/* Landing-specific layout built on top of the shared design system. */

/* Shared page frame */

.landing-page {
  --landing-frame-width: 1440px;
  --brand-logo-width: 222px;
  --landing-intro-top: 132px;
  --landing-copy-top-gap: 92px;
  --landing-copy-width: 1116px;
  --landing-copy-actions-gap: 153px;
  --landing-title-size: var(--font-size-title-lg);
  --landing-slogan-size: 36px;
  --landing-slogan-gap: 43px;
  --gate-top-padding: 26px;
  --gate-topbar-height: 198px;
  --gate-logo-offset: 39px;
  --gate-mark-width: 126px;
  --gate-card-top-gap: 52px;
  --gate-card-width: calc(var(--container-gate) + 24px);
  --gate-card-padding-top: 24px;
  --gate-card-padding-inline: 32px;
  --gate-card-padding-bottom: 32px;
  --gate-tabs-width: 944px;
  --gate-tabs-gap: 6px;
  --gate-tab-size: 31px;
  --gate-description-width: 660px;
  --gate-description-size: 21px;
  --gate-mockup-screen-height: 164px;
  --gate-mockup-stage-height: calc(var(--gate-mockup-stage-factor, 1.68) * var(--gate-mockup-screen-height));
  --gate-mockup-max-width: calc(100vw - 96px);
  --glow-top: 557px;
  --glow-top-gate: 575px;
  background: var(--color-page);
  min-height: 100dvh;
  margin: 0;
  overflow-x: hidden;
  overflow-y: auto;
}

.landing-shell {
  position: relative;
  min-height: 100dvh;
  overflow: clip;
}

.landing-viewport {
  position: relative;
  min-height: 100dvh;
  overflow: hidden;
}

.page-footer {
  position: relative;
  width: min(100% - 32px, 420px);
  min-height: 72px;
  margin: 0 auto;
  padding-block: 12px;
  text-align: center;
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-text);
  white-space: normal;
  z-index: 2;
}

.page-footer a {
  color: inherit;
  text-decoration-line: underline;
  text-decoration-color: rgba(77, 115, 239, .6);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.page-footer a:focus-visible {
  outline: 2px solid var(--color-brand-3);
  outline-offset: 3px;
}

/* Horizontal stage system */

.stage-slider {
  position: relative;
  z-index: 1;
  display: flex;
  width: 200%;
  align-items: flex-start;
  transition: transform 900ms var(--ease-out);
  will-change: transform;
}

.stage-slider.is-gate {
  transform: translateX(-50%);
}

.stage-panel {
  flex: 0 0 50%;
  width: 50%;
  min-width: 50%;
  min-height: 0;
  overflow: hidden;
  background: transparent;
}

.stage-panel[aria-hidden="true"] {
  height: 0;
  visibility: hidden;
}

.panel-frame {
  width: min(100%, var(--landing-frame-width));
  min-height: calc(100dvh - 72px);
  margin: 0 auto;
}

/* Shared decorative elements */

.landing-glow {
  position: absolute;
  top: var(--glow-top);
  left: 50%;
  width: 659px;
  height: 640px;
  border-radius: 50%;
  transform: translateX(-50%);
  background:
    radial-gradient(circle at 50% 40%, rgba(115, 241, 255, 0.78) 0%, rgba(115, 241, 255, 0.42) 35%, rgba(115, 241, 255, 0.15) 58%, rgba(115, 241, 255, 0) 76%);
  filter: blur(24px);
  opacity: 0.88;
  pointer-events: none;
  z-index: 0;
}

.landing-shell.is-gate .landing-glow {
  top: var(--glow-top-gate);
}

.brand-logo {
  display: block;
  width: var(--brand-logo-width);
  height: auto;
  object-fit: contain;
  filter: drop-shadow(0 10px 12px rgba(11, 18, 32, 0.2));
}

/* Landing panel */

.panel-frame--landing {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: max(96px, var(--landing-intro-top)) 20px 24px;
}

.panel-frame--landing > * {
  flex-shrink: 0;
}

.brand-logo--landing {
  margin-inline: auto;
}

.landing-copy {
  width: min(100%, var(--landing-copy-width));
  margin-top: var(--landing-copy-top-gap);
  text-align: center;
}

