:root {
  --ink: #10161d;
  --muted: #5c6772;
  --paper: #f7efe2;
  --panel: rgba(255, 250, 239, 0.82);
  --panel-strong: rgba(255, 250, 239, 0.94);
  --accent: #e55f2a;
  --accent-dark: #a43a18;
  --sea: #0a6f77;
  --sky: #8fc9d2;
  --line: rgba(16, 22, 29, 0.15);
  --shadow: 0 26px 80px rgba(16, 22, 29, 0.28);
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Avenir Next", "Gill Sans", "Trebuchet MS", sans-serif;
  background:
    radial-gradient(circle at 14% 16%, rgba(229, 95, 42, 0.32), transparent 28rem),
    radial-gradient(circle at 88% 20%, rgba(10, 111, 119, 0.34), transparent 32rem),
    linear-gradient(135deg, #f4e6d0 0%, #d9eef0 45%, #f9c491 100%);
  overflow: hidden;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  background-image:
    linear-gradient(rgba(16, 22, 29, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 22, 29, 0.05) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.8), transparent);
}

button,
input,
select {
  font: inherit;
}

button,
.file-button {
  border: 0;
  border-radius: 999px;
  color: #fff7ed;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  box-shadow: 0 12px 28px rgba(164, 58, 24, 0.26);
  cursor: pointer;
  transition: transform 180ms ease, box-shadow 180ms ease, filter 180ms ease;
}

button:hover,
.file-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 34px rgba(164, 58, 24, 0.32);
  filter: saturate(1.08);
}

button:active,
.file-button:active {
  transform: translateY(0);
}

button:focus-visible,
input:focus-visible,
.file-button:focus-within {
  outline: 3px solid rgba(10, 111, 119, 0.36);
  outline-offset: 3px;
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(320px, 420px) minmax(0, 1fr);
  gap: 24px;
  width: min(1560px, calc(100vw - 36px));
  height: min(900px, calc(100vh - 36px));
  margin: 18px auto;
}

.hero-panel,
.viewer-card {
  border: 1px solid rgba(255, 255, 255, 0.42);
  border-radius: 34px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(22px);
}

.hero-panel {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 26px;
  background: var(--panel);
  animation: rise-in 700ms ease both;
  overflow: auto;
}

.brand {
  display: grid;
  gap: 12px;
}

.eyebrow {
  width: fit-content;
  margin: 0;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--sea);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.16em;
}

h1 {
  margin: 0;
  max-width: 100%;
  font-size: clamp(1.5rem, 2.45vw, 2.35rem);
  line-height: 1.08;
  letter-spacing: 0.03em;
  white-space: nowrap;
}

.lede {
  margin: 0;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.72;
}

.controls {
  display: grid;
  gap: 12px;
}

.file-button {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  font-weight: 800;
  overflow: hidden;
}

.file-button input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

.url-form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  padding: 7px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.58);
}

.url-form input {
  min-width: 0;
  border: 0;
  padding: 0 12px;
  color: var(--ink);
  background: transparent;
}

.url-form input::placeholder {
  color: rgba(92, 103, 114, 0.7);
}

.url-form button {
  min-height: 40px;
  padding: 0 16px;
  white-space: nowrap;
}

.projection-row {
  display: grid;
  gap: 8px;
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: 22px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.38);
  font-size: 0.9rem;
  font-weight: 900;
}

.projection-row select {
  width: 100%;
  min-height: 42px;
  border: 0;
  border-radius: 999px;
  padding: 0 14px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.72);
  font-weight: 900;
}

.video-panel {
  display: grid;
  gap: 10px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.38);
}

.zoom-row input {
  accent-color: var(--sea);
}

.video-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.speed-control {
  min-height: 40px;
  padding: 0 14px;
  border-radius: 999px;
  font-weight: 800;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.52;
  transform: none;
  box-shadow: none;
}

.speed-control {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  color: var(--muted);
  background: rgba(255, 255, 255, 0.48);
}

.speed-control select {
  border: 0;
  color: var(--ink);
  background: transparent;
  font-weight: 900;
}

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

.quick-actions button,
.toggle,
.select-control {
  min-height: 40px;
  padding: 0 14px;
  border-radius: 999px;
  font-weight: 800;
}

.quick-actions button {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.6);
  box-shadow: none;
}

.quick-actions button.is-active {
  color: #fff7ed;
  background: linear-gradient(135deg, var(--sea), #06454c);
}

.viewer-actions {
  position: absolute;
  top: 18px;
  right: 18px;
  z-index: 3;
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
  max-width: calc(100% - 36px);
}

.viewer-actions button {
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: rgba(255, 250, 239, 0.94);
  background: rgba(4, 13, 17, 0.5);
  box-shadow: 0 12px 26px rgba(4, 13, 17, 0.2);
  font-weight: 900;
  backdrop-filter: blur(16px);
}

.viewer-actions button:hover {
  background: rgba(229, 95, 42, 0.78);
}

.toggle,
.select-control {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.48);
}

.toggle input {
  width: 16px;
  height: 16px;
  accent-color: var(--sea);
}

.select-control {
  color: var(--muted);
}

.select-control select {
  max-width: 118px;
  border: 0;
  color: var(--ink);
  background: transparent;
  font-weight: 900;
}

.hint-panel {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.32);
}

.hint-panel span {
  padding: 7px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.5);
  font-size: 0.82rem;
  font-weight: 900;
}

.zoom-row {
  display: grid;
  grid-template-columns: auto minmax(100px, 1fr) 44px;
  align-items: center;
  gap: 12px;
  color: var(--muted);
  font-size: 0.94rem;
  font-weight: 800;
}

