html, body { height: 100%; }

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(1100px 620px at 18% -12%, rgba(247,147,26,.10), transparent 58%),
    radial-gradient(820px 560px at 92% 0%, rgba(247,147,26,.07), transparent 54%),
    linear-gradient(180deg, #080808 0%, #050505 100%);
  color: #f8fafc;
}

/* Core shells */

.shell {
  background:
    linear-gradient(180deg, rgba(255,255,255,.045), rgba(255,255,255,.022));
  border: 1px solid rgba(247,147,26,.18);
  border-radius: 28px;
  backdrop-filter: blur(16px);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.04),
    0 28px 90px rgba(0,0,0,.44);
}

.panel {
  background:
    linear-gradient(180deg, rgba(255,255,255,.035), rgba(255,255,255,.02));
  border: 1px solid rgba(255,255,255,.05);
  backdrop-filter: blur(12px);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.025);
}

/* Lesson media */

.lesson-media-shell {
  background:
    radial-gradient(circle at top, rgba(247,147,26,.12), transparent 28%),
    linear-gradient(180deg, rgba(255,255,255,.035), rgba(255,255,255,.018));
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 24px;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.03),
    0 24px 80px rgba(0,0,0,.38);
  padding: 12px;
}

.lesson-media-shell:focus,
.lesson-media-shell:focus-visible,
.lesson-media-shell iframe:focus,
.lesson-media-shell iframe:focus-visible {
  outline: none !important;
}

.preview-video-shell {
  position: relative;
  height: 100%;
  border-radius: 22px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.10);
  background: #000;
}

.preview-video-shell iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
}

.preview-video-overlay {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background:
    linear-gradient(180deg, rgba(0,0,0,.04), rgba(0,0,0,.16));
  cursor: pointer;
  transition: background .18s ease;
}

.preview-video-overlay:hover {
  background:
    linear-gradient(180deg, rgba(0,0,0,.03), rgba(0,0,0,.12));
}

.preview-video-cta {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  border-radius: 9999px;
  padding: 12px 18px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(10,10,10,.74);
  color: #fff;
  box-shadow:
    0 16px 36px rgba(0,0,0,.30),
    inset 0 1px 0 rgba(255,255,255,.05);
  backdrop-filter: blur(10px);
  transition:
    transform .18s ease,
    border-color .18s ease,
    background .18s ease,
    box-shadow .18s ease;
}

.preview-video-overlay:hover .preview-video-cta {
  transform: translateY(-1px);
  border-color: rgba(247,147,26,.34);
  background: rgba(12,12,12,.80);
  box-shadow:
    0 20px 42px rgba(0,0,0,.36),
    0 0 0 1px rgba(247,147,26,.06);
}

.preview-video-cta-icon {
  display: inline-flex;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: 9999px;
  background: #f7931a;
  color: #fff;
  border: 1px solid rgba(255,255,255,.14);
  box-shadow:
    0 12px 28px rgba(247,147,26,.28),
    inset 0 1px 0 rgba(255,255,255,.18);
  flex: 0 0 auto;
  font-size: 18px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
}

.preview-video-cta-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.1;
}

.preview-video-cta-copy strong {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.01em;
}

.preview-video-cta-copy span {
  margin-top: 4px;
  font-size: 12px;
  color: rgba(255,255,255,.62);
}

@media (max-width: 640px) {
  .preview-video-overlay {
    align-items: flex-end;
    justify-content: center;
    padding: 12px;
    background:
      linear-gradient(180deg, rgba(0,0,0,.02), rgba(0,0,0,.18));
  }

  .preview-video-cta {
    width: 100%;
    max-width: 320px;
    justify-content: flex-start;
    padding: 10px 12px;
    gap: 10px;
    border-radius: 18px;
    background: rgba(10,10,10,.70);
    box-shadow:
      0 14px 28px rgba(0,0,0,.28),
      inset 0 1px 0 rgba(255,255,255,.04);
  }

  .preview-video-cta-icon {
    width: 36px;
    height: 36px;
    box-shadow: 0 10px 22px rgba(247,147,26,.22);
  }

  .preview-video-cta-copy strong {
    font-size: 12.5px;
  }

  .preview-video-cta-copy span {
    font-size: 10.5px;
    line-height: 1.2;
  }
}