.landing-copy h1 {
  margin: 0;
  font-size: var(--landing-title-size);
  line-height: var(--line-height-heading);
  font-weight: var(--font-weight-bold);
  letter-spacing: var(--letter-spacing-heading);
}

.landing-brand-name {
  display: inline-block;
  white-space: nowrap;
}

.landing-slogan {
  margin: var(--landing-slogan-gap) 0 0;
  font-size: var(--landing-slogan-size);
  line-height: 1.5;
  font-weight: var(--font-weight-regular);
}

.landing-subtitle {
  margin: 8px 0 0;
  color: var(--color-text-muted);
  font-size: clamp(1rem, 1.5vw, 1.25rem);
  line-height: 1.5;
}

.landing-slogan .accent {
  color: var(--color-accent);
}

.landing-actions {
  margin-top: var(--landing-copy-actions-gap);
  display: flex;
  justify-content: center;
}

.landing-cta {
  min-width: 277px;
  font-size: 20px;
  font-weight: var(--font-weight-regular);
}

/* Gate panel */

.panel-frame--gate {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: calc(var(--gate-top-padding) + var(--gate-mark-width) * 171 / 237 + 24px) 0 24px;
}

.gate-topbar {
  position: absolute;
  top: var(--gate-top-padding);
  left: 0;
  width: 100%;
  min-height: 44px;
  display: grid;
  grid-template-columns: 42px 1fr auto;
  align-items: start;
  padding-inline: 20px;
  box-sizing: border-box;
}

.brand-logo--gate {
  width: var(--gate-mark-width);
  justify-self: end;
}

.back-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  transition: background-color 200ms ease, transform 200ms var(--ease-out);
}

.back-link:hover {
  background: var(--color-accent-soft);
  transform: translateX(-2px);
}

.back-link span {
  display: inline-block;
  width: 16px;
  height: 16px;
  margin-left: 6px;
  border-left: 4px solid var(--color-accent);
  border-bottom: 4px solid var(--color-accent);
  transform: rotate(45deg);
}

.gate-card {
  position: relative;
  flex-shrink: 0;
  isolation: isolate;
  width: min(90%, var(--gate-card-width));
  margin: 0 auto;
  padding: var(--gate-card-padding-top) 0 var(--gate-card-padding-bottom);
  display: grid;
  justify-items: center;

  border: 1px solid rgba(63, 106, 255, 0.18);
  border-radius: 32px;
  background: rgba(255, 255, 255, 0.20);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  box-shadow:
    0 18px 48px rgba(12, 20, 36, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.28);

  overflow: hidden;
}

.gate-card::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 50% 78%, rgba(115, 241, 255, 0.16) 0%, rgba(115, 241, 255, 0.08) 28%, rgba(115, 241, 255, 0) 62%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.14), rgba(255, 255, 255, 0.08));
  pointer-events: none;
}

.gate-tabs {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  width: min(100%, var(--gate-tabs-width));
  margin: 0 auto;
  align-items: start;
  gap: var(--gate-tabs-gap);
}

.gate-tab {
  position: relative;
  padding: 14px 0 18px;
  font-size: var(--gate-tab-size);
  line-height: 1.2;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  text-align: center;
  letter-spacing: -0.04em;
  transition: color 220ms ease, transform 220ms var(--ease-out);
}

.gate-tab::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 2px;
  width: 0;
  height: 4px;
  border-radius: 999px;
  transform: translateX(-50%);
  background: linear-gradient(90deg, var(--color-brand-2), var(--color-brand-3));
  transition: width 220ms var(--ease-out);
}

.gate-tab:hover {
  transform: translateY(-1px);
}

.gate-tab.is-active {
  color: var(--color-accent);
}

.gate-tab.is-active::after {
  width: 84px;
}

.gate-body {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  width: 100%;
  margin: 14px auto 0;
  gap: 20px 14px;
}

.gate-description {
  grid-column: 1 / -1;
  width: min(100%, var(--gate-description-width));
  min-height: calc(2 * 1.35em);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: var(--gate-description-size);
  line-height: 1.35;
  font-weight: var(--font-weight-regular);
  color: var(--color-text);
  transition: opacity 220ms ease, transform 220ms ease;
}

