:root {
  --bg: #f3ece2;
  --text: #3d2f24;
  --muted: #7a6454;
  --divider: #d5c3b0;
  --underline: #b19479;
  --underline-hover: #3d2f24;
  --hover-surface: #ebdfd1;
  --hover-border: #d6c1ad;
  --grid-dot: rgba(122, 100, 84, 0.28);
  --sage: #5f7a4f;
  --brick: #a5493a;
  --ochre: #a67c2e;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Spectral", Georgia, serif;
  color: var(--text);
  background: var(--bg);
}

.grid-backdrop {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  font-family: "Spline Sans Mono", monospace;
  font-size: 15px;
  background-image: radial-gradient(circle, var(--grid-dot) 0.75px, transparent 0.75px);
  background-size: 1ch 1ex;
  background-position: center top;
}

.page {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

h1, h2, h3 {
  font-family: "Spectral", Georgia, serif;
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--text);
  margin: 0;
}

h1 {
  font-size: 2.4rem;
}

.page-header {
  margin-bottom: 24px;
}

.page-header .label {
  margin-top: 8px;
}

p {
  font-size: 18px;
  line-height: 1.7;
}

a {
  color: var(--text);
  text-decoration: underline;
  text-decoration-color: var(--underline);
  text-underline-offset: 2px;
  transition: text-decoration-color 180ms ease;
}
a:hover {
  text-decoration-color: var(--underline-hover);
}

.label {
  font-family: "Spline Sans Mono", monospace;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.header, .divider-bottom {
  border-bottom: 1px solid var(--divider);
  background: transparent;
}

h2.divider-bottom, h3.divider-bottom {
  font-size: 1.3rem;
  padding-bottom: 6px;
  margin-bottom: 16px;
}

/* buttons (unused directly yet, kept per design system for future controls) */
.button {
  border-radius: 0;
  border: 1px solid var(--underline);
  background: transparent;
  color: var(--text);
  font-family: "Spectral", Georgia, serif;
  padding: 9px 12px;
  cursor: pointer;
  transition: border-color 180ms ease, background-color 180ms ease;
}
.button:hover {
  border-color: var(--underline-hover);
  background-color: var(--hover-surface);
}
.button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.card {
  border-radius: 0;
  background: var(--bg);
  border: 1px solid var(--divider);
  padding: 8px 10px;
}

.surface {
  border-radius: 0;
  border: 1px solid var(--divider);
  background: var(--hover-surface);
  padding: 12px 16px;
  margin: 16px 0;
}
.surface--sage { border-left: 3px solid var(--sage); }
.surface--brick { border-left: 3px solid var(--brick); }
.surface--ochre { border-left: 3px solid var(--ochre); }

/* upload dropzone */
.upload-section {
  margin: 24px 0;
}

.dropzone {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  border: 1px dashed var(--divider);
  background: transparent;
  min-height: 96px;
  padding: 18px 22px;
  cursor: pointer;
  transition: border-color 180ms ease, background-color 180ms ease;
}
.dropzone:hover {
  border-color: var(--underline);
  background-color: var(--hover-surface);
}
.dropzone-title {
  font-family: "Spectral", Georgia, serif;
  font-size: 18px;
  color: var(--text);
}

.status {
  margin-top: 12px;
}

.usage-status {
  margin-top: 8px;
}

#model-status-banner {
  margin-top: 0;
  margin-bottom: 16px;
}

/* results layout */
.results-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
  gap: 32px;
  align-items: start;
}

.metrics-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 16px 0;
}

.metric-value {
  font-family: "Spectral", Georgia, serif;
  font-size: 1.6rem;
  color: var(--text);
  margin-top: 4px;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.gallery figure {
  margin: 0;
}
.gallery img {
  display: block;
  width: 100%;
  height: auto;
  cursor: zoom-in;
}
.gallery figcaption {
  padding-top: 8px;
}

/* lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(61, 47, 36, 0.85);
  opacity: 0;
  transition: opacity 280ms ease;
}
.lightbox:not([hidden]) {
  display: flex;
  opacity: 1;
}
.lightbox img {
  width: 672px;
  max-width: 90vw;
  height: auto;
  max-height: 90vh;
  border: 1px solid var(--divider);
}
.lightbox-close {
  position: absolute;
  top: 24px;
  right: 24px;
  border-radius: 0;
  border: 1px solid var(--underline);
  background: transparent;
  color: var(--bg);
  font-family: "Spectral", Georgia, serif;
  font-size: 20px;
  line-height: 1;
  width: 36px;
  height: 36px;
  cursor: pointer;
  transition: border-color 180ms ease, background-color 180ms ease;
}
.lightbox-close:hover {
  border-color: var(--bg);
  background-color: rgba(243, 236, 226, 0.12);
}

.explanation {
  margin-top: 32px;
}
.explanation ul {
  padding-left: 20px;
}

.page-footer {
  margin-top: 64px;
  border-top: 1px solid var(--divider);
  padding-top: 16px;
}

@media (max-width: 720px) {
  .results-grid {
    grid-template-columns: 1fr;
  }
  .gallery {
    grid-template-columns: 1fr;
  }
  .metrics-row {
    grid-template-columns: 1fr;
  }
}