rgba(255, 45, 138, 0.55);
  box-shadow: 0 0 0 2px rgba(255, 45, 138, 0.15);
}

.class-search-input::-webkit-search-cancel-button {
  cursor: pointer;
}

.keyword-label {
  flex-shrink: 0;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.chip-count {
  margin-left: 6px;
  opacity: 0.65;
  font-size: 0.75rem;
}

.class-empty {
  margin: 8px 0 0;
  color: var(--muted);
}

.search-results-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.search-result-card {
  display: flex;
  gap: 14px;
  padding: 12px;
  background: var(--black-soft);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-lg);
  cursor: pointer;
}

.search-result-thumb {
  width: 112px;
  min-height: 84px;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius);
  flex-shrink: 0;
  background: rgba(255, 255, 255, 0.04);
}

.search-result-body {
  flex: 1;
  min-width: 0;
}

.search-result-body h3 {
  font-size: 1rem;
  margin: 0 0 6px;
  line-height: 1.3;
}

.search-result-desc {
  margin: 0 0 8px;
  font-size: 0.85rem;
  line-height: 1.45;
  color: var(--muted);
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.search-result-desc--empty {
  font-style: italic;
  opacity: 0.7;
}

.search-result-meta {
  margin: 0;
}

.search-hit {
  background: rgba(255, 45, 138, 0.25);
  color: var(--white);
  border-radius: 2px;
  padding: 0 1px;
}

.chip {
  flex-shrink: 0;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.85rem;
}

.chip.active {
  border-color: var(--pink);
  color: var(--pink);
  background: rgba(255, 45, 138, 0.1);
}

.classes-loading,
.class-load-sentinel {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 32px 16px;
}

.class-count {
  margin: 0 0 12px;
}

.loading-spinner {
  width: 28px;
  height: 28px;
  border: 2px solid rgba(255, 255, 255, 0.15);
  border-top-color: var(--pink);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.landing-hero {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 24px;
  max-width: var(--app-max);
  margin: 0 auto;
  text-align: center;
}

.landing-hero h1 {
  font-family: var(--font-display);
  font-size: 2.5rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.landing-hero p {
  color: var(--muted);
  margin-bottom: 24px;
}

.login-form {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.login-form input {
  padding: 12px 16px;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: var(--black-soft);
  color: var(--white);
}

.legal-ack {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.4;
  text-align: left;
}

.legal-ack input {
  margin-top: 3px;
  width: auto;
  min-height: auto;
  flex-shrink: 0;
}

.legal-ack a {
  color: var(--pink);
  text-decoration: underline;
}

.player-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: var(--black);
  display: none;
  flex-direction: column;
  overflow: hidden;
}

.player-overlay.open {
  display: flex;
}

.player-header {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  padding-top: calc(12px + env(safe-area-inset-top));
}

.player-body {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.player-frame {
  flex: 0 0 auto;
  width: 100%;
  max-height: min(42vh, calc(100vw * 9 / 16));
  aspect-ratio: 16 / 9;
  background: #000;
}

.player-frame iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

.player-meta {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 16px;
  padding-bottom: calc(16px + env(safe-area-inset-bottom));
}

.player-author {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.player-author img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--black-soft);
}

.player-author span {
  font-weight: 600;
}

.player-description {
  margin: 0 0 12px;
  line-height: 1.5;
  white-space: pre-wrap;
}

.player-duration {
  margin: 0;
}

.progress-ring-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  padding: 12px;
  background: var(--black-soft);
  border-radius: var(--radius-lg);
}

.stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 16px;
}

.stat-tile {
  background: var(--black-soft);
  border-radius: var(--radius-lg);
  padding: 16px;
  text-align: center;
}

.stat-tile strong {
  display: block;
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--pink);
}

.membership-card {
  background: var(--black-soft);
  border-radius: var(--radius-lg);
  padding: 16px;
  margin-bottom: 12px;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.membership-card--primary {
  border-color: rgba(255, 45, 138, 0.2);
}

.membership-card--compact {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
}

.membership-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.membership-card-head strong {
  flex: 1;
  min-width: 0;
}

.membership-manage {
  margin-top: 12px;
  width: 100%;
}

.membership-pass-link {
  flex-shrink: 0;
  color: var(--pink);
  font-size: 0.9rem;
  text-decoration: none;
}

.membership-pass-link:hover {
  text-decoration: underline;
}

.membership-email {
  margin: 0 0 12px;
}

.membership-card .actions {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}

.membership-card .actions .btn-ghost,
.membership-card .actions .btn-primary {
  flex: 1;
  width: auto;
  font-size: 0.85rem;
  min-height: 40px;
}

.pill-status {
  display: inline-block;
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 0.75rem;
  background: rgba(57, 255, 20, 0.15);
  color: var(--green);
}

.leaderboard-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.podium {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 8px;
  margin-bottom: 16px;
  align-items: end;
}

.podium-card {
  background: var(--black-soft);
  border-radius: var(--radius);
  padding: 12px 8px;
  text-align: center;
  font-size: 0.85rem;
}

.podium-card.first {
  order: 2;
  min-height: 100px;
  border: 1px solid var(--pink);
}