.gate-description.is-swapping {
  opacity: 0;
  transform: translateY(8px);
}

.gate-media-note {
  grid-column: 1 / -1;
  width: min(100%, 700px);
  margin: -4px auto 0;
  display: grid;
  justify-items: center;
  gap: 8px;
  padding: 10px 14px;
  border: 1px solid rgba(22, 102, 168, .18);
  border-radius: 14px;
  background: rgba(244, 255, 253, .68);
  color: var(--color-text-muted);
  text-align: center;
  font-size: 13px;
  line-height: 1.45;
}

.gate-media-note[hidden] {
  display: none;
}

.gate-media-note p {
  margin: 0;
}

.gate-media-note__action {
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--color-brand-1);
  font: inherit;
  font-weight: var(--font-weight-semibold);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.gate-media-note__action:hover {
  color: var(--color-accent);
}

.gate-media-note__action:focus-visible {
  outline: 2px solid var(--color-brand-1);
  outline-offset: 3px;
}

.media-dialog {
  width: min(92vw, 760px);
  max-height: min(92dvh, 920px);
  padding: 0;
  overflow: auto;
  border: 1px solid rgba(22, 102, 168, .2);
  border-radius: var(--radius-card-lg);
  background: var(--color-page);
  color: var(--color-text);
  box-shadow: 0 28px 80px rgba(11, 18, 32, .24);
}

.media-dialog::backdrop {
  background: rgba(8, 15, 28, .52);
  backdrop-filter: blur(4px);
}

.media-dialog__content {
  position: relative;
  display: flex;
  flex-direction: column;
  max-height: min(calc(92dvh - 2px), 918px);
  overflow-y: auto;
  overscroll-behavior: contain;
  gap: 12px;
  padding: clamp(24px, 4vw, 38px);
}

.media-dialog__content h2,
.media-dialog__content p {
  margin: 0;
  flex-shrink: 0;
  overflow-wrap: anywhere;
}

.media-dialog__content img {
  display: block;
  width: min(100%, 620px);
  max-height: min(52dvh, 560px);
  min-height: min(120px, 20dvh);
  flex-shrink: 1;
  object-fit: contain;
  height: auto;
  margin: 4px auto 0;
  border-radius: 18px;
}

.media-dialog__close {
  position: sticky;
  z-index: 1;
  top: 0;
  align-self: flex-end;
  flex-shrink: 0;
  display: grid;
  width: 44px;
  height: 44px;
  padding: 0;
  place-items: center;
  border: 1px solid rgba(11, 18, 32, .12);
  border-radius: 50%;
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 1.5rem;
  line-height: 1;
}

.media-dialog__close:hover {
  background: var(--color-page-home);
}

.media-dialog__close:focus-visible {
  outline: 3px solid var(--color-brand-1);
  outline-offset: 3px;
}

.gate-media-row {
  grid-column: 1 / -1;
  width: 100%;
}

.gate-media-stage {
  position: relative;
  width: 100%;
  min-height: var(--gate-mockup-stage-height);
  overflow: hidden;
}

.gate-video-shell {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 220ms ease;
}

.gate-video-shell.is-mounted {
  visibility: visible;
}

.gate-video-shell.is-visible {
  opacity: 1;
  pointer-events: auto;
}

.gate-video-shell.is-mounted:not(.is-visible) .video-mockup {
  opacity: 0;
  transform: translateY(8px);
}

.video-mockup-anchor {
  position: absolute;
  top: 50%;
  left: var(--mockup-left, 0px);
  transform: translateY(-50%);
}

.video-mockup {
  --mockup-aspect-ratio: 1333 / 652;
  --mockup-width-factor: 2.812236;
  --mockup-screen-left: 26.7067%;
  --mockup-screen-top: 14.8773%;
  --mockup-screen-width: 69.4674%;
  --mockup-screen-height: 72.6994%;
  --mockup-screen-radius: 0px;
  --mockup-video-scale: 1;
  --mockup-video-offset-x: 0px;
  --mockup-video-offset-y: 0px;
  position: relative;
  display: block;
  width: min(var(--gate-mockup-max-width), calc(var(--mockup-width-factor) * var(--gate-mockup-screen-height)));
  aspect-ratio: var(--mockup-aspect-ratio);
  isolation: isolate;
  transition: opacity 220ms ease, transform 220ms ease;
}

