/* SPA ROOT */
body.spa { overflow: hidden; }

.spa-main {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
  background: transparent;
}

/* Vignette */
.spa-main::before {
  content: "";
  position: absolute;
  inset: -10vh;
  z-index: 2;
  pointer-events: none;
  background: radial-gradient(circle at center,
    rgba(0, 0, 0, 0) 0%,
    rgba(0, 0, 0, 0.35) 45%,
    rgba(0, 0, 0, 0.75) 75%,
    rgba(0, 0, 0, 0.95) 100%
  );
}

/* CINEMA STAGE (global background) */
.cinema-stage {
  position: fixed;
  inset: -6vh -6vw;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.cinema-layer {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  filter: saturate(115%) contrast(112%) brightness(0.78);
  opacity: 0.55;
  transform: translate3d(0,0,0) scale(1.08);
  transition: transform 0.8s cubic-bezier(.22,.61,.36,1), opacity 0.8s ease;
  will-change: transform;
}

.cinema-layer.layer--back {
  display: none;
}

.cinema-layer.layer--mid {
  background-image: image-set(
    url("../images/pic13.avif") type("image/avif"),
    url("../images/pic13.jpg") type("image/jpeg")
  );
  opacity: 0.5;
  transform:
    translate3d(calc(var(--page-index) * -3.4%), calc(var(--parallax-y) * 22px), 0)
    scale(1.12);
}

.cinema-layer.layer--front {
  display: none;
}

.cinema-glow {
  position: absolute;
  inset: -10%;
  background:
    radial-gradient(circle at 20% 20%, rgba(214, 179, 107, 0.18), transparent 55%),
    radial-gradient(circle at 70% 30%, rgba(120, 20, 20, 0.18), transparent 60%),
    radial-gradient(circle at 60% 80%, rgba(40, 60, 110, 0.16), transparent 65%);
  mix-blend-mode: screen;
  opacity: 0.6;
}

/* STRIP */
.pages-strip {
  position: relative;
  z-index: 3;
  display: flex;
  height: 100%;
  width: 100%;
  transform: translate3d(0,0,0);
  transition: transform 0.7s cubic-bezier(0.22, 0.61, 0.36, 1);
  will-change: transform;
  pointer-events: none;
}

.page {
  flex: 0 0 100%;
  width: 100%;
  height: 100%;
  overflow: hidden;
  pointer-events: auto;
  min-height: 0;
}

.page--inner { overflow: hidden; }

/* inner scroll area */
.page-shell {
  height: 100%;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.page-body {
  flex: 1;
  overflow-y: auto;
  padding: 7rem 2.5rem 2.4rem;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  touch-action: pan-y;
  min-height: 0;
  height: 100%;
}

/* glass panel */
.page-panel {
  max-width: 1120px;
  margin: 0 auto;
  background: var(--panel);
  border-radius: 24px;
  padding: 3rem 3rem 2.6rem;
  box-shadow: var(--panel-shadow);
  border: 1px solid var(--panel-border);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  transform:
    translate3d(0,0,0)
    rotateX(calc(var(--parallax-y) * 1.2deg))
    rotateY(calc(var(--parallax-x) * -1.2deg));
  transition: transform 0.6s ease;
}

.page-panel__header { text-align: center; margin-bottom: 2.2rem; }
.page-panel__kicker {
  display: block;
  font-size: 0.76rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 1.2rem;
}
.page-panel__title {
  font-family: var(--font-display);
  font-size: 2.5rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  line-height: 1.08;
  margin: 0 0 1rem;
  color: var(--text-strong);
}
.page-panel__subtitle {
  max-width: 760px;
  margin: 0 auto;
  font-size: 0.96rem;
  line-height: 1.8;
  color: var(--text);
}

/* HEADER + FOOTER */
.spa-chrome{
  position: fixed;
  left: 0;
  right: 0;
  z-index: 60;
  transition: transform 0.35s cubic-bezier(.22,.61,.36,1), opacity 0.35s ease;
  will-change: transform, opacity;
}

.page-header{
  top: 0;
  padding: 1.1rem 2rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.65rem;
  background: rgba(5, 3, 12, 0.72);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 18px 60px rgba(0,0,0,0.65);
  transform: translateY(-110%);
  opacity: 0;
  pointer-events: none;
}

.page-header__name {
  font-family: var(--font-display);
  font-size: 0.78rem;
  letter-spacing: 0.42em;
  text-transform: uppercase;
  color: var(--text-strong);
}

.page-header__nav {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}

.page-footer{
  bottom: 0;
  padding: 0.95rem 2rem 1.1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.9rem;
  background: rgba(5, 3, 12, 0.78);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 -18px 60px rgba(0,0,0,0.6);
  transform: translateY(110%);
  opacity: 0;
  pointer-events: none;
}

body.is-inner .page-header,
body.is-inner .page-footer{
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

body.chrome-hidden .page-header {
  transform: translateY(-110%);
  opacity: 0;
  pointer-events: none;
}

body.chrome-hidden .page-footer {
  transform: translateY(120%);
  opacity: 0;
  pointer-events: none;
}

/* page inner spacing */
.page--inner .page-body{
  padding-top: 110px;
  padding-bottom: 96px;
}

/* Buttons */
.button, .nav-pill {
  border-radius: 10px;
  border: 1px solid rgba(214, 179, 107, 0.28);
  background: linear-gradient(145deg, rgba(12, 10, 20, 0.85), rgba(8, 6, 14, 0.68));
  color: var(--text-strong);
  padding: 0.75rem 2.2rem;
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  cursor: pointer;
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.7);
  transition: background 0.18s ease, border-color 0.18s ease, transform 0.1s ease, box-shadow 0.18s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.button:hover, .button:active, .nav-pill:hover, .nav-pill:active {
  background: linear-gradient(145deg, rgba(20, 16, 30, 0.95), rgba(10, 8, 18, 0.82));
  border-color: rgba(214, 179, 107, 0.55);
  transform: translateY(-1px);
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.9);
}

.nav-pill--active {
  border-color: rgba(214, 179, 107, 0.7);
  box-shadow: 0 18px 46px rgba(0, 0, 0, 1);
}

/* Footer links */
.footer-actions{
  display: flex;
  gap: .9rem;
  align-items: center;
  justify-content: center;
}

.footer-link{
  text-decoration: none;
  color: rgba(255,255,255,0.86);
  border: 1px solid rgba(214, 179, 107, 0.3);
  background: rgba(8,6,14,0.45);
  padding: 0.45rem 0.95rem;
  border-radius: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 0.68rem;
  transition: transform .12s ease, border-color .18s ease, background .18s ease;
}

.footer-link:hover{
  transform: translateY(-1px);
  border-color: rgba(214, 179, 107, 0.6);
  background: rgba(12,10,18,0.6);
}

.footer-copy{
  text-align: center;
  font-size: 0.62rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.55);
}

/* RESPONSIVE */
@media (max-width: 900px) {
  .page-body { padding: 6rem 1.6rem 2.2rem; }
  .page-panel { padding: 2.6rem 2rem 2.2rem; }
  .page-panel__title { font-size: 2.1rem; letter-spacing: 0.16em; }
  .cinema-layer{ transform: none; opacity: 0.45; }
}

@media (max-width: 640px) {
  .page-header__nav{ display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
  .page-header__nav .nav-pill{ width: 100%; height: 44px; }
  .page-body { padding: 6rem 1.2rem 2rem; }
  .page-panel { border-radius: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  .cinema-layer,
  .page-panel,
  .video-card,
  .lesson-card,
  .about-card {
    transition: none;
    transform: none;
  }
}