/* ============================================================================
   viewer.css — 3D STL Viewer Panel
   ============================================================================
   Styles the right-hand column of each project card that contains the
   interactive Three.js WebGL canvas and the keyboard-hint bar beneath it.
   ============================================================================ */

/* ── Viewer Wrapper ──────────────────────────────────────────────────────────
   Square (1:1 aspect ratio) container that holds the canvas + controls hint.
   Uses min() to cap at 65% of the viewport height or 100% of parent width,
   whichever is smaller — so it never overflows on short/narrow screens.
   flex-direction column lets the hint bar sit flush below the canvas. */
.viewer-wrapper {
  aspect-ratio: 1 / 1;
  width: min(65vh, 100%);
  max-width: 600px;
  margin: auto;
  flex-shrink: 0;
  background-color: var(--bg-viewport);
  border: 2px solid var(--border-dark);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;  /* Clip canvas edges to the border-radius */
}

/* ── WebGL Canvas ────────────────────────────────────────────────────────────
   Fills all remaining vertical space not taken by the controls hint bar.
   Three.js sizes it in pixels via JS, but CSS still controls its layout slot. */
.viewport-canvas {
  width: 100%;
  flex: 1;       /* Stretch to fill available space above hint bar */
  min-height: 0; /* Allow flex shrink below intrinsic size */
  display: block;
}

/* ── Controls Hint Bar ────────────────────────────────────────────────────────
   A compact 3-column row at the bottom of the viewer listing mouse/trackpad
   shortcuts (Rotate / Zoom / Pan). Font size uses clamp() to stay legible
   on any screen width without wrapping to three lines. */
.viewer-controls-hint {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: center;
  padding: 6px 12px;
  background-color: #ffffff;
  border-top: 2px solid var(--border-dark);
  font-size: clamp(0.56rem, 1.1vw, 0.62rem);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-weight: 600;
  gap: 6px;
  flex: 0 0 auto;  /* Fixed height — never stretches */
}

/* ── Single Hint Item (icon badge + label) ───────────────────────────────── */
.control-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-width: 0;  /* Allow text to truncate inside grid cell if needed */
}

/* ── Keyboard / Mouse Badge ──────────────────────────────────────────────────
   Resembles a physical keycap for the hint label (e.g. "Left Click + Drag"). */
.key-badge {
  background-color: #e2e8f0;
  border: 1px solid var(--border-dark);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--text-primary);
  font-weight: 700;
}