def fmt_currency(value: float, decimals: int = 2) -> str:
    if value is None:
        return "—"
    sign = "-" if value < 0 else ""
    return f"{sign}${abs(value):,.{decimals}f}"


def fmt_percent(value: float, decimals: int = 2, plus: bool = True) -> str:
    if value is None:
        return "—"
    sign = "+" if value > 0 and plus else ""
    return f"{sign}{value:.{decimals}f}%"


def fmt_large_number(value: float) -> str:
    if value is None:
        return "—"
    abs_val = abs(value)
    sign = "-" if value < 0 else ""
    if abs_val >= 1_000_000_000_000:
        return f"{sign}{abs_val / 1_000_000_000_000:.2f}T"
    if abs_val >= 1_000_000_000:
        return f"{sign}{abs_val / 1_000_000_000:.2f}B"
    if abs_val >= 1_000_000:
        return f"{sign}{abs_val / 1_000_000:.2f}M"
    if abs_val >= 1_000:
        return f"{sign}{abs_val / 1_000:.1f}K"
    return f"{sign}{abs_val:.2f}"


def fmt_volume(value: int) -> str:
    return fmt_large_number(float(value)) if value else "—"


def pnl_color(value: float) -> str:
    if value > 0:
        return "#a6e3a1"
    if value < 0:
        return "#f38ba8"
    return "#cdd6f4"