.video-mockup__screen {
  position: absolute;
  left: var(--mockup-screen-left);
  top: var(--mockup-screen-top);
  width: var(--mockup-screen-width);
  height: var(--mockup-screen-height);
  overflow: hidden;
  border-radius: var(--mockup-screen-radius);
  background: rgba(8, 15, 28, 0.96);
  z-index: 0;
}

.video-mockup__frame {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  box-shadow: none;
  pointer-events: none;
  z-index: 1;
}

.gate-video-player {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 0;
  box-shadow: none;
  background: rgba(8, 15, 28, 0.96);
  transform: translate(var(--mockup-video-offset-x), var(--mockup-video-offset-y)) scale(var(--mockup-video-scale));
  transform-origin: center center;
}

.gate-video-state {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 6px;
  padding: 8px;
  background: rgba(8, 15, 28, 0.9);
  color: var(--color-page);
  text-align: center;
}

.gate-video-state[hidden],
.gate-video-retry[hidden],
.gate-video-state__spinner[hidden] {
  display: none;
}

.gate-video-state p {
  max-width: 34ch;
  margin: 0;
  font-size: 12px;
  line-height: 1.35;
}

.gate-video-state__spinner {
  width: 28px;
  height: 28px;
  border: 2px solid rgba(244, 255, 253, 0.28);
  border-top-color: var(--color-brand-2);
  border-radius: 50%;
  animation: gate-video-spin 800ms linear infinite;
}

.gate-video-retry {
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid rgba(244, 255, 253, 0.5);
  border-radius: var(--radius-pill);
  background: var(--color-page);
  color: var(--color-text);
  font-size: 14px;
  font-weight: var(--font-weight-semibold);
}

.gate-video-retry:focus-visible {
  outline: 3px solid var(--color-brand-2);
  outline-offset: 3px;
}

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

.gate-access-wrap {
  grid-column: 1 / -1;
  justify-self: center;
  position: relative;
  display: grid;
  justify-items: center;
}

.gate-access {
  min-width: 214px;
  padding-inline: 22px 20px;
  font-size: 18px;
  transition: opacity 220ms ease, transform 220ms ease;
}

.gate-access.is-swapping {
  opacity: 0;
  transform: translateY(8px);
}

.gate-access.is-locked {
  border-color: rgba(11, 18, 32, 0.12);
  background: var(--color-surface-muted-strong);
  color: var(--color-text-muted);
  box-shadow: none;
  cursor: not-allowed;
  opacity: 0.76;
}

.gate-access.is-locked:hover,
.gate-access.is-locked:active {
  transform: none;
  box-shadow: none;
}

.gate-access.is-locked .button-arrow {
  border-color: currentColor;
  opacity: 0.62;
}

.gate-access-tooltip {
  position: absolute;
  left: 50%;
  bottom: calc(100% + 11px);
  z-index: 4;
  width: max-content;
  max-width: min(300px, calc(100vw - 32px));
  padding: 8px 11px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 10px;
  background: rgba(11, 18, 32, 0.94);
  color: var(--color-page);
  box-shadow: 0 8px 22px rgba(11, 18, 32, 0.16);
  font-size: 12px;
  font-weight: var(--font-weight-medium);
  line-height: 1.45;
  text-align: center;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translate(-50%, 5px);
  transition:
    opacity var(--duration-fast) ease,
    transform var(--duration-fast) var(--ease-out),
    visibility var(--duration-fast) ease;
}

.gate-access-tooltip::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  border: 6px solid transparent;
  border-top-color: rgba(11, 18, 32, 0.94);
  transform: translateX(-50%);
}

.gate-access-wrap.is-locked:hover .gate-access-tooltip,
.gate-access-wrap.is-locked:focus-within .gate-access-tooltip {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
}

/* Shared CTA ornament */

.button-arrow {
  width: 14px;
  height: 14px;
  margin-right: 2px;
  border-top: 4px solid var(--color-accent);
  border-right: 4px solid var(--color-accent);
  transform: rotate(45deg);
}

