Mistral Large 4

We need answer only svg code block. Need craft valid standalone SVG 800x600, no JS, SMIL/CSS animations. Need ensure first paint visible, animations loop seamless, shooting star every 4s first within 2s. Need no external. Need recognizable fox sitting on hill looking at moon. Need hand-written shapes/paths. Need gradients. Need adapt? SVG fixed viewBox scales. Need one fenced code block exactly. Need be careful with SMIL syntax in standalone SVG. Use <svg xmlns... viewBox="0 0 800 600" width="800" height="600"> maybe width/height 100%? Requirement viewBox 0 0 800 600. Can set width="800" height="600" but in iframe scales? Standalone SVG rendered maybe. Use preserveAspectRatio. Fine.

Need design. Let's plan composition:
- Sky background rect gradient dark navy to indigo. viewBox 0 0 800 600.
- defs: radialGradient moonGlow, linearGradient sky, linearGradient hill, linearGradient fox body, tail gradient, maybe star gradient. Filters? SVG filters allowed (hand-written) but maybe avoid heavy. Use radial gradient glow no filter.
- Moon at around (620,130) radius 55, glow circle radius 110 fill radial gradient white to transparent opacity. Craters.
- Stars: many small circles/paths with class star and SMIL animate opacity or r. Use groups. Twinkle via <animate attributeName="opacity" values="0.2;1;0.2" dur="3s" repeatCount="indefinite" begin="0.4s"/> etc. Many stars maybe 40. Use <circle> with animate. Seamless loop values symmetric.
- Shooting star: group with line/circle moving across sky. Need every 4s first within 2s. Use SMIL animateMotion along path with begin="0s" dur="4s" repeatCount="indefinite" keyPoints/keyTimes for opacity? Simpler: a <g> with <animateTransform type="translate" values="..."> and <animate attributeName="opacity" values="0;1;1;0" keyTimes="0;0.1;0.8;1" dur="4s" repeatCount="indefinite"/> and path? Need line oriented along motion. Use group containing a gradient line from head to tail, animateMotion with rotate="auto"? If line is horizontal from x=0 to x=-80 (tail behind), animateMotion path M 900 80 L -100 260 maybe. Use <animateMotion dur="4s" repeatCount="indefinite" begin="0s" path="M 880 70 C 700 120 420 190 40 300" rotate="0"/> and line drawn from 0,0 to -90,8? Need orientation along path; rotate="auto" can orient x-axis along motion, then draw tail behind at negative x. Use <line x1="0" y1="0" x2="-110" y2="0" stroke="url(#shoot)" stroke-width="4" stroke-linecap="round"/> with animateMotion rotate="auto". But gradient along line? Define linearGradient shootGrad x1=0 y1=0 x2=-110? userSpaceOnUse maybe complicated. Simpler stroke white with opacity animate and a circle head. Motion path from right top to left bottom. Use group opacity animate values 0;1;1;0 keyTimes 0;0.08;0.75;1 dur 4s. The motion itself dur 4s repeat indefinite begin 0. Good first at 0 within 2s. Seamless? At end jumps back but opacity 0 at end/start so invisible. Good.
- Distant hills: path silhouettes at y around 360-450, darker blue. Trees: simple triangles/ellipses on sides, dark. Background elements.
- Hill foreground: big path from bottom, gradient green/blue? Night hill dark teal with rim light. Fox sitting on hill around (360,430) maybe looking up right toward moon at (620,130). Need silhouette/profile facing right/up. Sitting fox: body seated, hind leg, chest, head turned toward moon (to right). Pointy ears, snout, white chest maybe, bushy tail curled around with white tip swaying. Need clearly recognizable.
Need draw fox with paths. Use layered shapes:
  - tail behind body: big bushy tail curving from left of body around front, gradient orange, white tip. Sway animation rotate around base. Use <g class="tail" style transform-origin> with SMIL animateTransform type="rotate" values="-4 300 470; 5 300 470; -4 300 470" dur="6s" repeatCount indefinite additive? Need seamless. For SMIL transform origin use values with center. Could use CSS @keyframes tailSway { transform: rotate(-4deg)} transform-origin: 300px 470px; but CSS in SVG works in Chrome. Simpler use <animateTransform attributeName="transform" type="rotate" values="-4 305 468; 6 305 468; -4 305 468" dur="7s" repeatCount="indefinite"/> inside tail group. Good.
