:root {
  color-scheme: light;
  --bg: #f7f7f4;
  --surface: #ffffff;
  --surface-muted: #f1f1ee;
  --border: #deded8;
  --text: #20201d;
  --muted: #6f6d66;
  --accent: #0f6f5c;
  --accent-ink: #ffffff;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 18% 8%, rgba(255, 255, 255, 0.92), transparent 32rem),
    linear-gradient(180deg, #fbfbf8 0%, var(--bg) 100%);
  color: var(--text);
}

a {
  color: inherit;
  text-decoration: none;
}

.shell {
  width: min(1180px, calc(100vw - 40px));
  margin: 0 auto;
  padding: 40px 0;
}

.page-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 28px;
}

.page-header h1,
.center-panel h1 {
  margin: 0;
  font-size: 34px;
  line-height: 1.05;
  font-weight: 650;
  letter-spacing: 0;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 20px;
  border: 1px solid #10100f;
  border-radius: 999px;
  background: #10100f;
  color: var(--accent-ink);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 10px 26px rgba(16, 16, 15, 0.08);
}

.button.secondary {
  background: #f1f1ef;
  color: var(--text);
  border-color: transparent;
  box-shadow: none;
}

.artifact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 22px;
}

.artifact-tile {
  display: block;
  overflow: hidden;
  border: 1px solid rgba(30, 30, 26, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 14px 44px rgba(25, 25, 20, 0.07);
}

.tile-cover {
  position: relative;
  aspect-ratio: 1;
  overflow: hidden;
  isolation: isolate;
  background: var(--cover-base);
}

.tile-cover::before {
  content: "";
  position: absolute;
  inset: -22%;
  background:
    radial-gradient(circle at var(--cover-x) var(--cover-y), var(--cover-a) 0 16%, transparent 42%),
    radial-gradient(circle at var(--cover-x2) var(--cover-y2), var(--cover-b) 0 18%, transparent 43%),
    radial-gradient(circle at var(--cover-x3) var(--cover-y3), var(--cover-c) 0 14%, transparent 40%),
    linear-gradient(135deg, var(--cover-base), var(--cover-veil));
  filter: blur(24px) saturate(1.12);
  transform: rotate(var(--cover-rotation)) scale(var(--cover-scale));
}

.tile-cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, rgba(255, 255, 255, 0.34), transparent 32%),
    radial-gradient(circle at 16% 12%, rgba(255, 255, 255, 0.28), transparent 28%),
    linear-gradient(180deg, transparent, rgba(255, 255, 255, 0.1));
  mix-blend-mode: screen;
}

.thumbnail-cover {
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f1f1ee;
}

.thumbnail-cover::before,
.thumbnail-cover::after {
  display: none;
}

.tile-thumbnail {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center center;
}

.cover-variant-1 {
  background:
    radial-gradient(circle at 22% 16%, rgba(255, 255, 255, 0.24), transparent 24%),
    linear-gradient(130deg, var(--cover-base), var(--cover-veil));
}

.cover-variant-1::before {
  background:
    linear-gradient(105deg, transparent 0 18%, rgba(255, 255, 255, 0.18) 28%, transparent 42%),
    radial-gradient(circle at var(--cover-x) var(--cover-y), var(--cover-a) 0 20%, transparent 48%),
    radial-gradient(circle at var(--cover-x2) var(--cover-y2), var(--cover-b) 0 19%, transparent 45%),
    radial-gradient(circle at var(--cover-x3) var(--cover-y3), var(--cover-c) 0 17%, transparent 42%);
}

.cover-variant-2 {
  background:
    linear-gradient(145deg, var(--cover-veil), var(--cover-base));
}

.cover-variant-2::before {
  background:
    radial-gradient(ellipse at 18% 72%, var(--cover-a) 0 20%, transparent 48%),
    radial-gradient(ellipse at 84% 22%, var(--cover-b) 0 18%, transparent 42%),
    radial-gradient(ellipse at 66% 74%, var(--cover-c) 0 20%, transparent 48%),
    linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.22), transparent);
}