/* Dashboard gate */

.dashboard-gate-surface {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at top right, rgba(247,147,26,.12), transparent 34%),
    radial-gradient(circle at bottom left, rgba(255,255,255,.035), transparent 30%),
    linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.024));
  border: 1px solid rgba(255,255,255,.08);
  box-shadow:
    0 32px 100px rgba(0,0,0,.56),
    inset 0 1px 0 rgba(255,255,255,.05);
  backdrop-filter: blur(24px);
}

.dashboard-gate-surface::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(255,255,255,.03), transparent 30%);
}

.dashboard-gate-close {
  transition:
    background 160ms ease,
    border-color 160ms ease,
    color 160ms ease,
    transform 160ms ease,
    box-shadow 160ms ease;
}

.dashboard-gate-close:hover {
  transform: translateY(-1px);
  background: rgba(255,255,255,.08);
  border-color: rgba(255,255,255,.16);
  box-shadow: 0 10px 22px rgba(0,0,0,.20);
}

.dashboard-gate-kicker {
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: #f0b35e;
}

.dashboard-gate-title {
  letter-spacing: -.035em;
  line-height: 1.02;
}

.dashboard-gate-copy {
  color: rgba(255,255,255,.66);
}

.dashboard-gate-cta-primary {
  display: inline-flex;
  width: 100%;
  align-items: center;
  justify-content: center;
  border-radius: 18px;
  padding: 1.08rem 1.2rem;
  font-size: .97rem;
  font-weight: 600;
  letter-spacing: -.01em;
  color: #111;
  background: linear-gradient(180deg, #f7b267 0%, #f59e0b 100%);
  box-shadow:
    0 18px 48px rgba(247,147,26,.30),
    inset 0 1px 0 rgba(255,255,255,.35);
  transition:
    transform 160ms ease,
    box-shadow 160ms ease,
    filter 160ms ease;
}

.dashboard-gate-cta-primary:hover {
  transform: translateY(-1px);
  box-shadow:
    0 22px 56px rgba(247,147,26,.36),
    inset 0 1px 0 rgba(255,255,255,.35);
  filter: brightness(1.03);
}

.dashboard-gate-cta-primary:active {
  transform: translateY(0);
}

.dashboard-gate-cta-secondary {
  display: inline-flex;
  width: 100%;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  padding: .98rem 1rem;
  font-size: .95rem;
  font-weight: 600;
  letter-spacing: -.01em;
  color: rgba(255,255,255,.92);
  background: linear-gradient(180deg, rgba(255,255,255,.045), rgba(255,255,255,.025));
  border: 1px solid rgba(255,255,255,.10);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.04),
    0 10px 24px rgba(0,0,0,.18);
  transition:
    transform 160ms ease,
    background 160ms ease,
    border-color 160ms ease,
    box-shadow 160ms ease;
}

.dashboard-gate-cta-secondary:hover {
  transform: translateY(-1px);
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.03));
  border-color: rgba(255,255,255,.15);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.05),
    0 14px 30px rgba(0,0,0,.22);
}

.dashboard-gate-footnote {
  color: rgba(255,255,255,.44);
}

@media (max-width: 640px) {
  .dashboard-gate-surface {
    border-radius: 24px;
  }
}

/* Completion shell */

.completion-shell {
  background:
    radial-gradient(circle at top right, rgba(247,147,26,.16), transparent 46%),
    linear-gradient(180deg, rgba(247,147,26,.12), rgba(255,255,255,.03));
  border: 1px solid rgba(247,147,26,.22);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.03),
    0 24px 80px rgba(0,0,0,.38);
  backdrop-filter: blur(14px);
}

/* Cards and rails */

.lesson-list-item,
.roadmap-card,
.rail-item,
.stage-syllabus-item {
  background: rgba(255,255,255,.025);
  border: 1px solid rgba(255,255,255,.07);
  transition: transform .18s ease, border-color .18s ease, background .18s ease;
}

.lesson-list-item:hover,
.roadmap-card:hover,
.rail-item:hover,
.stage-syllabus-item:hover {
  transform: translateY(-1px);
  border-color: rgba(255,255,255,.12);
  background: rgba(255,255,255,.035);
}