  - Body: sitting haunch path orange: M300 455 C270 430 285 385 330 370 C360 360 390 375 400 410 C410 445 385 470 350 475 Z maybe. Need face right. Head at (410,320) maybe. Let's coordinate: hill crest around y=455 at x=360. Fox sits with base y=480. Head around (430,330), snout pointing up-right to moon. Ears at (410,285),(450,290). Body seated from (330,480) to (410,390). Tail curls left/front around (270,470).
Maybe easier: fox in profile facing right, sitting: 
   body: path d="M318 478 C300 430 320 385 365 372 C405 360 432 385 438 425 C444 462 415 486 372 490 C350 492 332 488 318 478 Z" fill orange dark.
   chest lighter: path d="M392 380 C420 395 432 430 420 465 C405 450 390 420 392 380 Z" fill cream opacity.
   head: circle/ellipse at (438,330) rotate? Use path for head with snout: d="M410 300 C430 285 465 290 480 315 L512 330 L482 340 C470 365 430 368 412 345 C400 330 400 312 410 300 Z" Hmm snout to right at (512,330). Need looking at moon (up-right), maybe snout tip (520,318), nose black. Ears triangles at top of head: path M418 302 L410 255 L445 292 Z and M455 295 L470 252 L482 305 Z. Inner ear pink/dark.
   Eye: small dark circle at (455,322) with highlight; maybe closed? looking up: eye at (462,318). 
   Legs: front leg straight down at (405,470) etc, hind haunch. Sitting: one front leg vertical from chest to ground, paw at (410,485); hind leg haunch. Use darker orange shapes.
   Tail: big bushy behind left and curling to front right? Sitting fox tail often wraps around side. Draw tail as large curve from base left (300,480) sweeping left/down then up? White tip at end near (250,430). Need visible. Tail group behind body: path d="M330 470 C270 480 220 455 205 410 C195 375 220 350 255 360 C230 380 235 420 270 440 C300 455 330 450 350 430 Z" maybe not bushy. Better tail: big fluffy shape around left side: outer path fill gradient: M345 455 C285 500 190 480 160 420 C140 375 170 330 220 330 C200 360 210 410 250 435 C290 460 330 445 360 420 Z. White tip: path at left/top end: M220 330 C190 325 165 345 160 380 C185 360 210 360 235 375 C225 355 220 340 220 330 Z fill cream. Hmm tip should be at end of tail, likely outer left end. Sway rotate around (345,455).
Need ensure tail sway doesn't detach; rotate small.
- Fox looking at moon: head oriented up/right; maybe add subtle head bob? Not required. Could animate ear twitch? Optional but at least required. Keep minimal.
- Grass/flowers on hill, maybe fireflies? subtle. Add small plants.
- Color palette: sky #0b1026 to #1b2a4a; moon #fff7d6; hills #16213f/#101a33; hill foreground #234a3c? Night green #1f3d34 with rim #6fae8d; fox orange #e8833a, dark #b95a24, cream #ffe8c7; stars #fff.
Need include at least one gradient: many.
Need valid SVG: no JS. Use <style> maybe for star twinkle CSS? SMIL enough. Could use CSS for .star { animation: twinkle ... } but SMIL more reliable in SVG standalone? Both ok. Use SMIL for all. Need many stars twinkling: create <g id="stars"> with circles each having <animate attributeName="opacity" values=".15;1;.15" dur="..." begin="..." repeatCount="indefinite"/>. Also animate r slightly? opacity enough. Use varied dur/begin but all loop. Need first within? stars immediate.
Potential issue: SMIL begin negative values allowed for desync (begin="-1.2s") yes. Use negative begins to start mid-cycle seamlessly. For shooting star begin="0s" dur 4s.