.cover-variant-3 {
  background:
    radial-gradient(circle at 50% 50%, var(--cover-veil), transparent 60%),
    linear-gradient(120deg, var(--cover-base), var(--cover-veil));
}

.cover-variant-3::before {
  background:
    linear-gradient(28deg, transparent 0 34%, rgba(255, 255, 255, 0.2) 46%, transparent 58%),
    radial-gradient(circle at 30% 24%, var(--cover-a) 0 18%, transparent 44%),
    radial-gradient(circle at 72% 64%, var(--cover-b) 0 22%, transparent 50%),
    radial-gradient(circle at 74% 24%, var(--cover-c) 0 15%, transparent 40%);
}

.cover-variant-4 {
  background:
    linear-gradient(110deg, var(--cover-base), var(--cover-veil) 62%, #fff);
}

.cover-variant-4::before {
  background:
    radial-gradient(ellipse at 20% 28%, var(--cover-a) 0 18%, transparent 43%),
    radial-gradient(ellipse at 58% 76%, var(--cover-b) 0 22%, transparent 52%),
    radial-gradient(ellipse at 88% 28%, var(--cover-c) 0 16%, transparent 42%);
}

.tile-body {
  padding: 18px;
}

.tile-body h2 {
  margin: 0;
  font-size: 15px;
  line-height: 1.3;
  font-weight: 650;
}

.tile-body p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.center-panel,
.empty-state,
.panel {
  max-width: 520px;
  margin: 12vh auto 0;
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 14px 38px rgba(28, 28, 24, 0.07);
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  margin-bottom: 18px;
  border-radius: 10px;
  background: #181914;
  color: #fff;
  font-weight: 700;
}

.auth-mount {
  margin-top: 22px;
}

.upload-form {
  display: grid;
  gap: 18px;
}

.upload-form label {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
}

.upload-form input {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0 12px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
}

.file-picker {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 44px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
}

.file-picker input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.file-picker-button {
  display: inline-flex;
  align-items: center;
  align-self: stretch;
  padding: 0 14px;
  border-right: 1px solid var(--border);
  background: var(--surface-muted);
  color: var(--text);
  font-weight: 600;
}

.file-picker-name {
  min-width: 0;
  padding: 0 14px;
  overflow: hidden;
  color: var(--text);
  font-weight: 500;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.error-banner {
  margin-bottom: 18px;
  padding: 12px;
  border: 1px solid #e0b3a7;
  border-radius: 8px;
  background: #fff2ee;
  color: #8f2b16;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

.viewer-shell {
  width: 100vw;
  margin: 0;
  padding: 0;
}

.artifact-viewer {
  position: relative;
  width: 100vw;
  height: 100vh;
  background: white;
}

.artifact-viewer iframe {
  width: 100%;
  height: 100%;
  border: 0;
  background: white;
}

.home-actions,
.viewer-actions {
  position: fixed;
  right: 16px;
  top: 16px;
  z-index: 10;
  display: flex;
  gap: 8px;
  padding: 6px;
  border: 1px solid rgba(30, 30, 26, 0.1);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 12px 32px rgba(25, 25, 20, 0.12);
  backdrop-filter: blur(18px);
}

.viewer-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 0 14px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--text);
  font: inherit;
  font-size: 13px;
  font-weight: 650;
  cursor: pointer;
}

.viewer-button:hover {
  background: rgba(30, 30, 26, 0.08);
}

.viewer-form {
  display: contents;
}

.viewer-button.danger {
  color: #9f2f1d;
}

.viewer-button.danger:hover {
  background: rgba(159, 47, 29, 0.1);
}

@media (max-width: 720px) {
  .shell {
    width: min(100vw - 24px, 1180px);
    padding: 24px 0;
  }

  .page-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .actions {
    justify-content: flex-start;
  }

  .center-panel,
  .empty-state,
  .panel {
    margin-top: 32px;
  }

  .home-actions,
  .viewer-actions {
    left: 12px;
    right: 12px;
    justify-content: space-between;
  }
}