/* Responsive adjustments */

@media (max-width: 1200px), (max-height: 900px) {
  .landing-page {
    --landing-intro-top: 96px;
    --landing-copy-top-gap: 72px;
    --landing-copy-width: 980px;
    --landing-copy-actions-gap: 118px;
    --landing-title-size: 42px;
    --landing-slogan-size: 32px;
    --gate-top-padding: 20px;
    --gate-topbar-height: 180px;
    --gate-logo-offset: 28px;
    --gate-mark-width: 144px;
    --gate-card-top-gap: 36px;
    --gate-card-width: var(--container-gate);
    --gate-card-padding-top: 22px;
    --gate-card-padding-inline: 28px;
    --gate-card-padding-bottom: 28px;
    --gate-tabs-width: 884px;
    --gate-tab-size: 29px;
    --gate-description-width: 640px;
    --gate-description-size: 20px;
    --gate-mockup-screen-height: 154px;
    --gate-mockup-max-width: calc(100vw - 88px);
  }
}

@media (max-width: 960px), (max-height: 780px) {
  .landing-page {
    --brand-logo-width: 194px;
    --landing-intro-top: 64px;
    --landing-copy-top-gap: 44px;
    --landing-copy-width: 760px;
    --landing-copy-actions-gap: 72px;
    --landing-title-size: 38px;
    --landing-slogan-size: 28px;
    --landing-slogan-gap: 28px;
    --gate-top-padding: 18px;
    --gate-topbar-height: 136px;
    --gate-logo-offset: 18px;
    --gate-mark-width: 132px;
    --gate-card-top-gap: 20px;
    --gate-card-padding-top: 22px;
    --gate-card-padding-inline: 22px;
    --gate-card-padding-bottom: 24px;
    --gate-tabs-width: 100%;
    --gate-tabs-gap: 8px;
    --gate-tab-size: 22px;
    --gate-description-size: 19px;
    --gate-mockup-screen-height: 144px;
    --gate-mockup-max-width: calc(100vw - 72px);
    --glow-top: 62%;
    --glow-top-gate: 64%;
  }

  .gate-body {
    grid-template-columns: 1fr;
    width: 100%;
    gap: 16px;
  }

  .gate-tabs {
    width: 100%;
  }

  .gate-media-row,
  .gate-card[data-active-tab="ausecaf"] .gate-media-row,
  .gate-card[data-active-tab="secedi"] .gate-media-row,
  .gate-card[data-active-tab="diag82030"] .gate-media-row {
    grid-column: 1;
  }

  .gate-playback-meta {
    grid-column: 1;
  }
}

@media (max-width: 720px) {
  .landing-page {
    --brand-logo-width: 164px;
    --landing-intro-top: 42px;
    --landing-copy-top-gap: 28px;
    --landing-copy-width: 100%;
    --landing-copy-actions-gap: 48px;
    --landing-title-size: 34px;
    --landing-slogan-size: 24px;
    --gate-topbar-height: 122px;
    --gate-logo-offset: 12px;
    --gate-mark-width: 120px;
    --gate-card-top-gap: 18px;
    --gate-card-padding-top: 20px;
    --gate-card-padding-inline: 18px;
    --gate-card-padding-bottom: 22px;
    --gate-tabs-gap: 4px;
    --gate-tab-size: 17px;
    --gate-description-size: 18px;
    --gate-mockup-screen-height: 128px;
    --gate-mockup-max-width: calc(100vw - 56px);
  }

  .page-footer {
    white-space: normal;
    text-align: center;
    width: min(100% - 32px, 420px);
  }

  .gate-tab {
    padding: 10px 0 14px;
  }

  .gate-tab.is-active::after {
    width: 48px;
  }

  .landing-cta,
  .gate-access {
    min-width: 0;
    width: 100%;
  }

  .landing-cta,
  .gate-access-wrap {
    width: min(100%, 280px);
  }

  .gate-playback-meta {
    align-items: flex-start;
    gap: 8px;
    font-size: 12px;
  }

}

@media (max-width: 460px) {
  .landing-page {
    --gate-mark-width: 80px;
  }

  .gate-tabs {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2px 8px;
  }

  .gate-tab {
    min-height: 44px;
    padding: 8px 0;
  }
}

@media (pointer: coarse) {
  .page-footer a {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
  }
}

/* Motion accessibility */

@media (prefers-reduced-motion: reduce) {
  .stage-slider,
  .gate-description,
  .gate-video-shell,
  .video-mockup-anchor,
  .video-mockup,
  .pill-button,
  .gate-tab,
  .back-link,
  .gate-access,
  .gate-access-tooltip,
  .landing-glow {
    transition: none !important;
    animation: none !important;
  }

  .gate-video-state__spinner {
    animation-duration: 1.6s !important;
  }
}