Need avoid CSS transform-box issues; use SMIL.
Need ensure no external references. Fine.
Need output exactly one fenced code block with ```svg. No text before/after. Need final only code block.
Need construct carefully with well-formed XML. Avoid ampersands. Use rgba? SVG supports fill-opacity better. Use hex with opacity attributes.
Need include title/desc maybe ok.
Need maybe width="100%" height="100%"? If standalone svg in iframe with 1280x800, width/height 800/600 might not fill but ok. Requirement viewBox only. Set width="800" height="600" preserveAspectRatio="xMidYMid meet". In screenshot maybe centered. Good.
Need maybe background rect 800x600.
Let's write SVG.
Need detailed stars: Could use <use> with star path? Hand-written shapes only; <use> references internal ok. But to vary, generate circles manually. Many stars maybe 35. Need not too verbose but enough. Use groups with different animate. Could define a star symbol and use with animate? <use> can have animate? Better explicit circles. Use small circles and a few 4-point sparkle paths. Keep manageable.
Star twinkle: each circle with animate opacity. Use dur between 2.4-4.8, begin negative. Example:
<g fill="#fff">
 <circle cx="60" cy="80" r="1.6"><animate attributeName="opacity" values="0.2;1;0.2" dur="3.2s" begin="-0.4s" repeatCount="indefinite"/></circle>
 ...
</g>
Need opacity default 1; animate values set. Good.
Shooting star: Need gradient for trail? Define linearGradient id="trail" x1="1" y1="0" x2="0" y2="0" gradientUnits="objectBoundingBox" stops white to transparent. For line x1=0 y1=0 x2=-120 y2=0, gradient objectBoundingBox with x1=1 (head at 0?) Actually line bounding box from x=-120 to 0; head at x=0 is right edge (x=1), tail at x=-120 (x=0). Want head opaque at x=1, tail transparent at x=0: stop offset 0 transparent, offset 1 white. Good. line stroke url(#trail). With rotate="auto", local x axis along motion, head at origin, tail negative x. Good.
<g opacity="0">
 <animate attributeName="opacity" values="0;1;1;0" keyTimes="0;0.08;0.72;1" dur="4s" begin="0s" repeatCount="indefinite"/>
 <g>
  <animateMotion dur="4s" begin="0s" repeatCount="indefinite" rotate="auto" path="M 860 60 C 650 105 430 175 60 285"/>
  <line x1="0" y1="0" x2="-130" y2="0" stroke="url(#trail)" stroke-width="5" stroke-linecap="round"/>
  <circle r="4" fill="#fff"/>
  <circle r="9" fill="#fff" opacity="0.25"/>
 </g>
</g>
Potential animateMotion on inner g while outer opacity animates ok. At repeat, motion jumps but opacity 0. Good.
Moon glow: circle cx=620 cy=125 r=120 fill url(#moonGlow). radialGradient stops: offset 0 #fffbe8 opacity .9, .35 #ffe9a8 .35, 1 transparent. Moon circle r=52 fill url(#moonFace) maybe radial gradient #fffdf0 to #e8d9a8. Craters fill #d8c893 opacity .5.
Clouds? maybe subtle path across moon with animation? Not required; avoid.
Distant hills: path d="M0 380 C120 330 240 360 360 335 C500 305 640 350 800 315 L800 600 L0 600 Z" fill #141f3d opacity .9. Another closer: d="M0 430 C150 390 300 430 470 400 C620 375 720 410 800 395 L800 600 L0 600 Z" fill #101a33.
Trees: left cluster dark silhouettes: trunks rects, pine triangles paths at x 80-180 y 360-450; right cluster x 700. Use fill #0c1529. Maybe a couple rounded trees. Keep background elements.
Foreground hill: path d="M0 505 C140 455 260 470 390 450 C540 425 680 455 800 430 L800 600 L0 600 Z" fill url(#hillGrad). Add rim path stroke #8fd0a8 opacity .25 along top. Add grass strokes.
