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+# Requirements
+
+1. Players play curling in a mobile browser from a 2D overhead view.
+2. The sheet is shown in portrait.
+3. A room has two teams and an unlimited number of clients.
+4. Each client picks Team 1 or Team 2 on that device.
+5. Anyone on the team whose turn it is may throw.
+6. Players join a room from a shareable link.
+7. If the link has no room, the client creates one and writes that room into the URL.
+8. A match has 10 ends. Each team has 8 stones per end.
+9. Extra ends are played while the score is tied after 10 ends.
+10. Hammer is random at the start. The team without hammer throws first in the end.
+11. The team that scores gives hammer away. A blank end keeps hammer.
+12. After a throw, that team has one fewer stone and the other team throws.
+13. When all throws have completed, the end is scored.
+14. Only stones touching the house can score.
+15. The team closest to the tee scores one point for each of its stones nearer than the opponent's nearest stone.
+16. If no stone can score, the end is 0-0.
+17. Every client sees the current end, both scores, hammer, whose turn it is, stones remaining, stone positions, trajectories from all shots, and whether the match is over.
+18. When the match ends, both scores are shown with a winner, or with no winner if tied.
+19. A thrown stone starts at the hack and travels toward the broom. The player chooses initial speed and curl.
+20. Clockwise curl moves the stone to the thrower's right.
+21. Stones bounce off other stones. Stones do not bounce back from a sideline or the backline.
+22. A stone is out if it touches a sideline. A stone must fully cross the backline to be out. A stone is out if it never fully crosses the hog line.
+23. The ice is a curling sheet with a house, hog line, sidelines, and a backline on the 12-foot ring.
+24. The default view frames the house, sidelines, and backline above the controls.
+25. The player can pan up and down the sheet to the hog line.
+26. On turn, the player drags to place the broom anywhere on the sheet, then throws.
+27. The player sets throw weight on a 1 to 10 scale, including named weights hack, board, control, normal, and peel.
+28. The player sets curl clockwise or counterclockwise. Clockwise is the default.
+29. Throw controls work only on that team's turn and only while stones are not moving.
+30. The HUD shows eight remaining-stone markers per team, a hammer marker, and a scoreboard with each end and a total.
+31. After the stones stop and the end is scored, an end-result overlay appears. The player dismisses it.
+32. All clients see the same stone motion. A stone that leaves play is hidden when it leaves the sheet.
+33. Errors and the final result appear on the page as copyable text, not as a blocking alert.
+34. Pinch-zoom is off. The client remembers the last team choice.