.podium-card.second {
  order: 1;
}

.podium-card.third {
  order: 3;
}

.rank-row {
  display: flex;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.rank-row.you {
  background: rgba(255, 45, 138, 0.1);
  margin: 0 -8px;
  padding: 12px 8px;
  border-radius: var(--radius);
}

.celebration-sheet {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, 0.6);
  display: none;
  align-items: flex-end;
  justify-content: center;
}

.celebration-sheet.open {
  display: flex;
}

.celebration-inner {
  width: 100%;
  max-width: var(--app-max);
  background: var(--black-soft);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  padding: 32px 24px calc(24px + env(safe-area-inset-bottom));
  text-align: center;
}

.toast {
  position: fixed;
  top: calc(16px + env(safe-area-inset-top));
  left: 50%;
  transform: translateX(-50%);
  max-width: calc(var(--app-max) - 32px);
  width: 90%;
  background: var(--black-soft);
  border-left: 4px solid var(--green);
  padding: 12px 16px;
  border-radius: var(--radius);
  z-index: 300;
  display: none;
}

.toast.show {
  display: block;
}

.hidden {
  display: none !important;
}

.section-title {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 24px 0 12px;
  font-size: 1rem;
  color: var(--muted);
}

.welcome-steps {
  max-width: var(--app-max);
  margin: 0 auto;
  padding: 24px;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  text-align: center;
  gap: 24px;
}

.welcome-video iframe {
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 0;
  border-radius: var(--radius-lg);
}

.meta {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.45;
}

.account-setup-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 16px;
  text-align: left;
}

.account-setup-form input[type="password"],
.account-setup-form input[type="text"],
.account-setup-form input[type="email"]:not(.account-email-readonly) {
  padding: 12px 16px;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: var(--black-soft);
  color: var(--white);
}

.account-email-field {
  text-align: left;
}

.account-field-label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}

.account-email-readonly {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.04);
  color: var(--muted);
  cursor: default;
}

.account-email-note {
  margin: 6px 0 0;
  font-size: 0.82rem;
}

/* ---------- Tablet (768px+) ---------- */

@media (min-width: 768px) {
  .app-root {
    max-width: 760px;
  }

  .bottom-nav {
    max-width: 760px;
  }

  .app-content {
    padding: 24px;
  }

  .class-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }

  .class-grid .class-card {
    flex-direction: column;
    margin-bottom: 0;
  }

  .class-grid .class-card img {
    width: 100%;
    aspect-ratio: 16 / 9;
    min-height: 0;
  }

  .class-grid .class-card-body {
    padding: 12px 16px 16px;
  }

  .landing-hero {
    max-width: 640px;
  }

  .landing-hero h1 {
    font-size: 3.25rem;
  }

  .welcome-steps {
    max-width: 640px;
  }

  .stat-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .celebration-sheet {
    align-items: center;
  }

  .celebration-inner {
    border-radius: var(--radius-lg);
    max-width: 480px;
  }
}

/* ---------- Desktop (1024px+): sidebar nav, wider content ---------- */

@media (min-width: 1024px) {
  .app-root {
    max-width: none;
    margin: 0 0 0 232px;
  }

  .top-bar {
    padding: 0 32px;
  }

  .app-content {
    width: 100%;
    max-width: 1080px;
    margin: 0 auto;
    padding: 32px;
    padding-bottom: 48px;
  }

  .bottom-nav {
    top: 0;
    bottom: 0;
    left: 0;
    right: auto;
    transform: none;
    width: 232px;
    max-width: none;
    height: 100dvh;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    gap: 4px;
    padding: 24px 12px;
    border-top: none;
    border-right: 1px solid rgba(255, 255, 255, 0.08);
  }

  .bottom-nav::before {
    content: "ZDP";
    font-family: var(--font-display);
    font-size: 1.5rem;
    letter-spacing: 0.1em;
    color: var(--pink);
    padding: 0 16px 20px;
  }

  .bottom-nav a,
  .bottom-nav button {
    flex-direction: row;
    justify-content: flex-start;
    gap: 12px;
    width: 100%;
    padding: 0 16px;
    border-radius: var(--radius);
    font-size: 0.9rem;
    letter-spacing: 0.04em;
  }

  .bottom-nav a.active,
  .bottom-nav button.active {
    background: rgba(255, 45, 138, 0.12);
  }

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

  .landing-hero {
    max-width: 720px;
  }

  .login-form {
    max-width: 420px;
    margin-left: auto;
    margin-right: auto;
    width: 100%;
  }

  /* Constrain reading-width content on wide screens */
  .membership-card,
  #account-form,
  .progress-ring-wrap,
  .podium,
  .rank-row,
  .leaderboard-tabs,
  #tab-content > .class-card {
    max-width: 680px;
  }

  /* Player: centred stage with scrollable details below */
  .player-header {
    padding: 16px 32px;
  }

  .player-body {
    padding: 0 32px 32px;
  }

  .player-frame {
    margin: 0 auto;
    max-width: 1200px;
    max-height: min(48vh, 680px);
  }

  .player-frame iframe {
    border-radius: var(--radius-lg);
  }

  .player-meta {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    padding-left: 0;
    padding-right: 0;
  }

  .toast {
    left: auto;
    right: 24px;
    transform: none;
  }
}

/* ---------- Very wide (1440px+) ---------- */

@media (min-width: 1440px) {
  .class-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}