.lesson-list-item-current,
.roadmap-card-current,
.rail-item-current,
.stage-syllabus-item-current {
  border-color: rgba(247,147,26,.30);
  background:
    linear-gradient(180deg, rgba(247,147,26,.10), rgba(255,255,255,.02));
  box-shadow: 0 12px 32px rgba(0,0,0,.18);
}

.lesson-list-item-complete,
.roadmap-card-complete,
.rail-item-completed {
  border-color: rgba(255,255,255,.11);
}

.roadmap-shell,
.stage-syllabus-shell,
.stage-progress-shell,
.lesson-rail-shell {
  background:
    linear-gradient(180deg, rgba(255,255,255,.035), rgba(255,255,255,.02));
  border: 1px solid rgba(255,255,255,.08);
  backdrop-filter: blur(10px);
}

.transition-shell,
.recommended-next-shell,
.next-step-shell,
.stage-intro-accent,
.lesson-context-shell {
  background:
    radial-gradient(circle at top right, rgba(247,147,26,.16), transparent 48%),
    linear-gradient(180deg, rgba(247,147,26,.14), rgba(255,255,255,.03));
  border: 1px solid rgba(247,147,26,.22);
  box-shadow: 0 18px 40px rgba(0,0,0,.24);
}

.next-step-shell {
  transition: transform .18s ease, border-color .18s ease, background .18s ease;
}

.next-step-shell:hover {
  transform: translateY(-1px);
  border-color: rgba(247,147,26,.30);
  background:
    radial-gradient(circle at top right, rgba(247,147,26,.18), transparent 50%),
    linear-gradient(180deg, rgba(247,147,26,.16), rgba(255,255,255,.04));
}

.celebration-badge,
.recommended-next-badge,
.next-step-badge {
  background: rgba(247,147,26,.14);
  border: 1px solid rgba(247,147,26,.24);
}

.stage-intro-stat {
  background: rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.08);
}

.stage-intro-pill {
  border: 1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.05);
}

.stage-outline-cta,
.lesson-rail-toggle {
  background:
    linear-gradient(180deg, rgba(247,147,26,.12), rgba(255,255,255,.03));
  border: 1px solid rgba(247,147,26,.18);
  box-shadow: 0 10px 30px rgba(0,0,0,.18);
  transition: transform .18s ease, background .18s ease, border-color .18s ease;
}

.stage-outline-cta:hover,
.lesson-rail-toggle:hover {
  transform: translateY(-1px);
  background:
    linear-gradient(180deg, rgba(247,147,26,.18), rgba(255,255,255,.05));
  border-color: rgba(247,147,26,.30);
}

.rail-overflow-item.hidden {
  display: none;
}

/* Animations */

@keyframes badgeReveal {
  0% {
    opacity: 0;
    transform: scale(.86) translateY(14px);
    filter: blur(6px);
  }
  60% {
    opacity: 1;
    transform: scale(1.04) translateY(0);
    filter: blur(0);
  }
  100% {
    opacity: 1;
    transform: scale(1);
    filter: blur(0);
  }
}

.animate-badge-reveal {
  animation: badgeReveal 650ms cubic-bezier(.22, 1, .36, 1) forwards;
}

@keyframes uiFade {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes uiRise {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.ui-fade {
  animation: uiFade .22s ease;
}

.ui-rise {
  animation: uiRise .28s ease;
}

.shadow-soft {
  box-shadow: 0 20px 70px rgba(0,0,0,.65);
}

/* Scrollbars */

.premium-scroll {
  scrollbar-width: thin;
  scrollbar-color: rgba(247,147,26,.55) rgba(255,255,255,.04);
}

.premium-scroll::-webkit-scrollbar {
  width: 10px;
}

.premium-scroll::-webkit-scrollbar-track {
  background: rgba(255,255,255,.04);
  border-radius: 999px;
}

.premium-scroll::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, rgba(247,147,26,.9), rgba(247,147,26,.55));
  border-radius: 999px;
  border: 2px solid rgba(0,0,0,.18);
}

.premium-scroll::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, rgba(247,147,26,1), rgba(247,147,26,.7));
}

.premium-scroll::-webkit-scrollbar-corner {
  background: transparent;
}

/* Unit briefing */

.unit-briefing-backdrop {
  position: fixed;
  inset: 0;
  z-index: 110;
  background: rgba(0,0,0,.78);
  backdrop-filter: blur(14px);
}