Fox position: Need sits on hill around x=360 y=455 crest. Maybe foreground hill top at x=360 y=450. Fox base y=500? If hill surface around y=455 at x=360, fox should sit on it, paws at y=492? Could be slightly in front of hill, base y=505. Hill top behind at 450, fox overlaps. Let's place fox centered (360,430) with base y=505, on near slope. Moon at (630,120), fox gaze up right.
Coordinates fox:
- shadow ellipse cx=365 cy=505 rx=95 ry=16 fill #071018 opacity .35.
- tail group behind: transform-origin around (350,470). Outer tail path maybe: d="M352 468 C300 512 205 505 158 452 C125 415 132 360 178 338 C160 378 178 430 224 452 C268 473 320 462 360 432 C372 424 372 452 352 468 Z" Hmm weird. Let's design tail as bushy curl to left of fox: base near (350,465), sweeps left to tip at (170,380). Outer: M356 462 C300 500 210 490 165 440 C135 405 145 350 190 330 C175 370 195 420 240 440 C285 460 330 450 362 425 Z. White tip at far end around (190,330)-(145,350)-(165,440)? Actually tip is end of tail at leftmost/top? Bushy tail tip white at the pointed end. Make tail end at left: path outer ends around (150,380); white tip cap: M190 330 C160 325 135 345 132 382 C158 365 185 372 205 395 C200 365 195 340 190 330 Z. Hmm.
Simplify: Tail as large comma shape from base (350,460) curving counterclockwise to tip at (165,365), with white tip at (165,365). Outer path: M350 462 C285 505 190 485 150 420 C125 375 150 330 200 322 C175 355 185 410 230 438 C275 465 330 455 362 425 C372 415 368 450 350 462 Z. White tip: M200 322 C170 318 145 335 138 368 C165 350 195 355 220 380 C212 355 206 335 200 322 Z fill cream. Good enough; sway rotates around 350 462.
- Body: seated haunch orange: d="M318 492 C292 455 300 405 338 382 C372 362 414 372 432 408 C450 444 432 482 392 496 C362 506 336 505 318 492 Z" fill url(#foxBody). Add darker back/hind: path d="M318 492 C300 450 315 405 355 388 C330 420 330 465 355 492 Z" fill #b95a24 opacity .55. 
- Chest/muzzle cream: path d="M398 392 C424 410 436 448 424 482 C404 466 392 430 398 392 Z" fill #ffe6c4 opacity .95.
- Front leg: path d="M404 438 C420 455 424 480 414 500 L392 500 C398 475 396 455 388 440 Z" fill #d96f2e; paw ellipse cx=403 cy=500 rx=20 ry=8 fill #b95a24; cream paw? 
- Hind foot: ellipse cx=350 cy=498 rx=34 ry=12 fill #b95a24; maybe.
- Head: Need connect to body at neck around (420,390) to head (455,325). Draw neck/head as one path facing right/up: d="M398 386 C408 350 430 318 462 305 C492 293 522 305 535 330 L560 342 L532 354 C520 378 485 388 455 376 C430 366 412 398 398 386 Z" Hmm snout to right (560,342), but moon up-right, maybe snout points (548,318) up. Let's make head tilted up: skull around (470,320), snout tip (545,300), nose black. Path: M410 380 C420 340 445 310 480 300 C505 293 525 298 540 312 L565 305 L548 328 C535 352 500 362 470 350 C445 340 425 365 410 380 Z. Not perfect.
Maybe use simpler shapes: head ellipse rotated -20 at (475,325) rx=42 ry=34 fill orange; snout path triangle/rounded from (500,315) to (555,300) to (515,340) fill orange; nose at (555,300). Ears triangles on top. This is recognizable. Use group head with slight look up (rotate -12 around neck). 
Head group: <g transform="translate(430 372) rotate(-18)"> maybe local coords easier. Draw in local: ears at (-25,-55), (15,-60); head ellipse (0,0) rx 40 ry 32; snout path M25 -8 L75 -22 L38 18 Z; nose circle (75,-22); eye (12,-8); cheek cream. Then transform translate(430 370) rotate(-18) so snout points up-right. Good. Body neck connects at (430,370). Let's do that.
