/* ============ embedded + ml — microscope scans ============ */

:root {
  --bg: #0a0c10;
  --bg-panel: #10131a;
  --bg-raise: #151924;
  --border: #222838;
  --border-soft: #1a1f2c;
  --text: #e9ebf2;
  --muted: #98a0b3;
  --faint: #6b7385;
  --accent: #f0b34e;          /* warm amber — matches the tea */
  --accent-soft: rgba(240, 179, 78, 0.14);
  --radius: 14px;
  font-size: 16px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr;
  background-image: radial-gradient(circle, #161b26 1px, transparent 1px);
  background-size: 28px 28px;
  overflow: hidden;
}

::selection { background: var(--accent-soft); color: var(--accent); }

kbd {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.78em;
  background: var(--bg-raise);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 5px;
}

/* ---------------- top navigation ---------------- */
.topnav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.8rem 1.4rem;
  padding: 0.8rem 1.4rem;
  border-bottom: 1px solid var(--border-soft);
  background: rgba(16, 19, 26, 0.65);
}

.topnav-right {
  display: flex;
  align-items: center;
  gap: 1.1rem;
}

.home-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.42rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--bg-panel);
  color: var(--muted);
  text-decoration: none;
  font-size: 0.84rem;
  font-weight: 600;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.home-btn:hover { background: var(--bg-raise); color: var(--text); border-color: var(--faint); }
.home-icon { color: var(--accent); flex: none; }

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  font-size: 0.95rem;
}
.brand-mark {
  width: 10px; height: 10px;
  border-radius: 3px;
  background: var(--accent);
  box-shadow: 0 0 14px rgba(240, 179, 78, 0.55);
  flex: none;
}

.topnav-tabs { display: flex; gap: 0.4rem; }

.nav-tab {
  padding: 0.42rem 1rem;
  border-radius: 9px;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  transition: background 0.15s, color 0.15s;
}
.nav-tab:hover { background: var(--bg-raise); color: var(--text); }
.nav-tab.active { background: var(--accent-soft); color: var(--accent); }

/* ---------------- content grid ---------------- */
.content {
  display: grid;
  grid-template-columns: 300px 1fr;
  min-height: 0;
}

/* ---------------- sidebar ---------------- */
.side {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  padding: 1.6rem 1.5rem;
  border-right: 1px solid var(--border-soft);
  background: rgba(16, 19, 26, 0.65);
  overflow-y: auto;
}

.side-label {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.66rem;
  letter-spacing: 0.22em;
  color: var(--faint);
  margin-bottom: 0.6rem;
}

.specimens { display: flex; flex-direction: column; }

.specimen {
  display: block;
  padding: 0.55rem 0.8rem;
  border-radius: 9px;
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: background 0.15s, color 0.15s;
}
.specimen:hover { background: var(--bg-raise); color: var(--text); }
.specimen.active {
  background: var(--accent-soft);
  color: var(--accent);
}

.process {
  margin-top: auto;
  font-size: 0.8rem;
  color: var(--faint);
  border-top: 1px solid var(--border-soft);
  padding-top: 1.2rem;
}
.process strong { color: var(--muted); font-weight: 600; }

/* ---------------- viewer column ---------------- */
.view {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  padding: 1.2rem 1.4rem 1.4rem;
  min-width: 0;
  min-height: 0;
}

.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.seg {
  display: inline-flex;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 3px;
  gap: 3px;
}
.seg-btn {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.5rem 1.05rem;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.16s, color 0.16s;
}
.seg-btn:hover { color: var(--text); }
.seg-btn.active { background: var(--accent); color: #191100; }

.zoom-controls { display: flex; gap: 6px; }
.icon-btn {
  appearance: none;
  width: 38px; height: 38px;
  border-radius: 9px;
  border: 1px solid var(--border);
  background: var(--bg-panel);
  color: var(--text);
  font-size: 1.05rem;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.icon-btn:hover { background: var(--bg-raise); border-color: var(--faint); }

.viewer {
  position: relative;
  flex: 1;
  min-height: 0;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background:
    linear-gradient(rgba(10,12,16,0.55), rgba(10,12,16,0.55)),
    radial-gradient(circle, #1a2030 1px, transparent 1px) 0 0 / 22px 22px,
    #0d1016;
  overflow: hidden;
  cursor: grab;
  touch-action: none;
}
.viewer.dragging { cursor: grabbing; }

.stage {
  position: absolute;
  inset: 0;
  transform-origin: 0 0;
  will-change: transform;
}

.layer {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  opacity: 0;
  transition: opacity 0.28s ease;
  user-select: none;
  -webkit-user-drag: none;
}
.layer.visible { opacity: 1; }

.viewer-hint {
  position: absolute;
  left: 50%;
  bottom: 0.8rem;
  transform: translateX(-50%);
  font-size: 0.76rem;
  color: var(--muted);
  background: rgba(10, 12, 16, 0.72);
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  padding: 0.3rem 0.9rem;
  pointer-events: none;
  white-space: nowrap;
  transition: opacity 0.5s;
}
.viewer-hint.faded { opacity: 0; }

/* ---------------- small screens ---------------- */
@media (max-width: 760px) {
  body {
    height: 100dvh;
  }
  .content {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr;
    min-height: 0;
    overflow-y: auto;
  }
  .side {
    flex-direction: column;
    gap: 1rem;
    border-right: 0;
    border-bottom: 1px solid var(--border-soft);
    padding: 1rem 1.2rem;
  }
  .process { margin-top: 0; }
  .viewer { min-height: 55vh; }
  .viewer-hint { display: none; }
}