.unit-briefing-modal {
  position: fixed;
  inset: 0;
  z-index: 120;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 16px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.unit-briefing-surface {
  position: relative;
  width: 100%;
  max-width: 760px;
  margin: auto 0;
  overflow: hidden;
  border-radius: 30px;
  border: 1px solid rgba(255,255,255,.08);
  background:
    radial-gradient(circle at top right, rgba(247,147,26,.14), transparent 34%),
    radial-gradient(circle at bottom left, rgba(255,255,255,.03), transparent 28%),
    linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.025));
  box-shadow:
    0 36px 110px rgba(0,0,0,.58),
    inset 0 1px 0 rgba(255,255,255,.05);
  backdrop-filter: blur(24px);
}

.unit-briefing-close {
  transition:
    background 160ms ease,
    border-color 160ms ease,
    transform 160ms ease;
}

.unit-briefing-close:hover {
  transform: translateY(-1px);
  background: rgba(255,255,255,.08);
  border-color: rgba(255,255,255,.16);
}

.unit-briefing-kicker {
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: #f0b35e;
}

.unit-briefing-title {
  letter-spacing: -.04em;
  line-height: 1.02;
}

.unit-briefing-copy {
  color: rgba(255,255,255,.72);
}

.unit-briefing-stat {
  border: 1px solid rgba(255,255,255,.08);
  background: rgba(255,255,255,.04);
}

.unit-briefing-highlight {
  border: 1px solid rgba(247,147,26,.20);
  background:
    linear-gradient(180deg, rgba(247,147,26,.12), rgba(255,255,255,.03));
  box-shadow: 0 18px 40px rgba(0,0,0,.22);
}

.unit-briefing-primary {
  display: inline-flex;
  width: 100%;
  align-items: center;
  justify-content: center;
  border-radius: 18px;
  padding: 1rem 1.15rem;
  font-size: .96rem;
  font-weight: 600;
  letter-spacing: -.01em;
  color: #111;
  background: linear-gradient(180deg, #f7b267 0%, #f59e0b 100%);
  box-shadow:
    0 18px 46px rgba(247,147,26,.30),
    inset 0 1px 0 rgba(255,255,255,.35);
  transition:
    transform 160ms ease,
    box-shadow 160ms ease,
    filter 160ms ease;
}

.unit-briefing-primary:hover {
  transform: translateY(-1px);
  box-shadow:
    0 22px 54px rgba(247,147,26,.36),
    inset 0 1px 0 rgba(255,255,255,.35);
  filter: brightness(1.03);
}

.unit-briefing-secondary {
  display: inline-flex;
  width: 100%;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  padding: .95rem 1rem;
  font-size: .95rem;
  font-weight: 600;
  color: #111;
  background: linear-gradient(180deg, #f7b267 0%, #f59e0b 100%);
  border: 1px solid rgba(255,255,255,.14);
  box-shadow:
    0 14px 34px rgba(247,147,26,.22),
    inset 0 1px 0 rgba(255,255,255,.28);
  transition:
    transform 160ms ease,
    box-shadow 160ms ease,
    filter 160ms ease;
}

.unit-briefing-secondary:hover {
  transform: translateY(-1px);
  box-shadow:
    0 18px 40px rgba(247,147,26,.28),
    inset 0 1px 0 rgba(255,255,255,.28);
  filter: brightness(1.03);
}

@media (max-width: 640px) {
  .unit-briefing-modal {
    align-items: flex-start;
    padding: 12px;
  }

  .unit-briefing-surface {
    margin: 12px 0;
    border-radius: 24px;
  }
}

@media (min-width: 641px) {
  .unit-briefing-modal {
    align-items: center;
  }
}

/* Badge showcase — premium / world class */

.badge-showcase {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 0%, rgba(247,147,26,.18), transparent 34%),
    radial-gradient(circle at 50% 38%, rgba(247,147,26,.08), transparent 48%),
    linear-gradient(180deg, rgba(24,16,8,.98), rgba(7,7,7,.99) 62%, rgba(4,4,4,1));
  border: 1px solid rgba(247,147,26,.18);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.05),
    inset 0 -1px 0 rgba(247,147,26,.06),
    0 34px 90px rgba(0,0,0,.42);
}

.badge-showcase::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(255,255,255,.03), transparent 24%),
    radial-gradient(circle at 50% 14%, rgba(255,220,150,.10), transparent 22%);
}