.status {
  margin: auto 0 0;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 18px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.46);
  line-height: 1.5;
}

.status.is-error {
  color: #8f1d13;
  background: rgba(255, 235, 229, 0.82);
}

.status.is-success {
  color: #0b6464;
}

.viewer-card {
  position: relative;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  background:
    radial-gradient(circle at 28% 18%, rgba(255, 255, 255, 0.18), transparent 28rem),
    linear-gradient(145deg, #071116 0%, #0b2730 54%, #0c1718 100%);
  animation: rise-in 700ms 120ms ease both;
}

.viewer-card.is-dragging {
  outline: 3px solid rgba(229, 95, 42, 0.82);
  outline-offset: -12px;
}

#panoCanvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: grab;
  touch-action: none;
}

#panoCanvas:active {
  cursor: grabbing;
}

.viewer-progress {
  position: absolute;
  right: 18px;
  bottom: 18px;
  left: 18px;
  display: grid;
  grid-template-columns: 52px minmax(80px, 1fr) 52px;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  color: rgba(255, 250, 239, 0.92);
  background: rgba(4, 13, 17, 0.54);
  font-size: 0.84rem;
  font-weight: 900;
  opacity: 0;
  pointer-events: none;
  transform: translateY(6px);
  transition: opacity 180ms ease, transform 180ms ease;
  backdrop-filter: blur(14px);
}

.viewer-progress.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.viewer-progress input {
  accent-color: var(--accent);
}

.viewer-play-button {
  position: absolute;
  left: 18px;
  bottom: 72px;
  display: grid;
  width: 58px;
  height: 58px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  color: #fffaf1;
  background: rgba(4, 13, 17, 0.5);
  box-shadow: 0 16px 34px rgba(4, 13, 17, 0.22);
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 180ms ease, transform 180ms ease, background 180ms ease;
  backdrop-filter: blur(16px);
}

.viewer-play-button.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.viewer-play-button:hover {
  background: rgba(229, 95, 42, 0.78);
}

.play-icon {
  width: 0;
  height: 0;
  margin-left: 4px;
  border-top: 12px solid transparent;
  border-bottom: 12px solid transparent;
  border-left: 18px solid currentColor;
}

.viewer-play-button.is-playing .play-icon {
  width: 18px;
  height: 22px;
  margin-left: 0;
  border-top: 0;
  border-bottom: 0;
  border-left: 6px solid currentColor;
  border-right: 6px solid currentColor;
}

.drop-overlay {
  position: absolute;
  inset: 18px;
  display: grid;
  place-content: center;
  gap: 10px;
  border: 2px dashed rgba(255, 250, 239, 0.72);
  border-radius: 26px;
  color: #fffaf1;
  background: rgba(10, 111, 119, 0.52);
  text-align: center;
  opacity: 0;
  transform: scale(0.98);
  pointer-events: none;
  transition: opacity 180ms ease, transform 180ms ease;
}

.drop-overlay.is-visible {
  opacity: 1;
  transform: scale(1);
}

.drop-overlay strong {
  font-size: clamp(1.4rem, 3vw, 3rem);
}

.drop-overlay span {
  color: rgba(255, 250, 239, 0.78);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(18px) scale(0.99);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@media (max-width: 920px) {
  body {
    overflow: auto;
  }

  .app-shell {
    grid-template-columns: 1fr;
    width: min(100% - 24px, 720px);
    height: auto;
    margin: 12px auto;
  }

  .hero-panel {
    order: 2;
    gap: 14px;
    padding: 18px;
    border-radius: 26px;
  }

  .brand {
    gap: 8px;
  }

  .lede {
    font-size: 0.94rem;
    line-height: 1.52;
  }

  .projection-row,
  .video-panel,
  .hint-panel {
    padding: 10px;
  }

  .hint-panel {
    gap: 6px;
  }

  .hint-panel span {
    padding: 6px 9px;
    font-size: 0.78rem;
  }

  .viewer-card {
    order: 1;
    height: 68vh;
    min-height: 420px;
    border-radius: 26px;
  }
}

@media (max-width: 560px) {
  .app-shell {
    width: min(100% - 16px, 720px);
    margin: 8px auto;
    gap: 12px;
  }

  .hero-panel {
    padding: 14px;
    border-radius: 22px;
  }

  .eyebrow,
  .lede {
    display: none;
  }

  h1 {
    max-width: none;
    font-size: clamp(1.18rem, 5vw, 1.5rem);
    line-height: 1.12;
  }

  .url-form {
    grid-template-columns: 1fr;
    border-radius: 24px;
  }

  .url-form input {
    min-height: 42px;
  }

  .zoom-row {
    grid-template-columns: 1fr 44px;
  }

  .zoom-row label {
    grid-column: 1 / -1;
  }

  .viewer-card {
    height: 70vh;
    min-height: 430px;
    border-radius: 22px;
  }

  .viewer-actions {
    top: 10px;
    right: 10px;
    gap: 6px;
    max-width: calc(100% - 20px);
  }

  .viewer-actions button {
    min-height: 36px;
    padding: 0 10px;
    font-size: 0.82rem;
  }

  .viewer-progress {
    right: 10px;
    bottom: 10px;
    left: 10px;
    grid-template-columns: 42px minmax(70px, 1fr) 42px;
    gap: 7px;
    padding: 8px 9px;
    font-size: 0.76rem;
  }

  .viewer-play-button {
    left: 10px;
    bottom: 58px;
    width: 50px;
    height: 50px;
  }
}