Local head after transform: ears: path d="M-28 -22 L-38 -70 L-2 -34 Z" and d="M8 -30 L28 -72 L38 -24 Z" fill orange; inner ears smaller fill #7a3b1d or pink. Head ellipse cx=0 cy=-5 rx=42 ry=34. Snout: path d="M28 -12 C50 -20 72 -28 88 -34 C78 -12 60 4 34 10 Z" fill #e8833a; nose circle cx=88 cy=-34 r=6 fill #241a20; muzzle cream path d="M34 10 C58 4 76 -10 88 -34 C80 -8 58 8 34 10 Z"? Hmm. White cheek/chest: path d="M-5 18 C20 26 45 20 60 -2 C45 28 15 38 -12 26 Z" fill cream opacity .8. Eye at (18,-12) r=4 dark with white highlight; looking up (pupil toward moon). Maybe eye closed happy? Use open eye looking up-right: circle cx=20 cy=-14 r=4.5 fill #201722; highlight cx=21.5 cy=-15.5 r=1.3 #fff. 
Transform translate(425 368) rotate(-22): snout local (88,-34) maps roughly x=425+88*cos-34*sin? cos22=.927 sin22=.375 (rotate -22: x'=x cos + y sin? For -22, x'=x cos(-22)-y sin(-22)=.927x+ .375y? y=.375? Let's not compute; roughly up-right). Good.
Need ensure head connects: body neck at (410,385); head group at (425,368) overlaps.
Maybe add neck path fill orange behind head: path d="M392 398 C410 370 430 360 452 360 L470 395 C445 405 420 412 392 398 Z".
Fox overall maybe okay.
Add subtle fox breathing? Not required. Tail sway required. Maybe ear twitch subtle: animateTransform on one ear rotate values 0;8;0 dur 9s. Optional. Could include but keep no errors. Maybe skip.
Plants: small grass paths on hill stroke #79b894; few flowers dots. Add fireflies with animate opacity/translate? Not required; can add 3 subtle.
Need final code concise but complete. Ensure XML valid: attributes quotes, no unescaped. Use style? maybe not. SMIL only.
Need include <defs> gradients: sky, moonGlow, moonFace, hill, hillBack?, foxBody, tailGrad, trail. Use gradientUnits default objectBoundingBox. For radial moonGlow with cx=.5 cy=.5 r=.5.
Potential issue radialGradient stop opacity syntax: <stop offset="0" stop-color="#fff8dc" stop-opacity="0.85"/> etc.
Need maybe set shape-rendering default.
Let's draft final. Need no markdown text outside. Ensure code block starts ```svg and ends ```.
Check animations seamless: star opacity values .2;1;.2 loops. Tail values -4;6;-4 around point dur 8s. Shooting star every 4 begin 0. Good.
Need maybe first shooting star within 2 seconds: begin=0 dur=4 visible by 0.32s. Good.
Need no horizontal scrollbar irrelevant svg.
Let's final with moderate detail. Ensure all tags closed. Use <animate .../> self-closing ok in XML. 
Need be valid: In SVG, <animate attributeName="opacity" values="0;1;1;0" keyTimes="0;0.08;0.72;1"...> keyTimes count matches values. Good.
For star animate values maybe 3 values no keyTimes. Good.
Tail animateTransform: attributeName="transform" type="rotate" values="-5 352 462; 6 352 462; -5 352 462" dur="7s" repeatCount="indefinite". If group already has no transform, fine. Add additive="replace" default.
Head maybe subtle animateTransform rotate? Could conflict with transform attribute if animateTransform replace would override translate. Avoid animating transformed head. If want ear twitch inside local group no base transform on same element? Could add animateTransform to ear path with values rotate small around base; but path has no transform, ok. Skip.
Need maybe moon glow pulse subtle: animate opacity .8;1;.8 dur 6s. ok.
Let's produce. Ensure no JS. final only code block.