.badge-showcase-kicker {
  position: relative;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 11px 18px;
  border-radius: 999px;
  border: 1px solid rgba(247,147,26,.18);
  background:
    linear-gradient(180deg, rgba(255,255,255,.07), rgba(255,255,255,.025));
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.08),
    0 12px 28px rgba(0,0,0,.24);
  color: #f0b35e;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
}

.badge-showcase-kicker-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: #f7931a;
  box-shadow:
    0 0 0 4px rgba(247,147,26,.12),
    0 0 14px rgba(247,147,26,.65);
  flex: 0 0 auto;
}

.badge-showcase-frame {
  position: relative;
  width: 100%;
  max-width: 460px;
  margin: 0 auto;
  padding: 22px;
  border-radius: 32px;
  background:
    radial-gradient(circle at 50% 16%, rgba(255,210,120,.18), transparent 34%),
    linear-gradient(180deg, rgba(186,126,36,.42), rgba(110,68,14,.22) 52%, rgba(18,18,18,.22));
  border: 1px solid rgba(247,147,26,.26);
  box-shadow:
    0 30px 80px rgba(0,0,0,.36),
    inset 0 1px 0 rgba(255,255,255,.14),
    inset 0 -18px 40px rgba(0,0,0,.10);
}

.badge-showcase-frame::before {
  content: "";
  position: absolute;
  inset: 12px;
  border-radius: 24px;
  border: 1px solid rgba(255,255,255,.10);
  background: linear-gradient(180deg, rgba(255,255,255,.03), transparent 38%);
  pointer-events: none;
}

.badge-showcase-frame::after {
  content: "";
  position: absolute;
  inset: -30% 18% auto;
  height: 160px;
  background: radial-gradient(circle, rgba(255,220,150,.18), transparent 70%);
  filter: blur(26px);
  pointer-events: none;
}

.badge-stage {
  position: relative;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 0;
  padding: 8px 0;
}

.badge-stage-glow {
  position: absolute;
  inset: 14% 18%;
  border-radius: 28px;
  background:
    radial-gradient(circle, rgba(247,147,26,.24) 0%, rgba(247,147,26,.10) 36%, transparent 72%);
  filter: blur(30px);
  pointer-events: none;
}

.badge-stage-image {
  position: relative;
  z-index: 2;
  width: min(100%, 300px);
  height: auto;
  display: block;
  filter:
    drop-shadow(0 30px 70px rgba(0,0,0,.55))
    drop-shadow(0 12px 28px rgba(247,147,26,.12));
}

@media (max-width: 640px) {
  .badge-showcase-frame {
    max-width: 320px;
    padding: 16px;
    border-radius: 24px;
  }

  .badge-showcase-frame::before {
    inset: 9px;
    border-radius: 18px;
  }

  .badge-stage-image {
    width: min(100%, 220px);
  }
}

/* iOS app WebView polish */

@media (max-width: 640px) {
  header a:first-child,
  header button:first-child {
    margin-left: 10px;
  }

  header {
    padding-top: max(18px, env(safe-area-inset-top));
  }

  .dashboard-progress-row,
  .progress-row {
    display: flex;
    align-items: baseline;
    gap: 18px;
    flex-wrap: nowrap;
  }

  .dashboard-progress-row *,
  .progress-row * {
    white-space: nowrap;
  }
}

.app-back-button {
  position: fixed;
  left: 18px;
  bottom: calc(22px + env(safe-area-inset-bottom));
  z-index: 9999;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  height: 48px;
  padding: 0 16px 0 14px;
  border-radius: 999px;
  border: 1px solid rgba(247,147,26,.28);
  background:
    radial-gradient(circle at 20% 0%, rgba(247,147,26,.18), transparent 42%),
    rgba(8,8,10,.86);
  color: rgba(255,255,255,.92);
  font-size: 14px;
  font-weight: 650;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow:
    0 18px 44px rgba(0,0,0,.38),
    inset 0 1px 0 rgba(255,255,255,.08);
}

.app-back-button:active {
  transform: scale(.97);
}

.app-back-button-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 999px;
  background: rgba(247,147,26,.14);
  color: #f7931a;
  font-size: 15px;
}

@media (min-width: 900px) {
  .app-back-button {
    display: none;
  }
}